Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

50 files changed, 1755 insertions, 121 deletions

diff --git a/include/asm-arm/arch-ixp4xx/debug-macro.S b/include/asm-arm/arch-ixp4xx/debug-macro.S
index 45a6c6cc29d..2e23651e217 100644
--- a/include/asm-arm/arch-ixp4xx/debug-macro.S
+++ b/include/asm-arm/arch-ixp4xx/debug-macro.S
@@ -14,8 +14,8 @@
                 mrc     p15, 0, \rx, c1, c0
                 tst     \rx, #1                 @ MMU enabled?
                 moveq   \rx, #0xc8000000
-		orrne	\rx, \rx, #0x00b00000
                 movne   \rx, #0xff000000
+		orrne	\rx, \rx, #0x00b00000
                 add     \rx,\rx,#3              @ Uart regs are at off set of 3 if
 						@ byte writes used - Big Endian.
                 .endm
diff --git a/include/asm-arm/arch-omap/usb.h b/include/asm-arm/arch-omap/usb.h
index 1438c6cef0c..054fb9a8e0c 100644
--- a/include/asm-arm/arch-omap/usb.h
+++ b/include/asm-arm/arch-omap/usb.h
@@ -47,6 +47,15 @@
 #	define	 HMC_TLLATTACH		(1 << 6)
 #	define	 OTG_HMC(w)		(((w)>>0)&0x3f)
 #define OTG_CTRL_REG			OTG_REG32(0x0c)
+#	define	 OTG_USB2_EN		(1 << 29)
+#	define	 OTG_USB2_DP		(1 << 28)
+#	define	 OTG_USB2_DM		(1 << 27)
+#	define	 OTG_USB1_EN		(1 << 26)
+#	define	 OTG_USB1_DP		(1 << 25)
+#	define	 OTG_USB1_DM		(1 << 24)
+#	define	 OTG_USB0_EN		(1 << 23)
+#	define	 OTG_USB0_DP		(1 << 22)
+#	define	 OTG_USB0_DM		(1 << 21)
 #	define	 OTG_ASESSVLD		(1 << 20)
 #	define	 OTG_BSESSEND		(1 << 19)
 #	define	 OTG_BSESSVLD		(1 << 18)
diff --git a/include/asm-arm/ide.h b/include/asm-arm/ide.h
index 2114acb3d23..4f68c8a5a19 100644
--- a/include/asm-arm/ide.h
+++ b/include/asm-arm/ide.h
@@ -5,7 +5,7 @@
  */
 
 /*
- *  This file contains the i386 architecture specific IDE code.
+ *  This file contains the ARM architecture specific IDE code.
  */
 
 #ifndef __ASMARM_IDE_H
diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
index cc4b5f5dbfc..cfa71a0dffb 100644
--- a/include/asm-arm/io.h
+++ b/include/asm-arm/io.h
@@ -82,7 +82,7 @@ extern void __readwrite_bug(const char *fn);
  * only.  Their primary purpose is to access PCI and ISA peripherals.
  *
  * Note that for a big endian machine, this implies that the following
- * big endian mode connectivity is in place, as described by numerious
+ * big endian mode connectivity is in place, as described by numerous
  * ARM documents:
  *
  *    PCI:  D0-D7   D8-D15 D16-D23 D24-D31
diff --git a/include/asm-arm/mach/time.h b/include/asm-arm/mach/time.h
index 047980ad18d..2cf279a4401 100644
--- a/include/asm-arm/mach/time.h
+++ b/include/asm-arm/mach/time.h
@@ -60,6 +60,8 @@ struct dyn_tick_timer {
 };
 
 void timer_dyn_reprogram(void);
+#else
+#define timer_dyn_reprogram()	do { } while (0)
 #endif
 
 extern struct sys_timer *system_timer;
diff --git a/include/asm-i386/ide.h b/include/asm-i386/ide.h
index 859ebf4da63..79dfab87135 100644
--- a/include/asm-i386/ide.h
+++ b/include/asm-i386/ide.h
@@ -41,13 +41,17 @@ static __inline__ int ide_default_irq(unsigned long base)
 
 static __inline__ unsigned long ide_default_io_base(int index)
 {
+	if (pci_find_device(PCI_ANY_ID, PCI_ANY_ID, NULL) == NULL) {
+		switch(index) {
+			case 2: return 0x1e8;
+			case 3: return 0x168;
+			case 4: return 0x1e0;
+			case 5: return 0x160;
+		}
+	}
 	switch (index) {
 		case 0:	return 0x1f0;
 		case 1:	return 0x170;
-		case 2: return 0x1e8;
-		case 3: return 0x168;
-		case 4: return 0x1e0;
-		case 5: return 0x160;
 		default:
 			return 0;
 	}
diff --git a/include/asm-i386/tlbflush.h b/include/asm-i386/tlbflush.h
index f22fab0cea2..ab216e1370e 100644
--- a/include/asm-i386/tlbflush.h
+++ b/include/asm-i386/tlbflush.h
@@ -22,16 +22,18 @@
  */
 #define __flush_tlb_global()						\
 	do {								\
-		unsigned int tmpreg;					\
+		unsigned int tmpreg, cr4, cr4_orig;			\
 									\
 		__asm__ __volatile__(					\
-			"movl %1, %%cr4;  # turn off PGE     \n"	\
+			"movl %%cr4, %2;  # turn off PGE     \n"	\
+			"movl %2, %1;                        \n"	\
+			"andl %3, %1;                        \n"	\
+			"movl %1, %%cr4;                     \n"	\
 			"movl %%cr3, %0;                     \n"	\
 			"movl %0, %%cr3;  # flush TLB        \n"	\
 			"movl %2, %%cr4;  # turn PGE back on \n"	\
-			: "=&r" (tmpreg)				\
-			: "r" (mmu_cr4_features & ~X86_CR4_PGE),	\
-			  "r" (mmu_cr4_features)			\
+			: "=&r" (tmpreg), "=&r" (cr4), "=&r" (cr4_orig)	\
+			: "i" (~X86_CR4_PGE)				\
 			: "memory");					\
 	} while (0)
 
diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h
index 176413fb9ae..e25e4c71a87 100644
--- a/include/asm-i386/unistd.h
+++ b/include/asm-i386/unistd.h
@@ -294,8 +294,10 @@
 #define __NR_add_key		286
 #define __NR_request_key	287
 #define __NR_keyctl		288
+#define __NR_ioprio_set		289
+#define __NR_ioprio_get		290
 
-#define NR_syscalls 289
+#define NR_syscalls 291
 
 /*
  * user-visible error numbers are in the range -1 - -128: see
diff --git a/include/asm-ia64/kprobes.h b/include/asm-ia64/kprobes.h
index 7b700035e36..bf36a32e37e 100644
--- a/include/asm-ia64/kprobes.h
+++ b/include/asm-ia64/kprobes.h
@@ -28,6 +28,7 @@
 #include <linux/ptrace.h>
 #include <asm/break.h>
 
+#define MAX_INSN_SIZE   16
 #define BREAK_INST	(long)(__IA64_BREAK_KPROBE << 6)
 
 typedef union cmp_inst {
@@ -63,6 +64,8 @@ typedef struct _bundle {
 
 #define JPROBE_ENTRY(pentry)	(kprobe_opcode_t *)pentry
 
+#define ARCH_SUPPORTS_KRETPROBES
+
 #define SLOT0_OPCODE_SHIFT	(37)
 #define SLOT1_p1_OPCODE_SHIFT	(37 - (64-46))
 #define SLOT2_OPCODE_SHIFT 	(37)
@@ -94,11 +97,6 @@ struct arch_specific_insn {
 };
 
 /* ia64 does not need this */
-static inline void jprobe_return(void)
-{
-}
-
-/* ia64 does not need this */
 static inline void arch_copy_kprobe(struct kprobe *p)
 {
 }
@@ -106,6 +104,12 @@ static inline void arch_copy_kprobe(struct kprobe *p)
 #ifdef CONFIG_KPROBES
 extern int kprobe_exceptions_notify(struct notifier_block *self,
 				    unsigned long val, void *data);
+
+/* ia64 does not need this */
+static inline void jprobe_return(void)
+{
+}
+
 #else				/* !CONFIG_KPROBES */
 static inline int kprobe_exceptions_notify(struct notifier_block *self,
 					   unsigned long val, void *data)
diff --git a/include/asm-ia64/sections.h b/include/asm-ia64/sections.h
index 8e3dbde1b42..e9eb7f62d32 100644
--- a/include/asm-ia64/sections.h
+++ b/include/asm-ia64/sections.h
@@ -17,6 +17,7 @@ extern char __start_gate_vtop_patchlist[], __end_gate_vtop_patchlist[];
 extern char __start_gate_fsyscall_patchlist[], __end_gate_fsyscall_patchlist[];
 extern char __start_gate_brl_fsys_bubble_down_patchlist[], __end_gate_brl_fsys_bubble_down_patchlist[];
 extern char __start_unwind[], __end_unwind[];
+extern char __start_ivt_text[], __end_ivt_text[];
 
 #endif /* _ASM_IA64_SECTIONS_H */
 
diff --git a/include/asm-ia64/unistd.h b/include/asm-ia64/unistd.h
index f7f43ec2483..517f1649ee6 100644
--- a/include/asm-ia64/unistd.h
+++ b/include/asm-ia64/unistd.h
@@ -263,6 +263,8 @@
 #define __NR_add_key			1271
 #define __NR_request_key		1272
 #define __NR_keyctl			1273
+#define __NR_ioprio_set			1274
+#define __NR_ioprio_get			1275
 #define __NR_set_zone_reclaim		1276
 
 #ifdef __KERNEL__
diff --git a/include/asm-ppc/open_pic.h b/include/asm-ppc/open_pic.h
index dbe85331974..7848aa610c0 100644
--- a/include/asm-ppc/open_pic.h
+++ b/include/asm-ppc/open_pic.h
@@ -25,6 +25,11 @@
 #define OPENPIC_VEC_IPI		118	/* and up */
 #define OPENPIC_VEC_SPURIOUS	255
 
+/* Priorities */
+#define OPENPIC_PRIORITY_IPI_BASE	10
+#define OPENPIC_PRIORITY_DEFAULT	4
+#define OPENPIC_PRIORITY_NMI		9
+
 /* OpenPIC IRQ controller structure */
 extern struct hw_interrupt_type open_pic;
 
@@ -42,6 +47,7 @@ extern int epic_serial_mode;
 extern void openpic_set_sources(int first_irq, int num_irqs, void __iomem *isr);
 extern void openpic_init(int linux_irq_offset);
 extern void openpic_init_nmi_irq(u_int irq);
+extern void openpic_set_irq_priority(u_int irq, u_int pri);
 extern void openpic_hookup_cascade(u_int irq, char *name,
 				   int (*cascade_fn)(struct pt_regs *));
 extern u_int openpic_irq(void);
diff --git a/include/asm-ppc/unistd.h b/include/asm-ppc/unistd.h
index cc51e5c9acc..e8b79220b29 100644
--- a/include/asm-ppc/unistd.h
+++ b/include/asm-ppc/unistd.h
@@ -277,8 +277,10 @@
 #define __NR_request_key	270
 #define __NR_keyctl		271
 #define __NR_waitid		272
+#define __NR_ioprio_set		273
+#define __NR_ioprio_get		274
 
-#define __NR_syscalls		273
+#define __NR_syscalls		275
 
 #define __NR(n)	#n
 
diff --git a/include/asm-ppc64/kprobes.h b/include/asm-ppc64/kprobes.h
index 19b468bed05..0802919c323 100644
--- a/include/asm-ppc64/kprobes.h
+++ b/include/asm-ppc64/kprobes.h
@@ -42,10 +42,13 @@ typedef unsigned int kprobe_opcode_t;
 
 #define JPROBE_ENTRY(pentry)	(kprobe_opcode_t *)((func_descr_t *)pentry)
 
+#define ARCH_SUPPORTS_KRETPROBES
+void kretprobe_trampoline(void);
+
 /* Architecture specific copy of original instruction */
 struct arch_specific_insn {
 	/* copy of original instruction */
-	kprobe_opcode_t insn[MAX_INSN_SIZE];
+	kprobe_opcode_t *insn;
 };
 
 #ifdef CONFIG_KPROBES
diff --git a/include/asm-sparc64/auxio.h b/include/asm-sparc64/auxio.h
index 5eb01dd4715..81a590a50a1 100644
--- a/include/asm-sparc64/auxio.h
+++ b/include/asm-sparc64/auxio.h
@@ -75,6 +75,8 @@
 
 #ifndef __ASSEMBLY__
 
+extern void __iomem *auxio_register;
+
 #define AUXIO_LTE_ON	1
 #define AUXIO_LTE_OFF	0
 
diff --git a/include/asm-sparc64/floppy.h b/include/asm-sparc64/floppy.h
index e071b4b4edf..49d49a28594 100644
--- a/include/asm-sparc64/floppy.h
+++ b/include/asm-sparc64/floppy.h
@@ -159,7 +159,7 @@ static void sun_82077_fd_outb(unsigned char value, unsigned long port)
  * underruns.  If non-zero, doing_pdma encodes the direction of
  * the transfer for debugging.  1=read 2=write
  */
-char *pdma_vaddr;
+unsigned char *pdma_vaddr;
 unsigned long pdma_size;
 volatile int doing_pdma = 0;
 
@@ -209,8 +209,7 @@ static void sun_fd_enable_dma(void)
 	pdma_areasize = pdma_size;
 }
 
-/* Our low-level entry point in arch/sparc/kernel/entry.S */
-extern irqreturn_t floppy_hardint(int irq, void *unused, struct pt_regs *regs);
+extern irqreturn_t sparc_floppy_irq(int, void *, struct pt_regs *);
 
 static int sun_fd_request_irq(void)
 {
@@ -220,8 +219,8 @@ static int sun_fd_request_irq(void)
 	if(!once) {
 		once = 1;
 
-		error = request_fast_irq(FLOPPY_IRQ, floppy_hardint, 
-					 SA_INTERRUPT, "floppy", NULL);
+		error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, 
+				    SA_INTERRUPT, "floppy", NULL);
 
 		return ((error == 0) ? 0 : -1);
 	}
@@ -615,7 +614,7 @@ static unsigned long __init sun_floppy_init(void)
 		struct linux_ebus *ebus;
 		struct linux_ebus_device *edev = NULL;
 		unsigned long config = 0;
-		unsigned long auxio_reg;
+		void __iomem *auxio_reg;
 
 		for_each_ebus(ebus) {
 			for_each_ebusdev(edev, ebus) {
@@ -642,7 +641,7 @@ static unsigned long __init sun_floppy_init(void)
 		/* Make sure the high density bit is set, some systems
 		 * (most notably Ultra5/Ultra10) come up with it clear.
 		 */
-		auxio_reg = edev->resource[2].start;
+		auxio_reg = (void __iomem *) edev->resource[2].start;
 		writel(readl(auxio_reg)|0x2, auxio_reg);
 
 		sun_pci_ebus_dev = ebus->self;
@@ -650,7 +649,8 @@ static unsigned long __init sun_floppy_init(void)
 		spin_lock_init(&sun_pci_fd_ebus_dma.lock);
 
 		/* XXX ioremap */
-		sun_pci_fd_ebus_dma.regs = edev->resource[1].start;
+		sun_pci_fd_ebus_dma.regs = (void __iomem *)
+			edev->resource[1].start;
 		if (!sun_pci_fd_ebus_dma.regs)
 			return 0;
 
diff --git a/include/asm-sparc64/irq.h b/include/asm-sparc64/irq.h
index 3aef0ca6775..018e2e46082 100644
--- a/include/asm-sparc64/irq.h
+++ b/include/asm-sparc64/irq.h
@@ -19,7 +19,7 @@
 /* You should not mess with this directly. That's the job of irq.c.
  *
  * If you make changes here, please update hand coded assembler of
- * SBUS/floppy interrupt handler in entry.S -DaveM
+ * the vectored interrupt trap handler in entry.S -DaveM
  *
  * This is currently one DCACHE line, two buckets per L2 cache
  * line.  Keep this in mind please.
@@ -122,11 +122,6 @@ extern void enable_irq(unsigned int);
 extern unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long imap);
 extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
 
-extern int request_fast_irq(unsigned int irq,
-			    irqreturn_t (*handler)(int, void *, struct pt_regs *),
-			    unsigned long flags, __const__ char *devname,
-			    void *dev_id);
-
 static __inline__ void set_softint(unsigned long bits)
 {
 	__asm__ __volatile__("wr	%0, 0x0, %%set_softint"
diff --git a/include/asm-sparc64/rwsem.h b/include/asm-sparc64/rwsem.h
index bf2ae90ed3d..a1cc94f9598 100644
--- a/include/asm-sparc64/rwsem.h
+++ b/include/asm-sparc64/rwsem.h
@@ -55,8 +55,9 @@ static __inline__ int rwsem_atomic_update(int delta, struct rw_semaphore *sem)
 		"add		%%g1, %1, %%g7\n\t"
 		"cas		[%2], %%g1, %%g7\n\t"
 		"cmp		%%g1, %%g7\n\t"
+		"membar		#StoreLoad | #StoreStore\n\t"
 		"bne,pn		%%icc, 1b\n\t"
-		" membar	#StoreLoad | #StoreStore\n\t"
+		" nop\n\t"
 		"mov		%%g7, %0\n\t"
 		: "=&r" (tmp)
 		: "0" (tmp), "r" (sem)
diff --git a/include/asm-sparc64/spinlock.h b/include/asm-sparc64/spinlock.h
index db7581bdb53..9cb93a5c2b4 100644
--- a/include/asm-sparc64/spinlock.h
+++ b/include/asm-sparc64/spinlock.h
@@ -52,12 +52,14 @@ static inline void _raw_spin_lock(spinlock_t *lock)
 
 	__asm__ __volatile__(
 "1:	ldstub		[%1], %0\n"
+"	membar		#StoreLoad | #StoreStore\n"
 "	brnz,pn		%0, 2f\n"
-"	 membar		#StoreLoad | #StoreStore\n"
+"	 nop\n"
 "	.subsection	2\n"
 "2:	ldub		[%1], %0\n"
+"	membar		#LoadLoad\n"
 "	brnz,pt		%0, 2b\n"
-"	 membar		#LoadLoad\n"
+"	 nop\n"
 "	ba,a,pt		%%xcc, 1b\n"
 "	.previous"
 	: "=&r" (tmp)
@@ -95,16 +97,18 @@ static inline void _raw_spin_lock_flags(spinlock_t *lock, unsigned long flags)
 
 	__asm__ __volatile__(
 "1:	ldstub		[%2], %0\n"
-"	brnz,pn		%0, 2f\n"
 "	membar		#StoreLoad | #StoreStore\n"
+"	brnz,pn		%0, 2f\n"
+"	 nop\n"
 "	.subsection	2\n"
 "2:	rdpr		%%pil, %1\n"
 "	wrpr		%3, %%pil\n"
 "3:	ldub		[%2], %0\n"
-"	brnz,pt		%0, 3b\n"
 "	membar		#LoadLoad\n"
+"	brnz,pt		%0, 3b\n"
+"	 nop\n"
 "	ba,pt		%%xcc, 1b\n"
-"	wrpr		%1, %%pil\n"
+"	 wrpr		%1, %%pil\n"
 "	.previous"
 	: "=&r" (tmp1), "=&r" (tmp2)
 	: "r"(lock), "r"(flags)
@@ -162,12 +166,14 @@ static void inline __read_lock(rwlock_t *lock)
 "4:	 add		%0, 1, %1\n"
 "	cas		[%2], %0, %1\n"
 "	cmp		%0, %1\n"
+"	membar		#StoreLoad | #StoreStore\n"
 "	bne,pn		%%icc, 1b\n"
-"	 membar		#StoreLoad | #StoreStore\n"
+"	 nop\n"
 "	.subsection	2\n"
 "2:	ldsw		[%2], %0\n"
+"	membar		#LoadLoad\n"
 "	brlz,pt		%0, 2b\n"
-"	 membar		#LoadLoad\n"
+"	 nop\n"
 "	ba,a,pt		%%xcc, 4b\n"
 "	.previous"
 	: "=&r" (tmp1), "=&r" (tmp2)
@@ -204,12 +210,14 @@ static void inline __write_lock(rwlock_t *lock)
 "4:	 or		%0, %3, %1\n"
 "	cas		[%2], %0, %1\n"
 "	cmp		%0, %1\n"
+"	membar		#StoreLoad | #StoreStore\n"
 "	bne,pn		%%icc, 1b\n"
-"	 membar		#StoreLoad | #StoreStore\n"
+"	 nop\n"
 "	.subsection	2\n"
 "2:	lduw		[%2], %0\n"
+"	membar		#LoadLoad\n"
 "	brnz,pt		%0, 2b\n"
-"	 membar		#LoadLoad\n"
+"	 nop\n"
 "	ba,a,pt		%%xcc, 4b\n"
 "	.previous"
 	: "=&r" (tmp1), "=&r" (tmp2)
@@ -240,8 +248,9 @@ static int inline __write_trylock(rwlock_t *lock)
 "	 or		%0, %4, %1\n"
 "	cas		[%3], %0, %1\n"
 "	cmp		%0, %1\n"
+"	membar		#StoreLoad | #StoreStore\n"
 "	bne,pn		%%icc, 1b\n"
-"	 membar		#StoreLoad | #StoreStore\n"
+"	 nop\n"
 "	mov		1, %2\n"
 "2:"
 	: "=&r" (tmp1), "=&r" (tmp2), "=&r" (result)
diff --git a/include/asm-sparc64/spitfire.h b/include/asm-sparc64/spitfire.h
index 9d7613eea81..1aa932773af 100644
--- a/include/asm-sparc64/spitfire.h
+++ b/include/asm-sparc64/spitfire.h
@@ -111,7 +111,6 @@ static __inline__ void spitfire_put_dcache_tag(unsigned long addr, unsigned long
 			     "membar	#Sync"
 			     : /* No outputs */
 			     : "r" (tag), "r" (addr), "i" (ASI_DCACHE_TAG));
-	__asm__ __volatile__ ("membar #Sync" : : : "memory");
 }
 
 /* The instruction cache lines are flushed with this, but note that
diff --git a/include/asm-x86_64/tlbflush.h b/include/asm-x86_64/tlbflush.h
index 2e811ac262a..06174238252 100644
--- a/include/asm-x86_64/tlbflush.h
+++ b/include/asm-x86_64/tlbflush.h
@@ -22,16 +22,18 @@
  */
 #define __flush_tlb_global()						\
 	do {								\
-		unsigned long tmpreg;					\
+		unsigned long tmpreg, cr4, cr4_orig;			\
 									\
 		__asm__ __volatile__(					\
-			"movq %1, %%cr4;  # turn off PGE     \n"	\
+			"movq %%cr4, %2;  # turn off PGE     \n"	\
+			"movq %2, %1;                        \n"	\
+			"andq %3, %1;                        \n"	\
+			"movq %1, %%cr4;                     \n"	\
 			"movq %%cr3, %0;  # flush TLB        \n"	\
 			"movq %0, %%cr3;                     \n"	\
 			"movq %2, %%cr4;  # turn PGE back on \n"	\
-			: "=&r" (tmpreg)				\
-			: "r" (mmu_cr4_features & ~X86_CR4_PGE),	\
-			  "r" (mmu_cr4_features)			\
+			: "=&r" (tmpreg), "=&r" (cr4), "=&r" (cr4_orig)	\
+			: "i" (~X86_CR4_PGE)				\
 			: "memory");					\
 	} while (0)
 
diff --git a/include/asm-x86_64/unistd.h b/include/asm-x86_64/unistd.h
index d767adcbf0f..6560439a83e 100644
--- a/include/asm-x86_64/unistd.h
+++ b/include/asm-x86_64/unistd.h
@@ -561,8 +561,12 @@ __SYSCALL(__NR_add_key, sys_add_key)
 __SYSCALL(__NR_request_key, sys_request_key)
 #define __NR_keyctl		250
 __SYSCALL(__NR_keyctl, sys_keyctl)
+#define __NR_ioprio_set		251
+__SYSCALL(__NR_ioprio_set, sys_ioprio_set)
+#define __NR_ioprio_get		252
+__SYSCALL(__NR_ioprio_get, sys_ioprio_get)
 
-#define __NR_syscall_max __NR_keyctl
+#define __NR_syscall_max __NR_ioprio_get
 #ifndef __NO_STUBS
 
 /* user-visible error numbers are in the range -1 - -4095 */
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 038022763f0..36ef29fa0d8 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -22,6 +22,7 @@
 
 #include <linux/highmem.h>
 #include <linux/mempool.h>
+#include <linux/ioprio.h>
 
 /* Platforms may set this to teach the BIO layer about IOMMU hardware. */
 #include <asm/io.h>
@@ -150,6 +151,19 @@ struct bio {
 #define BIO_RW_SYNC	4
 
 /*
+ * upper 16 bits of bi_rw define the io priority of this bio
+ */
+#define BIO_PRIO_SHIFT	(8 * sizeof(unsigned long) - IOPRIO_BITS)
+#define bio_prio(bio)	((bio)->bi_rw >> BIO_PRIO_SHIFT)
+#define bio_prio_valid(bio)	ioprio_valid(bio_prio(bio))
+
+#define bio_set_prio(bio, prio)		do {			\
+	WARN_ON(prio >= (1 << IOPRIO_BITS));			\
+	(bio)->bi_rw &= ((1UL << BIO_PRIO_SHIFT) - 1);		\
+	(bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT);	\
+} while (0)
+
+/*
  * various member access, note that bio_data should of course not be used
  * on highmem page vectors
  */
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b54a0348a89..21a8674cd14 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -54,16 +54,23 @@ struct as_io_context {
 
 struct cfq_queue;
 struct cfq_io_context {
-	void (*dtor)(struct cfq_io_context *);
-	void (*exit)(struct cfq_io_context *);
-
-	struct io_context *ioc;
-
 	/*
 	 * circular list of cfq_io_contexts belonging to a process io context
 	 */
 	struct list_head list;
 	struct cfq_queue *cfqq;
+	void *key;
+
+	struct io_context *ioc;
+
+	unsigned long last_end_request;
+	unsigned long last_queue;
+	unsigned long ttime_total;
+	unsigned long ttime_samples;
+	unsigned long ttime_mean;
+
+	void (*dtor)(struct cfq_io_context *);
+	void (*exit)(struct cfq_io_context *);
 };
 
 /*
@@ -73,7 +80,9 @@ struct cfq_io_context {
  */
 struct io_context {
 	atomic_t refcount;
-	pid_t pid;
+	struct task_struct *task;
+
+	int (*set_ioprio)(struct io_context *, unsigned int);
 
 	/*
 	 * For request batching
@@ -81,8 +90,6 @@ struct io_context {
 	unsigned long last_waited; /* Time last woken after wait for request */
 	int nr_batch_requests;     /* Number of requests left in the batch */
 
-	spinlock_t lock;
-
 	struct as_io_context *aic;
 	struct cfq_io_context *cic;
 };
@@ -134,6 +141,8 @@ struct request {
 
 	void *elevator_private;
 
+	unsigned short ioprio;
+
 	int rq_status;	/* should split this into a few status bits */
 	struct gendisk *rq_disk;
 	int errors;
diff --git a/include/linux/cciss_ioctl.h b/include/linux/cciss_ioctl.h
index ee0c6e8995d..424d5e622b4 100644
--- a/incl