Merge branch 'akpm-incoming-1'

* akpm-incoming-1: (176 commits)
  scripts/checkpatch.pl: add check for declaration of pci_device_id
  scripts/checkpatch.pl: add warnings for static char that could be static const char
  checkpatch: version 0.31
  checkpatch: statement/block context analyser should look at sanitised lines
  checkpatch: handle EXPORT_SYMBOL for DEVICE_ATTR and similar
  checkpatch: clean up structure definition macro handline
  checkpatch: update copyright dates
  checkpatch: Add additional attribute #defines
  checkpatch: check for incorrect permissions
  checkpatch: ensure kconfig help checks only apply when we are adding help
  checkpatch: simplify and consolidate "missing space after" checks
  checkpatch: add check for space after struct, union, and enum
  checkpatch: returning errno typically should be negative
  checkpatch: handle casts better fixing false categorisation of : as binary
  checkpatch: ensure we do not collapse bracketed sections into constants
  checkpatch: suggest cleanpatch and cleanfile when appropriate
  checkpatch: types may sit on a line on their own
  checkpatch: fix regressions in "fix handling of leading spaces"
  div64_u64(): improve precision on 32bit platforms
  lib/parser: cleanup match_number()
  ...

21 files changed, 125 insertions, 120 deletions

diff --git a/fs/Kconfig b/fs/Kconfig
index 65781de44fc..b5e582bd769 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -47,6 +47,9 @@ source "fs/nilfs2/Kconfig"
 
 endif # BLOCK
 
+config EXPORTFS
+	tristate
+
 config FILE_LOCKING
 	bool "Enable POSIX file locking API" if EMBEDDED
 	default y
@@ -222,9 +225,6 @@ config LOCKD_V4
 	depends on FILE_LOCKING
 	default y
 
-config EXPORTFS
-	tristate
-
 config NFS_ACL_SUPPORT
 	tristate
 	select FS_POSIX_ACL
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 722743b152d..15690bb1d3b 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -438,7 +438,6 @@ no_more:
  */
 int afs_writepage(struct page *page, struct writeback_control *wbc)
 {
-	struct backing_dev_info *bdi = page->mapping->backing_dev_info;
 	struct afs_writeback *wb;
 	int ret;
 
@@ -455,8 +454,6 @@ int afs_writepage(struct page *page, struct writeback_control *wbc)
 	}
 
 	wbc->nr_to_write -= ret;
-	if (wbc->nonblocking && bdi_write_congested(bdi))
-		wbc->encountered_congestion = 1;
 
 	_leave(" = 0");
 	return 0;
@@ -469,7 +466,6 @@ static int afs_writepages_region(struct address_space *mapping,
 				 struct writeback_control *wbc,
 				 pgoff_t index, pgoff_t end, pgoff_t *_next)
 {
-	struct backing_dev_info *bdi = mapping->backing_dev_info;
 	struct afs_writeback *wb;
 	struct page *page;
 	int ret, n;
@@ -529,11 +525,6 @@ static int afs_writepages_region(struct address_space *mapping,
 
 		wbc->nr_to_write -= ret;
 
-		if (wbc->nonblocking && bdi_write_congested(bdi)) {
-			wbc->encountered_congestion = 1;
-			break;
-		}
-
 		cond_resched();
 	} while (index < end && wbc->nr_to_write > 0);
 
@@ -548,24 +539,16 @@ static int afs_writepages_region(struct address_space *mapping,
 int afs_writepages(struct address_space *mapping,
 		   struct writeback_control *wbc)
 {
-	struct backing_dev_info *bdi = mapping->backing_dev_info;
 	pgoff_t start, end, next;
 	int ret;
 
 	_enter("");
 
-	if (wbc->nonblocking && bdi_write_congested(bdi)) {
-		wbc->encountered_congestion = 1;
-		_leave(" = 0 [congest]");
-		return 0;
-	}
-
 	if (wbc->range_cyclic) {
 		start = mapping->writeback_index;
 		end = -1;
 		ret = afs_writepages_region(mapping, wbc, start, end, &next);
-		if (start > 0 && wbc->nr_to_write > 0 && ret == 0 &&
-		    !(wbc->nonblocking && wbc->encountered_congestion))
+		if (start > 0 && wbc->nr_to_write > 0 && ret == 0)
 			ret = afs_writepages_region(mapping, wbc, 0, start,
 						    &next);
 		mapping->writeback_index = next;
diff --git a/fs/buffer.c b/fs/buffer.c
index 7f0b9b083f7..8d595ab2aed 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -905,7 +905,6 @@ try_again:
 
 		bh->b_state = 0;
 		atomic_set(&bh->b_count, 0);
-		bh->b_private = NULL;
 		bh->b_size = size;
 
 		/* Link the buffer to its page */
@@ -1706,7 +1705,7 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
 		 * and kswapd activity, but those code paths have their own
 		 * higher-level throttling.
 		 */
-		if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
+		if (wbc->sync_mode != WB_SYNC_NONE) {
 			lock_buffer(bh);
 		} else if (!trylock_buffer(bh)) {
 			redirty_page_for_writepage(wbc, page);
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 51bcc5ce323..e9c874abc9e 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -591,7 +591,6 @@ static int ceph_writepages_start(struct address_space *mapping,
 				 struct writeback_control *wbc)
 {
 	struct inode *inode = mapping->host;
-	struct backing_dev_info *bdi = mapping->backing_dev_info;
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	struct ceph_fs_client *fsc;
 	pgoff_t index, start, end;
@@ -633,13 +632,6 @@ static int ceph_writepages_start(struct address_space *mapping,
 
 	pagevec_init(&pvec, 0);
 
-	/* ?? */
-	if (wbc->nonblocking && bdi_write_congested(bdi)) {
-		dout(" writepages congested\n");
-		wbc->encountered_congestion = 1;
-		goto out_final;
-	}
-
 	/* where to start/end? */
 	if (wbc->range_cyclic) {
 		start = mapping->writeback_index; /* Start from prev offset */
@@ -885,7 +877,6 @@ out:
 		rc = 0;  /* vfs expects us to return 0 */
 	ceph_put_snap_context(snapc);
 	dout("writepages done, rc = %d\n", rc);
-out_final:
 	return rc;
 }
 
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 8c81e7b14d5..45af003865d 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1303,7 +1303,6 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
 static int cifs_writepages(struct address_space *mapping,
 			   struct writeback_control *wbc)
 {
-	struct backing_dev_info *bdi = mapping->backing_dev_info;
 	unsigned int bytes_to_write;
 	unsigned int bytes_written;
 	struct cifs_sb_info *cifs_sb;
@@ -1326,15 +1325,6 @@ static int cifs_writepages(struct address_space *mapping,
 	int scanned = 0;
 	int xid, long_op;
 
-	/*
-	 * BB: Is this meaningful for a non-block-device file system?
-	 * If it is, we should test it again after we do I/O
-	 */
-	if (wbc->nonblocking && bdi_write_congested(bdi)) {
-		wbc->encountered_congestion = 1;
-		return 0;
-	}
-
 	cifs_sb = CIFS_SB(mapping->host->i_sb);
 
 	/*
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 48d74c7391d..85882f6ba5f 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -218,7 +218,7 @@ static struct page *dio_get_page(struct dio *dio)
  * filesystems can use it to hold additional state between get_block calls and
  * dio_complete.
  */
-static int dio_complete(struct dio *dio, loff_t offset, int ret, bool is_async)
+static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is_async)
 {
 	ssize_t transferred = 0;
 
diff --git a/fs/exec.c b/fs/exec.c
index 6d2b6f93685..3aa75b8888a 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -54,6 +54,7 @@
 #include <linux/fsnotify.h>
 #include <linux/fs_struct.h>
 #include <linux/pipe_fs_i.h>
+#include <linux/oom.h>
 
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
@@ -759,6 +760,10 @@ static int exec_mmap(struct mm_struct *mm)
 	tsk->mm = mm;
 	tsk->active_mm = mm;
 	activate_mm(active_mm, mm);
+	if (old_mm && tsk->signal->oom_score_adj == OOM_SCORE_ADJ_MIN) {
+		atomic_dec(&old_mm->oom_disable_count);
+		atomic_inc(&tsk->mm->oom_disable_count);
+	}
 	task_unlock(tsk);
 	arch_pick_mmap_layout(mm);
 	if (old_mm) {
diff --git a/fs/file_table.c b/fs/file_table.c
index a04bdd81c11..c3dee381f1b 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -60,7 +60,7 @@ static inline void file_free(struct file *f)
 /*
  * Return the total number of open files in the system
  */
-static int get_nr_files(void)
+static long get_nr_files(void)
 {
 	return percpu_counter_read_positive(&nr_files);
 }
@@ -68,7 +68,7 @@ static int get_nr_files(void)
 /*
  * Return the maximum number of open files in the system
  */
-int get_max_files(void)
+unsigned long get_max_files(void)
 {
 	return files_stat.max_files;
 }
@@ -82,7 +82,7 @@ int proc_nr_files(ctl_table *table, int write,
                      void __user *buffer, size_t *lenp, loff_t *ppos)
 {
 	files_stat.nr_files = get_nr_files();
-	return proc_dointvec(table, write, buffer, lenp, ppos);
+	return proc_doulongvec_minmax(table, write, buffer, lenp, ppos);
 }
 #else
 int proc_nr_files(ctl_table *table, int write,
@@ -105,7 +105,7 @@ int proc_nr_files(ctl_table *table, int write,
 struct file *get_empty_filp(void)
 {
 	const struct cred *cred = current_cred();
-	static int old_max;
+	static long old_max;
 	struct file * f;
 
 	/*
@@ -140,8 +140,7 @@ struct file *get_empty_filp(void)
 over:
 	/* Ran out of filps - report that */
 	if (get_nr_files() > old_max) {
-		printk(KERN_INFO "VFS: file-max limit %d reached\n",
-					get_max_files());
+		pr_info("VFS: file-max limit %lu reached\n", get_max_files());
 		old_max = get_nr_files();
 	}
 	goto fail;
@@ -487,7 +486,7 @@ retry:
 
 void __init files_init(unsigned long mempages)
 { 
-	int n; 
+	unsigned long n;
 
 	filp_cachep = kmem_cache_create("filp", sizeof(struct file), 0,
 			SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL);
@@ -498,9 +497,7 @@ void __init files_init(unsigned long mempages)
 	 */ 
 
 	n = (mempages * (PAGE_SIZE / 1024)) / 10;
-	files_stat.max_files = n; 
-	if (files_stat.max_files < NR_FILE)
-		files_stat.max_files = NR_FILE;
+	files_stat.max_files = max_t(unsigned long, n, NR_FILE);
 	files_defer_init();
 	lg_lock_init(files_lglock);
 	percpu_counter_init(&nr_files, 0);
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index ab38fef1c9a..9e46aec10d1 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -582,7 +582,7 @@ static inline bool over_bground_thresh(void)
 	global_dirty_limits(&background_thresh, &dirty_thresh);
 
 	return (global_page_state(NR_FILE_DIRTY) +
-		global_page_state(NR_UNSTABLE_NFS) >= background_thresh);
+		global_page_state(NR_UNSTABLE_NFS) > background_thresh);
 }
 
 /*
@@ -721,6 +721,10 @@ static long wb_check_old_data_flush(struct bdi_writeback *wb)
 		return 0;
 
 	wb->last_old_flush = jiffies;
+	/*
+	 * Add in the number of potentially dirty inodes, because each inode
+	 * write can dirty pagecache in the underlying blockdev.
+	 */
 	nr_pages = global_page_state(NR_FILE_DIRTY) +
 			global_page_state(NR_UNSTABLE_NFS) +
 			(inodes_stat.nr_inodes - inodes_stat.nr_unused);
@@ -790,7 +794,7 @@ int bdi_writeback_thread(void *data)
 	struct backing_dev_info *bdi = wb->bdi;
 	long pages_written;
 
-	current->flags |= PF_FLUSHER | PF_SWAPWRITE;
+	current->flags |= PF_SWAPWRITE;
 	set_freezable();
 	wb->last_active = jiffies;
 
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index cde755cca56..b98664275f0 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -809,11 +809,9 @@ static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep,
 	int err;
 	struct page *page = *pagep;
 
-	if (page && zeroing && count < PAGE_SIZE) {
-		void *mapaddr = kmap_atomic(page, KM_USER1);
-		memset(mapaddr, 0, PAGE_SIZE);
-		kunmap_atomic(mapaddr, KM_USER1);
-	}
+	if (page && zeroing && count < PAGE_SIZE)
+		clear_highpage(page);
+
 	while (count) {
 		if (cs->write && cs->pipebufs && page) {
 			return fuse_ref_page(cs, page, offset, count);
@@ -830,10 +828,10 @@ static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep,
 			}
 		}
 		if (page) {
-			void *mapaddr = kmap_atomic(page, KM_USER1);
+			void *mapaddr = kmap_atomic(page, KM_USER0);
 			void *buf = mapaddr + offset;
 			offset += fuse_copy_do(cs, &buf, &count);
-			kunmap_atomic(mapaddr, KM_USER1);
+			kunmap_atomic(mapaddr, KM_USER0);
 		} else
 			offset += fuse_copy_do(cs, NULL, &count);
 	}
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index f3b071f921a..939739c7b3f 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -55,7 +55,7 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
 		 * activity, but those code paths have their own higher-level
 		 * throttling.
 		 */
-		if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
+		if (wbc->sync_mode != WB_SYNC_NONE) {
 			lock_buffer(bh);
 		} else if (!trylock_buffer(bh)) {
 			redirty_page_for_writepage(wbc, page);
diff --git a/fs/hostfs/hostfs.h b/fs/hostfs/hostfs.h
index 7c232c1487e..bf15a43016b 100644
--- a/fs/hostfs/hostfs.h
+++ b/fs/hostfs/hostfs.h
@@ -91,7 +91,6 @@ extern int rename_file(char *from, char *to);
 extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
 		     long long *bfree_out, long long *bavail_out,
 		     long long *files_out, long long *ffree_out,
-		     void *fsid_out, int fsid_size, long *namelen_out,
-		     long *spare_out);
+		     void *fsid_out, int fsid_size, long *namelen_out);
 
 #endif
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index f7dc9b5f9ef..cd7c93917cc 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -217,7 +217,7 @@ int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
 	err = do_statfs(dentry->d_sb->s_fs_info,
 			&sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files,
 			&f_ffree, &sf->f_fsid, sizeof(sf->f_fsid),
-			&sf->f_namelen, sf->f_spare);
+			&sf->f_namelen);
 	if (err)
 		return err;
 	sf->f_blocks = f_blocks;
diff --git a/fs/hostfs/hostfs_user.c b/fs/hostfs/hostfs_user.c
index 6777aa06ce2..d51a98384bc 100644
--- a/fs/hostfs/hostfs_user.c
+++ b/fs/hostfs/hostfs_user.c
@@ -94,8 +94,7 @@ void *open_dir(char *path, int *err_out)
 
 	dir = opendir(path);
 	*err_out = errno;
-	if (dir == NULL)
-		return NULL;
+
 	return dir;
 }
 
@@ -205,7 +204,7 @@ int set_attr(const char *file, struct hostfs_iattr *attrs, int fd)
 	if (attrs->ia_valid & HOSTFS_ATTR_MODE) {
 		if (fd >= 0) {
 			if (fchmod(fd, attrs->ia_mode) != 0)
-				return (-errno);
+				return -errno;
 		} else if (chmod(file, attrs->ia_mode) != 0) {
 			return -errno;
 		}
@@ -364,8 +363,7 @@ int rename_file(char *from, char *to)
 int do_statfs(char *root, long *bsize_out, long long *blocks_out,
 	      long long *bfree_out, long long *bavail_out,
 	      long long *files_out, long long *ffree_out,
-	      void *fsid_out, int fsid_size, long *namelen_out,
-	      long *spare_out)
+	      void *fsid_out, int fsid_size, long *namelen_out)
 {
 	struct statfs64 buf;
 	int err;
@@ -384,10 +382,6 @@ int do_statfs(char *root, long *bsize_out, long long *blocks_out,
 	       sizeof(buf.f_fsid) > fsid_size ? fsid_size :
 	       sizeof(buf.f_fsid));
 	*namelen_out = buf.f_namelen;
-	spare_out[0] = buf.f_spare[0];
-	spare_out[1] = buf.f_spare[1];
-	spare_out[2] = buf.f_spare[2];
-	spare_out[3] = buf.f_spare[3];
-	spare_out[4] = buf.f_spare[4];
+
 	return 0;
 }
diff --git a/fs/locks.c b/fs/locks.c
index 8b2b6ad56a0..4de3a266681 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -2109,7 +2109,7 @@ EXPORT_SYMBOL_GPL(vfs_cancel_lock);
 #include <linux/seq_file.h>
 
 static void lock_get_status(struct seq_file *f, struct file_lock *fl,
-							int id, char *pfx)
+			    loff_t id, char *pfx)
 {
 	struct inode *inode = NULL;
 	unsigned int fl_pid;
@@ -2122,7 +2122,7 @@ static void lock_get_status(struct seq_file *f, struct file_lock *fl,
 	if (fl->fl_file != NULL)
 		inode = fl->fl_file->f_path.dentry->d_inode;
 
-	seq_printf(f, "%d:%s ", id, pfx);
+	seq_printf(f, "%lld:%s ", id, pfx);
 	if (IS_POSIX(fl)) {
 		seq_printf(f, "%6s %s ",
 			     (fl->fl_flags & FL_ACCESS) ? "ACCESS" : "POSIX ",
@@ -2185,24 +2185,27 @@ static int locks_show(struct seq_file *f, void *v)
 
 	fl = list_entry(v, struct file_lock, fl_link);
 
-	lock_get_status(f, fl, (long)f->private, "");
+	lock_get_status(f, fl, *((loff_t *)f->private), "");
 
 	list_for_each_entry(bfl, &fl->fl_block, fl_block)
-		lock_get_status(f, bfl, (long)f->private, " ->");
+		lock_get_status(f, bfl, *((loff_t *)f->private), " ->");
 
-	f->private++;
 	return 0;
 }
 
 static void *locks_start(struct seq_file *f, loff_t *pos)
 {
+	loff_t *p = f->private;
+
 	lock_flocks();
-	f->private = (void *)1;
+	*p = (*pos + 1);
 	return seq_list_start(&file_lock_list, *pos);
 }
 
 static void *locks_next(struct seq_file *f, void *v, loff_t *pos)
 {
+	loff_t *p = f->private;
+	++*p;
 	return seq_list_next(v, &file_lock_list, pos);
 }
 
@@ -2220,14 +2223,14 @@ static const struct seq_operations locks_seq_operations = {
 
 static int locks_open(struct inode *inode, struct file *filp)
 {
-	return seq_open(filp, &locks_seq_operations);
+	return seq_open_private(filp, &locks_seq_operations, sizeof(loff_t));
 }
 
 static const struct file_operations proc_locks_operations = {
 	.open		= locks_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= seq_release_private,
 };
 
 static int __init proc_locks_init(void)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 605e292501f..4c14c17a527 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -290,9 +290,7 @@ static int nfs_do_writepage(struct page *page, struct writeback_control *wbc, st
 	nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1);
 
 	nfs_pageio_cond_complete(pgio, page->index);
-	ret = nfs_page_async_flush(pgio, page,
-			wbc->sync_mode == WB_SYNC_NONE ||
-			wbc->nonblocking != 0);
+	ret = nfs_page_async_flush(pgio, page, wbc->sync_mode == WB_SYNC_NONE);
 	if (ret == -EAGAIN) {
 		redirty_page_for_writepage(wbc, page);
 		ret = 0;
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index d926af62617..687d090cea3 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1609,7 +1609,7 @@ nilfs_copy_replace_page_buffers(struct page *page, struct list_head *out)
 	kunmap_atomic(kaddr, KM_USER0);
 
 	if (!TestSetPageWriteback(clone_page))
-		inc_zone_page_state(clone_page, NR_WRITEBACK);
+		account_page_writeback(clone_page);
 	unlock_page(clone_page);
 
 	return 0;
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index 50f8f0600f0..6a0068841d9 100644
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -33,8 +33,8 @@ config PROC_KCORE
 	depends on PROC_FS && MMU
 
 config PROC_VMCORE
-        bool "/proc/vmcore support (EXPERIMENTAL)"
-        depends on PROC_FS && CRASH_DUMP
+	bool "/proc/vmcore support"
+	depends on PROC_FS && CRASH_DUMP
 	default y
         help
         Exports the dump image of crashed kernel in ELF format.
diff --git a/fs/proc/base.c b/fs/proc/base.c
index dc5d5f51f3f..53dc8ad40ae 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1023,28 +1023,47 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
 	memset(buffer, 0, sizeof(buffer));
 	if (count > sizeof(buffer) - 1)
 		count = sizeof(buffer) - 1;
-	if (copy_from_user(buffer, buf, count))
-		return -EFAULT;
+	if (copy_from_user(buffer, buf, count)) {
+		err = -EFAULT;
+		goto out;
+	}
 
 	err = strict_strtol(strstrip(buffer), 0, &oom_adjust);
 	if (err)
-		return -EINVAL;
+		goto out;
 	if ((oom_adjust < OOM_ADJUST_MIN || oom_adjust > OOM_ADJUST_MAX) &&
-	     oom_adjust != OOM_DISABLE)
-		return -EINVAL;
+	     oom_adjust != OOM_DISABLE) {
+		err = -EINVAL;
+		goto out;
+	}
 
 	task = get_proc_task(file->f_path.dentry->d_inode);
-	if (!task)
-		return -ESRCH;
+	if (!task) {
+		err = -ESRCH;
+		goto out;
+	}
+
+	task_lock(task);
+	if (!task->mm) {
+		err = -EINVAL;
+		goto err_task_lock;
+	}
+
 	if (!lock_task_sighand(task, &flags)) {
-		put_task_struct(task);
-		return -ESRCH;
+		err = -ESRCH;
+		goto err_task_lock;
 	}
 
 	if (oom_adjust < task->signal->oom_adj && !capable(CAP_SYS_RESOURCE)) {
-		unlock_task_sighand(task, &flags);
-		put_task_struct(task);
-		return -EACCES;
+		err = -EACCES;
+		goto err_sighand;
+	}
+
+	if (oom_adjust != task->signal->oom_adj) {
+		if (oom_adjust == OOM_DISABLE)
+			atomic_inc(&task->mm->oom_disable_count);
+		if (task->signal->oom_adj == OOM_DISABLE)
+			atomic_dec(&task->mm->oom_disable_count);
 	}
 
 	/*
@@ -1065,10 +1084,13 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
 	else
 		task->signal->oom_score_adj = (oom_adjust * OOM_SCORE_ADJ_MAX) /
 								-OOM_DISABLE;
+err_sighand:
 	unlock_task_sighand(task, &flags);
+err_task_lock:
+	task_unlock(task);
 	put_task_struct(task);
-
-	return count;
+out:
+	return err < 0 ? err : count;
 }
 
 static const struct file_operations proc_oom_adjust_operations = {
@@ -1109,30 +1131,49 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
 	memset(buffer, 0, sizeof(buffer));
 	if (count > sizeof(buffer) - 1)
 		count = sizeof(buffer) - 1;
-	if (copy_from_user(buffer, buf, count))
-		return -EFAULT;
+	if (copy_from_user(buffer, buf, count)) {
+		err = -EFAULT;
+		goto out;
+	}
 
 	err = strict_strtol(strstrip(buffer), 0, &oom_score_adj);
 	if (err)
-		return -EINVAL;
+		goto out;
 	if (oom_score_adj < OOM_SCORE_ADJ_MIN ||
-			oom_score_adj > OOM_SCORE_ADJ_MAX)
-		return -EINVAL;
+			oom_score_adj > OOM_SCORE_ADJ_MAX) {
+		err = -EINVAL;
+		goto out;
+	}
 
 	task = get_proc_task(file->f_path.dentry->d_inode);
-	if (!task)
-		return -ESRCH;
+	if (!task) {
+		err = -ESRCH;
+		goto out;
+	}
+
+	task_lock(task);
+	if (!task->mm) {
+		err = -EINVAL;
+		goto err_task_lock;
+	}
+
 	if (!lock_task_sighand(task, &flags)) {
-		put_task_struct(task);
-		return -ESRCH;
+		err = -ESRCH;
+		goto err_task_lock;
 	}
+
 	if (oom_score_adj < task->signal->oom_score_adj &&
 			!capable(CAP_SYS_RESOURCE)) {
-		unlock_task_sighand(task, &flags);
-		put_task_struct(task);
-		return -EACCES;
+		err = -EACCES;
+		goto err_sighand;
 	}
 
+	if (oom_score_adj != task->signal->oom_score_adj) {
+		if (oom_score_adj == OOM_SCORE_ADJ_MIN)
+			atomic_inc(&task->mm->oom_disable_count);
+		if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
+			atomic_dec(&task->mm->oom_disable_count);
+	}
 	task->signal->oom_score_adj = oom_score_adj;
 	/*
 	 * Scale /proc/pid/oom_adj appropriately ensuring that OOM_DISABLE is
@@ -1143,9 +1184,13 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
 	else
 		task->signal->oom_adj = (oom_score_adj * OOM_ADJUST_MAX) /
 							OOM_SCORE_ADJ_MAX;
+err_sighand:
 	unlock_task_sighand(task, &flags);
+err_task_lock:
+	task_unlock(task);
 	put_task_struct(task);
-	return count;
+out:
+	return err < 0 ? err : count;
 }
 
 static const struct file_operations proc_oom_score_adj_operations = {
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index caa758377d6..c1f93896cb5 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2438,7 +2438,7 @@ static int reiserfs_write_full_page(struct page *page,
 		/* from this point on, we know the buffer is mapped to a
 		 * real block and not a direct item
 		 */
-		if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
+		if (wbc->sync_mode != WB_SYNC_NONE) {
 			lock_buffer(bh);
 		} else {
 			if (!trylock_buffer(bh)) {
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index b552f816de1..c9af48fffcd 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1139,8 +1139,7 @@ xfs_vm_writepage(
 				type = IO_DELAY;
 				flags = BMAPI_ALLOCATE;
 
-				if (wbc->sync_mode == WB_SYNC_NONE &&
-				    wbc->nonblocking)
+				if (wbc->sync_mode == WB_SYNC_NONE)
 					flags |= BMAPI_TRYLOCK;
 			}