Merge branches 'bugzilla-14668' and 'misc-2.6.35' into release

100 files changed, 5623 insertions, 1805 deletions

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 93d2c7971df..74641151880 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -360,4 +360,13 @@ config ACPI_SBS
 	  To compile this driver as a module, choose M here:
 	  the modules will be called sbs and sbshc.
 
+config ACPI_HED
+	tristate "Hardware Error Device"
+	help
+	  This driver supports the Hardware Error Device (PNP0C33),
+	  which is used to report some hardware errors notified via
+	  SCI, mainly the corrected errors.
+
+source "drivers/acpi/apei/Kconfig"
+
 endif	# ACPI
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index a8d8998dd5c..6ee33169e1d 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -19,7 +19,7 @@ obj-y				+= acpi.o \
 
 # All the builtin files are in the "acpi." module_param namespace.
 acpi-y				+= osl.o utils.o reboot.o
-acpi-y				+= hest.o
+acpi-y				+= atomicio.o
 
 # sleep related files
 acpi-y				+= wakeup.o
@@ -59,6 +59,7 @@ obj-$(CONFIG_ACPI_BATTERY)	+= battery.o
 obj-$(CONFIG_ACPI_SBS)		+= sbshc.o
 obj-$(CONFIG_ACPI_SBS)		+= sbs.o
 obj-$(CONFIG_ACPI_POWER_METER)	+= power_meter.o
+obj-$(CONFIG_ACPI_HED)		+= hed.o
 
 # processor has its own "processor." module_param namespace
 processor-y			:= processor_driver.o processor_throttling.o
@@ -66,3 +67,5 @@ processor-y			+= processor_idle.o processor_thermal.o
 processor-$(CONFIG_CPU_FREQ)	+= processor_perflib.o
 
 obj-$(CONFIG_ACPI_PROCESSOR_AGGREGATOR) += acpi_pad.o
+
+obj-$(CONFIG_ACPI_APEI)		+= apei/
diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 62122134693..d269a8f3329 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -43,6 +43,10 @@ static DEFINE_MUTEX(isolated_cpus_lock);
 #define CPUID5_ECX_EXTENSIONS_SUPPORTED (0x1)
 #define CPUID5_ECX_INTERRUPT_BREAK	(0x2)
 static unsigned long power_saving_mwait_eax;
+
+static unsigned char tsc_detected_unstable;
+static unsigned char tsc_marked_unstable;
+
 static void power_saving_mwait_init(void)
 {
 	unsigned int eax, ebx, ecx, edx;
@@ -87,8 +91,8 @@ static void power_saving_mwait_init(void)
 
 		/*FALL THROUGH*/
 	default:
-		/* TSC could halt in idle, so notify users */
-		mark_tsc_unstable("TSC halts in idle");
+		/* TSC could halt in idle */
+		tsc_detected_unstable = 1;
 	}
 #endif
 }
@@ -168,16 +172,14 @@ static int power_saving_thread(void *data)
 
 		do_sleep = 0;
 
-		current_thread_info()->status &= ~TS_POLLING;
-		/*
-		 * TS_POLLING-cleared state must be visible before we test
-		 * NEED_RESCHED:
-		 */
-		smp_mb();
-
 		expire_time = jiffies + HZ * (100 - idle_pct) / 100;
 
 		while (!need_resched()) {
+			if (tsc_detected_unstable && !tsc_marked_unstable) {
+				/* TSC could halt in idle, so notify users */
+				mark_tsc_unstable("TSC halts in idle");
+				tsc_marked_unstable = 1;
+			}
 			local_irq_disable();
 			cpu = smp_processor_id();
 			clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER,
@@ -200,8 +202,6 @@ static int power_saving_thread(void *data)
 			}
 		}
 
-		current_thread_info()->status |= TS_POLLING;
-
 		/*
 		 * current sched_rt has threshold for rt task running time.
 		 * When a rt task uses 95% CPU time, the rt thread will be
diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile
index 7423052ece5..d93cc06f4bf 100644
--- a/drivers/acpi/acpica/Makefile
+++ b/drivers/acpi/acpica/Makefile
@@ -14,12 +14,12 @@ acpi-y := dsfield.o   dsmthdat.o  dsopcode.o  dswexec.o  dswscope.o \
 
 acpi-y += evevent.o  evregion.o  evsci.o    evxfevnt.o \
 	 evmisc.o   evrgnini.o  evxface.o  evxfregn.o \
-	 evgpe.o    evgpeblk.o
+	 evgpe.o    evgpeblk.o evgpeinit.o  evgpeutil.o
 
 acpi-y += exconfig.o  exfield.o  exnames.o   exoparg6.o  exresolv.o  exstorob.o\
 	 exconvrt.o  exfldio.o  exoparg1.o  exprep.o    exresop.o   exsystem.o\
 	 excreate.o  exmisc.o   exoparg2.o  exregion.o  exstore.o   exutils.o \
-	 exdump.o    exmutex.o  exoparg3.o  exresnte.o  exstoren.o
+	 exdump.o    exmutex.o  exoparg3.o  exresnte.o  exstoren.o  exdebug.o
 
 acpi-y += hwacpi.o  hwgpe.o  hwregs.o  hwsleep.o hwxface.o hwvalid.o
 
diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index 3e6ba99e405..64d1e5c2d4a 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -73,8 +73,10 @@ acpi_ev_queue_notify_request(struct acpi_namespace_node *node,
 			     u32 notify_value);
 
 /*
- * evgpe - GPE handling and dispatch
+ * evgpe - Low-level GPE support
  */
+u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
+
 acpi_status
 acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info);
 
@@ -85,19 +87,13 @@ acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info);
 struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
 						       u32 gpe_number);
 
+struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
+						     struct acpi_gpe_block_info
+						     *gpe_block);
+
 /*
- * evgpeblk
+ * evgpeblk - Upper-level GPE block support
  */
-u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
-
-acpi_status
-acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
-
-acpi_status
-acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
-			    struct acpi_gpe_block_info *gpe_block,
-			    void *context);
-
 acpi_status
 acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
 			 struct acpi_generic_address *gpe_block_address,
@@ -116,12 +112,37 @@ u32
 acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info,
 		     u32 gpe_number);
 
-u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
+/*
+ * evgpeinit - GPE initialization and update
+ */
+acpi_status acpi_ev_gpe_initialize(void);
+
+void acpi_ev_update_gpes(acpi_owner_id table_owner_id);
 
 acpi_status
-acpi_ev_check_for_wake_only_gpe(struct acpi_gpe_event_info *gpe_event_info);
+acpi_ev_match_gpe_method(acpi_handle obj_handle,
+			 u32 level, void *context, void **return_value);
 
-acpi_status acpi_ev_gpe_initialize(void);
+acpi_status
+acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
+			  u32 level, void *context, void **return_value);
+
+/*
+ * evgpeutil - GPE utilities
+ */
+acpi_status
+acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
+
+u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
+
+struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number);
+
+acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
+
+acpi_status
+acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+			    struct acpi_gpe_block_info *gpe_block,
+			    void *context);
 
 /*
  * evregion - Address Space handling
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index f8dd8f250ac..9070f1fe8f1 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -112,6 +112,19 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_leave_wake_gpes_disabled, TRUE);
  */
 u8 ACPI_INIT_GLOBAL(acpi_gbl_use_default_register_widths, TRUE);
 
+/*
+ * Optionally enable output from the AML Debug Object.
+ */
+u8 ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE);
+
+/*
+ * Optionally copy the entire DSDT to local memory (instead of simply
+ * mapping it.) There are some BIOSs that corrupt or replace the original
+ * DSDT, creating the need for this option. Default is FALSE, do not copy
+ * the DSDT.
+ */
+u8 ACPI_INIT_GLOBAL(acpi_gbl_copy_dsdt_locally, FALSE);
+
 /* acpi_gbl_FADT is a local copy of the FADT, converted to a common format. */
 
 struct acpi_table_fadt acpi_gbl_FADT;
@@ -145,11 +158,10 @@ ACPI_EXTERN u32 acpi_gbl_trace_dbg_layer;
  ****************************************************************************/
 
 /*
- * acpi_gbl_root_table_list is the master list of ACPI tables found in the
- * RSDT/XSDT.
- *
+ * acpi_gbl_root_table_list is the master list of ACPI tables that were
+ * found in the RSDT/XSDT.
  */
-ACPI_EXTERN struct acpi_internal_rsdt acpi_gbl_root_table_list;
+ACPI_EXTERN struct acpi_table_list acpi_gbl_root_table_list;
 ACPI_EXTERN struct acpi_table_facs *acpi_gbl_FACS;
 
 /* These addresses are calculated from the FADT Event Block addresses */
@@ -160,6 +172,11 @@ ACPI_EXTERN struct acpi_generic_address acpi_gbl_xpm1a_enable;
 ACPI_EXTERN struct acpi_generic_address acpi_gbl_xpm1b_status;
 ACPI_EXTERN struct acpi_generic_address acpi_gbl_xpm1b_enable;
 
+/* DSDT information. Used to check for DSDT corruption */
+
+ACPI_EXTERN struct acpi_table_header *acpi_gbl_DSDT;
+ACPI_EXTERN struct acpi_table_header acpi_gbl_original_dsdt_header;
+
 /*
  * Handle both ACPI 1.0 and ACPI 2.0 Integer widths. The integer width is
  * determined by the revision of the DSDT: If the DSDT revision is less than
diff --git a/drivers/acpi/acpica/acinterp.h b/drivers/acpi/acpica/acinterp.h
index 6df3f842816..049e203bd62 100644
--- a/drivers/acpi/acpica/acinterp.h
+++ b/drivers/acpi/acpica/acinterp.h
@@ -121,6 +121,13 @@ acpi_ex_convert_to_target_type(acpi_object_type destination_type,
 			       struct acpi_walk_state *walk_state);
 
 /*
+ * exdebug - AML debug object
+ */
+void
+acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
+			u32 level, u32 index);
+
+/*
  * exfield - ACPI AML (p-code) execution - field manipulation
  */
 acpi_status
@@ -274,7 +281,7 @@ acpi_status
 acpi_ex_system_do_notify_op(union acpi_operand_object *value,
 			    union acpi_operand_object *obj_desc);
 
-acpi_status acpi_ex_system_do_suspend(u64 time);
+acpi_status acpi_ex_system_do_sleep(u64 time);
 
 acpi_status acpi_ex_system_do_stall(u32 time);
 
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 24b8faa5c39..147a7e6bd38 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -213,12 +213,12 @@ struct acpi_namespace_node {
 #define ANOBJ_IS_BIT_OFFSET             0x40	/* i_aSL only: Reference is a bit offset */
 #define ANOBJ_IS_REFERENCED             0x80	/* i_aSL only: Object was referenced */
 
-/* One internal RSDT for table management */
+/* Internal ACPI table management - master table list */
 
-struct acpi_internal_rsdt {
-	struct acpi_table_desc *tables;
-	u32 count;
-	u32 size;
+struct acpi_table_list {
+	struct acpi_table_desc *tables;	/* Table descriptor array */
+	u32 current_table_count;	/* Tables currently in the array */
+	u32 max_table_count;	/* Max tables array will hold */
 	u8 flags;
 };
 
@@ -427,8 +427,8 @@ struct acpi_gpe_event_info {
 	struct acpi_gpe_register_info *register_info;	/* Backpointer to register info */
 	u8 flags;		/* Misc info about this GPE */
 	u8 gpe_number;		/* This GPE */
-	u8 runtime_count;
-	u8 wakeup_count;
+	u8 runtime_count;	/* References to a run GPE */
+	u8 wakeup_count;	/* References to a wake GPE */
 };
 
 /* Information about a GPE register pair, one per each status/enable pair in an array */
@@ -454,6 +454,7 @@ struct acpi_gpe_block_info {
 	struct acpi_gpe_event_info *event_info;	/* One for each GPE */
 	struct acpi_generic_address block_address;	/* Base address of the block */
 	u32 register_count;	/* Number of register pairs in block */
+	u16 gpe_count;		/* Number of individual GPEs in block */
 	u8 block_base_number;	/* Base GPE number for this block */
 };
 
@@ -469,6 +470,10 @@ struct acpi_gpe_xrupt_info {
 struct acpi_gpe_walk_info {
 	struct acpi_namespace_node *gpe_device;
 	struct acpi_gpe_block_info *gpe_block;
+	u16 count;
+	acpi_owner_id owner_id;
+	u8 enable_this_gpe;
+	u8 execute_by_owner_id;
 };
 
 struct acpi_gpe_device_info {
diff --git a/drivers/acpi/acpica/actables.h b/drivers/acpi/acpica/actables.h
index 8ff3b741df2..62a576e3436 100644
--- a/drivers/acpi/acpica/actables.h
+++ b/drivers/acpi/acpica/actables.h
@@ -107,6 +107,10 @@ u8 acpi_tb_checksum(u8 *buffer, u32 length);
 acpi_status
 acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length);
 
+void acpi_tb_check_dsdt_header(void);
+
+struct acpi_table_header *acpi_tb_copy_dsdt(u32 table_index);
+
 void
 acpi_tb_install_table(acpi_physical_address address,
 		      char *signature, u32 table_index);
diff --git a/drivers/acpi/acpica/dsfield.c b/drivers/acpi/acpica/dsfield.c
index bb13817e0c3..347bee1726f 100644
--- a/drivers/acpi/acpica/dsfield.c
+++ b/drivers/acpi/acpica/dsfield.c
@@ -323,7 +323,7 @@ acpi_ds_get_field_names(struct acpi_create_field_info *info,
 		default:
 
 			ACPI_ERROR((AE_INFO,
-				    "Invalid opcode in field list: %X",
+				    "Invalid opcode in field list: 0x%X",
 				    arg->common.aml_opcode));
 			return_ACPI_STATUS(AE_AML_BAD_OPCODE);
 		}
diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c
index 721039233aa..2a9a561c2f0 100644
--- a/drivers/acpi/acpica/dsmethod.c
+++ b/drivers/acpi/acpica/dsmethod.c
@@ -225,7 +225,7 @@ acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
 		    (walk_state->thread->current_sync_level >
 		     obj_desc->method.mutex->mutex.sync_level)) {
 			ACPI_ERROR((AE_INFO,
-				    "Cannot acquire Mutex for method [%4.4s], current SyncLevel is too large (%d)",
+				    "Cannot acquire Mutex for method [%4.4s], current SyncLevel is too large (%u)",
 				    acpi_ut_get_node_name(method_node),
 				    walk_state->thread->current_sync_level));
 
diff --git a/drivers/acpi/acpica/dsmthdat.c b/drivers/acpi/acpica/dsmthdat.c
index cc343b95954..f3d52f59250 100644
--- a/drivers/acpi/acpica/dsmthdat.c
+++ b/drivers/acpi/acpica/dsmthdat.c
@@ -262,7 +262,7 @@ acpi_ds_method_data_get_node(u8 type,
 
 		if (index > ACPI_METHOD_MAX_LOCAL) {
 			ACPI_ERROR((AE_INFO,
-				    "Local index %d is invalid (max %d)",
+				    "Local index %u is invalid (max %u)",
 				    index, ACPI_METHOD_MAX_LOCAL));
 			return_ACPI_STATUS(AE_AML_INVALID_INDEX);
 		}
@@ -276,7 +276,7 @@ acpi_ds_method_data_get_node(u8 type,
 
 		if (index > ACPI_METHOD_MAX_ARG) {
 			ACPI_ERROR((AE_INFO,
-				    "Arg index %d is invalid (max %d)",
+				    "Arg index %u is invalid (max %u)",
 				    index, ACPI_METHOD_MAX_ARG));
 			return_ACPI_STATUS(AE_AML_INVALID_INDEX);
 		}
@@ -287,7 +287,7 @@ acpi_ds_method_data_get_node(u8 type,
 		break;
 
 	default:
-		ACPI_ERROR((AE_INFO, "Type %d is invalid", type));
+		ACPI_ERROR((AE_INFO, "Type %u is invalid", type));
 		return_ACPI_STATUS(AE_TYPE);
 	}
 
@@ -424,7 +424,7 @@ acpi_ds_method_data_get_value(u8 type,
 			case ACPI_REFCLASS_ARG:
 
 				ACPI_ERROR((AE_INFO,
-					    "Uninitialized Arg[%d] at node %p",
+					    "Uninitialized Arg[%u] at node %p",
 					    index, node));
 
 				return_ACPI_STATUS(AE_AML_UNINITIALIZED_ARG);
@@ -440,7 +440,7 @@ acpi_ds_method_data_get_value(u8 type,
 			default:
 
 				ACPI_ERROR((AE_INFO,
-					    "Not a Arg/Local opcode: %X",
+					    "Not a Arg/Local opcode: 0x%X",
 					    type));
 				return_ACPI_STATUS(AE_AML_INTERNAL);
 			}
diff --git a/drivers/acpi/acpica/dsobject.c b/drivers/acpi/acpica/dsobject.c
index 891e08bf560..3607adcaf08 100644
--- a/drivers/acpi/acpica/dsobject.c
+++ b/drivers/acpi/acpica/dsobject.c
@@ -288,7 +288,7 @@ acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
 	if (byte_list) {
 		if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
 			ACPI_ERROR((AE_INFO,
-				    "Expecting bytelist, got AML opcode %X in op %p",
+				    "Expecting bytelist, found AML opcode 0x%X in op %p",
 				    byte_list->common.aml_opcode, byte_list));
 
 			acpi_ut_remove_reference(obj_desc);
@@ -511,7 +511,7 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
 		}
 
 		ACPI_INFO((AE_INFO,
-			   "Actual Package length (0x%X) is larger than NumElements field (0x%X), truncated\n",
+			   "Actual Package length (%u) is larger than NumElements field (%u), truncated\n",
 			   i, element_count));
 	} else if (i < element_count) {
 		/*
@@ -519,7 +519,7 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
 		 * Note: this is not an error, the package is padded out with NULLs.
 		 */
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-				  "Package List length (0x%X) smaller than NumElements count (0x%X), padded with null elements\n",
+				  "Package List length (%u) smaller than NumElements count (%u), padded with null elements\n",
 				  i, element_count));
 	}
 
@@ -701,7 +701,7 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
 			default:
 
 				ACPI_ERROR((AE_INFO,
-					    "Unknown constant opcode %X",
+					    "Unknown constant opcode 0x%X",
 					    opcode));
 				status = AE_AML_OPERAND_TYPE;
 				break;
@@ -717,7 +717,7 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
 			break;
 
 		default:
-			ACPI_ERROR((AE_INFO, "Unknown Integer type %X",
+			ACPI_ERROR((AE_INFO, "Unknown Integer type 0x%X",
 				    op_info->type));
 			status = AE_AML_OPERAND_TYPE;
 			break;
@@ -806,7 +806,7 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
 			default:
 
 				ACPI_ERROR((AE_INFO,
-					    "Unimplemented reference type for AML opcode: %4.4X",
+					    "Unimplemented reference type for AML opcode: 0x%4.4X",
 					    opcode));
 				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 			}
@@ -816,7 +816,7 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unimplemented data type: %X",
+		ACPI_ERROR((AE_INFO, "Unimplemented data type: 0x%X",
 			    obj_desc->common.type));
 
 		status = AE_AML_OPERAND_TYPE;
diff --git a/drivers/acpi/acpica/dsopcode.c b/drivers/acpi/acpica/dsopcode.c
index bf980cadb1e..53a7e416f33 100644
--- a/drivers/acpi/acpica/dsopcode.c
+++ b/drivers/acpi/acpica/dsopcode.c
@@ -292,7 +292,7 @@ acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc)
 	node = obj_desc->buffer.node;
 	if (!node) {
 		ACPI_ERROR((AE_INFO,
-			    "No pointer back to NS node in buffer obj %p",
+			    "No pointer back to namespace node in buffer object %p",
 			    obj_desc));
 		return_ACPI_STATUS(AE_AML_INTERNAL);
 	}
@@ -336,7 +336,7 @@ acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc)
 	node = obj_desc->package.node;
 	if (!node) {
 		ACPI_ERROR((AE_INFO,
-			    "No pointer back to NS node in package %p",
+			    "No pointer back to namespace node in package %p",
 			    obj_desc));
 		return_ACPI_STATUS(AE_AML_INTERNAL);
 	}
@@ -580,7 +580,8 @@ acpi_ds_init_buffer_field(u16 aml_opcode,
 	default:
 
 		ACPI_ERROR((AE_INFO,
-			    "Unknown field creation opcode %02x", aml_opcode));
+			    "Unknown field creation opcode 0x%02X",
+			    aml_opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
 	}
@@ -589,7 +590,7 @@ acpi_ds_init_buffer_field(u16 aml_opcode,
 
 	if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) {
 		ACPI_ERROR((AE_INFO,
-			    "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)",
+			    "Field [%4.4s] at %u exceeds Buffer [%4.4s] size %u (bits)",
 			    acpi_ut_get_node_name(result_desc),
 			    bit_offset + bit_count,
 			    acpi_ut_get_node_name(buffer_desc->buffer.node),
@@ -693,7 +694,7 @@ acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
 	status = acpi_ex_resolve_operands(op->common.aml_opcode,
 					  ACPI_WALK_OPERANDS, walk_state);
 	if (ACPI_FAILURE(status)) {
-		ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)",
+		ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",
 			    acpi_ps_get_opcode_name(op->common.aml_opcode),
 			    status));
 
@@ -1461,7 +1462,7 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state,
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p",
+		ACPI_ERROR((AE_INFO, "Unknown control opcode=0x%X Op=%p",
 			    op->common.aml_opcode, op));
 
 		status = AE_AML_BAD_OPCODE;
diff --git a/drivers/acpi/acpica/dswexec.c b/drivers/acpi/acpica/dswexec.c
index 6b76c486d78..d555b374e31 100644
--- a/drivers/acpi/acpica/dswexec.c
+++ b/drivers/acpi/acpica/dswexec.c
@@ -140,7 +140,7 @@ acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state,
 
 	if (local_obj_desc->common.type != ACPI_TYPE_INTEGER) {
 		ACPI_ERROR((AE_INFO,
-			    "Bad predicate (not an integer) ObjDesc=%p State=%p Type=%X",
+			    "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
 			    obj_desc, walk_state, obj_desc->common.type));
 
 		status = AE_AML_OPERAND_TYPE;
@@ -354,7 +354,7 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
 	op_class = walk_state->op_info->class;
 
 	if (op_class == AML_CLASS_UNKNOWN) {
-		ACPI_ERROR((AE_INFO, "Unknown opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown opcode 0x%X",
 			    op->common.aml_opcode));
 		return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 	}
@@ -678,7 +678,7 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
 		default:
 
 			ACPI_ERROR((AE_INFO,
-				    "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p",
+				    "Unimplemented opcode, class=0x%X type=0x%X Opcode=-0x%X Op=%p",
 				    op_class, op_type, op->common.aml_opcode,
 				    op));
 
diff --git a/drivers/acpi/acpica/dswstate.c b/drivers/acpi/acpica/dswstate.c
index 050df816416..83155dd8671 100644
--- a/drivers/acpi/acpica/dswstate.c
+++ b/drivers/acpi/acpica/dswstate.c
@@ -179,7 +179,7 @@ acpi_ds_result_push(union acpi_operand_object * object,
 
 	if (!object) {
 		ACPI_ERROR((AE_INFO,
-			    "Null Object! Obj=%p State=%p Num=%X",
+			    "Null Object! Obj=%p State=%p Num=%u",
 			    object, walk_state, walk_state->result_count));
 		return (AE_BAD_PARAMETER);
 	}
@@ -223,7 +223,7 @@ static acpi_status acpi_ds_result_stack_push(struct acpi_walk_state *walk_state)
 
 	if (((u32) walk_state->result_size + ACPI_RESULTS_FRAME_OBJ_NUM) >
 	    ACPI_RESULTS_OBJ_NUM_MAX) {
-		ACPI_ERROR((AE_INFO, "Result stack overflow: State=%p Num=%X",
+		ACPI_ERROR((AE_INFO, "Result stack overflow: State=%p Num=%u",
 			    walk_state, walk_state->result_size));
 		return (AE_STACK_OVERFLOW);
 	}
@@ -314,7 +314,7 @@ acpi_ds_obj_stack_push(void *object, struct acpi_walk_state * walk_state)
 
 	if (walk_state->num_operands >= ACPI_OBJ_NUM_OPERANDS) {
 		ACPI_ERROR((AE_INFO,
-			    "Object stack overflow! Obj=%p State=%p #Ops=%X",
+			    "Object stack overflow! Obj=%p State=%p #Ops=%u",
 			    object, walk_state, walk_state->num_operands));
 		return (AE_STACK_OVERFLOW);
 	}
@@ -365,7 +365,7 @@ acpi_ds_obj_stack_pop(u32 pop_count, struct acpi_walk_state * walk_state)
 
 		if (walk_state->num_operands == 0) {
 			ACPI_ERROR((AE_INFO,
-				    "Object stack underflow! Count=%X State=%p #Ops=%X",
+				    "Object stack underflow! Count=%X State=%p #Ops=%u",
 				    pop_count, walk_state,
 				    walk_state->num_operands));
 			return (AE_STACK_UNDERFLOW);
@@ -377,7 +377,7 @@ acpi_ds_obj_stack_pop(u32 pop_count, struct acpi_walk_state * walk_state)
 		walk_state->operands[walk_state->num_operands] = NULL;
 	}
 
-	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%u\n",
 			  pop_count, walk_state, walk_state->num_operands));
 
 	return (AE_OK);
diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c
index c1e6f472d43..f5795915a2e 100644
--- a/drivers/acpi/acpica/evevent.c
+++ b/drivers/acpi/acpica/evevent.c
@@ -302,7 +302,7 @@ static u32 acpi_ev_fixed_event_dispatch(u32 event)
 					      ACPI_DISABLE_EVENT);
 
 		ACPI_ERROR((AE_INFO,
-			    "No installed handler for fixed event [%08X]",
+			    "No installed handler for fixed event [0x%08X]",
 			    event));
 
 		return (ACPI_INTERRUPT_NOT_HANDLED);
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 78c55508aff..a221ad40416 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -60,7 +60,8 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Updates GPE register enable masks based on the GPE type
+ * DESCRIPTION: Updates GPE register enable masks based upon whether there are
+ *              references (either wake or run) to this GPE
  *
  ******************************************************************************/
 
@@ -81,14 +82,20 @@ acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info)
 	    (1 <<
 	     (gpe_event_info->gpe_number - gpe_register_info->base_gpe_number));
 
+	/* Clear the wake/run bits up front */
+
 	ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, register_bit);
 	ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
 
-	if (gpe_event_info->runtime_count)
+	/* Set the mask bits only if there are references to this GPE */
+
+	if (gpe_event_info->runtime_count) {
 		ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
+	}
 
-	if (gpe_event_info->wakeup_count)
+	if (gpe_event_info->wakeup_count) {
 		ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
+	}
 
 	return_ACPI_STATUS(AE_OK);
 }
@@ -101,7 +108,10 @@ acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info)
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Enable a GPE based on the GPE type
+ * DESCRIPTION: Hardware-enable a GPE. Always enables the GPE, regardless
+ *              of type or number of references.
+ *
+ * Note: The GPE lock should be already acquired when this function is called.
  *
  ******************************************************************************/
 
@@ -109,20 +119,36 @@ acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
 {
 	acpi_status status;
 
+
 	ACPI_FUNCTION_TRACE(ev_enable_gpe);
 
-	/* Make sure HW enable masks are updated */
+
+	/*
+	 * We will only allow a GPE to be enabled if it has either an
+	 * associated method (_Lxx/_Exx) or a handler. Otherwise, the
+	 * GPE will be immediately disabled by acpi_ev_gpe_dispatch the
+	 * first time it fires.
+	 */
+	if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)) {
+		return_ACPI_STATUS(AE_NO_HANDLER);
+	}
+
+	/* Ensure the HW enable masks are current */
 
 	status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
-	if (ACPI_FAILURE(status))
+	if (ACPI_FAILURE(status)) {
 		return_ACPI_STATUS(status);
+	}
+
+	/* Clear the GPE (of stale events) */
 
-	/* Clear the GPE (of stale events), then enable it */
 	status = acpi_hw_clear_gpe(gpe_event_info);
-	if (ACPI_FAILURE(status))
+	if (ACPI_FAILURE(status)) {
 		return_ACPI_STATUS(status);
+	}
 
 	/* Enable the requested GPE */
+
 	status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
 	return_ACPI_STATUS(status);
 }
@@ -135,7 +161,10 @@ acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Disable a GPE based on the GPE type
+ * DESCRIPTION: Hardware-disable a GPE. Always disables the requested GPE,
+ *              regardless of the type or number of references.
+ *
+ * Note: The GPE lock should be already acquired when this function is called.
  *
  ******************************************************************************/
 
@@ -145,24 +174,71 @@ acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
 
 	ACPI_FUNCTION_TRACE(ev_disable_gpe);
 
-	/* Make sure HW enable masks are updated */
+
+	/*
+	 * Note: Always disable the GPE, even if we think that that it is already
+	 * disabled. It is possible that the AML or some other code has enabled
+	 * the GPE behind our back.
+	 */
+
+	/* Ensure the HW enable masks are current */
 
 	status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
-	if (ACPI_FAILURE(status))
+	if (ACPI_FAILURE(status)) {
 		return_ACPI_STATUS(status);
+	}
 
 	/*
-	 * Even if we don't know the GPE type, make sure that we always
-	 * disable it. low_disable_gpe will just clear the enable bit for this
-	 * GPE and write it. It will not write out the current GPE enable mask,
-	 * since this may inadvertently enable GPEs too early, if a rogue GPE has
-	 * come in during ACPICA initialization - possibly as a result of AML or
-	 * other code that has enabled the GPE.
+	 * Always H/W disable this GPE, even if we don't know the GPE type.
+	 * Simply clear the enable bit for this particular GPE, but do not
+	 * write out the current GPE enable mask since this may inadvertently
+	 * enable GPEs too early. An example is a rogue GPE that has arrived
+	 * during ACPICA initialization - possibly because AML or other code
+	 * has enabled the GPE.
 	 */
 	status = acpi_hw_low_disable_gpe(gpe_event_info);
 	return_ACPI_STATUS(status);
 }
 
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_low_get_gpe_info
+ *
+ * PARAMETERS:  gpe_number          - Raw GPE number
+ *              gpe_block           - A GPE info block
+ *
+ * RETURN:      A GPE event_info struct. NULL if not a valid GPE (The gpe_number
+ *              is not within the specified GPE block)
+ *
+ * DESCRIPTION: Returns the event_info struct associated with this GPE. This is
+ *              the low-level implementation of ev_get_gpe_event_info.
+ *
+ ******************************************************************************/
+
+struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
+						     struct acpi_gpe_block_info
+						     *gpe_block)
+{
+	u32 gpe_index;
+
+	/*
+	 * Validate that the gpe_number is within the specified gpe_block.
+	 * (Two steps)
+	 */
+	if (!gpe_block || (gpe_number < gpe_block->block_base_number)) {
+		return (NULL);
+	}
+
+	gpe_index = gpe_number - gpe_block->block_base_number;
+	if (gpe_index >= gpe_block->gpe_count) {
+		return (NULL);
+	}
+
+	return (&gpe_block->event_info[gpe_index]);
+}
+
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_ev_get_gpe_event_info
@@ -184,29 +260,23 @@ struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
 						       u32 gpe_number)
 {
 	union acpi_operand_object *obj_desc;
-	struct acpi_gpe_block_info *gpe_block;
+	struct acpi_gpe_event_info *gpe_info;
 	u32 i;
 
 	ACPI_FUNCTION_ENTRY();
 
-	/* A NULL gpe_block means use the FADT-defined GPE block(s) */
+	/* A NULL gpe_device means use the FADT-defined GPE block(s) */
 
 	if (!gpe_device) {
 
 		/* Examine GPE Block 0 and 1 (These blocks are permanent) */
 
 		for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
-			gpe_block = acpi_gbl_gpe_fadt_blocks[i];
-			if (gpe_block) {
-				if ((gpe_number >= gpe_block->block_base_number)
-				    && (gpe_number <
-					gpe_block->block_base_number +
-					(gpe_block->register_count * 8))) {
-					return (&gpe_block->
-						event_info[gpe_number -
-							   gpe_block->
-							   block_base_number]);
-				}
+			gpe_info = acpi_ev_low_get_gpe_info(gpe_number,
+							    acpi_gbl_gpe_fadt_blocks
+							    [i]);
+			if (gpe_info) {
+				return (gpe_info);
 			}
 		}
 
@@ -223,16 +293,8 @@ struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
 		return (NULL);
 	}
 
-	gpe_block = obj_desc->device.gpe_block;
-
-	if ((gpe_number >= gpe_block->block_base_number) &&
-	    (gpe_number <
-	     gpe_block->block_base_number + (gpe_block->register_count * 8))) {
-		return (&gpe_block->
-			event_info[gpe_number - gpe_block->block_base_number]);
-	}
-
-	return (NULL);
+	return (acpi_ev_low_get_gpe_info
+		(gpe_number, obj_desc->device.gpe_block));
 }
 
 /*******************************************************************************
@@ -389,7 +451,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
 		return_VOID;
 	}
 
-	/* Set the GPE flags for return to enabled state */
+	/* Update the GPE register masks for return to enabled state */
 
 	(void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
 
@@ -499,7 +561,7 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
 		status = acpi_hw_clear_gpe(gpe_event_info);
 		if (ACPI_FAILURE(status)) {
 			ACPI_EXCEPTION((AE_INFO, status,
-					"Unable to clear GPE[%2X]",
+					"Unable to clear GPE[0x%2X]",
 					gpe_number));
 			return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
 		}
@@ -532,7 +594,7 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
 			status = acpi_hw_clear_gpe(gpe_event_info);
 			if (ACPI_FAILURE(status)) {
 				ACPI_EXCEPTION((AE_INFO, status,
-						"Unable to clear GPE[%2X]",
+					"Unable to clear GPE[0x%2X]",
 						gpe_number));
 				return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
 			}
@@ -548,7 +610,7 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
 		status = acpi_ev_disable_gpe(gpe_event_info);
 		if (ACPI_FAILURE(status)) {
 			ACPI_EXCEPTION((AE_INFO, status,
-					"Unable to disable GPE[%2X]",
+					"Unable to disable GPE[0x%2X]",
 					gpe_number));
 			return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
 		}
@@ -562,27 +624,30 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
 					 gpe_event_info);
 		if (ACPI_FAILURE(status)) {
 			ACPI_EXCEPTION((AE_INFO, status,
-					"Unable to queue handler for GPE[%2X] - event disabled",
+					"Unable to queue handler for GPE[0x%2X] - event disabled",
 					gpe_number));
 		}
 		break;
 
 	default:
 
-		/* No handler or method to run! */
-
+		/*
+		 * No handler or method to run!
+		 * 03/2010: This case should no longer be possible. We will not allow
+		 * a GPE to be enabled if it has no handler or method.
+		 */
 		ACPI_ERROR((AE_INFO,
-			    "No handler or method for GPE[%2X], disabling event",
+			    "No handler or method for GPE[0x%2X], disabling event",
 			    gpe_number));
 
 		/*
-		 * Disable the GPE. The GPE will remain disabled until the ACPICA
-		 * Core Subsystem is restarted, or a handler is installed.
+		 * Disable the GPE. The GPE will remain disabled a handler
+		 * is installed or ACPICA is restarted.
 		 */
 		status = acpi_ev_disable_gpe(gpe_event_info);
 		if (ACPI_FAILURE(status)) {
 			ACPI_EXCEPTION((AE_INFO, status,
-					"Unable to disable GPE[%2X]",
+					"Unable to disable GPE[0x%2X]",
 					gpe_number));
 			return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
 		}
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index fef721917ea..7c28f2d9fd3 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -51,20 +51,6 @@ ACPI_MODULE_NAME("evgpeblk")
 
 /* Local prototypes */
 static acpi_status
-acpi_ev_save_method_info(acpi_handle obj_handle,
-			 u32 level, void *obj_desc, void **return_value);
-
-static acpi_status
-acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
-			  u32 level, void *info, void **return_value);
-
-static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
-							       interrupt_number);
-
-static acpi_status
-acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
-
-static acpi_status
 acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
 			  u32 interrupt_number);
 
@@ -73,527 +59,6 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block);
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ev_valid_gpe_event
- *
- * PARAMETERS:  gpe_event_info              - Info for this GPE
- *
- * RETURN:      TRUE if the gpe_event is valid
- *
- * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
- *              Should be called only when the GPE lists are semaphore locked
- *              and not subject to change.
- *
- ******************************************************************************/
-
-u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
-{
-	struct acpi_gpe_xrupt_info *gpe_xrupt_block;
-	struct acpi_gpe_block_info *gpe_block;
-
-	ACPI_FUNCTION_ENTRY();
-
-	/* No need for spin lock since we are not changing any list elements */
-
-	/* Walk the GPE interrupt levels */
-
-	gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
-	while (gpe_xrupt_block) {
-		gpe_block = gpe_xrupt_block->gpe_block_list_head;
-
-		/* Walk the GPE blocks on this interrupt level */
-
-		while (gpe_block) {
-			if ((&gpe_block->event_info[0] <= gpe_event_info) &&
-			    (&gpe_block->event_info[((acpi_size)
-						     gpe_block->
-						     register_count) * 8] >
-			     gpe_event_info)) {
-				return (TRUE);
-			}
-
-			gpe_block = gpe_block->next;
-		}
-
-		gpe_xrupt_block = gpe_xrupt_block->next;
-	}
-
-	return (FALSE);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_walk_gpe_list
- *
- * PARAMETERS:  gpe_walk_callback   - Routine called for each GPE block
- *              Context             - Value passed to callback
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Walk the GPE lists.
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
-{
-	struct acpi_gpe_block_info *gpe_block;
-	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
-	acpi_status status = AE_OK;
-	acpi_cpu_flags flags;
-
-	ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
-
-	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
-
-	/* Walk the interrupt level descriptor list */
-
-	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
-	while (gpe_xrupt_info) {
-
-		/* Walk all Gpe Blocks attached to this interrupt level */
-
-		gpe_block = gpe_xrupt_info->gpe_block_list_head;
-		while (gpe_block) {
-
-			/* One callback per GPE block */
-
-			status =
-			    gpe_walk_callback(gpe_xrupt_info, gpe_block,
-					      context);
-			if (ACPI_FAILURE(status)) {
-				if (status == AE_CTRL_END) {	/* Callback abort */
-					status = AE_OK;
-				}
-				goto unlock_and_exit;
-			}
-
-			gpe_block = gpe_block->next;
-		}
-
-		gpe_xrupt_info = gpe_xrupt_info->next;
-	}
-
-      unlock_and_exit:
-	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
-	return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_delete_gpe_handlers
- *
- * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
- *              gpe_block           - Gpe Block info
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
- *              Used only prior to termination.
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
-			    struct acpi_gpe_block_info *gpe_block,
-			    void *context)
-{
-	struct acpi_gpe_event_info *gpe_event_info;
-	u32 i;
-	u32 j;
-
-	ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
-
-	/* Examine each GPE Register within the block */
-
-	for (i = 0; i < gpe_block->register_count; i++) {
-
-		/* Now look at the individual GPEs in this byte register */
-
-		for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
-			gpe_event_info = &gpe_block->event_info[((acpi_size) i *
-								 ACPI_GPE_REGISTER_WIDTH)
-								+ j];
-
-			if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-			    ACPI_GPE_DISPATCH_HANDLER) {
-				ACPI_FREE(gpe_event_info->dispatch.handler);
-				gpe_event_info->dispatch.handler = NULL;
-				gpe_event_info->flags &=
-				    ~ACPI_GPE_DISPATCH_MASK;
-			}
-		}
-	}
-
-	return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_save_method_info
- *
- * PARAMETERS:  Callback from walk_namespace
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
- *              control method under the _GPE portion of the namespace.
- *              Extract the name and GPE type from the object, saving this
- *              information for quick lookup during GPE dispatch
- *
- *              The name of each GPE control method is of the form:
- *              "_Lxx" or "_Exx"
- *              Where:
- *                  L      - means that the GPE is level triggered
- *                  E      - means that the GPE is edge triggered
- *                  xx     - is the GPE number [in HEX]
- *
- ******************************************************************************/
-
-static acpi_status
-acpi_ev_save_method_info(acpi_handle obj_handle,
-			 u32 level, void *obj_desc, void **return_value)
-{
-	struct acpi_gpe_block_info *gpe_block = (void *)obj_desc;
-	struct acpi_gpe_event_info *gpe_event_info;
-	u32 gpe_number;
-	char name[ACPI_NAME_SIZE + 1];
-	u8 type;
-
-	ACPI_FUNCTION_TRACE(ev_save_method_info);
-
-	/*
-	 * _Lxx and _Exx GPE method support
-	 *
-	 * 1) Extract the name from the object and convert to a string
-	 */
-	ACPI_MOVE_32_TO_32(name,
-			   &((struct acpi_namespace_node *)obj_handle)->name.
-			   integer);
-	name[ACPI_NAME_SIZE] = 0;
-
-	/*
-	 * 2) Edge/Level determination is based on the 2nd character
-	 *    of the method name
-	 *
-	 * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE
-	 * if a _PRW object is found that points to this GPE.
-	 */
-	switch (name[1]) {
-	case 'L':
-		type = ACPI_GPE_LEVEL_TRIGGERED;
-		break;
-
-	case 'E':
-		type = ACPI_GPE_EDGE_TRIGGERED;
-		break;
-
-	default:
-		/* Unknown method type, just ignore it! */
-
-		ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
-				  "Ignoring unknown GPE method type: %s "
-				  "(name not of form _Lxx or _Exx)", name));
-		return_ACPI_STATUS(AE_OK);
-	}
-
-	/* Convert the last two characters of the name to the GPE Number */
-
-	gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
-	if (gpe_number == ACPI_UINT32_MAX) {
-
-		/* Conversion failed; invalid method, just ignore it */
-
-		ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
-				  "Could not extract GPE number from name: %s "
-				  "(name is not of form _Lxx or _Exx)", name));
-		return_ACPI_STATUS(AE_OK);
-	}
-
-	/* Ensure that we have a valid GPE number for this GPE block */
-
-	if ((gpe_number < gpe_block->block_base_number) ||
-	    (gpe_number >= (gpe_block->block_base_number +
-			    (gpe_block->register_count * 8)))) {
-		/*
-		 * Not valid for this GPE block, just ignore it. However, it may be
-		 * valid for a different GPE block, since GPE0 and GPE1 methods both
-		 * appear under \_GPE.
-		 */
-		return_ACPI_STATUS(AE_OK);
-	}
-
-	/*
-	 * Now we can add this information to the gpe_event_info block for use
-	 * during dispatch of this GPE.
-	 */
-	gpe_event_info =
-	    &gpe_block->event_info[gpe_number - gpe_block->block_base_number];
-
-	gpe_event_info->flags = (u8) (type | ACPI_GPE_DISPATCH_METHOD);
-
-	gpe_event_info->dispatch.method_node =
-	    (struct acpi_namespace_node *)obj_handle;
-
-	ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
-			  "Registered GPE method %s as GPE number 0x%.2X\n",
-			  name, gpe_number));
-	return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_match_prw_and_gpe
- *
- * PARAMETERS:  Callback from walk_namespace
- *
- * RETURN:      Status. NOTE: We ignore errors so that the _PRW walk is
- *              not aborted on a single _PRW failure.
- *
- * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
- *              Device. Run the _PRW method. If present, extract the GPE
- *              number and mark the GPE as a WAKE GPE.
- *
- ******************************************************************************/
-
-static acpi_status
-acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
-			  u32 level, void *info, void **return_value)
-{
-	struct acpi_gpe_walk_info *gpe_info = (void *)info;
-	struct acpi_namespace_node *gpe_device;
-	struct acpi_gpe_block_info *gpe_block;
-	struct acpi_namespace_node *target_gpe_device;
-	struct acpi_gpe_event_info *gpe_event_info;
-	union acpi_operand_object *pkg_desc;
-	union acpi_operand_object *obj_desc;
-	u32 gpe_number;
-	acpi_status status;
-
-	ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
-
-	/* Check for a _PRW method under this device */
-
-	status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW,
-					 ACPI_BTYPE_PACKAGE, &pkg_desc);
-	if (ACPI_FAILURE(status)) {
-
-		/* Ignore all errors from _PRW, we don't want to abort the subsystem */
-
-		return_ACPI_STATUS(AE_OK);
-	}
-
-	/* The returned _PRW package must have at least two elements */
-
-	if (pkg_desc->package.count < 2) {
-		goto cleanup;
-	}
-
-	/* Extract pointers from the input context */
-
-	gpe_device = gpe_info->gpe_device;
-	gpe_block = gpe_info->gpe_block;
-
-	/*
-	 * The _PRW object must return a package, we are only interested in the
-	 * first element
-	 */
-	obj_desc = pkg_desc->package.elements[0];
-
-	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
-
-		/* Use FADT-defined GPE device (from definition of _PRW) */
-
-		target_gpe_device = acpi_gbl_fadt_gpe_device;
-
-		/* Integer is the GPE number in the FADT described GPE blocks */
-
-		gpe_number = (u32) obj_desc->integer.value;
-	} else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
-
-		/* Package contains a GPE reference and GPE number within a GPE block */
-
-		if ((obj_desc->package.count < 2) ||
-		    ((obj_desc->package.elements[0])->common.type !=
-		     ACPI_TYPE_LOCAL_REFERENCE) ||
-		    ((obj_desc->package.elements[1])->common.type !=
-		     ACPI_TYPE_INTEGER)) {
-			goto cleanup;
-		}
-
-		/* Get GPE block reference and decode */
-
-		target_gpe_device =
-		    obj_desc->package.elements[0]->reference.node;
-		gpe_number = (u32) obj_desc->package.elements[1]->integer.value;
-	} else {
-		/* Unknown type, just ignore it */
-
-		goto cleanup;
-	}
-
-	/*
-	 * Is this GPE within this block?
-	 *
-	 * TRUE if and only if these conditions are true:
-	 *     1) The GPE devices match.
-	 *     2) The GPE index(number) is within the range of the Gpe Block
-	 *          associated with the GPE device.
-	 */
-	if ((gpe_device == target_gpe_device) &&
-	    (gpe_number >= gpe_block->block_base_number) &&
-	    (gpe_number < gpe_block->block_base_number +
-	     (gpe_block->register_count * 8))) {
-		gpe_event_info = &gpe_block->event_info[gpe_number -
-							gpe_block->
-							block_base_number];
-
-		gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
-	}
-
-      cleanup:
-	acpi_ut_remove_reference(pkg_desc);
-	return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_get_gpe_xrupt_block
- *
- * PARAMETERS:  interrupt_number     - Interrupt for a GPE block
- *
- * RETURN:      A GPE interrupt block
- *
- * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
- *              block per unique interrupt level used for GPEs. Should be
- *              called only when the GPE lists are semaphore locked and not
- *              subject to change.
- *
- ******************************************************************************/
-
-static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
-							       interrupt_number)
-{
-	struct acpi_gpe_xrupt_info *next_gpe_xrupt;
-	struct acpi_gpe_xrupt_info *gpe_xrupt;
-	acpi_status status;
-	acpi_cpu_flags flags;
-
-	ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
-
-	/* No need for lock since we are not changing any list elements here */
-
-	next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
-	while (next_gpe_xrupt) {
-		if (next_gpe_xrupt->interrupt_number == interrupt_number) {
-			return_PTR(next_gpe_xrupt);
-		}
-
-		next_gpe_xrupt = next_gpe_xrupt->next;
-	}
-
-	/* Not found, must allocate a new xrupt descriptor */
-
-	gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
-	if (!gpe_xrupt) {
-		return_PTR(NULL);
-	}
-
-	gpe_xrupt->interrupt_number = interrupt_number;
-
-	/* Install new interrupt descriptor with spin lock */
-
-	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
-	if (acpi_gbl_gpe_xrupt_list_head) {
-		next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
-		while (next_gpe_xrupt->next) {
-			next_gpe_xrupt = next_gpe_xrupt->next;
-		}
-
-		next_gpe_xrupt->next = gpe_xrupt;
-		gpe_xrupt->previous = next_gpe_xrupt;
-	} else {
-		acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
-	}
-	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
-
-	/* Install new interrupt handler if not SCI_INT */
-
-	if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
-		status = acpi_os_install_interrupt_handler(interrupt_number,
-							   acpi_ev_gpe_xrupt_handler,
-							   gpe_xrupt);
-		if (ACPI_FAILURE(status)) {
-			ACPI_ERROR((AE_INFO,
-				    "Could not install GPE interrupt handler at level 0x%X",
-				    interrupt_number));
-			return_PTR(NULL);
-		}
-	}
-
-	return_PTR(gpe_xrupt);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_delete_gpe_xrupt
- *
- * PARAMETERS:  gpe_xrupt       - A GPE interrupt info block
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
- *              interrupt handler if not the SCI interrupt.
- *
- ******************************************************************************/
-
-static acpi_status
-acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
-{
-	acpi_status status;
-	acpi_cpu_flags flags;
-
-	ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
-
-	/* We never want to remove the SCI interrupt handler */
-
-	if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
-		gpe_xrupt->gpe_block_list_head = NULL;
-		return_ACPI_STATUS(AE_OK);
-	}
-
-	/* Disable this interrupt */
-
-	status =
-	    acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
-					     acpi_ev_gpe_xrupt_handler);
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
-	/* Unlink the interrupt block with lock */
-
-	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
-	if (gpe_xrupt->previous) {
-		gpe_xrupt->previous->next = gpe_xrupt->next;
-	} else {
-		/* No previous, update list head */
-
-		acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
-	}
-
-	if (gpe_xrupt->next) {
-		gpe_xrupt->next->previous = gpe_xrupt->previous;
-	}
-	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
-
-	/* Free the block */
-
-	ACPI_FREE(gpe_xrupt);
-	return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ev_install_gpe_block
  *
  * PARAMETERS:  gpe_block               - New GPE block
@@ -705,8 +170,7 @@ acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block)
 		acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 	}
 
-	acpi_current_gpe_count -=
-	    gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH;
+	acpi_current_gpe_count -= gpe_block->gpe_count;
 
 	/* Free the gpe_block */
 
@@ -760,9 +224,7 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
 	 * Allocate the GPE event_info block. There are eight distinct GPEs
 	 * per register. Initialization to zeros is sufficient.
 	 */
-	gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block->
-					       register_count *
-					       ACPI_GPE_REGISTER_WIDTH) *
+	gpe_event_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block->gpe_count *
 					      sizeof(struct
 						     acpi_gpe_event_info));
 	if (!gpe_event_info) {
@@ -880,6 +342,7 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
 {
 	acpi_status status;
 	struct acpi_gpe_block_info *gpe_block;
+	struct acpi_gpe_walk_info walk_info;
 
 	ACPI_FUNCTION_TRACE(ev_create_gpe_block);
 
@@ -897,6 +360,7 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
 	/* Initialize the new GPE block */
 
 	gpe_block->node = gpe_device;
+	gpe_block->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH);
 	gpe_block->register_count = register_count;
 	gpe_block->block_base_number = gpe_block_base_number;
 
@@ -921,12 +385,17 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
 		return_ACPI_STATUS(status);
 	}
 
-	/* Find all GPE methods (_Lxx, _Exx) for this block */
+	/* Find all GPE methods (_Lxx or_Exx) for this block */
+
+	walk_info.gpe_block = gpe_block;
+	walk_info.gpe_device = gpe_device;
+	walk_info.enable_this_gpe = FALSE;
+	walk_info.execute_by_owner_id = FALSE;
 
 	status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device,
 					ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
-					acpi_ev_save_method_info, NULL,
-					gpe_block, NULL);
+					acpi_ev_match_gpe_method, NULL,
+					&walk_info, NULL);
 
 	/* Return the new block */
 
@@ -938,14 +407,13 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
 			  "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
 			  (u32) gpe_block->block_base_number,
 			  (u32) (gpe_block->block_base_number +
-				 ((gpe_block->register_count *
-				   ACPI_GPE_REGISTER_WIDTH) - 1)),
+				(gpe_block->gpe_count - 1)),
 			  gpe_device->name.ascii, gpe_block->register_count,
 			  interrupt_number));
 
 	/* Update global count of currently available GPEs */
 
-	acpi_current_gpe_count += register_count * ACPI_GPE_REGISTER_WIDTH;
+	acpi_current_gpe_count += gpe_block->gpe_count;
 	return_ACPI_STATUS(AE_OK);
 }
 
@@ -969,10 +437,13 @@ acpi_status
 acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
 			     struct acpi_gpe_block_info *gpe_block)
 {
+	acpi_status status;
 	struct acpi_gpe_event_info *gpe_event_info;
-	struct acpi_gpe_walk_info gpe_info;
+	struct acpi_gpe_walk_info walk_info;
 	u32 wake_gpe_count;
 	u32 gpe_enabled_count;
+	u32 gpe_index;
+	u32 gpe_number;
 	u32 i;
 	u32 j;
 
@@ -995,210 +466,75 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
 		 * definition a wake GPE and will not be enabled while the machine
 		 * is running.
 		 */
-		gpe_info.gpe_block = gpe_block;
-		gpe_info.gpe_device = gpe_device;
+		walk_info.gpe_block = gpe_block;
+		walk_info.gpe_device = gpe_device;
+		walk_info.execute_by_owner_id = FALSE;
 
-		acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+		status =
+		    acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
 					   ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
 					   acpi_ev_match_prw_and_gpe, NULL,
-					   &gpe_info, NULL);
+					   &walk_info, NULL);
+		if (ACPI_FAILURE(status)) {
+			ACPI_EXCEPTION((AE_INFO, status,
+					"While executing _PRW methods"));
+		}
 	}
 
 	/*
-	 * Enable all GPEs that have a corresponding method and aren't
+	 * Enable all GPEs that have a corresponding method and are not
 	 * capable of generating wakeups. Any other GPEs within this block
-	 * must be enabled via the acpi_enable_gpe() interface.
+	 * must be enabled via the acpi_enable_gpe interface.
 	 */
 	wake_gpe_count = 0;
 	gpe_enabled_count = 0;
-	if (gpe_device == acpi_gbl_fadt_gpe_device)
+
+	if (gpe_device == acpi_gbl_fadt_gpe_device) {
 		gpe_device = NULL;
+	}
 
 	for (i = 0; i < gpe_block->register_count; i++) {
 		for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
-			acpi_status status;
-			acpi_size gpe_index;
-			int gpe_number;
 
 			/* Get the info block for this particular GPE */
-			gpe_index = (acpi_size)i * ACPI_GPE_REGISTER_WIDTH + j;
+
+			gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j;
 			gpe_event_info = &gpe_block->event_info[gpe_index];
 
 			if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) {
 				wake_gpe_count++;
-				if (acpi_gbl_leave_wake_gpes_disabled)
+				if (acpi_gbl_leave_wake_gpes_disabled) {
 					continue;
+				}
 			}
 
-			if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD))
+			/* Ignore GPEs that have no corresponding _Lxx/_Exx method */
+
+			if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) {
 				continue;
+			}
+
+			/* Enable this GPE */
 
 			gpe_number = gpe_index + gpe_block->block_base_number;
 			status = acpi_enable_gpe(gpe_device, gpe_number,
-						ACPI_GPE_TYPE_RUNTIME);
-			if (ACPI_FAILURE(status))
-				ACPI_ERROR((AE_INFO,
-						"Failed to enable GPE %02X\n",
-						gpe_number));
-			else
-				gpe_enabled_count++;
-		}
-	}
-
-	ACPI_DEBUG_PRINT((ACPI_DB_INIT,
-			  "Found %u Wake, Enabled %u Runtime GPEs in this block\n",
-			  wake_gpe_count, gpe_enabled_count));
-
-	return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_gpe_initialize
- *
- * PARAMETERS:  None
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Initialize the GPE data structures
- *
- ******************************************************************************/
-
-acpi_status acpi_ev_gpe_initialize(void)
-{
-	u32 register_count0 = 0;
-	u32 register_count1 = 0;
-	u32 gpe_number_max = 0;
-	acpi_status status;
-
-	ACPI_FUNCTION_TRACE(ev_gpe_initialize);
-
-	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
-	/*
-	 * Initialize the GPE Block(s) defined in the FADT
-	 *
-	 * Why the GPE register block lengths are divided by 2:  From the ACPI
-	 * Spec, section "General-Purpose Event Registers", we have:
-	 *
-	 * "Each register block contains two registers of equal length
-	 *  GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
-	 *  GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
-	 *  The length of the GPE1_STS and GPE1_EN registers is equal to
-	 *  half the GPE1_LEN. If a generic register block is not supported
-	 *  then its respective block pointer and block length values in the
-	 *  FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
-	 *  to be the same size."
-	 */
-
-	/*
-	 * Determine the maximum GPE number for this machine.
-	 *
-	 * Note: both GPE0 and GPE1 are optional, and either can exist without
-	 * the other.
-	 *
-	 * If EITHER the register length OR the block address are zero, then that
-	 * particular block is not supported.
-	 */
-	if (acpi_gbl_FADT.gpe0_block_length &&
-	    acpi_gbl_FADT.xgpe0_block.address) {
-
-		/* GPE block 0 exists (has both length and address > 0) */
-
-		register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2);
-
-		gpe_number_max =
-		    (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
-
-		/* Install GPE Block 0 */
-
-		status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
-						  &acpi_gbl_FADT.xgpe0_block,
-						  register_count0, 0,
-						  acpi_gbl_FADT.sci_interrupt,
-						  &acpi_gbl_gpe_fadt_blocks[0]);
-
-		if (ACPI_FAILURE(status)) {
-			ACPI_EXCEPTION((AE_INFO, status,
-					"Could not create GPE Block 0"));
-		}
-	}
-
-	if (acpi_gbl_FADT.gpe1_block_length &&
-	    acpi_gbl_FADT.xgpe1_block.address) {
-
-		/* GPE block 1 exists (has both length and address > 0) */
-
-		register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2);
-
-		/* Check for GPE0/GPE1 overlap (if both banks exist) */
-
-		if ((register_count0) &&
-		    (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
-			ACPI_ERROR((AE_INFO,
-				    "GPE0 block (GPE 0 to %d) overlaps the GPE1 block "
-				    "(GPE %d to %d) - Ignoring GPE1",
-				    gpe_number_max, acpi_gbl_FADT.gpe1_base,
-				    acpi_gbl_FADT.gpe1_base +
-				    ((register_count1 *
-				      ACPI_GPE_REGISTER_WIDTH) - 1)));
-
-			/* Ignore GPE1 block by setting the register count to zero */
-
-			register_count1 = 0;
-		} else {
-			/* Install GPE Block 1 */
-
-			status =
-			    acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
-						     &acpi_gbl_FADT.xgpe1_block,
-						     register_count1,
-						     acpi_gbl_FADT.gpe1_base,
-						     acpi_gbl_FADT.
-						     sci_interrupt,
-						     &acpi_gbl_gpe_fadt_blocks
-						     [1]);
-
+						 ACPI_GPE_TYPE_RUNTIME);
 			if (ACPI_FAILURE(status)) {
 				ACPI_EXCEPTION((AE_INFO, status,
-						"Could not create GPE Block 1"));
+						"Could not enable GPE 0x%02X",
+						gpe_number));
+				continue;
 			}
 
-			/*
-			 * GPE0 and GPE1 do not have to be contiguous in the GPE number
-			 * space. However, GPE0 always starts at GPE number zero.
-			 */
-			gpe_number_max = acpi_gbl_FADT.gpe1_base +
-			    ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
+			gpe_enabled_count++;
 		}
 	}
 
-	/* Exit if there are no GPE registers */
-
-	if ((register_count0 + register_count1) == 0) {
-
-		/* GPEs are not required by ACPI, this is OK */
-
+	if (gpe_enabled_count || wake_gpe_count) {
 		ACPI_DEBUG_PRINT((ACPI_DB_INIT,
-				  "There are no GPE blocks defined in the FADT\n"));
-		status = AE_OK;
-		goto cleanup;
-	}
-
-	/* Check for Max GPE number out-of-range */
-
-	if (gpe_number_max > ACPI_GPE_MAX) {
-		ACPI_ERROR((AE_INFO,
-			    "Maximum GPE number from FADT is too large: 0x%X",
-			    gpe_number_max));
-		status = AE_BAD_VALUE;
-		goto cleanup;
+				  "Enabled %u Runtime GPEs, added %u Wake GPEs in this block\n",
+				  gpe_enabled_count, wake_gpe_count));
 	}
 
-      cleanup:
-	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 	return_ACPI_STATUS(AE_OK);
 }
diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c
new file mode 100644
index 00000000000..3f6c2d26410
--- /dev/null
+++ b/drivers/acpi/acpica/evgpeinit.c
@@ -0,0 +1,653 @@
+/******************************************************************************
+ *
+ * Module Name: evgpeinit - System GPE initialization and update
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2010, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acevents.h"
+#include "acnamesp.h"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evgpeinit")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_gpe_initialize
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize the GPE data structures and the FADT GPE 0/1 blocks
+ *
+ ******************************************************************************/
+acpi_status acpi_ev_gpe_initialize(void)
+{
+	u32 register_count0 = 0;
+	u32 register_count1 = 0;
+	u32 gpe_number_max = 0;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ev_gpe_initialize);
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * Initialize the GPE Block(s) defined in the FADT
+	 *
+	 * Why the GPE register block lengths are divided by 2:  From the ACPI
+	 * Spec, section "General-Purpose Event Registers", we have:
+	 *
+	 * "Each register block contains two registers of equal length
+	 *  GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
+	 *  GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
+	 *  The length of the GPE1_STS and GPE1_EN registers is equal to
+	 *  half the GPE1_LEN. If a generic register block is not supported
+	 *  then its respective block pointer and block length values in the
+	 *  FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
+	 *  to be the same size."
+	 */
+
+	/*
+	 * Determine the maximum GPE number for this machine.
+	 *
+	 * Note: both GPE0 and GPE1 are optional, and either can exist without
+	 * the other.
+	 *
+	 * If EITHER the register length OR the block address are zero, then that
+	 * particular block is not supported.
+	 */
+	if (acpi_gbl_FADT.gpe0_block_length &&
+	    acpi_gbl_FADT.xgpe0_block.address) {
+
+		/* GPE block 0 exists (has both length and address > 0) */
+
+		register_count0 = (u16)(acpi_gbl_FADT.gpe0_block_length / 2);
+
+		gpe_number_max =
+		    (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
+
+		/* Install GPE Block 0 */
+
+		status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
+						  &acpi_gbl_FADT.xgpe0_block,
+						  register_count0, 0,
+						  acpi_gbl_FADT.sci_interrupt,
+						  &acpi_gbl_gpe_fadt_blocks[0]);
+
+		if (ACPI_FAILURE(status)) {
+			ACPI_EXCEPTION((AE_INFO, status,
+					"Could not create GPE Block 0"));
+		}
+	}
+
+	if (acpi_gbl_FADT.gpe1_block_length &&
+	    acpi_gbl_FADT.xgpe1_block.address) {
+
+		/* GPE block 1 exists (has both length and address > 0) */
+
+		register_count1 = (u16)(acpi_gbl_FADT.gpe1_block_length / 2);
+
+		/* Check for GPE0/GPE1 overlap (if both banks exist) */
+
+		if ((register_count0) &&
+		    (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
+			ACPI_ERROR((AE_INFO,
+				    "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
+				    "(GPE %u to %u) - Ignoring GPE1",
+				    gpe_number_max, acpi_gbl_FADT.gpe1_base,
+				    acpi_gbl_FADT.gpe1_base +
+				    ((register_count1 *
+				      ACPI_GPE_REGISTER_WIDTH) - 1)));
+
+			/* Ignore GPE1 block by setting the register count to zero */
+
+			register_count1 = 0;
+		} else {
+			/* Install GPE Block 1 */
+
+			status =
+			    acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
+						     &acpi_gbl_FADT.xgpe1_block,
+						     register_count1,
+						     acpi_gbl_FADT.gpe1_base,
+						     acpi_gbl_FADT.
+						     sci_interrupt,
+						     &acpi_gbl_gpe_fadt_blocks
+						     [1]);
+
+			if (ACPI_FAILURE(status)) {
+				ACPI_EXCEPTION((AE_INFO, status,
+						"Could not create GPE Block 1"));
+			}
+
+			/*
+			 * GPE0 and GPE1 do not have to be contiguous in the GPE number
+			 * space. However, GPE0 always starts at GPE number zero.
+			 */
+			gpe_number_max = acpi_gbl_FADT.gpe1_base +
+			    ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
+		}
+	}
+
+	/* Exit if there are no GPE registers */
+
+	if ((register_count0 + register_count1) == 0) {
+
+		/* GPEs are not required by ACPI, this is OK */
+
+		ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+				  "There are no GPE blocks defined in the FADT\n"));
+		status = AE_OK;
+		goto cleanup;
+	}
+
+	/* Check for Max GPE number out-of-range */
+
+	if (gpe_number_max > ACPI_GPE_MAX) {
+		ACPI_ERROR((AE_INFO,
+			    "Maximum GPE number from FADT is too large: 0x%X",
+			    gpe_number_max));
+		status = AE_BAD_VALUE;
+		goto cleanup;
+	}
+
+      cleanup:
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_update_gpes
+ *
+ * PARAMETERS:  table_owner_id      - ID of the newly-loaded ACPI table
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
+ *              result of a Load() or load_table() operation. If new GPE
+ *              methods have been installed, register the new methods and
+ *              enable and runtime GPEs that are associated with them. Also,
+ *              run any newly loaded _PRW methods in order to discover any
+ *              new CAN_WAKE GPEs.
+ *
+ ******************************************************************************/
+
+void acpi_ev_update_gpes(acpi_owner_id table_owner_id)
+{
+	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
+	struct acpi_gpe_block_info *gpe_block;
+	struct acpi_gpe_walk_info walk_info;
+	acpi_status status = AE_OK;
+	u32 new_wake_gpe_count = 0;
+
+	/* We will examine only _PRW/_Lxx/_Exx methods owned by this table */
+
+	walk_info.owner_id = table_owner_id;
+	walk_info.execute_by_owner_id = TRUE;
+	walk_info.count = 0;
+
+	if (acpi_gbl_leave_wake_gpes_disabled) {
+		/*
+		 * 1) Run any newly-loaded _PRW methods to find any GPEs that
+		 * can now be marked as CAN_WAKE GPEs. Note: We must run the
+		 * _PRW methods before we process the _Lxx/_Exx methods because
+		 * we will enable all runtime GPEs associated with the new
+		 * _Lxx/_Exx methods at the time we process those methods.
+		 *
+		 * Unlock interpreter so that we can run the _PRW methods.
+		 */
+		walk_info.gpe_block = NULL;
+		walk_info.gpe_device = NULL;
+
+		acpi_ex_exit_interpreter();
+
+		status =
+		    acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+					   ACPI_UINT32_MAX,
+					   ACPI_NS_WALK_NO_UNLOCK,
+					   acpi_ev_match_prw_and_gpe, NULL,
+					   &walk_info, NULL);
+		if (ACPI_FAILURE(status)) {
+			ACPI_EXCEPTION((AE_INFO, status,
+					"While executing _PRW methods"));
+		}
+
+		acpi_ex_enter_interpreter();
+		new_wake_gpe_count = walk_info.count;
+	}
+
+	/*
+	 * 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
+	 *
+	 * Any GPEs that correspond to new _Lxx/_Exx methods and are not
+	 * marked as CAN_WAKE are immediately enabled.
+	 *
+	 * Examine the namespace underneath each gpe_device within the
+	 * gpe_block lists.
+	 */
+	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+	if (ACPI_FAILURE(status)) {
+		return;
+	}
+
+	walk_info.count = 0;
+	walk_info.enable_this_gpe = TRUE;
+
+	/* Walk the interrupt level descriptor list */
+
+	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
+	while (gpe_xrupt_info) {
+
+		/* Walk all Gpe Blocks attached to this interrupt level */
+
+		gpe_block = gpe_xrupt_info->gpe_block_list_head;
+		while (gpe_block) {
+			walk_info.gpe_block = gpe_block;
+			walk_info.gpe_device = gpe_block->node;
+
+			status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD,
+							walk_info.gpe_device,
+							ACPI_UINT32_MAX,
+							ACPI_NS_WALK_NO_UNLOCK,
+							acpi_ev_match_gpe_method,
+							NULL, &walk_info, NULL);
+			if (ACPI_FAILURE(status)) {
+				ACPI_EXCEPTION((AE_INFO, status,
+						"While decoding _Lxx/_Exx methods"));
+			}
+
+			gpe_block = gpe_block->next;
+		}
+
+		gpe_xrupt_info = gpe_xrupt_info->next;
+	}
+
+	if (walk_info.count || new_wake_gpe_count) {
+		ACPI_INFO((AE_INFO,
+			   "Enabled %u new runtime GPEs, added %u new wakeup GPEs",
+			   walk_info.count, new_wake_gpe_count));
+	}
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+	return;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_match_gpe_method
+ *
+ * PARAMETERS:  Callback from walk_namespace
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
+ *              control method under the _GPE portion of the namespace.
+ *              Extract the name and GPE type from the object, saving this
+ *              information for quick lookup during GPE dispatch. Allows a
+ *              per-owner_id evaluation if execute_by_owner_id is TRUE in the
+ *              walk_info parameter block.
+ *
+ *              The name of each GPE control method is of the form:
+ *              "_Lxx" or "_Exx", where:
+ *                  L      - means that the GPE is level triggered
+ *                  E      - means that the GPE is edge triggered
+ *                  xx     - is the GPE number [in HEX]
+ *
+ * If walk_info->execute_by_owner_id is TRUE, we only execute examine GPE methods
+ *    with that owner.
+ * If walk_info->enable_this_gpe is TRUE, the GPE that is referred to by a GPE
+ *    method is immediately enabled (Used for Load/load_table operators)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_match_gpe_method(acpi_handle obj_handle,
+			 u32 level, void *context, void **return_value)
+{
+	struct acpi_namespace_node *method_node =
+	    ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
+	struct acpi_gpe_walk_info *walk_info =
+	    ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
+	struct acpi_gpe_event_info *gpe_event_info;
+	struct acpi_namespace_node *gpe_device;
+	acpi_status status;
+	u32 gpe_number;
+	char name[ACPI_NAME_SIZE + 1];
+	u8 type;
+
+	ACPI_FUNCTION_TRACE(ev_match_gpe_method);
+
+	/* Check if requested owner_id matches this owner_id */
+
+	if ((walk_info->execute_by_owner_id) &&
+	    (method_node->owner_id != walk_info->owner_id)) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/*
+	 * Match and decode the _Lxx and _Exx GPE method names
+	 *
+	 * 1) Extract the method name and null terminate it
+	 */
+	ACPI_MOVE_32_TO_32(name, &method_node->name.integer);
+	name[ACPI_NAME_SIZE] = 0;
+
+	/* 2) Name must begin with an underscore */
+
+	if (name[0] != '_') {
+		return_ACPI_STATUS(AE_OK);	/* Ignore this method */
+	}
+
+	/*
+	 * 3) Edge/Level determination is based on the 2nd character
+	 *    of the method name
+	 *
+	 * NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is
+	 * found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set.
+	 */
+	switch (name[1]) {
+	case 'L':
+		type = ACPI_GPE_LEVEL_TRIGGERED;
+		break;
+
+	case 'E':
+		type = ACPI_GPE_EDGE_TRIGGERED;
+		break;
+
+	default:
+		/* Unknown method type, just ignore it */
+
+		ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+				  "Ignoring unknown GPE method type: %s "
+				  "(name not of form _Lxx or _Exx)", name));
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* 4) The last two characters of the name are the hex GPE Number */
+
+	gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
+	if (gpe_number == ACPI_UINT32_MAX) {
+
+		/* Conversion failed; invalid method, just ignore it */
+
+		ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+				  "Could not extract GPE number from name: %s "
+				  "(name is not of form _Lxx or _Exx)", name));
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Ensure that we have a valid GPE number for this GPE block */
+
+	gpe_event_info =
+	    acpi_ev_low_get_gpe_info(gpe_number, walk_info->gpe_block);
+	if (!gpe_event_info) {
+		/*
+		 * This gpe_number is not valid for this GPE block, just ignore it.
+		 * However, it may be valid for a different GPE block, since GPE0
+		 * and GPE1 methods both appear under \_GPE.
+		 */
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+	    ACPI_GPE_DISPATCH_HANDLER) {
+
+		/* If there is already a handler, ignore this GPE method */
+
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+	    ACPI_GPE_DISPATCH_METHOD) {
+		/*
+		 * If there is already a method, ignore this method. But check
+		 * for a type mismatch (if both the _Lxx AND _Exx exist)
+		 */
+		if (type != (gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
+			ACPI_ERROR((AE_INFO,
+				    "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
+				    gpe_number, gpe_number, gpe_number));
+		}
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/*
+	 * Add the GPE information from above to the gpe_event_info block for
+	 * use during dispatch of this GPE.
+	 */
+	gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_METHOD);
+	gpe_event_info->dispatch.method_node = method_node;
+
+	/*
+	 * Enable this GPE if requested. This only happens when during the
+	 * execution of a Load or load_table operator. We have found a new
+	 * GPE method and want to immediately enable the GPE if it is a
+	 * runtime GPE.
+	 */
+	if (walk_info->enable_this_gpe) {
+
+		/* Ignore GPEs that can wake the system */
+
+		if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE) ||
+		    !acpi_gbl_leave_wake_gpes_disabled) {
+			walk_info->count++;
+			gpe_device = walk_info->gpe_device;
+
+			if (gpe_device == acpi_gbl_fadt_gpe_device) {
+				gpe_device = NULL;
+			}
+
+			status = acpi_enable_gpe(gpe_device, gpe_number,
+						 ACPI_GPE_TYPE_RUNTIME);
+			if (ACPI_FAILURE(status)) {
+				ACPI_EXCEPTION((AE_INFO, status,
+						"Could not enable GPE 0x%02X",
+						gpe_number));
+			}
+		}
+	}
+
+	ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+			  "Registered GPE method %s as GPE number 0x%.2X\n",
+			  name, gpe_number));
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_match_prw_and_gpe
+ *
+ * PARAMETERS:  Callback from walk_namespace
+ *
+ * RETURN:      Status. NOTE: We ignore errors so that the _PRW walk is
+ *              not aborted on a single _PRW failure.
+ *
+ * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
+ *              Device. Run the _PRW method. If present, extract the GPE
+ *              number and mark the GPE as a CAN_WAKE GPE. Allows a
+ *              per-owner_id execution if execute_by_owner_id is TRUE in the
+ *              walk_info parameter block.
+ *
+ * If walk_info->execute_by_owner_id is TRUE, we only execute _PRWs with that
+ *    owner.
+ * If walk_info->gpe_device is NULL, we execute every _PRW found. Otherwise,
+ *    we only execute _PRWs that refer to the input gpe_device.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
+			  u32 level, void *context, void **return_value)
+{
+	struct acpi_gpe_walk_info *walk_info =
+	    ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
+	struct acpi_namespace_node *gpe_device;
+	struct acpi_gpe_block_info *gpe_block;
+	struct acpi_namespace_node *target_gpe_device;
+	struct acpi_namespace_node *prw_node;
+	struct acpi_gpe_event_info *gpe_event_info;
+	union acpi_operand_object *pkg_desc;
+	union acpi_operand_object *obj_desc;
+	u32 gpe_number;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
+
+	/* Check for a _PRW method under this device */
+
+	status = acpi_ns_get_node(obj_handle, METHOD_NAME__PRW,
+				  ACPI_NS_NO_UPSEARCH, &prw_node);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Check if requested owner_id matches this owner_id */
+
+	if ((walk_info->execute_by_owner_id) &&
+	    (prw_node->owner_id != walk_info->owner_id)) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Execute the _PRW */
+
+	status = acpi_ut_evaluate_object(prw_node, NULL,
+					 ACPI_BTYPE_PACKAGE, &pkg_desc);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* The returned _PRW package must have at least two elements */
+
+	if (pkg_desc->package.count < 2) {
+		goto cleanup;
+	}
+
+	/* Extract pointers from the input context */
+
+	gpe_device = walk_info->gpe_device;
+	gpe_block = walk_info->gpe_block;
+
+	/*
+	 * The _PRW object must return a package, we are only interested
+	 * in the first element
+	 */
+	obj_desc = pkg_desc->package.elements[0];
+
+	if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
+
+		/* Use FADT-defined GPE device (from definition of _PRW) */
+
+		target_gpe_device = NULL;
+		if (gpe_device) {
+			target_gpe_device = acpi_gbl_fadt_gpe_device;
+		}
+
+		/* Integer is the GPE number in the FADT described GPE blocks */
+
+		gpe_number = (u32)obj_desc->integer.value;
+	} else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
+
+		/* Package contains a GPE reference and GPE number within a GPE block */
+
+		if ((obj_desc->package.count < 2) ||
+		    ((obj_desc->package.elements[0])->common.type !=
+		     ACPI_TYPE_LOCAL_REFERENCE) ||
+		    ((obj_desc->package.elements[1])->common.type !=
+		     ACPI_TYPE_INTEGER)) {
+			goto cleanup;
+		}
+
+		/* Get GPE block reference and decode */
+
+		target_gpe_device =
+		    obj_desc->package.elements[0]->reference.node;
+		gpe_number = (u32)obj_desc->package.elements[1]->integer.value;
+	} else {
+		/* Unknown type, just ignore it */
+
+		goto cleanup;
+	}
+
+	/* Get the gpe_event_info for this GPE */
+
+	if (gpe_device) {
+		/*
+		 * Is this GPE within this block?
+		 *
+		 * TRUE if and only if these conditions are true:
+		 *     1) The GPE devices match.
+		 *     2) The GPE index(number) is within the range of the Gpe Block
+		 *          associated with the GPE device.
+		 */
+		if (gpe_device != target_gpe_device) {
+			goto cleanup;
+		}
+
+		gpe_event_info =
+		    acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
+	} else {
+		/* gpe_device is NULL, just match the target_device and gpe_number */
+
+		gpe_event_info =
+		    acpi_ev_get_gpe_event_info(target_gpe_device, gpe_number);
+	}
+
+	if (gpe_event_info) {
+		if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
+
+			/* This GPE can wake the system */
+
+			gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
+			walk_info->count++;
+		}
+	}
+
+      cleanup:
+	acpi_ut_remove_reference(pkg_desc);
+	return_ACPI_STATUS(AE_OK);
+}
diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c
new file mode 100644
index 00000000000..19a0e513ea4
--- /dev/null
+++ b/drivers/acpi/acpica/evgpeutil.c
@@ -0,0 +1,337 @@
+/******************************************************************************
+ *
+ * Module Name: evgpeutil - GPE utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2010, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acevents.h"
+
+#define _COMPONENT          ACPI_EVENTS
+ACPI_MODULE_NAME("evgpeutil")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_walk_gpe_list
+ *
+ * PARAMETERS:  gpe_walk_callback   - Routine called for each GPE block
+ *              Context             - Value passed to callback
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Walk the GPE lists.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
+{
+	struct acpi_gpe_block_info *gpe_block;
+	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
+	acpi_status status = AE_OK;
+	acpi_cpu_flags flags;
+
+	ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+	/* Walk the interrupt level descriptor list */
+
+	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
+	while (gpe_xrupt_info) {
+
+		/* Walk all Gpe Blocks attached to this interrupt level */
+
+		gpe_block = gpe_xrupt_info->gpe_block_list_head;
+		while (gpe_block) {
+
+			/* One callback per GPE block */
+
+			status =
+			    gpe_walk_callback(gpe_xrupt_info, gpe_block,
+					      context);
+			if (ACPI_FAILURE(status)) {
+				if (status == AE_CTRL_END) {	/* Callback abort */
+					status = AE_OK;
+				}
+				goto unlock_and_exit;
+			}
+
+			gpe_block = gpe_block->next;
+		}
+
+		gpe_xrupt_info = gpe_xrupt_info->next;
+	}
+
+      unlock_and_exit:
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_valid_gpe_event
+ *
+ * PARAMETERS:  gpe_event_info              - Info for this GPE
+ *
+ * RETURN:      TRUE if the gpe_event is valid
+ *
+ * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
+ *              Should be called only when the GPE lists are semaphore locked
+ *              and not subject to change.
+ *
+ ******************************************************************************/
+
+u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
+{
+	struct acpi_gpe_xrupt_info *gpe_xrupt_block;
+	struct acpi_gpe_block_info *gpe_block;
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* No need for spin lock since we are not changing any list elements */
+
+	/* Walk the GPE interrupt levels */
+
+	gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
+	while (gpe_xrupt_block) {
+		gpe_block = gpe_xrupt_block->gpe_block_list_head;
+
+		/* Walk the GPE blocks on this interrupt level */
+
+		while (gpe_block) {
+			if ((&gpe_block->event_info[0] <= gpe_event_info) &&
+			    (&gpe_block->event_info[gpe_block->gpe_count] >
+			     gpe_event_info)) {
+				return (TRUE);
+			}
+
+			gpe_block = gpe_block->next;
+		}
+
+		gpe_xrupt_block = gpe_xrupt_block->next;
+	}
+
+	return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_get_gpe_xrupt_block
+ *
+ * PARAMETERS:  interrupt_number     - Interrupt for a GPE block
+ *
+ * RETURN:      A GPE interrupt block
+ *
+ * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
+ *              block per unique interrupt level used for GPEs. Should be
+ *              called only when the GPE lists are semaphore locked and not
+ *              subject to change.
+ *
+ ******************************************************************************/
+
+struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number)
+{
+	struct acpi_gpe_xrupt_info *next_gpe_xrupt;
+	struct acpi_gpe_xrupt_info *gpe_xrupt;
+	acpi_status status;
+	acpi_cpu_flags flags;
+
+	ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
+
+	/* No need for lock since we are not changing any list elements here */
+
+	next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
+	while (next_gpe_xrupt) {
+		if (next_gpe_xrupt->interrupt_number == interrupt_number) {
+			return_PTR(next_gpe_xrupt);
+		}
+
+		next_gpe_xrupt = next_gpe_xrupt->next;
+	}
+
+	/* Not found, must allocate a new xrupt descriptor */
+
+	gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
+	if (!gpe_xrupt) {
+		return_PTR(NULL);
+	}
+
+	gpe_xrupt->interrupt_number = interrupt_number;
+
+	/* Install new interrupt descriptor with spin lock */
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+	if (acpi_gbl_gpe_xrupt_list_head) {
+		next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
+		while (next_gpe_xrupt->next) {
+			next_gpe_xrupt = next_gpe_xrupt->next;
+		}
+
+		next_gpe_xrupt->next = gpe_xrupt;
+		gpe_xrupt->previous = next_gpe_xrupt;
+	} else {
+		acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
+	}
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+	/* Install new interrupt handler if not SCI_INT */
+
+	if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
+		status = acpi_os_install_interrupt_handler(interrupt_number,
+							   acpi_ev_gpe_xrupt_handler,
+							   gpe_xrupt);
+		if (ACPI_FAILURE(status)) {
+			ACPI_ERROR((AE_INFO,
+				    "Could not install GPE interrupt handler at level 0x%X",
+				    interrupt_number));
+			return_PTR(NULL);
+		}
+	}
+
+	return_PTR(gpe_xrupt);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_delete_gpe_xrupt
+ *
+ * PARAMETERS:  gpe_xrupt       - A GPE interrupt info block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
+ *              interrupt handler if not the SCI interrupt.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
+{
+	acpi_status status;
+	acpi_cpu_flags flags;
+
+	ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
+
+	/* We never want to remove the SCI interrupt handler */
+
+	if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
+		gpe_xrupt->gpe_block_list_head = NULL;
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Disable this interrupt */
+
+	status =
+	    acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
+					     acpi_ev_gpe_xrupt_handler);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Unlink the interrupt block with lock */
+
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+	if (gpe_xrupt->previous) {
+		gpe_xrupt->previous->next = gpe_xrupt->next;
+	} else {
+		/* No previous, update list head */
+
+		acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
+	}
+
+	if (gpe_xrupt->next) {
+		gpe_xrupt->next->previous = gpe_xrupt->previous;
+	}
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+	/* Free the block */
+
+	ACPI_FREE(gpe_xrupt);
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_delete_gpe_handlers
+ *
+ * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
+ *              Used only prior to termination.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
+			    struct acpi_gpe_block_info *gpe_block,
+			    void *context)
+{
+	struct acpi_gpe_event_info *gpe_event_info;
+	u32 i;
+	u32 j;
+
+	ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
+
+	/* Examine each GPE Register within the block */
+
+	for (i = 0; i < gpe_block->register_count; i++) {
+
+		/* Now look at the individual GPEs in this byte register */
+
+		for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
+			gpe_event_info = &gpe_block->event_info[((acpi_size) i *
+								 ACPI_GPE_REGISTER_WIDTH)
+								+ j];
+
+			if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+			    ACPI_GPE_DISPATCH_HANDLER) {
+				ACPI_FREE(gpe_event_info->dispatch.handler);
+				gpe_event_info->dispatch.handler = NULL;
+				gpe_event_info->flags &=
+				    ~ACPI_GPE_DISPATCH_MASK;
+			}
+		}
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
diff --git a/drivers/acpi/acpica/evmisc.c b/drivers/acpi/acpica/evmisc.c
index 9a3cb7045a3..df0aea9a8cf 100644
--- a/drivers/acpi/acpica/evmisc.c
+++ b/drivers/acpi/acpica/evmisc.c
@@ -590,7 +590,7 @@ void acpi_ev_terminate(void)
 			status = acpi_disable_event(i, 0);
 			if (ACPI_FAILURE(status)) {
 				ACPI_ERROR((AE_INFO,
-					    "Could not disable fixed event %d",
+					    "Could not disable fixed event %u",
 					    (u32) i));
 			}
 		}
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
index b40757955f9..cc825023012 100644
--- a/drivers/acpi/acpica/evxface.c
+++ b/drivers/acpi/acpica/evxface.c
@@ -142,7 +142,7 @@ acpi_install_fixed_event_handler(u32 event,
 	if (ACPI_SUCCESS(status))
 		status = acpi_enable_event(event, 0);
 	if (ACPI_FAILURE(status)) {
-		ACPI_WARNING((AE_INFO, "Could not enable fixed event %X",
+		ACPI_WARNING((AE_INFO, "Could not enable fixed event 0x%X",
 			      event));
 
 		/* Remove the handler */
@@ -203,7 +203,7 @@ acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler)
 
 	if (ACPI_FAILURE(status)) {
 		ACPI_WARNING((AE_INFO,
-			      "Could not write to fixed event enable register %X",
+			      "Could not write to fixed event enable register 0x%X",
 			      event));
 	} else {
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabled fixed event %X\n",
@@ -682,14 +682,13 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 
 	/* Parameter validation */
 
-	if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) {
-		status = AE_BAD_PARAMETER;
-		goto exit;
+	if ((!address) || (type & ~ACPI_GPE_XRUPT_TYPE_MASK)) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
 	}
 
 	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
 	if (ACPI_FAILURE(status)) {
-		goto exit;
+		return_ACPI_STATUS(status);
 	}
 
 	/* Ensure that we have a valid GPE number */
@@ -720,6 +719,13 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 	handler->context = context;
 	handler->method_node = gpe_event_info->dispatch.method_node;
 
+	/* Disable the GPE before installing the handler */
+
+	status = acpi_ev_disable_gpe(gpe_event_info);
+	if (ACPI_FAILURE (status)) {
+		goto unlock_and_exit;
+	}
+
 	/* Install the handler */
 
 	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
@@ -733,12 +739,8 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 
 	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 
-      unlock_and_exit:
+unlock_and_exit:
 	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-      exit:
-	if (ACPI_FAILURE(status))
-		ACPI_EXCEPTION((AE_INFO, status,
-				"Installing notify handler failed"));
 	return_ACPI_STATUS(status);
 }
 
diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
index 5ff32c78ea2..d5a5efc043b 100644
--- a/drivers/acpi/acpica/evxfevnt.c
+++ b/drivers/acpi/acpica/evxfevnt.c
@@ -69,7 +69,7 @@ acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
 
 acpi_status acpi_enable(void)
 {
-	acpi_status status = AE_OK;
+	acpi_status status;
 
 	ACPI_FUNCTION_TRACE(acpi_enable);
 
@@ -84,21 +84,30 @@ acpi_status acpi_enable(void)
 	if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
 		ACPI_DEBUG_PRINT((ACPI_DB_INIT,
 				  "System is already in ACPI mode\n"));
-	} else {
-		/* Transition to ACPI mode */
+		return_ACPI_STATUS(AE_OK);
+	}
 
-		status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI);
-		if (ACPI_FAILURE(status)) {
-			ACPI_ERROR((AE_INFO,
-				    "Could not transition to ACPI mode"));
-			return_ACPI_STATUS(status);
-		}
+	/* Transition to ACPI mode */
 
-		ACPI_DEBUG_PRINT((ACPI_DB_INIT,
-				  "Transition to ACPI mode successful\n"));
+	status = acpi_hw_set_mode(ACPI_SYS_MODE_ACPI);
+	if (ACPI_FAILURE(status)) {
+		ACPI_ERROR((AE_INFO,
+			    "Could not transition to ACPI mode"));
+		return_ACPI_STATUS(status);
 	}
 
-	return_ACPI_STATUS(status);
+	/* Sanity check that transition succeeded */
+
+	if (acpi_hw_get_mode() != ACPI_SYS_MODE_ACPI) {
+		ACPI_ERROR((AE_INFO,
+			    "Hardware did not enter ACPI mode"));
+		return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
+	}
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+			  "Transition to ACPI mode successful\n"));
+
+	return_ACPI_STATUS(AE_OK);
 }
 
 ACPI_EXPORT_SYMBOL(acpi_enable)
@@ -203,21 +212,26 @@ ACPI_EXPORT_SYMBOL(acpi_enable_event)
  *
  * FUNCTION:    acpi_set_gpe
  *
- * PARAMETERS:  gpe_device      - Parent GPE Device
+ * PARAMETERS:  gpe_device      - Parent GPE Device. NULL for GPE0/GPE1
  *              gpe_number      - GPE level within the GPE block
- *              action          - Enable or disable
- *                                Called from ISR or not
+ *              action          - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Enable or disable an ACPI event (general purpose)
+ * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
+ *              the reference count mechanism used in the acpi_enable_gpe and
+ *              acpi_disable_gpe interfaces -- and should be used with care.
+ *
+ * Note: Typically used to disable a runtime GPE for short period of time,
+ * then re-enable it, without disturbing the existing reference counts. This
+ * is useful, for example, in the Embedded Controller (EC) driver.
  *
  ******************************************************************************/
 acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
 {
-	acpi_status status = AE_OK;
-	acpi_cpu_flags flags;
 	struct acpi_gpe_event_info *gpe_event_info;
+	acpi_status status;
+	acpi_cpu_flags flags;
 
 	ACPI_FUNCTION_TRACE(acpi_set_gpe);
 
@@ -243,7 +257,6 @@ acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
 		break;
 
 	default:
-		ACPI_ERROR((AE_INFO, "Invalid action\n"));
 		status = AE_BAD_PARAMETER;
 		break;
 	}
@@ -259,25 +272,31 @@ ACPI_EXPORT_SYMBOL(acpi_set_gpe)
  *
  * FUNCTION:    acpi_enable_gpe
  *
- * PARAMETERS:  gpe_device      - Parent GPE Device
+ * PARAMETERS:  gpe_device      - Parent GPE Device. NULL for GPE0/GPE1
  *              gpe_number      - GPE level within the GPE block
- *              type            - Purpose the GPE will be used for
+ *              gpe_type        - ACPI_GPE_TYPE_RUNTIME or ACPI_GPE_TYPE_WAKE
+ *                                or both
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Take a reference to a GPE and enable it if necessary
+ * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
+ *              hardware-enabled (for runtime GPEs), or the GPE register mask
+ *              is updated (for wake GPEs).
  *
  ******************************************************************************/
-acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
+acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type)
 {
 	acpi_status status = AE_OK;
-	acpi_cpu_flags flags;
 	struct acpi_gpe_event_info *gpe_event_info;
+	acpi_cpu_flags flags;
 
 	ACPI_FUNCTION_TRACE(acpi_enable_gpe);
 
-	if (type & ~ACPI_GPE_TYPE_WAKE_RUN)
+	/* Parameter validation */
+
+	if (!gpe_type || (gpe_type & ~ACPI_GPE_TYPE_WAKE_RUN)) {
 		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
 
 	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
 
@@ -289,26 +308,43 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
 		goto unlock_and_exit;
 	}
 
-	if (type & ACPI_GPE_TYPE_RUNTIME) {
-		if (++gpe_event_info->runtime_count == 1) {
+	if (gpe_type & ACPI_GPE_TYPE_RUNTIME) {
+		if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) {
+			status = AE_LIMIT;	/* Too many references */
+			goto unlock_and_exit;
+		}
+
+		gpe_event_info->runtime_count++;
+		if (gpe_event_info->runtime_count == 1) {
 			status = acpi_ev_enable_gpe(gpe_event_info);
-			if (ACPI_FAILURE(status))
+			if (ACPI_FAILURE(status)) {
 				gpe_event_info->runtime_count--;
+				goto unlock_and_exit;
+			}
 		}
 	}
 
-	if (type & ACPI_GPE_TYPE_WAKE) {
+	if (gpe_type & ACPI_GPE_TYPE_WAKE) {
+		/* The GPE must have the ability to wake the system */
+
 		if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
-			status = AE_BAD_PARAMETER;
+			status = AE_TYPE;
+			goto unlock_and_exit;
+		}
+
+		if (gpe_event_info->wakeup_count == ACPI_UINT8_MAX) {
+			status = AE_LIMIT;	/* Too many references */
 			goto unlock_and_exit;
 		}
 
 		/*
-		 * Wake-up GPEs are only enabled right prior to putting the
-		 * system into a sleep state.
+		 * Update the enable mask on the first wakeup reference. Wake GPEs
+		 * are only hardware-enabled just before sleeping.
 		 */
-		if (++gpe_event_info->wakeup_count == 1)
-			acpi_ev_update_gpe_enable_masks(gpe_event_info);
+		gpe_event_info->wakeup_count++;
+		if (gpe_event_info->wakeup_count == 1) {
+			(void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
+		}
 	}
 
 unlock_and_exit:
@@ -321,27 +357,34 @@ ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
  *
  * FUNCTION:    acpi_disable_gpe
  *
- * PARAMETERS:  gpe_device      - Parent GPE Device
+ * PARAMETERS:  gpe_device      - Parent GPE Device. NULL for GPE0/GPE1
  *              gpe_number      - GPE level within the GPE block
- *              type            - Purpose the GPE won't be used for any more
+ *              gpe_type        - ACPI_GPE_TYPE_RUNTIME or ACPI_GPE_TYPE_WAKE
+ *                                or both
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Release a reference to a GPE and disable it if necessary
+ * DESCRIPTION: Remove a reference to a GPE. When the last reference is
+ *              removed, only then is the GPE disabled (for runtime GPEs), or
+ *              the GPE mask bit disabled (for wake GPEs)
  *
  ******************************************************************************/
-acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
+acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type)
 {
 	acpi_status status = AE_OK;
-	acpi_cpu_flags flags;
 	struct acpi_gpe_event_info *gpe_event_info;
+	acpi_cpu_flags flags;
 
 	ACPI_FUNCTION_TRACE(acpi_disable_gpe);
 
-	if (type & ~ACPI_GPE_TYPE_WAKE_RUN)
+	/* Parameter validation */
+
+	if (!gpe_type || (gpe_type & ~ACPI_GPE_TYPE_WAKE_RUN)) {
 		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
 
 	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
 	/* Ensure that we have a valid GPE number */
 
 	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
@@ -350,18 +393,39 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
 		goto unlock_and_exit;
 	}
 
-	if ((type & ACPI_GPE_TYPE_RUNTIME) && gpe_event_info->runtime_count) {
-		if (--gpe_event_info->runtime_count == 0)
+	/* Hardware-disable a runtime GPE on removal of the last reference */
+
+	if (gpe_type & ACPI_GPE_TYPE_RUNTIME) {
+		if (!gpe_event_info->runtime_count) {
+			status = AE_LIMIT;	/* There are no references to remove */
+			goto unlock_and_exit;
+		}
+
+		gpe_event_info->runtime_count--;
+		if (!gpe_event_info->runtime_count) {
 			status = acpi_ev_disable_gpe(gpe_event_info);
+			if (ACPI_FAILURE(status)) {
+				gpe_event_info->runtime_count++;
+				goto unlock_and_exit;
+			}
+		}
 	}
 
-	if ((type & ACPI_GPE_TYPE_WAKE) && gpe_event_info->wakeup_count) {
-		/*
-		 * Wake-up GPEs are not enabled after leaving system sleep
-		 * states, so we don't need to disable them here.
-		 */
-		if (--gpe_event_info->wakeup_count == 0)
-			acpi_ev_update_gpe_enable_masks(gpe_event_info);
+	/*
+	 * Update masks for wake GPE on removal of the last reference.
+	 * No need to hardware-disable wake GPEs here, they are not currently
+	 * enabled.
+	 */
+	if (gpe_type & ACPI_GPE_TYPE_WAKE) {
+		if (!gpe_event_info->wakeup_count) {
+			status = AE_LIMIT;	/* There are no references to remove */
+			goto unlock_and_exit;
+		}
+
+		gpe_event_info->wakeup_count--;
+		if (!gpe_event_info->wakeup_count) {
+			(void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
+		}
 	}
 
 unlock_and_exit:
@@ -465,30 +529,23 @@ ACPI_EXPORT_SYMBOL(acpi_clear_event)
  *
  * FUNCTION:    acpi_clear_gpe
  *
- * PARAMETERS:  gpe_device      - Parent GPE Device
+ * PARAMETERS:  gpe_device      - Parent GPE Device. NULL for GPE0/GPE1
  *              gpe_number      - GPE level within the GPE block
- *              Flags           - Called from an ISR or not
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Clear an ACPI event (general purpose)
  *
  ******************************************************************************/
-acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
+acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
 {
 	acpi_status status = AE_OK;
 	struct acpi_gpe_event_info *gpe_event_info;
+	acpi_cpu_flags flags;
 
 	ACPI_FUNCTION_TRACE(acpi_clear_gpe);
 
-	/* Use semaphore lock if not executing at interrupt level */
-
-	if (flags & ACPI_NOT_ISR) {
-		status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-		if (ACPI_FAILURE(status)) {
-			return_ACPI_STATUS(status);
-		}
-	}
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
 
 	/* Ensure that we have a valid GPE number */
 
@@ -501,9 +558,7 @@ acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
 	status = acpi_hw_clear_gpe(gpe_event_info);
 
       unlock_and_exit:
-	if (flags & ACPI_NOT_ISR) {
-		(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-	}
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 	return_ACPI_STATUS(status);
 }
 
@@ -569,9 +624,8 @@ ACPI_EXPORT_SYMBOL(acpi_get_event_status)
  *
  * FUNCTION:    acpi_get_gpe_status
  *
- * PARAMETERS:  gpe_device      - Parent GPE Device
+ * PARAMETERS:  gpe_device      - Parent GPE Device. NULL for GPE0/GPE1
  *              gpe_number      - GPE level within the GPE block
- *              Flags           - Called from an ISR or not
  *              event_status    - Where the current status of the event will
  *                                be returned
  *
@@ -582,21 +636,15 @@ ACPI_EXPORT_SYMBOL(acpi_get_event_status)
  ******************************************************************************/
 acpi_status
 acpi_get_gpe_status(acpi_handle gpe_device,
-		    u32 gpe_number, u32 flags, acpi_event_status * event_status)
+		    u32 gpe_number, acpi_event_status *event_status)
 {
 	acpi_status status = AE_OK;
 	struct acpi_gpe_event_info *gpe_event_info;
+	acpi_cpu_flags flags;
 
 	ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
 
-	/* Use semaphore lock if not executing at interrupt level */
-
-	if (flags & ACPI_NOT_ISR) {
-		status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-		if (ACPI_FAILURE(status)) {
-			return_ACPI_STATUS(status);
-		}
-	}
+	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
 
 	/* Ensure that we have a valid GPE number */
 
@@ -614,9 +662,7 @@ acpi_get_gpe_status(acpi_handle gpe_device,
 		*event_status |= ACPI_EVENT_FLAG_HANDLE;
 
       unlock_and_exit:
-	if (flags & ACPI_NOT_ISR) {
-		(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-	}
+	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 	return_ACPI_STATUS(status);
 }
 
@@ -673,20 +719,15 @@ acpi_install_gpe_block(acpi_handle gpe_device,
 		goto unlock_and_exit;
 	}
 
-	/* Run the _PRW methods and enable the GPEs */
-
-	status = acpi_ev_initialize_gpe_block(node, gpe_block);
-	if (ACPI_FAILURE(status)) {
-		goto unlock_and_exit;
-	}
-
-	/* Get the device_object attached to the node */
+	/* Install block in the device_object attached to the node */
 
 	obj_desc = acpi_ns_get_attached_object(node);
 	if (!obj_desc) {
 
-		/* No object, create a new one */
-
+		/*
+		 * No object, create a new one (Device nodes do not always have
+		 * an attached object)
+		 */
 		obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
 		if (!obj_desc) {
 			status = AE_NO_MEMORY;
@@ -705,10 +746,14 @@ acpi_install_gpe_block(acpi_handle gpe_device,
 		}
 	}
 
-	/* Install the GPE block in the device_object */
+	/* Now install the GPE block in the device_object */
 
 	obj_desc->device.gpe_block = gpe_block;
 
+	/* Run the _PRW methods and enable the runtime GPEs in the new block */
+
+	status = acpi_ev_initialize_gpe_block(node, gpe_block);
+
       unlock_and_exit:
 	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 	return_ACPI_STATUS(status);
@@ -839,8 +884,7 @@ acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
 
 	/* Increment Index by the number of GPEs in this block */
 
-	info->next_block_base_index +=
-	    (gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH);
+	info->next_block_base_index += gpe_block->gpe_count;
 
 	if (info->index < info->next_block_base_index) {
 		/*
diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c
index 7e8b3bedc37..008621c5ad8 100644
--- a/drivers/acpi/acpica/exconfig.c
+++ b/drivers/acpi/acpica/exconfig.c
@@ -82,8 +82,9 @@ acpi_ex_add_table(u32 table_index,
 		  struct acpi_namespace_node *parent_node,
 		  union acpi_operand_object **ddb_handle)
 {
-	acpi_status status;
 	union acpi_operand_object *obj_desc;
+	acpi_status status;
+	acpi_owner_id owner_id;
 
 	ACPI_FUNCTION_TRACE(ex_add_table);
 
@@ -119,7 +120,14 @@ acpi_ex_add_table(u32 table_index,
 	acpi_ns_exec_module_code_list();
 	acpi_ex_enter_interpreter();
 
-	return_ACPI_STATUS(status);
+	/* Update GPEs for any new _PRW or _Lxx/_Exx methods. Ignore errors */
+
+	status = acpi_tb_get_owner_id(table_index, &owner_id);
+	if (ACPI_SUCCESS(status)) {
+		acpi_ev_update_gpes(owner_id);
+	}
+
+	return_ACPI_STATUS(AE_OK);
 }
 
 /*******************************************************************************
@@ -248,10 +256,8 @@ acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
 
 	status = acpi_get_table_by_index(table_index, &table);
 	if (ACPI_SUCCESS(status)) {
-		ACPI_INFO((AE_INFO,
-			   "Dynamic OEM Table Load - [%.4s] OemId [%.6s] OemTableId [%.8s]",
-			   table->signature, table->oem_id,
-			   table->oem_table_id));
+		ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
+		acpi_tb_print_table_header(0, table);
 	}
 
 	/* Invoke table handler if present */
@@ -525,6 +531,9 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
 		return_ACPI_STATUS(status);
 	}
 
+	ACPI_INFO((AE_INFO, "Dynamic OEM Table Load:"));
+	acpi_tb_print_table_header(0, table_desc.pointer);
+
 	/* Remove the reference by added by acpi_ex_store above */
 
 	acpi_ut_remove_reference(ddb_handle);
diff --git a/drivers/acpi/acpica/exconvrt.c b/drivers/acpi/acpica/exconvrt.c
index bda7aed0404..b73bc50c5b7 100644
--- a/drivers/acpi/acpica/exconvrt.c
+++ b/drivers/acpi/acpica/exconvrt.c
@@ -650,7 +650,7 @@ acpi_ex_convert_to_target_type(acpi_object_type destination_type,
 
 		default:
 			ACPI_ERROR((AE_INFO,
-				    "Bad destination type during conversion: %X",
+				    "Bad destination type during conversion: 0x%X",
 				    destination_type));
 			status = AE_AML_INTERNAL;
 			break;
@@ -665,7 +665,7 @@ acpi_ex_convert_to_target_type(acpi_object_type destination_type,
 
 	default:
 		ACPI_ERROR((AE_INFO,
-			    "Unknown Target type ID 0x%X AmlOpcode %X DestType %s",
+			    "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s",
 			    GET_CURRENT_ARG_TYPE(walk_state->op_info->
 						 runtime_args),
 			    walk_state->opcode,
diff --git a/drivers/acpi/acpica/excreate.c b/drivers/acpi/acpica/excreate.c
index 0aa57d93869..3c61b48c73f 100644
--- a/drivers/acpi/acpica/excreate.c
+++ b/drivers/acpi/acpica/excreate.c
@@ -306,12 +306,12 @@ acpi_ex_create_region(u8 * aml_start,
 	 */
 	if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) &&
 	    (region_space < ACPI_USER_REGION_BEGIN)) {
-		ACPI_ERROR((AE_INFO, "Invalid AddressSpace type %X",
+		ACPI_ERROR((AE_INFO, "Invalid AddressSpace type 0x%X",
 			    region_space));
 		return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
 	}
 
-	ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (%X)\n",
+	ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
 			  acpi_ut_get_region_name(region_space), region_space));
 
 	/* Create the region descriptor */
diff --git a/drivers/acpi/acpica/exdebug.c b/drivers/acpi/acpica/exdebug.c
new file mode 100644
index 00000000000..be8c98b480d
--- /dev/null
+++ b/drivers/acpi/acpica/exdebug.c
@@ -0,0 +1,261 @@
+/******************************************************************************
+ *
+ * Module Name: exdebug - Support for stores to the AML Debug Object
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2010, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exdebug")
+
+#ifndef ACPI_NO_ERROR_MESSAGES
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_do_debug_object
+ *
+ * PARAMETERS:  source_desc         - Object to be output to "Debug Object"
+ *              Level               - Indentation level (used for packages)
+ *              Index               - Current package element, zero if not pkg
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Handles stores to the AML Debug Object. For example:
+ *              Store(INT1, Debug)
+ *
+ * This function is not compiled if ACPI_NO_ERROR_MESSAGES is set.
+ *
+ * This function is only enabled if acpi_gbl_enable_aml_debug_object is set, or
+ * if ACPI_LV_DEBUG_OBJECT is set in the acpi_dbg_level. Thus, in the normal
+ * operational case, stores to the debug object are ignored but can be easily
+ * enabled if necessary.
+ *
+ ******************************************************************************/
+void
+acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
+			u32 level, u32 index)
+{
+	u32 i;
+
+	ACPI_FUNCTION_TRACE_PTR(ex_do_debug_object, source_desc);
+
+	/* Output must be enabled via the debug_object global or the dbg_level */
+
+	if (!acpi_gbl_enable_aml_debug_object &&
+	    !(acpi_dbg_level & ACPI_LV_DEBUG_OBJECT)) {
+		return_VOID;
+	}
+
+	/*
+	 * Print line header as long as we are not in the middle of an
+	 * object display
+	 */
+	if (!((level > 0) && index == 0)) {
+		acpi_os_printf("[ACPI Debug] %*s", level, " ");
+	}
+
+	/* Display the index for package output only */
+
+	if (index > 0) {
+		acpi_os_printf("(%.2u) ", index - 1);
+	}
+
+	if (!source_desc) {
+		acpi_os_printf("[Null Object]\n");
+		return_VOID;
+	}
+
+	if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) {
+		acpi_os_printf("%s ",
+			       acpi_ut_get_object_type_name(source_desc));
+
+		if (!acpi_ut_valid_internal_object(source_desc)) {
+			acpi_os_printf("%p, Invalid Internal Object!\n",
+				       source_desc);
+			return_VOID;
+		}
+	} else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) ==
+		   ACPI_DESC_TYPE_NAMED) {
+		acpi_os_printf("%s: %p\n",
+			       acpi_ut_get_type_name(((struct
+						       acpi_namespace_node *)
+						      source_desc)->type),
+			       source_desc);
+		return_VOID;
+	} else {
+		return_VOID;
+	}
+
+	/* source_desc is of type ACPI_DESC_TYPE_OPERAND */
+
+	switch (source_desc->common.type) {
+	case ACPI_TYPE_INTEGER:
+
+		/* Output correct integer width */
+
+		if (acpi_gbl_integer_byte_width == 4) {
+			acpi_os_printf("0x%8.8X\n",
+				       (u32)source_desc->integer.value);
+		} else {
+			acpi_os_printf("0x%8.8X%8.8X\n",
+				       ACPI_FORMAT_UINT64(source_desc->integer.
+							  value));
+		}
+		break;
+
+	case ACPI_TYPE_BUFFER:
+
+		acpi_os_printf("[0x%.2X]\n", (u32)source_desc->buffer.length);
+		acpi_ut_dump_buffer2(source_desc->buffer.pointer,
+				     (source_desc->buffer.length < 256) ?
+				     source_desc->buffer.length : 256,
+				     DB_BYTE_DISPLAY);
+		break;
+
+	case ACPI_TYPE_STRING:
+
+		acpi_os_printf("[0x%.2X] \"%s\"\n",
+			       source_desc->string.length,
+			       source_desc->string.pointer);
+		break;
+
+	case ACPI_TYPE_PACKAGE:
+
+		acpi_os_printf("[Contains 0x%.2X Elements]\n",
+			       source_desc->package.count);
+
+		/* Output the entire contents of the package */
+
+		for (i = 0; i < source_desc->package.count; i++) {
+			acpi_ex_do_debug_object(source_desc->package.
+						elements[i], level + 4, i + 1);
+		}
+		break;
+
+	case ACPI_TYPE_LOCAL_REFERENCE:
+
+		acpi_os_printf("[%s] ",
+			       acpi_ut_get_reference_name(source_desc));
+
+		/* Decode the reference */
+
+		switch (source_desc->reference.class) {
+		case ACPI_REFCLASS_INDEX:
+
+			acpi_os_printf("0x%X\n", source_desc->reference.value);
+			break;
+
+		case ACPI_REFCLASS_TABLE:
+
+			/* Case for ddb_handle */
+
+			acpi_os_printf("Table Index 0x%X\n",
+				       source_desc->reference.value);
+			return;
+
+		default:
+			break;
+		}
+
+		acpi_os_printf(" ");
+
+		/* Check for valid node first, then valid object */
+
+		if (source_desc->reference.node) {
+			if (ACPI_GET_DESCRIPTOR_TYPE
+			    (source_desc->reference.node) !=
+			    ACPI_DESC_TYPE_NAMED) {
+				acpi_os_printf
+				    (" %p - Not a valid namespace node\n",
+				     source_desc->reference.node);
+			} else {
+				acpi_os_printf("Node %p [%4.4s] ",
+					       source_desc->reference.node,
+					       (source_desc->reference.node)->
+					       name.ascii);
+
+				switch ((source_desc->reference.node)->type) {
+
+					/* These types have no attached object */
+
+				case ACPI_TYPE_DEVICE:
+					acpi_os_printf("Device\n");
+					break;
+
+				case ACPI_TYPE_THERMAL:
+					acpi_os_printf("Thermal Zone\n");
+					break;
+
+				default:
+					acpi_ex_do_debug_object((source_desc->
+								 reference.
+								 node)->object,
+								level + 4, 0);
+					break;
+				}
+			}
+		} else if (source_desc->reference.object) {
+			if (ACPI_GET_DESCRIPTOR_TYPE
+			    (source_desc->reference.object) ==
+			    ACPI_DESC_TYPE_NAMED) {
+				acpi_ex_do_debug_object(((struct
+							  acpi_namespace_node *)
+							 source_desc->reference.
+							 object)->object,
+							level + 4, 0);
+			} else {
+				acpi_ex_do_debug_object(source_desc->reference.
+							object, level + 4, 0);
+			}
+		}
+		break;
+
+	default:
+
+		acpi_os_printf("%p\n", source_desc);
+		break;
+	}
+
+	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n"));
+	return_VOID;
+}
+#endif
diff --git a/drivers/acpi/acpica/exfield.c b/drivers/acpi/acpica/exfield.c
index 6c79fecbee4..f17d2ff0031 100644
--- a/drivers/acpi/acpica/exfield.c
+++ b/drivers/acpi/acpica/exfield.c
@@ -281,7 +281,7 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
 
 		if (source_desc->buffer.length < length) {
 			ACPI_ERROR((AE_INFO,
-				    "SMBus or IPMI write requires Buffer of length %X, found length %X",
+				    "SMBus or IPMI write requires Buffer of length %u, found length %u",
 				    length, source_desc->buffer.length));
 
 			return_ACPI_STATUS(AE_AML_BUFFER_LIMIT);
diff --git a/drivers/acpi/acpica/exfldio.c b/drivers/acpi/acpica/exfldio.c
index f68a216168b..a6dc26f0b3b 100644
--- a/drivers/acpi/acpica/exfldio.c
+++ b/drivers/acpi/acpica/exfldio.c
@@ -94,7 +94,7 @@ acpi_ex_setup_region(union acpi_operand_object *obj_desc,
 	/* We must have a valid region */
 
 	if (rgn_desc->common.type != ACPI_TYPE_REGION) {
-		ACPI_ERROR((AE_INFO, "Needed Region, found type %X (%s)",
+		ACPI_ERROR((AE_INFO, "Needed Region, found type 0x%X (%s)",
 			    rgn_desc->common.type,
 			    acpi_ut_get_object_type_name(rgn_desc)));
 
@@ -175,7 +175,7 @@ acpi_ex_setup_region(union acpi_operand_object *obj_desc,
 			 * byte, and a field with Dword access specified.
 			 */
 			ACPI_ERROR((AE_INFO,
-				    "Field [%4.4s] access width (%d bytes) too large for region [%4.4s] (length %X)",
+				    "Field [%4.4s] access width (%u bytes) too large for region [%4.4s] (length %u)",
 				    acpi_ut_get_node_name(obj_desc->
 							  common_field.node),
 				    obj_desc->common_field.access_byte_width,
@@ -189,7 +189,7 @@ acpi_ex_setup_region(union acpi_operand_object *obj_desc,
 		 * exceeds region length, indicate an error
 		 */
 		ACPI_ERROR((AE_INFO,
-			    "Field [%4.4s] Base+Offset+Width %X+%X+%X is beyond end of region [%4.4s] (length %X)",
+			    "Field [%4.4s] Base+Offset+Width %u+%u+%u is beyond end of region [%4.4s] (length %u)",
 			    acpi_ut_get_node_name(obj_desc->common_field.node),
 			    obj_desc->common_field.base_byte_offset,
 			    field_datum_byte_offset,
@@ -281,13 +281,13 @@ acpi_ex_access_region(union acpi_operand_object *obj_desc,
 	if (ACPI_FAILURE(status)) {
 		if (status == AE_NOT_IMPLEMENTED) {
 			ACPI_ERROR((AE_INFO,
-				    "Region %s(%X) not implemented",
+				    "Region %s(0x%X) not implemented",
 				    acpi_ut_get_region_name(rgn_desc->region.
 							    space_id),
 				    rgn_desc->region.space_id));
 		} else if (status == AE_NOT_EXIST) {
 			ACPI_ERROR((AE_INFO,
-				    "Region %s(%X) has no handler",
+				    "Region %s(0x%X) has no handler",
 				    acpi_ut_get_region_name(rgn_desc->region.
 							    space_id),
 				    rgn_desc->region.space_id));
@@ -525,7 +525,7 @@ acpi_ex_field_datum_io(union acpi_operand_object *obj_desc,
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Wrong object type in field I/O %X",
+		ACPI_ERROR((AE_INFO, "Wrong object type in field I/O %u",
 			    obj_desc->common.type));
 		status = AE_AML_INTERNAL;
 		break;
@@ -630,7 +630,7 @@ acpi_ex_write_with_update_rule(union acpi_operand_object *obj_desc,
 		default:
 
 			ACPI_ERROR((AE_INFO,
-				    "Unknown UpdateRule value: %X",
+				    "Unknown UpdateRule value: 0x%X",
 				    (obj_desc->common_field.
 				     field_flags &
 				     AML_FIELD_UPDATE_RULE_MASK)));
@@ -689,7 +689,7 @@ acpi_ex_extract_from_field(union acpi_operand_object *obj_desc,
 	if (buffer_length <
 	    ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.bit_length)) {
 		ACPI_ERROR((AE_INFO,
-			    "Field size %X (bits) is too large for buffer (%X)",
+			    "Field size %u (bits) is too large for buffer (%u)",
 			    obj_desc->common_field.bit_length, buffer_length));
 
 		return_ACPI_STATUS(AE_BUFFER_OVERFLOW);
diff --git a/drivers/acpi/acpica/exmisc.c b/drivers/acpi/acpica/exmisc.c
index c5bb1eeed2d..95db4be0877 100644
--- a/drivers/acpi/acpica/exmisc.c
+++ b/drivers/acpi/acpica/exmisc.c
@@ -99,7 +99,7 @@ acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
 
 		default:
 
-			ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X",
+			ACPI_ERROR((AE_INFO, "Unknown Reference Class 0x%2.2X",
 				    obj_desc->reference.class));
 			return_ACPI_STATUS(AE_AML_INTERNAL);
 		}
@@ -115,7 +115,7 @@ acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Invalid descriptor type %X",
+		ACPI_ERROR((AE_INFO, "Invalid descriptor type 0x%X",
 			    ACPI_GET_DESCRIPTOR_TYPE(obj_desc)));
 		return_ACPI_STATUS(AE_TYPE);
 	}
@@ -276,7 +276,7 @@ acpi_ex_do_concatenate(union acpi_operand_object *operand0,
 		break;
 
 	default:
-		ACPI_ERROR((AE_INFO, "Invalid object type: %X",
+		ACPI_ERROR((AE_INFO, "Invalid object type: 0x%X",
 			    operand0->common.type));
 		status = AE_AML_INTERNAL;
 	}
@@ -378,7 +378,7 @@ acpi_ex_do_concatenate(union acpi_operand_object *operand0,
 
 		/* Invalid object type, should not happen here */
 
-		ACPI_ERROR((AE_INFO, "Invalid object type: %X",
+		ACPI_ERROR((AE_INFO, "Invalid object type: 0x%X",
 			    operand0->common.type));
 		status = AE_AML_INTERNAL;
 		goto cleanup;
diff --git a/drivers/acpi/acpica/exmutex.c b/drivers/acpi/acpica/exmutex.c
index 7116bc86494..f73be97043c 100644
--- a/drivers/acpi/acpica/exmutex.c
+++ b/drivers/acpi/acpica/exmutex.c
@@ -85,10 +85,10 @@ void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc)
 		(obj_desc->mutex.prev)->mutex.next = obj_desc->mutex.next;
 
 		/*
-		 * Migrate the previous sync level associated with this mutex to the
-		 * previous mutex on the list so that it may be preserved. This handles
-		 * the case where several mutexes have been acquired at the same level,
-		 * but are not released in opposite order.
+		 * Migrate the previous sync level associated with this mutex to
+		 * the previous mutex on the list so that it may be preserved.
+		 * This handles the case where several mutexes have been acquired
+		 * at the same level, but are not released in opposite order.
 		 */
 		(obj_desc->mutex.prev)->mutex.original_sync_level =
 		    obj_desc->mutex.original_sync_level;
@@ -101,8 +101,8 @@ void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc)
  *
  * FUNCTION:    acpi_ex_link_mutex
  *
- * PARAMETERS:  obj_desc        - The mutex to be linked
- *              Thread          - Current executing thread object
+ * PARAMETERS:  obj_desc            - The mutex to be linked
+ *              Thread              - Current executing thread object
  *
  * RETURN:      None
  *
@@ -138,9 +138,9 @@ acpi_ex_link_mutex(union acpi_operand_object *obj_desc,
  *
  * FUNCTION:    acpi_ex_acquire_mutex_object
  *
- * PARAMETERS:  time_desc           - Timeout in milliseconds
+ * PARAMETERS:  Timeout             - Timeout in milliseconds
  *              obj_desc            - Mutex object
- *              Thread              - Current thread state
+ *              thread_id           - Current thread state
  *
  * RETURN:      Status
  *
@@ -234,7 +234,7 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc,
 		return_ACPI_STATUS(AE_BAD_PARAMETER);
 	}
 
-	/* Must have a valid thread ID */
+	/* Must have a valid thread state struct */
 
 	if (!walk_state->thread) {
 		ACPI_ERROR((AE_INFO,
@@ -249,7 +249,7 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc,
 	 */
 	if (walk_state->thread->current_sync_level > obj_desc->mutex.sync_level) {
 		ACPI_ERROR((AE_INFO,
-			    "Cannot acquire Mutex [%4.4s], current SyncLevel is too large (%d)",
+			    "Cannot acquire Mutex [%4.4s], current SyncLevel is too large (%u)",
 			    acpi_ut_get_node_name(obj_desc->mutex.node),
 			    walk_state->thread->current_sync_level));
 		return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
@@ -359,6 +359,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
 {
 	acpi_status status = AE_OK;
 	u8 previous_sync_level;
+	struct acpi_thread_state *owner_thread;
 
 	ACPI_FUNCTION_TRACE(ex_release_mutex);
 
@@ -366,9 +367,11 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
 		return_ACPI_STATUS(AE_BAD_PARAMETER);
 	}
 
+	owner_thread = obj_desc->mutex.owner_thread;
+
 	/* The mutex must have been previously acquired in order to release it */
 
-	if (!obj_desc->mutex.owner_thread) {
+	if (!owner_thread) {
 		ACPI_ERROR((AE_INFO,
 			    "Cannot release Mutex [%4.4s], not acquired",
 			    acpi_ut_get_node_name(obj_desc->mutex.node)));
@@ -387,16 +390,13 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
 	 * The Mutex is owned, but this thread must be the owner.
 	 * Special case for Global Lock, any thread can release
 	 */
-	if ((obj_desc->mutex.owner_thread->thread_id !=
-	     walk_state->thread->thread_id)
-	    && (obj_desc != acpi_gbl_global_lock_mutex)) {
+	if ((owner_thread->thread_id != walk_state->thread->thread_id) &&
+	    (obj_desc != acpi_gbl_global_lock_mutex)) {
 		ACPI_ERROR((AE_INFO,
 			    "Thread %p cannot release Mutex [%4.4s] acquired by thread %p",
 			    ACPI_CAST_PTR(void, walk_state->thread->thread_id),
 			    acpi_ut_get_node_name(obj_desc->mutex.node),
-			    ACPI_CAST_PTR(void,
-					  obj_desc->mutex.owner_thread->
-					  thread_id)));
+			    ACPI_CAST_PTR(void, owner_thread->thread_id)));
 		return_ACPI_STATUS(AE_AML_NOT_OWNER);
 	}
 
@@ -407,10 +407,9 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
 	 * different level can only mean that the mutex ordering rule is being
 	 * violated. This behavior is clarified in ACPI 4.0 specification.
 	 */
-	if (obj_desc->mutex.sync_level !=
-	    walk_state->thread->current_sync_level) {
+	if (obj_desc->mutex.sync_level != owner_thread->current_sync_level) {
 		ACPI_ERROR((AE_INFO,
-			    "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %d current %d",
+			    "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %u current %u",
 			    acpi_ut_get_node_name(obj_desc->mutex.node),
 			    obj_desc->mutex.sync_level,
 			    walk_state->thread->current_sync_level));
@@ -423,7 +422,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
 	 * acquired, but are not released in reverse order.
 	 */
 	previous_sync_level =
-	    walk_state->thread->acquired_mutex_list->mutex.original_sync_level;
+	    owner_thread->acquired_mutex_list->mutex.original_sync_level;
 
 	status = acpi_ex_release_mutex_object(obj_desc);
 	if (ACPI_FAILURE(status)) {
@@ -434,8 +433,9 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
 
 		/* Restore the previous sync_level */
 
-		walk_state->thread->current_sync_level = previous_sync_level;
+		owner_thread->current_sync_level = previous_sync_level;
 	}
+
 	return_ACPI_STATUS(status);
 }
 
@@ -443,7 +443,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
  *
  * FUNCTION:    acpi_ex_release_all_mutexes
  *
- * PARAMETERS:  Thread          - Current executing thread object
+ * PARAMETERS:  Thread              - Current executing thread object
  *
  * RETURN:      Status
  *
diff --git a/drivers/acpi/acpica/exnames.c b/drivers/acpi/acpica/exnames.c
index 679f308c5a8..d11e539ef76 100644
--- a/drivers/acpi/acpica/exnames.c
+++ b/drivers/acpi/acpica/exnames.c
@@ -102,7 +102,7 @@ static char *acpi_ex_allocate_name_string(u32 prefix_count, u32 num_name_segs)
 	name_string = ACPI_ALLOCATE(size_needed);
 	if (!name_string) {
 		ACPI_ERROR((AE_INFO,
-			    "Could not allocate size %d", size_needed));
+			    "Could not allocate size %u", size_needed));
 		return_PTR(NULL);
 	}
 
@@ -216,7 +216,7 @@ static acpi_status acpi_ex_name_segment(u8 ** in_aml_address, char *name_string)
 		 */
 		status = AE_AML_BAD_NAME;
 		ACPI_ERROR((AE_INFO,
-			    "Bad character %02x in name, at %p",
+			    "Bad character 0x%02x in name, at %p",
 			    *aml_address, aml_address));
 	}
 
diff --git a/drivers/acpi/acpica/exoparg1.c b/drivers/acpi/acpica/exoparg1.c
index 99adbab5acb..84e4d185aa2 100644
--- a/drivers/acpi/acpica/exoparg1.c
+++ b/drivers/acpi/acpica/exoparg1.c
@@ -110,7 +110,7 @@ acpi_status acpi_ex_opcode_0A_0T_1R(struct acpi_walk_state *walk_state)
 
 	default:		/*  Unknown opcode  */
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		break;
@@ -173,7 +173,7 @@ acpi_status acpi_ex_opcode_1A_0T_0R(struct acpi_walk_state *walk_state)
 
 	case AML_SLEEP_OP:	/*  Sleep (msec_time) */
 
-		status = acpi_ex_system_do_suspend(operand[0]->integer.value);
+		status = acpi_ex_system_do_sleep(operand[0]->integer.value);
 		break;
 
 	case AML_STALL_OP:	/*  Stall (usec_time) */
@@ -189,7 +189,7 @@ acpi_status acpi_ex_opcode_1A_0T_0R(struct acpi_walk_state *walk_state)
 
 	default:		/*  Unknown opcode  */
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		break;
@@ -229,7 +229,7 @@ acpi_status acpi_ex_opcode_1A_1T_0R(struct acpi_walk_state *walk_state)
 
 	default:		/* Unknown opcode */
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
@@ -399,7 +399,7 @@ acpi_status acpi_ex_opcode_1A_1T_1R(struct acpi_walk_state *walk_state)
 
 			if (digit > 0) {
 				ACPI_ERROR((AE_INFO,
-					    "Integer too large to convert to BCD: %8.8X%8.8X",
+					    "Integer too large to convert to BCD: 0x%8.8X%8.8X",
 					    ACPI_FORMAT_UINT64(operand[0]->
 							       integer.value)));
 				status = AE_AML_NUMERIC_OVERFLOW;
@@ -540,7 +540,7 @@ acpi_status acpi_ex_opcode_1A_1T_1R(struct acpi_walk_state *walk_state)
 
 	default:		/* Unknown opcode */
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
@@ -979,7 +979,7 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
 				default:
 
 					ACPI_ERROR((AE_INFO,
-						    "Unknown Index TargetType %X in reference object %p",
+						    "Unknown Index TargetType 0x%X in reference object %p",
 						    operand[0]->reference.
 						    target_type, operand[0]));
 					status = AE_AML_OPERAND_TYPE;
@@ -1007,7 +1007,7 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
 
 			default:
 				ACPI_ERROR((AE_INFO,
-					    "Unknown class in reference(%p) - %2.2X",
+					    "Unknown class in reference(%p) - 0x%2.2X",
 					    operand[0],
 					    operand[0]->reference.class));
 
@@ -1019,7 +1019,7 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
diff --git a/drivers/acpi/acpica/exoparg2.c b/drivers/acpi/acpica/exoparg2.c
index 22841bbbe63..10e104cf0fb 100644
--- a/drivers/acpi/acpica/exoparg2.c
+++ b/drivers/acpi/acpica/exoparg2.c
@@ -119,33 +119,6 @@ acpi_status acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state *walk_state)
 			status = AE_AML_OPERAND_TYPE;
 			break;
 		}
-#ifdef ACPI_GPE_NOTIFY_CHECK
-		/*
-		 * GPE method wake/notify check.  Here, we want to ensure that we
-		 * don't receive any "DeviceWake" Notifies from a GPE _Lxx or _Exx
-		 * GPE method during system runtime.  If we do, the GPE is marked
-		 * as "wake-only" and disabled.
-		 *
-		 * 1) Is the Notify() value == device_wake?
-		 * 2) Is this a GPE deferred method?  (An _Lxx or _Exx method)
-		 * 3) Did the original GPE happen at system runtime?
-		 *    (versus during wake)
-		 *
-		 * If all three cases are true, this is a wake-only GPE that should
-		 * be disabled at runtime.
-		 */
-		if (value == 2) {	/* device_wake */
-			status =
-			    acpi_ev_check_for_wake_only_gpe(walk_state->
-							    gpe_event_info);
-			if (ACPI_FAILURE(status)) {
-
-				/* AE_WAKE_ONLY_GPE only error, means ignore this notify */
-
-				return_ACPI_STATUS(AE_OK)
-			}
-		}
-#endif
 
 		/*
 		 * Dispatch the notify to the appropriate handler
@@ -159,7 +132,7 @@ acpi_status acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state *walk_state)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 	}
@@ -224,7 +197,7 @@ acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
@@ -441,7 +414,7 @@ acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
 
 		if (ACPI_FAILURE(status)) {
 			ACPI_EXCEPTION((AE_INFO, status,
-					"Index (%X%8.8X) is beyond end of object",
+					"Index (0x%8.8X%8.8X) is beyond end of object",
 					ACPI_FORMAT_UINT64(index)));
 			goto cleanup;
 		}
@@ -464,7 +437,7 @@ acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		break;
@@ -572,7 +545,7 @@ acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
diff --git a/drivers/acpi/acpica/exoparg3.c b/drivers/acpi/acpica/exoparg3.c
index 8bb1012ef44..7a08d23befc 100644
--- a/drivers/acpi/acpica/exoparg3.c
+++ b/drivers/acpi/acpica/exoparg3.c
@@ -119,7 +119,7 @@ acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
@@ -244,7 +244,7 @@ acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
diff --git a/drivers/acpi/acpica/exoparg6.c b/drivers/acpi/acpica/exoparg6.c
index f256b6a25f2..4b50730cf9a 100644
--- a/drivers/acpi/acpica/exoparg6.c
+++ b/drivers/acpi/acpica/exoparg6.c
@@ -245,7 +245,7 @@ acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state)
 		index = operand[5]->integer.value;
 		if (index >= operand[0]->package.count) {
 			ACPI_ERROR((AE_INFO,
-				    "Index (%X%8.8X) beyond package end (%X)",
+				    "Index (0x%8.8X%8.8X) beyond package end (0x%X)",
 				    ACPI_FORMAT_UINT64(index),
 				    operand[0]->package.count));
 			status = AE_AML_PACKAGE_LIMIT;
@@ -314,7 +314,7 @@ acpi_status acpi_ex_opcode_6A_0T_1R(struct acpi_walk_state * walk_state)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 			    walk_state->opcode));
 		status = AE_AML_BAD_OPCODE;
 		goto cleanup;
diff --git a/drivers/acpi/acpica/exprep.c b/drivers/acpi/acpica/exprep.c
index 2fbfe51fb14..25059dace0a 100644
--- a/drivers/acpi/acpica/exprep.c
+++ b/drivers/acpi/acpica/exprep.c
@@ -275,7 +275,7 @@ acpi_ex_decode_field_access(union acpi_operand_object *obj_desc,
 	default:
 		/* Invalid field access type */
 
-		ACPI_ERROR((AE_INFO, "Unknown field access type %X", access));
+		ACPI_ERROR((AE_INFO, "Unknown field access type 0x%X", access));
 		return_UINT32(0);
 	}
 
@@ -430,7 +430,7 @@ acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info)
 		type = acpi_ns_get_type(info->region_node);
 		if (type != ACPI_TYPE_REGION) {
 			ACPI_ERROR((AE_INFO,
-				    "Needed Region, found type %X (%s)",
+				    "Needed Region, found type 0x%X (%s)",
 				    type, acpi_ut_get_type_name(type)));
 
 			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
diff --git a/drivers/acpi/acpica/exregion.c b/drivers/acpi/acpica/exregion.c
index 486b2e5661b..531000fc77d 100644
--- a/drivers/acpi/acpica/exregion.c
+++ b/drivers/acpi/acpica/exregion.c
@@ -105,7 +105,7 @@ acpi_ex_system_memory_space_handler(u32 function,
 		break;
 
 	default:
-		ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %d",
+		ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
 			    bit_width));
 		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
 	}
@@ -173,7 +173,7 @@ acpi_ex_system_memory_space_handler(u32 function,
 		mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length);
 		if (!mem_info->mapped_logical_address) {
 			ACPI_ERROR((AE_INFO,
-				    "Could not map memory at %8.8X%8.8X, size %X",
+				    "Could not map memory at 0x%8.8X%8.8X, size %u",
 				    ACPI_FORMAT_NATIVE_UINT(address),
 				    (u32) map_length));
 			mem_info->mapped_length = 0;
@@ -491,8 +491,10 @@ acpi_ex_data_table_space_handler(u32 function,
 {
 	ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
 
-	/* Perform the memory read or write */
-
+	/*
+	 * Perform the memory read or write. The bit_width was already
+	 * validated.
+	 */
 	switch (function) {
 	case ACPI_READ:
 
@@ -502,9 +504,14 @@ acpi_ex_data_table_space_handler(u32 function,
 		break;
 
 	case ACPI_WRITE:
+
+		ACPI_MEMCPY(ACPI_PHYSADDR_TO_PTR(address),
+			    ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
+		break;
+
 	default:
 
-		return_ACPI_STATUS(AE_SUPPORT);
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
 	}
 
 	return_ACPI_STATUS(AE_OK);
diff --git a/drivers/acpi/acpica/exresnte.c b/drivers/acpi/acpica/exresnte.c
index fdc1b27999e..1fa4289a687 100644
--- a/drivers/acpi/acpica/exresnte.c
+++ b/drivers/acpi/acpica/exresnte.c
@@ -252,7 +252,7 @@ acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
 			/* No named references are allowed here */
 
 			ACPI_ERROR((AE_INFO,
-				    "Unsupported Reference type %X",
+				    "Unsupported Reference type 0x%X",
 				    source_desc->reference.class));
 
 			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
@@ -264,7 +264,7 @@ acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
 		/* Default case is for unknown types */
 
 		ACPI_ERROR((AE_INFO,
-			    "Node %p - Unknown object type %X",
+			    "Node %p - Unknown object type 0x%X",
 			    node, entry_type));
 
 		return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
diff --git a/drivers/acpi/acpica/exresolv.c b/drivers/acpi/acpica/exresolv.c
index fdd6a7079b9..7ca35ea8ace 100644
--- a/drivers/acpi/acpica/exresolv.c
+++ b/drivers/acpi/acpica/exresolv.c
@@ -231,7 +231,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
 				/* Invalid reference object */
 
 				ACPI_ERROR((AE_INFO,
-					    "Unknown TargetType %X in Index/Reference object %p",
+					    "Unknown TargetType 0x%X in Index/Reference object %p",
 					    stack_desc->reference.target_type,
 					    stack_desc));
 				status = AE_AML_INTERNAL;
@@ -273,8 +273,8 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
 		default:
 
 			ACPI_ERROR((AE_INFO,
-				    "Unknown Reference type %X in %p", ref_type,
-				    stack_desc));
+				    "Unknown Reference type 0x%X in %p",
+				    ref_type, stack_desc));
 			status = AE_AML_INTERNAL;
 			break;
 		}
@@ -403,7 +403,8 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
 
 			if (ACPI_GET_DESCRIPTOR_TYPE(node) !=
 			    ACPI_DESC_TYPE_NAMED) {
-				ACPI_ERROR((AE_INFO, "Not a NS node %p [%s]",
+				ACPI_ERROR((AE_INFO,
+					    "Not a namespace node %p [%s]",
 					    node,
 					    acpi_ut_get_descriptor_name(node)));
 				return_ACPI_STATUS(AE_AML_INTERNAL);
@@ -507,7 +508,7 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
 		default:
 
 			ACPI_ERROR((AE_INFO,
-				    "Unknown Reference Class %2.2X",
+				    "Unknown Reference Class 0x%2.2X",
 				    obj_desc->reference.class));
 			return_ACPI_STATUS(AE_AML_INTERNAL);
 		}
diff --git a/drivers/acpi/acpica/exresop.c b/drivers/acpi/acpica/exresop.c
index c5ecd615f14..8c97cfd6a0f 100644
--- a/drivers/acpi/acpica/exresop.c
+++ b/drivers/acpi/acpica/exresop.c
@@ -153,7 +153,7 @@ acpi_ex_resolve_operands(u16 opcode,
 
 	arg_types = op_info->runtime_args;
 	if (arg_types == ARGI_INVALID_OPCODE) {
-		ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", opcode));
+		ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", opcode));
 
 		return_ACPI_STATUS(AE_AML_INTERNAL);
 	}
@@ -218,7 +218,7 @@ acpi_ex_resolve_operands(u16 opcode,
 
 			if (!acpi_ut_valid_object_type(object_type)) {
 				ACPI_ERROR((AE_INFO,
-					    "Bad operand object type [%X]",
+					    "Bad operand object type [0x%X]",
 					    object_type));
 
 				return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
@@ -253,7 +253,7 @@ acpi_ex_resolve_operands(u16 opcode,
 				default:
 
 					ACPI_ERROR((AE_INFO,
-						    "Unknown Reference Class %2.2X in %p",
+						    "Unknown Reference Class 0x%2.2X in %p",
 						    obj_desc->reference.class,
 						    obj_desc));
 
@@ -665,7 +665,7 @@ acpi_ex_resolve_operands(u16 opcode,
 			/* Unknown type */
 
 			ACPI_ERROR((AE_INFO,
-				    "Internal - Unknown ARGI (required operand) type %X",
+				    "Internal - Unknown ARGI (required operand) type 0x%X",
 				    this_arg_type));
 
 			return_ACPI_STATUS(AE_BAD_PARAMETER);
diff --git a/drivers/acpi/acpica/exstore.c b/drivers/acpi/acpica/exstore.c
index 702b9ecfd44..1624436ba4c 100644
--- a/drivers/acpi/acpica/exstore.c
+++ b/drivers/acpi/acpica/exstore.c
@@ -1,4 +1,3 @@
-
 /******************************************************************************
  *
  * Module Name: exstore - AML Interpreter object store support
@@ -53,10 +52,6 @@
 ACPI_MODULE_NAME("exstore")
 
 /* Local prototypes */
-static void
-acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
-			u32 level, u32 index);
-
 static acpi_status
 acpi_ex_store_object_to_index(union acpi_operand_object *val_desc,
 			      union acpi_operand_object *dest_desc,
@@ -64,215 +59,6 @@ acpi_ex_store_object_to_index(union acpi_operand_object *val_desc,
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ex_do_debug_object
- *
- * PARAMETERS:  source_desc         - Value to be stored
- *              Level               - Indentation level (used for packages)
- *              Index               - Current package element, zero if not pkg
- *
- * RETURN:      None
- *
- * DESCRIPTION: Handles stores to the Debug Object.
- *
- ******************************************************************************/
-
-static void
-acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
-			u32 level, u32 index)
-{
-	u32 i;
-
-	ACPI_FUNCTION_TRACE_PTR(ex_do_debug_object, source_desc);
-
-	/* Print line header as long as we are not in the middle of an object display */
-
-	if (!((level > 0) && index == 0)) {
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s",
-				      level, " "));
-	}
-
-	/* Display index for package output only */
-
-	if (index > 0) {
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-				      "(%.2u) ", index - 1));
-	}
-
-	if (!source_desc) {
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[Null Object]\n"));
-		return_VOID;
-	}
-
-	if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) {
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s ",
-				      acpi_ut_get_object_type_name
-				      (source_desc)));
-
-		if (!acpi_ut_valid_internal_object(source_desc)) {
-			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-					      "%p, Invalid Internal Object!\n",
-					      source_desc));
-			return_VOID;
-		}
-	} else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) ==
-		   ACPI_DESC_TYPE_NAMED) {
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: %p\n",
-				      acpi_ut_get_type_name(((struct
-							      acpi_namespace_node
-							      *)source_desc)->
-							    type),
-				      source_desc));
-		return_VOID;
-	} else {
-		return_VOID;
-	}
-
-	/* source_desc is of type ACPI_DESC_TYPE_OPERAND */
-
-	switch (source_desc->common.type) {
-	case ACPI_TYPE_INTEGER:
-
-		/* Output correct integer width */
-
-		if (acpi_gbl_integer_byte_width == 4) {
-			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n",
-					      (u32) source_desc->integer.
-					      value));
-		} else {
-			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-					      "0x%8.8X%8.8X\n",
-					      ACPI_FORMAT_UINT64(source_desc->
-								 integer.
-								 value)));
-		}
-		break;
-
-	case ACPI_TYPE_BUFFER:
-
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n",
-				      (u32) source_desc->buffer.length));
-		ACPI_DUMP_BUFFER(source_desc->buffer.pointer,
-				 (source_desc->buffer.length <
-				  256) ? source_desc->buffer.length : 256);
-		break;
-
-	case ACPI_TYPE_STRING:
-
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n",
-				      source_desc->string.length,
-				      source_desc->string.pointer));
-		break;
-
-	case ACPI_TYPE_PACKAGE:
-
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-				      "[Contains 0x%.2X Elements]\n",
-				      source_desc->package.count));
-
-		/* Output the entire contents of the package */
-
-		for (i = 0; i < source_desc->package.count; i++) {
-			acpi_ex_do_debug_object(source_desc->package.
-						elements[i], level + 4, i + 1);
-		}
-		break;
-
-	case ACPI_TYPE_LOCAL_REFERENCE:
-
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s] ",
-				      acpi_ut_get_reference_name(source_desc)));
-
-		/* Decode the reference */
-
-		switch (source_desc->reference.class) {
-		case ACPI_REFCLASS_INDEX:
-
-			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%X\n",
-					      source_desc->reference.value));
-			break;
-
-		case ACPI_REFCLASS_TABLE:
-
-			/* Case for ddb_handle */
-
-			ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-					      "Table Index 0x%X\n",
-					      source_desc->reference.value));
-			return;
-
-		default:
-			break;
-		}
-
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "  "));
-
-		/* Check for valid node first, then valid object */
-
-		if (source_desc->reference.node) {
-			if (ACPI_GET_DESCRIPTOR_TYPE
-			    (source_desc->reference.node) !=
-			    ACPI_DESC_TYPE_NAMED) {
-				ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-						      " %p - Not a valid namespace node\n",
-						      source_desc->reference.
-						      node));
-			} else {
-				ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
-						      "Node %p [%4.4s] ",
-						      source_desc->reference.
-						      node,
-						      (source_desc->reference.
-						       node)->name.ascii));
-
-				switch ((source_desc->reference.node)->type) {
-
-					/* These types have no attached object */
-
-				case ACPI_TYPE_DEVICE:
-					acpi_os_printf("Device\n");
-					break;
-
-				case ACPI_TYPE_THERMAL:
-					acpi_os_printf("Thermal Zone\n");
-					break;
-
-				default:
-					acpi_ex_do_debug_object((source_desc->
-								 reference.
-								 node)->object,
-								level + 4, 0);
-					break;
-				}
-			}
-		} else if (source_desc->reference.object) {
-			if (ACPI_GET_DESCRIPTOR_TYPE
-			    (source_desc->reference.object) ==
-			    ACPI_DESC_TYPE_NAMED) {
-				acpi_ex_do_debug_object(((struct
-							  acpi_namespace_node *)
-							 source_desc->reference.
-							 object)->object,
-							level + 4, 0);
-			} else {
-				acpi_ex_do_debug_object(source_desc->reference.
-							object, level + 4, 0);
-			}
-		}
-		break;
-
-	default:
-
-		ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p\n",
-				      source_desc));
-		break;
-	}
-
-	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n"));
-	return_VOID;
-}
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ex_store
  *
  * PARAMETERS:  *source_desc        - Value to be stored
@@ -402,12 +188,12 @@ acpi_ex_store(union acpi_operand_object *source_desc,
 				  source_desc,
 				  acpi_ut_get_object_type_name(source_desc)));
 
-		acpi_ex_do_debug_object(source_desc, 0, 0);
+		ACPI_DEBUG_OBJECT(source_desc, 0, 0);
 		break;
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X",
+		ACPI_ERROR((AE_INFO, "Unknown Reference Class 0x%2.2X",
 			    ref_desc->reference.class));
 		ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_INFO);
 
diff --git a/drivers/acpi/acpica/exsystem.c b/drivers/acpi/acpica/exsystem.c
index e11b6cb42a5..6d32e09327f 100644
--- a/drivers/acpi/acpica/exsystem.c
+++ b/drivers/acpi/acpica/exsystem.c
@@ -170,7 +170,7 @@ acpi_status acpi_ex_system_do_stall(u32 how_long)
 		 * (ACPI specifies 100 usec as max, but this gives some slack in
 		 * order to support existing BIOSs)
 		 */
-		ACPI_ERROR((AE_INFO, "Time parameter is too large (%d)",
+		ACPI_ERROR((AE_INFO, "Time parameter is too large (%u)",
 			    how_long));
 		status = AE_AML_OPERAND_VALUE;
 	} else {
@@ -182,18 +182,18 @@ acpi_status acpi_ex_system_do_stall(u32 how_long)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ex_system_do_suspend
+ * FUNCTION:    acpi_ex_system_do_sleep
  *
- * PARAMETERS:  how_long        - The amount of time to suspend,
+ * PARAMETERS:  how_long        - The amount of time to sleep,
  *                                in milliseconds
  *
  * RETURN:      None
  *
- * DESCRIPTION: Suspend running thread for specified amount of time.
+ * DESCRIPTION: Sleep the running thread for specified amount of time.
  *
  ******************************************************************************/
 
-acpi_status acpi_ex_system_do_suspend(u64 how_long)
+acpi_status acpi_ex_system_do_sleep(u64 how_long)
 {
 	ACPI_FUNCTION_ENTRY();
 
diff --git a/drivers/acpi/acpica/hwacpi.c b/drivers/acpi/acpica/hwacpi.c
index 679a112a7d2..b44274a0b62 100644
--- a/drivers/acpi/acpica/hwacpi.c
+++ b/drivers/acpi/acpica/hwacpi.c
@@ -63,7 +63,6 @@ acpi_status acpi_hw_set_mode(u32 mode)
 {
 
 	acpi_status status;
-	u32 retry;
 
 	ACPI_FUNCTION_TRACE(hw_set_mode);
 
@@ -125,24 +124,7 @@ acpi_status acpi_hw_set_mode(u32 mode)
 		return_ACPI_STATUS(status);
 	}
 
-	/*
-	 * Some hardware takes a LONG time to switch modes. Give them 3 sec to
-	 * do so, but allow faster systems to proceed more quickly.
-	 */
-	retry = 3000;
-	while (retry) {
-		if (acpi_hw_get_mode() == mode) {
-			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-					  "Mode %X successfully enabled\n",
-					  mode));
-			return_ACPI_STATUS(AE_OK);
-		}
-		acpi_os_stall(1000);
-		retry--;
-	}
-
-	ACPI_ERROR((AE_INFO, "Hardware did not change modes"));
-	return_ACPI_STATUS(AE_NO_HARDWARE_RESPONSE);
+	return_ACPI_STATUS(AE_OK);
 }
 
 /*******************************************************************************
diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c
index ec7fc227b33..5d1273b660a 100644
--- a/drivers/acpi/acpica/hwregs.c
+++ b/drivers/acpi/acpica/hwregs.c
@@ -299,7 +299,7 @@ struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id)
 	ACPI_FUNCTION_ENTRY();
 
 	if (register_id > ACPI_BITREG_MAX) {
-		ACPI_ERROR((AE_INFO, "Invalid BitRegister ID: %X",
+		ACPI_ERROR((AE_INFO, "Invalid BitRegister ID: 0x%X",
 			    register_id));
 		return (NULL);
 	}
@@ -413,7 +413,7 @@ acpi_hw_register_read(u32 register_id, u32 * return_value)
 		break;
 
 	default:
-		ACPI_ERROR((AE_INFO, "Unknown Register ID: %X", register_id));
+		ACPI_ERROR((AE_INFO, "Unknown Register ID: 0x%X", register_id));
 		status = AE_BAD_PARAMETER;
 		break;
 	}
@@ -549,7 +549,7 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value)
 		break;
 
 	default:
-		ACPI_ERROR((AE_INFO, "Unknown Register ID: %X", register_id));
+		ACPI_ERROR((AE_INFO, "Unknown Register ID: 0x%X", register_id));
 		status = AE_BAD_PARAMETER;
 		break;
 	}
diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
index 5e6d4dbb802..36eb803dd9d 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -245,7 +245,7 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
 
 	if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
 	    (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
-		ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X",
+		ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
 			    acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
 		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
 	}
diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
index e26c17d4b71..c10d587c164 100644
--- a/drivers/acpi/acpica/hwvalid.c
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -150,7 +150,7 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
 
 	if (last_address > ACPI_UINT16_MAX) {
 		ACPI_ERROR((AE_INFO,
-			    "Illegal I/O port address/length above 64K: 0x%p/%X",
+			    "Illegal I/O port address/length above 64K: %p/0x%X",
 			    ACPI_CAST_PTR(void, address), byte_width));
 		return_ACPI_STATUS(AE_LIMIT);
 	}
diff --git a/drivers/acpi/acpica/nsaccess.c b/drivers/acpi/acpica/nsaccess.c
index aa2b80132d0..3a2814676ac 100644
--- a/drivers/acpi/acpica/nsaccess.c
+++ b/drivers/acpi/acpica/nsaccess.c
@@ -222,7 +222,7 @@ acpi_status acpi_ns_root_initialize(void)
 			default:
 
 				ACPI_ERROR((AE_INFO,
-					    "Unsupported initial type value %X",
+					    "Unsupported initial type value 0x%X",
 					    init_val->type));
 				acpi_ut_remove_reference(obj_desc);
 				obj_desc = NULL;
diff --git a/drivers/acpi/acpica/nsdump.c b/drivers/acpi/acpica/nsdump.c
index 0689d36638d..2110cc2360f 100644
--- a/drivers/acpi/acpica/nsdump.c
+++ b/drivers/acpi/acpica/nsdump.c
@@ -205,8 +205,8 @@ acpi_ns_dump_one_object(acpi_handle obj_handle,
 		/* Check the node type and name */
 
 		if (type > ACPI_TYPE_LOCAL_MAX) {
-			ACPI_WARNING((AE_INFO, "Invalid ACPI Object Type %08X",
-				      type));
+			ACPI_WARNING((AE_INFO,
+				      "Invalid ACPI Object Type 0x%08X", type));
 		}
 
 		if (!acpi_ut_valid_acpi_name(this_node->name.integer)) {
diff --git a/drivers/acpi/acpica/nsnames.c b/drivers/acpi/acpica/nsnames.c
index 95937245163..7dea0031605 100644
--- a/drivers/acpi/acpica/nsnames.c
+++ b/drivers/acpi/acpica/nsnames.c
@@ -107,7 +107,7 @@ acpi_ns_build_external_path(struct acpi_namespace_node *node,
 
 	if (index != 0) {
 		ACPI_ERROR((AE_INFO,
-			    "Could not construct external pathname; index=%X, size=%X, Path=%s",
+			    "Could not construct external pathname; index=%u, size=%u, Path=%s",
 			    (u32) index, (u32) size, &name_buffer[size]));
 
 		return (AE_BAD_PARAMETER);
diff --git a/drivers/acpi/acpica/nssearch.c b/drivers/acpi/acpica/nssearch.c
index 08f8b3f5cca..a8e42b5e946 100644
--- a/drivers/acpi/acpica/nssearch.c
+++ b/drivers/acpi/acpica/nssearch.c
@@ -311,7 +311,7 @@ acpi_ns_search_and_enter(u32 target_name,
 
 	if (!node || !target_name || !return_node) {
 		ACPI_ERROR((AE_INFO,
-			    "Null parameter: Node %p Name %X ReturnNode %p",
+			    "Null parameter: Node %p Name 0x%X ReturnNode %p",
 			    node, target_name, return_node));
 		return_ACPI_STATUS(AE_BAD_PARAMETER);
 	}
diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c
index 24d05a87a2a..bab559712da 100644
--- a/drivers/acpi/acpica/nsutils.c
+++ b/drivers/acpi/acpica/nsutils.c
@@ -276,7 +276,7 @@ u32 acpi_ns_local(acpi_object_type type)
 
 		/* Type code out of range  */
 
-		ACPI_WARNING((AE_INFO, "Invalid Object Type %X", type));
+		ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type));
 		return_UINT32(ACPI_NS_NORMAL);
 	}
 
@@ -764,7 +764,7 @@ u32 acpi_ns_opens_scope(acpi_object_type type)
 
 		/* type code out of range  */
 
-		ACPI_WARNING((AE_INFO, "Invalid Object Type %X", type));
+		ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type));
 		return_UINT32(ACPI_NS_NORMAL);
 	}
 
diff --git a/drivers/acpi/acpica/psargs.c b/drivers/acpi/acpica/psargs.c
index 00493e108a0..7df1a4c9527 100644
--- a/drivers/acpi/acpica/psargs.c
+++ b/drivers/acpi/acpica/psargs.c
@@ -460,7 +460,7 @@ acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state,
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Invalid ArgType %X", arg_type));
+		ACPI_ERROR((AE_INFO, "Invalid ArgType 0x%X", arg_type));
 		return_VOID;
 	}
 
@@ -742,7 +742,7 @@ acpi_ps_get_next_arg(struct acpi_walk_state *walk_state,
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Invalid ArgType: %X", arg_type));
+		ACPI_ERROR((AE_INFO, "Invalid ArgType: 0x%X", arg_type));
 		status = AE_AML_OPERAND_TYPE;
 		break;
 	}
diff --git a/drivers/acpi/acpica/psloop.c b/drivers/acpi/acpica/psloop.c
index 59aabaeab1d..2f2e7760938 100644
--- a/drivers/acpi/acpica/psloop.c
+++ b/drivers/acpi/acpica/psloop.c
@@ -136,7 +136,7 @@ static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state)
 		/* The opcode is unrecognized. Just skip unknown opcodes */
 
 		ACPI_ERROR((AE_INFO,
-			    "Found unknown opcode %X at AML address %p offset %X, ignoring",
+			    "Found unknown opcode 0x%X at AML address %p offset 0x%X, ignoring",
 			    walk_state->opcode, walk_state->parser_state.aml,
 			    walk_state->aml_offset));
 
@@ -1021,7 +1021,6 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state)
 					if (status == AE_AML_NO_RETURN_VALUE) {
 						ACPI_EXCEPTION((AE_INFO, status,
 								"Invoked method did not return a value"));
-
 					}
 
 					ACPI_EXCEPTION((AE_INFO, status,
diff --git a/drivers/acpi/acpica/psxface.c b/drivers/acpi/acpica/psxface.c
index 6064dd4e94c..c42f067cff9 100644
--- a/drivers/acpi/acpica/psxface.c
+++ b/drivers/acpi/acpica/psxface.c
@@ -46,6 +46,7 @@
 #include "acparser.h"
 #include "acdispat.h"
 #include "acinterp.h"
+#include "actables.h"
 #include "amlcode.h"
 
 #define _COMPONENT          ACPI_PARSER
@@ -220,6 +221,10 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
 
 	ACPI_FUNCTION_TRACE(ps_execute_method);
 
+	/* Quick validation of DSDT header */
+
+	acpi_tb_check_dsdt_header();
+
 	/* Validate the Info and method Node */
 
 	if (!info || !info->resolved_node) {
diff --git a/drivers/acpi/acpica/rscreate.c b/drivers/acpi/acpica/rscreate.c
index f2ee3b54860..c80a2eea3a0 100644
--- a/drivers/acpi/acpica/rscreate.c
+++ b/drivers/acpi/acpica/rscreate.c
@@ -212,7 +212,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 
 		if ((*top_object_list)->common.type != ACPI_TYPE_PACKAGE) {
 			ACPI_ERROR((AE_INFO,
-				    "(PRT[%X]) Need sub-package, found %s",
+				    "(PRT[%u]) Need sub-package, found %s",
 				    index,
 				    acpi_ut_get_object_type_name
 				    (*top_object_list)));
@@ -223,7 +223,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 
 		if ((*top_object_list)->package.count != 4) {
 			ACPI_ERROR((AE_INFO,
-				    "(PRT[%X]) Need package of length 4, found length %d",
+				    "(PRT[%u]) Need package of length 4, found length %u",
 				    index, (*top_object_list)->package.count));
 			return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT);
 		}
@@ -240,7 +240,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 		obj_desc = sub_object_list[0];
 		if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
 			ACPI_ERROR((AE_INFO,
-				    "(PRT[%X].Address) Need Integer, found %s",
+				    "(PRT[%u].Address) Need Integer, found %s",
 				    index,
 				    acpi_ut_get_object_type_name(obj_desc)));
 			return_ACPI_STATUS(AE_BAD_DATA);
@@ -253,7 +253,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 		obj_desc = sub_object_list[1];
 		if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
 			ACPI_ERROR((AE_INFO,
-				    "(PRT[%X].Pin) Need Integer, found %s",
+				    "(PRT[%u].Pin) Need Integer, found %s",
 				    index,
 				    acpi_ut_get_object_type_name(obj_desc)));
 			return_ACPI_STATUS(AE_BAD_DATA);
@@ -289,7 +289,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 				if (obj_desc->reference.class !=
 				    ACPI_REFCLASS_NAME) {
 					ACPI_ERROR((AE_INFO,
-						    "(PRT[%X].Source) Need name, found Reference Class %X",
+						    "(PRT[%u].Source) Need name, found Reference Class 0x%X",
 						    index,
 						    obj_desc->reference.class));
 					return_ACPI_STATUS(AE_BAD_DATA);
@@ -340,7 +340,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 			default:
 
 				ACPI_ERROR((AE_INFO,
-					    "(PRT[%X].Source) Need Ref/String/Integer, found %s",
+					    "(PRT[%u].Source) Need Ref/String/Integer, found %s",
 					    index,
 					    acpi_ut_get_object_type_name
 					    (obj_desc)));
@@ -358,7 +358,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 		obj_desc = sub_object_list[3];
 		if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
 			ACPI_ERROR((AE_INFO,
-				    "(PRT[%X].SourceIndex) Need Integer, found %s",
+				    "(PRT[%u].SourceIndex) Need Integer, found %s",
 				    index,
 				    acpi_ut_get_object_type_name(obj_desc)));
 			return_ACPI_STATUS(AE_BAD_DATA);
diff --git a/drivers/acpi/acpica/rslist.c b/drivers/acpi/acpica/rslist.c
index fd057c72d25..7335f22aac2 100644
--- a/drivers/acpi/acpica/rslist.c
+++ b/drivers/acpi/acpica/rslist.c
@@ -94,7 +94,7 @@ acpi_rs_convert_aml_to_resources(u8 * aml,
 					    [resource_index]);
 	if (ACPI_FAILURE(status)) {
 		ACPI_EXCEPTION((AE_INFO, status,
-				"Could not convert AML resource (Type %X)",
+				"Could not convert AML resource (Type 0x%X)",
 				*aml));
 		return_ACPI_STATUS(status);
 	}
@@ -147,7 +147,7 @@ acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
 
 		if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
 			ACPI_ERROR((AE_INFO,
-				    "Invalid descriptor type (%X) in resource list",
+				    "Invalid descriptor type (0x%X) in resource list",
 				    resource->type));
 			return_ACPI_STATUS(AE_BAD_DATA);
 		}
@@ -161,7 +161,7 @@ acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
 							 [resource->type]);
 		if (ACPI_FAILURE(status)) {
 			ACPI_EXCEPTION((AE_INFO, status,
-					"Could not convert resource (type %X) to AML",
+					"Could not convert resource (type 0x%X) to AML",
 					resource->type));
 			return_ACPI_STATUS(status);
 		}
diff --git a/drivers/acpi/acpica/rsmisc.c b/drivers/acpi/acpica/rsmisc.c
index 07de352fa44..f8cd9e87d98 100644
--- a/drivers/acpi/acpica/rsmisc.c
+++ b/drivers/acpi/acpica/rsmisc.c
@@ -88,7 +88,7 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
 		/* Each internal resource struct is expected to be 32-bit aligned */
 
 		ACPI_WARNING((AE_INFO,
-			      "Misaligned resource pointer (get): %p Type %2.2X Len %X",
+			      "Misaligned resource pointer (get): %p Type 0x%2.2X Length %u",
 			      resource, resource->type, resource->length));
 	}
 
@@ -541,7 +541,7 @@ if (((aml->irq.flags & 0x09) == 0x00) || ((aml->irq.flags & 0x09) == 0x09)) {
 	 * "IRQ Format"), so 0x00 and 0x09 are illegal.
 	 */
 	ACPI_ERROR((AE_INFO,
-		    "Invalid interrupt polarity/trigger in resource list, %X",
+		    "Invalid interrupt polarity/trigger in resource list, 0x%X",
 		    aml->irq.flags));
 	return_ACPI_STATUS(AE_BAD_DATA);
 }
diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c
index f43fbe0fc3f..1728cb9bf60 100644
--- a/drivers/acpi/acpica/tbfadt.c
+++ b/drivers/acpi/acpica/tbfadt.c
@@ -283,7 +283,7 @@ void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length)
 	if (length > sizeof(struct acpi_table_fadt)) {
 		ACPI_WARNING((AE_INFO,
 			      "FADT (revision %u) is longer than ACPI 2.0 version, "
-			      "truncating length 0x%X to 0x%X",
+			      "truncating length %u to %u",
 			      table->revision, length,
 			      (u32)sizeof(struct acpi_table_fadt)));
 	}
@@ -422,7 +422,7 @@ static void acpi_tb_convert_fadt(void)
 		if (address64->address && address32 &&
 		    (address64->address != (u64) address32)) {
 			ACPI_ERROR((AE_INFO,
-				    "32/64X address mismatch in %s: %8.8X/%8.8X%8.8X, using 32",
+				    "32/64X address mismatch in %s: 0x%8.8X/0x%8.8X%8.8X, using 32",
 				    fadt_info_table[i].name, address32,
 				    ACPI_FORMAT_UINT64(address64->address)));
 		}
@@ -481,7 +481,7 @@ static void acpi_tb_validate_fadt(void)
 	    (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) {
 		ACPI_WARNING((AE_INFO,
 			      "32/64X FACS address mismatch in FADT - "
-			      "%8.8X/%8.8X%8.8X, using 32",
+			      "0x%8.8X/0x%8.8X%8.8X, using 32",
 			      acpi_gbl_FADT.facs,
 			      ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs)));
 
@@ -492,7 +492,7 @@ static void acpi_tb_validate_fadt(void)
 	    (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) {
 		ACPI_WARNING((AE_INFO,
 			      "32/64X DSDT address mismatch in FADT - "
-			      "%8.8X/%8.8X%8.8X, using 32",
+			      "0x%8.8X/0x%8.8X%8.8X, using 32",
 			      acpi_gbl_FADT.dsdt,
 			      ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xdsdt)));
 
@@ -521,7 +521,7 @@ static void acpi_tb_validate_fadt(void)
 		if (address64->address &&
 		    (address64->bit_width != ACPI_MUL_8(length))) {
 			ACPI_WARNING((AE_INFO,
-				      "32/64X length mismatch in %s: %d/%d",
+				      "32/64X length mismatch in %s: %u/%u",
 				      name, ACPI_MUL_8(length),
 				      address64->bit_width));
 		}
@@ -534,7 +534,7 @@ static void acpi_tb_validate_fadt(void)
 			if (!address64->address || !length) {
 				ACPI_ERROR((AE_INFO,
 					    "Required field %s has zero address and/or length:"
-					    " %8.8X%8.8X/%X",
+					    " 0x%8.8X%8.8X/0x%X",
 					    name,
 					    ACPI_FORMAT_UINT64(address64->
 							       address),
@@ -550,7 +550,7 @@ static void acpi_tb_validate_fadt(void)
 			    (!address64->address && length)) {
 				ACPI_WARNING((AE_INFO,
 					      "Optional field %s has zero address or length: "
-					      "%8.8X%8.8X/%X",
+					      "0x%8.8X%8.8X/0x%X",
 					      name,
 					      ACPI_FORMAT_UINT64(address64->
 								 address),
@@ -600,7 +600,7 @@ static void acpi_tb_setup_fadt_registers(void)
 			    (fadt_info_table[i].default_length !=
 			     target64->bit_width)) {
 				ACPI_WARNING((AE_INFO,
-					      "Invalid length for %s: %d, using default %d",
+					      "Invalid length for %s: %u, using default %u",
 					      fadt_info_table[i].name,
 					      target64->bit_width,
 					      fadt_info_table[i].
diff --git a/drivers/acpi/acpica/tbfind.c b/drivers/acpi/acpica/tbfind.c
index e252180ce61..989d5c86786 100644
--- a/drivers/acpi/acpica/tbfind.c
+++ b/drivers/acpi/acpica/tbfind.c
@@ -83,7 +83,7 @@ acpi_tb_find_table(char *signature,
 
 	/* Search for the table */
 
-	for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
 		if (ACPI_MEMCMP(&(acpi_gbl_root_table_list.tables[i].signature),
 				header.signature, ACPI_NAME_SIZE)) {
 
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 7ec02b0f69e..83d7af8d090 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -137,7 +137,7 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
 
 	/* Check if table is already registered */
 
-	for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
 		if (!acpi_gbl_root_table_list.tables[i].pointer) {
 			status =
 			    acpi_tb_verify_table(&acpi_gbl_root_table_list.
@@ -273,7 +273,7 @@ acpi_status acpi_tb_resize_root_table_list(void)
 	/* Increase the Table Array size */
 
 	tables = ACPI_ALLOCATE_ZEROED(((acpi_size) acpi_gbl_root_table_list.
-				       size +
+				       max_table_count +
 				       ACPI_ROOT_TABLE_SIZE_INCREMENT) *
 				      sizeof(struct acpi_table_desc));
 	if (!tables) {
@@ -286,8 +286,8 @@ acpi_status acpi_tb_resize_root_table_list(void)
 
 	if (acpi_gbl_root_table_list.tables) {
 		ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
-			    (acpi_size) acpi_gbl_root_table_list.size *
-			    sizeof(struct acpi_table_desc));
+			    (acpi_size) acpi_gbl_root_table_list.
+			    max_table_count * sizeof(struct acpi_table_desc));
 
 		if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 			ACPI_FREE(acpi_gbl_root_table_list.tables);
@@ -295,8 +295,9 @@ acpi_status acpi_tb_resize_root_table_list(void)
 	}
 
 	acpi_gbl_root_table_list.tables = tables;
-	acpi_gbl_root_table_list.size += ACPI_ROOT_TABLE_SIZE_INCREMENT;
-	acpi_gbl_root_table_list.flags |= (u8) ACPI_ROOT_ORIGIN_ALLOCATED;
+	acpi_gbl_root_table_list.max_table_count +=
+	    ACPI_ROOT_TABLE_SIZE_INCREMENT;
+	acpi_gbl_root_table_list.flags |= (u8)ACPI_ROOT_ORIGIN_ALLOCATED;
 
 	return_ACPI_STATUS(AE_OK);
 }
@@ -321,38 +322,36 @@ acpi_tb_store_table(acpi_physical_address address,
 		    struct acpi_table_header *table,
 		    u32 length, u8 flags, u32 *table_index)
 {
-	acpi_status status = AE_OK;
+	acpi_status status;
+	struct acpi_table_desc *new_table;
 
 	/* Ensure that there is room for the table in the Root Table List */
 
-	if (acpi_gbl_root_table_list.count >= acpi_gbl_root_table_list.size) {
+	if (acpi_gbl_root_table_list.current_table_count >=
+	    acpi_gbl_root_table_list.max_table_count) {
 		status = acpi_tb_resize_root_table_list();
 		if (ACPI_FAILURE(status)) {
 			return (status);
 		}
 	}
 
+	new_table =
+	    &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
+					     current_table_count];
+
 	/* Initialize added table */
 
-	acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
-	    address = address;
-	acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
-	    pointer = table;
-	acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].length =
-	    length;
-	acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
-	    owner_id = 0;
-	acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].flags =
-	    flags;
-
-	ACPI_MOVE_32_TO_32(&
-			   (acpi_gbl_root_table_list.
-			    tables[acpi_gbl_root_table_list.count].signature),
-			   table->signature);
-
-	*table_index = acpi_gbl_root_table_list.count;
-	acpi_gbl_root_table_list.count++;
-	return (status);
+	new_table->address = address;
+	new_table->pointer = table;
+	new_table->length = length;
+	new_table->owner_id = 0;
+	new_table->flags = flags;
+
+	ACPI_MOVE_32_TO_32(&new_table->signature, table->signature);
+
+	*table_index = acpi_gbl_root_table_list.current_table_count;
+	acpi_gbl_root_table_list.current_table_count++;
+	return (AE_OK);
 }
 
 /*******************************************************************************
@@ -408,7 +407,7 @@ void acpi_tb_terminate(void)
 
 	/* Delete the individual tables */
 
-	for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
 		acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
 	}
 
@@ -422,7 +421,7 @@ void acpi_tb_terminate(void)
 
 	acpi_gbl_root_table_list.tables = NULL;
 	acpi_gbl_root_table_list.flags = 0;
-	acpi_gbl_root_table_list.count = 0;
+	acpi_gbl_root_table_list.current_table_count = 0;
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
 	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
@@ -452,7 +451,7 @@ acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
 		return_ACPI_STATUS(status);
 	}
 
-	if (table_index >= acpi_gbl_root_table_list.count) {
+	if (table_index >= acpi_gbl_root_table_list.current_table_count) {
 
 		/* The table index does not exist */
 
@@ -505,7 +504,7 @@ acpi_status acpi_tb_allocate_owner_id(u32 table_index)
 	ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
 
 	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-	if (table_index < acpi_gbl_root_table_list.count) {
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
 		status = acpi_ut_allocate_owner_id
 		    (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
 	}
@@ -533,7 +532,7 @@ acpi_status acpi_tb_release_owner_id(u32 table_index)
 	ACPI_FUNCTION_TRACE(tb_release_owner_id);
 
 	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-	if (table_index < acpi_gbl_root_table_list.count) {
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
 		acpi_ut_release_owner_id(&
 					 (acpi_gbl_root_table_list.
 					  tables[table_index].owner_id));
@@ -564,7 +563,7 @@ acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
 	ACPI_FUNCTION_TRACE(tb_get_owner_id);
 
 	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-	if (table_index < acpi_gbl_root_table_list.count) {
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
 		*owner_id =
 		    acpi_gbl_root_table_list.tables[table_index].owner_id;
 		status = AE_OK;
@@ -589,7 +588,7 @@ u8 acpi_tb_is_table_loaded(u32 table_index)
 	u8 is_loaded = FALSE;
 
 	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-	if (table_index < acpi_gbl_root_table_list.count) {
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
 		is_loaded = (u8)
 		    (acpi_gbl_root_table_list.tables[table_index].flags &
 		     ACPI_TABLE_IS_LOADED);
@@ -616,7 +615,7 @@ void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
 {
 
 	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-	if (table_index < acpi_gbl_root_table_list.count) {
+	if (table_index < acpi_gbl_root_table_list.current_table_count) {
 		if (is_loaded) {
 			acpi_gbl_root_table_list.tables[table_index].flags |=
 			    ACPI_TABLE_IS_LOADED;
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c
index 02723a9fb10..34f9c2bc5e1 100644
--- a/drivers/acpi/acpica/tbutils.c
+++ b/drivers/acpi/acpica/tbutils.c
@@ -158,7 +158,7 @@ acpi_status acpi_tb_initialize_facs(void)
 u8 acpi_tb_tables_loaded(void)
 {
 
-	if (acpi_gbl_root_table_list.count >= 3) {
+	if (acpi_gbl_root_table_list.current_table_count >= 3) {
 		return (TRUE);
 	}
 
@@ -309,7 +309,7 @@ acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length)
 
 	if (checksum) {
 		ACPI_WARNING((AE_INFO,
-			      "Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X",
+			      "Incorrect checksum in table [%4.4s] - 0x%2.2X, should be 0x%2.2X",
 			      table->signature, table->checksum,
 			      (u8) (table->checksum - checksum)));
 
@@ -349,6 +349,84 @@ u8 acpi_tb_checksum(u8 *buffer, u32 length)
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_tb_check_dsdt_header
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Quick compare to check validity of the DSDT. This will detect
+ *              if the DSDT has been replaced from outside the OS and/or if
+ *              the DSDT header has been corrupted.
+ *
+ ******************************************************************************/
+
+void acpi_tb_check_dsdt_header(void)
+{
+
+	/* Compare original length and checksum to current values */
+
+	if (acpi_gbl_original_dsdt_header.length != acpi_gbl_DSDT->length ||
+	    acpi_gbl_original_dsdt_header.checksum != acpi_gbl_DSDT->checksum) {
+		ACPI_ERROR((AE_INFO,
+			    "The DSDT has been corrupted or replaced - old, new headers below"));
+		acpi_tb_print_table_header(0, &acpi_gbl_original_dsdt_header);
+		acpi_tb_print_table_header(0, acpi_gbl_DSDT);
+
+		ACPI_ERROR((AE_INFO,
+			    "Please send DMI info to linux-acpi@vger.kernel.org\n"
+			    "If system does not work as expected, please boot with acpi=copy_dsdt"));
+
+		/* Disable further error messages */
+
+		acpi_gbl_original_dsdt_header.length = acpi_gbl_DSDT->length;
+		acpi_gbl_original_dsdt_header.checksum =
+		    acpi_gbl_DSDT->checksum;
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_copy_dsdt
+ *
+ * PARAMETERS:  table_desc          - Installed table to copy
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Implements a subsystem option to copy the DSDT to local memory.
+ *              Some very bad BIOSs are known to either corrupt the DSDT or
+ *              install a new, bad DSDT. This copy works around the problem.
+ *
+ ******************************************************************************/
+
+struct acpi_table_header *acpi_tb_copy_dsdt(u32 table_index)
+{
+	struct acpi_table_header *new_table;
+	struct acpi_table_desc *table_desc;
+
+	table_desc = &acpi_gbl_root_table_list.tables[table_index];
+
+	new_table = ACPI_ALLOCATE(table_desc->length);
+	if (!new_table) {
+		ACPI_ERROR((AE_INFO, "Could not copy DSDT of length 0x%X",
+			    table_desc->length));
+		return (NULL);
+	}
+
+	ACPI_MEMCPY(new_table, table_desc->pointer, table_desc->length);
+	acpi_tb_delete_table(table_desc);
+	table_desc->pointer = new_table;
+	table_desc->flags = ACPI_TABLE_ORIGIN_ALLOCATED;
+
+	ACPI_INFO((AE_INFO,
+		   "Forced DSDT copy: length 0x%05X copied locally, original unmapped",
+		   new_table->length));
+
+	return (new_table);
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_tb_install_table
  *
  * PARAMETERS:  Address                 - Physical address of DSDT or FACS
@@ -496,7 +574,7 @@ acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size)
 			/* Will truncate 64-bit address to 32 bits, issue warning */
 
 			ACPI_WARNING((AE_INFO,
-				      "64-bit Physical Address in XSDT is too large (%8.8X%8.8X),"
+				      "64-bit Physical Address in XSDT is too large (0x%8.8X%8.8X),"
 				      " truncating",
 				      ACPI_FORMAT_UINT64(address64)));
 		}
@@ -629,14 +707,14 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
 	 */
 	table_entry =
 	    ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header);
-	acpi_gbl_root_table_list.count = 2;
+	acpi_gbl_root_table_list.current_table_count = 2;
 
 	/*
 	 * Initialize the root table array from the RSDT/XSDT
 	 */
 	for (i = 0; i < table_count; i++) {
-		if (acpi_gbl_root_table_list.count >=
-		    acpi_gbl_root_table_list.size) {
+		if (acpi_gbl_root_table_list.current_table_count >=
+		    acpi_gbl_root_table_list.max_table_count) {
 
 			/* There is no more room in the root table array, attempt resize */
 
@@ -646,19 +724,20 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
 					      "Truncating %u table entries!",
 					      (unsigned) (table_count -
 					       (acpi_gbl_root_table_list.
-					       count - 2))));
+							  current_table_count -
+							  2))));
 				break;
 			}
 		}
 
 		/* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
 
-		acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count].
-		    address =
+		acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
+						current_table_count].address =
 		    acpi_tb_get_root_table_entry(table_entry, table_entry_size);
 
 		table_entry += table_entry_size;
-		acpi_gbl_root_table_list.count++;
+		acpi_gbl_root_table_list.current_table_count++;
 	}
 
 	/*
@@ -671,7 +750,7 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
 	 * Complete the initialization of the root table array by examining
 	 * the header of each table
 	 */
-	for (i = 2; i < acpi_gbl_root_table_list.count; i++) {
+	for (i = 2; i < acpi_gbl_root_table_list.current_table_count; i++) {
 		acpi_tb_install_table(acpi_gbl_root_table_list.tables[i].
 				      address, NULL, i);
 
diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index 5217a6159a3..4a8b9e6ea57 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -72,7 +72,7 @@ static int no_auto_ssdt;
 acpi_status acpi_allocate_root_table(u32 initial_table_count)
 {
 
-	acpi_gbl_root_table_list.size = initial_table_count;
+	acpi_gbl_root_table_list.max_table_count = initial_table_count;
 	acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE;
 
 	return (acpi_tb_resize_root_table_list());
@@ -130,7 +130,7 @@ acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
 			    sizeof(struct acpi_table_desc));
 
 		acpi_gbl_root_table_list.tables = initial_table_array;
-		acpi_gbl_root_table_list.size = initial_table_count;
+		acpi_gbl_root_table_list.max_table_count = initial_table_count;
 		acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
 		if (allow_resize) {
 			acpi_gbl_root_table_list.flags |=
@@ -172,6 +172,7 @@ acpi_status acpi_reallocate_root_table(void)
 {
 	struct acpi_table_desc *tables;
 	acpi_size new_size;
+	acpi_size current_size;
 
 	ACPI_FUNCTION_TRACE(acpi_reallocate_root_table);
 
@@ -183,10 +184,17 @@ acpi_status acpi_reallocate_root_table(void)
 		return_ACPI_STATUS(AE_SUPPORT);
 	}
 
-	new_size = ((acpi_size) acpi_gbl_root_table_list.count +
-		    ACPI_ROOT_TABLE_SIZE_INCREMENT) *
+	/*
+	 * Get the current size of the root table and add the default
+	 * increment to create the new table size.
+	 */
+	current_size = (acpi_size)
+	    acpi_gbl_root_table_list.current_table_count *
 	    sizeof(struct acpi_table_desc);
 
+	new_size = current_size +
+	    (ACPI_ROOT_TABLE_SIZE_INCREMENT * sizeof(struct acpi_table_desc));
+
 	/* Create new array and copy the old array */
 
 	tables = ACPI_ALLOCATE_ZEROED(new_size);
@@ -194,10 +202,17 @@ acpi_status acpi_reallocate_root_table(void)
 		return_ACPI_STATUS(AE_NO_MEMORY);
 	}
 
-	ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size);
+	ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, current_size);
 
-	acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count;
+	/*
+	 * Update the root table descriptor. The new size will be the current
+	 * number of tables plus the increment, independent of the reserved
+	 * size of the original table list.
+	 */
 	acpi_gbl_root_table_list.tables = tables;
+	acpi_gbl_root_table_list.max_table_count =
+	    acpi_gbl_root_table_list.current_table_count +
+	    ACPI_ROOT_TABLE_SIZE_INCREMENT;
 	acpi_gbl_root_table_list.flags =
 	    ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE;
 
@@ -278,7 +293,8 @@ acpi_get_table_header(char *signature,
 
 	/* Walk the root table list */
 
-	for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
+	for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count;
+	     i++) {
 		if (!ACPI_COMPARE_NAME
 		    (&(acpi_gbl_root_table_list.tables[i].signature),
 		     signature)) {
@@ -341,7 +357,7 @@ acpi_status acpi_unload_table_id(acpi_owner_id id)
 	ACPI_FUNCTION_TRACE(acpi_unload_table_id);
 
 	/* Find table in the global table list */
-	for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
 		if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
 			continue;
 		}
@@ -391,7 +407,8 @@ acpi_get_table_with_size(char *signature,
 
 	/* Walk the root table list */
 
-	for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
+	for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count;
+	     i++) {
 		if (!ACPI_COMPARE_NAME
 		    (&(acpi_gbl_root_table_list.tables[i].signature),
 		     signature)) {
@@ -459,7 +476,7 @@ acpi_get_table_by_index(u32 table_index, struct acpi_table_header **table)
 
 	/* Validate index */
 
-	if (table_index >= acpi_gbl_root_table_list.count) {
+	if (table_index >= acpi_gbl_root_table_list.current_table_count) {
 		(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 		return_ACPI_STATUS(AE_BAD_PARAMETER);
 	}
@@ -500,16 +517,17 @@ static acpi_status acpi_tb_load_namespace(void)
 {
 	acpi_status status;
 	u32 i;
+	struct acpi_table_header *new_dsdt;
 
 	ACPI_FUNCTION_TRACE(tb_load_namespace);
 
 	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 
 	/*
-	 * Load the namespace. The DSDT is required, but any SSDT and PSDT tables
-	 * are optional.
+	 * Load the namespace. The DSDT is required, but any SSDT and
+	 * PSDT tables are optional. Verify the DSDT.
 	 */
-	if (!acpi_gbl_root_table_list.count ||
+	if (!acpi_gbl_root_table_list.current_table_count ||
 	    !ACPI_COMPARE_NAME(&
 			       (acpi_gbl_root_table_list.
 				tables[ACPI_TABLE_INDEX_DSDT].signature),
@@ -522,17 +540,35 @@ static acpi_status acpi_tb_load_namespace(void)
 		goto unlock_and_exit;
 	}
 
-	/* A valid DSDT is required */
-
-	status =
-	    acpi_tb_verify_table(&acpi_gbl_root_table_list.
-				 tables[ACPI_TABLE_INDEX_DSDT]);
-	if (ACPI_FAILURE(status)) {
+	/*
+	 * Save the DSDT pointer for simple access. This is the mapped memory
+	 * address. We must take care here because the address of the .Tables
+	 * array can change dynamically as tables are loaded at run-time. Note:
+	 * .Pointer field is not validated until after call to acpi_tb_verify_table.
+	 */
+	acpi_gbl_DSDT =
+	    acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer;
 
-		status = AE_NO_ACPI_TABLES;
-		goto unlock_and_exit;
+	/*
+	 * Optionally copy the entire DSDT to local memory (instead of simply
+	 * mapping it.) There are some BIOSs that corrupt or replace the original
+	 * DSDT, creating the need for this option. Default is FALSE, do not copy
+	 * the DSDT.
+	 */
+	if (acpi_gbl_copy_dsdt_locally) {
+		new_dsdt = acpi_tb_copy_dsdt(ACPI_TABLE_INDEX_DSDT);
+		if (new_dsdt) {
+			acpi_gbl_DSDT = new_dsdt;
+		}
 	}
 
+	/*
+	 * Save the original DSDT header for detection of table corruption
+	 * and/or replacement of the DSDT from outside the OS.
+	 */
+	ACPI_MEMCPY(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,
+		    sizeof(struct acpi_table_header));
+
 	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 
 	/* Load and parse tables */
@@ -545,7 +581,7 @@ static acpi_status acpi_tb_load_namespace(void)
 	/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
 
 	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-	for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
+	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
 		if ((!ACPI_COMPARE_NAME
 		     (&(acpi_gbl_root_table_list.tables[i].signature),
 		      ACPI_SIG_SSDT)
diff --git a/drivers/acpi/acpica/tbxfroot.c b/drivers/acpi/acpica/tbxfroot.c
index dda6e8c497d..fd2c07d1d3a 100644
--- a/drivers/acpi/acpica/tbxfroot.c
+++ b/drivers/acpi/acpica/tbxfroot.c
@@ -134,7 +134,7 @@ acpi_status acpi_find_root_pointer(acpi_size *table_address)
 				       ACPI_EBDA_PTR_LENGTH);
 	if (!table_ptr) {
 		ACPI_ERROR((AE_INFO,
-			    "Could not map memory at %8.8X for length %X",
+			    "Could not map memory at 0x%8.8X for length %u",
 			    ACPI_EBDA_PTR_LOCATION, ACPI_EBDA_PTR_LENGTH));
 
 		return_ACPI_STATUS(AE_NO_MEMORY);
@@ -159,7 +159,7 @@ acpi_status acpi_find_root_pointer(acpi_size *table_address)
 					       ACPI_EBDA_WINDOW_SIZE);
 		if (!table_ptr) {
 			ACPI_ERROR((AE_INFO,
-				    "Could not map memory at %8.8X for length %X",
+				    "Could not map memory at 0x%8.8X for length %u",
 				    physical_address, ACPI_EBDA_WINDOW_SIZE));
 
 			return_ACPI_STATUS(AE_NO_MEMORY);
@@ -191,7 +191,7 @@ acpi_status acpi_find_root_pointer(acpi_size *table_address)
 
 	if (!table_ptr) {
 		ACPI_ERROR((AE_INFO,
-			    "Could not map memory at %8.8X for length %X",
+			    "Could not map memory at 0x%8.8X for length %u",
 			    ACPI_HI_RSDP_WINDOW_BASE,
 			    ACPI_HI_RSDP_WINDOW_SIZE));
 
diff --git a/drivers/acpi/acpica/utalloc.c b/drivers/acpi/acpica/utalloc.c
index 3d706b8fd44..8f089628156 100644
--- a/drivers/acpi/acpica/utalloc.c
+++ b/drivers/acpi/acpica/utalloc.c
@@ -340,7 +340,7 @@ void *acpi_ut_allocate(acpi_size size,
 		/* Report allocation error */
 
 		ACPI_WARNING((module, line,
-			      "Could not allocate size %X", (u32) size));
+			      "Could not allocate size %u", (u32) size));
 
 		return_PTR(NULL);
 	}
diff --git a/drivers/acpi/acpica/utcopy.c b/drivers/acpi/acpica/utcopy.c
index 97ec3621e71..6fef83f04bc 100644
--- a/drivers/acpi/acpica/utcopy.c
+++ b/drivers/acpi/acpica/utcopy.c
@@ -677,16 +677,24 @@ acpi_ut_copy_simple_object(union acpi_operand_object *source_desc,
 	u16 reference_count;
 	union acpi_operand_object *next_object;
 	acpi_status status;
+	acpi_size copy_size;
 
 	/* Save fields from destination that we don't want to overwrite */
 
 	reference_count = dest_desc->common.reference_count;
 	next_object = dest_desc->common.next_object;
 
-	/* Copy the entire source object over the destination object */
+	/*
+	 * Copy the entire source object over the destination object.
+	 * Note: Source can be either an operand object or namespace node.
+	 */
+	copy_size = sizeof(union acpi_operand_object);
+	if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_NAMED) {
+		copy_size = sizeof(struct acpi_namespace_node);
+	}
 
-	ACPI_MEMCPY((char *)dest_desc, (char *)source_desc,
-		    sizeof(union acpi_operand_object));
+	ACPI_MEMCPY(ACPI_CAST_PTR(char, dest_desc),
+		    ACPI_CAST_PTR(char, source_desc), copy_size);
 
 	/* Restore the saved fields */
 
diff --git a/drivers/acpi/acpica/utdelete.c b/drivers/acpi/acpica/utdelete.c
index 16b51c69606..ed794cd033e 100644
--- a/drivers/acpi/acpica/utdelete.c
+++ b/drivers/acpi/acpica/utdelete.c
@@ -434,7 +434,7 @@ acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action)
 
 	default:
 
-		ACPI_ERROR((AE_INFO, "Unknown action (%X)", action));
+		ACPI_ERROR((AE_INFO, "Unknown action (0x%X)", action));
 		break;
 	}
 
@@ -444,8 +444,8 @@ acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action)
 	 */
 	if (count > ACPI_MAX_REFERENCE_COUNT) {
 		ACPI_WARNING((AE_INFO,
-			      "Large Reference Count (%X) in object %p", count,
-			      object));
+			      "Large Reference Count (0x%X) in object %p",
+			      count, object));
 	}
 }
 
diff --git a/drivers/acpi/acpica/uteval.c b/drivers/acpi/acpica/uteval.c
index 7f5e734ce7f..6dfdeb65349 100644
--- a/drivers/acpi/acpica/uteval.c
+++ b/drivers/acpi/acpica/uteval.c
@@ -307,7 +307,7 @@ acpi_ut_evaluate_object(struct acpi_namespace_node *prefix_node,
 				  prefix_node, path, AE_TYPE);
 
 		ACPI_ERROR((AE_INFO,
-			    "Type returned from %s was incorrect: %s, expected Btypes: %X",
+			    "Type returned from %s was incorrect: %s, expected Btypes: 0x%X",
 			    path,
 			    acpi_ut_get_object_type_name(info->return_object),
 			    expected_return_btypes));
diff --git a/drivers/acpi/acpica/utglobal.c b/drivers/acpi/acpica/utglobal.c
index eda3e656c4a..66116750a0f 100644
--- a/drivers/acpi/acpica/utglobal.c
+++ b/drivers/acpi/acpica/utglobal.c
@@ -785,6 +785,7 @@ acpi_status acpi_ut_init_globals(void)
 
 	/* Miscellaneous variables */
 
+	acpi_gbl_DSDT = NULL;
 	acpi_gbl_cm_single_step = FALSE;
 	acpi_gbl_db_terminate_threads = FALSE;
 	acpi_gbl_shutdown = FALSE;
diff --git a/drivers/acpi/acpica/utmisc.c b/drivers/acpi/acpica/utmisc.c
index 32982e2ac38..e8d0724ee40 100644
--- a/drivers/acpi/acpica/utmisc.c
+++ b/drivers/acpi/acpica/utmisc.c
@@ -205,7 +205,7 @@ acpi_status acpi_ut_allocate_owner_id(acpi_owner_id * owner_id)
 	/* Guard against multiple allocations of ID to the same location */
 
 	if (*owner_id) {
-		ACPI_ERROR((AE_INFO, "Owner ID [%2.2X] already exists",
+		ACPI_ERROR((AE_INFO, "Owner ID [0x%2.2X] already exists",
 			    *owner_id));
 		return_ACPI_STATUS(AE_ALREADY_EXISTS);
 	}
@@ -315,7 +315,7 @@ void acpi_ut_release_owner_id(acpi_owner_id * owner_id_ptr)
 	/* Zero is not a valid owner_iD */
 
 	if (owner_id == 0) {
-		ACPI_ERROR((AE_INFO, "Invalid OwnerId: %2.2X", owner_id));
+		ACPI_ERROR((AE_INFO, "Invalid OwnerId: 0x%2.2X", owner_id));
 		return_VOID;
 	}
 
@@ -341,7 +341,7 @@ void acpi_ut_release_owner_id(acpi_owner_id * owner_id_ptr)
 		acpi_gbl_owner_id_mask[index] ^= bit;
 	} else {
 		ACPI_ERROR((AE_INFO,
-			    "Release of non-allocated OwnerId: %2.2X",
+			    "Release of non-allocated OwnerId: 0x%2.2X",
 			    owner_id + 1));
 	}
 
diff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c
index 55d014ed6d5..058b3df4827 100644
--- a/drivers/acpi/acpica/utmutex.c
+++ b/drivers/acpi/acpica/utmutex.c
@@ -258,7 +258,7 @@ acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id)
 		acpi_gbl_mutex_info[mutex_id].thread_id = this_thread_id;
 	} else {
 		ACPI_EXCEPTION((AE_INFO, status,
-				"Thread %p could not acquire Mutex [%X]",
+				"Thread %p could not acquire Mutex [0x%X]",
 				ACPI_CAST_PTR(void, this_thread_id), mutex_id));
 	}
 
@@ -297,7 +297,7 @@ acpi_status acpi_ut_release_mutex(acpi_mutex_handle mutex_id)
 	 */
 	if (acpi_gbl_mutex_info[mutex_id].thread_id == ACPI_MUTEX_NOT_ACQUIRED) {
 		ACPI_ERROR((AE_INFO,
-			    "Mutex [%X] is not acquired, cannot release",
+			    "Mutex [0x%X] is not acquired, cannot release",
 			    mutex_id));
 
 		return (AE_NOT_ACQUIRED);
diff --git a/drivers/acpi/acpica/utobject.c b/drivers/acpi/acpica/utobject.c
index 3356f0cb074..fd1fa2749ea 100644
--- a/drivers/acpi/acpica/utobject.c
+++ b/drivers/acpi/acpica/utobject.c
@@ -251,7 +251,7 @@ union acpi_operand_object *acpi_ut_create_buffer_object(acpi_size buffer_size)
 
 		buffer = ACPI_ALLOCATE_ZEROED(buffer_size);
 		if (!buffer) {
-			ACPI_ERROR((AE_INFO, "Could not allocate size %X",
+			ACPI_ERROR((AE_INFO, "Could not allocate size %u",
 				    (u32) buffer_size));
 			acpi_ut_remove_reference(buffer_desc);
 			return_PTR(NULL);
@@ -303,7 +303,7 @@ union acpi_operand_object *acpi_ut_create_string_object(acpi_size string_size)
 	 */
 	string = ACPI_ALLOCATE_ZEROED(string_size + 1);
 	if (!string) {
-		ACPI_ERROR((AE_INFO, "Could not allocate size %X",
+		ACPI_ERROR((AE_INFO, "Could not allocate size %u",
 			    (u32) string_size));
 		acpi_ut_remove_reference(string_desc);
 		return_PTR(NULL);
@@ -533,7 +533,7 @@ acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
 			 */
 			ACPI_ERROR((AE_INFO,
 				    "Cannot convert to external object - "
-				    "unsupported Reference Class [%s] %X in object %p",
+				    "unsupported Reference Class [%s] 0x%X in object %p",
 				    acpi_ut_get_reference_name(internal_object),
 				    internal_object->reference.class,
 				    internal_object));
@@ -545,7 +545,7 @@ acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
 	default:
 
 		ACPI_ERROR((AE_INFO, "Cannot convert to external object - "
-			    "unsupported type [%s] %X in object %p",
+			    "unsupported type [%s] 0x%X in object %p",
 			    acpi_ut_get_object_type_name(internal_object),
 			    internal_object->common.type, internal_object));
 		status = AE_TYPE;
diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
new file mode 100644
index 00000000000..f8c668f27b5
--- /dev/null
+++ b/drivers/acpi/apei/Kconfig
@@ -0,0 +1,30 @@
+config ACPI_APEI
+	bool "ACPI Platform Error Interface (APEI)"
+	depends on X86
+	help
+	  APEI allows to report errors (for example from the chipset)
+	  to the operating system. This improves NMI handling
+	  especially. In addition it supports error serialization and
+	  error injection.
+
+config ACPI_APEI_GHES
+	tristate "APEI Generic Hardware Error Source"
+	depends on ACPI_APEI && X86
+	select ACPI_HED
+	help
+	  Generic Hardware Error Source provides a way to report
+	  platform hardware errors (such as that from chipset). It
+	  works in so called "Firmware First" mode, that is, hardware
+	  errors are reported to firmware firstly, then reported to
+	  Linux by firmware. This way, some non-standard hardware
+	  error registers or non-standard hardware link can be checked
+	  by firmware to produce more valuable hardware error
+	  information for Linux.
+
+config ACPI_APEI_EINJ
+	tristate "APEI Error INJection (EINJ)"
+	depends on ACPI_APEI && DEBUG_FS
+	help
+	  EINJ provides a hardware error injection mechanism, it is
+	  mainly used for debugging and testing the other parts of
+	  APEI and some other RAS features.
diff --git a/drivers/acpi/apei/Makefile b/drivers/acpi/apei/Makefile
new file mode 100644
index 00000000000..b13b03a1778
--- /dev/null
+++ b/drivers/acpi/apei/Makefile
@@ -0,0 +1,5 @@
+obj-$(CONFIG_ACPI_APEI)		+= apei.o
+obj-$(CONFIG_ACPI_APEI_GHES)	+= ghes.o
+obj-$(CONFIG_ACPI_APEI_EINJ)	+= einj.o
+
+apei-y := apei-base.o hest.o cper.o erst.o
diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
new file mode 100644
index 00000000000..db3946e9c66
--- /dev/null
+++ b/drivers/acpi/apei/apei-base.c
@@ -0,0 +1,593 @@
+/*
+ * apei-base.c - ACPI Platform Error Interface (APEI) supporting
+ * infrastructure
+ *
+ * APEI allows to report errors (for example from the chipset) to the
+ * the operating system. This improves NMI handling especially. In
+ * addition it supports error serialization and error injection.
+ *
+ * For more information about APEI, please refer to ACPI Specification
+ * version 4.0, chapter 17.
+ *
+ * This file has Common functions used by more than one APEI table,
+ * including framework of interpreter for ERST and EINJ; resource
+ * management for APEI registers.
+ *
+ * Copyright (C) 2009, Intel Corp.
+ *	Author: Huang Ying <ying.huang@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
+#include <linux/kref.h>
+#include <linux/rculist.h>
+#include <linux/interrupt.h>
+#include <linux/debugfs.h>
+#include <acpi/atomicio.h>
+
+#include "apei-internal.h"
+
+#define APEI_PFX "APEI: "
+
+/*
+ * APEI ERST (Error Record Serialization Table) and EINJ (Error
+ * INJection) interpreter framework.
+ */
+
+#define APEI_EXEC_PRESERVE_REGISTER	0x1
+
+void apei_exec_ctx_init(struct apei_exec_context *ctx,
+			struct apei_exec_ins_type *ins_table,
+			u32 instructions,
+			struct acpi_whea_header *action_table,
+			u32 entries)
+{
+	ctx->ins_table = ins_table;
+	ctx->instructions = instructions;
+	ctx->action_table = action_table;
+	ctx->entries = entries;
+}
+EXPORT_SYMBOL_GPL(apei_exec_ctx_init);
+
+int __apei_exec_read_register(struct acpi_whea_header *entry, u64 *val)
+{
+	int rc;
+
+	rc = acpi_atomic_read(val, &entry->register_region);
+	if (rc)
+		return rc;
+	*val >>= entry->register_region.bit_offset;
+	*val &= entry->mask;
+
+	return 0;
+}
+
+int apei_exec_read_register(struct apei_exec_context *ctx,
+			    struct acpi_whea_header *entry)
+{
+	int rc;
+	u64 val = 0;
+
+	rc = __apei_exec_read_register(entry, &val);
+	if (rc)
+		return rc;
+	ctx->value = val;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(apei_exec_read_register);
+
+int apei_exec_read_register_value(struct apei_exec_context *ctx,
+				  struct acpi_whea_header *entry)
+{
+	int rc;
+
+	rc = apei_exec_read_register(ctx, entry);
+	if (rc)
+		return rc;
+	ctx->value = (ctx->value == entry->value);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(apei_exec_read_register_value);
+
+int __apei_exec_write_register(struct acpi_whea_header *entry, u64 val)
+{
+	int rc;
+
+	val &= entry->mask;
+	val <<= entry->register_region.bit_offset;
+	if (entry->flags & APEI_EXEC_PRESERVE_REGISTER) {
+		u64 valr = 0;
+		rc = acpi_atomic_read(&valr, &entry->register_region);
+		if (rc)
+			return rc;
+		valr &= ~(entry->mask << entry->register_region.bit_offset);
+		val |= valr;
+	}
+	rc = acpi_atomic_write(val, &entry->register_region);
+
+	return rc;
+}
+
+int apei_exec_write_register(struct apei_exec_context *ctx,
+			     struct acpi_whea_header *entry)
+{
+	return __apei_exec_write_register(entry, ctx->value);
+}
+EXPORT_SYMBOL_GPL(apei_exec_write_register);
+
+int apei_exec_write_register_value(struct apei_exec_context *ctx,
+				   struct acpi_whea_header *entry)
+{
+	int rc;
+
+	ctx->value = entry->value;
+	rc = apei_exec_write_register(ctx, entry);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(apei_exec_write_register_value);
+
+int apei_exec_noop(struct apei_exec_context *ctx,
+		   struct acpi_whea_header *entry)
+{
+	return 0;
+}
+EXPORT_SYMBOL_GPL(apei_exec_noop);
+
+/*
+ * Interpret the specified action. Go through whole action table,
+ * execute all instructions belong to the action.
+ */
+int apei_exec_run(struct apei_exec_context *ctx, u8 action)
+{
+	int rc;
+	u32 i, ip;
+	struct acpi_whea_header *entry;
+	apei_exec_ins_func_t run;
+
+	ctx->ip = 0;
+
+	/*
+	 * "ip" is the instruction pointer of current instruction,
+	 * "ctx->ip" specifies the next instruction to executed,
+	 * instruction "run" function may change the "ctx->ip" to
+	 * implement "goto" semantics.
+	 */
+rewind:
+	ip = 0;
+	for (i = 0; i < ctx->entries; i++) {
+		entry = &ctx->action_table[i];
+		if (entry->action != action)
+			continue;
+		if (ip == ctx->ip) {
+			if (entry->instruction >= ctx->instructions ||
+			    !ctx->ins_table[entry->instruction].run) {
+				pr_warning(FW_WARN APEI_PFX
+			"Invalid action table, unknown instruction type: %d\n",
+					   entry->instruction);
+				return -EINVAL;
+			}
+			run = ctx->ins_table[entry->instruction].run;
+			rc = run(ctx, entry);
+			if (rc < 0)
+				return rc;
+			else if (rc != APEI_EXEC_SET_IP)
+				ctx->ip++;
+		}
+		ip++;
+		if (ctx->ip < ip)
+			goto rewind;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(apei_exec_run);
+
+typedef int (*apei_exec_entry_func_t)(struct apei_exec_context *ctx,
+				      struct acpi_whea_header *entry,
+				      void *data);
+
+static int apei_exec_for_each_entry(struct apei_exec_context *ctx,
+				    apei_exec_entry_func_t func,
+				    void *data,
+				    int *end)
+{
+	u8 ins;
+	int i, rc;
+	struct acpi_whea_header *entry;
+	struct apei_exec_ins_type *ins_table = ctx->ins_table;
+
+	for (i = 0; i < ctx->entries; i++) {
+		entry = ctx->action_table + i;
+		ins = entry->instruction;
+		if (end)
+			*end = i;
+		if (ins >= ctx->instructions || !ins_table[ins].run) {
+			pr_warning(FW_WARN APEI_PFX
+			"Invalid action table, unknown instruction type: %d\n",
+				   ins);
+			return -EINVAL;
+		}
+		rc = func(ctx, entry, data);
+		if (rc)
+			return rc;
+	}
+
+	return 0;
+}
+
+static int pre_map_gar_callback(struct apei_exec_context *ctx,
+				struct acpi_whea_header *entry,
+				void *data)
+{
+	u8 ins = entry->instruction;
+
+	if (ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER)
+		return acpi_pre_map_gar(&entry->register_region);
+
+	return 0;
+}
+
+/*
+ * Pre-map all GARs in action table to make it possible to access them
+ * in NMI handler.
+ */
+int apei_exec_pre_map_gars(struct apei_exec_context *ctx)
+{
+	int rc, end;
+
+	rc = apei_exec_for_each_entry(ctx, pre_map_gar_callback,
+				      NULL, &end);
+	if (rc) {
+		struct apei_exec_context ctx_unmap;
+		memcpy(&ctx_unmap, ctx, sizeof(*ctx));
+		ctx_unmap.entries = end;
+		apei_exec_post_unmap_gars(&ctx_unmap);
+	}
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(apei_exec_pre_map_gars);
+
+static int post_unmap_gar_callback(struct apei_exec_context *ctx,
+				   struct acpi_whea_header *entry,
+				   void *data)
+{
+	u8 ins = entry->instruction;
+
+	if (ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER)
+		acpi_post_unmap_gar(&entry->register_region);
+
+	return 0;
+}
+
+/* Post-unmap all GAR in action table. */
+int apei_exec_post_unmap_gars(struct apei_exec_context *ctx)
+{
+	return apei_exec_for_each_entry(ctx, post_unmap_gar_callback,
+					NULL, NULL);
+}
+EXPORT_SYMBOL_GPL(apei_exec_post_unmap_gars);
+
+/*
+ * Resource management for GARs in APEI
+ */
+struct apei_res {
+	struct list_head list;
+	unsigned long start;
+	unsigned long end;
+};
+
+/* Collect all resources requested, to avoid conflict */
+struct apei_resources apei_resources_all = {
+	.iomem = LIST_HEAD_INIT(apei_resources_all.iomem),
+	.ioport = LIST_HEAD_INIT(apei_resources_all.ioport),
+};
+
+static int apei_res_add(struct list_head *res_list,
+			unsigned long start, unsigned long size)
+{
+	struct apei_res *res, *resn, *res_ins = NULL;
+	unsigned long end = start + size;
+
+	if (end <= start)
+		return 0;
+repeat:
+	list_for_each_entry_safe(res, resn, res_list, list) {
+		if (res->start > end || res->end < start)
+			continue;
+		else if (end <= res->end && start >= res->start) {
+			kfree(res_ins);
+			return 0;
+		}
+		list_del(&res->list);
+		res->start = start = min(res->start, start);
+		res->end = end = max(res->end, end);
+		kfree(res_ins);
+		res_ins = res;
+		goto repeat;
+	}
+
+	if (res_ins)
+		list_add(&res_ins->list, res_list);
+	else {
+		res_ins = kmalloc(sizeof(*res), GFP_KERNEL);
+		if (!res_ins)
+			return -ENOMEM;
+		res_ins->start = start;
+		res_ins->end = end;
+		list_add(&res_ins->list, res_list);
+	}
+
+	return 0;
+}
+
+static int apei_res_sub(struct list_head *res_list1,
+			struct list_head *res_list2)
+{
+	struct apei_res *res1, *resn1, *res2, *res;
+	res1 = list_entry(res_list1->next, struct apei_res, list);
+	resn1 = list_entry(res1->list.next, struct apei_res, list);
+	while (&res1->list != res_list1) {
+		list_for_each_entry(res2, res_list2, list) {
+			if (res1->start >= res2->end ||
+			    res1->end <= res2->start)
+				continue;
+			else if (res1->end <= res2->end &&
+				 res1->start >= res2->start) {
+				list_del(&res1->list);
+				kfree(res1);
+				break;
+			} else if (res1->end > res2->end &&
+				   res1->start < res2->start) {
+				res = kmalloc(sizeof(*res), GFP_KERNEL);
+				if (!res)
+					return -ENOMEM;
+				res->start = res2->end;
+				res->end = res1->end;
+				res1->end = res2->start;
+				list_add(&res->list, &res1->list);
+				resn1 = res;
+			} else {
+				if (res1->start < res2->start)
+					res1->end = res2->start;
+				else
+					res1->start = res2->end;
+			}
+		}
+		res1 = resn1;
+		resn1 = list_entry(resn1->list.next, struct apei_res, list);
+	}
+
+	return 0;
+}
+
+static void apei_res_clean(struct list_head *res_list)
+{
+	struct apei_res *res, *resn;
+
+	list_for_each_entry_safe(res, resn, res_list, list) {
+		list_del(&res->list);
+		kfree(res);
+	}
+}
+
+void apei_resources_fini(struct apei_resources *resources)
+{
+	apei_res_clean(&resources->iomem);
+	apei_res_clean(&resources->ioport);
+}
+EXPORT_SYMBOL_GPL(apei_resources_fini);
+
+static int apei_resources_merge(struct apei_resources *resources1,
+				struct apei_resources *resources2)
+{
+	int rc;
+	struct apei_res *res;
+
+	list_for_each_entry(res, &resources2->iomem, list) {
+		rc = apei_res_add(&resources1->iomem, res->start,
+				  res->end - res->start);
+		if (rc)
+			return rc;
+	}
+	list_for_each_entry(res, &resources2->ioport, list) {
+		rc = apei_res_add(&resources1->ioport, res->start,
+				  res->end - res->start);
+		if (rc)
+			return rc;
+	}
+
+	return 0;
+}
+
+/*
+ * EINJ has two groups of GARs (EINJ table entry and trigger table
+ * entry), so common resources are subtracted from the trigger table
+ * resources before the second requesting.
+ */
+int apei_resources_sub(struct apei_resources *resources1,
+		       struct apei_resources *resources2)
+{
+	int rc;
+
+	rc = apei_res_sub(&resources1->iomem, &resources2->iomem);
+	if (rc)
+		return rc;
+	return apei_res_sub(&resources1->ioport, &resources2->ioport);
+}
+EXPORT_SYMBOL_GPL(apei_resources_sub);
+
+/*
+ * IO memory/port rersource management mechanism is used to check
+ * whether memory/port area used by GARs conflicts with normal memory
+ * or IO memory/port of devices.
+ */
+int apei_resources_request(struct apei_resources *resources,
+			   const char *desc)
+{
+	struct apei_res *res, *res_bak;
+	struct resource *r;
+
+	apei_resources_sub(resources, &apei_resources_all);
+
+	list_for_each_entry(res, &resources->iomem, list) {
+		r = request_mem_region(res->start, res->end - res->start,
+				       desc);
+		if (!r) {
+			pr_err(APEI_PFX
+		"Can not request iomem region <%016llx-%016llx> for GARs.\n",
+			       (unsigned long long)res->start,
+			       (unsigned long long)res->end);
+			res_bak = res;
+			goto err_unmap_iomem;
+		}
+	}
+
+	list_for_each_entry(res, &resources->ioport, list) {
+		r = request_region(res->start, res->end - res->start, desc);
+		if (!r) {
+			pr_err(APEI_PFX
+		"Can not request ioport region <%016llx-%016llx> for GARs.\n",
+			       (unsigned long long)res->start,
+			       (unsigned long long)res->end);
+			res_bak = res;
+			goto err_unmap_ioport;
+		}
+	}
+
+	apei_resources_merge(&apei_resources_all, resources);
+
+	return 0;
+err_unmap_ioport:
+	list_for_each_entry(res, &resources->ioport, list) {
+		if (res == res_bak)
+			break;
+		release_mem_region(res->start, res->end - res->start);
+	}
+	res_bak = NULL;
+err_unmap_iomem:
+	list_for_each_entry(res, &resources->iomem, list) {
+		if (res == res_bak)
+			break;
+		release_region(res->start, res->end - res->start);
+	}
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(apei_resources_request);
+
+void apei_resources_release(struct apei_resources *resources)
+{
+	struct apei_res *res;
+
+	list_for_each_entry(res, &resources->iomem, list)
+		release_mem_region(res->start, res->end - res->start);
+	list_for_each_entry(res, &resources->ioport, list)
+		release_region(res->start, res->end - res->start);
+
+	apei_resources_sub(&apei_resources_all, resources);
+}
+EXPORT_SYMBOL_GPL(apei_resources_release);
+
+static int apei_check_gar(struct acpi_generic_address *reg, u64 *paddr)
+{
+	u32 width, space_id;
+
+	width = reg->bit_width;
+	space_id = reg->space_id;
+	/* Handle possible alignment issues */
+	memcpy(paddr, &reg->address, sizeof(*paddr));
+	if (!*paddr) {
+		pr_warning(FW_BUG APEI_PFX
+			   "Invalid physical address in GAR [0x%llx/%u/%u]\n",
+			   *paddr, width, space_id);
+		return -EINVAL;
+	}
+
+	if ((width != 8) && (width != 16) && (width != 32) && (width != 64)) {
+		pr_warning(FW_BUG APEI_PFX
+			   "Invalid bit width in GAR [0x%llx/%u/%u]\n",
+			   *paddr, width, space_id);
+		return -EINVAL;
+	}
+
+	if (space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY &&
+	    space_id != ACPI_ADR_SPACE_SYSTEM_IO) {
+		pr_warning(FW_BUG APEI_PFX
+			   "Invalid address space type in GAR [0x%llx/%u/%u]\n",
+			   *paddr, width, space_id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int collect_res_callback(struct apei_exec_context *ctx,
+				struct acpi_whea_header *entry,
+				void *data)
+{
+	struct apei_resources *resources = data;
+	struct acpi_generic_address *reg = &entry->register_region;
+	u8 ins = entry->instruction;
+	u64 paddr;
+	int rc;
+
+	if (!(ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER))
+		return 0;
+
+	rc = apei_check_gar(reg, &paddr);
+	if (rc)
+		return rc;
+
+	switch (reg->space_id) {
+	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+		return apei_res_add(&resources->iomem, paddr,
+				    reg->bit_width / 8);
+	case ACPI_ADR_SPACE_SYSTEM_IO:
+		return apei_res_add(&resources->ioport, paddr,
+				    reg->bit_width / 8);
+	default:
+		return -EINVAL;
+	}
+}
+
+/*
+ * Same register may be used by multiple instructions in GARs, so
+ * resources are collected before requesting.
+ */
+int apei_exec_collect_resources(struct apei_exec_context *ctx,
+				struct apei_resources *resources)
+{
+	return apei_exec_for_each_entry(ctx, collect_res_callback,
+					resources, NULL);
+}
+EXPORT_SYMBOL_GPL(apei_exec_collect_resources);
+
+struct dentry *apei_get_debugfs_dir(void)
+{
+	static struct dentry *dapei;
+
+	if (!dapei)
+		dapei = debugfs_create_dir("apei", NULL);
+
+	return dapei;
+}
+EXPORT_SYMBOL_GPL(apei_get_debugfs_dir);
diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
new file mode 100644
index 00000000000..18df1e94027
--- /dev/null
+++ b/drivers/acpi/apei/apei-internal.h
@@ -0,0 +1,114 @@
+/*
+ * apei-internal.h - ACPI Platform Error Interface internal
+ * definations.
+ */
+
+#ifndef APEI_INTERNAL_H
+#define APEI_INTERNAL_H
+
+#include <linux/cper.h>
+
+struct apei_exec_context;
+
+typedef int (*apei_exec_ins_func_t)(struct apei_exec_context *ctx,
+				    struct acpi_whea_header *entry);
+
+#define APEI_EXEC_INS_ACCESS_REGISTER	0x0001
+
+struct apei_exec_ins_type {
+	u32 flags;
+	apei_exec_ins_func_t run;
+};
+
+struct apei_exec_context {
+	u32 ip;
+	u64 value;
+	u64 var1;
+	u64 var2;
+	u64 src_base;
+	u64 dst_base;
+	struct apei_exec_ins_type *ins_table;
+	u32 instructions;
+	struct acpi_whea_header *action_table;
+	u32 entries;
+};
+
+void apei_exec_ctx_init(struct apei_exec_context *ctx,
+			struct apei_exec_ins_type *ins_table,
+			u32 instructions,
+			struct acpi_whea_header *action_table,
+			u32 entries);
+
+static inline void apei_exec_ctx_set_input(struct apei_exec_context *ctx,
+					   u64 input)
+{
+	ctx->value = input;
+}
+
+static inline u64 apei_exec_ctx_get_output(struct apei_exec_context *ctx)
+{
+	return ctx->value;
+}
+
+int apei_exec_run(struct apei_exec_context *ctx, u8 action);
+
+/* Common instruction implementation */
+
+/* IP has been set in instruction function */
+#define APEI_EXEC_SET_IP	1
+
+int __apei_exec_read_register(struct acpi_whea_header *entry, u64 *val);
+int __apei_exec_write_register(struct acpi_whea_header *entry, u64 val);
+int apei_exec_read_register(struct apei_exec_context *ctx,
+			    struct acpi_whea_header *entry);
+int apei_exec_read_register_value(struct apei_exec_context *ctx,
+				  struct acpi_whea_header *entry);
+int apei_exec_write_register(struct apei_exec_context *ctx,
+			     struct acpi_whea_header *entry);
+int apei_exec_write_register_value(struct apei_exec_context *ctx,
+				   struct acpi_whea_header *entry);
+int apei_exec_noop(struct apei_exec_context *ctx,
+		   struct acpi_whea_header *entry);
+int apei_exec_pre_map_gars(struct apei_exec_context *ctx);
+int apei_exec_post_unmap_gars(struct apei_exec_context *ctx);
+
+struct apei_resources {
+	struct list_head iomem;
+	struct list_head ioport;
+};
+
+static inline void apei_resources_init(struct apei_resources *resources)
+{
+	INIT_LIST_HEAD(&resources->iomem);
+	INIT_LIST_HEAD(&resources->ioport);
+}
+
+void apei_resources_fini(struct apei_resources *resources);
+int apei_resources_sub(struct apei_resources *resources1,
+		       struct apei_resources *resources2);
+int apei_resources_request(struct apei_resources *resources,
+			   const char *desc);
+void apei_resources_release(struct apei_resources *resources);
+int apei_exec_collect_resources(struct apei_exec_context *ctx,
+				struct apei_resources *resources);
+
+struct dentry;
+struct dentry *apei_get_debugfs_dir(void);
+
+#define apei_estatus_for_each_section(estatus, section)			\
+	for (section = (struct acpi_hest_generic_data *)(estatus + 1);	\
+	     (void *)section - (void *)estatus < estatus->data_length;	\
+	     section = (void *)(section+1) + section->error_data_length)
+
+static inline u32 apei_estatus_len(struct acpi_hest_generic_status *estatus)
+{
+	if (estatus->raw_data_length)
+		return estatus->raw_data_offset + \
+			estatus->raw_data_length;
+	else
+		return sizeof(*estatus) + estatus->data_length;
+}
+
+int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus);
+int apei_estatus_check(const struct acpi_hest_generic_status *estatus);
+#endif
diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
new file mode 100644
index 00000000000..f4cf2fc4c8c
--- /dev/null
+++ b/drivers/acpi/apei/cper.c
@@ -0,0 +1,84 @@
+/*
+ * UEFI Common Platform Error Record (CPER) support
+ *
+ * Copyright (C) 2010, Intel Corp.
+ *	Author: Huang Ying <ying.huang@intel.com>
+ *
+ * CPER is the format used to describe platform hardware error by
+ * various APEI tables, such as ERST, BERT and HEST etc.
+ *
+ * For more information about CPER, please refer to Appendix N of UEFI
+ * Specification version 2.3.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/cper.h>
+#include <linux/acpi.h>
+
+/*
+ * CPER record ID need to be unique even after reboot, because record
+ * ID is used as index for ERST storage, while CPER records from
+ * multiple boot may co-exist in ERST.
+ */
+u64 cper_next_record_id(void)
+{
+	static atomic64_t seq;
+
+	if (!atomic64_read(&seq))
+		atomic64_set(&seq, ((u64)get_seconds()) << 32);
+
+	return atomic64_inc_return(&seq);
+}
+EXPORT_SYMBOL_GPL(cper_next_record_id);
+
+int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus)
+{
+	if (estatus->data_length &&
+	    estatus->data_length < sizeof(struct acpi_hest_generic_data))
+		return -EINVAL;
+	if (estatus->raw_data_length &&
+	    estatus->raw_data_offset < sizeof(*estatus) + estatus->data_length)
+		return -EINVAL;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(apei_estatus_check_header);
+
+int apei_estatus_check(const struct acpi_hest_generic_status *estatus)
+{
+	struct acpi_hest_generic_data *gdata;
+	unsigned int data_len, gedata_len;
+	int rc;
+
+	rc = apei_estatus_check_header(estatus);
+	if (rc)
+		return rc;
+	data_len = estatus->data_length;
+	gdata = (struct acpi_hest_generic_data *)(estatus + 1);
+	while (data_len > sizeof(*gdata)) {
+		gedata_len = gdata->error_data_length;
+		if (gedata_len > data_len - sizeof(*gdata))
+			return -EINVAL;
+		data_len -= gedata_len + sizeof(*gdata);
+	}
+	if (data_len)
+		return -EINVAL;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(apei_estatus_check);
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
new file mode 100644
index 00000000000..465c885938e
--- /dev/null
+++ b/drivers/acpi/apei/einj.c
@@ -0,0 +1,548 @@
+/*
+ * APEI Error INJection support
+ *
+ * EINJ provides a hardware error injection mechanism, this is useful
+ * for debugging and testing of other APEI and RAS features.
+ *
+ * For more information about EINJ, please refer to ACPI Specification
+ * version 4.0, section 17.5.
+ *
+ * Copyright 2009-2010 Intel Corp.
+ *   Author: Huang Ying <ying.huang@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/nmi.h>
+#include <linux/delay.h>
+#include <acpi/acpi.h>
+
+#include "apei-internal.h"
+
+#define EINJ_PFX "EINJ: "
+
+#define SPIN_UNIT		100			/* 100ns */
+/* Firmware should respond within 1 miliseconds */
+#define FIRMWARE_TIMEOUT	(1 * NSEC_PER_MSEC)
+
+/*
+ * Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the
+ * EINJ table through an unpublished extension. Use with caution as
+ * most will ignore the parameter and make their own choice of address
+ * for error injection.
+ */
+struct einj_parameter {
+	u64 type;
+	u64 reserved1;
+	u64 reserved2;
+	u64 param1;
+	u64 param2;
+};
+
+#define EINJ_OP_BUSY			0x1
+#define EINJ_STATUS_SUCCESS		0x0
+#define EINJ_STATUS_FAIL		0x1
+#define EINJ_STATUS_INVAL		0x2
+
+#define EINJ_TAB_ENTRY(tab)						\
+	((struct acpi_whea_header *)((char *)(tab) +			\
+				    sizeof(struct acpi_table_einj)))
+
+static struct acpi_table_einj *einj_tab;
+
+static struct apei_resources einj_resources;
+
+static struct apei_exec_ins_type einj_ins_type[] = {
+	[ACPI_EINJ_READ_REGISTER] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run   = apei_exec_read_register,
+	},
+	[ACPI_EINJ_READ_REGISTER_VALUE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run   = apei_exec_read_register_value,
+	},
+	[ACPI_EINJ_WRITE_REGISTER] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run   = apei_exec_write_register,
+	},
+	[ACPI_EINJ_WRITE_REGISTER_VALUE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run   = apei_exec_write_register_value,
+	},
+	[ACPI_EINJ_NOOP] = {
+		.flags = 0,
+		.run   = apei_exec_noop,
+	},
+};
+
+/*
+ * Prevent EINJ interpreter to run simultaneously, because the
+ * corresponding firmware implementation may not work properly when
+ * invoked simultaneously.
+ */
+static DEFINE_MUTEX(einj_mutex);
+
+static struct einj_parameter *einj_param;
+
+static void einj_exec_ctx_init(struct apei_exec_context *ctx)
+{
+	apei_exec_ctx_init(ctx, einj_ins_type, ARRAY_SIZE(einj_ins_type),
+			   EINJ_TAB_ENTRY(einj_tab), einj_tab->entries);
+}
+
+static int __einj_get_available_error_type(u32 *type)
+{
+	struct apei_exec_context ctx;
+	int rc;
+
+	einj_exec_ctx_init(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE);
+	if (rc)
+		return rc;
+	*type = apei_exec_ctx_get_output(&ctx);
+
+	return 0;
+}
+
+/* Get error injection capabilities of the platform */
+static int einj_get_available_error_type(u32 *type)
+{
+	int rc;
+
+	mutex_lock(&einj_mutex);
+	rc = __einj_get_available_error_type(type);
+	mutex_unlock(&einj_mutex);
+
+	return rc;
+}
+
+static int einj_timedout(u64 *t)
+{
+	if ((s64)*t < SPIN_UNIT) {
+		pr_warning(FW_WARN EINJ_PFX
+			   "Firmware does not respond in time\n");
+		return 1;
+	}
+	*t -= SPIN_UNIT;
+	ndelay(SPIN_UNIT);
+	touch_nmi_watchdog();
+	return 0;
+}
+
+static u64 einj_get_parameter_address(void)
+{
+	int i;
+	u64 paddr = 0;
+	struct acpi_whea_header *entry;
+
+	entry = EINJ_TAB_ENTRY(einj_tab);
+	for (i = 0; i < einj_tab->entries; i++) {
+		if (entry->action == ACPI_EINJ_SET_ERROR_TYPE &&
+		    entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
+		    entry->register_region.space_id ==
+		    ACPI_ADR_SPACE_SYSTEM_MEMORY)
+			memcpy(&paddr, &entry->register_region.address,
+			       sizeof(paddr));
+		entry++;
+	}
+
+	return paddr;
+}
+
+/* do sanity check to trigger table */
+static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab)
+{
+	if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger))
+		return -EINVAL;
+	if (trigger_tab->table_size > PAGE_SIZE ||
+	    trigger_tab->table_size <= trigger_tab->header_size)
+		return -EINVAL;
+	if (trigger_tab->entry_count !=
+	    (trigger_tab->table_size - trigger_tab->header_size) /
+	    sizeof(struct acpi_einj_entry))
+		return -EINVAL;
+
+	return 0;
+}
+
+/* Execute instructions in trigger error action table */
+static int __einj_error_trigger(u64 trigger_paddr)
+{
+	struct acpi_einj_trigger *trigger_tab = NULL;
+	struct apei_exec_context trigger_ctx;
+	struct apei_resources trigger_resources;
+	struct acpi_whea_header *trigger_entry;
+	struct resource *r;
+	u32 table_size;
+	int rc = -EIO;
+
+	r = request_mem_region(trigger_paddr, sizeof(*trigger_tab),
+			       "APEI EINJ Trigger Table");
+	if (!r) {
+		pr_err(EINJ_PFX
+	"Can not request iomem region <%016llx-%016llx> for Trigger table.\n",
+		       (unsigned long long)trigger_paddr,
+		       (unsigned long long)trigger_paddr+sizeof(*trigger_tab));
+		goto out;
+	}
+	trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab));
+	if (!trigger_tab) {
+		pr_err(EINJ_PFX "Failed to map trigger table!\n");
+		goto out_rel_header;
+	}
+	rc = einj_check_trigger_header(trigger_tab);
+	if (rc) {
+		pr_warning(FW_BUG EINJ_PFX
+			   "The trigger error action table is invalid\n");
+		goto out_rel_header;
+	}
+	rc = -EIO;
+	table_size = trigger_tab->table_size;
+	r = request_mem_region(trigger_paddr + sizeof(*trigger_tab),
+			       table_size - sizeof(*trigger_tab),
+			       "APEI EINJ Trigger Table");
+	if (!r) {
+		pr_err(EINJ_PFX
+"Can not request iomem region <%016llx-%016llx> for Trigger Table Entry.\n",
+		       (unsigned long long)trigger_paddr+sizeof(*trigger_tab),
+		       (unsigned long long)trigger_paddr + table_size);
+		goto out_rel_header;
+	}
+	iounmap(trigger_tab);
+	trigger_tab = ioremap_cache(trigger_paddr, table_size);
+	if (!trigger_tab) {
+		pr_err(EINJ_PFX "Failed to map trigger table!\n");
+		goto out_rel_entry;
+	}
+	trigger_entry = (struct acpi_whea_header *)
+		((char *)trigger_tab + sizeof(struct acpi_einj_trigger));
+	apei_resources_init(&trigger_resources);
+	apei_exec_ctx_init(&trigger_ctx, einj_ins_type,
+			   ARRAY_SIZE(einj_ins_type),
+			   trigger_entry, trigger_tab->entry_count);
+	rc = apei_exec_collect_resources(&trigger_ctx, &trigger_resources);
+	if (rc)
+		goto out_fini;
+	rc = apei_resources_sub(&trigger_resources, &einj_resources);
+	if (rc)
+		goto out_fini;
+	rc = apei_resources_request(&trigger_resources, "APEI EINJ Trigger");
+	if (rc)
+		goto out_fini;
+	rc = apei_exec_pre_map_gars(&trigger_ctx);
+	if (rc)
+		goto out_release;
+
+	rc = apei_exec_run(&trigger_ctx, ACPI_EINJ_TRIGGER_ERROR);
+
+	apei_exec_post_unmap_gars(&trigger_ctx);
+out_release:
+	apei_resources_release(&trigger_resources);
+out_fini:
+	apei_resources_fini(&trigger_resources);
+out_rel_entry:
+	release_mem_region(trigger_paddr + sizeof(*trigger_tab),
+			   table_size - sizeof(*trigger_tab));
+out_rel_header:
+	release_mem_region(trigger_paddr, sizeof(*trigger_tab));
+out:
+	if (trigger_tab)
+		iounmap(trigger_tab);
+
+	return rc;
+}
+
+static int __einj_error_inject(u32 type, u64 param1, u64 param2)
+{
+	struct apei_exec_context ctx;
+	u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT;
+	int rc;
+
+	einj_exec_ctx_init(&ctx);
+
+	rc = apei_exec_run(&ctx, ACPI_EINJ_BEGIN_OPERATION);
+	if (rc)
+		return rc;
+	apei_exec_ctx_set_input(&ctx, type);
+	rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
+	if (rc)
+		return rc;
+	if (einj_param) {
+		writeq(param1, &einj_param->param1);
+		writeq(param2, &einj_param->param2);
+	}
+	rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION);
+	if (rc)
+		return rc;
+	for (;;) {
+		rc = apei_exec_run(&ctx, ACPI_EINJ_CHECK_BUSY_STATUS);
+		if (rc)
+			return rc;
+		val = apei_exec_ctx_get_output(&ctx);
+		if (!(val & EINJ_OP_BUSY))
+			break;
+		if (einj_timedout(&timeout))
+			return -EIO;
+	}
+	rc = apei_exec_run(&ctx, ACPI_EINJ_GET_COMMAND_STATUS);
+	if (rc)
+		return rc;
+	val = apei_exec_ctx_get_output(&ctx);
+	if (val != EINJ_STATUS_SUCCESS)
+		return -EBUSY;
+
+	rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE);
+	if (rc)
+		return rc;
+	trigger_paddr = apei_exec_ctx_get_output(&ctx);
+	rc = __einj_error_trigger(trigger_paddr);
+	if (rc)
+		return rc;
+	rc = apei_exec_run(&ctx, ACPI_EINJ_END_OPERATION);
+
+	return rc;
+}
+
+/* Inject the specified hardware error */
+static int einj_error_inject(u32 type, u64 param1, u64 param2)
+{
+	int rc;
+
+	mutex_lock(&einj_mutex);
+	rc = __einj_error_inject(type, param1, param2);
+	mutex_unlock(&einj_mutex);
+
+	return rc;
+}
+
+static u32 error_type;
+static u64 error_param1;
+static u64 error_param2;
+static struct dentry *einj_debug_dir;
+
+static int available_error_type_show(struct seq_file *m, void *v)
+{
+	int rc;
+	u32 available_error_type = 0;
+
+	rc = einj_get_available_error_type(&available_error_type);
+	if (rc)
+		return rc;
+	if (available_error_type & 0x0001)
+		seq_printf(m, "0x00000001\tProcessor Correctable\n");
+	if (available_error_type & 0x0002)
+		seq_printf(m, "0x00000002\tProcessor Uncorrectable non-fatal\n");
+	if (available_error_type & 0x0004)
+		seq_printf(m, "0x00000004\tProcessor Uncorrectable fatal\n");
+	if (available_error_type & 0x0008)
+		seq_printf(m, "0x00000008\tMemory Correctable\n");
+	if (available_error_type & 0x0010)
+		seq_printf(m, "0x00000010\tMemory Uncorrectable non-fatal\n");
+	if (available_error_type & 0x0020)
+		seq_printf(m, "0x00000020\tMemory Uncorrectable fatal\n");
+	if (available_error_type & 0x0040)
+		seq_printf(m, "0x00000040\tPCI Express Correctable\n");
+	if (available_error_type & 0x0080)
+		seq_printf(m, "0x00000080\tPCI Express Uncorrectable non-fatal\n");
+	if (available_error_type & 0x0100)
+		seq_printf(m, "0x00000100\tPCI Express Uncorrectable fatal\n");
+	if (available_error_type & 0x0200)
+		seq_printf(m, "0x00000200\tPlatform Correctable\n");
+	if (available_error_type & 0x0400)
+		seq_printf(m, "0x00000400\tPlatform Uncorrectable non-fatal\n");
+	if (available_error_type & 0x0800)
+		seq_printf(m, "0x00000800\tPlatform Uncorrectable fatal\n");
+
+	return 0;
+}
+
+static int available_error_type_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, available_error_type_show, NULL);
+}
+
+static const struct file_operations available_error_type_fops = {
+	.open		= available_error_type_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int error_type_get(void *data, u64 *val)
+{
+	*val = error_type;
+
+	return 0;
+}
+
+static int error_type_set(void *data, u64 val)
+{
+	int rc;
+	u32 available_error_type = 0;
+
+	/* Only one error type can be specified */
+	if (val & (val - 1))
+		return -EINVAL;
+	rc = einj_get_available_error_type(&available_error_type);
+	if (rc)
+		return rc;
+	if (!(val & available_error_type))
+		return -EINVAL;
+	error_type = val;
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(error_type_fops, error_type_get,
+			error_type_set, "0x%llx\n");
+
+static int error_inject_set(void *data, u64 val)
+{
+	if (!error_type)
+		return -EINVAL;
+
+	return einj_error_inject(error_type, error_param1, error_param2);
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(error_inject_fops, NULL,
+			error_inject_set, "%llu\n");
+
+static int einj_check_table(struct acpi_table_einj *einj_tab)
+{
+	if (einj_tab->header_length != sizeof(struct acpi_table_einj))
+		return -EINVAL;
+	if (einj_tab->header.length < sizeof(struct acpi_table_einj))
+		return -EINVAL;
+	if (einj_tab->entries !=
+	    (einj_tab->header.length - sizeof(struct acpi_table_einj)) /
+	    sizeof(struct acpi_einj_entry))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init einj_init(void)
+{
+	int rc;
+	u64 param_paddr;
+	acpi_status status;
+	struct dentry *fentry;
+	struct apei_exec_context ctx;
+
+	if (acpi_disabled)
+		return -ENODEV;
+
+	status = acpi_get_table(ACPI_SIG_EINJ, 0,
+				(struct acpi_table_header **)&einj_tab);
+	if (status == AE_NOT_FOUND) {
+		pr_info(EINJ_PFX "Table is not found!\n");
+		return -ENODEV;
+	} else if (ACPI_FAILURE(status)) {
+		const char *msg = acpi_format_exception(status);
+		pr_err(EINJ_PFX "Failed to get table, %s\n", msg);
+		return -EINVAL;
+	}
+
+	rc = einj_check_table(einj_tab);
+	if (rc) {
+		pr_warning(FW_BUG EINJ_PFX "EINJ table is invalid\n");
+		return -EINVAL;
+	}
+
+	rc = -ENOMEM;
+	einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir());
+	if (!einj_debug_dir)
+		goto err_cleanup;
+	fentry = debugfs_create_file("available_error_type", S_IRUSR,
+				     einj_debug_dir, NULL,
+				     &available_error_type_fops);
+	if (!fentry)
+		goto err_cleanup;
+	fentry = debugfs_create_file("error_type", S_IRUSR | S_IWUSR,
+				     einj_debug_dir, NULL, &error_type_fops);
+	if (!fentry)
+		goto err_cleanup;
+	fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
+				    einj_debug_dir, &error_param1);
+	if (!fentry)
+		goto err_cleanup;
+	fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
+				    einj_debug_dir, &error_param2);
+	if (!fentry)
+		goto err_cleanup;
+	fentry = debugfs_create_file("error_inject", S_IWUSR,
+				     einj_debug_dir, NULL, &error_inject_fops);
+	if (!fentry)
+		goto err_cleanup;
+
+	apei_resources_init(&einj_resources);
+	einj_exec_ctx_init(&ctx);
+	rc = apei_exec_collect_resources(&ctx, &einj_resources);
+	if (rc)
+		goto err_fini;
+	rc = apei_resources_request(&einj_resources, "APEI EINJ");
+	if (rc)
+		goto err_fini;
+	rc = apei_exec_pre_map_gars(&ctx);
+	if (rc)
+		goto err_release;
+	param_paddr = einj_get_parameter_address();
+	if (param_paddr) {
+		einj_param = ioremap(param_paddr, sizeof(*einj_param));
+		rc = -ENOMEM;
+		if (!einj_param)
+			goto err_unmap;
+	}
+
+	pr_info(EINJ_PFX "Error INJection is initialized.\n");
+
+	return 0;
+
+err_unmap:
+	apei_exec_post_unmap_gars(&ctx);
+err_release:
+	apei_resources_release(&einj_resources);
+err_fini:
+	apei_resources_fini(&einj_resources);
+err_cleanup:
+	debugfs_remove_recursive(einj_debug_dir);
+
+	return rc;
+}
+
+static void __exit einj_exit(void)
+{
+	struct apei_exec_context ctx;
+
+	if (einj_param)
+		iounmap(einj_param);
+	einj_exec_ctx_init(&ctx);
+	apei_exec_post_unmap_gars(&ctx);
+	apei_resources_release(&einj_resources);
+	apei_resources_fini(&einj_resources);
+	debugfs_remove_recursive(einj_debug_dir);
+}
+
+module_init(einj_init);
+module_exit(einj_exit);
+
+MODULE_AUTHOR("Huang Ying");
+MODULE_DESCRIPTION("APEI Error INJection support");
+MODULE_LICENSE("GPL");
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
new file mode 100644
index 00000000000..2ebc3911550
--- /dev/null
+++ b/drivers/acpi/apei/erst.c
@@ -0,0 +1,855 @@
+/*
+ * APEI Error Record Serialization Table support
+ *
+ * ERST is a way provided by APEI to save and retrieve hardware error
+ * infomation to and from a persistent store.
+ *
+ * For more information about ERST, please refer to ACPI Specification
+ * version 4.0, section 17.4.
+ *
+ * Copyright 2010 Intel Corp.
+ *   Author: Huang Ying <ying.huang@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/acpi.h>
+#include <linux/uaccess.h>
+#include <linux/cper.h>
+#include <linux/nmi.h>
+#include <acpi/apei.h>
+
+#include "apei-internal.h"
+
+#define ERST_PFX "ERST: "
+
+/* ERST command status */
+#define ERST_STATUS_SUCCESS			0x0
+#define ERST_STATUS_NOT_ENOUGH_SPACE		0x1
+#define ERST_STATUS_HARDWARE_NOT_AVAILABLE	0x2
+#define ERST_STATUS_FAILED			0x3
+#define ERST_STATUS_RECORD_STORE_EMPTY		0x4
+#define ERST_STATUS_RECORD_NOT_FOUND		0x5
+
+#define ERST_TAB_ENTRY(tab)						\
+	((struct acpi_whea_header *)((char *)(tab) +			\
+				     sizeof(struct acpi_table_erst)))
+
+#define SPIN_UNIT		100			/* 100ns */
+/* Firmware should respond within 1 miliseconds */
+#define FIRMWARE_TIMEOUT	(1 * NSEC_PER_MSEC)
+#define FIRMWARE_MAX_STALL	50			/* 50us */
+
+int erst_disable;
+EXPORT_SYMBOL_GPL(erst_disable);
+
+static struct acpi_table_erst *erst_tab;
+
+/* ERST Error Log Address Range atrributes */
+#define ERST_RANGE_RESERVED	0x0001
+#define ERST_RANGE_NVRAM	0x0002
+#define ERST_RANGE_SLOW		0x0004
+
+/*
+ * ERST Error Log Address Range, used as buffer for reading/writing
+ * error records.
+ */
+static struct erst_erange {
+	u64 base;
+	u64 size;
+	void __iomem *vaddr;
+	u32 attr;
+} erst_erange;
+
+/*
+ * Prevent ERST interpreter to run simultaneously, because the
+ * corresponding firmware implementation may not work properly when
+ * invoked simultaneously.
+ *
+ * It is used to provide exclusive accessing for ERST Error Log
+ * Address Range too.
+ */
+static DEFINE_SPINLOCK(erst_lock);
+
+static inline int erst_errno(int command_status)
+{
+	switch (command_status) {
+	case ERST_STATUS_SUCCESS:
+		return 0;
+	case ERST_STATUS_HARDWARE_NOT_AVAILABLE:
+		return -ENODEV;
+	case ERST_STATUS_NOT_ENOUGH_SPACE:
+		return -ENOSPC;
+	case ERST_STATUS_RECORD_STORE_EMPTY:
+	case ERST_STATUS_RECORD_NOT_FOUND:
+		return -ENOENT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int erst_timedout(u64 *t, u64 spin_unit)
+{
+	if ((s64)*t < spin_unit) {
+		pr_warning(FW_WARN ERST_PFX
+			   "Firmware does not respond in time\n");
+		return 1;
+	}
+	*t -= spin_unit;
+	ndelay(spin_unit);
+	touch_nmi_watchdog();
+	return 0;
+}
+
+static int erst_exec_load_var1(struct apei_exec_context *ctx,
+			       struct acpi_whea_header *entry)
+{
+	return __apei_exec_read_register(entry, &ctx->var1);
+}
+
+static int erst_exec_load_var2(struct apei_exec_context *ctx,
+			       struct acpi_whea_header *entry)
+{
+	return __apei_exec_read_register(entry, &ctx->var2);
+}
+
+static int erst_exec_store_var1(struct apei_exec_context *ctx,
+				struct acpi_whea_header *entry)
+{
+	return __apei_exec_write_register(entry, ctx->var1);
+}
+
+static int erst_exec_add(struct apei_exec_context *ctx,
+			 struct acpi_whea_header *entry)
+{
+	ctx->var1 += ctx->var2;
+	return 0;
+}
+
+static int erst_exec_subtract(struct apei_exec_context *ctx,
+			      struct acpi_whea_header *entry)
+{
+	ctx->var1 -= ctx->var2;
+	return 0;
+}
+
+static int erst_exec_add_value(struct apei_exec_context *ctx,
+			       struct acpi_whea_header *entry)
+{
+	int rc;
+	u64 val;
+
+	rc = __apei_exec_read_register(entry, &val);
+	if (rc)
+		return rc;
+	val += ctx->value;
+	rc = __apei_exec_write_register(entry, val);
+	return rc;
+}
+
+static int erst_exec_subtract_value(struct apei_exec_context *ctx,
+				    struct acpi_whea_header *entry)
+{
+	int rc;
+	u64 val;
+
+	rc = __apei_exec_read_register(entry, &val);
+	if (rc)
+		return rc;
+	val -= ctx->value;
+	rc = __apei_exec_write_register(entry, val);
+	return rc;
+}
+
+static int erst_exec_stall(struct apei_exec_context *ctx,
+			   struct acpi_whea_header *entry)
+{
+	u64 stall_time;
+
+	if (ctx->value > FIRMWARE_MAX_STALL) {
+		if (!in_nmi())
+			pr_warning(FW_WARN ERST_PFX
+			"Too long stall time for stall instruction: %llx.\n",
+				   ctx->value);
+		stall_time = FIRMWARE_MAX_STALL;
+	} else
+		stall_time = ctx->value;
+	udelay(stall_time);
+	return 0;
+}
+
+static int erst_exec_stall_while_true(struct apei_exec_context *ctx,
+				      struct acpi_whea_header *entry)
+{
+	int rc;
+	u64 val;
+	u64 timeout = FIRMWARE_TIMEOUT;
+	u64 stall_time;
+
+	if (ctx->var1 > FIRMWARE_MAX_STALL) {
+		if (!in_nmi())
+			pr_warning(FW_WARN ERST_PFX
+		"Too long stall time for stall while true instruction: %llx.\n",
+				   ctx->var1);
+		stall_time = FIRMWARE_MAX_STALL;
+	} else
+		stall_time = ctx->var1;
+
+	for (;;) {
+		rc = __apei_exec_read_register(entry, &val);
+		if (rc)
+			return rc;
+		if (val != ctx->value)
+			break;
+		if (erst_timedout(&timeout, stall_time * NSEC_PER_USEC))
+			return -EIO;
+	}
+	return 0;
+}
+
+static int erst_exec_skip_next_instruction_if_true(
+	struct apei_exec_context *ctx,
+	struct acpi_whea_header *entry)
+{
+	int rc;
+	u64 val;
+
+	rc = __apei_exec_read_register(entry, &val);
+	if (rc)
+		return rc;
+	if (val == ctx->value) {
+		ctx->ip += 2;
+		return APEI_EXEC_SET_IP;
+	}
+
+	return 0;
+}
+
+static int erst_exec_goto(struct apei_exec_context *ctx,
+			  struct acpi_whea_header *entry)
+{
+	ctx->ip = ctx->value;
+	return APEI_EXEC_SET_IP;
+}
+
+static int erst_exec_set_src_address_base(struct apei_exec_context *ctx,
+					  struct acpi_whea_header *entry)
+{
+	return __apei_exec_read_register(entry, &ctx->src_base);
+}
+
+static int erst_exec_set_dst_address_base(struct apei_exec_context *ctx,
+					  struct acpi_whea_header *entry)
+{
+	return __apei_exec_read_register(entry, &ctx->dst_base);
+}
+
+static int erst_exec_move_data(struct apei_exec_context *ctx,
+			       struct acpi_whea_header *entry)
+{
+	int rc;
+	u64 offset;
+
+	rc = __apei_exec_read_register(entry, &offset);
+	if (rc)
+		return rc;
+	memmove((void *)ctx->dst_base + offset,
+		(void *)ctx->src_base + offset,
+		ctx->var2);
+
+	return 0;
+}
+
+static struct apei_exec_ins_type erst_ins_type[] = {
+	[ACPI_ERST_READ_REGISTER] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = apei_exec_read_register,
+	},
+	[ACPI_ERST_READ_REGISTER_VALUE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = apei_exec_read_register_value,
+	},
+	[ACPI_ERST_WRITE_REGISTER] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = apei_exec_write_register,
+	},
+	[ACPI_ERST_WRITE_REGISTER_VALUE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = apei_exec_write_register_value,
+	},
+	[ACPI_ERST_NOOP] = {
+		.flags = 0,
+		.run = apei_exec_noop,
+	},
+	[ACPI_ERST_LOAD_VAR1] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_load_var1,
+	},
+	[ACPI_ERST_LOAD_VAR2] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_load_var2,
+	},
+	[ACPI_ERST_STORE_VAR1] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_store_var1,
+	},
+	[ACPI_ERST_ADD] = {
+		.flags = 0,
+		.run = erst_exec_add,
+	},
+	[ACPI_ERST_SUBTRACT] = {
+		.flags = 0,
+		.run = erst_exec_subtract,
+	},
+	[ACPI_ERST_ADD_VALUE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_add_value,
+	},
+	[ACPI_ERST_SUBTRACT_VALUE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_subtract_value,
+	},
+	[ACPI_ERST_STALL] = {
+		.flags = 0,
+		.run = erst_exec_stall,
+	},
+	[ACPI_ERST_STALL_WHILE_TRUE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_stall_while_true,
+	},
+	[ACPI_ERST_SKIP_NEXT_IF_TRUE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_skip_next_instruction_if_true,
+	},
+	[ACPI_ERST_GOTO] = {
+		.flags = 0,
+		.run = erst_exec_goto,
+	},
+	[ACPI_ERST_SET_SRC_ADDRESS_BASE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_set_src_address_base,
+	},
+	[ACPI_ERST_SET_DST_ADDRESS_BASE] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_set_dst_address_base,
+	},
+	[ACPI_ERST_MOVE_DATA] = {
+		.flags = APEI_EXEC_INS_ACCESS_REGISTER,
+		.run = erst_exec_move_data,
+	},
+};
+
+static inline void erst_exec_ctx_init(struct apei_exec_context *ctx)
+{
+	apei_exec_ctx_init(ctx, erst_ins_type, ARRAY_SIZE(erst_ins_type),
+			   ERST_TAB_ENTRY(erst_tab), erst_tab->entries);
+}
+
+static int erst_get_erange(struct erst_erange *range)
+{
+	struct apei_exec_context ctx;
+	int rc;
+
+	erst_exec_ctx_init(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_RANGE);
+	if (rc)
+		return rc;
+	range->base = apei_exec_ctx_get_output(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_LENGTH);
+	if (rc)
+		return rc;
+	range->size = apei_exec_ctx_get_output(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_GET_ERROR_ATTRIBUTES);
+	if (rc)
+		return rc;
+	range->attr = apei_exec_ctx_get_output(&ctx);
+
+	return 0;
+}
+
+static ssize_t __erst_get_record_count(void)
+{
+	struct apei_exec_context ctx;
+	int rc;
+
+	erst_exec_ctx_init(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_GET_RECORD_COUNT);
+	if (rc)
+		return rc;
+	return apei_exec_ctx_get_output(&ctx);
+}
+
+ssize_t erst_get_record_count(void)
+{
+	ssize_t count;
+	unsigned long flags;
+
+	if (erst_disable)
+		return -ENODEV;
+
+	spin_lock_irqsave(&erst_lock, flags);
+	count = __erst_get_record_count();
+	spin_unlock_irqrestore(&erst_lock, flags);
+
+	return count;
+}
+EXPORT_SYMBOL_GPL(erst_get_record_count);
+
+static int __erst_get_next_record_id(u64 *record_id)
+{
+	struct apei_exec_context ctx;
+	int rc;
+
+	erst_exec_ctx_init(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_GET_RECORD_ID);
+	if (rc)
+		return rc;
+	*record_id = apei_exec_ctx_get_output(&ctx);
+
+	return 0;
+}
+
+/*
+ * Get the record ID of an existing error record on the persistent
+ * storage. If there is no error record on the persistent storage, the
+ * returned record_id is APEI_ERST_INVALID_RECORD_ID.
+ */
+int erst_get_next_record_id(u64 *record_id)
+{
+	int rc;
+	unsigned long flags;
+
+	if (erst_disable)
+		return -ENODEV;
+
+	spin_lock_irqsave(&erst_lock, flags);
+	rc = __erst_get_next_record_id(record_id);
+	spin_unlock_irqrestore(&erst_lock, flags);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(erst_get_next_record_id);
+
+static int __erst_write_to_storage(u64 offset)
+{
+	struct apei_exec_context ctx;
+	u64 timeout = FIRMWARE_TIMEOUT;
+	u64 val;
+	int rc;
+
+	erst_exec_ctx_init(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_WRITE);
+	if (rc)
+		return rc;
+	apei_exec_ctx_set_input(&ctx, offset);
+	rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_OFFSET);
+	if (rc)
+		return rc;
+	rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION);
+	if (rc)
+		return rc;
+	for (;;) {
+		rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS);
+		if (rc)
+			return rc;
+		val = apei_exec_ctx_get_output(&ctx);
+		if (!val)
+			break;
+		if (erst_timedout(&timeout, SPIN_UNIT))
+			return -EIO;
+	}
+	rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS);
+	if (rc)
+		return rc;
+	val = apei_exec_ctx_get_output(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_END);
+	if (rc)
+		return rc;
+
+	return erst_errno(val);
+}
+
+static int __erst_read_from_storage(u64 record_id, u64 offset)
+{
+	struct apei_exec_context ctx;
+	u64 timeout = FIRMWARE_TIMEOUT;
+	u64 val;
+	int rc;
+
+	erst_exec_ctx_init(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_READ);
+	if (rc)
+		return rc;
+	apei_exec_ctx_set_input(&ctx, offset);
+	rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_OFFSET);
+	if (rc)
+		return rc;
+	apei_exec_ctx_set_input(&ctx, record_id);
+	rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_ID);
+	if (rc)
+		return rc;
+	rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION);
+	if (rc)
+		return rc;
+	for (;;) {
+		rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS);
+		if (rc)
+			return rc;
+		val = apei_exec_ctx_get_output(&ctx);
+		if (!val)
+			break;
+		if (erst_timedout(&timeout, SPIN_UNIT))
+			return -EIO;
+	};
+	rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS);
+	if (rc)
+		return rc;
+	val = apei_exec_ctx_get_output(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_END);
+	if (rc)
+		return rc;
+
+	return erst_errno(val);
+}
+
+static int __erst_clear_from_storage(u64 record_id)
+{
+	struct apei_exec_context ctx;
+	u64 timeout = FIRMWARE_TIMEOUT;
+	u64 val;
+	int rc;
+
+	erst_exec_ctx_init(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_BEGIN_CLEAR);
+	if (rc)
+		return rc;
+	apei_exec_ctx_set_input(&ctx, record_id);
+	rc = apei_exec_run(&ctx, ACPI_ERST_SET_RECORD_ID);
+	if (rc)
+		return rc;
+	rc = apei_exec_run(&ctx, ACPI_ERST_EXECUTE_OPERATION);
+	if (rc)
+		return rc;
+	for (;;) {
+		rc = apei_exec_run(&ctx, ACPI_ERST_CHECK_BUSY_STATUS);
+		if (rc)
+			return rc;
+		val = apei_exec_ctx_get_output(&ctx);
+		if (!val)
+			break;
+		if (erst_timedout(&timeout, SPIN_UNIT))
+			return -EIO;
+	}
+	rc = apei_exec_run(&ctx, ACPI_ERST_GET_COMMAND_STATUS);
+	if (rc)
+		return rc;
+	val = apei_exec_ctx_get_output(&ctx);
+	rc = apei_exec_run(&ctx, ACPI_ERST_END);
+	if (rc)
+		return rc;
+
+	return erst_errno(val);
+}
+
+/* NVRAM ERST Error Log Address Range is not supported yet */
+static void pr_unimpl_nvram(void)
+{
+	if (printk_ratelimit())
+		pr_warning(ERST_PFX
+		"NVRAM ERST Log Address Range is not implemented yet\n");
+}
+
+static int __erst_write_to_nvram(const struct cper_record_header *record)
+{
+	/* do not print message, because printk is not safe for NMI */
+	return -ENOSYS;
+}
+
+static int __erst_read_to_erange_from_nvram(u64 record_id, u64 *offset)
+{
+	pr_unimpl_nvram();
+	return -ENOSYS;
+}
+
+static int __erst_clear_from_nvram(u64 record_id)
+{
+	pr_unimpl_nvram();
+	return -ENOSYS;
+}
+
+int erst_write(const struct cper_record_header *record)
+{
+	int rc;
+	unsigned long flags;
+	struct cper_record_header *rcd_erange;
+
+	if (erst_disable)
+		return -ENODEV;
+
+	if (memcmp(record->signature, CPER_SIG_RECORD, CPER_SIG_SIZE))
+		return -EINVAL;
+
+	if (erst_erange.attr & ERST_RANGE_NVRAM) {
+		if (!spin_trylock_irqsave(&erst_lock, flags))
+			return -EBUSY;
+		rc = __erst_write_to_nvram(record);
+		spin_unlock_irqrestore(&erst_lock, flags);
+		return rc;
+	}
+
+	if (record->record_length > erst_erange.size)
+		return -EINVAL;
+
+	if (!spin_trylock_irqsave(&erst_lock, flags))
+		return -EBUSY;
+	memcpy(erst_erange.vaddr, record, record->record_length);
+	rcd_erange = erst_erange.vaddr;
+	/* signature for serialization system */
+	memcpy(&rcd_erange->persistence_information, "ER", 2);
+
+	rc = __erst_write_to_storage(0);
+	spin_unlock_irqrestore(&erst_lock, flags);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(erst_write);
+
+static int __erst_read_to_erange(u64 record_id, u64 *offset)
+{
+	int rc;
+
+	if (erst_erange.attr & ERST_RANGE_NVRAM)
+		return __erst_read_to_erange_from_nvram(
+			record_id, offset);
+
+	rc = __erst_read_from_storage(record_id, 0);
+	if (rc)
+		return rc;
+	*offset = 0;
+
+	return 0;
+}
+
+static ssize_t __erst_read(u64 record_id, struct cper_record_header *record,
+			   size_t buflen)
+{
+	int rc;
+	u64 offset, len = 0;
+	struct cper_record_header *rcd_tmp;
+
+	rc = __erst_read_to_erange(record_id, &offset);
+	if (rc)
+		return rc;
+	rcd_tmp = erst_erange.vaddr + offset;
+	len = rcd_tmp->record_length;
+	if (len <= buflen)
+		memcpy(record, rcd_tmp, len);
+
+	return len;
+}
+
+/*
+ * If return value > buflen, the buffer size is not big enough,
+ * else if return value < 0, something goes wrong,
+ * else everything is OK, and return value is record length
+ */
+ssize_t erst_read(u64 record_id, struct cper_record_header *record,
+		  size_t buflen)
+{
+	ssize_t len;
+	unsigned long flags;
+
+	if (erst_disable)
+		return -ENODEV;
+
+	spin_lock_irqsave(&erst_lock, flags);
+	len = __erst_read(record_id, record, buflen);
+	spin_unlock_irqrestore(&erst_lock, flags);
+	return len;
+}
+EXPORT_SYMBOL_GPL(erst_read);
+
+/*
+ * If return value > buflen, the buffer size is not big enough,
+ * else if return value = 0, there is no more record to read,
+ * else if return value < 0, something goes wrong,
+ * else everything is OK, and return value is record length
+ */
+ssize_t erst_read_next(struct cper_record_header *record, size_t buflen)
+{
+	int rc;
+	ssize_t len;
+	unsigned long flags;
+	u64 record_id;
+
+	if (erst_disable)
+		return -ENODEV;
+
+	spin_lock_irqsave(&erst_lock, flags);
+	rc = __erst_get_next_record_id(&record_id);
+	if (rc) {
+		spin_unlock_irqrestore(&erst_lock, flags);
+		return rc;
+	}
+	/* no more record */
+	if (record_id == APEI_ERST_INVALID_RECORD_ID) {
+		spin_unlock_irqrestore(&erst_lock, flags);
+		return 0;
+	}
+
+	len = __erst_read(record_id, record, buflen);
+	spin_unlock_irqrestore(&erst_lock, flags);
+
+	return len;
+}
+EXPORT_SYMBOL_GPL(erst_read_next);
+
+int erst_clear(u64 record_id)
+{
+	int rc;
+	unsigned long flags;
+
+	if (erst_disable)
+		return -ENODEV;
+
+	spin_lock_irqsave(&erst_lock, flags);
+	if (erst_erange.attr & ERST_RANGE_NVRAM)
+		rc = __erst_clear_from_nvram(record_id);
+	else
+		rc = __erst_clear_from_storage(record_id);
+	spin_unlock_irqrestore(&erst_lock, flags);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(erst_clear);
+
+static int __init setup_erst_disable(char *str)
+{
+	erst_disable = 1;
+	return 0;
+}
+
+__setup("erst_disable", setup_erst_disable);
+
+static int erst_check_table(struct acpi_table_erst *erst_tab)
+{
+	if (erst_tab->header_length != sizeof(struct acpi_table_erst))
+		return -EINVAL;
+	if (erst_tab->header.length < sizeof(struct acpi_table_erst))
+		return -EINVAL;
+	if (erst_tab->entries !=
+	    (erst_tab->header.length - sizeof(struct acpi_table_erst)) /
+	    sizeof(struct acpi_erst_entry))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int __init erst_init(void)
+{
+	int rc = 0;
+	acpi_status status;
+	struct apei_exec_context ctx;
+	struct apei_resources erst_resources;
+	struct resource *r;
+
+	if (acpi_disabled)
+		goto err;
+
+	if (erst_disable) {
+		pr_info(ERST_PFX
+	"Error Record Serialization Table (ERST) support is disabled.\n");
+		goto err;
+	}
+
+	status = acpi_get_table(ACPI_SIG_ERST, 0,
+				(struct acpi_table_header **)&erst_tab);
+	if (status == AE_NOT_FOUND) {
+		pr_err(ERST_PFX "Table is not found!\n");
+		goto err;
+	} else if (ACPI_FAILURE(status)) {
+		const char *msg = acpi_format_exception(status);
+		pr_err(ERST_PFX "Failed to get table, %s\n", msg);
+		rc = -EINVAL;
+		goto err;
+	}
+
+	rc = erst_check_table(erst_tab);
+	if (rc) {
+		pr_err(FW_BUG ERST_PFX "ERST table is invalid\n");
+		goto err;
+	}
+
+	apei_resources_init(&erst_resources);
+	erst_exec_ctx_init(&ctx);
+	rc = apei_exec_collect_resources(&ctx, &erst_resources);
+	if (rc)
+		goto err_fini;
+	rc = apei_resources_request(&erst_resources, "APEI ERST");
+	if (rc)
+		goto err_fini;
+	rc = apei_exec_pre_map_gars(&ctx);
+	if (rc)
+		goto err_release;
+	rc = erst_get_erange(&erst_erange);
+	if (rc) {
+		if (rc == -ENODEV)
+			pr_info(ERST_PFX
+	"The corresponding hardware device or firmware implementation "
+	"is not available.\n");
+		else
+			pr_err(ERST_PFX
+			       "Failed to get Error Log Address Range.\n");
+		goto err_unmap_reg;
+	}
+
+	r = request_mem_region(erst_erange.base, erst_erange.size, "APEI ERST");
+	if (!r) {
+		pr_err(ERST_PFX
+		"Can not request iomem region <0x%16llx-0x%16llx> for ERST.\n",
+		(unsigned long long)erst_erange.base,
+		(unsigned long long)erst_erange.base + erst_erange.size);
+		rc = -EIO;
+		goto err_unmap_reg;
+	}
+	rc = -ENOMEM;
+	erst_erange.vaddr = ioremap_cache(erst_erange.base,
+					  erst_erange.size);
+	if (!erst_erange.vaddr)
+		goto err_release_erange;
+
+	pr_info(ERST_PFX
+	"Error Record Serialization Table (ERST) support is initialized.\n");
+
+	return 0;
+
+err_release_erange:
+	release_mem_region(erst_erange.base, erst_erange.size);
+err_unmap_reg:
+	apei_exec_post_unmap_gars(&ctx);
+err_release:
+	apei_resources_release(&erst_resources);
+err_fini:
+	apei_resources_fini(&erst_resources);
+err:
+	erst_disable = 1;
+	return rc;
+}
+
+device_initcall(erst_init);
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
new file mode 100644
index 00000000000..fd0cc016a09
--- /dev/null
+++ b/drivers/acpi/apei/ghes.c
@@ -0,0 +1,427 @@
+/*
+ * APEI Generic Hardware Error Source support
+ *
+ * Generic Hardware Error Source provides a way to report platform
+ * hardware errors (such as that from chipset). It works in so called
+ * "Firmware First" mode, that is, hardware errors are reported to
+ * firmware firstly, then reported to Linux by firmware. This way,
+ * some non-standard hardware error registers or non-standard hardware
+ * link can be checked by firmware to produce more hardware error
+ * information for Linux.
+ *
+ * For more information about Generic Hardware Error Source, please
+ * refer to ACPI Specification version 4.0, section 17.3.2.6
+ *
+ * Now, only SCI notification type and memory errors are
+ * supported. More notification type and hardware error type will be
+ * added later.
+ *
+ * Copyright 2010 Intel Corp.
+ *   Author: Huang Ying <ying.huang@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/cper.h>
+#include <linux/kdebug.h>
+#include <acpi/apei.h>
+#include <acpi/atomicio.h>
+#include <acpi/hed.h>
+#include <asm/mce.h>
+
+#include "apei-internal.h"
+
+#define GHES_PFX	"GHES: "
+
+#define GHES_ESTATUS_MAX_SIZE		65536
+
+/*
+ * One struct ghes is created for each generic hardware error
+ * source.
+ *
+ * It provides the context for APEI hardware error timer/IRQ/SCI/NMI
+ * handler. Handler for one generic hardware error source is only
+ * triggered after the previous one is done. So handler can uses
+ * struct ghes without locking.
+ *
+ * estatus: memory buffer for error status block, allocated during
+ * HEST parsing.
+ */
+#define GHES_TO_CLEAR		0x0001
+
+struct ghes {
+	struct acpi_hest_generic *generic;
+	struct acpi_hest_generic_status *estatus;
+	struct list_head list;
+	u64 buffer_paddr;
+	unsigned long flags;
+};
+
+/*
+ * Error source lists, one list for each notification method. The
+ * members in lists are struct ghes.
+ *
+ * The list members are only added in HEST parsing and deleted during
+ * module_exit, that is, single-threaded. So no lock is needed for
+ * that.
+ *
+ * But the mutual exclusion is needed between members adding/deleting
+ * and timer/IRQ/SCI/NMI handler, which may traverse the list. RCU is
+ * used for that.
+ */
+static LIST_HEAD(ghes_sci);
+
+static struct ghes *ghes_new(struct acpi_hest_generic *generic)
+{
+	struct ghes *ghes;
+	unsigned int error_block_length;
+	int rc;
+
+	ghes = kzalloc(sizeof(*ghes), GFP_KERNEL);
+	if (!ghes)
+		return ERR_PTR(-ENOMEM);
+	ghes->generic = generic;
+	INIT_LIST_HEAD(&ghes->list);
+	rc = acpi_pre_map_gar(&generic->error_status_address);
+	if (rc)
+		goto err_free;
+	error_block_length = generic->error_block_length;
+	if (error_block_length > GHES_ESTATUS_MAX_SIZE) {
+		pr_warning(FW_WARN GHES_PFX
+			   "Error status block length is too long: %u for "
+			   "generic hardware error source: %d.\n",
+			   error_block_length, generic->header.source_id);
+		error_block_length = GHES_ESTATUS_MAX_SIZE;
+	}
+	ghes->estatus = kmalloc(error_block_length, GFP_KERNEL);
+	if (!ghes->estatus) {
+		rc = -ENOMEM;
+		goto err_unmap;
+	}
+
+	return ghes;
+
+err_unmap:
+	acpi_post_unmap_gar(&generic->error_status_address);
+err_free:
+	kfree(ghes);
+	return ERR_PTR(rc);
+}
+
+static void ghes_fini(struct ghes *ghes)
+{
+	kfree(ghes->estatus);
+	acpi_post_unmap_gar(&ghes->generic->error_status_address);
+}
+
+enum {
+	GHES_SER_NO = 0x0,
+	GHES_SER_CORRECTED = 0x1,
+	GHES_SER_RECOVERABLE = 0x2,
+	GHES_SER_PANIC = 0x3,
+};
+
+static inline int ghes_severity(int severity)
+{
+	switch (severity) {
+	case CPER_SER_INFORMATIONAL:
+		return GHES_SER_NO;
+	case CPER_SER_CORRECTED:
+		return GHES_SER_CORRECTED;
+	case CPER_SER_RECOVERABLE:
+		return GHES_SER_RECOVERABLE;
+	case CPER_SER_FATAL:
+		return GHES_SER_PANIC;
+	default:
+		/* Unkown, go panic */
+		return GHES_SER_PANIC;
+	}
+}
+
+/* SCI handler run in work queue, so ioremap can be used here */
+static int ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
+				 int from_phys)
+{
+	void *vaddr;
+
+	vaddr = ioremap_cache(paddr, len);
+	if (!vaddr)
+		return -ENOMEM;
+	if (from_phys)
+		memcpy(buffer, vaddr, len);
+	else
+		memcpy(vaddr, buffer, len);
+	iounmap(vaddr);
+
+	return 0;
+}
+
+static int ghes_read_estatus(struct ghes *ghes, int silent)
+{
+	struct acpi_hest_generic *g = ghes->generic;
+	u64 buf_paddr;
+	u32 len;
+	int rc;
+
+	rc = acpi_atomic_read(&buf_paddr, &g->error_status_address);
+	if (rc) {
+		if (!silent && printk_ratelimit())
+			pr_warning(FW_WARN GHES_PFX
+"Failed to read error status block address for hardware error source: %d.\n",
+				   g->header.source_id);
+		return -EIO;
+	}
+	if (!buf_paddr)
+		return -ENOENT;
+
+	rc = ghes_copy_tofrom_phys(ghes->estatus, buf_paddr,
+				   sizeof(*ghes->estatus), 1);
+	if (rc)
+		return rc;
+	if (!ghes->estatus->block_status)
+		return -ENOENT;
+
+	ghes->buffer_paddr = buf_paddr;
+	ghes->flags |= GHES_TO_CLEAR;
+
+	rc = -EIO;
+	len = apei_estatus_len(ghes->estatus);
+	if (len < sizeof(*ghes->estatus))
+		goto err_read_block;
+	if (len > ghes->generic->error_block_length)
+		goto err_read_block;
+	if (apei_estatus_check_header(ghes->estatus))
+		goto err_read_block;
+	rc = ghes_copy_tofrom_phys(ghes->estatus + 1,
+				   buf_paddr + sizeof(*ghes->estatus),
+				   len - sizeof(*ghes->estatus), 1);
+	if (rc)
+		return rc;
+	if (apei_estatus_check(ghes->estatus))
+		goto err_read_block;
+	rc = 0;
+
+err_read_block:
+	if (rc && !silent)
+		pr_warning(FW_WARN GHES_PFX
+			   "Failed to read error status block!\n");
+	return rc;
+}
+
+static void ghes_clear_estatus(struct ghes *ghes)
+{
+	ghes->estatus->block_status = 0;
+	if (!(ghes->flags & GHES_TO_CLEAR))
+		return;
+	ghes_copy_tofrom_phys(ghes->estatus, ghes->buffer_paddr,
+			      sizeof(ghes->estatus->block_status), 0);
+	ghes->flags &= ~GHES_TO_CLEAR;
+}
+
+static void ghes_do_proc(struct ghes *ghes)
+{
+	int ser, processed = 0;
+	struct acpi_hest_generic_data *gdata;
+
+	ser = ghes_severity(ghes->estatus->error_severity);
+	apei_estatus_for_each_section(ghes->estatus, gdata) {
+#ifdef CONFIG_X86_MCE
+		if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
+				 CPER_SEC_PLATFORM_MEM)) {
+			apei_mce_report_mem_error(
+				ser == GHES_SER_CORRECTED,
+				(struct cper_sec_mem_err *)(gdata+1));
+			processed = 1;
+		}
+#endif
+	}
+
+	if (!processed && printk_ratelimit())
+		pr_warning(GHES_PFX
+		"Unknown error record from generic hardware error source: %d\n",
+			   ghes->generic->header.source_id);
+}
+
+static int ghes_proc(struct ghes *ghes)
+{
+	int rc;
+
+	rc = ghes_read_estatus(ghes, 0);
+	if (rc)
+		goto out;
+	ghes_do_proc(ghes);
+
+out:
+	ghes_clear_estatus(ghes);
+	return 0;
+}
+
+static int ghes_notify_sci(struct notifier_block *this,
+				  unsigned long event, void *data)
+{
+	struct ghes *ghes;
+	int ret = NOTIFY_DONE;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(ghes, &ghes_sci, list) {
+		if (!ghes_proc(ghes))
+			ret = NOTIFY_OK;
+	}
+	rcu_read_unlock();
+
+	return ret;
+}
+
+static struct notifier_block ghes_notifier_sci = {
+	.notifier_call = ghes_notify_sci,
+};
+
+static int hest_ghes_parse(struct acpi_hest_header *hest_hdr, void *data)
+{
+	struct acpi_hest_generic *generic;
+	struct ghes *ghes = NULL;
+	int rc = 0;
+
+	if (hest_hdr->type != ACPI_HEST_TYPE_GENERIC_ERROR)
+		return 0;
+
+	generic = (struct acpi_hest_generic *)hest_hdr;
+	if (!generic->enabled)
+		return 0;
+
+	if (generic->error_block_length <
+	    sizeof(struct acpi_hest_generic_status)) {
+		pr_warning(FW_BUG GHES_PFX
+"Invalid error block length: %u for generic hardware error source: %d\n",
+			   generic->error_block_length,
+			   generic->header.source_id);
+		goto err;
+	}
+	if (generic->records_to_preallocate == 0) {
+		pr_warning(FW_BUG GHES_PFX
+"Invalid records to preallocate: %u for generic hardware error source: %d\n",
+			   generic->records_to_preallocate,
+			   generic->header.source_id);
+		goto err;
+	}
+	ghes = ghes_new(generic);
+	if (IS_ERR(ghes)) {
+		rc = PTR_ERR(ghes);
+		ghes = NULL;
+		goto err;
+	}
+	switch (generic->notify.type) {
+	case ACPI_HEST_NOTIFY_POLLED:
+		pr_warning(GHES_PFX
+"Generic hardware error source: %d notified via POLL is not supported!\n",
+			   generic->header.source_id);
+		break;
+	case ACPI_HEST_NOTIFY_EXTERNAL:
+	case ACPI_HEST_NOTIFY_LOCAL:
+		pr_warning(GHES_PFX
+"Generic hardware error source: %d notified via IRQ is not supported!\n",
+			   generic->header.source_id);
+		break;
+	case ACPI_HEST_NOTIFY_SCI:
+		if (list_empty(&ghes_sci))
+			register_acpi_hed_notifier(&ghes_notifier_sci);
+		list_add_rcu(&ghes->list, &ghes_sci);
+		break;
+	case ACPI_HEST_NOTIFY_NMI:
+		pr_warning(GHES_PFX
+"Generic hardware error source: %d notified via NMI is not supported!\n",
+			   generic->header.source_id);
+		break;
+	default:
+		pr_warning(FW_WARN GHES_PFX
+	"Unknown notification type: %u for generic hardware error source: %d\n",
+			   generic->notify.type, generic->header.source_id);
+		break;
+	}
+
+	return 0;
+err:
+	if (ghes)
+		ghes_fini(ghes);
+	return rc;
+}
+
+static void ghes_cleanup(void)
+{
+	struct ghes *ghes, *nghes;
+
+	if (!list_empty(&ghes_sci))
+		unregister_acpi_hed_notifier(&ghes_notifier_sci);
+
+	synchronize_rcu();
+
+	list_for_each_entry_safe(ghes, nghes, &ghes_sci, list) {
+		list_del(&ghes->list);
+		ghes_fini(ghes);
+		kfree(ghes);
+	}
+}
+
+static int __init ghes_init(void)
+{
+	int rc;
+
+	if (acpi_disabled)
+		return -ENODEV;
+
+	if (hest_disable) {
+		pr_info(GHES_PFX "HEST is not enabled!\n");
+		return -EINVAL;
+	}
+
+	rc = apei_hest_parse(hest_ghes_parse, NULL);
+	if (rc) {
+		pr_err(GHES_PFX
+		"Error during parsing HEST generic hardware error sources.\n");
+		goto err_cleanup;
+	}
+
+	if (list_empty(&ghes_sci)) {
+		pr_info(GHES_PFX
+			"No functional generic hardware error sources.\n");
+		rc = -ENODEV;
+		goto err_cleanup;
+	}
+
+	pr_info(GHES_PFX
+		"Generic Hardware Error Source support is initialized.\n");
+
+	return 0;
+err_cleanup:
+	ghes_cleanup();
+	return rc;
+}
+
+static void __exit ghes_exit(void)
+{
+	ghes_cleanup();
+}
+
+module_init(ghes_init);
+module_exit(ghes_exit);
+
+MODULE_AUTHOR("Huang Ying");
+MODULE_DESCRIPTION("APEI Generic Hardware Error Source support");
+MODULE_LICENSE("GPL");
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
new file mode 100644
index 00000000000..e7f40d362cb
--- /dev/null
+++ b/drivers/acpi/apei/hest.c
@@ -0,0 +1,173 @@
+/*
+ * APEI Hardware Error Souce Table support
+ *
+ * HEST describes error sources in detail; communicates operational
+ * parameters (i.e. severity levels, masking bits, and threshold
+ * values) to Linux as necessary. It also allows the BIOS to report
+ * non-standard error sources to Linux (for example, chipset-specific
+ * error registers).
+ *
+ * For more information about HEST, please refer to ACPI Specification
+ * version 4.0, section 17.3.2.
+ *
+ * Copyright 2009 Intel Corp.
+ *   Author: Huang Ying <ying.huang@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/kdebug.h>
+#include <linux/highmem.h>
+#include <linux/io.h>
+#include <acpi/apei.h>
+
+#include "apei-internal.h"
+
+#define HEST_PFX "HEST: "
+
+int hest_disable;
+EXPORT_SYMBOL_GPL(hest_disable);
+
+/* HEST table parsing */
+
+static struct acpi_table_hest *hest_tab;
+
+static int hest_void_parse(struct acpi_hest_header *hest_hdr, void *data)
+{
+	return 0;
+}
+
+static int hest_esrc_len_tab[ACPI_HEST_TYPE_RESERVED] = {
+	[ACPI_HEST_TYPE_IA32_CHECK] = -1,	/* need further calculation */
+	[ACPI_HEST_TYPE_IA32_CORRECTED_CHECK] = -1,
+	[ACPI_HEST_TYPE_IA32_NMI] = sizeof(struct acpi_hest_ia_nmi),
+	[ACPI_HEST_TYPE_AER_ROOT_PORT] = sizeof(struct acpi_hest_aer_root),
+	[ACPI_HEST_TYPE_AER_ENDPOINT] = sizeof(struct acpi_hest_aer),
+	[ACPI_HEST_TYPE_AER_BRIDGE] = sizeof(struct acpi_hest_aer_bridge),
+	[ACPI_HEST_TYPE_GENERIC_ERROR] = sizeof(struct acpi_hest_generic),
+};
+
+static int hest_esrc_len(struct acpi_hest_header *hest_hdr)
+{
+	u16 hest_type = hest_hdr->type;
+	int len;
+
+	if (hest_type >= ACPI_HEST_TYPE_RESERVED)
+		return 0;
+
+	len = hest_esrc_len_tab[hest_type];
+
+	if (hest_type == ACPI_HEST_TYPE_IA32_CORRECTED_CHECK) {
+		struct acpi_hest_ia_corrected *cmc;
+		cmc = (struct acpi_hest_ia_corrected *)hest_hdr;
+		len = sizeof(*cmc) + cmc->num_hardware_banks *
+			sizeof(struct acpi_hest_ia_error_bank);
+	} else if (hest_type == ACPI_HEST_TYPE_IA32_CHECK) {
+		struct acpi_hest_ia_machine_check *mc;
+		mc = (struct acpi_hest_ia_machine_check *)hest_hdr;
+		len = sizeof(*mc) + mc->num_hardware_banks *
+			sizeof(struct acpi_hest_ia_error_bank);
+	}
+	BUG_ON(len == -1);
+
+	return len;
+};
+
+int apei_hest_parse(apei_hest_func_t func, void *data)
+{
+	struct acpi_hest_header *hest_hdr;
+	int i, rc, len;
+
+	if (hest_disable)
+		return -EINVAL;
+
+	hest_hdr = (struct acpi_hest_header *)(hest_tab + 1);
+	for (i = 0; i < hest_tab->error_source_count; i++) {
+		len = hest_esrc_len(hest_hdr);
+		if (!len) {
+			pr_warning(FW_WARN HEST_PFX
+				   "Unknown or unused hardware error source "
+				   "type: %d for hardware error source: %d.\n",
+				   hest_hdr->type, hest_hdr->source_id);
+			return -EINVAL;
+		}
+		if ((void *)hest_hdr + len >
+		    (void *)hest_tab + hest_tab->header.length) {
+			pr_warning(FW_BUG HEST_PFX
+		"Table contents overflow for hardware error source: %d.\n",
+				hest_hdr->source_id);
+			return -EINVAL;
+		}
+
+		rc = func(hest_hdr, data);
+		if (rc)
+			return rc;
+
+		hest_hdr = (void *)hest_hdr + len;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(apei_hest_parse);
+
+static int __init setup_hest_disable(char *str)
+{
+	hest_disable = 1;
+	return 0;
+}
+
+__setup("hest_disable", setup_hest_disable);
+
+static int __init hest_init(void)
+{
+	acpi_status status;
+	int rc = -ENODEV;
+
+	if (acpi_disabled)
+		goto err;
+
+	if (hest_disable) {
+		pr_info(HEST_PFX "HEST tabling parsing is disabled.\n");
+		goto err;
+	}
+
+	status = acpi_get_table(ACPI_SIG_HEST, 0,
+				(struct acpi_table_header **)&hest_tab);
+	if (status == AE_NOT_FOUND) {
+		pr_info(HEST_PFX "Table is not found!\n");
+		goto err;
+	} else if (ACPI_FAILURE(status)) {
+		const char *msg = acpi_format_exception(status);
+		pr_err(HEST_PFX "Failed to get table, %s\n", msg);
+		rc = -EINVAL;
+		goto err;
+	}
+
+	rc = apei_hest_parse(hest_void_parse, NULL);
+	if (rc)
+		goto err;
+
+	pr_info(HEST_PFX "HEST table parsing is initialized.\n");
+
+	return 0;
+err:
+	hest_disable = 1;
+	return rc;
+}
+
+subsys_initcall(hest_init);
diff --git a/drivers/acpi/atomicio.c b/drivers/acpi/atomicio.c
new file mode 100644
index 00000000000..814b1924961
--- /dev/null
+++ b/drivers/acpi/atomicio.c
@@ -0,0 +1,360 @@
+/*
+ * atomicio.c - ACPI IO memory pre-mapping/post-unmapping, then
+ * accessing in atomic context.
+ *
+ * This is used for NMI handler to access IO memory area, because
+ * ioremap/iounmap can not be used in NMI handler. The IO memory area
+ * is pre-mapped in process context and accessed in NMI handler.
+ *
+ * Copyright (C) 2009-2010, Intel Corp.
+ *	Author: Huang Ying <ying.huang@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
+#include <linux/kref.h>
+#include <linux/rculist.h>
+#include <linux/interrupt.h>
+#include <acpi/atomicio.h>
+
+#define ACPI_PFX "ACPI: "
+
+static LIST_HEAD(acpi_iomaps);
+/*
+ * Used for mutual exclusion between writers of acpi_iomaps list, for
+ * synchronization between readers and writer, RCU is used.
+ */
+static DEFINE_SPINLOCK(acpi_iomaps_lock);
+
+struct acpi_iomap {
+	struct list_head list;
+	void __iomem *vaddr;
+	unsigned long size;
+	phys_addr_t paddr;
+	struct kref ref;
+};
+
+/* acpi_iomaps_lock or RCU read lock must be held before calling */
+static struct acpi_iomap *__acpi_find_iomap(phys_addr_t paddr,
+					    unsigned long size)
+{
+	struct acpi_iomap *map;
+
+	list_for_each_entry_rcu(map, &acpi_iomaps, list) {
+		if (map->paddr + map->size >= paddr + size &&
+		    map->paddr <= paddr)
+			return map;
+	}
+	return NULL;
+}
+
+/*
+ * Atomic "ioremap" used by NMI handler, if the specified IO memory
+ * area is not pre-mapped, NULL will be returned.
+ *
+ * acpi_iomaps_lock or RCU read lock must be held before calling
+ */
+static void __iomem *__acpi_ioremap_fast(phys_addr_t paddr,
+					 unsigned long size)
+{
+	struct acpi_iomap *map;
+
+	map = __acpi_find_iomap(paddr, size);
+	if (map)
+		return map->vaddr + (paddr - map->paddr);
+	else
+		return NULL;
+}
+
+/* acpi_iomaps_lock must be held before calling */
+static void __iomem *__acpi_try_ioremap(phys_addr_t paddr,
+					unsigned long size)
+{
+	struct acpi_iomap *map;
+
+	map = __acpi_find_iomap(paddr, size);
+	if (map) {
+		kref_get(&map->ref);
+		return map->vaddr + (paddr - map->paddr);
+	} else
+		return NULL;
+}
+
+/*
+ * Used to pre-map the specified IO memory area. First try to find
+ * whether the area is already pre-mapped, if it is, increase the
+ * reference count (in __acpi_try_ioremap) and return; otherwise, do
+ * the real ioremap, and add the mapping into acpi_iomaps list.
+ */
+static void __iomem *acpi_pre_map(phys_addr_t paddr,
+				  unsigned long size)
+{
+	void __iomem *vaddr;
+	struct acpi_iomap *map;
+	unsigned long pg_sz, flags;
+	phys_addr_t pg_off;
+
+	spin_lock_irqsave(&acpi_iomaps_lock, flags);
+	vaddr = __acpi_try_ioremap(paddr, size);
+	spin_unlock_irqrestore(&acpi_iomaps_lock, flags);
+	if (vaddr)
+		return vaddr;
+
+	pg_off = paddr & PAGE_MASK;
+	pg_sz = ((paddr + size + PAGE_SIZE - 1) & PAGE_MASK) - pg_off;
+	vaddr = ioremap(pg_off, pg_sz);
+	if (!vaddr)
+		return NULL;
+	map = kmalloc(sizeof(*map), GFP_KERNEL);
+	if (!map)
+		goto err_unmap;
+	INIT_LIST_HEAD(&map->list);
+	map->paddr = pg_off;
+	map->size = pg_sz;
+	map->vaddr = vaddr;
+	kref_init(&map->ref);
+
+	spin_lock_irqsave(&acpi_iomaps_lock, flags);
+	vaddr = __acpi_try_ioremap(paddr, size);
+	if (vaddr) {
+		spin_unlock_irqrestore(&acpi_iomaps_lock, flags);
+		iounmap(map->vaddr);
+		kfree(map);
+		return vaddr;
+	}
+	list_add_tail_rcu(&map->list, &acpi_iomaps);
+	spin_unlock_irqrestore(&acpi_iomaps_lock, flags);
+
+	return vaddr + (paddr - pg_off);
+err_unmap:
+	iounmap(vaddr);
+	return NULL;
+}
+
+/* acpi_iomaps_lock must be held before calling */
+static void __acpi_kref_del_iomap(struct kref *ref)
+{
+	struct acpi_iomap *map;
+
+	map = container_of(ref, struct acpi_iomap, ref);
+	list_del_rcu(&map->list);
+}
+
+/*
+ * Used to post-unmap the specified IO memory area. The iounmap is
+ * done only if the reference count goes zero.
+ */
+static void acpi_post_unmap(phys_addr_t paddr, unsigned long size)
+{
+	struct acpi_iomap *map;
+	unsigned long flags;
+	int del;
+
+	spin_lock_irqsave(&acpi_iomaps_lock, flags);
+	map = __acpi_find_iomap(paddr, size);
+	BUG_ON(!map);
+	del = kref_put(&map->ref, __acpi_kref_del_iomap);
+	spin_unlock_irqrestore(&acpi_iomaps_lock, flags);
+
+	if (!del)
+		return;
+
+	synchronize_rcu();
+	iounmap(map->vaddr);
+	kfree(map);
+}
+
+/* In NMI handler, should set silent = 1 */
+static int acpi_check_gar(struct acpi_generic_address *reg,
+			  u64 *paddr, int silent)
+{
+	u32 width, space_id;
+
+	width = reg->bit_width;
+	space_id = reg->space_id;
+	/* Handle possible alignment issues */
+	memcpy(paddr, &reg->address, sizeof(*paddr));
+	if (!*paddr) {
+		if (!silent)
+			pr_warning(FW_BUG ACPI_PFX
+			"Invalid physical address in GAR [0x%llx/%u/%u]\n",
+				   *paddr, width, space_id);
+		return -EINVAL;
+	}
+
+	if ((width != 8) && (width != 16) && (width != 32) && (width != 64)) {
+		if (!silent)
+			pr_warning(FW_BUG ACPI_PFX
+				   "Invalid bit width in GAR [0x%llx/%u/%u]\n",
+				   *paddr, width, space_id);
+		return -EINVAL;
+	}
+
+	if (space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY &&
+	    space_id != ACPI_ADR_SPACE_SYSTEM_IO) {
+		if (!silent)
+			pr_warning(FW_BUG ACPI_PFX
+			"Invalid address space type in GAR [0x%llx/%u/%u]\n",
+				   *paddr, width, space_id);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* Pre-map, working on GAR */
+int acpi_pre_map_gar(struct acpi_generic_address *reg)
+{
+	u64 paddr;
+	void __iomem *vaddr;
+	int rc;
+
+	if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
+		return 0;
+
+	rc = acpi_check_gar(reg, &paddr, 0);
+	if (rc)
+		return rc;
+
+	vaddr = acpi_pre_map(paddr, reg->bit_width / 8);
+	if (!vaddr)
+		return -EIO;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_pre_map_gar);
+
+/* Post-unmap, working on GAR */
+int acpi_post_unmap_gar(struct acpi_generic_address *reg)
+{
+	u64 paddr;
+	int rc;
+
+	if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
+		return 0;
+
+	rc = acpi_check_gar(reg, &paddr, 0);
+	if (rc)
+		return rc;
+
+	acpi_post_unmap(paddr, reg->bit_width / 8);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_post_unmap_gar);
+
+/*
+ * Can be used in atomic (including NMI) or process context. RCU read
+ * lock can only be released after the IO memory area accessing.
+ */
+static int acpi_atomic_read_mem(u64 paddr, u64 *val, u32 width)
+{
+	void __iomem *addr;
+
+	rcu_read_lock();
+	addr = __acpi_ioremap_fast(paddr, width);
+	switch (width) {
+	case 8:
+		*val = readb(addr);
+		break;
+	case 16:
+		*val = readw(addr);
+		break;
+	case 32:
+		*val = readl(addr);
+		break;
+	case 64:
+		*val = readq(addr);
+		break;
+	default:
+		return -EINVAL;
+	}
+	rcu_read_unlock();
+
+	return 0;
+}
+
+static int acpi_atomic_write_mem(u64 paddr, u64 val, u32 width)
+{
+	void __iomem *addr;
+
+	rcu_read_lock();
+	addr = __acpi_ioremap_fast(paddr, width);
+	switch (width) {
+	case 8:
+		writeb(val, addr);
+		break;
+	case 16:
+		writew(val, addr);
+		break;
+	case 32:
+		writel(val, addr);
+		break;
+	case 64:
+		writeq(val, addr);
+		break;
+	default:
+		return -EINVAL;
+	}
+	rcu_read_unlock();
+
+	return 0;
+}
+
+/* GAR accessing in atomic (including NMI) or process context */
+int acpi_atomic_read(u64 *val, struct acpi_generic_address *reg)
+{
+	u64 paddr;
+	int rc;
+
+	rc = acpi_check_gar(reg, &paddr, 1);
+	if (rc)
+		return rc;
+
+	*val = 0;
+	switch (reg->space_id) {
+	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+		return acpi_atomic_read_mem(paddr, val, reg->bit_width);
+	case ACPI_ADR_SPACE_SYSTEM_IO:
+		return acpi_os_read_port(paddr, (u32 *)val, reg->bit_width);
+	default:
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL_GPL(acpi_atomic_read);
+
+int acpi_atomic_write(u64 val, struct acpi_generic_address *reg)
+{
+	u64 paddr;
+	int rc;
+
+	rc = acpi_check_gar(reg, &paddr, 1);
+	if (rc)
+		return rc;
+
+	switch (reg->space_id) {
+	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+		return acpi_atomic_write_mem(paddr, val, reg->bit_width);
+	case ACPI_ADR_SPACE_SYSTEM_IO:
+		return acpi_os_write_port(paddr, val, reg->bit_width);
+	default:
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL_GPL(acpi_atomic_write);
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 743576bf1bd..c1d23cd7165 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -69,6 +69,44 @@ static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = {
 };
 
 
+#ifdef CONFIG_X86
+static int set_copy_dsdt(const struct dmi_system_id *id)
+{
+	printk(KERN_NOTICE "%s detected - "
+		"force copy of DSDT to local memory\n", id->ident);
+	acpi_gbl_copy_dsdt_locally = 1;
+	return 0;
+}
+
+static struct dmi_system_id dsdt_dmi_table[] __initdata = {
+	/*
+	 * Insyde BIOS on some TOSHIBA machines corrupt the DSDT.
+	 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
+	 */
+	{
+	 .callback = set_copy_dsdt,
+	 .ident = "TOSHIBA Satellite A505",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Satellite A505"),
+		},
+	},
+	{
+	 .callback = set_copy_dsdt,
+	 .ident = "TOSHIBA Satellite L505D",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "Satellite L505D"),
+		},
+	},
+	{}
+};
+#else
+static struct dmi_system_id dsdt_dmi_table[] __initdata = {
+	{}
+};
+#endif
+
 /* --------------------------------------------------------------------------
                                 Device Management
    -------------------------------------------------------------------------- */
@@ -363,11 +401,6 @@ static void acpi_print_osc_error(acpi_handle handle,
 	printk("\n");
 }
 
-static u8 hex_val(unsigned char c)
-{
-	return isdigit(c) ? c - '0' : toupper(c) - 'A' + 10;
-}
-
 static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
 {
 	int i;
@@ -384,8 +417,8 @@ static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
 			return AE_BAD_PARAMETER;
 	}
 	for (i = 0; i < 16; i++) {
-		uuid[i] = hex_val(str[opc_map_to_uuid[i]]) << 4;
-		uuid[i] |= hex_val(str[opc_map_to_uuid[i] + 1]);
+		uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
+		uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
 	}
 	return AE_OK;
 }
@@ -813,6 +846,12 @@ void __init acpi_early_init(void)
 
 	acpi_gbl_permanent_mmap = 1;
 
+	/*
+	 * If the machine falls into the DMI check table,
+	 * DSDT will be copied to memory
+	 */
+	dmi_check_system(dsdt_dmi_table);
+
 	status = acpi_reallocate_root_table();
 	if (ACPI_FAILURE(status)) {
 		printk(KERN_ERR PREFIX
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 3f01f065b53..5f2027d782e 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1037,10 +1037,9 @@ int __init acpi_ec_ecdt_probe(void)
 		/* Don't trust ECDT, which comes from ASUSTek */
 		if (!EC_FLAGS_VALIDATE_ECDT)
 			goto install;
-		saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+		saved_ec = kmemdup(boot_ec, sizeof(struct acpi_ec), GFP_KERNEL);
 		if (!saved_ec)
 			return -ENOMEM;
-		memcpy(saved_ec, boot_ec, sizeof(struct acpi_ec));
 	/* fall through */
 	}
 
diff --git a/drivers/acpi/hed.c b/drivers/acpi/hed.c
new file mode 100644
index 00000000000..d0c1967f759
--- /dev/null
+++ b/drivers/acpi/hed.c
@@ -0,0 +1,112 @@
+/*
+ * ACPI Hardware Error Device (PNP0C33) Driver
+ *
+ * Copyright (C) 2010, Intel Corp.
+ *	Author: Huang Ying <ying.huang@intel.com>
+ *
+ * ACPI Hardware Error Device is used to report some hardware errors
+ * notified via SCI, mainly the corrected errors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/hed.h>
+
+static struct acpi_device_id acpi_hed_ids[] = {
+	{"PNP0C33", 0},
+	{"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, acpi_hed_ids);
+
+static acpi_handle hed_handle;
+
+static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list);
+
+int register_acpi_hed_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&acpi_hed_notify_list, nb);
+}
+EXPORT_SYMBOL_GPL(register_acpi_hed_notifier);
+
+void unregister_acpi_hed_notifier(struct notifier_block *nb)
+{
+	blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_acpi_hed_notifier);
+
+/*
+ * SCI to report hardware error is forwarded to the listeners of HED,
+ * it is used by HEST Generic Hardware Error Source with notify type
+ * SCI.
+ */
+static void acpi_hed_notify(struct acpi_device *device, u32 event)
+{
+	blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
+}
+
+static int __devinit acpi_hed_add(struct acpi_device *device)
+{
+	/* Only one hardware error device */
+	if (hed_handle)
+		return -EINVAL;
+	hed_handle = device->handle;
+	return 0;
+}
+
+static int __devexit acpi_hed_remove(struct acpi_device *device, int type)
+{
+	hed_handle = NULL;
+	return 0;
+}
+
+static struct acpi_driver acpi_hed_driver = {
+	.name = "hardware_error_device",
+	.class = "hardware_error",
+	.ids = acpi_hed_ids,
+	.ops = {
+		.add = acpi_hed_add,
+		.remove = acpi_hed_remove,
+		.notify = acpi_hed_notify,
+	},
+};
+
+static int __init acpi_hed_init(void)
+{
+	if (acpi_disabled)
+		return -ENODEV;
+
+	if (acpi_bus_register_driver(&acpi_hed_driver) < 0)
+		return -ENODEV;
+
+	return 0;
+}
+
+static void __exit acpi_hed_exit(void)
+{
+	acpi_bus_unregister_driver(&acpi_hed_driver);
+}
+
+module_init(acpi_hed_init);
+module_exit(acpi_hed_exit);
+
+ACPI_MODULE_NAME("hed");
+MODULE_AUTHOR("Huang Ying");
+MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/acpi/hest.c b/drivers/acpi/hest.c
deleted file mode 100644
index 1c527a19287..00000000000
--- a/drivers/acpi/hest.c
+++ /dev/null
@@ -1,139 +0,0 @@
-#include <linux/acpi.h>
-#include <linux/pci.h>
-
-#define PREFIX "ACPI: "
-
-static inline unsigned long parse_acpi_hest_ia_machine_check(struct acpi_hest_ia_machine_check *p)
-{
-	return sizeof(*p) +
-		(sizeof(struct acpi_hest_ia_error_bank) * p->num_hardware_banks);
-}
-
-static inline unsigned long parse_acpi_hest_ia_corrected(struct acpi_hest_ia_corrected *p)
-{
-	return sizeof(*p) +
-		(sizeof(struct acpi_hest_ia_error_bank) * p->num_hardware_banks);
-}
-
-static inline unsigned long parse_acpi_hest_ia_nmi(struct acpi_hest_ia_nmi *p)
-{
-	return sizeof(*p);
-}
-
-static inline unsigned long parse_acpi_hest_generic(struct acpi_hest_generic *p)
-{
-	return sizeof(*p);
-}
-
-static inline unsigned int hest_match_pci(struct acpi_hest_aer_common *p, struct pci_dev *pci)
-{
-	return	(0           == pci_domain_nr(pci->bus) &&
-		 p->bus      == pci->bus->number &&
-		 p->device   == PCI_SLOT(pci->devfn) &&
-		 p->function == PCI_FUNC(pci->devfn));
-}
-
-static unsigned long parse_acpi_hest_aer(void *hdr, int type, struct pci_dev *pci, int *firmware_first)
-{
-	struct acpi_hest_aer_common *p = hdr + sizeof(struct acpi_hest_header);
-	unsigned long rc=0;
-	u8 pcie_type = 0;
-	u8 bridge = 0;
-	switch (type) {
-	case ACPI_HEST_TYPE_AER_ROOT_PORT:
-		rc = sizeof(struct acpi_hest_aer_root);
-		pcie_type = PCI_EXP_TYPE_ROOT_PORT;
-		break;
-	case ACPI_HEST_TYPE_AER_ENDPOINT:
-		rc = sizeof(struct acpi_hest_aer);
-		pcie_type = PCI_EXP_TYPE_ENDPOINT;
-		break;
-	case ACPI_HEST_TYPE_AER_BRIDGE:
-		rc = sizeof(struct acpi_hest_aer_bridge);
-		if ((pci->class >> 16) == PCI_BASE_CLASS_BRIDGE)
-			bridge = 1;
-		break;
-	}
-
-	if (p->flags & ACPI_HEST_GLOBAL) {
-		if ((pci->is_pcie && (pci->pcie_type == pcie_type)) || bridge)
-			*firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
-	}
-	else
-		if (hest_match_pci(p, pci))
-			*firmware_first = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
-	return rc;
-}
-
-static int acpi_hest_firmware_first(struct acpi_table_header *stdheader, struct pci_dev *pci)
-{
-	struct acpi_table_hest *hest = (struct acpi_table_hest *)stdheader;
-	void *p = (void *)hest + sizeof(*hest); /* defined by the ACPI 4.0 spec */
-	struct acpi_hest_header *hdr = p;
-
-	int i;
-	int firmware_first = 0;
-	static unsigned char printed_unused = 0;
-	static unsigned char printed_reserved = 0;
-
-	for (i=0, hdr=p; p < (((void *)hest) + hest->header.length) && i < hest->error_source_count; i++) {
-		switch (hdr->type) {
-		case ACPI_HEST_TYPE_IA32_CHECK:
-			p += parse_acpi_hest_ia_machine_check(p);
-			break;
-		case ACPI_HEST_TYPE_IA32_CORRECTED_CHECK:
-			p += parse_acpi_hest_ia_corrected(p);
-			break;
-		case ACPI_HEST_TYPE_IA32_NMI:
-			p += parse_acpi_hest_ia_nmi(p);
-			break;
-		/* These three should never appear */
-		case ACPI_HEST_TYPE_NOT_USED3:
-		case ACPI_HEST_TYPE_NOT_USED4:
-		case ACPI_HEST_TYPE_NOT_USED5:
-			if (!printed_unused) {
-				printk(KERN_DEBUG PREFIX
-				       "HEST Error Source list contains an obsolete type (%d).\n", hdr->type);
-				printed_unused = 1;
-			}
-			break;
-		case ACPI_HEST_TYPE_AER_ROOT_PORT:
-		case ACPI_HEST_TYPE_AER_ENDPOINT:
-		case ACPI_HEST_TYPE_AER_BRIDGE:
-			p += parse_acpi_hest_aer(p, hdr->type, pci, &firmware_first);
-			break;
-		case ACPI_HEST_TYPE_GENERIC_ERROR:
-			p += parse_acpi_hest_generic(p);
-			break;
-		/* These should never appear either */
-		case ACPI_HEST_TYPE_RESERVED:
-		default:
-			if (!printed_reserved) {
-				printk(KERN_DEBUG PREFIX
-				       "HEST Error Source list contains a reserved type (%d).\n", hdr->type);
-				printed_reserved = 1;
-			}
-			break;
-		}
-	}
-	return firmware_first;
-}
-
-int acpi_hest_firmware_first_pci(struct pci_dev *pci)
-{
-	acpi_status status = AE_NOT_FOUND;
-	struct acpi_table_header *hest = NULL;
-
-	if (acpi_disabled)
-		return 0;
-
-	status = acpi_get_table(ACPI_SIG_HEST, 1, &hest);
-
-	if (ACPI_SUCCESS(status)) {
-		if (acpi_hest_firmware_first(hest, pci)) {
-			return 1;
-		}
-	}
-	return 0;
-}
-EXPORT_SYMBOL_GPL(acpi_hest_firmware_first_pci);
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 7594f65800c..78418ce4fc7 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1207,6 +1207,15 @@ int acpi_check_mem_region(resource_size_t start, resource_size_t n,
 EXPORT_SYMBOL(acpi_check_mem_region);
 
 /*
+ * Let drivers know whether the resource checks are effective
+ */
+int acpi_resources_are_enforced(void)
+{
+	return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
+}
+EXPORT_SYMBOL(acpi_resources_are_enforced);
+
+/*
  * Acquire a spinlock.
  *
  * handle is a pointer to the spinlock_t.
@@ -1406,7 +1415,7 @@ acpi_os_invalidate_address(
 	switch (space_id) {
 	case ACPI_ADR_SPACE_SYSTEM_IO:
 	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
-		/* Only interference checks against SystemIO and SytemMemory
+		/* Only interference checks against SystemIO and SystemMemory
 		   are needed */
 		res.start = address;
 		res.end = address + length - 1;
@@ -1458,7 +1467,7 @@ acpi_os_validate_address (
 	switch (space_id) {
 	case ACPI_ADR_SPACE_SYSTEM_IO:
 	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
-		/* Only interference checks against SystemIO and SytemMemory
+		/* Only interference checks against SystemIO and SystemMemory
 		   are needed */
 		res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
 		if (!res)
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index b0a71ecee68..e4804fb05e2 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -401,11 +401,13 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
 	 * driver reported one, then use it. Exit in any case.
 	 */
 	if (gsi < 0) {
+		u32 dev_gsi;
 		dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin));
 		/* Interrupt Line values above 0xF are forbidden */
-		if (dev->irq > 0 && (dev->irq <= 0xF)) {
-			printk(" - using IRQ %d\n", dev->irq);
-			acpi_register_gsi(&dev->dev, dev->irq,
+		if (dev->irq > 0 && (dev->irq <= 0xF) &&
+		    (acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) {
+			printk(" - using ISA IRQ %d\n", dev->irq);
+			acpi_register_gsi(&dev->dev, dev_gsi,
 					  ACPI_LEVEL_SENSITIVE,
 					  ACPI_ACTIVE_LOW);
 			return 0;
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index aefce33f2a0..4eac59393ed 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -120,7 +120,8 @@ acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus)
 	struct acpi_pci_root *root;
 	
 	list_for_each_entry(root, &acpi_pci_roots, node)
-		if ((root->segment == (u16) seg) && (root->bus_nr == (u16) bus))
+		if ((root->segment == (u16) seg) &&
+		    (root->secondary.start == (u16) bus))
 			return root->device->handle;
 	return NULL;		
 }
@@ -154,7 +155,7 @@ EXPORT_SYMBOL_GPL(acpi_is_root_bridge);
 static acpi_status
 get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
 {
-	int *busnr = data;
+	struct resource *res = data;
 	struct acpi_resource_address64 address;
 
 	if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 &&
@@ -164,28 +165,27 @@ get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
 
 	acpi_resource_to_address64(resource, &address);
 	if ((address.address_length > 0) &&
-	    (address.resource_type == ACPI_BUS_NUMBER_RANGE))
-		*busnr = address.minimum;
+	    (address.resource_type == ACPI_BUS_NUMBER_RANGE)) {
+		res->start = address.minimum;
+		res->end = address.minimum + address.address_length - 1;
+	}
 
 	return AE_OK;
 }
 
 static acpi_status try_get_root_bridge_busnr(acpi_handle handle,
-					     unsigned long long *bus)
+					     struct resource *res)
 {
 	acpi_status status;
-	int busnum;
 
-	busnum = -1;
+	res->start = -1;
 	status =
 	    acpi_walk_resources(handle, METHOD_NAME__CRS,
-				get_root_bridge_busnr_callback, &busnum);
+				get_root_bridge_busnr_callback, res);
 	if (ACPI_FAILURE(status))
 		return status;
-	/* Check if we really get a bus number from _CRS */
-	if (busnum == -1)
+	if (res->start == -1)
 		return AE_ERROR;
-	*bus = busnum;
 	return AE_OK;
 }
 
@@ -429,34 +429,47 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
 	struct acpi_device *child;
 	u32 flags, base_flags;
 
+	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
+	if (!root)
+		return -ENOMEM;
+
 	segment = 0;
 	status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL,
 				       &segment);
 	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 		printk(KERN_ERR PREFIX "can't evaluate _SEG\n");
-		return -ENODEV;
+		result = -ENODEV;
+		goto end;
 	}
 
 	/* Check _CRS first, then _BBN.  If no _BBN, default to zero. */
-	bus = 0;
-	status = try_get_root_bridge_busnr(device->handle, &bus);
+	root->secondary.flags = IORESOURCE_BUS;
+	status = try_get_root_bridge_busnr(device->handle, &root->secondary);
 	if (ACPI_FAILURE(status)) {
+		/*
+		 * We need both the start and end of the downstream bus range
+		 * to interpret _CBA (MMCONFIG base address), so it really is
+		 * supposed to be in _CRS.  If we don't find it there, all we
+		 * can do is assume [_BBN-0xFF] or [0-0xFF].
+		 */
+		root->secondary.end = 0xFF;
+		printk(KERN_WARNING FW_BUG PREFIX
+		       "no secondary bus range in _CRS\n");
 		status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,					       NULL, &bus);
-		if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-			printk(KERN_ERR PREFIX
-			     "no bus number in _CRS and can't evaluate _BBN\n");
-			return -ENODEV;
+		if (ACPI_SUCCESS(status))
+			root->secondary.start = bus;
+		else if (status == AE_NOT_FOUND)
+			root->secondary.start = 0;
+		else {
+			printk(KERN_ERR PREFIX "can't evaluate _BBN\n");
+			result = -ENODEV;
+			goto end;
 		}
 	}
 
-	root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
-	if (!root)
-		return -ENOMEM;
-
 	INIT_LIST_HEAD(&root->node);
 	root->device = device;
 	root->segment = segment & 0xFFFF;
-	root->bus_nr = bus & 0xFF;
 	strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
 	strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
 	device->driver_data = root;
@@ -475,9 +488,9 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
 	/* TBD: Locking */
 	list_add_tail(&root->node, &acpi_pci_roots);
 
-	printk(KERN_INFO PREFIX "%s [%s] (%04x:%02x)\n",
+	printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
 	       acpi_device_name(device), acpi_device_bid(device),
-	       root->segment, root->bus_nr);
+	       root->segment, &root->secondary);
 
 	/*
 	 * Scan the Root Bridge
@@ -486,11 +499,11 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
 	 * PCI namespace does not get created until this call is made (and 
 	 * thus the root bridge's pci_dev does not exist).
 	 */
-	root->bus = pci_acpi_scan_root(device, segment, bus);
+	root->bus = pci_acpi_scan_root(root);
 	if (!root->bus) {
 		printk(KERN_ERR PREFIX
 			    "Bus %04x:%02x not present in PCI namespace\n",
-			    root->segment, root->bus_nr);
+			    root->segment, (unsigned int)root->secondary.start);
 		result = -ENODEV;
 		goto end;
 	}
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index ddc76787b84..f74d3b31e5c 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -172,7 +172,6 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
 		return -EINVAL;
 
 	/* The state of the list is 'on' IFF all resources are 'on'. */
-	/* */
 
 	for (i = 0; i < list->count; i++) {
 		/*
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index 5675d9747e8..b1034a9ada4 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -616,7 +616,8 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device)
 	acpi_processor_get_limit_info(pr);
 
 
-	acpi_processor_power_init(pr, device);
+	if (cpuidle_get_driver() == &acpi_idle_driver)
+		acpi_processor_power_init(pr, device);
 
 	pr->cdev = thermal_cooling_device_register("Processor", device,
 						&processor_cooling_ops);
@@ -920,9 +921,14 @@ static int __init acpi_processor_init(void)
 	if (!acpi_processor_dir)
 		return -ENOMEM;
 #endif
-	result = cpuidle_register_driver(&acpi_idle_driver);
-	if (result < 0)
-		goto out_proc;
+
+	if (!cpuidle_register_driver(&acpi_idle_driver)) {
+		printk(KERN_DEBUG "ACPI: %s registered with cpuidle\n",
+			acpi_idle_driver.name);
+	} else {
+		printk(KERN_DEBUG "ACPI: acpi_idle yielding to %s",
+			cpuidle_get_driver()->name);
+	}
 
 	result = acpi_bus_register_driver(&acpi_processor_driver);
 	if (result < 0)
@@ -941,7 +947,6 @@ static int __init acpi_processor_init(void)
 out_cpuidle:
 	cpuidle_unregister_driver(&acpi_idle_driver);
 
-out_proc:
 #ifdef CONFIG_ACPI_PROCFS
 	remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
 #endif
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 5939e7f7d8e..2e8c27d48f2 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -698,7 +698,7 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
 		   "max_cstate:              C%d\n"
 		   "maximum allowed latency: %d usec\n",
 		   pr->power.state ? pr->power.state - pr->power.states : 0,
-		   max_cstate, pm_qos_requirement(PM_QOS_CPU_DMA_LATENCY));
+		   max_cstate, pm_qos_request(PM_QOS_CPU_DMA_LATENCY));
 
 	seq_puts(seq, "states:\n");
 
@@ -727,19 +727,9 @@ static int acpi_processor_power_seq_show(struct seq_file *seq, void *offset)
 			break;
 		}
 
-		if (pr->power.states[i].promotion.state)
-			seq_printf(seq, "promotion[C%zd] ",
-				   (pr->power.states[i].promotion.state -
-				    pr->power.states));
-		else
-			seq_puts(seq, "promotion[--] ");
+		seq_puts(seq, "promotion[--] ");
 
-		if (pr->power.states[i].demotion.state)
-			seq_printf(seq, "demotion[C%zd] ",
-				   (pr->power.states[i].demotion.state -
-				    pr->power.states));
-		else
-			seq_puts(seq, "demotion[--] ");
+		seq_puts(seq, "demotion[--] ");
 
 		seq_printf(seq, "latency[%03d] usage[%08d] duration[%020llu]\n",
 			   pr->power.states[i].latency,
@@ -869,6 +859,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 	struct acpi_processor *pr;
 	struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
 	ktime_t  kt1, kt2;
+	s64 idle_time_ns;
 	s64 idle_time;
 	s64 sleep_ticks = 0;
 
@@ -881,6 +872,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 		return(acpi_idle_enter_c1(dev, state));
 
 	local_irq_disable();
+
 	if (cx->entry_method != ACPI_CSTATE_FFH) {
 		current_thread_info()->status &= ~TS_POLLING;
 		/*
@@ -888,12 +880,12 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 		 * NEED_RESCHED:
 		 */
 		smp_mb();
-	}
 
-	if (unlikely(need_resched())) {
-		current_thread_info()->status |= TS_POLLING;
-		local_irq_enable();
-		return 0;
+		if (unlikely(need_resched())) {
+			current_thread_info()->status |= TS_POLLING;
+			local_irq_enable();
+			return 0;
+		}
 	}
 
 	/*
@@ -910,15 +902,18 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 	sched_clock_idle_sleep_event();
 	acpi_idle_do_entry(cx);
 	kt2 = ktime_get_real();
-	idle_time =  ktime_to_us(ktime_sub(kt2, kt1));
+	idle_time_ns = ktime_to_ns(ktime_sub(kt2, kt1));
+	idle_time = idle_time_ns;
+	do_div(idle_time, NSEC_PER_USEC);
 
 	sleep_ticks = us_to_pm_timer_ticks(idle_time);
 
 	/* Tell the scheduler how much we idled: */
-	sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
+	sched_clock_idle_wakeup_event(idle_time_ns);
 
 	local_irq_enable();
-	current_thread_info()->status |= TS_POLLING;
+	if (cx->entry_method != ACPI_CSTATE_FFH)
+		current_thread_info()->status |= TS_POLLING;
 
 	cx->usage++;
 
@@ -943,6 +938,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 	struct acpi_processor *pr;
 	struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
 	ktime_t  kt1, kt2;
+	s64 idle_time_ns;
 	s64 idle_time;
 	s64 sleep_ticks = 0;
 
@@ -968,6 +964,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 	}
 
 	local_irq_disable();
+
 	if (cx->entry_method != ACPI_CSTATE_FFH) {
 		current_thread_info()->status &= ~TS_POLLING;
 		/*
@@ -975,12 +972,12 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 		 * NEED_RESCHED:
 		 */
 		smp_mb();
-	}
 
-	if (unlikely(need_resched())) {
-		current_thread_info()->status |= TS_POLLING;
-		local_irq_enable();
-		return 0;
+		if (unlikely(need_resched())) {
+			current_thread_info()->status |= TS_POLLING;
+			local_irq_enable();
+			return 0;
+		}
 	}
 
 	acpi_unlazy_tlb(smp_processor_id());
@@ -1025,14 +1022,17 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 		spin_unlock(&c3_lock);
 	}
 	kt2 = ktime_get_real();
-	idle_time =  ktime_to_us(ktime_sub(kt2, kt1));
+	idle_time_ns = ktime_to_us(ktime_sub(kt2, kt1));
+	idle_time = idle_time_ns;
+	do_div(idle_time, NSEC_PER_USEC);
 
 	sleep_ticks = us_to_pm_timer_ticks(idle_time);
 	/* Tell the scheduler how much we idled: */
-	sched_clock_idle_wakeup_event(sleep_ticks*PM_TIMER_TICK_NS);
+	sched_clock_idle_wakeup_event(idle_time_ns);
 
 	local_irq_enable();
-	current_thread_info()->status |= TS_POLLING;
+	if (cx->entry_method != ACPI_CSTATE_FFH)
+		current_thread_info()->status |= TS_POLLING;
 
 	cx->usage++;
 
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 0338f513a01..7f2e051ed4f 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -765,7 +765,7 @@ static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
 	}
 
 	status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number,
-					ACPI_NOT_ISR, &event_status);
+					&event_status);
 	if (status == AE_OK)
 		device->wakeup.flags.run_wake =
 				!!(event_status & ACPI_EVENT_FLAG_HANDLE);
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 504a55edac4..3fb4bdea7e0 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -80,22 +80,6 @@ static int acpi_sleep_prepare(u32 acpi_state)
 
 #ifdef CONFIG_ACPI_SLEEP
 static u32 acpi_target_sleep_state = ACPI_STATE_S0;
-/*
- * According to the ACPI specification the BIOS should make sure that ACPI is
- * enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states.  Still,
- * some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI
- * on such systems during resume.  Unfortunately that doesn't help in
- * particularly pathological cases in which SCI_EN has to be set directly on
- * resume, although the specification states very clearly that this flag is
- * owned by the hardware.  The set_sci_en_on_resume variable will be set in such
- * cases.
- */
-static bool set_sci_en_on_resume;
-
-void __init acpi_set_sci_en_on_resume(void)
-{
-	set_sci_en_on_resume = true;
-}
 
 /*
  * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
@@ -256,11 +240,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
 		break;
 	}
 
-	/* If ACPI is not enabled by the BIOS, we need to enable it here. */
-	if (set_sci_en_on_resume)
-		acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
-	else
-		acpi_enable();
+	/* This violates the spec but is required for bug compatibility. */
+	acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
 
 	/* Reprogram control registers and execute _BFS */
 	acpi_leave_sleep_state_prep(acpi_state);
@@ -357,12 +338,6 @@ static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
 	return 0;
 }
 
-static int __init init_set_sci_en_on_resume(const struct dmi_system_id *d)
-{
-	set_sci_en_on_resume = true;
-	return 0;
-}
-
 static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
 	{
 	.callback = init_old_suspend_ordering,
@@ -381,22 +356,6 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
 		},
 	},
 	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Apple MacBook 1,1",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
-		DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Apple MacMini 1,1",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
-		DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
-		},
-	},
-	{
 	.callback = init_old_suspend_ordering,
 	.ident = "Asus Pundit P1-AH2 (M2N8L motherboard)",
 	.matches = {
@@ -405,94 +364,6 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
 		},
 	},
 	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Toshiba Satellite L300",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
-		DMI_MATCH(DMI_PRODUCT_NAME, "Satellite L300"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Hewlett-Packard HP G7000 Notebook PC",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-		DMI_MATCH(DMI_PRODUCT_NAME, "HP G7000 Notebook PC"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Hewlett-Packard HP Pavilion dv3 Notebook PC",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-		DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv3 Notebook PC"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Hewlett-Packard Pavilion dv4",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-		DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv4"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Hewlett-Packard Pavilion dv7",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-		DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv7"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Hewlett-Packard Compaq Presario C700 Notebook PC",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-		DMI_MATCH(DMI_PRODUCT_NAME, "Compaq Presario C700 Notebook PC"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Hewlett-Packard Compaq Presario CQ40 Notebook PC",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
-		DMI_MATCH(DMI_PRODUCT_NAME, "Compaq Presario CQ40 Notebook PC"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Lenovo ThinkPad T410",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-		DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T410"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Lenovo ThinkPad T510",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-		DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T510"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Lenovo ThinkPad W510",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-		DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W510"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Lenovo ThinkPad X201[s]",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-		DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201"),
-		},
-	},
-	{
 	.callback = init_old_suspend_ordering,
 	.ident = "Panasonic CF51-2L",
 	.matches = {
@@ -501,30 +372,6 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
 		DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"),
 		},
 	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Dell Studio 1558",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-		DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1558"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Dell Studio 1557",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-		DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
-		},
-	},
-	{
-	.callback = init_set_sci_en_on_resume,
-	.ident = "Dell Studio 1555",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-		DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1555"),
-		},
-	},
 	{},
 };
 #endif /* CONFIG_SUSPEND */
diff --git a/drivers/acpi/sleep.h b/drivers/acpi/sleep.h
index 8a8f3b3382a..25b8bd14928 100644
--- a/drivers/acpi/sleep.h
+++ b/drivers/acpi/sleep.h
@@ -1,6 +1,6 @@
 
 extern u8 sleep_states[];
-extern int acpi_suspend (u32 state);
+extern int acpi_suspend(u32 state);
 
 extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
 extern void acpi_enable_wakeup_device(u8 sleep_state);
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
index 4aaf2497613..c79e789ed03 100644
--- a/drivers/acpi/system.c
+++ b/drivers/acpi/system.c
@@ -71,7 +71,7 @@ struct acpi_table_attr {
 	struct list_head node;
 };
 
-static ssize_t acpi_table_show(struct kobject *kobj,
+static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
 			       struct bin_attribute *bin_attr, char *buf,
 			       loff_t offset, size_t count)
 {
@@ -303,8 +303,7 @@ static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
 				"Invalid GPE 0x%x\n", index));
 			goto end;
 		}
-		result = acpi_get_gpe_status(*handle, index,
-						ACPI_NOT_ISR, status);
+		result = acpi_get_gpe_status(*handle, index, status);
 	} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
 		result = acpi_get_event_status(index - num_gpes, status);
 
@@ -395,7 +394,7 @@ static ssize_t counter_set(struct kobject *kobj,
 			result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE);
 		else if (!strcmp(buf, "clear\n") &&
 				(status & ACPI_EVENT_FLAG_SET))
-			result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR);
+			result = acpi_clear_gpe(handle, index);
 		else
 			all_counters[index].count = strtoul(buf, NULL, 0);
 	} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 8a0ed2800e6..f336bca7c45 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -213,7 +213,7 @@ acpi_table_parse_entries(char *id,
 	unsigned long table_end;
 	acpi_size tbl_size;
 
-	if (acpi_disabled && !acpi_ht)
+	if (acpi_disabled)
 		return -ENODEV;
 
 	if (!handler)
@@ -280,7 +280,7 @@ int __init acpi_table_parse(char *id, acpi_table_handler handler)
 	struct acpi_table_header *table = NULL;
 	acpi_size tbl_size;
 
-	if (acpi_disabled && !acpi_ht)
+	if (acpi_disabled)
 		return -ENODEV;
 
 	if (!handler)
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index a0c93b32148..9865d46f49a 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -45,6 +45,7 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 #include <linux/suspend.h>
+#include <acpi/video.h>
 
 #define PREFIX "ACPI: "
 
@@ -65,11 +66,6 @@
 
 #define MAX_NAME_LEN	20
 
-#define ACPI_VIDEO_DISPLAY_CRT	1
-#define ACPI_VIDEO_DISPLAY_TV	2
-#define ACPI_VIDEO_DISPLAY_DVI	3
-#define ACPI_VIDEO_DISPLAY_LCD	4
-
 #define _COMPONENT		ACPI_VIDEO_COMPONENT
 ACPI_MODULE_NAME("video");
 
@@ -1007,11 +1003,11 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
 		result = acpi_video_init_brightness(device);
 		if (result)
 			return;
-		name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+		name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
 		if (!name)
 			return;
+		count++;
 
-		sprintf(name, "acpi_video%d", count++);
 		memset(&props, 0, sizeof(struct backlight_properties));
 		props.max_brightness = device->brightness->count - 3;
 		device->backlight = backlight_device_register(name, NULL, device,
@@ -1067,10 +1063,10 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
 		if (device->cap._DCS && device->cap._DSS) {
 			static int count;
 			char *name;
-			name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+			name = kasprintf(GFP_KERNEL, "acpi_video%d", count);
 			if (!name)
 				return;
-			sprintf(name, "acpi_video%d", count++);
+			count++;
 			device->output_dev = video_output_register(name,
 					NULL, device, &acpi_output_properties);
 			kfree(name);
@@ -1748,11 +1744,27 @@ acpi_video_get_device_attr(struct acpi_video_bus *video, unsigned long device_id
 }
 
 static int
+acpi_video_get_device_type(struct acpi_video_bus *video,
+			   unsigned long device_id)
+{
+	struct acpi_video_enumerated_device *ids;
+	int i;
+
+	for (i = 0; i < video->attached_count; i++) {
+		ids = &video->attached_array[i];
+		if ((ids->value.int_val & 0xffff) == device_id)
+			return ids->value.int_val;
+	}
+
+	return 0;
+}
+
+static int
 acpi_video_bus_get_one_device(struct acpi_device *device,
 			      struct acpi_video_bus *video)
 {
 	unsigned long long device_id;
-	int status;
+	int status, device_type;
 	struct acpi_video_device *data;
 	struct acpi_video_device_attrib* attribute;
 
@@ -1797,8 +1809,25 @@ acpi_video_bus_get_one_device(struct acpi_device *device,
 			}
 			if(attribute->bios_can_detect)
 				data->flags.bios = 1;
-		} else
-			data->flags.unknown = 1;
+		} else {
+			/* Check for legacy IDs */
+			device_type = acpi_video_get_device_type(video,
+								 device_id);
+			/* Ignore bits 16 and 18-20 */
+			switch (device_type & 0xffe2ffff) {
+			case ACPI_VIDEO_DISPLAY_LEGACY_MONITOR:
+				data->flags.crt = 1;
+				break;
+			case ACPI_VIDEO_DISPLAY_LEGACY_PANEL:
+				data->flags.lcd = 1;
+				break;
+			case ACPI_VIDEO_DISPLAY_LEGACY_TV:
+				data->flags.tvout = 1;
+				break;
+			default:
+				data->flags.unknown = 1;
+			}
+		}
 
 		acpi_video_device_bind(video, data);
 		acpi_video_device_find_cap(data);
@@ -2032,6 +2061,71 @@ out:
 	return result;
 }
 
+int acpi_video_get_edid(struct acpi_device *device, int type, int device_id,
+			void **edid)
+{
+	struct acpi_video_bus *video;
+	struct acpi_video_device *video_device;
+	union acpi_object *buffer = NULL;
+	acpi_status status;
+	int i, length;
+
+	if (!device || !acpi_driver_data(device))
+		return -EINVAL;
+
+	video = acpi_driver_data(device);
+
+	for (i = 0; i < video->attached_count; i++) {
+		video_device = video->attached_array[i].bind_info;
+		length = 256;
+
+		if (!video_device)
+			continue;
+
+		if (type) {
+			switch (type) {
+			case ACPI_VIDEO_DISPLAY_CRT:
+				if (!video_device->flags.crt)
+					continue;
+				break;
+			case ACPI_VIDEO_DISPLAY_TV:
+				if (!video_device->flags.tvout)
+					continue;
+				break;
+			case ACPI_VIDEO_DISPLAY_DVI:
+				if (!video_device->flags.dvi)
+					continue;
+				break;
+			case ACPI_VIDEO_DISPLAY_LCD:
+				if (!video_device->flags.lcd)
+					continue;
+				break;
+			}
+		} else if (video_device->device_id != device_id) {
+			continue;
+		}
+
+		status = acpi_video_device_EDID(video_device, &buffer, length);
+
+		if (ACPI_FAILURE(status) || !buffer ||
+		    buffer->type != ACPI_TYPE_BUFFER) {
+			length = 128;
+			status = acpi_video_device_EDID(video_device, &buffer,
+							length);
+			if (ACPI_FAILURE(status) || !buffer ||
+			    buffer->type != ACPI_TYPE_BUFFER) {
+				continue;
+			}
+		}
+
+		*edid = buffer->buffer.pointer;
+		return length;
+	}
+
+	return -ENODEV;
+}
+EXPORT_SYMBOL(acpi_video_get_edid);
+
 static int
 acpi_video_bus_get_devices(struct acpi_video_bus *video,
 			   struct acpi_device *device)
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index fc2f26b9b40..c5fef01b3c9 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -250,7 +250,7 @@ static int __init acpi_backlight(char *str)
 				ACPI_VIDEO_BACKLIGHT_FORCE_VENDOR;
 		if (!strcmp("video", str))
 			acpi_video_support |=
-				ACPI_VIDEO_OUTPUT_SWITCHING_FORCE_VIDEO;
+				ACPI_VIDEO_BACKLIGHT_FORCE_VIDEO;
 	}
 	return 1;
 }