Merge branch 'akpm' (updates from Andrew Morton)

Merge first patch-bomb from Andrew Morton:
 - various misc bits
 - I'm been patchmonkeying ocfs2 for a while, as Joel and Mark have been
   distracted.  There has been quite a bit of activity.
 - About half the MM queue
 - Some backlight bits
 - Various lib/ updates
 - checkpatch updates
 - zillions more little rtc patches
 - ptrace
 - signals
 - exec
 - procfs
 - rapidio
 - nbd
 - aoe
 - pps
 - memstick
 - tools/testing/selftests updates

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (445 commits)
  tools/testing/selftests: don't assume the x bit is set on scripts
  selftests: add .gitignore for kcmp
  selftests: fix clean target in kcmp Makefile
  selftests: add .gitignore for vm
  selftests: add hugetlbfstest
  self-test: fix make clean
  selftests: exit 1 on failure
  kernel/resource.c: remove the unneeded assignment in function __find_resource
  aio: fix wrong comment in aio_complete()
  drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode
  drivers/memstick/host/r592.c: convert to module_pci_driver
  drivers/memstick/host/jmb38x_ms: convert to module_pci_driver
  pps-gpio: add device-tree binding and support
  drivers/pps/clients/pps-gpio.c: convert to module_platform_driver
  drivers/pps/clients/pps-gpio.c: convert to devm_* helpers
  drivers/parport/share.c: use kzalloc
  Documentation/accounting/getdelays.c: avoid strncpy in accounting tool
  aoe: update internal version number to v83
  aoe: update copyright date
  aoe: perform I/O completions in parallel
  ...

43 files changed, 991 insertions, 470 deletions

diff --git a/fs/aio.c b/fs/aio.c
index a8ecc8313fb..9b5ca113741 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -625,7 +625,7 @@ void aio_complete(struct kiocb *iocb, long res, long res2)
 
 	/*
 	 * Add a completion event to the ring buffer. Must be done holding
-	 * ctx->ctx_lock to prevent other code from messing with the tail
+	 * ctx->completion_lock to prevent other code from messing with the tail
 	 * pointer since we might be called from irq context.
 	 */
 	spin_lock_irqsave(&ctx->completion_lock, flags);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 431b6a04ebf..bb43ce081d6 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1562,6 +1562,7 @@ static const struct address_space_operations def_blk_aops = {
 	.writepages	= generic_writepages,
 	.releasepage	= blkdev_releasepage,
 	.direct_IO	= blkdev_direct_IO,
+	.is_dirty_writeback = buffer_check_dirty_writeback,
 };
 
 const struct file_operations def_blk_fops = {
diff --git a/fs/buffer.c b/fs/buffer.c
index f93392e2df1..4d7433534f5 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -83,6 +83,40 @@ void unlock_buffer(struct buffer_head *bh)
 EXPORT_SYMBOL(unlock_buffer);
 
 /*
+ * Returns if the page has dirty or writeback buffers. If all the buffers
+ * are unlocked and clean then the PageDirty information is stale. If
+ * any of the pages are locked, it is assumed they are locked for IO.
+ */
+void buffer_check_dirty_writeback(struct page *page,
+				     bool *dirty, bool *writeback)
+{
+	struct buffer_head *head, *bh;
+	*dirty = false;
+	*writeback = false;
+
+	BUG_ON(!PageLocked(page));
+
+	if (!page_has_buffers(page))
+		return;
+
+	if (PageWriteback(page))
+		*writeback = true;
+
+	head = page_buffers(page);
+	bh = head;
+	do {
+		if (buffer_locked(bh))
+			*writeback = true;
+
+		if (buffer_dirty(bh))
+			*dirty = true;
+
+		bh = bh->b_this_page;
+	} while (bh != head);
+}
+EXPORT_SYMBOL(buffer_check_dirty_writeback);
+
+/*
  * Block until a buffer comes unlocked.  This doesn't stop it
  * from becoming locked again - you have to lock it yourself
  * if you want to preserve its state.
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 317f9ee9c99..ebaff368120 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -12,6 +12,7 @@
 #include <linux/mount.h>
 #include <linux/slab.h>
 #include <linux/file.h>
+#include <linux/swap.h>
 #include "internal.h"
 
 /*
@@ -227,8 +228,7 @@ static void cachefiles_read_copier(struct fscache_operation *_op)
  */
 static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
 					    struct fscache_retrieval *op,
-					    struct page *netpage,
-					    struct pagevec *pagevec)
+					    struct page *netpage)
 {
 	struct cachefiles_one_read *monitor;
 	struct address_space *bmapping;
@@ -237,8 +237,6 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
 
 	_enter("");
 
-	pagevec_reinit(pagevec);
-
 	_debug("read back %p{%lu,%d}",
 	       netpage, netpage->index, page_count(netpage));
 
@@ -283,9 +281,7 @@ installed_new_backing_page:
 	backpage = newpage;
 	newpage = NULL;
 
-	page_cache_get(backpage);
-	pagevec_add(pagevec, backpage);
-	__pagevec_lru_add_file(pagevec);
+	lru_cache_add_file(backpage);
 
 read_backing_page:
 	ret = bmapping->a_ops->readpage(NULL, backpage);
@@ -452,8 +448,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op,
 	if (block) {
 		/* submit the apparently valid page to the backing fs to be
 		 * read from disk */
-		ret = cachefiles_read_backing_file_one(object, op, page,
-						       &pagevec);
+		ret = cachefiles_read_backing_file_one(object, op, page);
 	} else if (cachefiles_has_space(cache, 0, 1) == 0) {
 		/* there's space in the cache we can use */
 		fscache_mark_page_cached(op, page);
@@ -482,14 +477,11 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
 {
 	struct cachefiles_one_read *monitor = NULL;
 	struct address_space *bmapping = object->backer->d_inode->i_mapping;
-	struct pagevec lru_pvec;
 	struct page *newpage = NULL, *netpage, *_n, *backpage = NULL;
 	int ret = 0;
 
 	_enter("");
 
-	pagevec_init(&lru_pvec, 0);
-
 	list_for_each_entry_safe(netpage, _n, list, lru) {
 		list_del(&netpage->lru);
 
@@ -534,9 +526,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
 		backpage = newpage;
 		newpage = NULL;
 
-		page_cache_get(backpage);
-		if (!pagevec_add(&lru_pvec, backpage))
-			__pagevec_lru_add_file(&lru_pvec);
+		lru_cache_add_file(backpage);
 
 	reread_backing_page:
 		ret = bmapping->a_ops->readpage(NULL, backpage);
@@ -559,9 +549,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
 			goto nomem;
 		}
 
-		page_cache_get(netpage);
-		if (!pagevec_add(&lru_pvec, netpage))
-			__pagevec_lru_add_file(&lru_pvec);
+		lru_cache_add_file(netpage);
 
 		/* install a monitor */
 		page_cache_get(netpage);
@@ -643,9 +631,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
 
 		fscache_mark_page_cached(op, netpage);
 
-		page_cache_get(netpage);
-		if (!pagevec_add(&lru_pvec, netpage))
-			__pagevec_lru_add_file(&lru_pvec);
+		lru_cache_add_file(netpage);
 
 		/* the netpage is unlocked and marked up to date here */
 		fscache_end_io(op, netpage, 0);
@@ -661,8 +647,6 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
 
 out:
 	/* tidy up */
-	pagevec_lru_add_file(&lru_pvec);
-
 	if (newpage)
 		page_cache_release(newpage);
 	if (netpage)
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index 2b6cb23dd14..1d1c41f1014 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -203,7 +203,7 @@ configfs_write_file(struct file *file, const char __user *buf, size_t count, lof
 	mutex_lock(&buffer->mutex);
 	len = fill_write_buffer(buffer, buf, count);
 	if (len > 0)
-		len = flush_write_buffer(file->f_path.dentry, buffer, count);
+		len = flush_write_buffer(file->f_path.dentry, buffer, len);
 	if (len > 0)
 		*ppos += len;
 	mutex_unlock(&buffer->mutex);
diff --git a/fs/coredump.c b/fs/coredump.c
index dafafbafa73..72f816d6cad 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -45,69 +45,79 @@
 #include <trace/events/sched.h>
 
 int core_uses_pid;
-char core_pattern[CORENAME_MAX_SIZE] = "core";
 unsigned int core_pipe_limit;
+char core_pattern[CORENAME_MAX_SIZE] = "core";
+static int core_name_size = CORENAME_MAX_SIZE;
 
 struct core_name {
 	char *corename;
 	int used, size;
 };
-static atomic_t call_count = ATOMIC_INIT(1);
 
 /* The maximal length of core_pattern is also specified in sysctl.c */
 
-static int expand_corename(struct core_name *cn)
+static int expand_corename(struct core_name *cn, int size)
 {
-	char *old_corename = cn->corename;
-
-	cn->size = CORENAME_MAX_SIZE * atomic_inc_return(&call_count);
-	cn->corename = krealloc(old_corename, cn->size, GFP_KERNEL);
+	char *corename = krealloc(cn->corename, size, GFP_KERNEL);
 
-	if (!cn->corename) {
-		kfree(old_corename);
+	if (!corename)
 		return -ENOMEM;
-	}
 
+	if (size > core_name_size) /* racy but harmless */
+		core_name_size = size;
+
+	cn->size = ksize(corename);
+	cn->corename = corename;
 	return 0;
 }
 
+static int cn_vprintf(struct core_name *cn, const char *fmt, va_list arg)
+{
+	int free, need;
+
+again:
+	free = cn->size - cn->used;
+	need = vsnprintf(cn->corename + cn->used, free, fmt, arg);
+	if (need < free) {
+		cn->used += need;
+		return 0;
+	}
+
+	if (!expand_corename(cn, cn->size + need - free + 1))
+		goto again;
+
+	return -ENOMEM;
+}
+
 static int cn_printf(struct core_name *cn, const char *fmt, ...)
 {
-	char *cur;
-	int need;
-	int ret;
 	va_list arg;
+	int ret;
 
 	va_start(arg, fmt);
-	need = vsnprintf(NULL, 0, fmt, arg);
+	ret = cn_vprintf(cn, fmt, arg);
 	va_end(arg);
 
-	if (likely(need < cn->size - cn->used - 1))
-		goto out_printf;
+	return ret;
+}
 
-	ret = expand_corename(cn);
-	if (ret)
-		goto expand_fail;
+static int cn_esc_printf(struct core_name *cn, const char *fmt, ...)
+{
+	int cur = cn->used;
+	va_list arg;
+	int ret;
 
-out_printf:
-	cur = cn->corename + cn->used;
 	va_start(arg, fmt);
-	vsnprintf(cur, need + 1, fmt, arg);
+	ret = cn_vprintf(cn, fmt, arg);
 	va_end(arg);
-	cn->used += need;
-	return 0;
 
-expand_fail:
+	for (; cur < cn->used; ++cur) {
+		if (cn->corename[cur] == '/')
+			cn->corename[cur] = '!';
+	}
 	return ret;
 }
 
-static void cn_escape(char *str)
-{
-	for (; *str; str++)
-		if (*str == '/')
-			*str = '!';
-}
-
 static int cn_print_exe_file(struct core_name *cn)
 {
 	struct file *exe_file;
@@ -115,12 +125,8 @@ static int cn_print_exe_file(struct core_name *cn)
 	int ret;
 
 	exe_file = get_mm_exe_file(current->mm);
-	if (!exe_file) {
-		char *commstart = cn->corename + cn->used;
-		ret = cn_printf(cn, "%s (path unknown)", current->comm);
-		cn_escape(commstart);
-		return ret;
-	}
+	if (!exe_file)
+		return cn_esc_printf(cn, "%s (path unknown)", current->comm);
 
 	pathbuf = kmalloc(PATH_MAX, GFP_TEMPORARY);
 	if (!pathbuf) {
@@ -134,9 +140,7 @@ static int cn_print_exe_file(struct core_name *cn)
 		goto free_buf;
 	}
 
-	cn_escape(path);
-
-	ret = cn_printf(cn, "%s", path);
+	ret = cn_esc_printf(cn, "%s", path);
 
 free_buf:
 	kfree(pathbuf);
@@ -157,19 +161,19 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
 	int pid_in_pattern = 0;
 	int err = 0;
 
-	cn->size = CORENAME_MAX_SIZE * atomic_read(&call_count);
-	cn->corename = kmalloc(cn->size, GFP_KERNEL);
 	cn->used = 0;
-
-	if (!cn->corename)
+	cn->corename = NULL;
+	if (expand_corename(cn, core_name_size))
 		return -ENOMEM;
+	cn->corename[0] = '\0';
+
+	if (ispipe)
+		++pat_ptr;
 
 	/* Repeat as long as we have more pattern to process and more output
 	   space */
 	while (*pat_ptr) {
 		if (*pat_ptr != '%') {
-			if (*pat_ptr == 0)
-				goto out;
 			err = cn_printf(cn, "%c", *pat_ptr++);
 		} else {
 			switch (*++pat_ptr) {
@@ -210,22 +214,16 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
 				break;
 			}
 			/* hostname */
-			case 'h': {
-				char *namestart = cn->corename + cn->used;
+			case 'h':
 				down_read(&uts_sem);
-				err = cn_printf(cn, "%s",
+				err = cn_esc_printf(cn, "%s",
 					      utsname()->nodename);
 				up_read(&uts_sem);
-				cn_escape(namestart);
 				break;
-			}
 			/* executable */
-			case 'e': {
-				char *commstart = cn->corename + cn->used;
-				err = cn_printf(cn, "%s", current->comm);
-				cn_escape(commstart);
+			case 'e':
+				err = cn_esc_printf(cn, "%s", current->comm);
 				break;
-			}
 			case 'E':
 				err = cn_print_exe_file(cn);
 				break;
@@ -244,6 +242,7 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
 			return err;
 	}
 
+out:
 	/* Backward compatibility with core_uses_pid:
 	 *
 	 * If core_pattern does not include a %p (as is the default)
@@ -254,7 +253,6 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
 		if (err)
 			return err;
 	}
-out:
 	return ispipe;
 }
 
@@ -549,7 +547,7 @@ void do_coredump(siginfo_t *siginfo)
 		if (ispipe < 0) {
 			printk(KERN_WARNING "format_corename failed\n");
 			printk(KERN_WARNING "Aborting core\n");
-			goto fail_corename;
+			goto fail_unlock;
 		}
 
 		if (cprm.limit == 1) {
@@ -584,7 +582,7 @@ void do_coredump(siginfo_t *siginfo)
 			goto fail_dropcount;
 		}
 
-		helper_argv = argv_split(GFP_KERNEL, cn.corename+1, NULL);
+		helper_argv = argv_split(GFP_KERNEL, cn.corename, NULL);
 		if (!helper_argv) {
 			printk(KERN_WARNING "%s failed to allocate memory\n",
 			       __func__);
@@ -601,7 +599,7 @@ void do_coredump(siginfo_t *siginfo)
 
 		argv_free(helper_argv);
 		if (retval) {
-			printk(KERN_INFO "Core dump to %s pipe failed\n",
+			printk(KERN_INFO "Core dump to |%s pipe failed\n",
 			       cn.corename);
 			goto close_fail;
 		}
@@ -669,7 +667,6 @@ fail_dropcount:
 		atomic_dec(&core_dump_count);
 fail_unlock:
 	kfree(cn.corename);
-fail_corename:
 	coredump_finish(mm, core_dumped);
 	revert_creds(old_cred);
 fail_creds:
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 0cff4434880..9ad17b15b45 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1977,8 +1977,8 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
 			return -EINVAL;
 		if (copy_from_user(&ksigmask, sigmask, sizeof(ksigmask)))
 			return -EFAULT;
-		sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
-		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+		sigsaved = current->blocked;
+		set_current_blocked(&ksigmask);
 	}
 
 	error = sys_epoll_wait(epfd, events, maxevents, timeout);
@@ -1995,7 +1995,7 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
 			       sizeof(sigsaved));
 			set_restore_sigmask();
 		} else
-			sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+			set_current_blocked(&sigsaved);
 	}
 
 	return error;
@@ -2022,8 +2022,8 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
 		if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
 			return -EFAULT;
 		sigset_from_compat(&ksigmask, &csigmask);
-		sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
-		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+		sigsaved = current->blocked;
+		set_current_blocked(&ksigmask);
 	}
 
 	err = sys_epoll_wait(epfd, events, maxevents, timeout);
@@ -2040,7 +2040,7 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
 			       sizeof(sigsaved));
 			set_restore_sigmask();
 		} else
-			sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+			set_current_blocked(&sigsaved);
 	}
 
 	return err;
diff --git a/fs/exec.c b/fs/exec.c
index 03b907cfd76..9c73def8764 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -932,6 +932,7 @@ static int de_thread(struct task_struct *tsk)
 		 * also take its birthdate (always earlier than our own).
 		 */
 		tsk->start_time = leader->start_time;
+		tsk->real_start_time = leader->real_start_time;
 
 		BUG_ON(!same_thread_group(leader, tsk));
 		BUG_ON(has_group_leader_pid(tsk));
@@ -947,9 +948,8 @@ static int de_thread(struct task_struct *tsk)
 		 * Note: The old leader also uses this pid until release_task
 		 *       is called.  Odd but simple and correct.
 		 */
-		detach_pid(tsk, PIDTYPE_PID);
 		tsk->pid = leader->pid;
-		attach_pid(tsk, PIDTYPE_PID,  task_pid(leader));
+		change_pid(tsk, PIDTYPE_PID, task_pid(leader));
 		transfer_pid(leader, tsk, PIDTYPE_PGID);
 		transfer_pid(leader, tsk, PIDTYPE_SID);
 
@@ -1465,7 +1465,6 @@ static int do_execve_common(const char *filename,
 	struct files_struct *displaced;
 	bool clear_in_exec;
 	int retval;
-	const struct cred *cred = current_cred();
 
 	/*
 	 * We move the actual failure in case of RLIMIT_NPROC excess from
@@ -1474,7 +1473,7 @@ static int do_execve_common(const char *filename,
 	 * whether NPROC limit is still exceeded.
 	 */
 	if ((current->flags & PF_NPROC_EXCEEDED) &&
-	    atomic_read(&cred->user->processes) > rlimit(RLIMIT_NPROC)) {
+	    atomic_read(&current_user()->processes) > rlimit(RLIMIT_NPROC)) {
 		retval = -EAGAIN;
 		goto out_ret;
 	}
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index f67668f724b..2bd85486b87 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1985,6 +1985,7 @@ static const struct address_space_operations ext3_ordered_aops = {
 	.direct_IO		= ext3_direct_IO,
 	.migratepage		= buffer_migrate_page,
 	.is_partially_uptodate  = block_is_partially_uptodate,
+	.is_dirty_writeback	= buffer_check_dirty_writeback,
 	.error_remove_page	= generic_error_remove_page,
 };
 
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 359d307b550..628e22a5a54 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -30,7 +30,7 @@ void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
 		va_start(args, fmt);
 		vaf.fmt = fmt;
 		vaf.va = &args;
-		printk(KERN_ERR "FAT-fs (%s): error, %pV\n", sb->s_id, &vaf);
+		fat_msg(sb, KERN_ERR, "error, %pV", &vaf);
 		va_end(args);
 	}
 
@@ -38,8 +38,7 @@ void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
 		panic("FAT-fs (%s): fs panic from previous error\n", sb->s_id);
 	else if (opts->errors == FAT_ERRORS_RO && !(sb->s_flags & MS_RDONLY)) {
 		sb->s_flags |= MS_RDONLY;
-		printk(KERN_ERR "FAT-fs (%s): Filesystem has been "
-				"set read-only\n", sb->s_id);
+		fat_msg(sb, KERN_ERR, "Filesystem has been set read-only");
 	}
 }
 EXPORT_SYMBOL_GPL(__fat_fs_error);
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 9a0cdde14a0..0b578598c6a 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -785,7 +785,7 @@ static const struct super_operations fuse_super_operations = {
 static void sanitize_global_limit(unsigned *limit)
 {
 	if (*limit == 0)
-		*limit = ((num_physpages << PAGE_SHIFT) >> 13) /
+		*limit = ((totalram_pages << PAGE_SHIFT) >> 13) /
 			 sizeof(struct fuse_req);
 
 	if (*limit >= 1 << 16)
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index fc90ab11c34..4338ff32959 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -69,7 +69,7 @@ static char *dentry_name(struct dentry *dentry, int extra)
 	struct dentry *parent;
 	char *root, *name;
 	const char *seg_name;
-	int len, seg_len;
+	int len, seg_len, root_len;
 
 	len = 0;
 	parent = dentry;
@@ -81,7 +81,8 @@ static char *dentry_name(struct dentry *dentry, int extra)
 	}
 
 	root = "proc";
-	len += strlen(root);
+	root_len = strlen(root);
+	len += root_len;
 	name = kmalloc(len + extra + 1, GFP_KERNEL);
 	if (name == NULL)
 		return NULL;
@@ -91,7 +92,7 @@ static char *dentry_name(struct dentry *dentry, int extra)
 	while (parent->d_parent != parent) {
 		if (is_pid(parent)) {
 			seg_name = "pid";
-			seg_len = strlen("pid");
+			seg_len = strlen(seg_name);
 		}
 		else {
 			seg_name = parent->d_name.name;
@@ -100,10 +101,10 @@ static char *dentry_name(struct dentry *dentry, int extra)
 
 		len -= seg_len + 1;
 		name[len] = '/';
-		strncpy(&name[len + 1], seg_name, seg_len);
+		memcpy(&name[len + 1], seg_name, seg_len);
 		parent = parent->d_parent;
 	}
-	strncpy(name, root, strlen(root));
+	memcpy(name, root, root_len);
 	return name;
 }
 
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index a2aa97d4567..10d6c41aeca 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -305,7 +305,7 @@ static int lockd_start_svc(struct svc_serv *serv)
 	svc_sock_update_bufs(serv);
 	serv->sv_maxconn = nlm_max_connections;
 
-	nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
+	nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, "%s", serv->sv_name);
 	if (IS_ERR(nlmsvc_task)) {
 		error = PTR_ERR(nlmsvc_task);
 		printk(KERN_WARNING
diff --git a/fs/ncpfs/mmap.c b/fs/ncpfs/mmap.c
index ee24df5af1f..3c5dd55d284 100644
--- a/fs/ncpfs/mmap.c
+++ b/fs/ncpfs/mmap.c
@@ -117,7 +117,7 @@ int ncp_mmap(struct file *file, struct vm_area_struct *vma)
 		return -EINVAL;
 	/* we do not support files bigger than 4GB... We eventually 
 	   supports just 4GB... */
-	if (((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff 
+	if (vma_pages(vma) + vma->vm_pgoff
 	   > (1U << (32 - PAGE_SHIFT)))
 		return -EFBIG;
 
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index cff089a412c..da6a43d19aa 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -211,7 +211,6 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
 	struct svc_rqst *rqstp;
 	int (*callback_svc)(void *vrqstp);
 	struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion];
-	char svc_name[12];
 	int ret;
 
 	nfs_callback_bc_serv(minorversion, xprt, serv);
@@ -235,10 +234,10 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
 
 	svc_sock_update_bufs(serv);
 
-	sprintf(svc_name, "nfsv4.%u-svc", minorversion);
 	cb_info->serv = serv;
 	cb_info->rqst = rqstp;
-	cb_info->task = kthread_run(callback_svc, cb_info->rqst, svc_name);
+	cb_info->task = kthread_run(callback_svc, cb_info->rqst,
+				    "nfsv4.%u-svc", minorversion);
 	if (IS_ERR(cb_info->task)) {
 		ret = PTR_ERR(cb_info->task);
 		svc_exit_thread(cb_info->rqst);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 5d051419527..d7ed697133f 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -33,6 +33,7 @@
 #include <linux/pagevec.h>
 #include <linux/namei.h>
 #include <linux/mount.h>
+#include <linux/swap.h>
 #include <linux/sched.h>
 #include <linux/kmemleak.h>
 #include <linux/xattr.h>
@@ -1758,7 +1759,6 @@ EXPORT_SYMBOL_GPL(nfs_unlink);
  */
 int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 {
-	struct pagevec lru_pvec;
 	struct page *page;
 	char *kaddr;
 	struct iattr attr;
@@ -1798,11 +1798,8 @@ int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 	 * No big deal if we can't add this page to the page cache here.
 	 * READLINK will get the missing page from the server if needed.
 	 */
-	pagevec_init(&lru_pvec, 0);
-	if (!add_to_page_cache(page, dentry->d_inode->i_mapping, 0,
+	if (!add_to_page_cache_lru(page, dentry->d_inode->i_mapping, 0,
 							GFP_KERNEL)) {
-		pagevec_add(&lru_pvec, page);
-		pagevec_lru_add_file(&lru_pvec);
 		SetPageUptodate(page);
 		unlock_page(page);
 	} else
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 6b4a79f4ad1..94e94bd11aa 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -495,6 +495,35 @@ static int nfs_release_page(struct page *page, gfp_t gfp)
 	return nfs_fscache_release_page(page, gfp);
 }
 
+static void nfs_check_dirty_writeback(struct page *page,
+				bool *dirty, bool *writeback)
+{
+	struct nfs_inode *nfsi;
+	struct address_space *mapping = page_file_mapping(page);
+
+	if (!mapping || PageSwapCache(page))
+		return;
+
+	/*
+	 * Check if an unstable page is currently being committed and
+	 * if so, have the VM treat it as if the page is under writeback
+	 * so it will not block due to pages that will shortly be freeable.
+	 */
+	nfsi = NFS_I(mapping->host);
+	if (test_bit(NFS_INO_COMMIT, &nfsi->flags)) {
+		*writeback = true;
+		return;
+	}
+
+	/*
+	 * If PagePrivate() is set, then the page is not freeable and as the
+	 * inode is not being committed, it's not going to be cleaned in the
+	 * near future so treat it as dirty
+	 */
+	if (PagePrivate(page))
+		*dirty = true;
+}
+
 /*
  * Attempt to clear the private state associated with a page when an error
  * occurs that requires the cached contents of an inode to be written back or
@@ -542,6 +571,7 @@ const struct address_space_operations nfs_file_aops = {
 	.direct_IO = nfs_direct_IO,
 	.migratepage = nfs_migrate_page,
 	.launder_page = nfs_launder_page,
+	.is_dirty_writeback = nfs_check_dirty_writeback,
 	.error_remove_page = generic_error_remove_page,
 #ifdef CONFIG_NFS_SWAP
 	.swap_activate = nfs_swap_activate,
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index ff10b4aa534..55418811a55 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1194,7 +1194,7 @@ void nfs4_schedule_state_manager(struct nfs_client *clp)
 	snprintf(buf, sizeof(buf), "%s-manager",
 			rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
 	rcu_read_unlock();
-	task = kthread_run(nfs4_run_state_manager, clp, buf);
+	task = kthread_run(nfs4_run_state_manager, clp, "%s", buf);
 	if (IS_ERR(task)) {
 		printk(KERN_ERR "%s: kthread_run: %ld\n",
 			__func__, PTR_ERR(task));
diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c
index eed4d7b2624..741fd02e044 100644
--- a/fs/nilfs2/alloc.c
+++ b/fs/nilfs2/alloc.c
@@ -398,6 +398,69 @@ nilfs_palloc_rest_groups_in_desc_block(const struct inode *inode,
 }
 
 /**
+ * nilfs_palloc_count_desc_blocks - count descriptor blocks number
+ * @inode: inode of metadata file using this allocator
+ * @desc_blocks: descriptor blocks number [out]
+ */
+static int nilfs_palloc_count_desc_blocks(struct inode *inode,
+					    unsigned long *desc_blocks)
+{
+	unsigned long blknum;
+	int ret;
+
+	ret = nilfs_bmap_last_key(NILFS_I(inode)->i_bmap, &blknum);
+	if (likely(!ret))
+		*desc_blocks = DIV_ROUND_UP(
+			blknum, NILFS_MDT(inode)->mi_blocks_per_desc_block);
+	return ret;
+}
+
+/**
+ * nilfs_palloc_mdt_file_can_grow - check potential opportunity for
+ *					MDT file growing
+ * @inode: inode of metadata file using this allocator
+ * @desc_blocks: known current descriptor blocks count
+ */
+static inline bool nilfs_palloc_mdt_file_can_grow(struct inode *inode,
+						    unsigned long desc_blocks)
+{
+	return (nilfs_palloc_groups_per_desc_block(inode) * desc_blocks) <
+			nilfs_palloc_groups_count(inode);
+}
+
+/**
+ * nilfs_palloc_count_max_entries - count max number of entries that can be
+ *					described by descriptor blocks count
+ * @inode: inode of metadata file using this allocator
+ * @nused: current number of used entries
+ * @nmaxp: max number of entries [out]
+ */
+int nilfs_palloc_count_max_entries(struct inode *inode, u64 nused, u64 *nmaxp)
+{
+	unsigned long desc_blocks = 0;
+	u64 entries_per_desc_block, nmax;
+	int err;
+
+	err = nilfs_palloc_count_desc_blocks(inode, &desc_blocks);
+	if (unlikely(err))
+		return err;
+
+	entries_per_desc_block = (u64)nilfs_palloc_entries_per_group(inode) *
+				nilfs_palloc_groups_per_desc_block(inode);
+	nmax = entries_per_desc_block * desc_blocks;
+
+	if (nused == nmax &&
+			nilfs_palloc_mdt_file_can_grow(inode, desc_blocks))
+		nmax += entries_per_desc_block;
+
+	if (nused > nmax)
+		return -ERANGE;
+
+	*nmaxp = nmax;
+	return 0;
+}
+
+/**
  * nilfs_palloc_prepare_alloc_entry - prepare to allocate a persistent object
  * @inode: inode of metadata file using this allocator
  * @req: nilfs_palloc_req structure exchanged for the allocation
diff --git a/fs/nilfs2/alloc.h b/fs/nilfs2/alloc.h
index fb723810054..4bd6451b570 100644
--- a/fs/nilfs2/alloc.h
+++ b/fs/nilfs2/alloc.h
@@ -48,6 +48,8 @@ int nilfs_palloc_get_entry_block(struct inode *, __u64, int,
 void *nilfs_palloc_block_get_entry(const struct inode *, __u64,
 				   const struct buffer_head *, void *);
 
+int nilfs_palloc_count_max_entries(struct inode *, u64, u64 *);
+
 /**
  * nilfs_palloc_req - persistent allocator request and reply
  * @pr_entry_nr: entry number (vblocknr or inode number)
diff --git a/fs/nilfs2/ifile.c b/fs/nilfs2/ifile.c
index d8e65bde083..6548c7851b4 100644
--- a/fs/nilfs2/ifile.c
+++ b/fs/nilfs2/ifile.c
@@ -160,6 +160,28 @@ int nilfs_ifile_get_inode_block(struct inode *ifile, ino_t ino,
 }
 
 /**
+ * nilfs_ifile_count_free_inodes - calculate free inodes count
+ * @ifile: ifile inode
+ * @nmaxinodes: current maximum of available inodes count [out]
+ * @nfreeinodes: free inodes count [out]
+ */
+int nilfs_ifile_count_free_inodes(struct inode *ifile,
+				    u64 *nmaxinodes, u64 *nfreeinodes)
+{
+	u64 nused;
+	int err;
+
+	*nmaxinodes = 0;
+	*nfreeinodes = 0;
+
+	nused = atomic64_read(&NILFS_I(ifile)->i_root->inodes_count);
+	err = nilfs_palloc_count_max_entries(ifile, nused, nmaxinodes);
+	if (likely(!err))
+		*nfreeinodes = *nmaxinodes - nused;
+	return err;
+}
+
+/**
  * nilfs_ifile_read - read or get ifile inode
  * @sb: super block instance
  * @root: root object
diff --git a/fs/nilfs2/ifile.h b/fs/nilfs2/ifile.h
index 59b6f2b51df..679674d1337 100644
--- a/fs/nilfs2/ifile.h
+++ b/fs/nilfs2/ifile.h
@@ -49,6 +49,8 @@ int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
 int nilfs_ifile_delete_inode(struct inode *, ino_t);
 int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
 
+int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
+
 int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
 		     size_t inode_size, struct nilfs_inode *raw_inode,
 		     struct inode **inodep);
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index bccfec8343c..b1a5277cfd1 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -54,7 +54,7 @@ void nilfs_inode_add_blocks(struct inode *inode, int n)
 
 	inode_add_bytes(inode, (1 << inode->i_blkbits) * n);
 	if (root)
-		atomic_add(n, &root->blocks_count);
+		atomic64_add(n, &root->blocks_count);
 }
 
 void nilfs_inode_sub_blocks(struct inode *inode, int n)
@@ -63,7 +63,7 @@ void nilfs_inode_sub_blocks(struct inode *inode, int n)
 
 	inode_sub_bytes(inode, (1 << inode->i_blkbits) * n);
 	if (root)
-		atomic_sub(n, &root->blocks_count);
+		atomic64_sub(n, &root->blocks_count);
 }
 
 /**
@@ -369,7 +369,7 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
 		goto failed_ifile_create_inode;
 	/* reference count of i_bh inherits from nilfs_mdt_read_block() */
 
-	atomic_inc(&root->inodes_count);
+	atomic64_inc(&root->inodes_count);
 	inode_init_owner(inode, dir, mode);
 	inode->i_ino = ino;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
@@ -801,7 +801,7 @@ void nilfs_evict_inode(struct inode *inode)
 
 	ret = nilfs_ifile_delete_inode(ii->i_root->ifile, inode->i_ino);
 	if (!ret)
-		atomic_dec(&ii->i_root->inodes_count);
+		atomic64_dec(&ii->i_root->inodes_count);
 
 	nilfs_clear_inode(inode);
 
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index a5752a58993..bd88a746106 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -835,9 +835,9 @@ static int nilfs_segctor_fill_in_checkpoint(struct nilfs_sc_info *sci)
 	raw_cp->cp_snapshot_list.ssl_next = 0;
 	raw_cp->cp_snapshot_list.ssl_prev = 0;
 	raw_cp->cp_inodes_count =
-		cpu_to_le64(atomic_read(&sci->sc_root->inodes_count));
+		cpu_to_le64(atomic64_read(&sci->sc_root->inodes_count));
 	raw_cp->cp_blocks_count =
-		cpu_to_le64(atomic_read(&sci->sc_root->blocks_count));
+		cpu_to_le64(atomic64_read(&sci->sc_root->blocks_count));
 	raw_cp->cp_nblk_inc =
 		cpu_to_le64(sci->sc_nblk_inc + sci->sc_nblk_this_inc);
 	raw_cp->cp_create = cpu_to_le64(sci->sc_seg_ctime);
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index c7d1f9f18b0..1427de5ebf4 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -554,8 +554,10 @@ int nilfs_attach_checkpoint(struct super_block *sb, __u64 cno, int curr_mnt,
 	if (err)
 		goto failed_bh;
 
-	atomic_set(&root->inodes_count, le64_to_cpu(raw_cp->cp_inodes_count));
-	atomic_set(&root->blocks_count, le64_to_cpu(raw_cp->cp_blocks_count));
+	atomic64_set(&root->inodes_count,
+			le64_to_cpu(raw_cp->cp_inodes_count));
+	atomic64_set(&root->blocks_count,
+			le64_to_cpu(raw_cp->cp_blocks_count));
 
 	nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, cno, bh_cp);
 
@@ -609,6 +611,7 @@ static int nilfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	unsigned long overhead;
 	unsigned long nrsvblocks;
 	sector_t nfreeblocks;
+	u64 nmaxinodes, nfreeinodes;
 	int err;
 
 	/*
@@ -633,14 +636,34 @@ static int nilfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	if (unlikely(err))
 		return err;
 
+	err = nilfs_ifile_count_free_inodes(root->ifile,
+					    &nmaxinodes, &nfreeinodes);
+	if (unlikely(err)) {
+		printk(KERN_WARNING
+			"NILFS warning: fail to count free inodes: err %d.\n",
+			err);
+		if (err == -ERANGE) {
+			/*
+			 * If nilfs_palloc_count_max_entries() returns
+			 * -ERANGE error code then we simply treat
+			 * curent inodes count as maximum possible and
+			 * zero as free inodes value.
+			 */
+			nmaxinodes = atomic64_read(&root->inodes_count);
+			nfreeinodes = 0;
+			err = 0;
+		} else
+			return err;
+	}
+
 	buf->f_type = NILFS_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = blocks - overhead;
 	buf->f_bfree = nfreeblocks;
 	buf->f_bavail = (buf->f_bfree >= nrsvblocks) ?
 		(buf->f_bfree - nrsvblocks) : 0;
-	buf->f_files = atomic_read(&root->inodes_count);
-	buf->f_ffree = 0; /* nilfs_count_free_inodes(sb); */
+	buf->f_files = nmaxinodes;
+	buf->f_ffree = nfreeinodes;
 	buf->f_namelen = NILFS_NAME_LEN;
 	buf->f_fsid.val[0] = (u32)id;
 	buf->f_fsid.val[1] = (u32)(id >> 32);
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 41e6a04a561..94c451ce6d2 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -764,8 +764,8 @@ nilfs_find_or_create_root(struct the_nilfs *nilfs, __u64 cno)
 	new->ifile = NULL;
 	new->nilfs = nilfs;
 	atomic_set(&new->count, 1);
-	atomic_set(&new->inodes_count, 0);
-	atomic_set(&new->blocks_count, 0);
+	atomic64_set(&new->inodes_count, 0);
+	atomic64_set(&new->blocks_count, 0);
 
 	rb_link_node(&new->rb_node, parent, p);
 	rb_insert_color(&new->rb_node, &nilfs->ns_cptree);
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index be1267a34ce..de8cc53b4a5 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -241,8 +241,8 @@ struct nilfs_root {
 	struct the_nilfs *nilfs;
 	struct inode *ifile;
 
-	atomic_t inodes_count;
-	atomic_t blocks_count;
+	atomic64_t inodes_count;
+	atomic64_t blocks_count;
 };
 
 /* Special checkpoint number */
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index b8a9d87231b..17e6bdde96c 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -5655,7 +5655,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
 					       &ref_tree, NULL);
 		if (ret) {
 			mlog_errno(ret);
-			goto out;
+			goto bail;
 		}
 
 		ret = ocfs2_prepare_refcount_change_for_del(inode,
@@ -5666,7 +5666,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
 							    &extra_blocks);
 		if (ret < 0) {
 			mlog_errno(ret);
-			goto out;
+			goto bail;
 		}
 	}
 
@@ -5674,7 +5674,7 @@ int ocfs2_remove_btree_range(struct inode *inode,
 						 extra_blocks);
 	if (ret) {
 		mlog_errno(ret);
-		return ret;
+		goto bail;
 	}
 
 	mutex_lock(&tl_inode->i_mutex);
@@ -5734,7 +5734,7 @@ out_commit:
 	ocfs2_commit_trans(osb, handle);
 out:
 	mutex_unlock(&tl_inode->i_mutex);
-
+bail:
 	if (meta_ac)
 		ocfs2_free_alloc_context(meta_ac);
 
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 42252bf64b5..5c1c864e81c 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -176,7 +176,7 @@ static void o2hb_dead_threshold_set(unsigned int threshold)
 	}
 }
 
-static int o2hb_global_hearbeat_mode_set(unsigned int hb_mode)
+static int o2hb_global_heartbeat_mode_set(unsigned int hb_mode)
 {
 	int ret = -1;
 
@@ -500,7 +500,7 @@ static int o2hb_issue_node_write(struct o2hb_region *reg,
 	}
 
 	atomic_inc(&write_wc->wc_num_reqs);
-	submit_bio(WRITE, bio);
+	submit_bio(WRITE_SYNC, bio);
 
 	status = 0;
 bail:
@@ -2271,7 +2271,7 @@ ssize_t o2hb_heartbeat_group_mode_store(struct o2hb_heartbeat_group *group,
 		if (strnicmp(page, o2hb_heartbeat_mode_desc[i], len))
 			continue;
 
-		ret = o2hb_global_hearbeat_mode_set(i);
+		ret = o2hb_global_heartbeat_mode_set(i);
 		if (!ret)
 			printk(KERN_NOTICE "o2hb: Heartbeat mode set to %s\n",
 			       o2hb_heartbeat_mode_desc[i]);
@@ -2304,7 +2304,7 @@ static struct configfs_attribute *o2hb_heartbeat_group_attrs[] = {
 	NULL,
 };
 
-static struct configfs_item_operations o2hb_hearbeat_group_item_ops = {
+static struct configfs_item_operations o2hb_heartbeat_group_item_ops = {
 	.show_attribute		= o2hb_heartbeat_group_show,
 	.store_attribute	= o2hb_heartbeat_group_store,
 };
@@ -2316,7 +2316,7 @@ static struct configfs_group_operations o2hb_heartbeat_group_group_ops = {
 
 static struct config_item_type o2hb_heartbeat_group_type = {
 	.ct_group_ops	= &o2hb_heartbeat_group_group_ops,
-	.ct_item_ops	= &o2hb_hearbeat_group_item_ops,
+	.ct_item_ops	= &o2hb_heartbeat_group_item_ops,
 	.ct_attrs	= o2hb_heartbeat_group_attrs,
 	.ct_owner	= THIS_MODULE,
 };
@@ -2389,6 +2389,9 @@ static int o2hb_region_pin(const char *region_uuid)
 	assert_spin_locked(&o2hb_live_lock);
 
 	list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) {
+		if (reg->hr_item_dropped)
+			continue;
+
 		uuid = config_item_name(&reg->hr_item);
 
 		/* local heartbeat */
@@ -2439,6 +2442,9 @@ static void o2hb_region_unpin(const char *region_uuid)
 	assert_spin_locked(&o2hb_live_lock);
 
 	list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) {
+		if (reg->hr_item_dropped)
+			continue;
+
 		uuid = config_item_name(&reg->hr_item);
 		if (region_uuid) {
 			if (strcmp(region_uuid, uuid))
@@ -2654,6 +2660,9 @@ int o2hb_get_all_regions(char *region_uuids, u8 max_regions)
 
 	p = region_uuids;
 	list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) {
+		if (reg->hr_item_dropped)
+			continue;
+
 		mlog(0, "Region: %s\n", config_item_name(&reg->hr_item));
 		if (numregs < max_regions) {
 			memcpy(p, config_item_name(&reg->hr_item),
diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c
index c19897d0fe1..1ec141e758d 100644
--- a/fs/ocfs2/cluster/quorum.c
+++ b/fs/ocfs2/cluster/quorum.c
@@ -264,7 +264,7 @@ void o2quo_hb_still_up(u8 node)
 /* This is analogous to hb_up.  as a node's connection comes up we delay the
  * quorum decision until we see it heartbeating.  the hold will be droped in
  * hb_up or hb_down.  it might be perpetuated by con_err until hb_down.  if
- * it's already heartbeating we we might be dropping a hold that conn_up got.
+ * it's already heartbeating we might be dropping a hold that conn_up got.
  * */
 void o2quo_conn_up(u8 node)
 {
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index aa88bd8bced..d644dc61142 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -406,6 +406,9 @@ static void sc_kref_release(struct kref *kref)
 	sc->sc_node = NULL;
 
 	o2net_debug_del_sc(sc);
+
+	if (sc->sc_page)
+		__free_page(sc->sc_page);
 	kfree(sc);
 }
 
@@ -630,19 +633,19 @@ static void o2net_state_change(struct sock *sk)
 	state_change = sc->sc_state_change;
 
 	switch(sk->sk_state) {
-		/* ignore connecting sockets as they make progress */
-		case TCP_SYN_SENT:
-		case TCP_SYN_RECV:
-			break;
-		case TCP_ESTABLISHED:
-			o2net_sc_queue_work(sc, &sc->sc_connect_work);
-			break;
-		default:
-			printk(KERN_INFO "o2net: Connection to " SC_NODEF_FMT
-			      " shutdown, state %d\n",
-			      SC_NODEF_ARGS(sc), sk->sk_state);
-			o2net_sc_queue_work(sc, &sc->sc_shutdown_work);
-			break;
+	/* ignore connecting sockets as they make progress */
+	case TCP_SYN_SENT:
+	case TCP_SYN_RECV:
+		break;
+	case TCP_ESTABLISHED:
+		o2net_sc_queue_work(sc, &sc->sc_connect_work);
+		break;
+	default:
+		printk(KERN_INFO "o2net: Connection to " SC_NODEF_FMT
+			" shutdown, state %d\n",
+			SC_NODEF_ARGS(sc), sk->sk_state);
+		o2net_sc_queue_work(sc, &sc->sc_shutdown_work);
+		break;
 	}
 out:
 	read_unlock(&sk->sk_callback_lock);
diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 975810b9849..47e67c2d228 100644
--- a/fs/ocfs2/dlm/dlmlock.c
+++ b/fs/ocfs2/dlm/dlmlock.c
@@ -178,6 +178,7 @@ static enum dlm_status dlmlock_master(struct dlm_ctxt *dlm,
 				     lock->ml.node);
 			}
 		} else {
+			status = DLM_NORMAL;
 			dlm_lock_get(lock);
 			list_add_tail(&lock->list, &res->blocked);
 			kick_thread = 1;
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index e68588e6b1e..773bd32bfd8 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -55,9 +55,6 @@
 static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node);
 
 static int dlm_recovery_thread(void *data);
-void dlm_complete_recovery_thread(struct dlm_ctxt *dlm);
-int dlm_launch_recovery_thread(struct dlm_ctxt *dlm);
-void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
 static int dlm_do_recovery(struct dlm_ctxt *dlm);
 
 static int dlm_pick_recovery_master(struct dlm_ctxt *dlm);
@@ -789,7 +786,7 @@ static int dlm_request_all_locks(struct dlm_ctxt *dlm, u8 request_from,
 				 u8 dead_node)
 {
 	struct dlm_lock_request lr;
-	enum dlm_status ret;
+	int ret;
 
 	mlog(0, "\n");
 
@@ -802,7 +799,6 @@ static int dlm_request_all_locks(struct dlm_ctxt *dlm, u8 request_from,
 	lr.dead_node = dead_node;
 
 	// send message
-	ret = DLM_NOLOCKMGR;
 	ret = o2net_send_message(DLM_LOCK_REQUEST_MSG, dlm->key,
 				 &lr, sizeof(lr), request_from, NULL);
 
@@ -2696,6 +2692,7 @@ int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data,
 		     dlm->name, br->node_idx, br->dead_node,
 		     dlm->reco.dead_node, dlm->reco.new_master);
 		spin_unlock(&dlm->spinlock);
+		dlm_put(dlm);
 		return -EAGAIN;
 	}
 	spin_unlock(&dlm->spinlock);
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index a3385b63ff5..96f9ac237e8 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -200,7 +200,6 @@ void ocfs2_complete_quota_recovery(struct ocfs2_super *osb);
 
 static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb)
 {
-	atomic_set(&osb->needs_checkpoint, 1);
 	wake_up(&osb->checkpoint_event);
 }
 
@@ -538,7 +537,7 @@ static inline int ocfs2_calc_extend_credits(struct super_block *sb,
 	extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth);
 
 	return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks +
-	       ocfs2_quota_trans_credits(sb);
+	       ocfs2_quota_trans_credits(sb) + bits_wanted;
 }
 
 static inline int ocfs2_calc_symlink_credits(struct super_block *sb)
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index b4a5cdf9dbc..be3f8676a43 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -522,7 +522,7 @@ static int __ocfs2_mknod_locked(struct inode *dir,
 
 	fe->i_last_eb_blk = 0;
 	strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
-	le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
+	fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
 	fe->i_atime = fe->i_ctime = fe->i_mtime =
 		cpu_to_le64(CURRENT_TIME.tv_sec);
 	fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
@@ -773,7 +773,7 @@ static int ocfs2_remote_dentry_delete(struct dentry *dentry)
 	return ret;
 }
 
-static inline int inode_is_unlinkable(struct inode *inode)
+static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
 {
 	if (S_ISDIR(inode->i_mode)) {
 		if (inode->i_nlink == 2)
@@ -791,6 +791,7 @@ static int ocfs2_unlink(struct inode *dir,
 {
 	int status;
 	int child_locked = 0;
+	bool is_unlinkable = false;
 	struct inode *inode = dentry->d_inode;
 	struct inode *orphan_dir = NULL;
 	struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
@@ -865,7 +866,7 @@ static int ocfs2_unlink(struct inode *dir,
 		goto leave;
 	}
 
-	if (inode_is_unlinkable(inode)) {
+	if (ocfs2_inode_is_unlinkable(inode)) {
 		status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
 						  OCFS2_I(inode)->ip_blkno,
 						  orphan_name, &orphan_insert);
@@ -873,6 +874,7 @@ static int ocfs2_unlink(struct inode *dir,
 			mlog_errno(status);
 			goto leave;
 		}
+		is_unlinkable = true;
 	}
 
 	handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
@@ -892,15 +894,6 @@ static int ocfs2_unlink(struct inode *dir,
 
 	fe = (struct ocfs2_dinode *) fe_bh->b_data;
 
-	if (inode_is_unlinkable(inode)) {
-		status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
-					  &orphan_insert, orphan_dir);
-		if (status < 0) {
-			mlog_errno(status);
-			goto leave;
-		}
-	}
-
 	/* delete the name from the parent dir */
 	status = ocfs2_delete_entry(handle, dir, &lookup);
 	if (status < 0) {
@@ -923,6 +916,14 @@ static int ocfs2_unlink(struct inode *dir,
 		mlog_errno(status);
 		if (S_ISDIR(inode->i_mode))
 			inc_nlink(dir);
+		goto leave;
+	}
+
+	if (is_unlinkable) {
+		status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
+				orphan_name, &orphan_insert, orphan_dir);
+		if (status < 0)
+			mlog_errno(status);
 	}
 
 leave:
@@ -2012,6 +2013,21 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
 		goto leave;
 	}
 
+	/*
+	 * We're going to journal the change of i_flags and i_orphaned_slot.
+	 * It's safe anyway, though some callers may duplicate the journaling.
+	 * Journaling within the func just make the logic look more
+	 * straightforward.
+	 */
+	status = ocfs2_journal_access_di(handle,
+					 INODE_CACHE(inode),
+					 fe_bh,
+					 OCFS2_JOURNAL_ACCESS_WRITE);
+	if (status < 0) {
+		mlog_errno(status);
+		goto leave;
+	}
+
 	/* we're a cluster, and nlink can change on disk from
 	 * underneath us... */
 	orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
@@ -2026,25 +2042,10 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
 				   orphan_dir_bh, lookup);
 	if (status < 0) {
 		mlog_errno(status);
-		goto leave;
-	}
-
-	/*
-	 * We're going to journal the change of i_flags and i_orphaned_slot.
-	 * It's safe anyway, though some callers may duplicate the journaling.
-	 * Journaling within the func just make the logic look more
-	 * straightforward.
-	 */
-	status = ocfs2_journal_access_di(handle,
-					 INODE_CACHE(inode),
-					 fe_bh,
-					 OCFS2_JOURNAL_ACCESS_WRITE);
-	if (status < 0) {
-		mlog_errno(status);
-		goto leave;
+		goto rollback;
 	}
 
-	le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
+	fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
 	OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
 
 	/* Record which orphan dir our inode now resides
@@ -2057,11 +2058,16 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
 	trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
 				   osb->slot_num);
 
+rollback:
+	if (status < 0) {
+		if (S_ISDIR(inode->i_mode))
+			ocfs2_add_links_count(orphan_fe, -1);
+		set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
+	}
+
 leave:
 	brelse(orphan_dir_bh);
 
-	if (status)
-		mlog_errno(status);
 	return status;
 }
 
@@ -2434,7 +2440,7 @@ int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
 	}
 
 	di = (struct ocfs2_dinode *)di_bh->b_data;
-	le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
+	di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
 	di->i_orphaned_slot = 0;
 	set_nlink(inode, 1);
 	ocfs2_set_links_count(di, inode->i_nlink);
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index d355e6e36b3..3a903470c79 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -347,7 +347,6 @@ struct ocfs2_super
 	struct task_struct *recovery_thread_task;
 	int disable_recovery;
 	wait_queue_head_t checkpoint_event;
-	atomic_t needs_checkpoint;
 	struct ocfs2_journal *journal;
 	unsigned long osb_commit_interval;
 
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index b7e74b580c0..5397c07ce60 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -1422,7 +1422,7 @@ static int ocfs2_relink_block_group(handle_t *handle,
 	int status;
 	/* there is a really tiny chance the journal calls could fail,
 	 * but we wouldn't want inconsistent blocks in *any* case. */
-	u64 fe_ptr, bg_ptr, prev_bg_ptr;
+	u64 bg_ptr, prev_bg_ptr;
 	struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
 	struct ocfs2_group_desc *bg = (struct ocfs2_group_desc *) bg_bh->b_data;
 	struct ocfs2_group_desc *prev_bg = (struct ocfs2_group_desc *) prev_bg_bh->b_data;
@@ -1437,51 +1437,44 @@ static int ocfs2_relink_block_group(handle_t *handle,
 		(unsigned long long)le64_to_cpu(bg->bg_blkno),
 		(unsigned long long)le64_to_cpu(prev_bg->bg_blkno));
 
-	fe_ptr = le64_to_cpu(fe->id2.i_chain.cl_recs[chain].c_blkno);
 	bg_ptr = le64_to_cpu(bg->bg_next_group);
 	prev_bg_ptr = le64_to_cpu(prev_bg->bg_next_group);
 
 	status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode),
 					 prev_bg_bh,
 					 OCFS2_JOURNAL_ACCESS_WRITE);
-	if (status < 0) {
-		mlog_errno(status);
-		goto out_rollback;
-	}
+	if (status < 0)
+		goto out;
 
 	prev_bg->bg_next_group = bg->bg_next_group;
 	ocfs2_journal_dirty(handle, prev_bg_bh);
 
 	status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode),
 					 bg_bh, OCFS2_JOURNAL_ACCESS_WRITE);
-	if (status < 0) {
-		mlog_errno(status);
-		goto out_rollback;
-	}
+	if (status < 0)
+		goto out_rollback_prev_bg;
 
 	bg->bg_next_group = fe->id2.i_chain.cl_recs[chain].c_blkno;
 	ocfs2_journal_dirty(handle, bg_bh);
 
 	status = ocfs2_journal_access_di(handle, INODE_CACHE(alloc_inode),
 					 fe_bh, OCFS2_JOURNAL_ACCESS_WRITE);
-	if (status < 0) {
-		mlog_errno(status);
-		goto out_rollback;
-	}
+	if (status < 0)
+		goto out_rollback_bg;
 
 	fe->id2.i_chain.cl_recs[chain].c_blkno = bg->bg_blkno;
 	ocfs2_journal_dirty(handle, fe_bh);
 
-out_rollback:
-	if (status < 0) {
-		fe->id2.i_chain.cl_recs[chain].c_blkno = cpu_to_le64(fe_ptr);
-		bg->bg_next_group = cpu_to_le64(bg_ptr);
-		prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr);
-	}
-
-	if (status)
+out:
+	if (status < 0)
 		mlog_errno(status);
 	return status;
+
+out_rollback_bg:
+	bg->bg_next_group = cpu_to_le64(bg_ptr);
+out_rollback_prev_bg:
+	prev_bg->bg_next_group = cpu_to_le64(prev_bg_ptr);
+	goto out;
 }
 
 static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg,
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 01b85165552..854d80955bf 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -286,10 +286,9 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
 	spin_unlock(&osb->osb_lock);
 
 	out += snprintf(buf + out, len - out,
-			"%10s => Pid: %d  Interval: %lu  Needs: %d\n", "Commit",
+			"%10s => Pid: %d  Interval: %lu\n", "Commit",
 			(osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
-			osb->osb_commit_interval,
-			atomic_read(&osb->needs_checkpoint));
+			osb->osb_commit_interval);
 
 	out += snprintf(buf + out, len - out,
 			"%10s => State: %d  TxnId: %lu  NumTxns: %d\n",
@@ -2154,7 +2153,6 @@ static int ocfs2_initialize_super(struct super_block *sb,
 	}
 
 	init_waitqueue_head(&osb->checkpoint_event);
-	atomic_set(&osb->needs_checkpoint, 0);
 
 	osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
 
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 2e3ea308c14..317ef0abccb 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -2751,7 +2751,6 @@ static int ocfs2_xattr_ibody_set(struct inode *inode,
 {
 	int ret;
 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
-	struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
 	struct ocfs2_xa_loc loc;
 
 	if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
@@ -2759,13 +2758,6 @@ static int ocfs2_xattr_ibody_set(struct inode *inode,
 
 	down_write(&oi->ip_alloc_sem);
 	if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
-		if (!ocfs2_xattr_has_space_inline(inode, di)) {
-			ret = -ENOSPC;
-			goto out;
-		}
-	}
-
-	if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
 		ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt);
 		if (ret) {
 			if (ret != -ENOSPC)
@@ -6499,6 +6491,16 @@ static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args)
 	}
 
 	new_oi = OCFS2_I(args->new_inode);
+	/*
+	 * Adjust extent record count to reserve space for extended attribute.
+	 * Inline data count had been adjusted in ocfs2_duplicate_inline_data().
+	 */
+	if (!(new_oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) &&
+	    !(ocfs2_inode_is_fast_symlink(args->new_inode))) {
+		struct ocfs2_extent_list *el = &new_di->id2.i_list;
+		le16_add_cpu(&el->l_count, -(inline_size /
+					sizeof(struct ocfs2_extent_rec)));
+	}
 	spin_lock(&new_oi->ip_lock);
 	new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL;
 	new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 0a22194e5d5..06ea155e1a5 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -408,7 +408,7 @@ static void elf_kcore_store_hdr(char *bufp, int nphdr, int dataoff)
 	prpsinfo.pr_zomb	= 0;
 
 	strcpy(prpsinfo.pr_fname, "vmlinux");
-	strncpy(prpsinfo.pr_psargs, saved_command_line, ELF_PRARGSZ);
+	strlcpy(prpsinfo.pr_psargs, saved_command_line, sizeof(prpsinfo.pr_psargs));
 
 	nhdr->p_filesz	+= notesize(&notes[1]);
 	bufp = storenote(&notes[1], bufp);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 3e636d864d5..dbf61f6174f 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -11,6 +11,7 @@
 #include <linux/rmap.h>
 #include <linux/swap.h>
 #include <linux/swapops.h>
+#include <linux/mmu_notifier.h>
 
 #include <asm/elf.h>
 #include <asm/uaccess.h>
@@ -688,10 +689,58 @@ const struct file_operations proc_tid_smaps_operations = {
 	.release	= seq_release_private,
 };
 
+/*
+ * We do not want to have constant page-shift bits sitting in
+ * pagemap entries and are about to reuse them some time soon.
+ *
+ * Here's the "migration strategy":
+ * 1. when the system boots these bits remain what they are,
+ *    but a warning about future change is printed in log;
+ * 2. once anyone clears soft-dirty bits via clear_refs file,
+ *    these flag is set to denote, that user is aware of the
+ *    new API and those page-shift bits change their meaning.
+ *    The respective warning is printed in dmesg;
+ * 3. In a couple of releases we will remove all the mentions
+ *    of page-shift in pagemap entries.
+ */
+
+static bool soft_dirty_cleared __read_mostly;
+
+enum clear_refs_types {
+	CLEAR_REFS_ALL = 1,
+	CLEAR_REFS_ANON,
+	CLEAR_REFS_MAPPED,
+	CLEAR_REFS_SOFT_DIRTY,
+	CLEAR_REFS_LAST,
+};
+
+struct clear_refs_private {
+	struct vm_area_struct *vma;
+	enum clear_refs_types type;
+};
+
+static inline void clear_soft_dirty(struct vm_area_struct *vma,
+		unsigned long addr, pte_t *pte)
+{
+#ifdef CONFIG_MEM_SOFT_DIRTY
+	/*
+	 * The soft-dirty tracker uses #PF-s to catch writes
+	 * to pages, so write-protect the pte as well. See the
+	 * Documentation/vm/soft-dirty.txt for full description
+	 * of how soft-dirty works.
+	 */
+	pte_t ptent = *pte;
+	ptent = pte_wrprotect(ptent);
+	ptent = pte_clear_flags(ptent, _PAGE_SOFT_DIRTY);
+	set_pte_at(vma->vm_mm, addr, pte, ptent);
+#endif
+}
+
 static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
 				unsigned long end, struct mm_walk *walk)
 {
-	struct vm_area_struct *vma = walk->private;
+	struct clear_refs_private *cp = walk->private;
+	struct vm_area_struct *vma = cp->vma;
 	pte_t *pte, ptent;
 	spinlock_t *ptl;
 	struct page *page;
@@ -706,6 +755,11 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
 		if (!pte_present(ptent))
 			continue;
 
+		if (cp->type == CLEAR_REFS_SOFT_DIRTY) {
+			clear_soft_dirty(vma, addr, pte);
+			continue;
+		}
+
 		page = vm_normal_page(vma, addr, ptent);
 		if (!page)
 			continue;
@@ -719,10 +773,6 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
 	return 0;
 }
 
-#define CLEAR_REFS_ALL 1
-#define CLEAR_REFS_ANON 2
-#define CLEAR_REFS_MAPPED 3
-
 static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 				size_t count, loff_t *ppos)
 {
@@ -730,7 +780,8 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 	char buffer[PROC_NUMBUF];
 	struct mm_struct *mm;
 	struct vm_area_struct *vma;
-	int type;
+	enum clear_refs_types type;
+	int itype;
 	int rv;
 
 	memset(buffer, 0, sizeof(buffer));
@@ -738,23 +789,37 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 		count = sizeof(buffer) - 1;
 	if (copy_from_user(buffer, buf, count))
 		return -EFAULT;
-	rv = kstrtoint(strstrip(buffer), 10, &type);
+	rv = kstrtoint(strstrip(buffer), 10, &itype);
 	if (rv < 0)
 		return rv;
-	if (type < CLEAR_REFS_ALL || type > CLEAR_REFS_MAPPED)
+	type = (enum clear_refs_types)itype;
+	if (type < CLEAR_REFS_ALL || type >= CLEAR_REFS_LAST)
 		return -EINVAL;
+
+	if (type == CLEAR_REFS_SOFT_DIRTY) {
+		soft_dirty_cleared = true;
+		pr_warn_once("The pagemap bits 55-60 has changed their meaning! "
+				"See the linux/Documentation/vm/pagemap.txt for details.\n");
+	}
+
 	task = get_proc_task(file_inode(file));
 	if (!task)
 		return -ESRCH;
 	mm = get_task_mm(task);
 	if (mm) {
+		struct clear_refs_private cp = {
+			.type = type,
+		};
 		struct mm_walk clear_refs_walk = {
 			.pmd_entry = clear_refs_pte_range,
 			.mm = mm,
+			.private = &cp,
 		};
 		down_read(&mm->mmap_sem);
+		if (type == CLEAR_REFS_SOFT_DIRTY)
+			mmu_notifier_invalidate_range_start(mm, 0, -1);
 		for (vma = mm->mmap; vma; vma = vma->vm_next) {
-			clear_refs_walk.private = vma;
+			cp.vma = vma;
 			if (is_vm_hugetlb_page(vma))
 				continue;
 			/*
@@ -773,6 +838,8 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 			walk_page_range(vma->vm_start, vma->vm_end,
 					&clear_refs_walk);
 		}
+		if (type == CLEAR_REFS_SOFT_DIRTY)
+			mmu_notifier_invalidate_range_end(mm, 0, -1);
 		flush_tlb_mm(mm);
 		up_read(&mm->mmap_sem);
 		mmput(mm);
@@ -794,6 +861,7 @@ typedef struct {
 struct pagemapread {
 	int pos, len;
 	pagemap_entry_t *buffer;
+	bool v2;
 };
 
 #define PAGEMAP_WALK_SIZE	(PMD_SIZE)
@@ -807,14 +875,17 @@ struct pagemapread {
 #define PM_PSHIFT_BITS      6
 #define PM_PSHIFT_OFFSET    (PM_STATUS_OFFSET - PM_PSHIFT_BITS)
 #define PM_PSHIFT_MASK      (((1LL << PM_PSHIFT_BITS) - 1) << PM_PSHIFT_OFFSET)
-#define PM_PSHIFT(x)        (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK)
+#define __PM_PSHIFT(x)      (((u64) (x) << PM_PSHIFT_OFFSET) & PM_PSHIFT_MASK)
 #define PM_PFRAME_MASK      ((1LL << PM_PSHIFT_OFFSET) - 1)
 #define PM_PFRAME(x)        ((x) & PM_PFRAME_MASK)
+/* in "new" pagemap pshift bits are occupied with more status bits */
+#define PM_STATUS2(v2, x)   (__PM_PSHIFT(v2 ? x : PAGE_SHIFT))
 
+#define __PM_SOFT_DIRTY      (1LL)
 #define PM_PRESENT          PM_STATUS(4LL)
 #define PM_SWAP             PM_STATUS(2LL)
 #define PM_FILE             PM_STATUS(1LL)
-#define PM_NOT_PRESENT      PM_PSHIFT(PAGE_SHIFT)
+#define PM_NOT_PRESENT(v2)  PM_STATUS2(v2, 0)
 #define PM_END_OF_BUFFER    1
 
 static inline pagemap_entry_t make_pme(u64 val)
@@ -837,7 +908,7 @@ static int pagemap_pte_hole(unsigned long start, unsigned long end,
 	struct pagemapread *pm = walk->private;
 	unsigned long addr;
 	int err = 0;
-	pagemap_entry_t pme = make_pme(PM_NOT_PRESENT);
+	pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2));
 
 	for (addr = start; addr < end; addr += PAGE_SIZE) {
 		err = add_to_pagemap(addr, &pme, pm);
@@ -847,11 +918,12 @@ static int pagemap_pte_hole(unsigned long start, unsigned long end,
 	return err;
 }
 
-static void pte_to_pagemap_entry(pagemap_entry_t *pme,
+static void pte_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm,
 		struct vm_area_struct *vma, unsigned long addr, pte_t pte)
 {
 	u64 frame, flags;
 	struct page *page = NULL;
+	int flags2 = 0;
 
 	if (pte_present(pte)) {
 		frame = pte_pfn(pte);
@@ -866,19 +938,21 @@ static void pte_to_pagemap_entry(pagemap_entry_t *pme,
 		if (is_migration_entry(entry))
 			page = migration_entry_to_page(entry);
 	} else {
-		*pme = make_pme(PM_NOT_PRESENT);
+		*pme = make_pme(PM_NOT_PRESENT(pm->v2));
 		return;
 	}
 
 	if (page && !PageAnon(page))
 		flags |= PM_FILE;
+	if (pte_soft_dirty(pte))
+		flags2 |= __PM_SOFT_DIRTY;
 
-	*pme = make_pme(PM_PFRAME(frame) | PM_PSHIFT(PAGE_SHIFT) | flags);
+	*pme = make_pme(PM_PFRAME(frame) | PM_STATUS2(pm->v2, flags2) | flags);
 }
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
-					pmd_t pmd, int offset)
+static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm,
+		pmd_t pmd, int offset, int pmd_flags2)
 {
 	/*
 	 * Currently pmd for thp is always present because thp can not be
@@ -887,13 +961,13 @@ static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
 	 */
 	if (pmd_present(pmd))
 		*pme = make_pme(PM_PFRAME(pmd_pfn(pmd) + offset)
-				| PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
+				| PM_STATUS2(pm->v2, pmd_flags2) | PM_PRESENT);
 	else
-		*pme = make_pme(PM_NOT_PRESENT);
+		*pme = make_pme(PM_NOT_PRESENT(pm->v2));
 }
 #else
-static inline void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
-						pmd_t pmd, int offset)
+static inline void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm,
+		pmd_t pmd, int offset, int pmd_flags2)
 {
 }
 #endif
@@ -905,17 +979,20 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 	struct pagemapread *pm = walk->private;
 	pte_t *pte;
 	int err = 0;
-	pagemap_entry_t pme = make_pme(PM_NOT_PRESENT);
+	pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2));
 
 	/* find the first VMA at or above 'addr' */
 	vma = find_vma(walk->mm, addr);
 	if (vma && pmd_trans_huge_lock(pmd, vma) == 1) {
+		int pmd_flags2;
+
+		pmd_flags2 = (pmd_soft_dirty(*pmd) ? __PM_SOFT_DIRTY : 0);
 		for (; addr != end; addr += PAGE_SIZE) {
 			unsigned long offset;
 
 			offset = (addr & ~PAGEMAP_WALK_MASK) >>
 					PAGE_SHIFT;
-			thp_pmd_to_pagemap_entry(&pme, *pmd, offset);
+			thp_pmd_to_pagemap_entry(&pme, pm, *pmd, offset, pmd_flags2);
 			err = add_to_pagemap(addr, &pme, pm);
 			if (err)
 				break;
@@ -932,7 +1009,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 		 * and need a new, higher one */
 		if (vma && (addr >= vma->vm_end)) {
 			vma = find_vma(walk->mm, addr);
-			pme = make_pme(PM_NOT_PRESENT);
+			pme = make_pme(PM_NOT_PRESENT(pm->v2));
 		}
 
 		/* check that 'vma' actually covers this address,
@@ -940,7 +1017,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 		if (vma && (vma->vm_start <= addr) &&
 		    !is_vm_hugetlb_page(vma)) {
 			pte = pte_offset_map(pmd, addr);
-			pte_to_pagemap_entry(&pme, vma, addr, *pte);
+			pte_to_pagemap_entry(&pme, pm, vma, addr, *pte);
 			/* unmap before userspace copy */
 			pte_unmap(pte);
 		}
@@ -955,14 +1032,14 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 }
 
 #ifdef CONFIG_HUGETLB_PAGE
-static void huge_pte_to_pagemap_entry(pagemap_entry_t *pme,
+static void huge_pte_to_pagemap_entry(pagemap_entry_t *pme, struct pagemapread *pm,
 					pte_t pte, int offset)
 {
 	if (pte_present(pte))
 		*pme = make_pme(PM_PFRAME(pte_pfn(pte) + offset)
-				| PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
+				| PM_STATUS2(pm->v2, 0) | PM_PRESENT);
 	else
-		*pme = make_pme(PM_NOT_PRESENT);
+		*pme = make_pme(PM_NOT_PRESENT(pm->v2));
 }
 
 /* This function walks within one hugetlb entry in the single call */
@@ -976,7 +1053,7 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
 
 	for (; addr != end; addr += PAGE_SIZE) {
 		int offset = (addr & ~hmask) >> PAGE_SHIFT;
-		huge_pte_to_pagemap_entry(&pme, *pte, offset);
+		huge_pte_to_pagemap_entry(&pme, pm, *pte, offset);
 		err = add_to_pagemap(addr, &pme, pm);
 		if (err)
 			return err;
@@ -1038,6 +1115,7 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
 	if (!count)
 		goto out_task;
 
+	pm.v2 = soft_dirty_cleared;
 	pm.len = PM_ENTRY_BYTES * (PAGEMAP_WALK_SIZE >> PAGE_SHIFT);
 	pm.buffer = kmalloc(pm.len, GFP_TEMPORARY);
 	ret = -ENOMEM;
@@ -1110,9 +1188,18 @@ out:
 	return ret;
 }
 
+static int pagemap_open(struct inode *inode, struct file *file)
+{
+	pr_warn_once("Bits 55-60 of /proc/PID/pagemap entries are about "
+			"to stop being page-shift some time soon. See the "
+			"linux/Documentation/vm/pagemap.txt for details.\n");
+	return 0;
+}
+
 const struct file_operations proc_pagemap_operations = {
 	.llseek		= mem_lseek, /* borrow this */
 	.read		= pagemap_read,
+	.open		= pagemap_open,
 };
 #endif /* CONFIG_PROC_PAGE_MONITOR */
 
diff --git a/fs/proc/uptime.c b/fs/proc/uptime.c
index 9610ac772d7..06189462590 100644
--- a/fs/proc/uptime.c
+++ b/fs/proc/uptime.c
@@ -20,8 +20,7 @@ static int uptime_proc_show(struct seq_file *m, void *v)
 	for_each_possible_cpu(i)
 		idletime += (__force u64) kcpustat_cpu(i).cpustat[CPUTIME_IDLE];
 
-	do_posix_clock_monotonic_gettime(&uptime);
-	monotonic_to_bootbased(&uptime);
+	get_monotonic_boottime(&uptime);
 	nsec = cputime64_to_jiffies64(idletime) * TICK_NSEC;
 	idle.tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
 	idle.tv_nsec = rem;
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 17f7e080d7f..28503172f2e 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -20,6 +20,7 @@
 #include <linux/init.h>
 #include <linux/crash_dump.h>
 #include <linux/list.h>
+#include <linux/vmalloc.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include "internal.h"
@@ -32,6 +33,10 @@ static LIST_HEAD(vmcore_list);
 /* Stores the pointer to the buffer containing kernel elf core headers. */
 static char *elfcorebuf;
 static size_t elfcorebuf_sz;
+static size_t elfcorebuf_sz_orig;
+
+static char *elfnotes_buf;
+static size_t elfnotes_sz;
 
 /* Total size of vmcore file. */
 static u64 vmcore_size;
@@ -118,27 +123,6 @@ static ssize_t read_from_oldmem(char *buf, size_t count,
 	return read;
 }
 
-/* Maps vmcore file offset to respective physical address in memroy. */
-static u64 map_offset_to_paddr(loff_t offset, struct list_head *vc_list,
-					struct vmcore **m_ptr)
-{
-	struct vmcore *m;
-	u64 paddr;
-
-	list_for_each_entry(m, vc_list, list) {
-		u64 start, end;
-		start = m->offset;
-		end = m->offset + m->size - 1;
-		if (offset >= start && offset <= end) {
-			paddr = m->paddr + offset - start;
-			*m_ptr = m;
-			return paddr;
-		}
-	}
-	*m_ptr = NULL;
-	return 0;
-}
-
 /* Read from the ELF header and then the crash dump. On error, negative value is
  * returned otherwise number of bytes read are returned.
  */
@@ -147,8 +131,8 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
 {
 	ssize_t acc = 0, tmp;
 	size_t tsz;
-	u64 start, nr_bytes;
-	struct vmcore *curr_m = NULL;
+	u64 start;
+	struct vmcore *m = NULL;
 
 	if (buflen == 0 || *fpos >= vmcore_size)
 		return 0;
@@ -159,9 +143,7 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
 
 	/* Read ELF core header */
 	if (*fpos < elfcorebuf_sz) {
-		tsz = elfcorebuf_sz - *fpos;
-		if (buflen < tsz)
-			tsz = buflen;
+		tsz = min(elfcorebuf_sz - (size_t)*fpos, buflen);
 		if (copy_to_user(buffer, elfcorebuf + *fpos, tsz))
 			return -EFAULT;
 		buflen -= tsz;
@@ -174,39 +156,161 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer,
 			return acc;
 	}
 
-	start = map_offset_to_paddr(*fpos, &vmcore_list, &curr_m);
-	if (!curr_m)
-        	return -EINVAL;
-
-	while (buflen) {
-		tsz = min_t(size_t, buflen, PAGE_SIZE - (start & ~PAGE_MASK));
+	/* Read Elf note segment */
+	if (*fpos < elfcorebuf_sz + elfnotes_sz) {
+		void *kaddr;
 
-		/* Calculate left bytes in current memory segment. */
-		nr_bytes = (curr_m->size - (start - curr_m->paddr));
-		if (tsz > nr_bytes)
-			tsz = nr_bytes;
-
-		tmp = read_from_oldmem(buffer, tsz, &start, 1);
-		if (tmp < 0)
-			return tmp;
+		tsz = min(elfcorebuf_sz + elfnotes_sz - (size_t)*fpos, buflen);
+		kaddr = elfnotes_buf + *fpos - elfcorebuf_sz;
+		if (copy_to_user(buffer, kaddr, tsz))
+			return -EFAULT;
 		buflen -= tsz;
 		*fpos += tsz;
 		buffer += tsz;
 		acc += tsz;
-		if (start >= (curr_m->paddr + curr_m->size)) {
-			if (curr_m->list.next == &vmcore_list)
-				return acc;	/*EOF*/
-			curr_m = list_entry(curr_m->list.next,
-						struct vmcore, list);
-			start = curr_m->paddr;
+
+		/* leave now if filled buffer already */
+		if (buflen == 0)
+			return acc;
+	}
+
+	list_for_each_entry(m, &vmcore_list, list) {
+		if (*fpos < m->offset + m->size) {
+			tsz = min_t(size_t, m->offset + m->size - *fpos, buflen);
+			start = m->paddr + *fpos - m->offset;
+			tmp = read_from_oldmem(buffer, tsz, &start, 1);
+			if (tmp < 0)
+				return tmp;
+			buflen -= tsz;
+			*fpos += tsz;
+			buffer += tsz;
+			acc += tsz;
+
+			/* leave now if filled buffer already */
+			if (buflen == 0)
+				return acc;
 		}
 	}
+
 	return acc;
 }
 
+/**
+ * alloc_elfnotes_buf - allocate buffer for ELF note segment in
+ *                      vmalloc memory
+ *
+ * @notes_sz: size of buffer
+ *
+ * If CONFIG_MMU is defined, use vmalloc_user() to allow users to mmap
+ * the buffer to user-space by means of remap_vmalloc_range().
+ *
+ * If CONFIG_MMU is not defined, use vzalloc() since mmap_vmcore() is
+ * disabled and there's no need to allow users to mmap the buffer.
+ */
+static inline char *alloc_elfnotes_buf(size_t notes_sz)
+{
+#ifdef CONFIG_MMU
+	return vmalloc_user(notes_sz);
+#else
+	return vzalloc(notes_sz);
+#endif
+}
+
+/*
+ * Disable mmap_vmcore() if CONFIG_MMU is not defined. MMU is
+ * essential for mmap_vmcore() in order to map physically
+ * non-contiguous objects (ELF header, ELF note segment and memory
+ * regions in the 1st kernel pointed to by PT_LOAD entries) into
+ * virtually contiguous user-space in ELF layout.
+ */
+#ifdef CONFIG_MMU
+static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
+{
+	size_t size = vma->vm_end - vma->vm_start;
+	u64 start, end, len, tsz;
+	struct vmcore *m;
+
+	start = (u64)vma->vm_pgoff << PAGE_SHIFT;
+	end = start + size;
+
+	if (size > vmcore_size || end > vmcore_size)
+		return -EINVAL;
+
+	if (vma->vm_flags & (VM_WRITE | VM_EXEC))
+		return -EPERM;
+
+	vma->vm_flags &= ~(VM_MAYWRITE | VM_MAYEXEC);
+	vma->vm_flags |= VM_MIXEDMAP;
+
+	len = 0;
+
+	if (start < elfcorebuf_sz) {
+		u64 pfn;
+
+		tsz = min(elfcorebuf_sz - (size_t)start, size);
+		pfn = __pa(elfcorebuf + start) >> PAGE_SHIFT;
+		if (remap_pfn_range(vma, vma->vm_start, pfn, tsz,
+				    vma->vm_page_prot))
+			return -EAGAIN;
+		size -= tsz;
+		start += tsz;
+		len += tsz;
+
+		if (size == 0)
+			return 0;
+	}
+
+	if (start < elfcorebuf_sz + elfnotes_sz) {
+		void *kaddr;
+
+		tsz = min(elfcorebuf_sz + elfnotes_sz - (size_t)start, size);
+		kaddr = elfnotes_buf + start - elfcorebuf_sz;
+		if (remap_vmalloc_range_partial(vma, vma->vm_start + len,
+						kaddr, tsz))
+			goto fail;
+		size -= tsz;
+		start += tsz;
+		len += tsz;
+
+		if (size == 0)
+			return 0;
+	}
+
+	list_for_each_entry(m, &vmcore_list, list) {
+		if (start < m->offset + m->size) {
+			u64 paddr = 0;
+
+			tsz = min_t(size_t, m->offset + m->size - start, size);
+			paddr = m->paddr + start - m->offset;
+			if (remap_pfn_range(vma, vma->vm_start + len,
+					    paddr >> PAGE_SHIFT, tsz,
+					    vma->vm_page_prot))
+				goto fail;
+			size -= tsz;
+			start += tsz;
+			len += tsz;
+
+			if (size == 0)
+				return 0;
+		}
+	}
+
+	return 0;
+fail:
+	do_munmap(vma->vm_mm, vma->vm_start, len);
+	return -EAGAIN;
+}
+#else
+static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
+{
+	return -ENOSYS;
+}
+#endif
+
 static const struct file_operations proc_vmcore_operations = {
 	.read		= read_vmcore,
 	.llseek		= default_llseek,
+	.mmap		= mmap_vmcore,
 };
 
 static struct vmcore* __init get_new_element(void)
@@ -214,61 +318,40 @@ static struct vmcore* __init get_new_element(void)
 	return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
 }
 
-static u64 __init get_vmcore_size_elf64(char *elfptr)
+static u64 __init get_vmcore_size(size_t elfsz, size_t elfnotesegsz,
+				  struct list_head *vc_list)
 {
-	int i;
-	u64 size;
-	Elf64_Ehdr *ehdr_ptr;
-	Elf64_Phdr *phdr_ptr;
-
-	ehdr_ptr = (Elf64_Ehdr *)elfptr;
-	phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr));
-	size = sizeof(Elf64_Ehdr) + ((ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr));
-	for (i = 0; i < ehdr_ptr->e_phnum; i++) {
-		size += phdr_ptr->p_memsz;
-		phdr_ptr++;
-	}
-	return size;
-}
-
-static u64 __init get_vmcore_size_elf32(char *elfptr)
-{
-	int i;
 	u64 size;
-	Elf32_Ehdr *ehdr_ptr;
-	Elf32_Phdr *phdr_ptr;
+	struct vmcore *m;
 
-	ehdr_ptr = (Elf32_Ehdr *)elfptr;
-	phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr));
-	size = sizeof(Elf32_Ehdr) + ((ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr));
-	for (i = 0; i < ehdr_ptr->e_phnum; i++) {
-		size += phdr_ptr->p_memsz;
-		phdr_ptr++;
+	size = elfsz + elfnotesegsz;
+	list_for_each_entry(m, vc_list, list) {
+		size += m->size;
 	}
 	return size;
 }
 
-/* Merges all the PT_NOTE headers into one. */
-static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
-						struct list_head *vc_list)
+/**
+ * update_note_header_size_elf64 - update p_memsz member of each PT_NOTE entry
+ *
+ * @ehdr_ptr: ELF header
+ *
+ * This function updates p_memsz member of each PT_NOTE entry in the
+ * program header table pointed to by @ehdr_ptr to real size of ELF
+ * note segment.
+ */
+static int __init update_note_header_size_elf64(const Elf64_Ehdr *ehdr_ptr)
 {
-	int i, nr_ptnote=0, rc=0;
-	char *tmp;
-	Elf64_Ehdr *ehdr_ptr;
-	Elf64_Phdr phdr, *phdr_ptr;
+	int i, rc=0;
+	Elf64_Phdr *phdr_ptr;
 	Elf64_Nhdr *nhdr_ptr;
-	u64 phdr_sz = 0, note_off;
 
-	ehdr_ptr = (Elf64_Ehdr *)elfptr;
-	phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr));
+	phdr_ptr = (Elf64_Phdr *)(ehdr_ptr + 1);
 	for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
-		int j;
 		void *notes_section;
-		struct vmcore *new;
 		u64 offset, max_sz, sz, real_sz = 0;
 		if (phdr_ptr->p_type != PT_NOTE)
 			continue;
-		nr_ptnote++;
 		max_sz = phdr_ptr->p_memsz;
 		offset = phdr_ptr->p_offset;
 		notes_section = kmalloc(max_sz, GFP_KERNEL);
@@ -280,7 +363,7 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
 			return rc;
 		}
 		nhdr_ptr = notes_section;
-		for (j = 0; j < max_sz; j += sz) {
+		while (real_sz < max_sz) {
 			if (nhdr_ptr->n_namesz == 0)
 				break;
 			sz = sizeof(Elf64_Nhdr) +
@@ -289,26 +372,122 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
 			real_sz += sz;
 			nhdr_ptr = (Elf64_Nhdr*)((char*)nhdr_ptr + sz);
 		}
-
-		/* Add this contiguous chunk of notes section to vmcore list.*/
-		new = get_new_element();
-		if (!new) {
-			kfree(notes_section);
-			return -ENOMEM;
-		}
-		new->paddr = phdr_ptr->p_offset;
-		new->size = real_sz;
-		list_add_tail(&new->list, vc_list);
-		phdr_sz += real_sz;
 		kfree(notes_section);
+		phdr_ptr->p_memsz = real_sz;
+	}
+
+	return 0;
+}
+
+/**
+ * get_note_number_and_size_elf64 - get the number of PT_NOTE program
+ * headers and sum of real size of their ELF note segment headers and
+ * data.
+ *
+ * @ehdr_ptr: ELF header
+ * @nr_ptnote: buffer for the number of PT_NOTE program headers
+ * @sz_ptnote: buffer for size of unique PT_NOTE program header
+ *
+ * This function is used to merge multiple PT_NOTE program headers
+ * into a unique single one. The resulting unique entry will have
+ * @sz_ptnote in its phdr->p_mem.
+ *
+ * It is assumed that program headers with PT_NOTE type pointed to by
+ * @ehdr_ptr has already been updated by update_note_header_size_elf64
+ * and each of PT_NOTE program headers has actual ELF note segment
+ * size in its p_memsz member.
+ */
+static int __init get_note_number_and_size_elf64(const Elf64_Ehdr *ehdr_ptr,
+						 int *nr_ptnote, u64 *sz_ptnote)
+{
+	int i;
+	Elf64_Phdr *phdr_ptr;
+
+	*nr_ptnote = *sz_ptnote = 0;
+
+	phdr_ptr = (Elf64_Phdr *)(ehdr_ptr + 1);
+	for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+		if (phdr_ptr->p_type != PT_NOTE)
+			continue;
+		*nr_ptnote += 1;
+		*sz_ptnote += phdr_ptr->p_memsz;
+	}
+
+	return 0;
+}
+
+/**
+ * copy_notes_elf64 - copy ELF note segments in a given buffer
+ *
+ * @ehdr_ptr: ELF header
+ * @notes_buf: buffer into which ELF note segments are copied
+ *
+ * This function is used to copy ELF note segment in the 1st kernel
+ * into the buffer @notes_buf in the 2nd kernel. It is assumed that
+ * size of the buffer @notes_buf is equal to or larger than sum of the
+ * real ELF note segment headers and data.
+ *
+ * It is assumed that program headers with PT_NOTE type pointed to by
+ * @ehdr_ptr has already been updated by update_note_header_size_elf64
+ * and each of PT_NOTE program headers has actual ELF note segment
+ * size in its p_memsz member.
+ */
+static int __init copy_notes_elf64(const Elf64_Ehdr *ehdr_ptr, char *notes_buf)
+{
+	int i, rc=0;
+	Elf64_Phdr *phdr_ptr;
+
+	phdr_ptr = (Elf64_Phdr*)(ehdr_ptr + 1);
+
+	for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+		u64 offset;
+		if (phdr_ptr->p_type != PT_NOTE)
+			continue;
+		offset = phdr_ptr->p_offset;
+		rc = read_from_oldmem(notes_buf, phdr_ptr->p_memsz, &offset, 0);
+		if (rc < 0)
+			return rc;
+		notes_buf += phdr_ptr->p_memsz;
 	}
 
+	return 0;
+}
+
+/* Merges all the PT_NOTE headers into one. */
+static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
+					   char **notes_buf, size_t *notes_sz)
+{
+	int i, nr_ptnote=0, rc=0;
+	char *tmp;
+	Elf64_Ehdr *ehdr_ptr;
+	Elf64_Phdr phdr;
+	u64 phdr_sz = 0, note_off;
+
+	ehdr_ptr = (Elf64_Ehdr *)elfptr;
+
+	rc = update_note_header_size_elf64(ehdr_ptr);
+	if (rc < 0)
+		return rc;
+
+	rc = get_note_number_and_size_elf64(ehdr_ptr, &nr_ptnote, &phdr_sz);
+	if (rc < 0)
+		return rc;
+
+	*notes_sz = roundup(phdr_sz, PAGE_SIZE);
+	*notes_buf = alloc_elfnotes_buf(*notes_sz);
+	if (!*notes_buf)
+		return -ENOMEM;
+
+	rc = copy_notes_elf64(ehdr_ptr, *notes_buf);
+	if (rc < 0)
+		return rc;
+
 	/* Prepare merged PT_NOTE program header. */
 	phdr.p_type    = PT_NOTE;
 	phdr.p_flags   = 0;
 	note_off = sizeof(Elf64_Ehdr) +
 			(ehdr_ptr->e_phnum - nr_ptnote +1) * sizeof(Elf64_Phdr);
-	phdr.p_offset  = note_off;
+	phdr.p_offset  = roundup(note_off, PAGE_SIZE);
 	phdr.p_vaddr   = phdr.p_paddr = 0;
 	phdr.p_filesz  = phdr.p_memsz = phdr_sz;
 	phdr.p_align   = 0;
@@ -322,6 +501,8 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
 	i = (nr_ptnote - 1) * sizeof(Elf64_Phdr);
 	*elfsz = *elfsz - i;
 	memmove(tmp, tmp+i, ((*elfsz)-sizeof(Elf64_Ehdr)-sizeof(Elf64_Phdr)));
+	memset(elfptr + *elfsz, 0, i);
+	*elfsz = roundup(*elfsz, PAGE_SIZE);
 
 	/* Modify e_phnum to reflect merged headers. */
 	ehdr_ptr->e_phnum = ehdr_ptr->e_phnum - nr_ptnote + 1;
@@ -329,27 +510,27 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz,
 	return 0;
 }
 
-/* Merges all the PT_NOTE headers into one. */
-static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
-						struct list_head *vc_list)
+/**
+ * update_note_header_size_elf32 - update p_memsz member of each PT_NOTE entry
+ *
+ * @ehdr_ptr: ELF header
+ *
+ * This function updates p_memsz member of each PT_NOTE entry in the
+ * program header table pointed to by @ehdr_ptr to real size of ELF
+ * note segment.
+ */
+static int __init update_note_header_size_elf32(const Elf32_Ehdr *ehdr_ptr)
 {
-	int i, nr_ptnote=0, rc=0;
-	char *tmp;
-	Elf32_Ehdr *ehdr_ptr;
-	Elf32_Phdr phdr, *phdr_ptr;
+	int i, rc=0;
+	Elf32_Phdr *phdr_ptr;
 	Elf32_Nhdr *nhdr_ptr;
-	u64 phdr_sz = 0, note_off;
 
-	ehdr_ptr = (Elf32_Ehdr *)elfptr;
-	phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr));
+	phdr_ptr = (Elf32_Phdr *)(ehdr_ptr + 1);
 	for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
-		int j;
 		void *notes_section;
-		struct vmcore *new;
 		u64 offset, max_sz, sz, real_sz = 0;
 		if (phdr_ptr->p_type != PT_NOTE)
 			continue;
-		nr_ptnote++;
 		max_sz = phdr_ptr->p_memsz;
 		offset = phdr_ptr->p_offset;
 		notes_section = kmalloc(max_sz, GFP_KERNEL);
@@ -361,7 +542,7 @@ static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
 			return rc;
 		}
 		nhdr_ptr = notes_section;
-		for (j = 0; j < max_sz; j += sz) {
+		while (real_sz < max_sz) {
 			if (nhdr_ptr->n_namesz == 0)
 				break;
 			sz = sizeof(Elf32_Nhdr) +
@@ -370,26 +551,122 @@ static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
 			real_sz += sz;
 			nhdr_ptr = (Elf32_Nhdr*)((char*)nhdr_ptr + sz);
 		}
-
-		/* Add this contiguous chunk of notes section to vmcore list.*/
-		new = get_new_element();
-		if (!new) {
-			kfree(notes_section);
-			return -ENOMEM;
-		}
-		new->paddr = phdr_ptr->p_offset;
-		new->size = real_sz;
-		list_add_tail(&new->list, vc_list);
-		phdr_sz += real_sz;
 		kfree(notes_section);
+		phdr_ptr->p_memsz = real_sz;
+	}
+
+	return 0;
+}
+
+/**
+ * get_note_number_and_size_elf32 - get the number of PT_NOTE program
+ * headers and sum of real size of their ELF note segment headers and
+ * data.
+ *
+ * @ehdr_ptr: ELF header
+ * @nr_ptnote: buffer for the number of PT_NOTE program headers
+ * @sz_ptnote: buffer for size of unique PT_NOTE program header
+ *
+ * This function is used to merge multiple PT_NOTE program headers
+ * into a unique single one. The resulting unique entry will have
+ * @sz_ptnote in its phdr->p_mem.
+ *
+ * It is assumed that program headers with PT_NOTE type pointed to by
+ * @ehdr_ptr has already been updated by update_note_header_size_elf32
+ * and each of PT_NOTE program headers has actual ELF note segment
+ * size in its p_memsz member.
+ */
+static int __init get_note_number_and_size_elf32(const Elf32_Ehdr *ehdr_ptr,
+						 int *nr_ptnote, u64 *sz_ptnote)
+{
+	int i;
+	Elf32_Phdr *phdr_ptr;
+
+	*nr_ptnote = *sz_ptnote = 0;
+
+	phdr_ptr = (Elf32_Phdr *)(ehdr_ptr + 1);
+	for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+		if (phdr_ptr->p_type != PT_NOTE)
+			continue;
+		*nr_ptnote += 1;
+		*sz_ptnote += phdr_ptr->p_memsz;
+	}
+
+	return 0;
+}
+
+/**
+ * copy_notes_elf32 - copy ELF note segments in a given buffer
+ *
+ * @ehdr_ptr: ELF header
+ * @notes_buf: buffer into which ELF note segments are copied
+ *
+ * This function is used to copy ELF note segment in the 1st kernel
+ * into the buffer @notes_buf in the 2nd kernel. It is assumed that
+ * size of the buffer @notes_buf is equal to or larger than sum of the
+ * real ELF note segment headers and data.
+ *
+ * It is assumed that program headers with PT_NOTE type pointed to by
+ * @ehdr_ptr has already been updated by update_note_header_size_elf32
+ * and each of PT_NOTE program headers has actual ELF note segment
+ * size in its p_memsz member.
+ */
+static int __init copy_notes_elf32(const Elf32_Ehdr *ehdr_ptr, char *notes_buf)
+{
+	int i, rc=0;
+	Elf32_Phdr *phdr_ptr;
+
+	phdr_ptr = (Elf32_Phdr*)(ehdr_ptr + 1);
+
+	for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+		u64 offset;
+		if (phdr_ptr->p_type != PT_NOTE)
+			continue;
+		offset = phdr_ptr->p_offset;
+		rc = read_from_oldmem(notes_buf, phdr_ptr->p_memsz, &offset, 0);
+		if (rc < 0)
+			return rc;
+		notes_buf += phdr_ptr->p_memsz;
 	}
 
+	return 0;
+}
+
+/* Merges all the PT_NOTE headers into one. */
+static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
+					   char **notes_buf, size_t *notes_sz)
+{
+	int i, nr_ptnote=0, rc=0;
+	char *tmp;
+	Elf32_Ehdr *ehdr_ptr;
+	Elf32_Phdr phdr;
+	u64 phdr_sz = 0, note_off;
+
+	ehdr_ptr = (Elf32_Ehdr *)elfptr;
+
+	rc = update_note_header_size_elf32(ehdr_ptr);
+	if (rc < 0)
+		return rc;
+
+	rc = get_note_number_and_size_elf32(ehdr_ptr, &nr_ptnote, &phdr_sz);
+	if (rc < 0)
+		return rc;
+
+	*notes_sz = roundup(phdr_sz, PAGE_SIZE);
+	*notes_buf = alloc_elfnotes_buf(*notes_sz);
+	if (!*notes_buf)
+		return -ENOMEM;
+
+	rc = copy_notes_elf32(ehdr_ptr, *notes_buf);
+	if (rc < 0)
+		return rc;
+
 	/* Prepare merged PT_NOTE program header. */
 	phdr.p_type    = PT_NOTE;
 	phdr.p_flags   = 0;
 	note_off = sizeof(Elf32_Ehdr) +
 			(ehdr_ptr->e_phnum - nr_ptnote +1) * sizeof(Elf32_Phdr);
-	phdr.p_offset  = note_off;
+	phdr.p_offset  = roundup(note_off, PAGE_SIZE);
 	phdr.p_vaddr   = phdr.p_paddr = 0;
 	phdr.p_filesz  = phdr.p_memsz = phdr_sz;
 	phdr.p_align   = 0;
@@ -403,6 +680,8 @@ static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
 	i = (nr_ptnote - 1) * sizeof(Elf32_Phdr);
 	*elfsz = *elfsz - i;
 	memmove(tmp, tmp+i, ((*elfsz)-sizeof(Elf32_Ehdr)-sizeof(Elf32_Phdr)));
+	memset(elfptr + *elfsz, 0, i);
+	*elfsz = roundup(*elfsz, PAGE_SIZE);
 
 	/* Modify e_phnum to reflect merged headers. */
 	ehdr_ptr->e_phnum = ehdr_ptr->e_phnum - nr_ptnote + 1;
@@ -414,6 +693,7 @@ static int __init merge_note_headers_elf32(char *elfptr, size_t *elfsz,
  * the new offset fields of exported program headers. */
 static int __init process_ptload_program_headers_elf64(char *elfptr,
 						size_t elfsz,
+						size_t elfnotes_sz,
 						struct list_head *vc_list)
 {
 	int i;
@@ -425,32 +705,38 @@ static int __init process_ptload_program_headers_elf64(char *elfptr,
 	ehdr_ptr = (Elf64_Ehdr *)elfptr;
 	phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr)); /* PT_NOTE hdr */
 
-	/* First program header is PT_NOTE header. */
-	vmcore_off = sizeof(Elf64_Ehdr) +
-			(ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr) +
-			phdr_ptr->p_memsz; /* Note sections */
+	/* Skip Elf header, program headers and Elf note segment. */
+	vmcore_off = elfsz + elfnotes_sz;
 
 	for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+		u64 paddr, start, end, size;
+
 		if (phdr_ptr->p_type != PT_LOAD)
 			continue;
 
+		paddr = phdr_ptr->p_offset;
+		start = rounddown(paddr, PAGE_SIZE);
+		end = roundup(paddr + phdr_ptr->p_memsz, PAGE_SIZE);
+		size = end - start;
+
 		/* Add this contiguous chunk of memory to vmcore list.*/
 		new = get_new_element();
 		if (!new)
 			return -ENOMEM;
-		new->paddr = phdr_ptr->p_offset;
-		new->size = phdr_ptr->p_memsz;
+		new->paddr = start;
+		new->size = size;
 		list_add_tail(&new->list, vc_list);
 
 		/* Update the program header offset. */
-		phdr_ptr->p_offset = vmcore_off;
-		vmcore_off = vmcore_off + phdr_ptr->p_memsz;
+		phdr_ptr->p_offset = vmcore_off + (paddr - start);
+		vmcore_off = vmcore_off + size;
 	}
 	return 0;
 }
 
 static int __init process_ptload_program_headers_elf32(char *elfptr,
 						size_t elfsz,
+						size_t elfnotes_sz,
 						struct list_head *vc_list)
 {
 	int i;
@@ -462,43 +748,44 @@ static int __init process_ptload_program_headers_elf32(char *elfptr,
 	ehdr_ptr = (Elf32_Ehdr *)elfptr;
 	phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr)); /* PT_NOTE hdr */
 
-	/* First program header is PT_NOTE header. */
-	vmcore_off = sizeof(Elf32_Ehdr) +
-			(ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr) +
-			phdr_ptr->p_memsz; /* Note sections */
+	/* Skip Elf header, program headers and Elf note segment. */
+	vmcore_off = elfsz + elfnotes_sz;
 
 	for (i = 0; i < ehdr_ptr->e_phnum; i++, phdr_ptr++) {
+		u64 paddr, start, end, size;
+
 		if (phdr_ptr->p_type != PT_LOAD)
 			continue;
 
+		paddr = phdr_ptr->p_offset;
+		start = rounddown(paddr, PAGE_SIZE);
+		end = roundup(paddr + phdr_ptr->p_memsz, PAGE_SIZE);
+		size = end - start;
+
 		/* Add this contiguous chunk of memory to vmcore list.*/
 		new = get_new_element();
 		if (!new)
 			return -ENOMEM;
-		new->paddr = phdr_ptr->p_offset;
-		new->size = phdr_ptr->p_memsz;
+		new->paddr = start;
+		new->size = size;
 		list_add_tail(&new->list, vc_list);
 
 		/* Update the program header offset */
-		phdr_ptr->p_offset = vmcore_off;
-		vmcore_off = vmcore_off + phdr_ptr->p_memsz;
+		phdr_ptr->p_offset = vmcore_off + (paddr - start);
+		vmcore_off = vmcore_off + size;
 	}
 	return 0;
 }
 
 /* Sets offset fields of vmcore elements. */
-static void __init set_vmcore_list_offsets_elf64(char *elfptr,
-						struct list_head *vc_list)
+static void __init set_vmcore_list_offsets(size_t elfsz, size_t elfnotes_sz,
+					   struct list_head *vc_list)
 {
 	loff_t vmcore_off;
-	Elf64_Ehdr *ehdr_ptr;
 	struct vmcore *m;
 
-	ehdr_ptr = (Elf64_Ehdr *)elfptr;
-
-	/* Skip Elf header and program headers. */
-	vmcore_off = sizeof(Elf64_Ehdr) +
-			(ehdr_ptr->e_phnum) * sizeof(Elf64_Phdr);
+	/* Skip Elf header, program headers and Elf note segment. */
+	vmcore_off = elfsz + elfnotes_sz;
 
 	list_for_each_entry(m, vc_list, list) {
 		m->offset = vmcore_off;
@@ -506,24 +793,12 @@ static void __init set_vmcore_list_offsets_elf64(char *elfptr,
 	}
 }
 
-/* Sets offset fields of vmcore elements. */
-static void __init set_vmcore_list_offsets_elf32(char *elfptr,
-						struct list_head *vc_list)
+static void free_elfcorebuf(void)
 {
-	loff_t vmcore_off;
-	Elf32_Ehdr *ehdr_ptr;
-	struct vmcore *m;
-
-	ehdr_ptr = (Elf32_Ehdr *)elfptr;
-
-	/* Skip Elf header and program headers. */
-	vmcore_off = sizeof(Elf32_Ehdr) +
-			(ehdr_ptr->e_phnum) * sizeof(Elf32_Phdr);
-
-	list_for_each_entry(m, vc_list, list) {
-		m->offset = vmcore_off;
-		vmcore_off += m->size;
-	}
+	free_pages((unsigned long)elfcorebuf, get_order(elfcorebuf_sz_orig));
+	elfcorebuf = NULL;
+	vfree(elfnotes_buf);
+	elfnotes_buf = NULL;
 }
 
 static int __init parse_crash_elf64_headers(void)
@@ -554,31 +829,32 @@ static int __init parse_crash_elf64_headers(void)
 	}
 
 	/* Read in all elf headers. */
-	elfcorebuf_sz = sizeof(Elf64_Ehdr) + ehdr.e_phnum * sizeof(Elf64_Phdr);
-	elfcorebuf = kmalloc(elfcorebuf_sz, GFP_KERNEL);
+	elfcorebuf_sz_orig = sizeof(Elf64_Ehdr) +
+				ehdr.e_phnum * sizeof(Elf64_Phdr);
+	elfcorebuf_sz = elfcorebuf_sz_orig;
+	elfcorebuf = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+					      get_order(elfcorebuf_sz_orig));
 	if (!elfcorebuf)
 		return -ENOMEM;
 	addr = elfcorehdr_addr;
-	rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz, &addr, 0);
-	if (rc < 0) {
-		kfree(elfcorebuf);
-		return rc;
-	}
+	rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz_orig, &addr, 0);
+	if (rc < 0)
+		goto fail;
 
 	/* Merge all PT_NOTE headers into one. */
-	rc = merge_note_headers_elf64(elfcorebuf, &elfcorebuf_sz, &vmcore_list);
-	if (rc) {
-		kfree(elfcorebuf);
-		return rc;
-	}
+	rc = merge_note_headers_elf64(elfcorebuf, &elfcorebuf_sz,
+				      &elfnotes_buf, &elfnotes_sz);
+	if (rc)
+		goto fail;
 	rc = process_ptload_program_headers_elf64(elfcorebuf, elfcorebuf_sz,
-							&vmcore_list);
-	if (rc) {
-		kfree(elfcorebuf);
-		return rc;
-	}
-	set_vmcore_list_offsets_elf64(elfcorebuf, &vmcore_list);
+						  elfnotes_sz, &vmcore_list);
+	if (rc)
+		goto fail;
+	set_vmcore_list_offsets(elfcorebuf_sz, elfnotes_sz, &vmcore_list);
 	return 0;
+fail:
+	free_elfcorebuf();
+	return rc;
 }
 
 static int __init parse_crash_elf32_headers(void)
@@ -609,31 +885,31 @@ static int __init parse_crash_elf32_headers(void)
 	}
 
 	/* Read in all elf headers. */
-	elfcorebuf_sz = sizeof(Elf32_Ehdr) + ehdr.e_phnum * sizeof(Elf32_Phdr);
-	elfcorebuf = kmalloc(elfcorebuf_sz, GFP_KERNEL);
+	elfcorebuf_sz_orig = sizeof(Elf32_Ehdr) + ehdr.e_phnum * sizeof(Elf32_Phdr);
+	elfcorebuf_sz = elfcorebuf_sz_orig;
+	elfcorebuf = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+					      get_order(elfcorebuf_sz_orig));
 	if (!elfcorebuf)
 		return -ENOMEM;
 	addr = elfcorehdr_addr;
-	rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz, &addr, 0);
-	if (rc < 0) {
-		kfree(elfcorebuf);
-		return rc;
-	}
+	rc = read_from_oldmem(elfcorebuf, elfcorebuf_sz_orig, &addr, 0);
+	if (rc < 0)
+		goto fail;
 
 	/* Merge all PT_NOTE headers into one. */
-	rc = merge_note_headers_elf32(elfcorebuf, &elfcorebuf_sz, &vmcore_list);
-	if (rc) {
-		kfree(elfcorebuf);
-		return rc;
-	}
+	rc = merge_note_headers_elf32(elfcorebuf, &elfcorebuf_sz,
+				      &elfnotes_buf, &elfnotes_sz);
+	if (rc)
+		goto fail;
 	rc = process_ptload_program_headers_elf32(elfcorebuf, elfcorebuf_sz,
-								&vmcore_list);
-	if (rc) {
-		kfree(elfcorebuf);
-		return rc;
-	}
-	set_vmcore_list_offsets_elf32(elfcorebuf, &vmcore_list);
+						  elfnotes_sz, &vmcore_list);
+	if (rc)
+		goto fail;
+	set_vmcore_list_offsets(elfcorebuf_sz, elfnotes_sz, &vmcore_list);
 	return 0;
+fail:
+	free_elfcorebuf();
+	return rc;
 }
 
 static int __init parse_crash_elf_headers(void)
@@ -655,20 +931,19 @@ static int __init parse_crash_elf_headers(void)
 		rc = parse_crash_elf64_headers();
 		if (rc)
 			return rc;
-
-		/* Determine vmcore size. */
-		vmcore_size = get_vmcore_size_elf64(elfcorebuf);
 	} else if (e_ident[EI_CLASS] == ELFCLASS32) {
 		rc = parse_crash_elf32_headers();
 		if (rc)
 			return rc;
-
-		/* Determine vmcore size. */
-		vmcore_size = get_vmcore_size_elf32(elfcorebuf);
 	} else {
 		pr_warn("Warning: Core image elf header is not sane\n");
 		return -EINVAL;
 	}
+
+	/* Determine vmcore size. */
+	vmcore_size = get_vmcore_size(elfcorebuf_sz, elfnotes_sz,
+				      &vmcore_list);
+
 	return 0;
 }
 
@@ -711,7 +986,6 @@ void vmcore_cleanup(void)
 		list_del(&m->list);
 		kfree(m);
 	}
-	kfree(elfcorebuf);
-	elfcorebuf = NULL;
+	free_elfcorebuf();
 }
 EXPORT_SYMBOL_GPL(vmcore_cleanup);