20 files changed, 1218 insertions, 418 deletions

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index b41e0e199a7..ab1e49d2e51 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -25,6 +25,16 @@ obj-$(CONFIG_ARCH_S390X)	+= entry64.o reipl64.o
 
 obj-$(CONFIG_VIRT_TIMER)	+= vtime.o
 
+# Kexec part
+S390_KEXEC_OBJS := machine_kexec.o crash.o
+ifeq ($(CONFIG_ARCH_S390X),y)
+S390_KEXEC_OBJS += relocate_kernel64.o
+else
+S390_KEXEC_OBJS += relocate_kernel.o
+endif
+obj-$(CONFIG_KEXEC) += $(S390_KEXEC_OBJS)
+
+
 #
 # This is just to get the dependencies...
 #
diff --git a/arch/s390/kernel/compat_ioctl.c b/arch/s390/kernel/compat_ioctl.c
index 03d03c6d3cb..24a1e9f069a 100644
--- a/arch/s390/kernel/compat_ioctl.c
+++ b/arch/s390/kernel/compat_ioctl.c
@@ -42,7 +42,6 @@ struct ioctl_trans ioctl_start[] = {
 #include "../../../fs/compat_ioctl.c"
 
 /* s390 only ioctls */
-#if defined(CONFIG_DASD) || defined(CONFIG_DASD_MODULE)
 COMPATIBLE_IOCTL(DASDAPIVER)
 COMPATIBLE_IOCTL(BIODASDDISABLE)
 COMPATIBLE_IOCTL(BIODASDENABLE)
@@ -59,16 +58,11 @@ COMPATIBLE_IOCTL(BIODASDPRRD)
 COMPATIBLE_IOCTL(BIODASDPSRD)
 COMPATIBLE_IOCTL(BIODASDGATTR)
 COMPATIBLE_IOCTL(BIODASDSATTR)
-#if defined(CONFIG_DASD_CMB) || defined(CONFIG_DASD_CMB_MODULE)
 COMPATIBLE_IOCTL(BIODASDCMFENABLE)
 COMPATIBLE_IOCTL(BIODASDCMFDISABLE)
 COMPATIBLE_IOCTL(BIODASDREADALLCMB)
-#endif
-#endif
 
-#if defined(CONFIG_S390_TAPE) || defined(CONFIG_S390_TAPE_MODULE)
 COMPATIBLE_IOCTL(TAPE390_DISPLAY)
-#endif
 
 /* s390 doesn't need handlers here */
 COMPATIBLE_IOCTL(TIOCGSERIAL)
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index bf33dcfec7d..3898f66d0b2 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -45,7 +45,7 @@ typedef struct compat_siginfo {
 
 		/* POSIX.1b timers */
 		struct {
-			timer_t _tid;		/* timer id */
+			compat_timer_t _tid;		/* timer id */
 			int _overrun;		/* overrun count */
 			compat_sigval_t _sigval;	/* same as below */
 			int _sys_private;       /* not to be passed to user */
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 7a607b1d038..bf529739c8a 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1441,3 +1441,11 @@ compat_sys_waitid_wrapper:
 	lgfr	%r5,%r5			# int
 	llgtr	%r6,%r6			# struct rusage_emu31 *
 	jg	compat_sys_waitid
+
+	.globl	compat_sys_kexec_load_wrapper
+compat_sys_kexec_load_wrapper:
+	llgfr	%r2,%r2			# unsigned long
+	llgfr	%r3,%r3			# unsigned long
+	llgtr	%r4,%r4			# struct kexec_segment *
+	llgfr	%r5,%r5			# unsigned long
+	jg	compat_sys_kexec_load
diff --git a/arch/s390/kernel/cpcmd.c b/arch/s390/kernel/cpcmd.c
index 44df8dc07c5..20062145e84 100644
--- a/arch/s390/kernel/cpcmd.c
+++ b/arch/s390/kernel/cpcmd.c
@@ -2,7 +2,7 @@
  *  arch/s390/kernel/cpcmd.c
  *
  *  S390 version
- *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Copyright (C) 1999,2005 IBM Deutschland Entwicklung GmbH, IBM Corporation
  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
  *               Christian Borntraeger (cborntra@de.ibm.com),
  */
@@ -18,93 +18,114 @@
 #include <asm/system.h>
 
 static DEFINE_SPINLOCK(cpcmd_lock);
-static char cpcmd_buf[240];
+static char cpcmd_buf[241];
 
 /*
  * the caller of __cpcmd has to ensure that the response buffer is below 2 GB
  */
-void __cpcmd(char *cmd, char *response, int rlen)
+int  __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
 {
 	const int mask = 0x40000000L;
 	unsigned long flags;
+	int return_code;
+	int return_len;
 	int cmdlen;
 
 	spin_lock_irqsave(&cpcmd_lock, flags);
 	cmdlen = strlen(cmd);
 	BUG_ON(cmdlen > 240);
-	strcpy(cpcmd_buf, cmd);
+	memcpy(cpcmd_buf, cmd, cmdlen);
 	ASCEBC(cpcmd_buf, cmdlen);
 
 	if (response != NULL && rlen > 0) {
 		memset(response, 0, rlen);
 #ifndef CONFIG_ARCH_S390X
-		asm volatile ("LRA   2,0(%0)\n\t"
-                              "LR    4,%1\n\t"
-                              "O     4,%4\n\t"
-                              "LRA   3,0(%2)\n\t"
-                              "LR    5,%3\n\t"
-                              ".long 0x83240008 # Diagnose X'08'\n\t"
-                              : /* no output */
-                              : "a" (cpcmd_buf), "d" (cmdlen),
-                                "a" (response), "d" (rlen), "m" (mask)
-                              : "cc", "2", "3", "4", "5" );
+		asm volatile (	"lra	2,0(%2)\n"
+				"lr	4,%3\n"
+				"o	4,%6\n"
+				"lra	3,0(%4)\n"
+				"lr	5,%5\n"
+				"diag	2,4,0x8\n"
+				"brc	8, .Litfits\n"
+				"ar	5, %5\n"
+				".Litfits: \n"
+				"lr	%0,4\n"
+				"lr	%1,5\n"
+				: "=d" (return_code), "=d" (return_len)
+				: "a" (cpcmd_buf), "d" (cmdlen),
+				"a" (response), "d" (rlen), "m" (mask)
+				: "cc", "2", "3", "4", "5" );
 #else /* CONFIG_ARCH_S390X */
-                asm volatile ("   lrag  2,0(%0)\n"
-                              "   lgr   4,%1\n"
-                              "   o     4,%4\n"
-                              "   lrag  3,0(%2)\n"
-                              "   lgr   5,%3\n"
-                              "   sam31\n"
-                              "   .long 0x83240008 # Diagnose X'08'\n"
-                              "   sam64"
-                              : /* no output */
-                              : "a" (cpcmd_buf), "d" (cmdlen),
-                                "a" (response), "d" (rlen), "m" (mask)
-                              : "cc", "2", "3", "4", "5" );
+                asm volatile (	"lrag	2,0(%2)\n"
+				"lgr	4,%3\n"
+				"o	4,%6\n"
+				"lrag	3,0(%4)\n"
+				"lgr	5,%5\n"
+				"sam31\n"
+				"diag	2,4,0x8\n"
+				"sam64\n"
+				"brc	8, .Litfits\n"
+				"agr	5, %5\n"
+				".Litfits: \n"
+				"lgr	%0,4\n"
+				"lgr	%1,5\n"
+				: "=d" (return_code), "=d" (return_len)
+				: "a" (cpcmd_buf), "d" (cmdlen),
+				"a" (response), "d" (rlen), "m" (mask)
+				: "cc", "2", "3", "4", "5" );
 #endif /* CONFIG_ARCH_S390X */
                 EBCASC(response, rlen);
         } else {
+		return_len = 0;
 #ifndef CONFIG_ARCH_S390X
-                asm volatile ("LRA   2,0(%0)\n\t"
-                              "LR    3,%1\n\t"
-                              ".long 0x83230008 # Diagnose X'08'\n\t"
-                              : /* no output */
-                              : "a" (cpcmd_buf), "d" (cmdlen)
-                              : "2", "3"  );
+                asm volatile (	"lra	2,0(%1)\n"
+				"lr	3,%2\n"
+				"diag	2,3,0x8\n"
+				"lr	%0,3\n"
+				: "=d" (return_code)
+				: "a" (cpcmd_buf), "d" (cmdlen)
+				: "2", "3"  );
 #else /* CONFIG_ARCH_S390X */
-                asm volatile ("   lrag  2,0(%0)\n"
-                              "   lgr   3,%1\n"
-                              "   sam31\n"
-                              "   .long 0x83230008 # Diagnose X'08'\n"
-                              "   sam64"
-                              : /* no output */
-                              : "a" (cpcmd_buf), "d" (cmdlen)
-                              : "2", "3"  );
+                asm volatile (	"lrag	2,0(%1)\n"
+				"lgr	3,%2\n"
+				"sam31\n"
+				"diag	2,3,0x8\n"
+				"sam64\n"
+				"lgr	%0,3\n"
+				: "=d" (return_code)
+				: "a" (cpcmd_buf), "d" (cmdlen)
+				: "2", "3" );
 #endif /* CONFIG_ARCH_S390X */
         }
 	spin_unlock_irqrestore(&cpcmd_lock, flags);
+	if (response_code != NULL)
+		*response_code = return_code;
+	return return_len;
 }
 
 EXPORT_SYMBOL(__cpcmd);
 
 #ifdef CONFIG_ARCH_S390X
-void cpcmd(char *cmd, char *response, int rlen)
+int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
 {
 	char *lowbuf;
+	int len;
+
 	if ((rlen == 0) || (response == NULL)
 	    || !((unsigned long)response >> 31))
-		__cpcmd(cmd, response, rlen);
+		len = __cpcmd(cmd, response, rlen, response_code);
 	else {
 		lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA);
 		if (!lowbuf) {
 			printk(KERN_WARNING
 				"cpcmd: could not allocate response buffer\n");
-			return;
+			return -ENOMEM;
 		}
-		__cpcmd(cmd, lowbuf, rlen);
+		len = __cpcmd(cmd, lowbuf, rlen, response_code);
 		memcpy(response, lowbuf, rlen);
 		kfree(lowbuf);
 	}
+	return len;
 }
 
 EXPORT_SYMBOL(cpcmd);
diff --git a/arch/s390/kernel/crash.c b/arch/s390/kernel/crash.c
new file mode 100644
index 00000000000..7bd169c58b0
--- /dev/null
+++ b/arch/s390/kernel/crash.c
@@ -0,0 +1,17 @@
+/*
+ * arch/s390/kernel/crash.c
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ *
+ */
+
+#include <linux/threads.h>
+#include <linux/kexec.h>
+
+note_buf_t crash_notes[NR_CPUS];
+
+void machine_crash_shutdown(struct pt_regs *regs)
+{
+}
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 91f8ce5543d..960ba6029c3 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -19,22 +19,27 @@
 #include <linux/sysctl.h>
 #include <asm/uaccess.h>
 #include <asm/semaphore.h>
-
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/debugfs.h>
 
 #include <asm/debug.h>
 
 #define DEBUG_PROLOG_ENTRY -1
 
+#define ALL_AREAS 0 /* copy all debug areas */
+#define NO_AREAS  1 /* copy no debug areas */
+
 /* typedefs */
 
 typedef struct file_private_info {
 	loff_t offset;			/* offset of last read in file */
 	int    act_area;                /* number of last formated area */
+	int    act_page;                /* act page in given area */
 	int    act_entry;               /* last formated entry (offset */
                                         /* relative to beginning of last */
-                                        /* formated area) */ 
+                                        /* formated page) */
 	size_t act_entry_offset;        /* up to this offset we copied */
 					/* in last read the last formated */
 					/* entry to userland */
@@ -51,8 +56,8 @@ typedef struct
 	 * This assumes that all args are converted into longs 
 	 * on L/390 this is the case for all types of parameter 
 	 * except of floats, and long long (32 bit) 
-         *
-         */
+	 *
+	 */
 	long args[0];
 } debug_sprintf_entry_t;
 
@@ -63,32 +68,38 @@ extern void tod_to_timeval(uint64_t todval, struct timeval *xtime);
 
 static int debug_init(void);
 static ssize_t debug_output(struct file *file, char __user *user_buf,
-			    size_t user_len, loff_t * offset);
+			size_t user_len, loff_t * offset);
 static ssize_t debug_input(struct file *file, const char __user *user_buf,
-			   size_t user_len, loff_t * offset);
+			size_t user_len, loff_t * offset);
 static int debug_open(struct inode *inode, struct file *file);
 static int debug_close(struct inode *inode, struct file *file);
-static debug_info_t*  debug_info_create(char *name, int page_order, int nr_areas, int buf_size);
+static debug_info_t*  debug_info_create(char *name, int pages_per_area,
+			int nr_areas, int buf_size);
 static void debug_info_get(debug_info_t *);
 static void debug_info_put(debug_info_t *);
 static int debug_prolog_level_fn(debug_info_t * id,
-				 struct debug_view *view, char *out_buf);
+			struct debug_view *view, char *out_buf);
 static int debug_input_level_fn(debug_info_t * id, struct debug_view *view,
-				struct file *file, const char __user *user_buf,
-				size_t user_buf_size, loff_t * offset);
+			struct file *file, const char __user *user_buf,
+			size_t user_buf_size, loff_t * offset);
+static int debug_prolog_pages_fn(debug_info_t * id,
+			struct debug_view *view, char *out_buf);
+static int debug_input_pages_fn(debug_info_t * id, struct debug_view *view,
+			struct file *file, const char __user *user_buf,
+			size_t user_buf_size, loff_t * offset);
 static int debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
-                                struct file *file, const char __user *user_buf,
-                                size_t user_buf_size, loff_t * offset);
+			struct file *file, const char __user *user_buf,
+			size_t user_buf_size, loff_t * offset);
 static int debug_hex_ascii_format_fn(debug_info_t * id, struct debug_view *view,
-                                char *out_buf, const char *in_buf);
+			char *out_buf, const char *in_buf);
 static int debug_raw_format_fn(debug_info_t * id,
-				 struct debug_view *view, char *out_buf,
-				 const char *in_buf);
+			struct debug_view *view, char *out_buf,
+			const char *in_buf);
 static int debug_raw_header_fn(debug_info_t * id, struct debug_view *view,
-                         int area, debug_entry_t * entry, char *out_buf);
+			int area, debug_entry_t * entry, char *out_buf);
 
 static int debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
-				   char *out_buf, debug_sprintf_entry_t *curr_event);
+			char *out_buf, debug_sprintf_entry_t *curr_event);
 
 /* globals */
 
@@ -119,6 +130,15 @@ struct debug_view debug_level_view = {
 	NULL
 };
 
+struct debug_view debug_pages_view = {
+	"pages",
+	&debug_prolog_pages_fn,
+	NULL,
+	NULL,
+	&debug_input_pages_fn,
+	NULL
+};
+
 struct debug_view debug_flush_view = {
         "flush",
         NULL,
@@ -149,98 +169,161 @@ DECLARE_MUTEX(debug_lock);
 static int initialized;
 
 static struct file_operations debug_file_ops = {
-	.owner	 = THIS_MODULE,
+	.owner   = THIS_MODULE,
 	.read    = debug_output,
-	.write   = debug_input,	
+	.write   = debug_input,
 	.open    = debug_open,
 	.release = debug_close,
 };
 
-static struct proc_dir_entry *debug_proc_root_entry;
+static struct dentry *debug_debugfs_root_entry;
 
 /* functions */
 
 /*
+ * debug_areas_alloc
+ * - Debug areas are implemented as a threedimensonal array:
+ *   areas[areanumber][pagenumber][pageoffset]
+ */
+
+static debug_entry_t***
+debug_areas_alloc(int pages_per_area, int nr_areas)
+{
+	debug_entry_t*** areas;
+	int i,j;
+
+	areas = (debug_entry_t ***) kmalloc(nr_areas *
+					sizeof(debug_entry_t**),
+					GFP_KERNEL);
+	if (!areas)
+		goto fail_malloc_areas;
+	for (i = 0; i < nr_areas; i++) {
+		areas[i] = (debug_entry_t**) kmalloc(pages_per_area *
+				sizeof(debug_entry_t*),GFP_KERNEL);
+		if (!areas[i]) {
+			goto fail_malloc_areas2;
+		}
+		for(j = 0; j < pages_per_area; j++) {
+			areas[i][j] = (debug_entry_t*)kmalloc(PAGE_SIZE,
+						GFP_KERNEL);
+			if(!areas[i][j]) {
+				for(j--; j >=0 ; j--) {
+					kfree(areas[i][j]);
+				}
+				kfree(areas[i]);
+				goto fail_malloc_areas2;
+			} else {
+				memset(areas[i][j],0,PAGE_SIZE);
+			}
+		}
+	}
+	return areas;
+
+fail_malloc_areas2:
+	for(i--; i >= 0; i--){
+		for(j=0; j < pages_per_area;j++){
+			kfree(areas[i][j]);
+		}
+		kfree(areas[i]);
+	}
+	kfree(areas);
+fail_malloc_areas:
+	return NULL;
+
+}
+
+
+/*
  * debug_info_alloc
  * - alloc new debug-info
  */
 
-static debug_info_t*  debug_info_alloc(char *name, int page_order,
-                                        int nr_areas, int buf_size)
+static debug_info_t*
+debug_info_alloc(char *name, int pages_per_area, int nr_areas, int buf_size,
+		int level, int mode)
 {
 	debug_info_t* rc;
-	int i;
 
 	/* alloc everything */
 
-	rc = (debug_info_t*) kmalloc(sizeof(debug_info_t), GFP_ATOMIC);
+	rc = (debug_info_t*) kmalloc(sizeof(debug_info_t), GFP_KERNEL);
 	if(!rc)
 		goto fail_malloc_rc;
-	rc->active_entry = (int*)kmalloc(nr_areas * sizeof(int), GFP_ATOMIC);
-	if(!rc->active_entry)
-		goto fail_malloc_active_entry;
-	memset(rc->active_entry, 0, nr_areas * sizeof(int));
-	rc->areas = (debug_entry_t **) kmalloc(nr_areas *
-						sizeof(debug_entry_t *),
-						GFP_ATOMIC);
-	if (!rc->areas)
-		goto fail_malloc_areas;
-	for (i = 0; i < nr_areas; i++) {
-		rc->areas[i] = (debug_entry_t *) __get_free_pages(GFP_ATOMIC,
-								page_order);
-		if (!rc->areas[i]) {
-			for (i--; i >= 0; i--) {
-				free_pages((unsigned long) rc->areas[i],
-						page_order);
-			}
-			goto fail_malloc_areas2;
-		} else {
-			memset(rc->areas[i], 0, PAGE_SIZE << page_order);
-		}
+	rc->active_entries = (int*)kmalloc(nr_areas * sizeof(int), GFP_KERNEL);
+	if(!rc->active_entries)
+		goto fail_malloc_active_entries;
+	memset(rc->active_entries, 0, nr_areas * sizeof(int));
+	rc->active_pages = (int*)kmalloc(nr_areas * sizeof(int), GFP_KERNEL);
+	if(!rc->active_pages)
+		goto fail_malloc_active_pages;
+	memset(rc->active_pages, 0, nr_areas * sizeof(int));
+	if((mode == ALL_AREAS) && (pages_per_area != 0)){
+		rc->areas = debug_areas_alloc(pages_per_area, nr_areas);
+		if(!rc->areas)
+			goto fail_malloc_areas;
+	} else {
+		rc->areas = NULL;
 	}
 
 	/* initialize members */
 
 	spin_lock_init(&rc->lock);
-	rc->page_order  = page_order;
-	rc->nr_areas    = nr_areas;
-	rc->active_area = 0;
-	rc->level       = DEBUG_DEFAULT_LEVEL;
-	rc->buf_size    = buf_size;
-	rc->entry_size  = sizeof(debug_entry_t) + buf_size;
-	strlcpy(rc->name, name, sizeof(rc->name));
+	rc->pages_per_area = pages_per_area;
+	rc->nr_areas       = nr_areas;
+	rc->active_area    = 0;
+	rc->level          = level;
+	rc->buf_size       = buf_size;
+	rc->entry_size     = sizeof(debug_entry_t) + buf_size;
+	strlcpy(rc->name, name, sizeof(rc->name)-1);
 	memset(rc->views, 0, DEBUG_MAX_VIEWS * sizeof(struct debug_view *));
-#ifdef CONFIG_PROC_FS
-	memset(rc->proc_entries, 0 ,DEBUG_MAX_VIEWS *
-		sizeof(struct proc_dir_entry*));
-#endif /* CONFIG_PROC_FS */
+	memset(rc->debugfs_entries, 0 ,DEBUG_MAX_VIEWS *
+		sizeof(struct dentry*));
 	atomic_set(&(rc->ref_count), 0);
 
 	return rc;
 
-fail_malloc_areas2:
-	kfree(rc->areas);
 fail_malloc_areas:
-	kfree(rc->active_entry);
-fail_malloc_active_entry:
+	kfree(rc->active_pages);
+fail_malloc_active_pages:
+	kfree(rc->active_entries);
+fail_malloc_active_entries:
 	kfree(rc);
 fail_malloc_rc:
 	return NULL;
 }
 
 /*
- * debug_info_free
- * - free memory debug-info
+ * debug_areas_free
+ * - free all debug areas
  */
 
-static void debug_info_free(debug_info_t* db_info){
-	int i;
+static void
+debug_areas_free(debug_info_t* db_info)
+{
+	int i,j;
+
+	if(!db_info->areas)
+		return;
 	for (i = 0; i < db_info->nr_areas; i++) {
-		free_pages((unsigned long) db_info->areas[i],
-		db_info->page_order);
+		for(j = 0; j < db_info->pages_per_area; j++) {
+			kfree(db_info->areas[i][j]);
+		}
+		kfree(db_info->areas[i]);
 	}
 	kfree(db_info->areas);
-	kfree(db_info->active_entry);
+	db_info->areas = NULL;
+}
+
+/*
+ * debug_info_free
+ * - free memory debug-info
+ */
+
+static void
+debug_info_free(debug_info_t* db_info){
+	debug_areas_free(db_info);
+	kfree(db_info->active_entries);
+	kfree(db_info->active_pages);
 	kfree(db_info);
 }
 
@@ -249,21 +332,22 @@ static void debug_info_free(debug_info_t* db_info){
  * - create new debug-info
  */
 
-static debug_info_t*  debug_info_create(char *name, int page_order, 
-                                        int nr_areas, int buf_size)
+static debug_info_t*
+debug_info_create(char *name, int pages_per_area, int nr_areas, int buf_size)
 {
 	debug_info_t* rc;
 
-        rc = debug_info_alloc(name, page_order, nr_areas, buf_size);
+        rc = debug_info_alloc(name, pages_per_area, nr_areas, buf_size,
+				DEBUG_DEFAULT_LEVEL, ALL_AREAS);
         if(!rc) 
 		goto out;
 
-
-	/* create proc rood directory */
-        rc->proc_root_entry = proc_mkdir(rc->name, debug_proc_root_entry);
+	/* create root directory */
+        rc->debugfs_root_entry = debugfs_create_dir(rc->name,
+					debug_debugfs_root_entry);
 
 	/* append new element to linked list */
-        if (debug_area_first == NULL) {
+        if (!debug_area_first) {
                 /* first element in list */
                 debug_area_first = rc;
                 rc->prev = NULL;
@@ -285,17 +369,21 @@ out:
  * - copy debug-info
  */
 
-static debug_info_t* debug_info_copy(debug_info_t* in)
+static debug_info_t*
+debug_info_copy(debug_info_t* in, int mode)
 {
-        int i;
+        int i,j;
         debug_info_t* rc;
-        rc = debug_info_alloc(in->name, in->page_order, 
-                                in->nr_areas, in->buf_size);
-        if(!rc)
+
+        rc = debug_info_alloc(in->name, in->pages_per_area, in->nr_areas,
+				in->buf_size, in->level, mode);
+        if(!rc || (mode == NO_AREAS))
                 goto out;
 
         for(i = 0; i < in->nr_areas; i++){
-                memcpy(rc->areas[i],in->areas[i], PAGE_SIZE << in->page_order);
+		for(j = 0; j < in->pages_per_area; j++) {
+			memcpy(rc->areas[i][j], in->areas[i][j],PAGE_SIZE);
+		}
         }
 out:
         return rc;
@@ -306,7 +394,8 @@ out:
  * - increments reference count for debug-info
  */
 
-static void debug_info_get(debug_info_t * db_info)
+static void
+debug_info_get(debug_info_t * db_info)
 {
 	if (db_info)
 		atomic_inc(&db_info->ref_count);
@@ -317,29 +406,20 @@ static void debug_info_get(debug_info_t * db_info)
  * - decreases reference count for debug-info and frees it if necessary
  */
 
-static void debug_info_put(debug_info_t *db_info)
+static void
+debug_info_put(debug_info_t *db_info)
 {
 	int i;
 
 	if (!db_info)
 		return;
 	if (atomic_dec_and_test(&db_info->ref_count)) {
-#ifdef DEBUG
-		printk(KERN_INFO "debug: freeing debug area %p (%s)\n",
-		       db_info, db_info->name);
-#endif
 		for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
-			if (db_info->views[i] == NULL)
+			if (!db_info->views[i])
 				continue;
-#ifdef CONFIG_PROC_FS
-			remove_proc_entry(db_info->proc_entries[i]->name,
-					  db_info->proc_root_entry);
-#endif
+			debugfs_remove(db_info->debugfs_entries[i]);
 		}
-#ifdef CONFIG_PROC_FS
-		remove_proc_entry(db_info->proc_root_entry->name,
-				  debug_proc_root_entry);
-#endif
+		debugfs_remove(db_info->debugfs_root_entry);
 		if(db_info == debug_area_first)
 			debug_area_first = db_info->next;
 		if(db_info == debug_area_last)
@@ -355,9 +435,9 @@ static void debug_info_put(debug_info_t *db_info)
  * - format one debug entry and return size of formated data
  */
 
-static int debug_format_entry(file_private_info_t *p_info)
+static int
+debug_format_entry(file_private_info_t *p_info)
 {
-	debug_info_t *id_org    = p_info->debug_info_org;
 	debug_info_t *id_snap   = p_info->debug_info_snap;
 	struct debug_view *view = p_info->view;
 	debug_entry_t *act_entry;
@@ -365,22 +445,23 @@ static int debug_format_entry(file_private_info_t *p_info)
 	if(p_info->act_entry == DEBUG_PROLOG_ENTRY){
 		/* print prolog */
         	if (view->prolog_proc)
-                	len += view->prolog_proc(id_org, view,p_info->temp_buf);
+                	len += view->prolog_proc(id_snap,view,p_info->temp_buf);
 		goto out;
 	}
-
-	act_entry = (debug_entry_t *) ((char*)id_snap->areas[p_info->act_area] +
-					p_info->act_entry);
+	if (!id_snap->areas) /* this is true, if we have a prolog only view */
+		goto out;    /* or if 'pages_per_area' is 0 */
+	act_entry = (debug_entry_t *) ((char*)id_snap->areas[p_info->act_area]
+				[p_info->act_page] + p_info->act_entry);
                         
 	if (act_entry->id.stck == 0LL)
 			goto out;  /* empty entry */
 	if (view->header_proc)
-		len += view->header_proc(id_org, view, p_info->act_area, 
+		len += view->header_proc(id_snap, view, p_info->act_area,
 					act_entry, p_info->temp_buf + len);
 	if (view->format_proc)
-		len += view->format_proc(id_org, view, p_info->temp_buf + len,
+		len += view->format_proc(id_snap, view, p_info->temp_buf + len,
 						DEBUG_DATA(act_entry));
-      out:
+out:
         return len;
 }
 
@@ -389,20 +470,30 @@ static int debug_format_entry(file_private_info_t *p_info)
  * - goto next entry in p_info
  */
 
-extern inline int debug_next_entry(file_private_info_t *p_info)
+extern inline int
+debug_next_entry(file_private_info_t *p_info)
 {
-	debug_info_t *id = p_info->debug_info_snap;
+	debug_info_t *id;
+
+	id = p_info->debug_info_snap;
 	if(p_info->act_entry == DEBUG_PROLOG_ENTRY){
 		p_info->act_entry = 0;
+		p_info->act_page  = 0;
 		goto out;
 	}
-	if ((p_info->act_entry += id->entry_size)
-		> ((PAGE_SIZE << (id->page_order)) 
-		- id->entry_size)){
-
-		/* next area */
+	if(!id->areas)
+		return 1;
+	p_info->act_entry += id->entry_size;
+	/* switch to next page, if we reached the end of the page  */
+	if (p_info->act_entry > (PAGE_SIZE - id->entry_size)){
+		/* next page */
 		p_info->act_entry = 0;
-        	p_info->act_area++;
+		p_info->act_page += 1;
+		if((p_info->act_page % id->pages_per_area) == 0) {
+			/* next area */
+        		p_info->act_area++;
+			p_info->act_page=0;
+		}
         	if(p_info->act_area >= id->nr_areas)
 			return 1;
 	}
@@ -416,13 +507,14 @@ out:
  * - copies formated debug entries to the user buffer
  */
 
-static ssize_t debug_output(struct file *file,		/* file descriptor */
-			    char __user *user_buf,	/* user buffer */
-			    size_t  len,		/* length of buffer */
-			    loff_t *offset)	      /* offset in the file */
+static ssize_t
+debug_output(struct file *file,		/* file descriptor */
+	    char __user *user_buf,	/* user buffer */
+	    size_t  len,		/* length of buffer */
+	    loff_t *offset)		/* offset in the file */
 {
 	size_t count = 0;
-	size_t entry_offset, size = 0;
+	size_t entry_offset;
 	file_private_info_t *p_info;
 
 	p_info = ((file_private_info_t *) file->private_data);
@@ -430,27 +522,33 @@ static ssize_t debug_output(struct file *file,		/* file descriptor */
 		return -EPIPE;
 	if(p_info->act_area >= p_info->debug_info_snap->nr_areas)
 		return 0;
-
 	entry_offset = p_info->act_entry_offset;
-
 	while(count < len){
-		size = debug_format_entry(p_info);
-		size = min((len - count), (size - entry_offset));
-
-		if(size){
-			if (copy_to_user(user_buf + count, 
-					p_info->temp_buf + entry_offset, size))
-			return -EFAULT;
+		int formatted_line_size;
+		int formatted_line_residue;
+		int user_buf_residue;
+		size_t copy_size;
+
+		formatted_line_size = debug_format_entry(p_info);
+		formatted_line_residue = formatted_line_size - entry_offset;
+		user_buf_residue = len-count;
+		copy_size = min(user_buf_residue, formatted_line_residue);
+		if(copy_size){
+			if (copy_to_user(user_buf + count, p_info->temp_buf
+					+ entry_offset, copy_size))
+				return -EFAULT;
+			count += copy_size;
+			entry_offset += copy_size;
 		}
-		count += size;
-		entry_offset = 0;
-		if(count != len)
-			if(debug_next_entry(p_info)) 
+		if(copy_size == formatted_line_residue){
+			entry_offset = 0;
+			if(debug_next_entry(p_info))
 				goto out;
+		}
 	}
 out:
 	p_info->offset           = *offset + count;
-	p_info->act_entry_offset = size;	
+	p_info->act_entry_offset = entry_offset;
 	*offset = p_info->offset;
 	return count;
 }
@@ -461,9 +559,9 @@ out:
  * - calls input function of view
  */
 
-static ssize_t debug_input(struct file *file,
-			   const char __user *user_buf, size_t length,
-			   loff_t *offset)
+static ssize_t
+debug_input(struct file *file, const char __user *user_buf, size_t length,
+		loff_t *offset)
 {
 	int rc = 0;
 	file_private_info_t *p_info;
@@ -487,26 +585,23 @@ static ssize_t debug_input(struct file *file,
  *   handle
  */
 
-static int debug_open(struct inode *inode, struct file *file)
+static int
+debug_open(struct inode *inode, struct file *file)
 {
 	int i = 0, rc = 0;
 	file_private_info_t *p_info;
 	debug_info_t *debug_info, *debug_info_snapshot;
 
-#ifdef DEBUG
-	printk("debug_open\n");
-#endif
 	down(&debug_lock);
 
 	/* find debug log and view */
-
 	debug_info = debug_area_first;
 	while(debug_info != NULL){
 		for (i = 0; i < DEBUG_MAX_VIEWS; i++) {
-			if (debug_info->views[i] == NULL)
+			if (!debug_info->views[i])
 				continue;
-			else if (debug_info->proc_entries[i] ==
-				 PDE(file->f_dentry->d_inode)) {
+			else if (debug_info->debugfs_entries[i] ==
+				 file->f_dentry) {
 				goto found;	/* found view ! */
 			}
 		}
@@ -516,41 +611,42 @@ static int debug_open(struct inode *inode, struct file *file)
 	rc = -EINVAL;
 	goto out;
 
-      found:
+found:
 
-	/* make snapshot of current debug areas to get it consistent */
+	/* Make snapshot of current debug areas to get it consistent.     */
+	/* To copy all the areas is only needed, if we have a view which  */
+	/* formats the debug areas. */
 
-	debug_info_snapshot = debug_info_copy(debug_info);
+	if(!debug_info->views[i]->format_proc &&
+		!debug_info->views[i]->header_proc){
+		debug_info_snapshot = debug_info_copy(debug_info, NO_AREAS);
+	} else {
+		debug_info_snapshot = debug_info_copy(debug_info, ALL_AREAS);
+	}
 
 	if(!debug_info_snapshot){
-#ifdef DEBUG
-		printk(KERN_ERR "debug_open: debug_info_copy failed (out of mem)\n");
-#endif
 		rc = -ENOMEM;
 		goto out;
 	}
-
-	if ((file->private_data =
-	     kmalloc(sizeof(file_private_info_t), GFP_ATOMIC)) == 0) {
-#ifdef DEBUG
-		printk(KERN_ERR "debug_open: kmalloc failed\n");
-#endif
-		debug_info_free(debug_info_snapshot);	
+	p_info = (file_private_info_t *) kmalloc(sizeof(file_private_info_t),
+						GFP_KERNEL);
+	if(!p_info){
+		if(debug_info_snapshot)
+			debug_info_free(debug_info_snapshot);
 		rc = -ENOMEM;
 		goto out;
 	}
-	p_info = (file_private_info_t *) file->private_data;
 	p_info->offset = 0;
 	p_info->debug_info_snap = debug_info_snapshot;
 	p_info->debug_info_org  = debug_info;
 	p_info->view = debug_info->views[i];
 	p_info->act_area = 0;
+	p_info->act_page = 0;
 	p_info->act_entry = DEBUG_PROLOG_ENTRY;
 	p_info->act_entry_offset = 0;
-
+	file->private_data = p_info;
 	debug_info_get(debug_info);
-
-      out:
+out:
 	up(&debug_lock);
 	return rc;
 }
@@ -561,14 +657,13 @@ static int debug_open(struct inode *inode, struct file *file)