Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6

227 files changed, 5959 insertions, 3508 deletions

diff --git a/fs/Kconfig b/fs/Kconfig
index 37db79a2ff95..d3873583360b 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -902,65 +902,7 @@ endif # BLOCK
 
 menu "Pseudo filesystems"
 
-config PROC_FS
-	bool "/proc file system support" if EMBEDDED
-	default y
-	help
-	  This is a virtual file system providing information about the status
-	  of the system. "Virtual" means that it doesn't take up any space on
-	  your hard disk: the files are created on the fly by the kernel when
-	  you try to access them. Also, you cannot read the files with older
-	  version of the program less: you need to use more or cat.
-
-	  It's totally cool; for example, "cat /proc/interrupts" gives
-	  information about what the different IRQs are used for at the moment
-	  (there is a small number of Interrupt ReQuest lines in your computer
-	  that are used by the attached devices to gain the CPU's attention --
-	  often a source of trouble if two devices are mistakenly configured
-	  to use the same IRQ). The program procinfo to display some
-	  information about your system gathered from the /proc file system.
-
-	  Before you can use the /proc file system, it has to be mounted,
-	  meaning it has to be given a location in the directory hierarchy.
-	  That location should be /proc. A command such as "mount -t proc proc
-	  /proc" or the equivalent line in /etc/fstab does the job.
-
-	  The /proc file system is explained in the file
-	  <file:Documentation/filesystems/proc.txt> and on the proc(5) manpage
-	  ("man 5 proc").
-
-	  This option will enlarge your kernel by about 67 KB. Several
-	  programs depend on this, so everyone should say Y here.
-
-config PROC_KCORE
-	bool "/proc/kcore support" if !ARM
-	depends on PROC_FS && MMU
-
-config PROC_VMCORE
-        bool "/proc/vmcore support (EXPERIMENTAL)"
-        depends on PROC_FS && CRASH_DUMP
-	default y
-        help
-        Exports the dump image of crashed kernel in ELF format.
-
-config PROC_SYSCTL
-	bool "Sysctl support (/proc/sys)" if EMBEDDED
-	depends on PROC_FS
-	select SYSCTL
-	default y
-	---help---
-	  The sysctl interface provides a means of dynamically changing
-	  certain kernel parameters and variables on the fly without requiring
-	  a recompile of the kernel or reboot of the system.  The primary
-	  interface is through /proc/sys.  If you say Y here a tree of
-	  modifiable sysctl entries will be generated beneath the
-          /proc/sys directory. They are explained in the files
-	  in <file:Documentation/sysctl/>.  Note that enabling this
-	  option will enlarge the kernel by at least 8 KB.
-
-	  As it is generally a good thing, you should say Y here unless
-	  building a kernel for install/rescue disks or your system is very
-	  limited in memory.
+source "fs/proc/Kconfig"
 
 config SYSFS
 	bool "sysfs file system support" if EMBEDDED
@@ -1441,6 +1383,19 @@ config MINIX_FS
 	  partition (the one containing the directory /) cannot be compiled as
 	  a module.
 
+config OMFS_FS
+	tristate "SonicBlue Optimized MPEG File System support"
+	depends on BLOCK
+	select CRC_ITU_T
+	help
+	  This is the proprietary file system used by the Rio Karma music
+	  player and ReplayTV DVR.  Despite the name, this filesystem is not
+	  more efficient than a standard FS for MPEG files, in fact likely
+	  the opposite is true.  Say Y if you have either of these devices
+	  and wish to mount its disk.
+
+	  To compile this file system support as a module, choose M here: the
+	  module will be called omfs.  If unsure, say N.
 
 config HPFS_FS
 	tristate "OS/2 HPFS file system support"
@@ -2093,20 +2048,6 @@ config CODA_FS
 	  To compile the coda client support as a module, choose M here: the
 	  module will be called coda.
 
-config CODA_FS_OLD_API
-	bool "Use 96-bit Coda file identifiers"
-	depends on CODA_FS
-	help
-	  A new kernel-userspace API had to be introduced for Coda v6.0
-	  to support larger 128-bit file identifiers as needed by the
-	  new realms implementation.
-
-	  However this new API is not backward compatible with older
-	  clients. If you really need to run the old Coda userspace
-	  cache manager then say Y.
-
-	  For most cases you probably want to say N.
-
 config AFS_FS
 	tristate "Andrew File System support (AFS) (EXPERIMENTAL)"
 	depends on INET && EXPERIMENTAL
diff --git a/fs/Makefile b/fs/Makefile
index 3b2178b4bb66..a1482a5eff15 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -111,6 +111,7 @@ obj-$(CONFIG_ADFS_FS)		+= adfs/
 obj-$(CONFIG_FUSE_FS)		+= fuse/
 obj-$(CONFIG_UDF_FS)		+= udf/
 obj-$(CONFIG_SUN_OPENPROMFS)	+= openpromfs/
+obj-$(CONFIG_OMFS_FS)		+= omfs/
 obj-$(CONFIG_JFS_FS)		+= jfs/
 obj-$(CONFIG_XFS_FS)		+= xfs/
 obj-$(CONFIG_9P_FS)		+= 9p/
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 9e421eeb672b..26f3b43726bb 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -249,7 +249,7 @@ static void adfs_destroy_inode(struct inode *inode)
 	kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct adfs_inode_info *ei = (struct adfs_inode_info *) foo;
 
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 223b1917093e..e9ec915f7553 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -2,6 +2,7 @@
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
 #include <linux/amigaffs.h>
+#include <linux/mutex.h>
 
 /* AmigaOS allows file names with up to 30 characters length.
  * Names longer than that will be silently truncated. If you
@@ -98,7 +99,7 @@ struct affs_sb_info {
 	gid_t s_gid;			/* gid to override */
 	umode_t s_mode;			/* mode to override */
 	struct buffer_head *s_root_bh;	/* Cached root block. */
-	struct semaphore s_bmlock;	/* Protects bitmap access. */
+	struct mutex s_bmlock;		/* Protects bitmap access. */
 	struct affs_bm_info *s_bitmap;	/* Bitmap infos. */
 	u32 s_bmap_count;		/* # of bitmap blocks. */
 	u32 s_bmap_bits;		/* # of bits in one bitmap blocks */
diff --git a/fs/affs/bitmap.c b/fs/affs/bitmap.c
index c4a5ad09ddf2..dc5ef14bdc1c 100644
--- a/fs/affs/bitmap.c
+++ b/fs/affs/bitmap.c
@@ -45,14 +45,14 @@ affs_count_free_blocks(struct super_block *sb)
 	if (sb->s_flags & MS_RDONLY)
 		return 0;
 
-	down(&AFFS_SB(sb)->s_bmlock);
+	mutex_lock(&AFFS_SB(sb)->s_bmlock);
 
 	bm = AFFS_SB(sb)->s_bitmap;
 	free = 0;
 	for (i = AFFS_SB(sb)->s_bmap_count; i > 0; bm++, i--)
 		free += bm->bm_free;
 
-	up(&AFFS_SB(sb)->s_bmlock);
+	mutex_unlock(&AFFS_SB(sb)->s_bmlock);
 
 	return free;
 }
@@ -76,7 +76,7 @@ affs_free_block(struct super_block *sb, u32 block)
 	bit     = blk % sbi->s_bmap_bits;
 	bm      = &sbi->s_bitmap[bmap];
 
-	down(&sbi->s_bmlock);
+	mutex_lock(&sbi->s_bmlock);
 
 	bh = sbi->s_bmap_bh;
 	if (sbi->s_last_bmap != bmap) {
@@ -105,19 +105,19 @@ affs_free_block(struct super_block *sb, u32 block)
 	sb->s_dirt = 1;
 	bm->bm_free++;
 
-	up(&sbi->s_bmlock);
+	mutex_unlock(&sbi->s_bmlock);
 	return;
 
 err_free:
 	affs_warning(sb,"affs_free_block","Trying to free block %u which is already free", block);
-	up(&sbi->s_bmlock);
+	mutex_unlock(&sbi->s_bmlock);
 	return;
 
 err_bh_read:
 	affs_error(sb,"affs_free_block","Cannot read bitmap block %u", bm->bm_key);
 	sbi->s_bmap_bh = NULL;
 	sbi->s_last_bmap = ~0;
-	up(&sbi->s_bmlock);
+	mutex_unlock(&sbi->s_bmlock);
 	return;
 
 err_range:
@@ -168,7 +168,7 @@ affs_alloc_block(struct inode *inode, u32 goal)
 	bmap = blk / sbi->s_bmap_bits;
 	bm = &sbi->s_bitmap[bmap];
 
-	down(&sbi->s_bmlock);
+	mutex_lock(&sbi->s_bmlock);
 
 	if (bm->bm_free)
 		goto find_bmap_bit;
@@ -249,7 +249,7 @@ find_bit:
 	mark_buffer_dirty(bh);
 	sb->s_dirt = 1;
 
-	up(&sbi->s_bmlock);
+	mutex_unlock(&sbi->s_bmlock);
 
 	pr_debug("%d\n", blk);
 	return blk;
@@ -259,7 +259,7 @@ err_bh_read:
 	sbi->s_bmap_bh = NULL;
 	sbi->s_last_bmap = ~0;
 err_full:
-	up(&sbi->s_bmlock);
+	mutex_unlock(&sbi->s_bmlock);
 	pr_debug("failed\n");
 	return 0;
 }
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 6eac7bdeec94..1377b1240b6e 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -46,8 +46,6 @@ const struct inode_operations affs_file_inode_operations = {
 static int
 affs_file_open(struct inode *inode, struct file *filp)
 {
-	if (atomic_read(&filp->f_count) != 1)
-		return 0;
 	pr_debug("AFFS: open(%lu,%d)\n",
 		 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
 	atomic_inc(&AFFS_I(inode)->i_opencnt);
@@ -57,8 +55,6 @@ affs_file_open(struct inode *inode, struct file *filp)
 static int
 affs_file_release(struct inode *inode, struct file *filp)
 {
-	if (atomic_read(&filp->f_count) != 0)
-		return 0;
 	pr_debug("AFFS: release(%lu, %d)\n",
 		 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt));
 
diff --git a/fs/affs/super.c b/fs/affs/super.c
index d214837d5e42..3a89094f93d0 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -90,7 +90,7 @@ static void affs_destroy_inode(struct inode *inode)
 	kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct affs_inode_info *ei = (struct affs_inode_info *) foo;
 
@@ -290,7 +290,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 	if (!sbi)
 		return -ENOMEM;
 	sb->s_fs_info = sbi;
-	init_MUTEX(&sbi->s_bmlock);
+	mutex_init(&sbi->s_bmlock);
 
 	if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
 				&blocksize,&sbi->s_prefix,
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 7102824ba847..3cb6920ff30b 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -469,8 +469,6 @@ extern bool afs_cm_incoming_call(struct afs_call *);
 extern const struct inode_operations afs_dir_inode_operations;
 extern const struct file_operations afs_dir_file_operations;
 
-extern int afs_permission(struct inode *, int, struct nameidata *);
-
 /*
  * file.c
  */
@@ -605,7 +603,7 @@ extern void afs_clear_permits(struct afs_vnode *);
 extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
 extern void afs_zap_permits(struct rcu_head *);
 extern struct key *afs_request_key(struct afs_cell *);
-extern int afs_permission(struct inode *, int, struct nameidata *);
+extern int afs_permission(struct inode *, int);
 
 /*
  * server.c
diff --git a/fs/afs/security.c b/fs/afs/security.c
index 3bcbeceba1bb..3ef504370034 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -284,7 +284,7 @@ static int afs_check_permit(struct afs_vnode *vnode, struct key *key,
  * - AFS ACLs are attached to directories only, and a file is controlled by its
  *   parent directory's ACL
  */
-int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int afs_permission(struct inode *inode, int mask)
 {
 	struct afs_vnode *vnode = AFS_FS_I(inode);
 	afs_access_t uninitialized_var(access);
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 7e3faeef6818..250d8c4d66e4 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -27,7 +27,7 @@
 
 #define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */
 
-static void afs_i_init_once(struct kmem_cache *cachep, void *foo);
+static void afs_i_init_once(void *foo);
 static int afs_get_sb(struct file_system_type *fs_type,
 		      int flags, const char *dev_name,
 		      void *data, struct vfsmount *mnt);
@@ -449,7 +449,7 @@ static void afs_put_super(struct super_block *sb)
 /*
  * initialise an inode cache slab element prior to any use
  */
-static void afs_i_init_once(struct kmem_cache *cachep, void *_vnode)
+static void afs_i_init_once(void *_vnode)
 {
 	struct afs_vnode *vnode = _vnode;
 
diff --git a/fs/aio.c b/fs/aio.c
index 0fb3117ddd93..f658441d5666 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -512,8 +512,8 @@ static void aio_fput_routine(struct work_struct *data)
  */
 static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
 {
-	dprintk(KERN_DEBUG "aio_put(%p): f_count=%d\n",
-		req, atomic_read(&req->ki_filp->f_count));
+	dprintk(KERN_DEBUG "aio_put(%p): f_count=%ld\n",
+		req, atomic_long_read(&req->ki_filp->f_count));
 
 	assert_spin_locked(&ctx->ctx_lock);
 
@@ -528,7 +528,7 @@ static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
 	/* Must be done under the lock to serialise against cancellation.
 	 * Call this aio_fput as it duplicates fput via the fput_work.
 	 */
-	if (unlikely(atomic_dec_and_test(&req->ki_filp->f_count))) {
+	if (unlikely(atomic_long_dec_and_test(&req->ki_filp->f_count))) {
 		get_ioctx(ctx);
 		spin_lock(&fput_lock);
 		list_add(&req->ki_list, &fput_head);
@@ -586,7 +586,6 @@ static void use_mm(struct mm_struct *mm)
 	struct task_struct *tsk = current;
 
 	task_lock(tsk);
-	tsk->flags |= PF_BORROWED_MM;
 	active_mm = tsk->active_mm;
 	atomic_inc(&mm->mm_count);
 	tsk->mm = mm;
@@ -610,7 +609,6 @@ static void unuse_mm(struct mm_struct *mm)
 	struct task_struct *tsk = current;
 
 	task_lock(tsk);
-	tsk->flags &= ~PF_BORROWED_MM;
 	tsk->mm = NULL;
 	/* active_mm is still 'mm' */
 	enter_lazy_tlb(mm, tsk);
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 977ef208c051..3662dd44896b 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -58,8 +58,9 @@ static struct dentry_operations anon_inodefs_dentry_operations = {
  *                    of the file
  *
  * @name:    [in]    name of the "class" of the new file
- * @fops     [in]    file operations for the new file
- * @priv     [in]    private data for the new file (will be file's private_data)
+ * @fops:    [in]    file operations for the new file
+ * @priv:    [in]    private data for the new file (will be file's private_data)
+ * @flags:   [in]    flags
  *
  * Creates a new file by hooking it on a single inode. This is useful for files
  * that do not need to have a full-fledged inode in order to operate correctly.
@@ -68,7 +69,7 @@ static struct dentry_operations anon_inodefs_dentry_operations = {
  * setup.  Returns new descriptor or -error.
  */
 int anon_inode_getfd(const char *name, const struct file_operations *fops,
-		     void *priv)
+		     void *priv, int flags)
 {
 	struct qstr this;
 	struct dentry *dentry;
@@ -78,7 +79,7 @@ int anon_inode_getfd(const char *name, const struct file_operations *fops,
 	if (IS_ERR(anon_inode_inode))
 		return -ENODEV;
 
-	error = get_unused_fd();
+	error = get_unused_fd_flags(flags);
 	if (error < 0)
 		return error;
 	fd = error;
@@ -115,7 +116,7 @@ int anon_inode_getfd(const char *name, const struct file_operations *fops,
 	file->f_mapping = anon_inode_inode->i_mapping;
 
 	file->f_pos = 0;
-	file->f_flags = O_RDWR;
+	file->f_flags = O_RDWR | (flags & O_NONBLOCK);
 	file->f_version = 0;
 	file->private_data = priv;
 
diff --git a/fs/attr.c b/fs/attr.c
index 966b73e25f82..26c71ba1eed4 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -51,7 +51,7 @@ int inode_change_ok(struct inode *inode, struct iattr *attr)
 	}
 
 	/* Check for setting the inode time. */
-	if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
+	if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)) {
 		if (!is_owner_or_cap(inode))
 			goto error;
 	}
@@ -108,6 +108,11 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
 	struct timespec now;
 	unsigned int ia_valid = attr->ia_valid;
 
+	if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) {
+		if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+			return -EPERM;
+	}
+
 	now = current_fs_time(inode->i_sb);
 
 	attr->ia_ctime = now;
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index c3d352d7fa93..69a2f5c92319 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -52,7 +52,10 @@ struct autofs_info {
 
 	int		flags;
 
-	struct list_head rehash;
+	struct completion expire_complete;
+
+	struct list_head active;
+	struct list_head expiring;
 
 	struct autofs_sb_info *sbi;
 	unsigned long last_used;
@@ -68,15 +71,14 @@ struct autofs_info {
 };
 
 #define AUTOFS_INF_EXPIRING	(1<<0) /* dentry is in the process of expiring */
+#define AUTOFS_INF_MOUNTPOINT	(1<<1) /* mountpoint status for direct expire */
 
 struct autofs_wait_queue {
 	wait_queue_head_t queue;
 	struct autofs_wait_queue *next;
 	autofs_wqt_t wait_queue_token;
 	/* We use the following to see what we are waiting for */
-	unsigned int hash;
-	unsigned int len;
-	char *name;
+	struct qstr name;
 	u32 dev;
 	u64 ino;
 	uid_t uid;
@@ -85,7 +87,7 @@ struct autofs_wait_queue {
 	pid_t tgid;
 	/* This is for status reporting upon return */
 	int status;
-	atomic_t wait_ctr;
+	unsigned int wait_ctr;
 };
 
 #define AUTOFS_SBI_MAGIC 0x6d4a556d
@@ -112,8 +114,9 @@ struct autofs_sb_info {
 	struct mutex wq_mutex;
 	spinlock_t fs_lock;
 	struct autofs_wait_queue *queues; /* Wait queue pointer */
-	spinlock_t rehash_lock;
-	struct list_head rehash_list;
+	spinlock_t lookup_lock;
+	struct list_head active_list;
+	struct list_head expiring_list;
 };
 
 static inline struct autofs_sb_info *autofs4_sbi(struct super_block *sb)
@@ -138,18 +141,14 @@ static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) {
 static inline int autofs4_ispending(struct dentry *dentry)
 {
 	struct autofs_info *inf = autofs4_dentry_ino(dentry);
-	int pending = 0;
 
 	if (dentry->d_flags & DCACHE_AUTOFS_PENDING)
 		return 1;
 
-	if (inf) {
-		spin_lock(&inf->sbi->fs_lock);
-		pending = inf->flags & AUTOFS_INF_EXPIRING;
-		spin_unlock(&inf->sbi->fs_lock);
-	}
+	if (inf->flags & AUTOFS_INF_EXPIRING)
+		return 1;
 
-	return pending;
+	return 0;
 }
 
 static inline void autofs4_copy_atime(struct file *src, struct file *dst)
@@ -164,6 +163,7 @@ void autofs4_free_ino(struct autofs_info *);
 
 /* Expiration */
 int is_autofs4_dentry(struct dentry *);
+int autofs4_expire_wait(struct dentry *dentry);
 int autofs4_expire_run(struct super_block *, struct vfsmount *,
 			struct autofs_sb_info *,
 			struct autofs_packet_expire __user *);
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 894fee54d4d8..cdabb796ff01 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -259,13 +259,15 @@ static struct dentry *autofs4_expire_direct(struct super_block *sb,
 	now = jiffies;
 	timeout = sbi->exp_timeout;
 
-	/* Lock the tree as we must expire as a whole */
 	spin_lock(&sbi->fs_lock);
 	if (!autofs4_direct_busy(mnt, root, timeout, do_now)) {
 		struct autofs_info *ino = autofs4_dentry_ino(root);
-
-		/* Set this flag early to catch sys_chdir and the like */
+		if (d_mountpoint(root)) {
+			ino->flags |= AUTOFS_INF_MOUNTPOINT;
+			root->d_mounted--;
+		}
 		ino->flags |= AUTOFS_INF_EXPIRING;
+		init_completion(&ino->expire_complete);
 		spin_unlock(&sbi->fs_lock);
 		return root;
 	}
@@ -292,6 +294,8 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
 	struct list_head *next;
 	int do_now = how & AUTOFS_EXP_IMMEDIATE;
 	int exp_leaves = how & AUTOFS_EXP_LEAVES;
+	struct autofs_info *ino;
+	unsigned int ino_count;
 
 	if (!root)
 		return NULL;
@@ -316,6 +320,9 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
 		dentry = dget(dentry);
 		spin_unlock(&dcache_lock);
 
+		spin_lock(&sbi->fs_lock);
+		ino = autofs4_dentry_ino(dentry);
+
 		/*
 		 * Case 1: (i) indirect mount or top level pseudo direct mount
 		 *	   (autofs-4.1).
@@ -326,6 +333,11 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
 			DPRINTK("checking mountpoint %p %.*s",
 				dentry, (int)dentry->d_name.len, dentry->d_name.name);
 
+			/* Path walk currently on this dentry? */
+			ino_count = atomic_read(&ino->count) + 2;
+			if (atomic_read(&dentry->d_count) > ino_count)
+				goto next;
+
 			/* Can we umount this guy */
 			if (autofs4_mount_busy(mnt, dentry))
 				goto next;
@@ -343,23 +355,25 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
 
 		/* Case 2: tree mount, expire iff entire tree is not busy */
 		if (!exp_leaves) {
-			/* Lock the tree as we must expire as a whole */
-			spin_lock(&sbi->fs_lock);
-			if (!autofs4_tree_busy(mnt, dentry, timeout, do_now)) {
-				struct autofs_info *inf = autofs4_dentry_ino(dentry);
+			/* Path walk currently on this dentry? */
+			ino_count = atomic_read(&ino->count) + 1;
+			if (atomic_read(&dentry->d_count) > ino_count)
+				goto next;
 
-				/* Set this flag early to catch sys_chdir and the like */
-				inf->flags |= AUTOFS_INF_EXPIRING;
-				spin_unlock(&sbi->fs_lock);
+			if (!autofs4_tree_busy(mnt, dentry, timeout, do_now)) {
 				expired = dentry;
 				goto found;
 			}
-			spin_unlock(&sbi->fs_lock);
 		/*
 		 * Case 3: pseudo direct mount, expire individual leaves
 		 *	   (autofs-4.1).
 		 */
 		} else {
+			/* Path walk currently on this dentry? */
+			ino_count = atomic_read(&ino->count) + 1;
+			if (atomic_read(&dentry->d_count) > ino_count)
+				goto next;
+
 			expired = autofs4_check_leaves(mnt, dentry, timeout, do_now);
 			if (expired) {
 				dput(dentry);
@@ -367,6 +381,7 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
 			}
 		}
 next:
+		spin_unlock(&sbi->fs_lock);
 		dput(dentry);
 		spin_lock(&dcache_lock);
 		next = next->next;
@@ -377,12 +392,45 @@ next:
 found:
 	DPRINTK("returning %p %.*s",
 		expired, (int)expired->d_name.len, expired->d_name.name);
+	ino = autofs4_dentry_ino(expired);
+	ino->flags |= AUTOFS_INF_EXPIRING;
+	init_completion(&ino->expire_complete);
+	spin_unlock(&sbi->fs_lock);
 	spin_lock(&dcache_lock);
 	list_move(&expired->d_parent->d_subdirs, &expired->d_u.d_child);
 	spin_unlock(&dcache_lock);
 	return expired;
 }
 
+int autofs4_expire_wait(struct dentry *dentry)
+{
+	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
+	struct autofs_info *ino = autofs4_dentry_ino(dentry);
+	int status;
+
+	/* Block on any pending expire */
+	spin_lock(&sbi->fs_lock);
+	if (ino->flags & AUTOFS_INF_EXPIRING) {
+		spin_unlock(&sbi->fs_lock);
+
+		DPRINTK("waiting for expire %p name=%.*s",
+			 dentry, dentry->d_name.len, dentry->d_name.name);
+
+		status = autofs4_wait(sbi, dentry, NFY_NONE);
+		wait_for_completion(&ino->expire_complete);
+
+		DPRINTK("expire done status=%d", status);
+
+		if (d_unhashed(dentry))
+			return -EAGAIN;
+
+		return status;
+	}
+	spin_unlock(&sbi->fs_lock);
+
+	return 0;
+}
+
 /* Perform an expiry operation */
 int autofs4_expire_run(struct super_block *sb,
 		      struct vfsmount *mnt,
@@ -390,7 +438,9 @@ int autofs4_expire_run(struct super_block *sb,
 		      struct autofs_packet_expire __user *pkt_p)
 {
 	struct autofs_packet_expire pkt;
+	struct autofs_info *ino;
 	struct dentry *dentry;
+	int ret = 0;
 
 	memset(&pkt,0,sizeof pkt);
 
@@ -406,9 +456,15 @@ int autofs4_expire_run(struct super_block *sb,
 	dput(dentry);
 
 	if ( copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire)) )
-		return -EFAULT;
+		ret = -EFAULT;
 
-	return 0;
+	spin_lock(&sbi->fs_lock);
+	ino = autofs4_dentry_ino(dentry);
+	ino->flags &= ~AUTOFS_INF_EXPIRING;
+	complete_all(&ino->expire_complete);
+	spin_unlock(&sbi->fs_lock);
+
+	return ret;
 }
 
 /* Call repeatedly until it returns -EAGAIN, meaning there's nothing
@@ -433,9 +489,16 @@ int autofs4_expire_multi(struct super_block *sb, struct vfsmount *mnt,
 
 		/* This is synchronous because it makes the daemon a
                    little easier */
-		ino->flags |= AUTOFS_INF_EXPIRING;
 		ret = autofs4_wait(sbi, dentry, NFY_EXPIRE);
+
+		spin_lock(&sbi->fs_lock);
+		if (ino->flags & AUTOFS_INF_MOUNTPOINT) {
+			sb->s_root->d_mounted++;
+			ino->flags &= ~AUTOFS_INF_MOUNTPOINT;
+		}
 		ino->flags &= ~AUTOFS_INF_EXPIRING;
+		complete_all(&ino->expire_complete);
+		spin_unlock(&sbi->fs_lock);
 		dput(dentry);
 	}
 
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 2fdcf5e1d236..7bb3e5ba0537 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -24,8 +24,10 @@
 
 static void ino_lnkfree(struct autofs_info *ino)
 {
-	kfree(ino->u.symlink);
-	ino->u.symlink = NULL;
+	if (ino->u.symlink) {
+		kfree(ino->u.symlink);
+		ino->u.symlink = NULL;
+	}
 }
 
 struct autofs_info *autofs4_init_ino(struct autofs_info *ino,
@@ -41,16 +43,18 @@ struct autofs_info *autofs4_init_ino(struct autofs_info *ino,
 	if (ino == NULL)
 		return NULL;
 
-	ino->flags = 0;
-	ino->mode = mode;
-	ino->inode = NULL;
-	ino->dentry = NULL;
-	ino->size = 0;
-
-	INIT_LIST_HEAD(&ino->rehash);
+	if (!reinit) {
+		ino->flags = 0;
+		ino->inode = NULL;
+		ino->dentry = NULL;
+		ino->size = 0;
+		INIT_LIST_HEAD(&ino->active);
+		INIT_LIST_HEAD(&ino->expiring);
+		atomic_set(&ino->count, 0);
+	}
 
+	ino->mode = mode;
 	ino->last_used = jiffies;
-	atomic_set(&ino->count, 0);
 
 	ino->sbi = sbi;
 
@@ -159,8 +163,8 @@ void autofs4_kill_sb(struct super_block *sb)
 	if (!sbi)
 		goto out_kill_sb;
 
-	if (!sbi->catatonic)
-		autofs4_catatonic_mode(sbi); /* Free wait queues, close pipe */
+	/* Free wait queues, close pipe */
+	autofs4_catatonic_mode(sbi);
 
 	/* Clean up and release dangling references */
 	autofs4_force_release(sbi);
@@ -338,8 +342,9 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
 	mutex_init(&sbi->wq_mutex);
 	spin_lock_init(&sbi->fs_lock);
 	sbi->queues = NULL;
-	spin_lock_init(&sbi->rehash_lock);
-	INIT_LIST_HEAD(&sbi->rehash_list);
+	spin_lock_init(&sbi->lookup_lock);
+	INIT_LIST_HEAD(&sbi->active_list);
+	INIT_LIST_HEAD(&sbi->expiring_list);
 	s->s_blocksize = 1024;
 	s->s_blocksize_bits = 10;
 	s->s_magic = AUTOFS_SUPER_MAGIC;
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index edf5b6bddb52..bcfb2dc0a61b 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -25,25 +25,25 @@ static int autofs4_dir_rmdir(struct inode *,struct dentry *);
 static int autofs4_dir_mkdir(struct inode *,struct dentry *,int);
 static int autofs4_root_ioctl(struct inode *, struct file *,unsigned int,unsigned long);
 static int autofs4_dir_open(struct inode *inode, struct file *file);
-static int autofs4_dir_close(struct inode *inode, struct file *file);
-static int autofs4_dir_readdir(struct file * filp, void * dirent, filldir_t filldir);
-static int autofs4_root_readdir(struct file * filp, void * dirent, filldir_t filldir);
 static struct dentry *autofs4_lookup(struct inode *,struct dentry *, struct nameidata *);
 static void *autofs4_follow_link(struct dentry *, struct nameidata *);
 
+#define TRIGGER_FLAGS   (LOOKUP_CONTINUE | LOOKUP_DIRECTORY)
+#define TRIGGER_INTENTS (LOOKUP_OPEN | LOOKUP_CREATE)
+
 const struct file_operations autofs4_root_operations = {
 	.open		= dcache_dir_open,
 	.release	= dcache_dir_close,
 	.read		= generic_read_dir,
-	.readdir	= autofs4_root_readdir,
+	.readdir	= dcache_readdir,
 	.ioctl		= autofs4_root_ioctl,
 };
 
 const struct file_operations autofs4_dir_operations = {
 	.open		= autofs4_dir_open,
-	.release	= autofs4_dir_close,
+	.release	= dcache_dir_close,
 	.read		= generic_read_dir,
-	.readdir	= autofs4_dir_readdir,
+	.readdir	= dcache_readdir,
 };
 
 const struct inode_operations autofs4_indirect_root_inode_operations = {
@@ -70,42 +70,10 @@ const struct inode_operations autofs4_dir_inode_operations = {
 	.rmdir		= autofs4_dir_rmdir,
 };
 
-static int autofs4_root_readdir(struct file *file, void *dirent,
-				filldir_t filldir)
-{
-	struct autofs_sb_info *sbi = autofs4_sbi(file->f_path.dentry->d_sb);
-	int oz_mode = autofs4_oz_mode(sbi);
-
-	DPRINTK("called, filp->f_pos = %lld", file->f_pos);
-
-	/*
-	 * Don't set reghost flag if:
-	 * 1) f_pos is larger than zero -- we've already been here.
-	 * 2) we haven't even enabled reghosting in the 1st place.
-	 * 3) this is the daemon doing a readdir
-	 */
-	if (oz_mode && file->f_pos == 0 && sbi->reghost_enabled)
-		sbi->needs_reghost = 1;
-
-	DPRINTK("needs_reghost = %d", sbi->needs_reghost);
-
-	return dcache_readdir(file, dirent, filldir);
-}
-
 static int autofs4_dir_open(struct inode *inode, struct file *file)
 {
 	struct dentry *dentry = file->f_path.dentry;
-	struct vfsmount *mnt = file->f_path.mnt;
 	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
-	struct dentry *cursor;
-	int status;
-
-	status = dcache_dir_open(inode, file);
-	if (status)
-		goto out;
-
-	cursor = file->private_data;
-	cursor->d_fsdata = NULL;
 
 	DPRINTK("file=%p dentry=%p %.*s",
 		file, dentry, dentry->d_name.len, dentry->d_name.name);
@@ -113,159 +81,32 @@ static int autofs4_dir_open(struct inode *inode, struct file *file)
 	if (autofs4_oz_mode(sbi))
 		goto out;
 
-	if (autofs4_ispending(dentry)) {
-		DPRINTK("dentry busy");
-		dcache_dir_close(inode, file);
-		status = -EBUSY;
-		goto out;
-	}
-
-	status = -ENOENT;
-	if (!d_mountpoint(dentry) && dentry->d_op && dentry->d_op->d_revalidate) {
-		struct nameidata nd;
-		int empty, ret;
-
-		/* In case there are stale directory dentrys from a failed mount */
-		spin_lock(&dcache_lock);
-		empty = list_empty(&dentry->d_subdirs);
+	/*
+	 * An empty directory in an autofs file system is always a
+	 * mount point. The daemon must have failed to mount this
+	 * during lookup so it doesn't exist. This can happen, for
+	 * example, if user space returns an incorrect status for a
+	 * mount request. Otherwise we're doing a readdir on the
+	 * autofs file system so just let the libfs routines handle
+	 * it.
+	 */
+	spin_lock(&dcache_lock);
+	if (!d_mountpoint(dentry) && __simple_empty(dentry)) {
 		spin_unlock(&dcache_lock);
-
-		if (!empty)
-			d_invalidate(dentry);
-
-		nd.flags = LOOKUP_DIRECTORY;
-		ret = (dentry->d_op->d_revalidate)(dentry, &nd);
-
-		if (ret <= 0) {
-			if (ret < 0)
-				status = ret;
-			dcache_dir_close(inode, file);
-			goto out;
-		}
+		return -ENOENT;
 	}
+	spin_unlock(&dcache_lock);
 
-	if (d_mountpoint(dentry)) {
-		struct file *fp = NULL;
-		struct path fp_path = { .dentry = dentry, .mnt = mnt };
-
-		path_get(&fp_path);
-
-		if (!autofs4_follow_mount(&fp_path.mnt, &fp_path.dentry)) {
-			path_put(&fp_path);
-			dcache_dir_close(inode, file);
-			goto out;
-		}
-
-		fp = dentry_open(fp_path.dentry, fp_path.mnt, file->f_flags);
-		status = PTR_ERR(fp);
-		if (IS_ERR(fp)) {
-			dcache_dir_close(inode, file);
-			goto out;
-		}
-		cursor->d_fsdata = fp;
-	}
-	return 0;
-out:
-	return status;
-}
-
-static int autofs4_dir_close(struct inode *inode, struct file *file)
-{
-	struct dentry *dentry = file->f_path.dentry;
-	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
-	struct dentry *cursor = file->private_data;
-	int status = 0;
-
-	DPRINTK("file=%p dentry=%p %.*s",
-		file, dentry, dentry->d_name.len, dentry->d_name.name);
-
-	if (autofs4_oz_mode(sbi))
-		goto out;
-
-	if (autofs4_ispending(dentry)) {
-		DPRINTK("dentry busy");
-		status = -EBUSY;
-		goto out;
-	}
-
-	if (d_mountpoint(dentry)) {
-		struct file *fp = cursor->d_fsdata;
-		if (!fp) {
-			status = -ENOENT;
-			goto out;
-		}
-		filp_close(fp, current->files);
-	}
-out:
-	dcache_dir_close(inode, file);
-	return status;
-}
-
-static int autofs4_dir_readdir(struct file *file, void *dirent, filldir_t filldir)
-{
-	struct dentry *dentry = file->f_path.dentry;
-	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
-	struct dentry *cursor = file->private_data;
-	int status;
-
-	DPRINTK("file=%p dentry=%p %.*s",
-		file, dentry, dentry->d_name.len, dentry->d_name.name);
-
-	if (autofs4_oz_mode(sbi))
-		goto out;
-
-	if (autofs4_ispending(dentry)) {
-		DPRINTK("dentry busy");
-		return -EBUSY;
-	}
-
-	if (d_mountpoint(dentry)) {
-		struct file *fp = cursor->d_fsdata;
-
-		if (!fp)
-			return -ENOENT;
-
-		if (!fp->f_op || !fp->f_op->readdir)
-			goto out;
-
-		status = vfs_readdir(fp, filldir, dirent);
-		file->f_pos = fp->f_pos;
-		if (status)
-			autofs4_copy_atime(file, fp);
-		return status;
-	}
 out:
-	return dcache_readdir(file, dirent, filldir);
+	return dcache_dir_open(inode, file);
 }
 
 static int try_to_fill_dentry(struct dentry *dentry, int flags)
 {
 	struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
 	struct autofs_info *ino = autofs4_dentry_ino(dentry);
-	struct dentry *new;
 	int status;
 
-	/* Block on any pending expiry here; invalidate the dentry
-           when expiration is done to trigger mount request with a new
-           dentry */
-	if (ino && (ino->flags & AUTOFS_INF_EXPIRING)) {
-		DPRINTK("waiting for expire %p name=%.*s",
-			 dentry, dentry->d_name.len, dentry->d_name.name);
-
-		status = autofs4_wait(sbi, dentry, NFY_NONE);
-
-		DPRINTK("expire done status=%d", status);
-
-		/*
-		 * If the directory still exists the mount request must
-		 * continue otherwise it can't be followed at the right
-		 * time during the walk.
-		 */
-		status = d_invalidate(dentry);
-		if (status != -EBUSY)
-			return -EAGAIN;
-	}
-
 	DPRINTK("dentry=%p %.*s ino=%p",
 		 dentry, dentry->d_name.len, dentry->d_name.name, dentry->d_inode);
 
@@ -292,7 +133,8 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
 			return status;
 		}
 	/* Trigger mount for path component or follow link */
-	} else if (flags & (LOOKUP_CONTINUE | LOOKUP_DIRECTORY) ||
+	} else if (dentry->d_flags & DCACHE_AUTOFS_PENDING ||
+			flags & (TRIGGER_FLAGS | TRIGGER_INTENTS) ||
 			current->link_count) {
 		DPRINTK("waiting for mount name=%.*s",
 			dentry->d_name.len, dentry->d_name.name);
@@ -320,26 +162,6 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
 	dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
 	spin_unlock(&dentry->d_lock);
 
-	/*
-	 * The dentry that is passed in from lookup may not be the one
-	 * we end up using, as mkdir can create a new one.  If this
-	 * happens, and another process tries the lookup at the same time,
-	 * it will set the PENDING flag on this new dentry, but add itself
-	 * to our waitq.  Then, if after the lookup succeeds, the first
-	 * process that requested the mount performs another lookup of the
-	 * same directory, it will show up as still pending!  So, we need
-	 * to redo the lookup here and clear pending on that dentry.
-	 */
-	if (d_unhashed(dentry)) {
-		new = d_lookup(dentry->d_parent, &dentry->d_name);
-		if (new) {
-			spin_lock(&new->d_lock);
-			new->d_flags &= ~DCACHE_AUTOFS_PENDING;
-			spin_unlock(&new->d_lock);
-			dput(new);
-		}
-	}
-
 	return 0;
 }
 
@@ -355,51 +177,63 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd)
 	DPRINTK("dentry=%p %.*s oz_mode=%d nd->flags=%d",
 		dentry, dentry->d_name.len, dentry->d_name.name, oz_mode,
 		nd->flags);
-
-	/* If it's our master or we shouldn't trigger a mount we're done */
-	lookup_type = nd->flags & (LOOKUP_CONTINUE | LOOKUP_DIRECTORY);
-	if (oz_mode || !lookup_type)
+	/*
+	 * For an expire of a covered direct or offset mount we need
+	 * to beeak out of follow_down() at the autofs mount trigger
+	 * (d_mounted--), so we can see the expiring flag, and manage
+	 * the blocking and following here until the expire is completed.
+	 */
+	if (oz_mode) {
+		spin_lock(&sbi->fs_lock);
+		if (ino->flags & AUTOFS_INF_EXPIRING) {
+			spin_unlock(&sbi->fs_lock);
+			/* Follow down to our covering mount. */
+			if (!follow_down(&nd->path.mnt, &nd->path.dentry))
+				goto done;
+			goto follow;
+		}
+		spin_unlock(&sbi->fs_lock);
 		goto done;
+	}
 
-	/* If an expire request is pending wait for it. */
-	if (ino && (ino->flags & AUTOFS_INF_EXPIRING)) {
-		DPRINTK("waiting for active request %p name=%.*s",
-			dentry, dentry->d_name.len, dentry->d_name.name);
-
-		status = autofs4_wait(sbi, dentry, NFY_NONE);
+	/* If an expire request is pending everyone must wait. */
+	autofs4_expire_wait(dentry);
 
-		DPRINTK("request done status=%d", status);
-	}
+	/* We trigger a mount for almost all flags */
+	lookup_type = nd->flags & (TRIGGER_FLAGS | TRIGGER_INTENTS);
+	if (!(lookup_type || dentry->d_flags & DCACHE_AUTOFS_PENDING))
+		goto follow;
 
 	/*
-	 * If the dentry contains directories then it is an
-	 * autofs multi-mount with no root mount offset. So
-	 * don't try to mount it again.
+	 * If the dentry contains directories then it is an autofs
+	 * multi-mount with no root mount offset. So don't try to
+	 * mount it again.
 	 */
 	spin_lock(&dcache_lock);
-	if (!d_mountpoint(dentry) && __simple_empty(dentry)) {
+	if (dentry->d_flags & DCACHE_AUTOFS_PENDING ||
+	    (!d_mountpoint(dentry) && __simple_empty(dentry))) {
 		spin_unlock(&dcache_lock);
 
 		status = try_to_fill_dentry(dentry, 0);
 		if (status)
 			goto out_error;
 
-		/*
-		 * The mount succeeded but if there is no root mount
-		 * it must be an autofs multi-mount with no root offset
-		 * so we don't need to follow the mount.
-		 */
-		if (d_mountpoint(dentry)) {
-			if (!autofs4_follow_mount(&nd->path.mnt,
-						  &nd->path.dentry)) {
-				status = -ENOENT;
-				goto out_error;
-			}
-		}
-
-		goto done;
+		goto follow;
 	}
 	spin_unlock(&dcache_lock);
+follow:
+	/*
+	 * If there is no root mount it must be an autofs
+	 * multi-mount with no root offset so we don't need
+	 * to follow it.
+	 */
+	if (d_mountpoint(dentry)) {
+		if (!autofs4_follow_mount(&nd->path.mnt,
+					  &nd->path.dentry)) {
+			status = -ENOENT;
+			goto out_error;
+		}
+	}
 
 done:
 	return NULL;
@@ -424,12 +258,23 @@ static int autofs4_revalidate(struct dentry *dentry, struct nameidata *nd)
 	int status = 1;
 
 	/* Pending dentry */
+	spin_lock(&sbi->fs_lock);
 	if (autofs4_ispending(dentry)) {
 		/* The daemon never causes a mount to trigger */
+		spin_unlock(&sbi->fs_lock);
+
 		if (oz_mode)
 			return 1;
 
 		/*
+		 * If the directory has gone away due to an expire
+		 * we have been called as ->d_revalidate() and so
+		 * we need to return false and proceed to ->lookup().
+		 */
+		if (autofs4_expire_wait(dentry) == -EAGAIN)
+			return 0;
+
+		/*
 		 * A zero status is success otherwise we have a
 		 * negative error code.
 		 */
@@ -437,17 +282,9 @@ static int autofs4_revalidate(struct dentry *dentry, struct nameidata *nd)
 		if (status == 0)
 			return 1;
 
-		/*
-		 * A status of EAGAIN here means that the dentry has gone
-		 * away while waiting for an expire to complete. If we are
-		 * racing with expire lookup will wait for it so this must
-		 * be a revalidate and we need to send it to lookup.
-		 */
-		if (status == -EAGAIN)
-			return 0;
-
 		return status;
 	}
+	spin_unlock(&sbi->fs_lock);
 
 	/* Negative dentry.. invalidate if "old" */
 	if (dentry->d_inode == NULL)
@@ -461,6 +298,7 @@ static int autofs4_revalidate(struct dentry *dentry, struct nameidata *nd)
 		DPRINTK("dentry=%p %.*s, emptydir",
 			 dentry, dentry->d_name.len, dentry->d_name.name);
 		spin_unlock(&dcache_lock);
+
 		/* The daemon never causes a mount to trigger */
 		if (oz_mode)
 			return 1;
@@ -493,10 +331,12 @@ void autofs4_dentry_release(struct dentry *de)
 		struct autofs_sb_info *sbi = autofs4_sbi(de->d_sb);
 
 		if (sbi) {
-			spin_lock(&sbi->rehash_lock);
-			if (!list_empty(&inf->rehash))
-				list_del(&inf->rehash);
-			spin_unlock(&sbi->rehash_lock);
+			spin_lock(&sbi->lookup_lock);
+			if (!list_empty(&inf->active))
+				list_del(&inf->active);
+			if (!list_empty(&inf->expiring))
+				list_del(&inf->expiring);
+			spin_unlock(&sbi->lookup_lock);
 		}
 
 		inf->dentry = NULL;
@@ -518,7 +358,7 @@ static struct dentry_operations autofs4_dentry_operations = {
 	.d_release	= autofs4_dentry_release,
 };
 
-static struct dentry *autofs4_lookup_unhashed(struct autofs_sb_info *sbi, struct dentry *parent, struct qstr *name)
+static struct dentry *autofs4_lookup_active(struct autofs_sb_info *sbi, struct dentry *parent, struct qstr *name)
 {
 	unsigned int len = name->len;
 	unsigned int hash = name->hash;
@@ -526,14 +366,66 @@ static struct dentry *autofs4_lookup_unhashed(struct autofs_sb_info *sbi, struct
 	struct list_head *p, *head;
 
 	spin_lock(&dcache_lock);
-	spin_lock(&sbi->rehash_lock);
-	head = &sbi->rehash_list;
+	spin_lock(&sbi->lookup_lock);
+	head = &sbi->active_list;
 	list_for_each(p, head) {
 		struct autofs_info *ino;
 		struct dentry *dentry;
 		struct qstr *qstr;
 
-		ino = list_entry(p, struct autofs_info, rehash);
+		ino = list_entry(p, struct autofs_info, active);
+		dentry = ino->dentry;
+
+		spin_lock(&dentry->d_lock);
+
+		/* Already gone? */
+		if (atomic_read(&dentry->d_count) == 0)
+			goto next;
+
+		qstr = &dentry->d_name;
+
+		if (dentry->d_name.hash != hash)
+			goto next;
+		if (dentry->d_parent != parent)
+			goto next;
+
+		if (qstr->len != len)
+			goto next;
+		if (memcmp(qstr->name, str, len))
+			goto next;
+
+		if (d_unhashed(dentry)) {
+			dget(dentry);
+			spin_unlock(&dentry->d_lock);
+			spin_unlock(&sbi->lookup_lock);
+			spin_unlock(&dcache_lock);
+			return dentry;
+		}
+next:
+		spin_unlock(&dentry->d_lock);
+	}
+	spin_unlock(&sbi->lookup_lock);
+	spin_unlock(&dcache_lock);
+
+	return NULL;
+}
+
+static struct dentry *autofs4_lookup_expiring(struct autofs_sb_info *sbi, struct dentry *parent, struct qstr *name)
+{
+	unsigned int len = name->len;
+	unsigned int hash = name->hash;
+	const unsigned char *str = name->name;
+	struct list_head *p, *head;
+
+	spin_lock(&dcache_lock);
+	spin_lock(&sbi->lookup_lock);
+	head = &sbi->expiring_list;
+	list_for_each(p, head) {
+		struct autofs_info *ino;
+		struct dentry *dentry;
+		struct qstr *qstr;
+
+		ino = list_entry(p, struct autofs_info, expiring);
 		dentry = ino->dentry;
 
 		spin_lock(&dentry->d_lock);
@@ -555,33 +447,16 @@ static struct dentry *autofs4_lookup_unhashed(struct autofs_sb_info *sbi, struct
 			goto next;
 
 		if (d_unhashed(dentry)) {
-			struct inode *inode = dentry->d_inode;
-
-			ino = autofs4_dentry_ino(dentry);
-			list_del_init(&ino->rehash);
 			dget(dentry);
-			/*
-			 * Make the rehashed dentry negative so the VFS
-			 * behaves as it should.
-			 */
-			if (inode) {
-				dentry->d_inode = NULL;
-				list_del_init(&dentry->d_alias);
-				spin_unlock(&dentry->d_lock);
-				spin_unlock(&sbi->rehash_lock);
-				spin_unlock(&dcache_lock);
-				iput(inode);
-				return dentry;
-			}
 			spin_unlock(&dentry->d_lock);
-			spin_unlock(&sbi->rehash_lock);
+			spin_unlock(&sbi->lookup_lock);
 			spin_unlock(&dcache_lock);
 			return dentry;
 		}
 next:
 		spin_unlock(&dentry->d_lock);
 	}
-	spin_unlock(&sbi->rehash_lock);
+	spin_unlock(&sbi->lookup_lock);
 	spin_unlock(&dcache_lock);
 
 	return NULL;
@@ -591,7 +466,8 @@ next:
 static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 {
 	struct autofs_sb_info *sbi;
-	struct dentry *unhashed;
+	struct autofs_info *ino;
+	struct dentry *expiring, *unhashed;
 	int oz_mode;
 
 	DPRINTK("name = %.*s",
@@ -607,8 +483,26 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
 	DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d",
 		 current->pid, task_pgrp_nr(current), sbi->catatonic, oz_mode);
 
-	unhashed = autofs4_lookup_unhashed(sbi, dentry->d_parent, &dentry->d_name);
-	if (!unhashed) {
+	expiring = autofs4_lookup_expiring(sbi, dentry->d_parent, &dentry->d_name);
+	if (expiring) {
+		/*
+		 * If we are racing with expire the request might not
+		 * be quite complete but the directory has been removed
+		 * so it must have been successful, so just wait for it.
+		 */
+		ino = autofs4_dentry_ino(expiring);
+		autofs4_expire_wait(expiring);
+		spin_lock(&sbi->lookup_lock);
+		if (!list_empty(&ino->expiring))
+			list_del_init(&ino->expiring);
+		spin_unlock(&sbi->lookup_lock);
+		dput(expiring);
+	}
+
+	unhashed = autofs4_lookup_active(sbi, dentry->d_parent, &dentry->d_name);
+	if (unhashed)
+		dentry = unhashed;
+	else {
 		/*
 		 * Mark the dentry incomplete but don't hash it. We do this
 		 * to serialize our inode creation operations (symlink and
@@ -622,39 +516,34 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
 		 */
 		dentry->d_op = &autofs4_root_dentry_operations;
 
-		dentry->d_fsdata = NULL;
-		d_instantiate(dentry, NULL);
-	} else {
-		struct autofs_info *ino = autofs4_dentry_ino(unhashed);
-		DPRINTK("rehash %p with %p", dentry, unhashed);
 		/*
-		 * If we are racing with expire the request might not
-		 * be quite complete but the directory has been removed
-		 * so it must have been successful, so just wait for it.
-		 * We need to ensure the AUTOFS_INF_EXPIRING flag is clear
-		 * before continuing as revalidate may fail when calling
-		 * try_to_fill_dentry (returning EAGAIN) if we don't.
+		 * And we need to ensure that the same dentry is used for
+		 * all following lookup calls until it is hashed so that
+		 * the dentry flags are persistent throughout the request.
 		 */
-		while (ino && (ino->flags & AUTOFS_INF_EXPIRING)) {
-			DPRINTK("wait for incomplete expire %p name=%.*s",
-				unhashed, unhashed->d_name.len,
-				unhashed->d_name.name);
-			autofs4_wait(sbi, unhashed, NFY_NONE);
-			DPRINTK("request completed");
-		}
-		dentry = unhashed;
+		ino = autofs4_init_ino(NULL, sbi, 0555);
+		if (!ino)
+			return ERR_PTR(-ENOMEM);
+
+		dentry->d_fsdata = ino;
+		ino->dentry = dentry;
+
+		spin_lock(&sbi->lookup_lock);
+		list_add(&ino->active, &sbi->active_list);
+		spin_unlock(&sbi->lookup_lock);
+
+		d_instantiate(dentry, NULL);
 	}
 
 	if (!oz_mode) {
 		spin_lock(&dentry->d_lock);
 		dentry->d_flags |= DCACHE_AUTOFS_PENDING;
 		spin_unlock(&dentry->d_lock);
-	}
-
-	if (dentry->d_op && dentry->d_op->d_revalidate) {
-		mutex_unlock(&dir->i_mutex);
-		(dentry->d_op->d_revalidate)(dentry, nd);
-		mutex_lock(&dir->i_mutex);
+		if (dentry->d_op && dentry->d_op->d_revalidate) {
+			mutex_unlock(&dir->i_mutex);
+			(dentry->d_op->d_revalidate)(dentry, nd);
+			mutex_lock(&dir->i_mutex);
+		}
 	}
 
 	/*
@@ -673,9 +562,11 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
 			    return ERR_PTR(-ERESTARTNOINTR);
 			}
 		}
-		spin_lock(&dentry->d_lock);
-		dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
-		spin_unlock(&dentry->d_lock);
+		if (!oz_mode) {
+			spin_lock(&dentry->d_lock);
+			dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
+			spin_unlock(&dentry->d_lock);
+		}
 	}
 
 	/*
@@ -706,7 +597,7 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
 	}
 
 	if (unhashed)
-		return dentry;
+		return unhashed;
 
 	return NULL;
 }
@@ -728,20 +619,31 @@ static int autofs4_dir_symlink(struct inode *dir,
 		return -EACCES;
 
 	ino = autofs4_init_ino(ino, sbi, S_IFLNK | 0555);
-	if (ino == NULL)
-		return -ENOSPC;
+	if (!ino)
+		return -ENOMEM;
 
-	ino->size = strlen(symname);
-	ino->u.symlink = cp = kmalloc(ino->size + 1, GFP_KERNEL);
+	spin_lock(&sbi->lookup_lock);
+	if (!list_empty(&ino->active))
+		list_del_init(&ino->active);
+	spin_unlock(&sbi->lookup_lock);
 
-	if (cp == NULL) {
-		kfree(ino);
-		return -ENOSPC;
+	ino->size = strlen(symname);
+	cp = kmalloc(ino->size + 1, GFP_KERNEL);
+	if (!cp) {
+		if (!dentry->d_fsdata)
+			kfree(ino);
+		return -ENOMEM;
 	}
 
 	strcpy(cp, symname);
 
 	inode = autofs4_get_inode(dir->i_sb, ino);
+	if (!inode) {
+		kfree(cp);
+		if (!dentry->d_fsdata)
+			kfree(ino);
+		return -ENOMEM;
+	}
 	d_add(dentry, inode);
 
 	if (dir == dir->i_sb->s_root->d_inode)
@@ -757,6 +659,7 @@ static int autofs4_dir_symlink(struct inode *dir,
 		atomic_inc(&p_ino->count);
 	ino->inode = inode;
 
+	ino->u.symlink = cp;
 	dir->i_mtime = CURRENT_TIME;
 
 	return 0;
@@ -769,9 +672,8 @@ static int autofs4_dir_symlink(struct inode *dir,
  * that the file no longer exists. However, doing that means that the
  * VFS layer can turn the dentry into a negative dentry.  We don't want
  * this, because the unlink is probably the result of an expire.
- * We simply d_drop it and add it to a rehash candidates list in the
- * super block, which allows the dentry lookup to reuse it retaining
- * the flags, such as expire in progress, in case we're racing with expire.
+ * We simply d_drop it and add it to a expiring list in the super block,
+ * which allows the dentry lookup to check for an incomplete expire.
  *
  * If a process is blocked on the dentry waiting for the expire to finish,
  * it will invalidate the dentry and try to mount with a new one.
@@ -801,9 +703,10 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
 	dir->i_mtime = CURRENT_TIME;
 
 	spin_lock(&dcache_lock);
-	spin_lock(&sbi->rehash_lock);
-	list_add(&ino->rehash, &sbi->rehash_list);
-	spin_unlock(&sbi->rehash_lock);
+	spin_lock(&sbi->lookup_lock);
+	if (list_empty(&ino->expiring))
+		list_add(&ino->expiring, &sbi->expiring_list);
+	spin_unlock(&sbi->lookup_lock);
 	spin_lock(&dentry->d_lock);
 	__d_drop(dentry);
 	spin_unlock(&dentry->d_lock);
@@ -829,9 +732,10 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
 		spin_unlock(&dcache_lock);
 		return -ENOTEMPTY;
 	}
-	spin_lock(&sbi->rehash_lock);
-	list_add(&ino->rehash, &sbi->rehash_list);
-	spin_unlock(&sbi->rehash_lock);
+	spin_lock(&sbi->lookup_lock);
+	if (list_empty(&ino->expiring))
+		list_add(&ino->expiring, &sbi->expiring_list);
+	spin_unlock(&sbi->lookup_lock);
 	spin_lock(&dentry->d_lock);
 	__d_drop(dentry);
 	spin_unlock(&dentry->d_lock);
@@ -866,10 +770,20 @@ static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 		dentry, dentry->d_name.len, dentry->d_name.name);
 
 	ino = autofs4_init_ino(ino, sbi, S_IFDIR | 0555);
-	if (ino == NULL)
-		return -ENOSPC;
+	if (!ino)
+		return -ENOMEM;
+
+	spin_lock(&sbi->lookup_lock);
+	if (!list_empty(&ino->active))
+		list_del_init(&ino->active);
+	spin_unlock(&sbi->lookup_lock);
 
 	inode = autofs4_get_inode(dir->i_sb, ino);
+	if (!inode) {
+		if (!dentry->d_fsdata)
+			kfree(ino);
+		return -ENOMEM;
+	}
 	d_add(dentry, inode);
 
 	if (dir == dir->i_sb->s_root->d_inode)
@@ -922,44 +836,6 @@ static inline int autofs4_get_protosubver(struct autofs_sb_info *sbi, int __user
 }
 
 /*
- * Tells the daemon whether we need to reghost or not. Also, clears
- * the reghost_needed flag.
- */
-static inline int autofs4_ask_reghost(struct autofs_sb_info *sbi, int __user *p)
-{
-	int status;
-
-	DPRINTK("returning %d", sbi->needs_reghost);
-
-	status = put_user(sbi->needs_reghost, p);
-	if (status)
-		return status;
-
-	sbi->needs_reghost = 0;
-	return 0;
-}
-
-/*
- * Enable / Disable reghosting ioctl() operation
- */
-static inline int autofs4_toggle_reghost(struct autofs_sb_info *sbi, int __user *p)
-{
-	int status;
-	int val;
-
-	status = get_user(val, p);
-
-	DPRINTK("reghost = %d", val);
-
-	if (status)
-		return status;
-
-	/* turn on/off reghosting, with the val */
-	sbi->reghost_enabled = val;
-	return 0;
-}
-
-/*
 * Tells the daemon whether it can umount the autofs mount.
 */
 static inline int autofs4_ask_umount(struct vfsmount *mnt, int __user *p)
@@ -1023,11 +899,6 @@ static int autofs4_root_ioctl(struct inode *inode, struct file *filp,
 	case AUTOFS_IOC_SETTIMEOUT:
 		return autofs4_get_set_timeout(sbi, p);
 
-	case AUTOFS_IOC_TOGGLEREGHOST:
-		return autofs4_toggle_reghost(sbi, p);
-	case AUTOFS_IOC_ASKREGHOST:
-		return autofs4_ask_reghost(sbi, p);
-
 	case AUTOFS_IOC_ASKUMOUNT:
 		return autofs4_ask_umount(filp->f_path.mnt, p);
 
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 75e5955c3f6d..35216d18d8b5 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -28,6 +28,12 @@ void autofs4_catatonic_mode(struct autofs_sb_info *sbi)
 {
 	struct autofs_wait_queue *wq, *nwq;
 
+	mutex_lock(&sbi->wq_mutex);
+	if (sbi->catatonic) {
+		mutex_unlock(&sbi->wq_mutex);
+		return;
+	}
+
 	DPRINTK("entering catatonic mode");
 
 	sbi->catatonic = 1;
@@ -36,13 +42,18 @@ void autofs4_catatonic_mode(struct autofs_sb_info *sbi)
 	while (wq) {
 		nwq = wq->next;
 		wq->status = -ENOENT; /* Magic is gone - report failure */
-		kfree(wq->name);
-		wq->name = NULL;
+		if (wq->name.name) {
+			kfree(wq->name.name);
+			wq->name.name = NULL;
+		}
+		wq->wait_ctr--;
 		wake_up_interruptible(&wq->queue);
 		wq = nwq;
 	}
 	fput(sbi->pipe);	/* Close the pipe */
 	sbi->pipe = NULL;
+	sbi->pipefd = -1;
+	mutex_unlock(&sbi->wq_mutex);
 }
 
 static int autofs4_write(struct file *file, const void *addr, int bytes)
@@ -89,10 +100,11 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
 		union autofs_packet_union v4_pkt;
 		union autofs_v5_packet_union v5_pkt;
 	} pkt;
+	struct file *pipe = NULL;
 	size_t pktsz;
 
 	DPRINTK("wait id = 0x%08lx, name = %.*s, type=%d",
-		wq->wait_queue_token, wq->len, wq->name, type);
+		wq->wait_queue_token, wq->name.len, wq->name.name, type);
 
 	memset(&pkt,0,sizeof pkt); /* For security reasons */
 
@@ -107,9 +119,9 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
 		pktsz = sizeof(*mp);
 
 		mp->wait_queue_token = wq->wait_queue_token;
-		mp->len = wq->len;
-		memcpy(mp->name, wq->name, wq->len);
-		mp->name[wq->len] = '\0';
+		mp->len = wq->name.len;
+		memcpy(mp->name, wq->name.name, wq->name.len);
+		mp->name[wq->name.len] = '\0';
 		break;
 	}
 	case autofs_ptype_expire_multi:
@@ -119,9 +131,9 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
 		pktsz = sizeof(*ep);
 
 		ep->wait_queue_token = wq->wait_queue_token;
-		ep->len = wq->len;
-		memcpy(ep->name, wq->name, wq->len);
-		ep->name[wq->len] = '\0';
+		ep->len = wq->name.len;
+		memcpy(ep->name, wq->name.name, wq->name.len);
+		ep->name[wq->name.len] = '\0';
 		break;
 	}
 	/*
@@ -138,9 +150,9 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
 		pktsz = sizeof(*packet);
 
 		packet->wait_queue_token = wq->wait_queue_token;
-		packet->len = wq->len;
-		memcpy(packet->name, wq->name, wq->len);
-		packet->name[wq->len] = '\0';
+		packet->len = wq->name.len;
+		memcpy(packet->name, wq->name.name, wq->name.len);
+		packet->name[wq->name.len] = '\0';
 		packet->dev = wq->dev;
 		packet->ino = wq->ino;
 		packet->uid = wq->uid;
@@ -154,8 +166,19 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
 		return;
 	}
 
-	if (autofs4_write(sbi->pipe, &pkt, pktsz))
-		autofs4_catatonic_mode(sbi);
+	/* Check if we have become catatonic */
+	mutex_lock(&sbi->wq_mutex);
+	if (!sbi->catatonic) {
+		pipe = sbi->pipe;
+		get_file(pipe);
+	}
+	mutex_unlock(&sbi->wq_mutex);
+
+	if (pipe) {
+		if (autofs4_write(pipe, &pkt, pktsz))
+			autofs4_catatonic_mode(sbi);
+		fput(pipe);
+	}
 }
 
 static int autofs4_getpath(struct autofs_sb_info *sbi,
@@ -191,58 +214,55 @@ static int autofs4_getpath(struct autofs_sb_info *sbi,
 }
 
 static struct autofs_wait_queue *
-autofs4_find_wait(struct autofs_sb_info *sbi,
-		  char *name, unsigned int hash, unsigned int len)
+autofs4_find_wait(struct autofs_sb_info *sbi, struct qstr *qstr)
 {
 	struct autofs_wait_queue *wq;
 
 	for (wq = sbi->queues; wq; wq = wq->next) {
-		if (wq->hash == hash &&
-		    wq->len == len &&
-		    wq->name && !memcmp(wq->name, name, len))
+		if (wq->name.hash == qstr->hash &&
+		    wq->name.len == qstr->len &&
+		    wq->name.name &&
+			 !memcmp(wq->name.name, qstr->name, qstr->len))
 			break;
 	}
 	return wq;
 }
 
-int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
-		enum autofs_notify notify)
+/*
+ * Check if we have a valid request.
+ * Returns
+ * 1 if the request should continue.
+ *   In this case we can return an autofs_wait_queue entry if one is
+ *   found or NULL to idicate a new wait needs to be created.
+ * 0 or a negative errno if the request shouldn't continue.
+ */
+static int validate_request(struct autofs_wait_queue **wait,
+			    struct autofs_sb_info *sbi,
+			    struct qstr *qstr,
+			    struct dentry*dentry, enum autofs_notify notify)
 {
-	struct autofs_info *ino;
 	struct autofs_wait_queue *wq;
-	char *name;
-	unsigned int len = 0;
-	unsigned int hash = 0;
-	int status, type;
-
-	/* In catatonic mode, we don't wait for nobody */
-	if (sbi->catatonic)
-		return -ENOENT;
-	
-	name = kmalloc(NAME_MAX + 1, GFP_KERNEL);
-	if (!name)
-		return -ENOMEM;
+	struct autofs_info *ino;
 
-	/* If this is a direct mount request create a dummy name */
-	if (IS_ROOT(dentry) && (sbi->type & AUTOFS_TYPE_DIRECT))
-		len = sprintf(name, "%p", dentry);
-	else {
-		len = autofs4_getpath(sbi, dentry, &name);
-		if (!len) {
-			kfree(name);
-			return -ENOENT;
-		}
+	/* Wait in progress, continue; */
+	wq = autofs4_find_wait(sbi, qstr);
+	if (wq) {
+		*wait = wq;
+		return 1;
 	}
-	hash = full_name_hash(name, len);
 
-	if (mutex_lock_interruptible(&sbi->wq_mutex)) {
-		kfree(name);
-		return -EINTR;
-	}
+	*wait = NULL;
 
-	wq = autofs4_find_wait(sbi, name, hash, len);
+	/* If we don't yet have any info this is a new request */
 	ino = autofs4_dentry_ino(dentry);
-	if (!wq && ino && notify == NFY_NONE) {
+	if (!ino)
+		return 1;
+
+	/*
+	 * If we've been asked to wait on an existing expire (NFY_NONE)
+	 * but there is no wait in the queue ...
+	 */
+	if (notify == NFY_NONE) {
 		/*
 		 * Either we've betean the pending expire to post it's
 		 * wait or it finished while we waited on the mutex.
@@ -253,13 +273,14 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		while (ino->flags & AUTOFS_INF_EXPIRING) {
 			mutex_unlock(&sbi->wq_mutex);
 			schedule_timeout_interruptible(HZ/10);
-			if (mutex_lock_interruptible(&sbi->wq_mutex)) {
-				kfree(name);
+			if (mutex_lock_interruptible(&sbi->wq_mutex))
 				return -EINTR;
+
+			wq = autofs4_find_wait(sbi, qstr);
+			if (wq) {
+				*wait = wq;
+				return 1;
 			}
-			wq = autofs4_find_wait(sbi, name, hash, len);
-			if (wq)
-				break;
 		}
 
 		/*
@@ -267,18 +288,96 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		 * cases where we wait on NFY_NONE neither depend on the
 		 * return status of the wait.
 		 */
-		if (!wq) {
+		return 0;
+	}
+
+	/*
+	 * If we've been asked to trigger a mount and the request
+	 * completed while we waited on the mutex ...
+	 */
+	if (notify == NFY_MOUNT) {
+		/*
+		 * If the dentry isn't hashed just go ahead and try the
+		 * mount again with a new wait (not much else we can do).
+		*/
+		if (!d_unhashed(dentry)) {
+			/*
+			 * But if the dentry is hashed, that means that we
+			 * got here through the revalidate path.  Thus, we
+			 * need to check if the dentry has been mounted
+			 * while we waited on the wq_mutex. If it has,
+			 * simply return success.
+			 */
+			if (d_mountpoint(dentry))
+				return 0;
+		}
+	}
+
+	return 1;
+}
+
+int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
+		enum autofs_notify notify)
+{
+	struct autofs_wait_queue *wq;
+	struct qstr qstr;
+	char *name;
+	int status, ret, type;
+
+	/* In catatonic mode, we don't wait for nobody */
+	if (sbi->catatonic)
+		return -ENOENT;
+
+	if (!dentry->d_inode) {
+		/*
+		 * A wait for a negative dentry is invalid for certain
+		 * cases. A direct or offset mount "always" has its mount
+		 * point directory created and so the request dentry must
+		 * be positive or the map key doesn't exist. The situation
+		 * is very similar for indirect mounts except only dentrys
+		 * in the root of the autofs file system may be negative.
+		 */
+		if (sbi->type & (AUTOFS_TYPE_DIRECT|AUTOFS_TYPE_OFFSET))
+			return -ENOENT;
+		else if (!IS_ROOT(dentry->d_parent))
+			return -ENOENT;
+	}
+
+	name = kmalloc(NAME_MAX + 1, GFP_KERNEL);
+	if (!name)
+		return -ENOMEM;
+
+	/* If this is a direct mount request create a dummy name */
+	if (IS_ROOT(dentry) && (sbi->type & AUTOFS_TYPE_DIRECT))
+		qstr.len = sprintf(name, "%p", dentry);
+	else {
+		qstr.len = autofs4_getpath(sbi, dentry, &name);
+		if (!qstr.len) {
 			kfree(name);
-			mutex_unlock(&sbi->wq_mutex);
-			return 0;
+			return -ENOENT;
 		}
 	}
+	qstr.name = name;
+	qstr.hash = full_name_hash(name, qstr.len);
+
+	if (mutex_lock_interruptible(&sbi->wq_mutex)) {
+		kfree(qstr.name);
+		return -EINTR;
+	}
+
+	ret = validate_request(&wq, sbi, &qstr, dentry, notify);
+	if (ret <= 0) {
+		if (ret == 0)
+			mutex_unlock(&sbi->wq_mutex);
+		kfree(qstr.name);
+		return ret;
+	}
 
 	if (!wq) {
 		/* Create a new wait queue */
 		wq = kmalloc(sizeof(struct autofs_wait_queue),GFP_KERNEL);
 		if (!wq) {
-			kfree(name);
+			kfree(qstr.name);
 			mutex_unlock(&sbi->wq_mutex);
 			return -ENOMEM;
 		}
@@ -289,9 +388,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		wq->next = sbi->queues;
 		sbi->queues = wq;
 		init_waitqueue_head(&wq->queue);
-		wq->hash = hash;
-		wq->name = name;
-		wq->len = len;
+		memcpy(&wq->name, &qstr, sizeof(struct qstr));
 		wq->dev = autofs4_get_dev(sbi);
 		wq->ino = autofs4_get_ino(sbi);
 		wq->uid = current->uid;
@@ -299,7 +396,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		wq->pid = current->pid;
 		wq->tgid = current->tgid;
 		wq->status = -EINTR; /* Status return if interrupted */
-		atomic_set(&wq->wait_ctr, 2);
+		wq->wait_ctr = 2;
 		mutex_unlock(&sbi->wq_mutex);
 
 		if (sbi->version < 5) {
@@ -319,28 +416,25 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		}
 
 		DPRINTK("new wait id = 0x%08lx, name = %.*s, nfy=%d\n",
-			(unsigned long) wq->wait_queue_token, wq->len, wq->name, notify);
+			(unsigned long) wq->wait_queue_token, wq->name.len,
+			wq->name.name, notify);
 
 		/* autofs4_notify_daemon() may block */
 		autofs4_notify_daemon(sbi, wq, type);
 	} else {
-		atomic_inc(&wq->wait_ctr);
+		wq->wait_ctr++;
 		mutex_unlock(&sbi->wq_mutex);
-		kfree(name);
+		kfree(qstr.name);
 		DPRINTK("existing wait id = 0x%08lx, name = %.*s, nfy=%d",
-			(unsigned long) wq->wait_queue_token, wq->len, wq->name, notify);
-	}
-
-	/* wq->name is NULL if and only if the lock is already released */
-
-	if (sbi->catatonic) {
-		/* We might have slept, so check again for catatonic mode */
-		wq->status = -ENOENT;
-		kfree(wq->name);
-		wq->name = NULL;
+			(unsigned long) wq->wait_queue_token, wq->name.len,
+			wq->name.name, notify);
 	}
 
-	if (wq->name) {
+	/*
+	 * wq->name.name is NULL iff the lock is already released
+	 * or the mount has been made catatonic.
+	 */
+	if (wq->name.name) {
 		/* Block all but "shutdown" signals while waiting */
 		sigset_t oldset;
 		unsigned long irqflags;
@@ -351,7 +445,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		recalc_sigpending();
 		spin_unlock_irqrestore(&current->sighand->siglock, irqflags);
 
-		wait_event_interruptible(wq->queue, wq->name == NULL);
+		wait_event_interruptible(wq->queue, wq->name.name == NULL);
 
 		spin_lock_irqsave(&current->sighand->siglock, irqflags);
 		current->blocked = oldset;
@@ -364,8 +458,10 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 	status = wq->status;
 
 	/* Are we the last process to need status? */
-	if (atomic_dec_and_test(&wq->wait_ctr))
+	mutex_lock(&sbi->wq_mutex);
+	if (!--wq->wait_ctr)
 		kfree(wq);
+	mutex_unlock(&sbi->wq_mutex);
 
 	return status;
 }
@@ -387,16 +483,13 @@ int autofs4_wait_release(struct autofs_sb_info *sbi, autofs_wqt_t wait_queue_tok
 	}
 
 	*wql = wq->next;	/* Unlink from chain */
-	mutex_unlock(&sbi->wq_mutex);
-	kfree(wq->name);
-	wq->name = NULL;	/* Do not wait on this queue */
-
+	kfree(wq->name.name);
+	wq->name.name = NULL;	/* Do not wait on this queue */
 	wq->status = status;
-
-	if (atomic_dec_and_test(&wq->wait_ctr))	/* Is anyone still waiting for this guy? */
+	wake_up_interruptible(&wq->queue);
+	if (!--wq->wait_ctr)
 		kfree(wq);
-	else
-		wake_up_interruptible(&wq->queue);
+	mutex_unlock(&sbi->wq_mutex);
 
 	return 0;
 }
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index f1c2ea8342f5..5f1538c03b1b 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -243,8 +243,7 @@ static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
 	return -EIO;
 }
 
-static int bad_inode_permission(struct inode *inode, int mask,
-			struct nameidata *nd)
+static int bad_inode_permission(struct inode *inode, int mask)
 {
 	return -EIO;
 }
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index e8717de3bab3..02c6e62b72f8 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -289,7 +289,7 @@ befs_destroy_inode(struct inode *inode)
         kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
         struct befs_inode_info *bi = (struct befs_inode_info *) foo;
 
diff --git a/fs/bfs/bfs.h b/fs/bfs/bfs.h
index 70f5d3a8eede..7109e451abf7 100644
--- a/fs/bfs/bfs.h
+++ b/fs/bfs/bfs.h
@@ -16,8 +16,9 @@ struct bfs_sb_info {
 	unsigned long si_freei;
 	unsigned long si_lf_eblk;
 	unsigned long si_lasti;
-	unsigned long * si_imap;
-	struct buffer_head * si_sbh;		/* buffer header w/superblock */
+	unsigned long *si_imap;
+	struct buffer_head *si_sbh;		/* buffer header w/superblock */
+	struct mutex bfs_lock;
 };
 
 /*
diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index 034950cb3cbe..87ee5ccee348 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -32,16 +32,17 @@ static int bfs_readdir(struct file *f, void *dirent, filldir_t filldir)
 	struct inode *dir = f->f_path.dentry->d_inode;
 	struct buffer_head *bh;
 	struct bfs_dirent *de;
+	struct bfs_sb_info *info = BFS_SB(dir->i_sb);
 	unsigned int offset;
 	int block;
 
-	lock_kernel();
+	mutex_lock(&info->bfs_lock);
 
 	if (f->f_pos & (BFS_DIRENT_SIZE - 1)) {
 		printf("Bad f_pos=%08lx for %s:%08lx\n",
 					(unsigned long)f->f_pos,
 					dir->i_sb->s_id, dir->i_ino);
-		unlock_kernel();
+		mutex_unlock(&info->bfs_lock);
 		return -EBADF;
 	}
 
@@ -61,7 +62,7 @@ static int bfs_readdir(struct file *f, void *dirent, filldir_t filldir)
 						le16_to_cpu(de->ino),
 						DT_UNKNOWN) < 0) {
 					brelse(bh);
-					unlock_kernel();
+					mutex_unlock(&info->bfs_lock);
 					return 0;
 				}
 			}
@@ -71,7 +72,7 @@ static int bfs_readdir(struct file *f, void *dirent, filldir_t filldir)
 		brelse(bh);
 	}
 
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	return 0;	
 }
 
@@ -95,10 +96,10 @@ static int bfs_create(struct inode *dir, struct dentry *dentry, int mode,
 	inode = new_inode(s);
 	if (!inode)
 		return -ENOSPC;
-	lock_kernel();
+	mutex_lock(&info->bfs_lock);
 	ino = find_first_zero_bit(info->si_imap, info->si_lasti);
 	if (ino > info->si_lasti) {
-		unlock_kernel();
+		mutex_unlock(&info->bfs_lock);
 		iput(inode);
 		return -ENOSPC;
 	}
@@ -125,10 +126,10 @@ static int bfs_create(struct inode *dir, struct dentry *dentry, int mode,
 	if (err) {
 		inode_dec_link_count(inode);
 		iput(inode);
-		unlock_kernel();
+		mutex_unlock(&info->bfs_lock);
 		return err;
 	}
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	d_instantiate(dentry, inode);
 	return 0;
 }
@@ -139,22 +140,23 @@ static struct dentry *bfs_lookup(struct inode *dir, struct dentry *dentry,
 	struct inode *inode = NULL;
 	struct buffer_head *bh;
 	struct bfs_dirent *de;
+	struct bfs_sb_info *info = BFS_SB(dir->i_sb);
 
 	if (dentry->d_name.len > BFS_NAMELEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	lock_kernel();
+	mutex_lock(&info->bfs_lock);
 	bh = bfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de);
 	if (bh) {
 		unsigned long ino = (unsigned long)le16_to_cpu(de->ino);
 		brelse(bh);
 		inode = bfs_iget(dir->i_sb, ino);
 		if (IS_ERR(inode)) {
-			unlock_kernel();
+			mutex_unlock(&info->bfs_lock);
 			return ERR_CAST(inode);
 		}
 	}
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	d_add(dentry, inode);
 	return NULL;
 }
@@ -163,13 +165,14 @@ static int bfs_link(struct dentry *old, struct inode *dir,
 						struct dentry *new)
 {
 	struct inode *inode = old->d_inode;
+	struct bfs_sb_info *info = BFS_SB(inode->i_sb);
 	int err;
 
-	lock_kernel();
+	mutex_lock(&info->bfs_lock);
 	err = bfs_add_entry(dir, new->d_name.name, new->d_name.len,
 							inode->i_ino);
 	if (err) {
-		unlock_kernel();
+		mutex_unlock(&info->bfs_lock);
 		return err;
 	}
 	inc_nlink(inode);
@@ -177,19 +180,19 @@ static int bfs_link(struct dentry *old, struct inode *dir,
 	mark_inode_dirty(inode);
 	atomic_inc(&inode->i_count);
 	d_instantiate(new, inode);
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	return 0;
 }
 
 static int bfs_unlink(struct inode *dir, struct dentry *dentry)
 {
 	int error = -ENOENT;
-	struct inode *inode;
+	struct inode *inode = dentry->d_inode;
 	struct buffer_head *bh;
 	struct bfs_dirent *de;
+	struct bfs_sb_info *info = BFS_SB(inode->i_sb);
 
-	inode = dentry->d_inode;
-	lock_kernel();
+	mutex_lock(&info->bfs_lock);
 	bh = bfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len, &de);
 	if (!bh || (le16_to_cpu(de->ino) != inode->i_ino))
 		goto out_brelse;
@@ -210,7 +213,7 @@ static int bfs_unlink(struct inode *dir, struct dentry *dentry)
 
 out_brelse:
 	brelse(bh);
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	return error;
 }
 
@@ -220,6 +223,7 @@ static int bfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	struct inode *old_inode, *new_inode;
 	struct buffer_head *old_bh, *new_bh;
 	struct bfs_dirent *old_de, *new_de;
+	struct bfs_sb_info *info;
 	int error = -ENOENT;
 
 	old_bh = new_bh = NULL;
@@ -227,7 +231,9 @@ static int bfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	if (S_ISDIR(old_inode->i_mode))
 		return -EINVAL;
 
-	lock_kernel();
+	info = BFS_SB(old_inode->i_sb);
+
+	mutex_lock(&info->bfs_lock);
 	old_bh = bfs_find_entry(old_dir, 
 				old_dentry->d_name.name, 
 				old_dentry->d_name.len, &old_de);
@@ -264,7 +270,7 @@ static int bfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	error = 0;
 
 end_rename:
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	brelse(old_bh);
 	brelse(new_bh);
 	return error;
diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index b11e63e8fbcd..6a021265f018 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -99,7 +99,7 @@ static int bfs_get_block(struct inode *inode, sector_t block,
 		return -ENOSPC;
 
 	/* The rest has to be protected against itself. */
-	lock_kernel();
+	mutex_lock(&info->bfs_lock);
 
 	/*
 	 * If the last data block for this file is the last allocated
@@ -151,7 +151,7 @@ static int bfs_get_block(struct inode *inode, sector_t block,
 	mark_buffer_dirty(sbh);
 	map_bh(bh_result, sb, phys);
 out:
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	return err;
 }
 
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index 8db623838b50..0ed57b5ee012 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -104,6 +104,7 @@ static int bfs_write_inode(struct inode *inode, int unused)
 	struct bfs_inode *di;
 	struct buffer_head *bh;
 	int block, off;
+	struct bfs_sb_info *info = BFS_SB(inode->i_sb);
 
         dprintf("ino=%08x\n", ino);
 
@@ -112,13 +113,13 @@ static int bfs_write_inode(struct inode *inode, int unused)
 		return -EIO;
 	}
 
-	lock_kernel();
+	mutex_lock(&info->bfs_lock);
 	block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
 	bh = sb_bread(inode->i_sb, block);
 	if (!bh) {
 		printf("Unable to read inode %s:%08x\n",
 				inode->i_sb->s_id, ino);
-		unlock_kernel();
+		mutex_unlock(&info->bfs_lock);
 		return -EIO;
 	}
 
@@ -145,7 +146,7 @@ static int bfs_write_inode(struct inode *inode, int unused)
 
 	mark_buffer_dirty(bh);
 	brelse(bh);
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	return 0;
 }
 
@@ -170,7 +171,7 @@ static void bfs_delete_inode(struct inode *inode)
 	
 	inode->i_size = 0;
 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
-	lock_kernel();
+	mutex_lock(&info->bfs_lock);
 	mark_inode_dirty(inode);
 
 	block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
@@ -178,7 +179,7 @@ static void bfs_delete_inode(struct inode *inode)
 	if (!bh) {
 		printf("Unable to read inode %s:%08lx\n",
 					inode->i_sb->s_id, ino);
-		unlock_kernel();
+		mutex_unlock(&info->bfs_lock);
 		return;
 	}
 	off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
@@ -204,14 +205,16 @@ static void bfs_delete_inode(struct inode *inode)
 		info->si_lf_eblk = bi->i_sblock - 1;
 		mark_buffer_dirty(info->si_sbh);
 	}
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 	clear_inode(inode);
 }
 
 static void bfs_put_super(struct super_block *s)
 {
 	struct bfs_sb_info *info = BFS_SB(s);
+
 	brelse(info->si_sbh);
+	mutex_destroy(&info->bfs_lock);
 	kfree(info->si_imap);
 	kfree(info);
 	s->s_fs_info = NULL;
@@ -236,11 +239,13 @@ static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 
 static void bfs_write_super(struct super_block *s)
 {
-	lock_kernel();
+	struct bfs_sb_info *info = BFS_SB(s);
+
+	mutex_lock(&info->bfs_lock);
 	if (!(s->s_flags & MS_RDONLY))
-		mark_buffer_dirty(BFS_SB(s)->si_sbh);
+		mark_buffer_dirty(info->si_sbh);
 	s->s_dirt = 0;
-	unlock_kernel();
+	mutex_unlock(&info->bfs_lock);
 }
 
 static struct kmem_cache *bfs_inode_cachep;
@@ -259,7 +264,7 @@ static void bfs_destroy_inode(struct inode *inode)
 	kmem_cache_free(bfs_inode_cachep, BFS_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct bfs_inode_info *bi = foo;
 
@@ -380,7 +385,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
 		struct bfs_inode *di;
 		int block = (i - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1;
 		int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
-		unsigned long sblock, eblock;
+		unsigned long eblock;
 
 		if (!off) {
 			brelse(bh);
@@ -399,7 +404,6 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
 		set_bit(i, info->si_imap);
 		info->si_freeb -= BFS_FILEBLOCKS(di);
 
-		sblock =  le32_to_cpu(di->i_sblock);
 		eblock =  le32_to_cpu(di->i_eblock);
 		if (eblock > info->si_lf_eblk)
 			info->si_lf_eblk = eblock;
@@ -410,6 +414,7 @@ static int bfs_fill_super(struct super_block *s, void *data, int silent)
 		s->s_dirt = 1;
 	} 
 	dump_imap("read_super", s);
+	mutex_init(&info->bfs_lock);
 	return 0;
 
 out:
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index ba4cddb92f1d..204cfd1d7676 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -444,12 +444,6 @@ beyond_if:
 	regs->gp = ex.a_gpvalue;
 #endif
 	start_thread(regs, ex.a_entry, current->mm->start_stack);
-	if (unlikely(current->ptrace & PT_PTRACED)) {
-		if (current->ptrace & PT_TRACE_EXEC)
-			ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
-		else
-			send_sig(SIGTRAP, current, 0);
-	}
 	return 0;
 }
 
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 639d2d8b5710..655ed8d30a86 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -131,6 +131,15 @@ static int padzero(unsigned long elf_bss)
 #define STACK_ALLOC(sp, len) ({ sp -= len ; sp; })
 #endif
 
+#ifndef ELF_BASE_PLATFORM
+/*
+ * AT_BASE_PLATFORM indicates the "real" hardware/microarchitecture.
+ * If the arch defines ELF_BASE_PLATFORM (in asm/elf.h), the value
+ * will be copied to the user stack in the same manner as AT_PLATFORM.
+ */
+#define ELF_BASE_PLATFORM NULL
+#endif
+
 static int
 create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
 		unsigned long load_addr, unsigned long interp_load_addr)
@@ -142,7 +151,9 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
 	elf_addr_t __user *envp;
 	elf_addr_t __user *sp;
 	elf_addr_t __user *u_platform;
+	elf_addr_t __user *u_base_platform;
 	const char *k_platform = ELF_PLATFORM;
+	const char *k_base_platform = ELF_BASE_PLATFORM;
 	int items;
 	elf_addr_t *elf_info;
 	int ei_index = 0;
@@ -172,6 +183,19 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
 			return -EFAULT;
 	}
 
+	/*
+	 * If this architecture has a "base" platform capability
+	 * string, copy it to userspace.
+	 */
+	u_base_platform = NULL;
+	if (k_base_platform) {
+		size_t len = strlen(k_base_platform) + 1;
+
+		u_base_platform = (elf_addr_t __user *)STACK_ALLOC(p, len);
+		if (__copy_to_user(u_base_platform, k_base_platform, len))
+			return -EFAULT;
+	}
+
 	/* Create the ELF interpreter info */
 	elf_info = (elf_addr_t *)current->mm->saved_auxv;
 	/* update AT_VECTOR_SIZE_BASE if the number of NEW_AUX_ENT() changes */
@@ -209,6 +233,10 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
 		NEW_AUX_ENT(AT_PLATFORM,
 			    (elf_addr_t)(unsigned long)u_platform);
 	}
+	if (k_base_platform) {
+		NEW_AUX_ENT(AT_BASE_PLATFORM,
+			    (elf_addr_t)(unsigned long)u_base_platform);
+	}
 	if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) {
 		NEW_AUX_ENT(AT_EXECFD, bprm->interp_data);
 	}
@@ -975,12 +1003,6 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 #endif
 
 	start_thread(regs, elf_entry, bprm->p);
-	if (unlikely(current->ptrace & PT_PTRACED)) {
-		if (current->ptrace & PT_TRACE_EXEC)
-			ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
-		else
-			send_sig(SIGTRAP, current, 0);
-	}
 	retval = 0;
 out:
 	kfree(loc);
@@ -1478,7 +1500,7 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
 	const struct user_regset_view *view = task_user_regset_view(dump_task);
 	struct elf_thread_core_info *t;
 	struct elf_prpsinfo *psinfo;
-	struct task_struct *g, *p;
+	struct core_thread *ct;
 	unsigned int i;
 
 	info->size = 0;
@@ -1517,31 +1539,26 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
 	/*
 	 * Allocate a structure for each thread.
 	 */
-	rcu_read_lock();
-	do_each_thread(g, p)
-		if (p->mm == dump_task->mm) {
-			t = kzalloc(offsetof(struct elf_thread_core_info,
-					     notes[info->thread_notes]),
-				    GFP_ATOMIC);
-			if (unlikely(!t)) {
-				rcu_read_unlock();
-				return 0;
-			}
-			t->task = p;
-			if (p == dump_task || !info->thread) {
-				t->next = info->thread;
-				info->thread = t;
-			} else {
-				/*
-				 * Make sure to keep the original task at
-				 * the head of the list.
-				 */
-				t->next = info->thread->next;
-				info->thread->next = t;
-			}
+	for (ct = &dump_task->mm->core_state->dumper; ct; ct = ct->next) {
+		t = kzalloc(offsetof(struct elf_thread_core_info,
+				     notes[info->thread_notes]),
+			    GFP_KERNEL);
+		if (unlikely(!t))
+			return 0;
+
+		t->task = ct->task;
+		if (ct->task == dump_task || !info->thread) {
+			t->next = info->thread;
+			info->thread = t;
+		} else {
+			/*
+			 * Make sure to keep the original task at
+			 * the head of the list.
+			 */
+			t->next = info->thread->next;
+			info->thread->next = t;
 		}
-	while_each_thread(g, p);
-	rcu_read_unlock();
+	}
 
 	/*
 	 * Now fill in each thread's information.
@@ -1688,7 +1705,6 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
 {
 #define	NUM_NOTES	6
 	struct list_head *t;
-	struct task_struct *g, *p;
 
 	info->notes = NULL;
 	info->prstatus = NULL;
@@ -1720,20 +1736,19 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
 
 	info->thread_status_size = 0;
 	if (signr) {
+		struct core_thread *ct;
 		struct elf_thread_status *ets;
-		rcu_read_lock();
-		do_each_thread(g, p)
-			if (current->mm == p->mm && current != p) {
-				ets = kzalloc(sizeof(*ets), GFP_ATOMIC);
-				if (!ets) {
-					rcu_read_unlock();
-					return 0;
-				}
-				ets->thread = p;
-				list_add(&ets->list, &info->thread_list);
-			}
-		while_each_thread(g, p);
-		rcu_read_unlock();
+
+		for (ct = current->mm->core_state->dumper.next;
+						ct; ct = ct->next) {
+			ets = kzalloc(sizeof(*ets), GFP_KERNEL);
+			if (!ets)
+				return 0;
+
+			ets->thread = ct->task;
+			list_add(&ets->list, &info->thread_list);
+		}
+
 		list_for_each(t, &info->thread_list) {
 			int sz;
 
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index d051a32e6270..fdeadab2f18b 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -433,13 +433,6 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm,
 	entryaddr = interp_params.entry_addr ?: exec_params.entry_addr;
 	start_thread(regs, entryaddr, current->mm->start_stack);
 
-	if (unlikely(current->ptrace & PT_PTRACED)) {
-		if (current->ptrace & PT_TRACE_EXEC)
-			ptrace_notify((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
-		else
-			send_sig(SIGTRAP, current, 0);
-	}
-
 	retval = 0;
 
 error:
@@ -1573,7 +1566,6 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs,
 	struct memelfnote *notes = NULL;
 	struct elf_prstatus *prstatus = NULL;	/* NT_PRSTATUS */
 	struct elf_prpsinfo *psinfo = NULL;	/* NT_PRPSINFO */
- 	struct task_struct *g, *p;
  	LIST_HEAD(thread_list);
  	struct list_head *t;
 	elf_fpregset_t *fpu = NULL;
@@ -1622,20 +1614,19 @@ static int elf_fdpic_core_dump(long signr, struct pt_regs *regs,
 #endif
 
 	if (signr) {
+		struct core_thread *ct;
 		struct elf_thread_status *tmp;
-		rcu_read_lock();
-		do_each_thread(g,p)
-			if (current->mm == p->mm && current != p) {
-				tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC);
-				if (!tmp) {
-					rcu_read_unlock();
-					goto cleanup;
-				}
-				tmp->thread = p;
-				list_add(&tmp->list, &thread_list);
-			}
-		while_each_thread(g,p);
-		rcu_read_unlock();
+
+		for (ct = current->mm->core_state->dumper.next;
+						ct; ct = ct->next) {
+			tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
+			if (!tmp)
+				goto cleanup;
+
+			tmp->thread = ct->task;
+			list_add(&tmp->list, &thread_list);
+		}
+
 		list_for_each(t, &thread_list) {
 			struct elf_thread_status *tmp;
 			int sz;
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 2cb1acda3a82..56372ecf1690 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -920,9 +920,6 @@ static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	
 	start_thread(regs, start_addr, current->mm->start_stack);
 
-	if (current->ptrace & PT_PTRACED)
-		send_sig(SIGTRAP, current, 0);
-
 	return 0;
 }
 
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 7191306367c5..756205314c24 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -27,6 +27,7 @@
 #include <linux/namei.h>
 #include <linux/mount.h>
 #include <linux/syscalls.h>
+#include <linux/fs.h>
 
 #include <asm/uaccess.h>
 
@@ -535,31 +536,16 @@ static ssize_t
 bm_entry_read(struct file * file, char __user * buf, size_t nbytes, loff_t *ppos)
 {
 	Node *e = file->f_path.dentry->d_inode->i_private;
-	loff_t pos = *ppos;
 	ssize_t res;
 	char *page;
-	int len;
 
 	if (!(page = (char*) __get_free_page(GFP_KERNEL)))
 		return -ENOMEM;
 
 	entry_status(e, page);
-	len = strlen(page);
 
-	res = -EINVAL;
-	if (pos < 0)
-		goto out;
-	res = 0;
-	if (pos >= len)
-		goto out;
-	if (len < pos + nbytes)
-		nbytes = len - pos;
-	res = -EFAULT;
-	if (copy_to_user(buf, page + pos, nbytes))
-		goto out;
-	*ppos = pos + nbytes;
-	res = nbytes;
-out:
+	res = simple_read_from_buffer(buf, nbytes, ppos, page, strlen(page));
+
 	free_page((unsigned long) page);
 	return res;
 }
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c
index fdc36bfd6a7b..68be580ba289 100644
--- a/fs/binfmt_som.c
+++ b/fs/binfmt_som.c
@@ -274,8 +274,6 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	map_hpux_gateway_page(current,current->mm);
 
 	start_thread_som(regs, som_entry, bprm->p);
-	if (current->ptrace & PT_PTRACED)
-		send_sig(SIGTRAP, current, 0);
 	return 0;
 
 	/* error cleanup */
diff --git a/fs/bio.c b/fs/bio.c
index 88322b066acb..25f1af0d81e5 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -721,12 +721,8 @@ static struct bio *__bio_map_user_iov(struct request_queue *q,
 		const int local_nr_pages = end - start;
 		const int page_limit = cur_page + local_nr_pages;
 		
-		down_read(&current->mm->mmap_sem);
-		ret = get_user_pages(current, current->mm, uaddr,
-				     local_nr_pages,
-				     write_to_vm, 0, &pages[cur_page], NULL);
-		up_read(&current->mm->mmap_sem);
-
+		ret = get_user_pages_fast(uaddr, local_nr_pages,
+				write_to_vm, &pages[cur_page]);
 		if (ret < local_nr_pages) {
 			ret = -EFAULT;
 			goto out_unmap;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 10d8a0aa871a..dcf37cada369 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -271,7 +271,7 @@ static void bdev_destroy_inode(struct inode *inode)
 	kmem_cache_free(bdev_cachep, bdi);
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct bdev_inode *ei = (struct bdev_inode *) foo;
 	struct block_device *bdev = &ei->bdev;
diff --git a/fs/buffer.c b/fs/buffer.c
index d48caee12e2a..f95805019639 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -706,7 +706,7 @@ static int __set_page_dirty(struct page *page,
 	if (TestSetPageDirty(page))
 		return 0;
 
-	write_lock_irq(&mapping->tree_lock);
+	spin_lock_irq(&mapping->tree_lock);
 	if (page->mapping) {	/* Race with truncate? */
 		WARN_ON_ONCE(warn && !PageUptodate(page));
 
@@ -719,7 +719,7 @@ static int __set_page_dirty(struct page *page,
 		radix_tree_tag_set(&mapping->page_tree,
 				page_index(page), PAGECACHE_TAG_DIRTY);
 	}
-	write_unlock_irq(&mapping->tree_lock);
+	spin_unlock_irq(&mapping->tree_lock);
 	__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
 
 	return 1;
@@ -1214,8 +1214,7 @@ void __brelse(struct buffer_head * buf)
 		put_bh(buf);
 		return;
 	}
-	printk(KERN_ERR "VFS: brelse: Trying to free free buffer\n");
-	WARN_ON(1);
+	WARN(1, KERN_ERR "VFS: brelse: Trying to free free buffer\n");
 }
 
 /*
@@ -3272,7 +3271,7 @@ int bh_submit_read(struct buffer_head *bh)
 EXPORT_SYMBOL(bh_submit_read);
 
 static void
-init_buffer_head(struct kmem_cache *cachep, void *data)
+init_buffer_head(void *data)
 {
 	struct buffer_head *bh = data;
 
diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c
index f58e41d3ba48..6bb440b257b0 100644
--- a/fs/cifs/asn1.c
+++ b/fs/cifs/asn1.c
@@ -400,7 +400,7 @@ asn1_oid_decode(struct asn1_ctx *ctx,
 	size = eoc - ctx->pointer + 1;
 
 	/* first subid actually encodes first two subids */
-	if (size < 2 || size > ULONG_MAX/sizeof(unsigned long))
+	if (size < 2 || size > UINT_MAX/sizeof(unsigned long))
 		return 0;
 
 	*oid = kmalloc(size * sizeof(unsigned long), GFP_ATOMIC);
@@ -494,7 +494,7 @@ decode_negTokenInit(unsigned char *security_blob, int length,
 		/*      remember to free obj->oid */
 		rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag);
 		if (rc) {
-			if ((tag == ASN1_OJI) && (cls == ASN1_PRI)) {
+			if ((tag == ASN1_OJI) && (con == ASN1_PRI)) {
 				rc = asn1_oid_decode(&ctx, end, &oid, &oidlen);
 				if (rc) {
 					rc = compare_oid(oid, oidlen,
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index cc950f69e51e..688a2d42153f 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -107,9 +107,7 @@ void cifs_dump_mids(struct TCP_Server_Info *server)
 #endif /* CONFIG_CIFS_DEBUG2 */
 
 #ifdef CONFIG_PROC_FS
-static int
-cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
-		     int count, int *eof, void *data)
+static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 {
 	struct list_head *tmp;
 	struct list_head *tmp1;
@@ -117,23 +115,13 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 	struct cifsSesInfo *ses;
 	struct cifsTconInfo *tcon;
 	int i;
-	int length = 0;
-	char *original_buf = buf;
 
-	*beginBuffer = buf + offset;
-
-	length =
-	    sprintf(buf,
+	seq_puts(m,
 		    "Display Internal CIFS Data Structures for Debugging\n"
 		    "---------------------------------------------------\n");
-	buf += length;
-	length = sprintf(buf, "CIFS Version %s\n", CIFS_VERSION);
-	buf += length;
-	length = sprintf(buf,
-		"Active VFS Requests: %d\n", GlobalTotalActiveXid);
-	buf += length;
-	length = sprintf(buf, "Servers:");
-	buf += length;
+	seq_printf(m, "CIFS Version %s\n", CIFS_VERSION);
+	seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid);
+	seq_printf(m, "Servers:");
 
 	i = 0;
 	read_lock(&GlobalSMBSeslock);
@@ -142,11 +130,10 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 		if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) ||
 		   (ses->serverNOS == NULL)) {
-			buf += sprintf(buf, "\nentry for %s not fully "
+			seq_printf(m, "\nentry for %s not fully "
 					"displayed\n\t", ses->serverName);
 		} else {
-			length =
-			    sprintf(buf,
+			seq_printf(m,
 				    "\n%d) Name: %s  Domain: %s Mounts: %d OS:"
 				    " %s  \n\tNOS: %s\tCapability: 0x%x\n\tSMB"
 				    " session status: %d\t",
@@ -154,10 +141,9 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 				atomic_read(&ses->inUse),
 				ses->serverOS, ses->serverNOS,
 				ses->capabilities, ses->status);
-			buf += length;
 		}
 		if (ses->server) {
-			buf += sprintf(buf, "TCP status: %d\n\tLocal Users To "
+			seq_printf(m, "TCP status: %d\n\tLocal Users To "
 				    "Server: %d SecMode: 0x%x Req On Wire: %d",
 				ses->server->tcpStatus,
 				atomic_read(&ses->server->socketUseCount),
@@ -165,13 +151,12 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 				atomic_read(&ses->server->inFlight));
 
 #ifdef CONFIG_CIFS_STATS2
-			buf += sprintf(buf, " In Send: %d In MaxReq Wait: %d",
+			seq_printf(m, " In Send: %d In MaxReq Wait: %d",
 				atomic_read(&ses->server->inSend),
 				atomic_read(&ses->server->num_waiters));
 #endif
 
-			length = sprintf(buf, "\nMIDs:\n");
-			buf += length;
+			seq_puts(m, "\nMIDs:\n");
 
 			spin_lock(&GlobalMid_Lock);
 			list_for_each(tmp1, &ses->server->pending_mid_q) {
@@ -179,7 +164,7 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 					mid_q_entry,
 					qhead);
 				if (mid_entry) {
-					length = sprintf(buf,
+					seq_printf(m,
 							"State: %d com: %d pid:"
 							" %d tsk: %p mid %d\n",
 							mid_entry->midState,
@@ -187,7 +172,6 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 							mid_entry->pid,
 							mid_entry->tsk,
 							mid_entry->mid);
-					buf += length;
 				}
 			}
 			spin_unlock(&GlobalMid_Lock);
@@ -195,11 +179,9 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 
 	}
 	read_unlock(&GlobalSMBSeslock);
-	sprintf(buf, "\n");
-	buf++;
+	seq_putc(m, '\n');
 
-	length = sprintf(buf, "Shares:");
-	buf += length;
+	seq_puts(m, "Shares:");
 
 	i = 0;
 	read_lock(&GlobalSMBSeslock);
@@ -208,62 +190,52 @@ cifs_debug_data_read(char *buf, char **beginBuffer, off_t offset,
 		i++;
 		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 		dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
-		length = sprintf(buf, "\n%d) %s Uses: %d ", i,
+		seq_printf(m, "\n%d) %s Uses: %d ", i,
 				 tcon->treeName, atomic_read(&tcon->useCount));
-		buf += length;
 		if (tcon->nativeFileSystem) {
-			length = sprintf(buf, "Type: %s ",
+			seq_printf(m, "Type: %s ",
 					 tcon->nativeFileSystem);
-			buf += length;
 		}
-		length = sprintf(buf, "DevInfo: 0x%x Attributes: 0x%x"
+		seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
 				 "\nPathComponentMax: %d Status: %d",
 			    le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
 			    le32_to_cpu(tcon->fsAttrInfo.Attributes),
 			    le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
 			    tcon->tidStatus);
-		buf += length;
 		if (dev_type == FILE_DEVICE_DISK)
-			length = sprintf(buf, " type: DISK ");
+			seq_puts(m, " type: DISK ");
 		else if (dev_type == FILE_DEVICE_CD_ROM)
-			length = sprintf(buf, " type: CDROM ");
+			seq_puts(m, " type: CDROM ");
 		else
-			length =
-			    sprintf(buf, " type: %d ", dev_type);
-		buf += length;
-		if (tcon->tidStatus == CifsNeedReconnect) {
-			buf += sprintf(buf, "\tDISCONNECTED ");
-			length += 14;
-		}
+			seq_printf(m, " type: %d ", dev_type);
+
+		if (tcon->tidStatus == CifsNeedReconnect)
+			seq_puts(m, "\tDISCONNECTED ");
 	}
 	read_unlock(&GlobalSMBSeslock);
 
-	length = sprintf(buf, "\n");
-	buf += length;
+	seq_putc(m, '\n');
 
 	/* BB add code to dump additional info such as TCP session info now */
-	/* Now calculate total size of returned data */
-	length = buf - original_buf;
-
-	if (offset + count >= length)
-		*eof = 1;
-	if (length < offset) {
-		*eof = 1;
-		return 0;
-	} else {
-		length = length - offset;
-	}
-	if (length > count)
-		length = count;
+	return 0;
+}
 
-	return length;
+static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_debug_data_proc_show, NULL);
 }
 
-#ifdef CONFIG_CIFS_STATS
+static const struct file_operations cifs_debug_data_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifs_debug_data_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
 
-static int
-cifs_stats_write(struct file *file, const char __user *buffer,
-		 unsigned long count, void *data)
+#ifdef CONFIG_CIFS_STATS
+static ssize_t cifs_stats_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
 {
 	char c;
 	int rc;
@@ -307,236 +279,132 @@ cifs_stats_write(struct file *file, const char __user *buffer,
 	return count;
 }
 
-static int
-cifs_stats_read(char *buf, char **beginBuffer, off_t offset,
-		  int count, int *eof, void *data)
+static int cifs_stats_proc_show(struct seq_file *m, void *v)
 {
-	int item_length, i, length;
+	int i;
 	struct list_head *tmp;
 	struct cifsTconInfo *tcon;
 
-	*beginBuffer = buf + offset;
-
-	length = sprintf(buf,
+	seq_printf(m,
 			"Resources in use\nCIFS Session: %d\n",
 			sesInfoAllocCount.counter);
-	buf += length;
-	item_length =
-		sprintf(buf, "Share (unique mount targets): %d\n",
+	seq_printf(m, "Share (unique mount targets): %d\n",
 			tconInfoAllocCount.counter);
-	length += item_length;
-	buf += item_length;
-	item_length =
-		sprintf(buf, "SMB Request/Response Buffer: %d Pool size: %d\n",
+	seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n",
 			bufAllocCount.counter,
 			cifs_min_rcv + tcpSesAllocCount.counter);
-	length += item_length;
-	buf += item_length;
-	item_length =
-		sprintf(buf, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
+	seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n",
 			smBufAllocCount.counter, cifs_min_small);
-	length += item_length;
-	buf += item_length;
 #ifdef CONFIG_CIFS_STATS2
-	item_length = sprintf(buf, "Total Large %d Small %d Allocations\n",
+	seq_printf(m, "Total Large %d Small %d Allocations\n",
 				atomic_read(&totBufAllocCount),
 				atomic_read(&totSmBufAllocCount));
-	length += item_length;
-	buf += item_length;
 #endif /* CONFIG_CIFS_STATS2 */
 
-	item_length =
-		sprintf(buf, "Operations (MIDs): %d\n",
-			midCount.counter);
-	length += item_length;
-	buf += item_length;
-	item_length = sprintf(buf,
+	seq_printf(m, "Operations (MIDs): %d\n", midCount.counter);
+	seq_printf(m,
 		"\n%d session %d share reconnects\n",
 		tcpSesReconnectCount.counter, tconInfoReconnectCount.counter);
-	length += item_length;
-	buf += item_length;
 
-	item_length = sprintf(buf,
+	seq_printf(m,
 		"Total vfs operations: %d maximum at one time: %d\n",
 		GlobalCurrentXid, GlobalMaxActiveXid);
-	length += item_length;
-	buf += item_length;
 
 	i = 0;
 	read_lock(&GlobalSMBSeslock);
 	list_for_each(tmp, &GlobalTreeConnectionList) {
 		i++;
 		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
-		item_length = sprintf(buf, "\n%d) %s", i, tcon->treeName);
-		buf += item_length;
-		length += item_length;
-		if (tcon->tidStatus == CifsNeedReconnect) {
-			buf += sprintf(buf, "\tDISCONNECTED ");
-			length += 14;
-		}
-		item_length = sprintf(buf, "\nSMBs: %d Oplock Breaks: %d",
+		seq_printf(m, "\n%d) %s", i, tcon->treeName);
+		if (tcon->tidStatus == CifsNeedReconnect)
+			seq_puts(m, "\tDISCONNECTED ");
+		seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
 			atomic_read(&tcon->num_smbs_sent),
 			atomic_read(&tcon->num_oplock_brks));
-		buf += item_length;
-		length += item_length;
-		item_length = sprintf(buf, "\nReads:  %d Bytes: %lld",
+		seq_printf(m, "\nReads:  %d Bytes: %lld",
 			atomic_read(&tcon->num_reads),
 			(long long)(tcon->bytes_read));
-		buf += item_length;
-		length += item_length;
-		item_length = sprintf(buf, "\nWrites: %d Bytes: %lld",
+		seq_printf(m, "\nWrites: %d Bytes: %lld",
 			atomic_read(&tcon->num_writes),
 			(long long)(tcon->bytes_written));
-		buf += item_length;
-		length += item_length;
-		item_length = sprintf(buf,
+		seq_printf(m,
 			"\nLocks: %d HardLinks: %d Symlinks: %d",
 			atomic_read(&tcon->num_locks),
 			atomic_read(&tcon->num_hardlinks),
 			atomic_read(&tcon->num_symlinks));
-		buf += item_length;
-		length += item_length;
 
-		item_length = sprintf(buf, "\nOpens: %d Closes: %d Deletes: %d",
+		seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
 			atomic_read(&tcon->num_opens),
 			atomic_read(&tcon->num_closes),
 			atomic_read(&tcon->num_deletes));
-		buf += item_length;
-		length += item_length;
-		item_length = sprintf(buf, "\nMkdirs: %d Rmdirs: %d",
+		seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
 			atomic_read(&tcon->num_mkdirs),
 			atomic_read(&tcon->num_rmdirs));
-		buf += item_length;
-		length += item_length;
-		item_length = sprintf(buf, "\nRenames: %d T2 Renames %d",
+		seq_printf(m, "\nRenames: %d T2 Renames %d",
 			atomic_read(&tcon->num_renames),
 			atomic_read(&tcon->num_t2renames));
-		buf += item_length;
-		length += item_length;
-		item_length = sprintf(buf, "\nFindFirst: %d FNext %d FClose %d",
+		seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
 			atomic_read(&tcon->num_ffirst),
 			atomic_read(&tcon->num_fnext),
 			atomic_read(&tcon->num_fclose));
-		buf += item_length;
-		length += item_length;
 	}
 	read_unlock(&GlobalSMBSeslock);
 
-	buf += sprintf(buf, "\n");
-	length++;
-
-	if (offset + count >= length)
-		*eof = 1;
-	if (length < offset) {
-		*eof = 1;
-		return 0;
-	} else {
-		length = length - offset;
-	}
-	if (length > count)
-		length = count;
+	seq_putc(m, '\n');
+	return 0;
+}
 
-	return length;
+static int cifs_stats_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_stats_proc_show, NULL);
 }
+
+static const struct file_operations cifs_stats_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifs_stats_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= cifs_stats_proc_write,
+};
 #endif /* STATS */
 
 static struct proc_dir_entry *proc_fs_cifs;
-read_proc_t cifs_txanchor_read;
-static read_proc_t cifsFYI_read;
-static write_proc_t cifsFYI_write;
-static read_proc_t oplockEnabled_read;
-static write_proc_t oplockEnabled_write;
-static read_proc_t lookupFlag_read;
-static write_proc_t lookupFlag_write;
-static read_proc_t traceSMB_read;
-static write_proc_t traceSMB_write;
-static read_proc_t multiuser_mount_read;
-static write_proc_t multiuser_mount_write;
-static read_proc_t security_flags_read;
-static write_proc_t security_flags_write;
-/* static read_proc_t ntlmv2_enabled_read;
-static write_proc_t ntlmv2_enabled_write;
-static read_proc_t packet_signing_enabled_read;
-static write_proc_t packet_signing_enabled_write;*/
-static read_proc_t experimEnabled_read;
-static write_proc_t experimEnabled_write;
-static read_proc_t linuxExtensionsEnabled_read;
-static write_proc_t linuxExtensionsEnabled_write;
+static const struct file_operations cifsFYI_proc_fops;
+static const struct file_operations cifs_oplock_proc_fops;
+static const struct file_operations cifs_lookup_cache_proc_fops;
+static const struct file_operations traceSMB_proc_fops;
+static const struct file_operations cifs_multiuser_mount_proc_fops;
+static const struct file_operations cifs_security_flags_proc_fops;
+static const struct file_operations cifs_experimental_proc_fops;
+static const struct file_operations cifs_linux_ext_proc_fops;
 
 void
 cifs_proc_init(void)
 {
-	struct proc_dir_entry *pde;
-
 	proc_fs_cifs = proc_mkdir("fs/cifs", NULL);
 	if (proc_fs_cifs == NULL)
 		return;
 
 	proc_fs_cifs->owner = THIS_MODULE;
-	create_proc_read_entry("DebugData", 0, proc_fs_cifs,
-				cifs_debug_data_read, NULL);
+	proc_create("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
 
 #ifdef CONFIG_CIFS_STATS
-	pde = create_proc_read_entry("Stats", 0, proc_fs_cifs,
-				cifs_stats_read, NULL);
-	if (pde)
-		pde->write_proc = cifs_stats_write;
+	proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
 #endif /* STATS */
-	pde = create_proc_read_entry("cifsFYI", 0, proc_fs_cifs,
-				cifsFYI_read, NULL);
-	if (pde)
-		pde->write_proc = cifsFYI_write;
-
-	pde =
-	    create_proc_read_entry("traceSMB", 0, proc_fs_cifs,
-				traceSMB_read, NULL);
-	if (pde)
-		pde->write_proc = traceSMB_write;
-
-	pde = create_proc_read_entry("OplockEnabled", 0, proc_fs_cifs,
-				oplockEnabled_read, NULL);
-	if (pde)
-		pde->write_proc = oplockEnabled_write;
-
-	pde = create_proc_read_entry("Experimental", 0, proc_fs_cifs,
-				experimEnabled_read, NULL);
-	if (pde)
-		pde->write_proc = experimEnabled_write;
-
-	pde = create_proc_read_entry("LinuxExtensionsEnabled", 0, proc_fs_cifs,
-				linuxExtensionsEnabled_read, NULL);
-	if (pde)
-		pde->write_proc = linuxExtensionsEnabled_write;
-
-	pde =
-	    create_proc_read_entry("MultiuserMount", 0, proc_fs_cifs,
-				multiuser_mount_read, NULL);
-	if (pde)
-		pde->write_proc = multiuser_mount_write;
-
-	pde =
-	    create_proc_read_entry("SecurityFlags", 0, proc_fs_cifs,
-				security_flags_read, NULL);
-	if (pde)
-		pde->write_proc = security_flags_write;
-
-	pde =
-	create_proc_read_entry("LookupCacheEnabled", 0, proc_fs_cifs,
-				lookupFlag_read, NULL);
-	if (pde)
-		pde->write_proc = lookupFlag_write;
-
-/*	pde =
-	    create_proc_read_entry("NTLMV2Enabled", 0, proc_fs_cifs,
-				ntlmv2_enabled_read, NULL);
-	if (pde)
-		pde->write_proc = ntlmv2_enabled_write;
-
-	pde =
-	    create_proc_read_entry("PacketSigningEnabled", 0, proc_fs_cifs,
-				packet_signing_enabled_read, NULL);
-	if (pde)
-		pde->write_proc = packet_signing_enabled_write;*/
+	proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
+	proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
+	proc_create("OplockEnabled", 0, proc_fs_cifs, &cifs_oplock_proc_fops);
+	proc_create("Experimental", 0, proc_fs_cifs,
+		    &cifs_experimental_proc_fops);
+	proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
+		    &cifs_linux_ext_proc_fops);
+	proc_create("MultiuserMount", 0, proc_fs_cifs,
+		    &cifs_multiuser_mount_proc_fops);
+	proc_create("SecurityFlags", 0, proc_fs_cifs,
+		    &cifs_security_flags_proc_fops);
+	proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
+		    &cifs_lookup_cache_proc_fops);
 }
 
 void
@@ -553,39 +421,26 @@ cifs_proc_clean(void)
 #endif
 	remove_proc_entry("MultiuserMount", proc_fs_cifs);
 	remove_proc_entry("OplockEnabled", proc_fs_cifs);
-/*	remove_proc_entry("NTLMV2Enabled",proc_fs_cifs); */
 	remove_proc_entry("SecurityFlags", proc_fs_cifs);
-/*	remove_proc_entry("PacketSigningEnabled", proc_fs_cifs); */
 	remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs);
 	remove_proc_entry("Experimental", proc_fs_cifs);
 	remove_proc_entry("LookupCacheEnabled", proc_fs_cifs);
 	remove_proc_entry("fs/cifs", NULL);
 }
 
-static int
-cifsFYI_read(char *page, char **start, off_t off, int count,
-	     int *eof, void *data)
+static int cifsFYI_proc_show(struct seq_file *m, void *v)
 {
-	int len;
-
-	len = sprintf(page, "%d\n", cifsFYI);
-
-	len -= off;
-	*start = page + off;
-
-	if (len > count)
-		len = count;
-	else
-		*eof = 1;
-
-	if (len < 0)
-		len = 0;
+	seq_printf(m, "%d\n", cifsFYI);
+	return 0;
+}
 
-	return len;
+static int cifsFYI_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifsFYI_proc_show, NULL);
 }
-static int
-cifsFYI_write(struct file *file, const char __user *buffer,
-	      unsigned long count, void *data)
+
+static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
+		size_t count, loff_t *ppos)
 {
 	char c;
 	int rc;
@@ -603,30 +458,28 @@ cifsFYI_write(struct file *file, const char __user *buffer,
 	return count;
 }
 
-static int
-oplockEnabled_read(char *page, char **start, off_t off,
-		   int count, int *eof, void *data)
-{
-	int len;
-
-	len = sprintf(page, "%d\n", oplockEnabled);
-
-	len -= off;
-	*start = page + off;
-
-	if (len > count)
-		len = count;
-	else
-		*eof = 1;
+static const struct file_operations cifsFYI_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifsFYI_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= cifsFYI_proc_write,
+};
 
-	if (len < 0)
-		len = 0;
+static int cifs_oplock_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", oplockEnabled);
+	return 0;
+}
 
-	return len;
+static int cifs_oplock_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_oplock_proc_show, NULL);
 }
-static int
-oplockEnabled_write(struct file *file, const char __user *buffer,
-		    unsigned long count, void *data)
+
+static ssize_t cifs_oplock_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
 {
 	char c;
 	int rc;
@@ -642,30 +495,28 @@ oplockEnabled_write(struct file *file, const char __user *buffer,
 	return count;
 }
 
-static int
-experimEnabled_read(char *page, char **start, off_t off,
-		    int count, int *eof, void *data)
-{
-	int len;
-
-	len = sprintf(page, "%d\n", experimEnabled);
-
-	len -= off;
-	*start = page + off;
+static const struct file_operations cifs_oplock_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifs_oplock_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= cifs_oplock_proc_write,
+};
 
-	if (len > count)
-		len = count;
-	else
-		*eof = 1;
-
-	if (len < 0)
-		len = 0;
+static int cifs_experimental_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", experimEnabled);
+	return 0;
+}
 
-	return len;
+static int cifs_experimental_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_experimental_proc_show, NULL);
 }
-static int
-experimEnabled_write(struct file *file, const char __user *buffer,
-		     unsigned long count, void *data)
+
+static ssize_t cifs_experimental_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
 {
 	char c;
 	int rc;
@@ -683,29 +534,28 @@ experimEnabled_write(struct file *file, const char __user *buffer,
 	return count;
 }
 
-static int
-linuxExtensionsEnabled_read(char *page, char **start, off_t off,
-			    int count, int *eof, void *data)
-{
-	int len;
-
-	len = sprintf(page, "%d\n", linuxExtEnabled);
-	len -= off;
-	*start = page + off;
+static const struct file_operations cifs_experimental_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifs_experimental_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= cifs_experimental_proc_write,
+};
 
-	if (len > count)
-		len = count;
-	else
-		*eof = 1;
-
-	if (len < 0)
-		len = 0;
+static int cifs_linux_ext_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", linuxExtEnabled);
+	return 0;
+}
 
-	return len;
+static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_linux_ext_proc_show, NULL);
 }
-static int
-linuxExtensionsEnabled_write(struct file *file, const char __user *buffer,
-			     unsigned long count, void *data)
+
+static ssize_t cifs_linux_ext_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
 {
 	char c;
 	int rc;
@@ -721,31 +571,28 @@ linuxExtensionsEnabled_write(struct file *file, const char __user *buffer,
 	return count;
 }
 
+static const struct file_operations cifs_linux_ext_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifs_linux_ext_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= cifs_linux_ext_proc_write,
+};
 
-static int
-lookupFlag_read(char *page, char **start, off_t off,
-		int count, int *eof, void *data)
+static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v)
 {
-	int len;
-
-	len = sprintf(page, "%d\n", lookupCacheEnabled);
-
-	len -= off;
-	*start = page + off;
-
-	if (len > count)
-		len = count;
-	else
-		*eof = 1;
-
-	if (len < 0)
-		len = 0;
+	seq_printf(m, "%d\n", lookupCacheEnabled);
+	return 0;
+}
 
-	return len;
+static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_lookup_cache_proc_show, NULL);
 }
-static int
-lookupFlag_write(struct file *file, const char __user *buffer,
-		    unsigned long count, void *data)
+
+static ssize_t cifs_lookup_cache_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
 {
 	char c;
 	int rc;
@@ -760,30 +607,29 @@ lookupFlag_write(struct file *file, const char __user *buffer,
 
 	return count;
 }
-static int
-traceSMB_read(char *page, char **start, off_t off, int count,
-	      int *eof, void *data)
-{
-	int len;
-
-	len = sprintf(page, "%d\n", traceSMB);
-
-	len -= off;
-	*start = page + off;
 
-	if (len > count)
-		len = count;
-	else
-		*eof = 1;
+static const struct file_operations cifs_lookup_cache_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifs_lookup_cache_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= cifs_lookup_cache_proc_write,
+};
 
-	if (len < 0)
-		len = 0;
+static int traceSMB_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", traceSMB);
+	return 0;
+}
 
-	return len;
+static int traceSMB_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, traceSMB_proc_show, NULL);
 }
-static int
-traceSMB_write(struct file *file, const char __user *buffer,
-	       unsigned long count, void *data)
+
+static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
+		size_t count, loff_t *ppos)
 {
 	char c;
 	int rc;
@@ -799,30 +645,28 @@ traceSMB_write(struct file *file, const char __user *buffer,
 	return count;
 }
 
-static int
-multiuser_mount_read(char *page, char **start, off_t off,
-		     int count, int *eof, void *data)
-{
-	int len;
-
-	len = sprintf(page, "%d\n", multiuser_mount);
-
-	len -= off;
-	*start = page + off;
+static const struct file_operations traceSMB_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= traceSMB_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= traceSMB_proc_write,
+};
 
-	if (len > count)
-		len = count;
-	else
-		*eof = 1;
-
-	if (len < 0)
-		len = 0;
+static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%d\n", multiuser_mount);
+	return 0;
+}
 
-	return len;
+static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
+{
+	return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
 }
-static int
-multiuser_mount_write(struct file *file, const char __user *buffer,
-		      unsigned long count, void *data)
+
+static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
 {
 	char c;
 	int rc;
@@ -838,30 +682,28 @@ multiuser_mount_write(struct file *file, const char __user *buffer,
 	return count;
 }
 
-static int
-security_flags_read(char *page, char **start, off_t off,
-		       int count, int *eof, void *data)
-{
-	int len;
-
-	len = sprintf(page, "0x%x\n", extended_security);
-
-	len -= off;
-	*start = page + off;
+static const struct file_operations cifs_multiuser_mount_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifs_multiuser_mount_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= cifs_multiuser_mount_proc_write,
+};
 
-	if (len > count)
-		len = count;
-	else
-		*eof = 1;
-
-	if (len < 0)
-		len = 0;
+static int cifs_security_flags_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "0x%x\n", extended_security);
+	return 0;
+}
 
-	return len;
+static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cifs_security_flags_proc_show, NULL);
 }
-static int
-security_flags_write(struct file *file, const char __user *buffer,
-			unsigned long count, void *data)
+
+static ssize_t cifs_security_flags_proc_write(struct file *file,
+		const char __user *buffer, size_t count, loff_t *ppos)
 {
 	unsigned int flags;
 	char flags_string[12];
@@ -917,6 +759,15 @@ security_flags_write(struct file *file, const char __user *buffer,
 	/* BB should we turn on MAY flags for other MUST options? */
 	return count;
 }
+
+static const struct file_operations cifs_security_flags_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cifs_security_flags_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= cifs_security_flags_proc_write,
+};
 #else
 inline void cifs_proc_init(void)
 {
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 0e9fc2ba90ee..57ecdc83c26f 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -56,7 +56,7 @@ int match_sid(struct cifs_sid *ctsid)
 	struct cifs_sid *cwsid;
 
 	if (!ctsid)
-		return (-1);
+		return -1;
 
 	for (i = 0; i < NUM_WK_SIDS; ++i) {
 		cwsid = &(wksidarr[i].cifssid);
@@ -87,11 +87,11 @@ int match_sid(struct cifs_sid *ctsid)
 		}
 
 		cFYI(1, ("matching sid: %s\n", wksidarr[i].sidname));
-		return (0); /* sids compare/match */
+		return 0; /* sids compare/match */
 	}
 
 	cFYI(1, ("No matching sid"));
-	return (-1);
+	return -1;
 }
 
 /* if the two SIDs (roughly equivalent to a UUID for a user or group) are
@@ -102,16 +102,16 @@ int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
 	int num_subauth, num_sat, num_saw;
 
 	if ((!ctsid) || (!cwsid))
-		return (0);
+		return 0;
 
 	/* compare the revision */
 	if (ctsid->revision != cwsid->revision)
-		return (0);
+		return 0;
 
 	/* compare all of the six auth values */
 	for (i = 0; i < 6; ++i) {
 		if (ctsid->authority[i] != cwsid->authority[i])
-			return (0);
+			return 0;
 	}
 
 	/* compare all of the subauth values if any */
@@ -121,11 +121,11 @@ int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
 	if (num_subauth) {
 		for (i = 0; i < num_subauth; ++i) {
 			if (ctsid->sub_auth[i] != cwsid->sub_auth[i])
-				return (0);
+				return 0;
 		}
 	}
 
-	return (1); /* sids compare/match */
+	return 1; /* sids compare/match */
 }
 
 
@@ -169,8 +169,7 @@ static void copy_sec_desc(const struct cifs_ntsd *pntsd,
 	for (i = 0; i < 6; i++)
 		ngroup_sid_ptr->authority[i] = group_sid_ptr->authority[i];
 	for (i = 0; i < 5; i++)
-		ngroup_sid_ptr->sub_auth[i] =
-				cpu_to_le32(group_sid_ptr->sub_auth[i]);
+		ngroup_sid_ptr->sub_auth[i] = group_sid_ptr->sub_auth[i];
 
 	return;
 }
@@ -285,7 +284,7 @@ static __u16 fill_ace_for_sid(struct cifs_ace *pntace,
 	size = 1 + 1 + 2 + 4 + 1 + 1 + 6 + (psid->num_subauth * 4);
 	pntace->size = cpu_to_le16(size);
 
-	return (size);
+	return size;
 }
 
 
@@ -426,7 +425,7 @@ static int set_chmod_dacl(struct cifs_acl *pndacl, struct cifs_sid *pownersid,
 	pndacl->size = cpu_to_le16(size + sizeof(struct cifs_acl));
 	pndacl->num_aces = cpu_to_le32(3);
 
-	return (0);
+	return 0;
 }
 
 
@@ -510,7 +509,7 @@ static int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len,
 			sizeof(struct cifs_sid)); */
 
 
-	return (0);
+	return 0;
 }
 
 
@@ -527,7 +526,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
 	struct cifs_acl *ndacl_ptr = NULL; /* no need for SACL ptr */
 
 	if ((inode == NULL) || (pntsd == NULL) || (pnntsd == NULL))
-		return (-EIO);
+		return -EIO;
 
 	owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
 				le32_to_cpu(pntsd->osidoffset));
@@ -550,7 +549,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
 	/* copy security descriptor control portion and owner and group sid */
 	copy_sec_desc(pntsd, pnntsd, sidsoffset);
 
-	return (rc);
+	return rc;
 }
 
 
@@ -629,11 +628,11 @@ static int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
 	cFYI(DBG2, ("set ACL for %s from mode 0x%x", path, inode->i_mode));
 
 	if (!inode)
-		return (rc);
+		return rc;
 
 	sb = inode->i_sb;
 	if (sb == NULL)
-		return (rc);
+		return rc;
 
 	cifs_sb = CIFS_SB(sb);
 	xid = GetXid();
@@ -652,7 +651,7 @@ static int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
 		if (rc != 0) {
 			cERROR(1, ("Unable to open file to set ACL"));
 			FreeXid(xid);
-			return (rc);
+			return rc;
 		}
 	}
 
@@ -665,7 +664,7 @@ static int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
 
 	FreeXid(xid);
 
-	return (rc);
+	return rc;
 }
 
 /* Translate the CIFS ACL (simlar to NTFS ACL) for a file into mode bits */
@@ -715,7 +714,7 @@ int mode_to_acl(struct inode *inode, const char *path, __u64 nmode)
 		if (!pnntsd) {
 			cERROR(1, ("Unable to allocate security descriptor"));
 			kfree(pntsd);
-			return (-ENOMEM);
+			return -ENOMEM;
 		}
 
 		rc = build_sec_desc(pntsd, pnntsd, inode, nmode);
@@ -732,6 +731,6 @@ int mode_to_acl(struct inode *inode, const char *path, __u64 nmode)
 		kfree(pntsd);
 	}
 
-	return (rc);
+	return rc;
 }
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 4ff8939c6cc7..83fd40dc1ef0 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -310,9 +310,8 @@ void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key)
 	utf8 and other multibyte codepages each need their own strupper
 	function since a byte at a time will ont work. */
 
-	for (i = 0; i < CIFS_ENCPWD_SIZE; i++) {
+	for (i = 0; i < CIFS_ENCPWD_SIZE; i++)
 		password_with_pad[i] = toupper(password_with_pad[i]);
-	}
 
 	SMBencrypt(password_with_pad, ses->server->cryptKey, lnm_session_key);
 	/* clear password before we return/free memory */
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 22857c639df5..1ec7076f7b24 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -267,7 +267,7 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	return 0;
 }
 
-static int cifs_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int cifs_permission(struct inode *inode, int mask)
 {
 	struct cifs_sb_info *cifs_sb;
 
@@ -766,7 +766,7 @@ const struct file_operations cifs_dir_ops = {
 };
 
 static void
-cifs_init_once(struct kmem_cache *cachep, void *inode)
+cifs_init_once(void *inode)
 {
 	struct cifsInodeInfo *cifsi = inode;
 
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 9cfcf326ead3..7e1cf262effe 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -27,7 +27,7 @@
 #define MAX_SES_INFO 2
 #define MAX_TCON_INFO 4
 
-#define MAX_TREE_SIZE 2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1
+#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
 #define MAX_SERVER_SIZE 15
 #define MAX_SHARE_SIZE  64	/* used to be 20, this should still be enough */
 #define MAX_USERNAME_SIZE 32	/* 32 is to allow for 15 char names + null
@@ -537,8 +537,8 @@ require use of the stronger protocol */
 #endif /* WEAK_PW_HASH */
 #define   CIFSSEC_MUST_SEAL	0x40040 /* not supported yet */
 
-#define   CIFSSEC_DEF  CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2
-#define   CIFSSEC_MAX  CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2
+#define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
+#define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5)
 /*
  *****************************************************************
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 0f327c224da3..409abce12732 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -31,7 +31,7 @@
 #else
 #define CIFS_PROT   0
 #endif
-#define POSIX_PROT  CIFS_PROT+1
+#define POSIX_PROT  (CIFS_PROT+1)
 #define BAD_PROT 0xFFFF
 
 /* SMB command codes */
@@ -341,7 +341,7 @@
 #define CREATE_COMPLETE_IF_OPLK 0x00000100	/* should be zero */
 #define CREATE_NO_EA_KNOWLEDGE  0x00000200
 #define CREATE_EIGHT_DOT_THREE  0x00000400	/* doc says this is obsolete
-						 "open for recovery" flag - should
+						 "open for recovery" flag should
 						 be zero in any case */
 #define CREATE_OPEN_FOR_RECOVERY 0x00000400
 #define CREATE_RANDOM_ACCESS	0x00000800
@@ -414,8 +414,8 @@ struct smb_hdr {
 	__u8 WordCount;
 } __attribute__((packed));
 /* given a pointer to an smb_hdr retrieve the value of byte count */
-#define BCC(smb_var) ( *(__u16 *)((char *)smb_var + sizeof(struct smb_hdr) + (2 * smb_var->WordCount)))
-#define BCC_LE(smb_var) ( *(__le16 *)((char *)smb_var + sizeof(struct smb_hdr) + (2 * smb_var->WordCount)))
+#define BCC(smb_var) (*(__u16 *)((char *)smb_var + sizeof(struct smb_hdr) + (2 * smb_var->WordCount)))
+#define BCC_LE(smb_var) (*(__le16 *)((char *)smb_var + sizeof(struct smb_hdr) + (2 * smb_var->WordCount)))
 /* given a pointer to an smb_hdr retrieve the pointer to the byte area */
 #define pByteArea(smb_var) ((unsigned char *)smb_var + sizeof(struct smb_hdr) + (2 * smb_var->WordCount) + 2)
 
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 4511b708f0f3..c621ffa2ca90 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -686,11 +686,10 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
 						 SecurityBlob,
 						 count - 16,
 						 &server->secType);
-			if (rc == 1) {
+			if (rc == 1)
 				rc = 0;
-			} else {
+			else
 				rc = -EINVAL;
-			}
 		}
 	} else
 		server->capabilities &= ~CAP_EXTENDED_SECURITY;
@@ -3914,7 +3913,10 @@ parse_DFS_referrals(TRANSACTION2_GET_DFS_REFER_RSP *pSMBr,
 	bool is_unicode;
 	struct dfs_referral_level_3 *ref;
 
-	is_unicode = pSMBr->hdr.Flags2 & SMBFLG2_UNICODE;
+	if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
+		is_unicode = true;
+	else
+		is_unicode = false;
 	*num_of_nodes = le16_to_cpu(pSMBr->NumberOfReferrals);
 
 	if (*num_of_nodes < 1) {
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e8fa46c7cff2..b51d5777cde6 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -455,7 +455,7 @@ incomplete_rcv:
 		/* Note that FC 1001 length is big endian on the wire,
 		but we convert it here so it is always manipulated
 		as host byte order */
-		pdu_length = ntohl(smb_buffer->smb_buf_length);
+		pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
 		smb_buffer->smb_buf_length = pdu_length;
 
 		cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
@@ -1461,6 +1461,39 @@ get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
 	return rc;
 }
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+static struct lock_class_key cifs_key[2];
+static struct lock_class_key cifs_slock_key[2];
+
+static inline void
+cifs_reclassify_socket4(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	BUG_ON(sock_owned_by_user(sk));
+	sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
+		&cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
+}
+
+static inline void
+cifs_reclassify_socket6(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	BUG_ON(sock_owned_by_user(sk));
+	sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
+		&cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
+}
+#else
+static inline void
+cifs_reclassify_socket4(struct socket *sock)
+{
+}
+
+static inline void
+cifs_reclassify_socket6(struct socket *sock)
+{
+}
+#endif
+
 /* See RFC1001 section 14 on representation of Netbios names */
 static void rfc1002mangle(char *target, char *source, unsigned int length)
 {
@@ -1495,6 +1528,7 @@ ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
 		/* BB other socket options to set KEEPALIVE, NODELAY? */
 			cFYI(1, ("Socket created"));
 			(*csocket)->sk->sk_allocation = GFP_NOFS;
+			cifs_reclassify_socket4(*csocket);
 		}
 	}
 
@@ -1627,6 +1661,7 @@ ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
 		/* BB other socket options to set KEEPALIVE, NODELAY? */
 			 cFYI(1, ("ipv6 Socket created"));
 			(*csocket)->sk->sk_allocation = GFP_NOFS;
+			cifs_reclassify_socket6(*csocket);
 		}
 	}
 
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 2e904bd111c8..46e54d39461d 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1413,6 +1413,82 @@ out_busy:
 	return -ETXTBSY;
 }
 
+static int
+cifs_set_file_size(struct inode *inode, struct iattr *attrs,
+		   int xid, char *full_path)
+{
+	int rc;
+	struct cifsFileInfo *open_file;
+	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct cifsTconInfo *pTcon = cifs_sb->tcon;
+
+	/*
+	 * To avoid spurious oplock breaks from server, in the case of
+	 * inodes that we already have open, avoid doing path based
+	 * setting of file size if we can do it by handle.
+	 * This keeps our caching token (oplock) and avoids timeouts
+	 * when the local oplock break takes longer to flush
+	 * writebehind data than the SMB timeout for the SetPathInfo
+	 * request would allow
+	 */
+	open_file = find_writable_file(cifsInode);
+	if (open_file) {
+		__u16 nfid = open_file->netfid;
+		__u32 npid = open_file->pid;
+		rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
+					npid, false);
+		atomic_dec(&open_file->wrtPending);
+		cFYI(1, ("SetFSize for attrs rc = %d", rc));
+		if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
+			unsigned int bytes_written;
+			rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
+					  &bytes_written, NULL, NULL, 1);
+			cFYI(1, ("Wrt seteof rc %d", rc));
+		}
+	} else
+		rc = -EINVAL;
+
+	if (rc != 0) {
+		/* Set file size by pathname rather than by handle
+		   either because no valid, writeable file handle for
+		   it was found or because there was an error setting
+		   it by handle */
+		rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
+				   false, cifs_sb->local_nls,
+				   cifs_sb->mnt_cifs_flags &
+					CIFS_MOUNT_MAP_SPECIAL_CHR);
+		cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
+		if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
+			__u16 netfid;
+			int oplock = 0;
+
+			rc = SMBLegacyOpen(xid, pTcon, full_path,
+				FILE_OPEN, GENERIC_WRITE,
+				CREATE_NOT_DIR, &netfid, &oplock, NULL,
+				cifs_sb->local_nls,
+				cifs_sb->mnt_cifs_flags &
+					CIFS_MOUNT_MAP_SPECIAL_CHR);
+			if (rc == 0) {
+				unsigned int bytes_written;
+				rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
+						  attrs->ia_size,
+						  &bytes_written, NULL,
+						  NULL, 1);
+				cFYI(1, ("wrt seteof rc %d", rc));
+				CIFSSMBClose(xid, pTcon, netfid);
+			}
+		}
+	}
+
+	if (rc == 0) {
+		rc = cifs_vmtruncate(inode, attrs->ia_size);
+		cifs_truncate_page(inode->i_mapping, inode->i_size);
+	}
+
+	return rc;
+}
+
 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 {
 	int xid;
@@ -1420,7 +1496,6 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 	struct cifsTconInfo *pTcon;
 	char *full_path = NULL;
 	int rc = -EACCES;
-	struct cifsFileInfo *open_file = NULL;
 	FILE_BASIC_INFO time_buf;
 	bool set_time = false;
 	bool set_dosattr = false;
@@ -1472,78 +1547,8 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 	}
 
 	if (attrs->ia_valid & ATTR_SIZE) {
-		/* To avoid spurious oplock breaks from server, in the case of
-		   inodes that we already have open, avoid doing path based
-		   setting of file size if we can do it by handle.
-		   This keeps our caching token (oplock) and avoids timeouts
-		   when the local oplock break takes longer to flush
-		   writebehind data than the SMB timeout for the SetPathInfo
-		   request would allow */
-
-		open_file = find_writable_file(cifsInode);
-		if (open_file) {
-			__u16 nfid = open_file->netfid;
-			__u32 npid = open_file->pid;
-			rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
-						nfid, npid, false);
-			atomic_dec(&open_file->wrtPending);
-			cFYI(1, ("SetFSize for attrs rc = %d", rc));
-			if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
-				unsigned int bytes_written;
-				rc = CIFSSMBWrite(xid, pTcon,
-						  nfid, 0, attrs->ia_size,
-						  &bytes_written, NULL, NULL,
-						  1 /* 45 seconds */);
-				cFYI(1, ("Wrt seteof rc %d", rc));
-			}
-		} else
-			rc = -EINVAL;
-
-		if (rc != 0) {
-			/* Set file size by pathname rather than by handle
-			   either because no valid, writeable file handle for
-			   it was found or because there was an error setting
-			   it by handle */
-			rc = CIFSSMBSetEOF(xid, pTcon, full_path,
-					   attrs->ia_size, false,
-					   cifs_sb->local_nls,
-					   cifs_sb->mnt_cifs_flags &
-						CIFS_MOUNT_MAP_SPECIAL_CHR);
-			cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
-			if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
-				__u16 netfid;
-				int oplock = 0;
-
-				rc = SMBLegacyOpen(xid, pTcon, full_path,
-					FILE_OPEN, GENERIC_WRITE,
-					CREATE_NOT_DIR, &netfid, &oplock,
-					NULL, cifs_sb->local_nls,
-					cifs_sb->mnt_cifs_flags &
-						CIFS_MOUNT_MAP_SPECIAL_CHR);
-				if (rc == 0) {
-					unsigned int bytes_written;
-					rc = CIFSSMBWrite(xid, pTcon,
-							netfid, 0,
-							attrs->ia_size,
-							&bytes_written, NULL,
-							NULL, 1 /* 45 sec */);
-					cFYI(1, ("wrt seteof rc %d", rc));
-					CIFSSMBClose(xid, pTcon, netfid);
-				}
-
-			}
-		}
-
-		/* Server is ok setting allocation size implicitly - no need
-		   to call:
-		CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, true,
-			 cifs_sb->local_nls);
-		   */
-
-		if (rc == 0) {
-			rc = cifs_vmtruncate(inode, attrs->ia_size);
-			cifs_truncate_page(inode->i_mapping, inode->i_size);
-		} else
+		rc = cifs_set_file_size(inode, attrs, xid, full_path);
+		if (rc != 0)
 			goto cifs_setattr_exit;
 	}
 
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 83f306954883..5f40ed3473f5 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -690,6 +690,7 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
 			else
 				cifs_buf_release(cifsFile->srch_inf.
 						ntwrk_buf_start);
+			cifsFile->srch_inf.ntwrk_buf_start = NULL;
 		}
 		rc = initiate_cifs_search(xid, file);
 		if (rc) {
diff --git a/fs/coda/coda_linux.c b/fs/coda/coda_linux.c
index e1c854890f94..bf4a3fd3c8e3 100644
--- a/fs/coda/coda_linux.c
+++ b/fs/coda/coda_linux.c
@@ -28,11 +28,9 @@ int coda_fake_statfs;
 char * coda_f2s(struct CodaFid *f)
 {
 	static char s[60];
-#ifdef CONFIG_CODA_FS_OLD_API
- 	sprintf(s, "(%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2]);
-#else
+
  	sprintf(s, "(%08x.%08x.%08x.%08x)", f->opaque[0], f->opaque[1], f->opaque[2], f->opaque[3]);
-#endif
+
 	return s;
 }
 
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 3d2580e00a3e..c5916228243c 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -137,9 +137,11 @@ exit:
 }
 
 
-int coda_permission(struct inode *inode, int mask, struct nameidata *nd)
+int coda_permission(struct inode *inode, int mask)
 {
         int error = 0;
+
+	mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
  
 	if (!mask)
 		return 0; 
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 2f58dfc70083..830f51abb971 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -58,7 +58,7 @@ static void coda_destroy_inode(struct inode *inode)
 	kmem_cache_free(coda_inode_cachep, ITOC(inode));
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct coda_inode_info *ei = (struct coda_inode_info *) foo;
 
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index c21a1f552a63..c51365422aa8 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -24,8 +24,7 @@
 #include <linux/coda_psdev.h>
 
 /* pioctl ops */
-static int coda_ioctl_permission(struct inode *inode, int mask,
-				 struct nameidata *nd);
+static int coda_ioctl_permission(struct inode *inode, int mask);
 static int coda_pioctl(struct inode * inode, struct file * filp, 
                        unsigned int cmd, unsigned long user_data);
 
@@ -42,8 +41,7 @@ const struct file_operations coda_ioctl_operations = {
 };
 
 /* the coda pioctl inode ops */
-static int coda_ioctl_permission(struct inode *inode, int mask,
-				 struct nameidata *nd)
+static int coda_ioctl_permission(struct inode *inode, int mask)
 {
         return 0;
 }
@@ -51,7 +49,7 @@ static int coda_ioctl_permission(struct inode *inode, int mask,
 static int coda_pioctl(struct inode * inode, struct file * filp, 
                        unsigned int cmd, unsigned long user_data)
 {
-	struct nameidata nd;
+	struct path path;
         int error;
 	struct PioctlData data;
         struct inode *target_inode = NULL;
@@ -66,21 +64,21 @@ static int coda_pioctl(struct inode * inode, struct file * filp,
          * Look up the pathname. Note that the pathname is in 
          * user memory, and namei takes care of this
          */
-        if ( data.follow ) {
-                error = user_path_walk(data.path, &nd);
+        if (data.follow) {
+                error = user_path(data.path, &path);
 	} else {
-	        error = user_path_walk_link(data.path, &nd);
+	        error = user_lpath(data.path, &path);
 	}
 		
 	if ( error ) {
 		return error;
         } else {
-		target_inode = nd.path.dentry->d_inode;
+		target_inode = path.dentry->d_inode;
 	}
 	
 	/* return if it is not a Coda inode */
 	if ( target_inode->i_sb != inode->i_sb ) {
-		path_put(&nd.path);
+		path_put(&path);
 	        return  -EINVAL;
 	}
 
@@ -89,7 +87,7 @@ static int coda_pioctl(struct inode * inode, struct file * filp,
 
 	error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
 
-	path_put(&nd.path);
+	path_put(&path);
         return error;
 }
 
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 40c36f7352a6..0d9b80ec689c 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -378,11 +378,7 @@ MODULE_AUTHOR("Jan Harkes, Peter J. Braam");
 MODULE_DESCRIPTION("Coda Distributed File System VFS interface");
 MODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR);
 MODULE_LICENSE("GPL");
-#ifdef CONFIG_CODA_FS_OLD_API
-MODULE_VERSION("5.3.21");
-#else
 MODULE_VERSION("6.6");
-#endif
 
 static int __init init_coda(void)
 {
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index 359e531094dd..ce432bca95d1 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -52,12 +52,8 @@ static void *alloc_upcall(int opcode, int size)
         inp->ih.opcode = opcode;
 	inp->ih.pid = current->pid;
 	inp->ih.pgid = task_pgrp_nr(current);
-#ifdef CONFIG_CODA_FS_OLD_API
-	memset(&inp->ih.cred, 0, sizeof(struct coda_cred));
-	inp->ih.cred.cr_fsuid = current->fsuid;
-#else
 	inp->ih.uid = current->fsuid;
-#endif
+
 	return (void*)inp;
 }
 
@@ -166,20 +162,11 @@ int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
 	union inputArgs *inp;
 	union outputArgs *outp;
 	int insize, outsize, error;
-#ifdef CONFIG_CODA_FS_OLD_API
-	struct coda_cred cred = { 0, };
-	cred.cr_fsuid = uid;
-#endif
 	
 	insize = SIZE(release);
 	UPARG(CODA_CLOSE);
 	
-#ifdef CONFIG_CODA_FS_OLD_API
-	memcpy(&(inp->ih.cred), &cred, sizeof(cred));
-#else
 	inp->ih.uid = uid;
-#endif
-	
         inp->coda_close.VFid = *fid;
         inp->coda_close.flags = flags;
 
diff --git a/fs/compat.c b/fs/compat.c
index ed43e17a5dc6..c9d1472e65c5 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -197,8 +197,8 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
 {
 	
 	if (sizeof ubuf->f_blocks == 4) {
-		if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
-		    0xffffffff00000000ULL)
+		if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+		     kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
 			return -EOVERFLOW;
 		/* f_files and f_ffree may be -1; it's okay
 		 * to stuff that into 32 bits */
@@ -234,18 +234,18 @@ static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *
  * The following statfs calls are copies of code from fs/open.c and
  * should be checked against those from time to time
  */
-asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
+asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (!error) {
 		struct kstatfs tmp;
-		error = vfs_statfs(nd.path.dentry, &tmp);
+		error = vfs_statfs(path.dentry, &tmp);
 		if (!error)
 			error = put_compat_statfs(buf, &tmp);
-		path_put(&nd.path);
+		path_put(&path);
 	}
 	return error;
 }
@@ -271,8 +271,8 @@ out:
 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
 {
 	if (sizeof ubuf->f_blocks == 4) {
-		if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
-		    0xffffffff00000000ULL)
+		if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+		     kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
 			return -EOVERFLOW;
 		/* f_files and f_ffree may be -1; it's okay
 		 * to stuff that into 32 bits */
@@ -299,21 +299,21 @@ static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstat
 	return 0;
 }
 
-asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
+asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
 	if (sz != sizeof(*buf))
 		return -EINVAL;
 
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (!error) {
 		struct kstatfs tmp;
-		error = vfs_statfs(nd.path.dentry, &tmp);
+		error = vfs_statfs(path.dentry, &tmp);
 		if (!error)
 			error = put_compat_statfs64(buf, &tmp);
-		path_put(&nd.path);
+		path_put(&path);
 	}
 	return error;
 }
@@ -2131,9 +2131,9 @@ asmlinkage long compat_sys_epoll_pwait(int epfd,
 
 #ifdef CONFIG_SIGNALFD
 
-asmlinkage long compat_sys_signalfd(int ufd,
-				    const compat_sigset_t __user *sigmask,
-				    compat_size_t sigsetsize)
+asmlinkage long compat_sys_signalfd4(int ufd,
+				     const compat_sigset_t __user *sigmask,
+				     compat_size_t sigsetsize, int flags)
 {
 	compat_sigset_t ss32;
 	sigset_t tmp;
@@ -2148,9 +2148,15 @@ asmlinkage long compat_sys_signalfd(int ufd,
 	if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
 		return -EFAULT;
 
-	return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
+	return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
 }
 
+asmlinkage long compat_sys_signalfd(int ufd,
+				    const compat_sigset_t __user *sigmask,
+				    compat_size_t sigsetsize)
+{
+	return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
+}
 #endif /* CONFIG_SIGNALFD */
 
 #ifdef CONFIG_TIMERFD
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 7b3a03c7c6a9..5235c67e7594 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -25,7 +25,6 @@
 #include <linux/slab.h>
 #include <linux/raid/md.h>
 #include <linux/kd.h>
-#include <linux/dirent.h>
 #include <linux/route.h>
 #include <linux/in6.h>
 #include <linux/ipv6_route.h>
@@ -2297,8 +2296,6 @@ COMPATIBLE_IOCTL(AUTOFS_IOC_PROTOVER)
 COMPATIBLE_IOCTL(AUTOFS_IOC_EXPIRE)
 COMPATIBLE_IOCTL(AUTOFS_IOC_EXPIRE_MULTI)
 COMPATIBLE_IOCTL(AUTOFS_IOC_PROTOSUBVER)
-COMPATIBLE_IOCTL(AUTOFS_IOC_ASKREGHOST)
-COMPATIBLE_IOCTL(AUTOFS_IOC_TOGGLEREGHOST)
 COMPATIBLE_IOCTL(AUTOFS_IOC_ASKUMOUNT)
 /* Raw devices */
 COMPATIBLE_IOCTL(RAW_SETBIND)
diff --git a/fs/dcache.c b/fs/dcache.c
index 6068c25b393c..f2584d22cb45 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -61,7 +61,6 @@ static struct kmem_cache *dentry_cache __read_mostly;
 static unsigned int d_hash_mask __read_mostly;
 static unsigned int d_hash_shift __read_mostly;
 static struct hlist_head *dentry_hashtable __read_mostly;
-static LIST_HEAD(dentry_unused);
 
 /* Statistics gathering. */
 struct dentry_stat_t dentry_stat = {
@@ -96,14 +95,6 @@ static void d_free(struct dentry *dentry)
 		call_rcu(&dentry->d_u.d_rcu, d_callback);
 }
 
-static void dentry_lru_remove(struct dentry *dentry)
-{
-	if (!list_empty(&dentry->d_lru)) {
-		list_del_init(&dentry->d_lru);
-		dentry_stat.nr_unused--;
-	}
-}
-
 /*
  * Release the dentry's inode, using the filesystem
  * d_iput() operation if defined.
@@ -130,6 +121,41 @@ static void dentry_iput(struct dentry * dentry)
 	}
 }
 
+/*
+ * dentry_lru_(add|add_tail|del|del_init) must be called with dcache_lock held.
+ */
+static void dentry_lru_add(struct dentry *dentry)
+{
+	list_add(&dentry->d_lru, &dentry->d_sb->s_dentry_lru);
+	dentry->d_sb->s_nr_dentry_unused++;
+	dentry_stat.nr_unused++;
+}
+
+static void dentry_lru_add_tail(struct dentry *dentry)
+{
+	list_add_tail(&dentry->d_lru, &dentry->d_sb->s_dentry_lru);
+	dentry->d_sb->s_nr_dentry_unused++;
+	dentry_stat.nr_unused++;
+}
+
+static void dentry_lru_del(struct dentry *dentry)
+{
+	if (!list_empty(&dentry->d_lru)) {
+		list_del(&dentry->d_lru);
+		dentry->d_sb->s_nr_dentry_unused--;
+		dentry_stat.nr_unused--;
+	}
+}
+
+static void dentry_lru_del_init(struct dentry *dentry)
+{
+	if (likely(!list_empty(&dentry->d_lru))) {
+		list_del_init(&dentry->d_lru);
+		dentry->d_sb->s_nr_dentry_unused--;
+		dentry_stat.nr_unused--;
+	}
+}
+
 /**
  * d_kill - kill dentry and return parent
  * @dentry: dentry to kill
@@ -212,8 +238,7 @@ repeat:
 		goto kill_it;
   	if (list_empty(&dentry->d_lru)) {
   		dentry->d_flags |= DCACHE_REFERENCED;
-  		list_add(&dentry->d_lru, &dentry_unused);
-  		dentry_stat.nr_unused++;
+		dentry_lru_add(dentry);
   	}
  	spin_unlock(&dentry->d_lock);
 	spin_unlock(&dcache_lock);
@@ -222,7 +247,8 @@ repeat:
 unhash_it:
 	__d_drop(dentry);
 kill_it:
-	dentry_lru_remove(dentry);
+	/* if dentry was on the d_lru list delete it from there */
+	dentry_lru_del(dentry);
 	dentry = d_kill(dentry);
 	if (dentry)
 		goto repeat;
@@ -290,7 +316,7 @@ int d_invalidate(struct dentry * dentry)
 static inline struct dentry * __dget_locked(struct dentry *dentry)
 {
 	atomic_inc(&dentry->d_count);
-	dentry_lru_remove(dentry);
+	dentry_lru_del_init(dentry);
 	return dentry;
 }
 
@@ -406,133 +432,168 @@ static void prune_one_dentry(struct dentry * dentry)
 
 		if (dentry->d_op && dentry->d_op->d_delete)
 			dentry->d_op->d_delete(dentry);
-		dentry_lru_remove(dentry);
+		dentry_lru_del_init(dentry);
 		__d_drop(dentry);
 		dentry = d_kill(dentry);
 		spin_lock(&dcache_lock);
 	}
 }
 
-/**
- * prune_dcache - shrink the dcache
- * @count: number of entries to try and free
- * @sb: if given, ignore dentries for other superblocks
- *         which are being unmounted.
- *
- * Shrink the dcache. This is done when we need
- * more memory, or simply when we need to unmount
- * something (at which point we need to unuse
- * all dentries).
- *
- * This function may fail to free any resources if
- * all the dentries are in use.
+/*
+ * Shrink the dentry LRU on a given superblock.
+ * @sb   : superblock to shrink dentry LRU.
+ * @count: If count is NULL, we prune all dentries on superblock.
+ * @flags: If flags is non-zero, we need to do special processing based on
+ * which flags are set. This means we don't need to maintain multiple
+ * similar copies of this loop.
  */
- 
-static void prune_dcache(int count, struct super_block *sb)
+static void __shrink_dcache_sb(struct super_block *sb, int *count, int flags)
 {
-	spin_lock(&dcache_lock);
-	for (; count ; count--) {
-		struct dentry *dentry;
-		struct list_head *tmp;
-		struct rw_semaphore *s_umount;
-
-		cond_resched_lock(&dcache_lock);
+	LIST_HEAD(referenced);
+	LIST_HEAD(tmp);
+	struct dentry *dentry;
+	int cnt = 0;
 
-		tmp = dentry_unused.prev;
-		if (sb) {
-			/* Try to find a dentry for this sb, but don't try
-			 * too hard, if they aren't near the tail they will
-			 * be moved down again soon
+	BUG_ON(!sb);
+	BUG_ON((flags & DCACHE_REFERENCED) && count == NULL);
+	spin_lock(&dcache_lock);
+	if (count != NULL)
+		/* called from prune_dcache() and shrink_dcache_parent() */
+		cnt = *count;
+restart:
+	if (count == NULL)
+		list_splice_init(&sb->s_dentry_lru, &tmp);
+	else {
+		while (!list_empty(&sb->s_dentry_lru)) {
+			dentry = list_entry(sb->s_dentry_lru.prev,
+					struct dentry, d_lru);
+			BUG_ON(dentry->d_sb != sb);
+
+			spin_lock(&dentry->d_lock);
+			/*
+			 * If we are honouring the DCACHE_REFERENCED flag and
+			 * the dentry has this flag set, don't free it. Clear
+			 * the flag and put it back on the LRU.
 			 */
-			int skip = count;
-			while (skip && tmp != &dentry_unused &&
-			    list_entry(tmp, struct dentry, d_lru)->d_sb != sb) {
-				skip--;
-				tmp = tmp->prev;
+			if ((flags & DCACHE_REFERENCED)
+				&& (dentry->d_flags & DCACHE_REFERENCED)) {
+				dentry->d_flags &= ~DCACHE_REFERENCED;
+				list_move_tail(&dentry->d_lru, &referenced);
+				spin_unlock(&dentry->d_lock);
+			} else {
+				list_move_tail(&dentry->d_lru, &tmp);
+				spin_unlock(&dentry->d_lock);
+				cnt--;
+				if (!cnt)
+					break;
 			}
+			cond_resched_lock(&dcache_lock);
 		}
-		if (tmp == &dentry_unused)
-			break;
-		list_del_init(tmp);
-		prefetch(dentry_unused.prev);
- 		dentry_stat.nr_unused--;
-		dentry = list_entry(tmp, struct dentry, d_lru);
-
- 		spin_lock(&dentry->d_lock);
+	}
+	while (!list_empty(&tmp)) {
+		dentry = list_entry(tmp.prev, struct dentry, d_lru);
+		dentry_lru_del_init(dentry);
+		spin_lock(&dentry->d_lock);
 		/*
 		 * We found an inuse dentry which was not removed from
-		 * dentry_unused because of laziness during lookup.  Do not free
-		 * it - just keep it off the dentry_unused list.
+		 * the LRU because of laziness during lookup.  Do not free
+		 * it - just keep it off the LRU list.
 		 */
- 		if (atomic_read(&dentry->d_count)) {
- 			spin_unlock(&dentry->d_lock);
+		if (atomic_read(&dentry->d_count)) {
+			spin_unlock(&dentry->d_lock);
 			continue;
 		}
-		/* If the dentry was recently referenced, don't free it. */
-		if (dentry->d_flags & DCACHE_REFERENCED) {
-			dentry->d_flags &= ~DCACHE_REFERENCED;
- 			list_add(&dentry->d_lru, &dentry_unused);
- 			dentry_stat.nr_unused++;
- 			spin_unlock(&dentry->d_lock);
+		prune_one_dentry(dentry);
+		/* dentry->d_lock was dropped in prune_one_dentry() */
+		cond_resched_lock(&dcache_lock);
+	}
+	if (count == NULL && !list_empty(&sb->s_dentry_lru))
+		goto restart;
+	if (count != NULL)
+		*count = cnt;
+	if (!list_empty(&referenced))
+		list_splice(&referenced, &sb->s_dentry_lru);
+	spin_unlock(&dcache_lock);
+}
+
+/**
+ * prune_dcache - shrink the dcache
+ * @count: number of entries to try to free
+ *
+ * Shrink the dcache. This is done when we need more memory, or simply when we
+ * need to unmount something (at which point we need to unuse all dentries).
+ *
+ * This function may fail to free any resources if all the dentries are in use.
+ */
+static void prune_dcache(int count)
+{
+	struct super_block *sb;
+	int w_count;
+	int unused = dentry_stat.nr_unused;
+	int prune_ratio;
+	int pruned;
+
+	if (unused == 0 || count == 0)
+		return;
+	spin_lock(&dcache_lock);
+restart:
+	if (count >= unused)
+		prune_ratio = 1;
+	else
+		prune_ratio = unused / count;
+	spin_lock(&sb_lock);
+	list_for_each_entry(sb, &super_blocks, s_list) {
+		if (sb->s_nr_dentry_unused == 0)
 			continue;
-		}
-		/*
-		 * If the dentry is not DCACHED_REFERENCED, it is time
-		 * to remove it from the dcache, provided the super block is
-		 * NULL (which means we are trying to reclaim memory)
-		 * or this dentry belongs to the same super block that
-		 * we want to shrink.
-		 */
-		/*
-		 * If this dentry is for "my" filesystem, then I can prune it
-		 * without taking the s_umount lock (I already hold it).
+		sb->s_count++;
+		/* Now, we reclaim unused dentrins with fairness.
+		 * We reclaim them same percentage from each superblock.
+		 * We calculate number of dentries to scan on this sb
+		 * as follows, but the implementation is arranged to avoid
+		 * overflows:
+		 * number of dentries to scan on this sb =
+		 * count * (number of dentries on this sb /
+		 * number of dentries in the machine)
 		 */
-		if (sb && dentry->d_sb == sb) {
-			prune_one_dentry(dentry);
-			continue;
-		}
+		spin_unlock(&sb_lock);
+		if (prune_ratio != 1)
+			w_count = (sb->s_nr_dentry_unused / prune_ratio) + 1;
+		else
+			w_count = sb->s_nr_dentry_unused;
+		pruned = w_count;
 		/*
-		 * ...otherwise we need to be sure this filesystem isn't being
-		 * unmounted, otherwise we could race with
-		 * generic_shutdown_super(), and end up holding a reference to
-		 * an inode while the filesystem is unmounted.
-		 * So we try to get s_umount, and make sure s_root isn't NULL.
-		 * (Take a local copy of s_umount to avoid a use-after-free of
-		 * `dentry').
+		 * We need to be sure this filesystem isn't being unmounted,
+		 * otherwise we could race with generic_shutdown_super(), and
+		 * end up holding a reference to an inode while the filesystem
+		 * is unmounted.  So we try to get s_umount, and make sure
+		 * s_root isn't NULL.
 		 */
-		s_umount = &dentry->d_sb->s_umount;
-		if (down_read_trylock(s_umount)) {
-			if (dentry->d_sb->s_root != NULL) {
-				prune_one_dentry(dentry);
-				up_read(s_umount);
-				continue;
+		if (down_read_trylock(&sb->s_umount)) {
+			if ((sb->s_root != NULL) &&
+			    (!list_empty(&sb->s_dentry_lru))) {
+				spin_unlock(&dcache_lock);
+				__shrink_dcache_sb(sb, &w_count,
+						DCACHE_REFERENCED);
+				pruned -= w_count;
+				spin_lock(&dcache_lock);
 			}
-			up_read(s_umount);
+			up_read(&sb->s_umount);
 		}
-		spin_unlock(&dentry->d_lock);
+		spin_lock(&sb_lock);
+		count -= pruned;
 		/*
-		 * Insert dentry at the head of the list as inserting at the
-		 * tail leads to a cycle.
+		 * restart only when sb is no longer on the list and
+		 * we have more work to do.
 		 */
- 		list_add(&dentry->d_lru, &dentry_unused);
-		dentry_stat.nr_unused++;
+		if (__put_super_and_need_restart(sb) && count > 0) {
+			spin_unlock(&sb_lock);
+			goto restart;
+		}
 	}
+	spin_unlock(&sb_lock);
 	spin_unlock(&dcache_lock);
 }
 
-/*
- * Shrink the dcache for the specified super block.
- * This allows us to unmount a device without disturbing
- * the dcache for the other devices.
- *
- * This implementation makes just two traversals of the
- * unused list.  On the first pass we move the selected
- * dentries to the most recent end, and on the second
- * pass we free them.  The second pass must restart after
- * each dput(), but since the target dentries are all at
- * the end, it's really just a single traversal.
- */
-
 /**
  * shrink_dcache_sb - shrink dcache for a superblock
  * @sb: superblock
@@ -541,44 +602,9 @@ static void prune_dcache(int count, struct super_block *sb)
  * is used to free the dcache before unmounting a file
  * system
  */
-
 void shrink_dcache_sb(struct super_block * sb)
 {
-	struct list_head *tmp, *next;
-	struct dentry *dentry;
-
-	/*
-	 * Pass one ... move the dentries for the specified
-	 * superblock to the most recent end of the unused list.
-	 */
-	spin_lock(&dcache_lock);
-	list_for_each_prev_safe(tmp, next, &dentry_unused) {
-		dentry = list_entry(tmp, struct dentry, d_lru);
-		if (dentry->d_sb != sb)
-			continue;
-		list_move_tail(tmp, &dentry_unused);
-	}
-
-	/*
-	 * Pass two ... free the dentries for this superblock.
-	 */
-repeat:
-	list_for_each_prev_safe(tmp, next, &dentry_unused) {
-		dentry = list_entry(tmp, struct dentry, d_lru);
-		if (dentry->d_sb != sb)
-			continue;
-		dentry_stat.nr_unused--;
-		list_del_init(tmp);
-		spin_lock(&dentry->d_lock);
-		if (atomic_read(&dentry->d_count)) {
-			spin_unlock(&dentry->d_lock);
-			continue;
-		}
-		prune_one_dentry(dentry);
-		cond_resched_lock(&dcache_lock);
-		goto repeat;
-	}
-	spin_unlock(&dcache_lock);
+	__shrink_dcache_sb(sb, NULL, 0);
 }
 
 /*
@@ -595,7 +621,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
 
 	/* detach this root from the system */
 	spin_lock(&dcache_lock);
-	dentry_lru_remove(dentry);
+	dentry_lru_del_init(dentry);
 	__d_drop(dentry);
 	spin_unlock(&dcache_lock);
 
@@ -609,7 +635,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
 			spin_lock(&dcache_lock);
 			list_for_each_entry(loop, &dentry->d_subdirs,
 					    d_u.d_child) {
-				dentry_lru_remove(loop);
+				dentry_lru_del_init(loop);
 				__d_drop(loop);
 				cond_resched_lock(&dcache_lock);
 			}
@@ -791,14 +817,13 @@ resume:
 		struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child);
 		next = tmp->next;
 
-		dentry_lru_remove(dentry);
+		dentry_lru_del_init(dentry);
 		/* 
 		 * move only zero ref count dentries to the end 
 		 * of the unused list for prune_dcache
 		 */
 		if (!atomic_read(&dentry->d_count)) {
-			list_add_tail(&dentry->d_lru, &dentry_unused);
-			dentry_stat.nr_unused++;
+			dentry_lru_add_tail(dentry);
 			found++;
 		}
 
@@ -840,10 +865,11 @@ out:
  
 void shrink_dcache_parent(struct dentry * parent)
 {
+	struct super_block *sb = parent->d_sb;
 	int found;
 
 	while ((found = select_parent(parent)) != 0)
-		prune_dcache(found, parent->d_sb);
+		__shrink_dcache_sb(sb, &found, 0);
 }
 
 /*
@@ -863,7 +889,7 @@ static int shrink_dcache_memory(int nr, gfp_t gfp_mask)
 	if (nr) {
 		if (!(gfp_mask & __GFP_FS))
 			return -1;
-		prune_dcache(nr, NULL);
+		prune_dcache(nr);
 	}
 	return (dentry_stat.nr_unused / 100) * sysctl_vfs_cache_pressure;
 }
@@ -1215,7 +1241,7 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
  * rcu_read_lock() and rcu_read_unlock() are used to disable preemption while
  * lookup is going on.
  *
- * dentry_unused list is not updated even if lookup finds the required dentry
+ * The dentry unused LRU is not updated even if lookup finds the required dentry
  * in there. It is updated in places such as prune_dcache, shrink_dcache_sb,
  * select_parent and __dget_locked. This laziness saves lookup from dcache_lock
  * acquisition.
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 9e81addbd6ea..9606ee848fd8 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -150,17 +150,11 @@ static int dio_refill_pages(struct dio *dio)
 	int nr_pages;
 
 	nr_pages = min(dio->total_pages - dio->curr_page, DIO_PAGES);
-	down_read(&current->mm->mmap_sem);
-	ret = get_user_pages(
-		current,			/* Task for fault acounting */
-		current->mm,			/* whose pages? */
+	ret = get_user_pages_fast(
 		dio->curr_user_address,		/* Where from? */
 		nr_pages,			/* How many pages? */
 		dio->rw == READ,		/* Write to memory? */
-		0,				/* force (?) */
-		&dio->pages[0],
-		NULL);				/* vmas */
-	up_read(&current->mm->mmap_sem);
+		&dio->pages[0]);		/* Put results here */
 
 	if (ret < 0 && dio->blocks_available && (dio->rw & WRITE)) {
 		struct page *page = ZERO_PAGE(0);
diff --git a/fs/dlm/plock.c b/fs/dlm/plock.c
index 78878c5781ca..eba87ff3177b 100644
--- a/fs/dlm/plock.c
+++ b/fs/dlm/plock.c
@@ -116,7 +116,7 @@ int dlm_posix_lock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
 	if (xop->callback == NULL)
 		wait_event(recv_wq, (op->done != 0));
 	else {
-		rv = -EINPROGRESS;
+		rv = FILE_LOCK_DEFERRED;
 		goto out;
 	}
 
diff --git a/fs/dquot.c b/fs/dquot.c
index 5ac77da19959..1346eebe74ce 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -562,6 +562,8 @@ static struct shrinker dqcache_shrinker = {
  */
 static void dqput(struct dquot *dquot)
 {
+	int ret;
+
 	if (!dquot)
 		return;
 #ifdef __DQUOT_PARANOIA
@@ -594,7 +596,19 @@ we_slept:
 	if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags) && dquot_dirty(dquot)) {
 		spin_unlock(&dq_list_lock);
 		/* Commit dquot before releasing */
-		dquot->dq_sb->dq_op->write_dquot(dquot);
+		ret = dquot->dq_sb->dq_op->write_dquot(dquot);
+		if (ret < 0) {
+			printk(KERN_ERR "VFS: cannot write quota structure on "
+				"device %s (error %d). Quota may get out of "
+				"sync!\n", dquot->dq_sb->s_id, ret);
+			/*
+			 * We clear dirty bit anyway, so that we avoid
+			 * infinite loop here
+			 */
+			spin_lock(&dq_list_lock);
+			clear_dquot_dirty(dquot);
+			spin_unlock(&dq_list_lock);
+		}
 		goto we_slept;
 	}
 	/* Clear flag in case dquot was inactive (something bad happened) */
@@ -875,7 +889,10 @@ static void print_warning(struct dquot *dquot, const int warntype)
 	char *msg = NULL;
 	struct tty_struct *tty;
 
-	if (!need_print_warning(dquot))
+	if (warntype == QUOTA_NL_IHARDBELOW ||
+	    warntype == QUOTA_NL_ISOFTBELOW ||
+	    warntype == QUOTA_NL_BHARDBELOW ||
+	    warntype == QUOTA_NL_BSOFTBELOW || !need_print_warning(dquot))
 		return;
 
 	mutex_lock(&tty_mutex);
@@ -1083,6 +1100,35 @@ static int check_bdq(struct dquot *dquot, qsize_t space, int prealloc, char *war
 	return QUOTA_OK;
 }
 
+static int info_idq_free(struct dquot *dquot, ulong inodes)
+{
+	if (test_bit(DQ_FAKE_B, &dquot->dq_flags) ||
+	    dquot->dq_dqb.dqb_curinodes <= dquot->dq_dqb.dqb_isoftlimit)
+		return QUOTA_NL_NOWARN;
+
+	if (dquot->dq_dqb.dqb_curinodes - inodes <= dquot->dq_dqb.dqb_isoftlimit)
+		return QUOTA_NL_ISOFTBELOW;
+	if (dquot->dq_dqb.dqb_curinodes >= dquot->dq_dqb.dqb_ihardlimit &&
+	    dquot->dq_dqb.dqb_curinodes - inodes < dquot->dq_dqb.dqb_ihardlimit)
+		return QUOTA_NL_IHARDBELOW;
+	return QUOTA_NL_NOWARN;
+}
+
+static int info_bdq_free(struct dquot *dquot, qsize_t space)
+{
+	if (test_bit(DQ_FAKE_B, &dquot->dq_flags) ||
+	    toqb(dquot->dq_dqb.dqb_curspace) <= dquot->dq_dqb.dqb_bsoftlimit)
+		return QUOTA_NL_NOWARN;
+
+	if (toqb(dquot->dq_dqb.dqb_curspace - space) <=
+	    dquot->dq_dqb.dqb_bsoftlimit)
+		return QUOTA_NL_BSOFTBELOW;
+	if (toqb(dquot->dq_dqb.dqb_curspace) >= dquot->dq_dqb.dqb_bhardlimit &&
+	    toqb(dquot->dq_dqb.dqb_curspace - space) <
+						dquot->dq_dqb.dqb_bhardlimit)
+		return QUOTA_NL_BHARDBELOW;
+	return QUOTA_NL_NOWARN;
+}
 /*
  *	Initialize quota pointers in inode
  *	Transaction must be started at entry
@@ -1139,6 +1185,28 @@ int dquot_drop(struct inode *inode)
 	return 0;
 }
 
+/* Wrapper to remove references to quota structures from inode */
+void vfs_dq_drop(struct inode *inode)
+{
+	/* Here we can get arbitrary inode from clear_inode() so we have
+	 * to be careful. OTOH we don't need locking as quota operations
+	 * are allowed to change only at mount time */
+	if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op
+	    && inode->i_sb->dq_op->drop) {
+		int cnt;
+		/* Test before calling to rule out calls from proc and such
+                 * where we are not allowed to block. Note that this is
+		 * actually reliable test even without the lock - the caller
+		 * must assure that nobody can come after the DQUOT_DROP and
+		 * add quota pointers back anyway */
+		for (cnt = 0; cnt < MAXQUOTAS; cnt++)
+			if (inode->i_dquot[cnt] != NODQUOT)
+				break;
+		if (cnt < MAXQUOTAS)
+			inode->i_sb->dq_op->drop(inode);
+	}
+}
+
 /*
  * Following four functions update i_blocks+i_bytes fields and
  * quota information (together with appropriate checks)
@@ -1248,6 +1316,7 @@ warn_put_all:
 int dquot_free_space(struct inode *inode, qsize_t number)
 {
 	unsigned int cnt;
+	char warntype[MAXQUOTAS];
 
 	/* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
@@ -1256,6 +1325,7 @@ out_sub:
 		inode_sub_bytes(inode, number);
 		return QUOTA_OK;
 	}
+
 	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	/* Now recheck reliably when holding dqptr_sem */
 	if (IS_NOQUOTA(inode)) {
@@ -1266,6 +1336,7 @@ out_sub:
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (inode->i_dquot[cnt] == NODQUOT)
 			continue;
+		warntype[cnt] = info_bdq_free(inode->i_dquot[cnt], number);
 		dquot_decr_space(inode->i_dquot[cnt], number);
 	}
 	inode_sub_bytes(inode, number);
@@ -1274,6 +1345,7 @@ out_sub:
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		if (inode->i_dquot[cnt])
 			mark_dquot_dirty(inode->i_dquot[cnt]);
+	flush_warnings(inode->i_dquot, warntype);
 	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	return QUOTA_OK;
 }
@@ -1284,11 +1356,13 @@ out_sub:
 int dquot_free_inode(const struct inode *inode, unsigned long number)
 {
 	unsigned int cnt;
+	char warntype[MAXQUOTAS];
 
 	/* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
 	if (IS_NOQUOTA(inode))
 		return QUOTA_OK;
+
 	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	/* Now recheck reliably when holding dqptr_sem */
 	if (IS_NOQUOTA(inode)) {
@@ -1299,6 +1373,7 @@ int dquot_free_inode(const struct inode *inode, unsigned long number)
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (inode->i_dquot[cnt] == NODQUOT)
 			continue;
+		warntype[cnt] = info_idq_free(inode->i_dquot[cnt], number);
 		dquot_decr_inodes(inode->i_dquot[cnt], number);
 	}
 	spin_unlock(&dq_data_lock);
@@ -1306,6 +1381,7 @@ int dquot_free_inode(const struct inode *inode, unsigned long number)
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		if (inode->i_dquot[cnt])
 			mark_dquot_dirty(inode->i_dquot[cnt]);
+	flush_warnings(inode->i_dquot, warntype);
 	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	return QUOTA_OK;
 }
@@ -1323,7 +1399,8 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
 	struct dquot *transfer_to[MAXQUOTAS];
 	int cnt, ret = NO_QUOTA, chuid = (iattr->ia_valid & ATTR_UID) && inode->i_uid != iattr->ia_uid,
 	    chgid = (iattr->ia_valid & ATTR_GID) && inode->i_gid != iattr->ia_gid;
-	char warntype[MAXQUOTAS];
+	char warntype_to[MAXQUOTAS];
+	char warntype_from_inodes[MAXQUOTAS], warntype_from_space[MAXQUOTAS];
 
 	/* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
@@ -1332,7 +1409,7 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
 	/* Clear the arrays */
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		transfer_to[cnt] = transfer_from[cnt] = NODQUOT;
-		warntype[cnt] = QUOTA_NL_NOWARN;
+		warntype_to[cnt] = QUOTA_NL_NOWARN;
 	}
 	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	/* Now recheck reliably when holding dqptr_sem */
@@ -1364,8 +1441,9 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
 		if (transfer_to[cnt] == NODQUOT)
 			continue;
 		transfer_from[cnt] = inode->i_dquot[cnt];
-		if (check_idq(transfer_to[cnt], 1, warntype+cnt) == NO_QUOTA ||
-		    check_bdq(transfer_to[cnt], space, 0, warntype+cnt) == NO_QUOTA)
+		if (check_idq(transfer_to[cnt], 1, warntype_to + cnt) ==
+		    NO_QUOTA || check_bdq(transfer_to[cnt], space, 0,
+		    warntype_to + cnt) == NO_QUOTA)
 			goto warn_put_all;
 	}
 
@@ -1381,6 +1459,10 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
 
 		/* Due to IO error we might not have transfer_from[] structure */
 		if (transfer_from[cnt]) {
+			warntype_from_inodes[cnt] =
+				info_idq_free(transfer_from[cnt], 1);
+			warntype_from_space[cnt] =
+				info_bdq_free(transfer_from[cnt], space);
 			dquot_decr_inodes(transfer_from[cnt], 1);
 			dquot_decr_space(transfer_from[cnt], space);
 		}
@@ -1400,7 +1482,9 @@ warn_put_all:
 		if (transfer_to[cnt])
 			mark_dquot_dirty(transfer_to[cnt]);
 	}
-	flush_warnings(transfer_to, warntype);
+	flush_warnings(transfer_to, warntype_to);
+	flush_warnings(transfer_from, warntype_from_inodes);
+	flush_warnings(transfer_from, warntype_from_space);
 	
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (ret == QUOTA_OK && transfer_from[cnt] != NODQUOT)
@@ -1412,6 +1496,18 @@ warn_put_all:
 	return ret;
 }
 
+/* Wrapper for transferring ownership of an inode */
+int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
+{
+	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
+		vfs_dq_init(inode);
+		if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
+			return 1;
+	}
+	return 0;
+}
+
+
 /*
  * Write info of quota file to disk
  */
@@ -1752,6 +1848,22 @@ out:
 	return error;
 }
 
+/* Wrapper to turn on quotas when remounting rw */
+int vfs_dq_quota_on_remount(struct super_block *sb)
+{
+	int cnt;
+	int ret = 0, err;
+
+	if (!sb->s_qcop || !sb->s_qcop->quota_on)
+		return -ENOSYS;
+	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+		err = sb->s_qcop->quota_on(sb, cnt, 0, NULL, 1);
+		if (err < 0 && !ret)
+			ret = err;
+	}
+	return ret;
+}
+
 /* Generic routine for getting common part of quota structure */
 static void do_get_dqblk(struct dquot *dquot, struct if_dqblk *di)
 {
@@ -2087,8 +2199,11 @@ EXPORT_SYMBOL(dquot_release);
 EXPORT_SYMBOL(dquot_mark_dquot_dirty);
 EXPORT_SYMBOL(dquot_initialize);
 EXPORT_SYMBOL(dquot_drop);
+EXPORT_SYMBOL(vfs_dq_drop);
 EXPORT_SYMBOL(dquot_alloc_space);
 EXPORT_SYMBOL(dquot_alloc_inode);
 EXPORT_SYMBOL(dquot_free_space);
 EXPORT_SYMBOL(dquot_free_inode);
 EXPORT_SYMBOL(dquot_transfer);
+EXPORT_SYMBOL(vfs_dq_transfer);
+EXPORT_SYMBOL(vfs_dq_quota_on_remount);
diff --git a/fs/ecryptfs/Makefile b/fs/ecryptfs/Makefile
index 1e34a7fd4884..b4755a85996e 100644
--- a/fs/ecryptfs/Makefile
+++ b/fs/ecryptfs/Makefile
@@ -4,4 +4,4 @@
 
 obj-$(CONFIG_ECRYPT_FS) += ecryptfs.o
 
-ecryptfs-objs := dentry.o file.o inode.o main.o super.o mmap.o read_write.o crypto.o keystore.o messaging.o netlink.o miscdev.o debug.o
+ecryptfs-objs := dentry.o file.o inode.o main.o super.o mmap.o read_write.o crypto.o keystore.o messaging.o netlink.o miscdev.o kthread.o debug.o
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index e2832bc7869a..7b99917ffadc 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -33,6 +33,7 @@
 #include <linux/crypto.h>
 #include <linux/file.h>
 #include <linux/scatterlist.h>
+#include <asm/unaligned.h>
 #include "ecryptfs_kernel.h"
 
 static int
@@ -1032,10 +1033,8 @@ static int contains_ecryptfs_marker(char *data)
 {
 	u32 m_1, m_2;
 
-	memcpy(&m_1, data, 4);
-	m_1 = be32_to_cpu(m_1);
-	memcpy(&m_2, (data + 4), 4);
-	m_2 = be32_to_cpu(m_2);
+	m_1 = get_unaligned_be32(data);
+	m_2 = get_unaligned_be32(data + 4);
 	if ((m_1 ^ MAGIC_ECRYPTFS_MARKER) == m_2)
 		return 1;
 	ecryptfs_printk(KERN_DEBUG, "m_1 = [0x%.8x]; m_2 = [0x%.8x]; "
@@ -1073,8 +1072,7 @@ static int ecryptfs_process_flags(struct ecryptfs_crypt_stat *crypt_stat,
 	int i;
 	u32 flags;
 
-	memcpy(&flags, page_virt, 4);
-	flags = be32_to_cpu(flags);
+	flags = get_unaligned_be32(page_virt);
 	for (i = 0; i < ((sizeof(ecryptfs_flag_map)
 			  / sizeof(struct ecryptfs_flag_map_elem))); i++)
 		if (flags & ecryptfs_flag_map[i].file_flag) {
@@ -1100,11 +1098,9 @@ static void write_ecryptfs_marker(char *page_virt, size_t *written)
 
 	get_random_bytes(&m_1, (MAGIC_ECRYPTFS_MARKER_SIZE_BYTES / 2));
 	m_2 = (m_1 ^ MAGIC_ECRYPTFS_MARKER);
-	m_1 = cpu_to_be32(m_1);
-	memcpy(page_virt, &m_1, (MAGIC_ECRYPTFS_MARKER_SIZE_BYTES / 2));
-	m_2 = cpu_to_be32(m_2);
-	memcpy(page_virt + (MAGIC_ECRYPTFS_MARKER_SIZE_BYTES / 2), &m_2,
-	       (MAGIC_ECRYPTFS_MARKER_SIZE_BYTES / 2));
+	put_unaligned_be32(m_1, page_virt);
+	page_virt += (MAGIC_ECRYPTFS_MARKER_SIZE_BYTES / 2);
+	put_unaligned_be32(m_2, page_virt);
 	(*written) = MAGIC_ECRYPTFS_MARKER_SIZE_BYTES;
 }
 
@@ -1121,8 +1117,7 @@ write_ecryptfs_flags(char *page_virt, struct ecryptfs_crypt_stat *crypt_stat,
 			flags |= ecryptfs_flag_map[i].file_flag;
 	/* Version is in top 8 bits of the 32-bit flag vector */
 	flags |= ((((u8)crypt_stat->file_version) << 24) & 0xFF000000);
-	flags = cpu_to_be32(flags);
-	memcpy(page_virt, &flags, 4);
+	put_unaligned_be32(flags, page_virt);
 	(*written) = 4;
 }
 
@@ -1238,11 +1233,9 @@ ecryptfs_write_header_metadata(char *virt,
 	num_header_extents_at_front =
 		(u16)(crypt_stat->num_header_bytes_at_front
 		      / crypt_stat->extent_size);
-	header_extent_size = cpu_to_be32(header_extent_size);
-	memcpy(virt, &header_extent_size, 4);
+	put_unaligned_be32(header_extent_size, virt);
 	virt += 4;
-	num_header_extents_at_front = cpu_to_be16(num_header_extents_at_front);
-	memcpy(virt, &num_header_extents_at_front, 2);
+	put_unaligned_be16(num_header_extents_at_front, virt);
 	(*written) = 6;
 }
 
@@ -1410,15 +1403,13 @@ static int parse_header_metadata(struct ecryptfs_crypt_stat *crypt_stat,
 	u32 header_extent_size;
 	u16 num_header_extents_at_front;
 
-	memcpy(&header_extent_size, virt, sizeof(u32));
-	header_extent_size = be32_to_cpu(header_extent_size);
-	virt += sizeof(u32);
-	memcpy(&num_header_extents_at_front, virt, sizeof(u16));
-	num_header_extents_at_front = be16_to_cpu(num_header_extents_at_front);
+	header_extent_size = get_unaligned_be32(virt);
+	virt += sizeof(__be32);
+	num_header_extents_at_front = get_unaligned_be16(virt);
 	crypt_stat->num_header_bytes_at_front =
 		(((size_t)num_header_extents_at_front
 		  * (size_t)header_extent_size));
-	(*bytes_read) = (sizeof(u32) + sizeof(u16));
+	(*bytes_read) = (sizeof(__be32) + sizeof(__be16));
 	if ((validate_header_size == ECRYPTFS_VALIDATE_HEADER_SIZE)
 	    && (crypt_stat->num_header_bytes_at_front
 		< ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE)) {
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index c15c25745e05..b73fb752c5f8 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -559,10 +559,25 @@ extern struct kmem_cache *ecryptfs_key_record_cache;
 extern struct kmem_cache *ecryptfs_key_sig_cache;
 extern struct kmem_cache *ecryptfs_global_auth_tok_cache;
 extern struct kmem_cache *ecryptfs_key_tfm_cache;
+extern struct kmem_cache *ecryptfs_open_req_cache;
 
+struct ecryptfs_open_req {
+#define ECRYPTFS_REQ_PROCESSED 0x00000001
+#define ECRYPTFS_REQ_DROPPED   0x00000002
+#define ECRYPTFS_REQ_ZOMBIE    0x00000004
+	u32 flags;
+	struct file **lower_file;
+	struct dentry *lower_dentry;
+	struct vfsmount *lower_mnt;
+	wait_queue_head_t wait;
+	struct mutex mux;
+	struct list_head kthread_ctl_list;
+};
+
+#define ECRYPTFS_INTERPOSE_FLAG_D_ADD                 0x00000001
 int ecryptfs_interpose(struct dentry *hidden_dentry,
 		       struct dentry *this_dentry, struct super_block *sb,
-		       int flag);
+		       u32 flags);
 int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
 int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat,
 			     const char *name, int length,
@@ -690,5 +705,11 @@ void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
 int
 ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid,
 		      struct user_namespace *user_ns, struct pid *pid);
+int ecryptfs_init_kthread(void);
+void ecryptfs_destroy_kthread(void);
+int ecryptfs_privileged_open(struct file **lower_file,
+			     struct dentry *lower_dentry,
+			     struct vfsmount *lower_mnt);
+int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry);
 
 #endif /* #ifndef ECRYPTFS_KERNEL_H */
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 24749bf0668f..9244d653743e 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -192,6 +192,23 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
 				      | ECRYPTFS_ENCRYPTED);
 	}
 	mutex_unlock(&crypt_stat->cs_mutex);
+	if ((ecryptfs_inode_to_private(inode)->lower_file->f_flags & O_RDONLY)
+	    && !(file->f_flags & O_RDONLY)) {
+		rc = -EPERM;
+		printk(KERN_WARNING "%s: Lower persistent file is RO; eCryptfs "
+		       "file must hence be opened RO\n", __func__);
+		goto out;
+	}
+	if (!ecryptfs_inode_to_private(inode)->lower_file) {
+		rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
+		if (rc) {
+			printk(KERN_ERR "%s: Error attempting to initialize "
+			       "the persistent file for the dentry with name "
+			       "[%s]; rc = [%d]\n", __func__,
+			       ecryptfs_dentry->d_name.name, rc);
+			goto out;
+		}
+	}
 	ecryptfs_set_file_lower(
 		file, ecryptfs_inode_to_private(inode)->lower_file);
 	if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index c92cc1c00aae..89209f00f9c7 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -31,6 +31,7 @@
 #include <linux/mount.h>
 #include <linux/crypto.h>
 #include <linux/fs_stack.h>
+#include <asm/unaligned.h>
 #include "ecryptfs_kernel.h"
 
 static struct dentry *lock_parent(struct dentry *dentry)
@@ -188,6 +189,16 @@ static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry)
 				"context; rc = [%d]\n", rc);
 		goto out;
 	}
+	if (!ecryptfs_inode_to_private(ecryptfs_dentry->d_inode)->lower_file) {
+		rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
+		if (rc) {
+			printk(KERN_ERR "%s: Error attempting to initialize "
+			       "the persistent file for the dentry with name "
+			       "[%s]; rc = [%d]\n", __func__,
+			       ecryptfs_dentry->d_name.name, rc);
+			goto out;
+		}
+	}
 	rc = ecryptfs_write_metadata(ecryptfs_dentry);
 	if (rc) {
 		printk(KERN_ERR "Error writing headers; rc = [%d]\n", rc);
@@ -307,10 +318,11 @@ static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
 		d_add(dentry, NULL);
 		goto out;
 	}
-	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 1);
+	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb,
+				ECRYPTFS_INTERPOSE_FLAG_D_ADD);
 	if (rc) {
 		ecryptfs_printk(KERN_ERR, "Error interposing\n");
-		goto out_dput;
+		goto out;
 	}
 	if (S_ISDIR(lower_inode->i_mode)) {
 		ecryptfs_printk(KERN_DEBUG, "Is a directory; returning\n");
@@ -336,11 +348,21 @@ static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
 		rc = -ENOMEM;
 		ecryptfs_printk(KERN_ERR,
 				"Cannot ecryptfs_kmalloc a page\n");
-		goto out_dput;
+		goto out;
 	}
 	crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
 	if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED))
 		ecryptfs_set_default_sizes(crypt_stat);
+	if (!ecryptfs_inode_to_private(dentry->d_inode)->lower_file) {
+		rc = ecryptfs_init_persistent_file(dentry);
+		if (rc) {
+			printk(KERN_ERR "%s: Error attempting to initialize "
+			       "the persistent file for the dentry with name "
+			       "[%s]; rc = [%d]\n", __func__,
+			       dentry->d_name.name, rc);
+			goto out;
+		}
+	}
 	rc = ecryptfs_read_and_validate_header_region(page_virt,
 						      dentry->d_inode);
 	if (rc) {
@@ -364,8 +386,7 @@ static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
 		else
 			file_size = i_size_read(lower_dentry->d_inode);
 	} else {
-		memcpy(&file_size, page_virt, sizeof(file_size));
-		file_size = be64_to_cpu(file_size);
+		file_size = get_unaligned_be64(page_virt);
 	}
 	i_size_write(dentry->d_inode, (loff_t)file_size);
 	kmem_cache_free(ecryptfs_header_cache_2, page_virt);
@@ -444,7 +465,6 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
 	int rc;
 	struct dentry *lower_dentry;
 	struct dentry *lower_dir_dentry;
-	umode_t mode;
 	char *encoded_symname;
 	int encoded_symlen;
 	struct ecryptfs_crypt_stat *crypt_stat = NULL;
@@ -452,7 +472,6 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
 	dget(lower_dentry);
 	lower_dir_dentry = lock_parent(lower_dentry);
-	mode = S_IALLUGO;
 	encoded_symlen = ecryptfs_encode_filename(crypt_stat, symname,
 						  strlen(symname),
 						  &encoded_symname);
@@ -461,7 +480,7 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
 		goto out_lock;
 	}
 	rc = vfs_symlink(lower_dir_dentry->d_inode, lower_dentry,
-			 encoded_symname, mode);
+			 encoded_symname);
 	kfree(encoded_symname);
 	if (rc || !lower_dentry->d_inode)
 		goto out_lock;
@@ -809,22 +828,9 @@ out:
 }
 
 static int
-ecryptfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+ecryptfs_permission(struct inode *inode, int mask)
 {
-	int rc;
-
-        if (nd) {
-		struct vfsmount *vfsmnt_save = nd->path.mnt;
-		struct dentry *dentry_save = nd->path.dentry;
-
-		nd->path.mnt = ecryptfs_dentry_to_lower_mnt(nd->path.dentry);
-		nd->path.dentry = ecryptfs_dentry_to_lower(nd->path.dentry);
-		rc = permission(ecryptfs_inode_to_lower(inode), mask, nd);
-		nd->path.mnt = vfsmnt_save;
-		nd->path.dentry = dentry_save;
-        } else
-		rc = permission(ecryptfs_inode_to_lower(inode), mask, NULL);
-        return rc;
+	return inode_permission(ecryptfs_inode_to_lower(inode), mask);
 }
 
 /**
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index e82b457180be..f5b76a331b9c 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -44,15 +44,15 @@ static int process_request_key_err(long err_code)
 	int rc = 0;
 
 	switch (err_code) {
-	case ENOKEY:
+	case -ENOKEY:
 		ecryptfs_printk(KERN_WARNING, "No key\n");
 		rc = -ENOENT;
 		break;
-	case EKEYEXPIRED:
+	case -EKEYEXPIRED:
 		ecryptfs_printk(KERN_WARNING, "Key expired\n");
 		rc = -ETIME;
 		break;
-	case EKEYREVOKED:
+	case -EKEYREVOKED:
 		ecryptfs_printk(KERN_WARNING, "Key revoked\n");
 		rc = -EINVAL;
 		break;
@@ -963,8 +963,7 @@ int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
 	if (!(*auth_tok_key) || IS_ERR(*auth_tok_key)) {
 		printk(KERN_ERR "Could not find key with description: [%s]\n",
 		       sig);
-		process_request_key_err(PTR_ERR(*auth_tok_key));
-		rc = -EINVAL;
+		rc = process_request_key_err(PTR_ERR(*auth_tok_key));
 		goto out;
 	}
 	(*auth_tok) = ecryptfs_get_key_payload_data(*auth_tok_key);
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
new file mode 100644
index 000000000000..c440c6b58b2d
--- /dev/null
+++ b/fs/ecryptfs/kthread.c
@@ -0,0 +1,203 @@
+/**
+ * eCryptfs: Linux filesystem encryption layer
+ *
+ * Copyright (C) 2008 International Business Machines Corp.
+ *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/wait.h>
+#include <linux/mount.h>
+#include "ecryptfs_kernel.h"
+
+struct kmem_cache *ecryptfs_open_req_cache;
+
+static struct ecryptfs_kthread_ctl {
+#define ECRYPTFS_KTHREAD_ZOMBIE 0x00000001
+	u32 flags;
+	struct mutex mux;
+	struct list_head req_list;
+	wait_queue_head_t wait;
+} ecryptfs_kthread_ctl;
+
+static struct task_struct *ecryptfs_kthread;
+
+/**
+ * ecryptfs_threadfn
+ * @ignored: ignored
+ *
+ * The eCryptfs kernel thread that has the responsibility of getting
+ * the lower persistent file with RW permissions.
+ *
+ * Returns zero on success; non-zero otherwise
+ */
+static int ecryptfs_threadfn(void *ignored)
+{
+	set_freezable();
+	while (1)  {
+		struct ecryptfs_open_req *req;
+
+		wait_event_freezable(
+			ecryptfs_kthread_ctl.wait,
+			(!list_empty(&ecryptfs_kthread_ctl.req_list)
+			 || kthread_should_stop()));
+		mutex_lock(&ecryptfs_kthread_ctl.mux);
+		if (ecryptfs_kthread_ctl.flags & ECRYPTFS_KTHREAD_ZOMBIE) {
+			mutex_unlock(&ecryptfs_kthread_ctl.mux);
+			goto out;
+		}
+		while (!list_empty(&ecryptfs_kthread_ctl.req_list)) {
+			req = list_first_entry(&ecryptfs_kthread_ctl.req_list,
+					       struct ecryptfs_open_req,
+					       kthread_ctl_list);
+			mutex_lock(&req->mux);
+			list_del(&req->kthread_ctl_list);
+			if (!(req->flags & ECRYPTFS_REQ_ZOMBIE)) {
+				dget(req->lower_dentry);
+				mntget(req->lower_mnt);
+				(*req->lower_file) = dentry_open(
+					req->lower_dentry, req->lower_mnt,
+					(O_RDWR | O_LARGEFILE));
+				req->flags |= ECRYPTFS_REQ_PROCESSED;
+			}
+			wake_up(&req->wait);
+			mutex_unlock(&req->mux);
+		}
+		mutex_unlock(&ecryptfs_kthread_ctl.mux);
+	}
+out:
+	return 0;
+}
+
+int ecryptfs_init_kthread(void)
+{
+	int rc = 0;
+
+	mutex_init(&ecryptfs_kthread_ctl.mux);
+	init_waitqueue_head(&ecryptfs_kthread_ctl.wait);
+	INIT_LIST_HEAD(&ecryptfs_kthread_ctl.req_list);
+	ecryptfs_kthread = kthread_run(&ecryptfs_threadfn, NULL,
+				       "ecryptfs-kthread");
+	if (IS_ERR(ecryptfs_kthread)) {
+		rc = PTR_ERR(ecryptfs_kthread);
+		printk(KERN_ERR "%s: Failed to create kernel thread; rc = [%d]"
+		       "\n", __func__, rc);
+	}
+	return rc;
+}
+
+void ecryptfs_destroy_kthread(void)
+{
+	struct ecryptfs_open_req *req;
+
+	mutex_lock(&ecryptfs_kthread_ctl.mux);
+	ecryptfs_kthread_ctl.flags |= ECRYPTFS_KTHREAD_ZOMBIE;
+	list_for_each_entry(req, &ecryptfs_kthread_ctl.req_list,
+			    kthread_ctl_list) {
+		mutex_lock(&req->mux);
+		req->flags |= ECRYPTFS_REQ_ZOMBIE;
+		wake_up(&req->wait);
+		mutex_unlock(&req->mux);
+	}
+	mutex_unlock(&ecryptfs_kthread_ctl.mux);
+	kthread_stop(ecryptfs_kthread);
+	wake_up(&ecryptfs_kthread_ctl.wait);
+}
+
+/**
+ * ecryptfs_privileged_open
+ * @lower_file: Result of dentry_open by root on lower dentry
+ * @lower_dentry: Lower dentry for file to open
+ * @lower_mnt: Lower vfsmount for file to open
+ *
+ * This function gets a r/w file opened againt the lower dentry.
+ *
+ * Returns zero on success; non-zero otherwise
+ */
+int ecryptfs_privileged_open(struct file **lower_file,
+			     struct dentry *lower_dentry,
+			     struct vfsmount *lower_mnt)
+{
+	struct ecryptfs_open_req *req;
+	int rc = 0;
+
+	/* Corresponding dput() and mntput() are done when the
+	 * persistent file is fput() when the eCryptfs inode is
+	 * destroyed. */
+	dget(lower_dentry);
+	mntget(lower_mnt);
+	(*lower_file) = dentry_open(lower_dentry, lower_mnt,
+				    (O_RDWR | O_LARGEFILE));
+	if (!IS_ERR(*lower_file))
+		goto out;
+	req = kmem_cache_alloc(ecryptfs_open_req_cache, GFP_KERNEL);
+	if (!req) {
+		rc = -ENOMEM;
+		goto out;
+	}
+	mutex_init(&req->mux);
+	req->lower_file = lower_file;
+	req->lower_dentry = lower_dentry;
+	req->lower_mnt = lower_mnt;
+	init_waitqueue_head(&req->wait);
+	req->flags = 0;
+	mutex_lock(&ecryptfs_kthread_ctl.mux);
+	if (ecryptfs_kthread_ctl.flags & ECRYPTFS_KTHREAD_ZOMBIE) {
+		rc = -EIO;
+		mutex_unlock(&ecryptfs_kthread_ctl.mux);
+		printk(KERN_ERR "%s: We are in the middle of shutting down; "
+		       "aborting privileged request to open lower file\n",
+			__func__);
+		goto out_free;
+	}
+	list_add_tail(&req->kthread_ctl_list, &ecryptfs_kthread_ctl.req_list);
+	mutex_unlock(&ecryptfs_kthread_ctl.mux);
+	wake_up(&ecryptfs_kthread_ctl.wait);
+	wait_event(req->wait, (req->flags != 0));
+	mutex_lock(&req->mux);
+	BUG_ON(req->flags == 0);
+	if (req->flags & ECRYPTFS_REQ_DROPPED
+	    || req->flags & ECRYPTFS_REQ_ZOMBIE) {
+		rc = -EIO;
+		printk(KERN_WARNING "%s: Privileged open request dropped\n",
+		       __func__);
+		goto out_unlock;
+	}
+	if (IS_ERR(*req->lower_file)) {
+		rc = PTR_ERR(*req->lower_file);
+		dget(lower_dentry);
+		mntget(lower_mnt);
+		(*lower_file) = dentry_open(lower_dentry, lower_mnt,
+					    (O_RDONLY | O_LARGEFILE));
+		if (IS_ERR(*lower_file)) {
+			rc = PTR_ERR(*req->lower_file);
+			(*lower_file) = NULL;
+			printk(KERN_WARNING "%s: Error attempting privileged "
+			       "open of lower file with either RW or RO "
+			       "perms; rc = [%d]. Giving up.\n",
+			       __func__, rc);
+		}
+	}
+out_unlock:
+	mutex_unlock(&req->mux);
+out_free:
+	kmem_cache_free(ecryptfs_open_req_cache, req);
+out:
+	return rc;
+}
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index d603631601eb..448dfd597b5f 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -117,7 +117,7 @@ void __ecryptfs_printk(const char *fmt, ...)
  *
  * Returns zero on success; non-zero otherwise
  */
-static int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
+int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
 {
 	struct ecryptfs_inode_info *inode_info =
 		ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
@@ -130,26 +130,12 @@ static int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
 			ecryptfs_dentry_to_lower_mnt(ecryptfs_dentry);
 
 		lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
-		/* Corresponding dput() and mntput() are done when the
-		 * persistent file is fput() when the eCryptfs inode
-		 * is destroyed. */
-		dget(lower_dentry);
-		mntget(lower_mnt);
-		inode_info->lower_file = dentry_open(lower_dentry,
-						     lower_mnt,
-						     (O_RDWR | O_LARGEFILE));
-		if (IS_ERR(inode_info->lower_file)) {
-			dget(lower_dentry);
-			mntget(lower_mnt);
-			inode_info->lower_file = dentry_open(lower_dentry,
-							     lower_mnt,
-							     (O_RDONLY
-							      | O_LARGEFILE));
-		}
-		if (IS_ERR(inode_info->lower_file)) {
+		rc = ecryptfs_privileged_open(&inode_info->lower_file,
+						     lower_dentry, lower_mnt);
+		if (rc || IS_ERR(inode_info->lower_file)) {
 			printk(KERN_ERR "Error opening lower persistent file "
-			       "for lower_dentry [0x%p] and lower_mnt [0x%p]\n",
-			       lower_dentry, lower_mnt);
+			       "for lower_dentry [0x%p] and lower_mnt [0x%p]; "
+			       "rc = [%d]\n", lower_dentry, lower_mnt, rc);
 			rc = PTR_ERR(inode_info->lower_file);
 			inode_info->lower_file = NULL;
 		}
@@ -163,14 +149,14 @@ static int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
  * @lower_dentry: Existing dentry in the lower filesystem
  * @dentry: ecryptfs' dentry
  * @sb: ecryptfs's super_block
- * @flag: If set to true, then d_add is called, else d_instantiate is called
+ * @flags: flags to govern behavior of interpose procedure
  *
  * Interposes upper and lower dentries.
  *
  * Returns zero on success; non-zero otherwise
  */
 int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry,
-		       struct super_block *sb, int flag)
+		       struct super_block *sb, u32 flags)
 {
 	struct inode *lower_inode;
 	struct inode *inode;
@@ -207,7 +193,7 @@ int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry,
 		init_special_inode(inode, lower_inode->i_mode,
 				   lower_inode->i_rdev);
 	dentry->d_op = &ecryptfs_dops;
-	if (flag)
+	if (flags & ECRYPTFS_INTERPOSE_FLAG_D_ADD)
 		d_add(dentry, inode);
 	else
 		d_instantiate(dentry, inode);
@@ -215,13 +201,6 @@ int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry,
 	/* This size will be overwritten for real files w/ headers and
 	 * other metadata */
 	fsstack_copy_inode_size(inode, lower_inode);
-	rc = ecryptfs_init_persistent_file(dentry);
-	if (rc) {
-		printk(KERN_ERR "%s: Error attempting to initialize the "
-		       "persistent file for the dentry with name [%s]; "
-		       "rc = [%d]\n", __func__, dentry->d_name.name, rc);
-		goto out;
-	}
 out:
 	return rc;
 }
@@ -262,10 +241,11 @@ static int ecryptfs_init_global_auth_toks(
 			       "session keyring for sig specified in mount "
 			       "option: [%s]\n", global_auth_tok->sig);
 			global_auth_tok->flags |= ECRYPTFS_AUTH_TOK_INVALID;
-			rc = 0;
+			goto out;
 		} else
 			global_auth_tok->flags &= ~ECRYPTFS_AUTH_TOK_INVALID;
 	}
+out:
 	return rc;
 }
 
@@ -314,7 +294,6 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
 	char *cipher_name_dst;
 	char *cipher_name_src;
 	char *cipher_key_bytes_src;
-	int cipher_name_len;
 
 	if (!options) {
 		rc = -EINVAL;
@@ -395,17 +374,12 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
 		goto out;
 	}
 	if (!cipher_name_set) {
-		cipher_name_len = strlen(ECRYPTFS_DEFAULT_CIPHER);
-		if (unlikely(cipher_name_len
-			     >= ECRYPTFS_MAX_CIPHER_NAME_SIZE)) {
-			rc = -EINVAL;
-			BUG();
-			goto out;
-		}
-		memcpy(mount_crypt_stat->global_default_cipher_name,
-		       ECRYPTFS_DEFAULT_CIPHER, cipher_name_len);
-		mount_crypt_stat->global_default_cipher_name[cipher_name_len]
-		    = '\0';
+		int cipher_name_len = strlen(ECRYPTFS_DEFAULT_CIPHER);
+
+		BUG_ON(cipher_name_len >= ECRYPTFS_MAX_CIPHER_NAME_SIZE);
+
+		strcpy(mount_crypt_stat->global_default_cipher_name,
+		       ECRYPTFS_DEFAULT_CIPHER);
 	}
 	if (!cipher_key_bytes_set) {
 		mount_crypt_stat->global_default_cipher_key_size = 0;
@@ -430,7 +404,6 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
 		printk(KERN_WARNING "One or more global auth toks could not "
 		       "properly register; rc = [%d]\n", rc);
 	}
-	rc = 0;
 out:
 	return rc;
 }
@@ -605,7 +578,7 @@ static struct file_system_type ecryptfs_fs_type = {
  * Initializes the ecryptfs_inode_info_cache when it is created
  */
 static void
-inode_info_init_once(struct kmem_cache *cachep, void *vptr)
+inode_info_init_once(void *vptr)
 {
 	struct ecryptfs_inode_info *ei = (struct ecryptfs_inode_info *)vptr;
 
@@ -616,7 +589,7 @@ static struct ecryptfs_cache_info {
 	struct kmem_cache **cache;
 	const char *name;
 	size_t size;
-	void (*ctor)(struct kmem_cache *cache, void *obj);
+	void (*ctor)(void *obj);
 } ecryptfs_cache_infos[] = {
 	{
 		.cache = &ecryptfs_auth_tok_list_item_cache,
@@ -679,6 +652,11 @@ static struct ecryptfs_cache_info {
 		.name = "ecryptfs_key_tfm_cache",
 		.size = sizeof(struct ecryptfs_key_tfm),
 	},
+	{
+		.cache = &ecryptfs_open_req_cache,
+		.name = "ecryptfs_open_req_cache",
+		.size = sizeof(struct ecryptfs_open_req),
+	},
 };
 
 static void ecryptfs_free_kmem_caches(void)
@@ -795,11 +773,17 @@ static int __init ecryptfs_init(void)
 		printk(KERN_ERR "sysfs registration failed\n");
 		goto out_unregister_filesystem;
 	}
+	rc = ecryptfs_init_kthread();
+	if (rc) {
+		printk(KERN_ERR "%s: kthread initialization failed; "
+		       "rc = [%d]\n", __func__, rc);
+		goto out_do_sysfs_unregistration;
+	}
 	rc = ecryptfs_init_messaging(ecryptfs_transport);
 	if (rc) {
-		ecryptfs_printk(KERN_ERR, "Failure occured while attempting to "
+		printk(KERN_ERR "Failure occured while attempting to "
 				"initialize the eCryptfs netlink socket\n");
-		goto out_do_sysfs_unregistration;
+		goto out_destroy_kthread;
 	}
 	rc = ecryptfs_init_crypto();
 	if (rc) {
@@ -814,6 +798,8 @@ static int __init ecryptfs_init(void)
 	goto out;
 out_release_messaging:
 	ecryptfs_release_messaging(ecryptfs_transport);
+out_destroy_kthread:
+	ecryptfs_destroy_kthread();
 out_do_sysfs_unregistration:
 	do_sysfs_unregistration();
 out_unregister_filesystem:
@@ -833,6 +819,7 @@ static void __exit ecryptfs_exit(void)
 		printk(KERN_ERR "Failure whilst attempting to destroy crypto; "
 		       "rc = [%d]\n", rc);
 	ecryptfs_release_messaging(ecryptfs_transport);
+	ecryptfs_destroy_kthread();
 	do_sysfs_unregistration();
 	unregister_filesystem(&ecryptfs_fs_type);
 	ecryptfs_free_kmem_caches();
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index 09a4522f65e6..b484792a0996 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -358,46 +358,6 @@ out_unlock_daemon:
 }
 
 /**
- * ecryptfs_miscdev_helo
- * @euid: effective user id of miscdevess sending helo packet
- * @user_ns: The namespace in which @euid applies
- * @pid: miscdevess id of miscdevess sending helo packet
- *
- * Returns zero on success; non-zero otherwise
- */
-static int ecryptfs_miscdev_helo(uid_t euid, struct user_namespace *user_ns,
-				 struct pid *pid)
-{
-	int rc;
-
-	rc = ecryptfs_process_helo(ECRYPTFS_TRANSPORT_MISCDEV, euid, user_ns,
-				   pid);
-	if (rc)
-		printk(KERN_WARNING "Error processing HELO; rc = [%d]\n", rc);
-	return rc;
-}
-
-/**
- * ecryptfs_miscdev_quit
- * @euid: effective user id of miscdevess sending quit packet
- * @user_ns: The namespace in which @euid applies
- * @pid: miscdevess id of miscdevess sending quit packet
- *
- * Returns zero on success; non-zero otherwise
- */
-static int ecryptfs_miscdev_quit(uid_t euid, struct user_namespace *user_ns,
-				 struct pid *pid)
-{
-	int rc;
-
-	rc = ecryptfs_process_quit(euid, user_ns, pid);
-	if (rc)
-		printk(KERN_WARNING
-		       "Error processing QUIT message; rc = [%d]\n", rc);
-	return rc;
-}
-
-/**
  * ecryptfs_miscdev_response - miscdevess response to message previously sent to daemon
  * @data: Bytes comprising struct ecryptfs_message
  * @data_size: sizeof(struct ecryptfs_message) + data len
@@ -512,26 +472,7 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf,
 			       __func__, rc);
 		break;
 	case ECRYPTFS_MSG_HELO:
-		rc = ecryptfs_miscdev_helo(current->euid,
-					   current->nsproxy->user_ns,
-					   task_pid(current));
-		if (rc) {
-			printk(KERN_ERR "%s: Error attempting to process "
-			       "helo from pid [0x%p]; rc = [%d]\n", __func__,
-			       task_pid(current), rc);
-			goto out_free;
-		}
-		break;
 	case ECRYPTFS_MSG_QUIT:
-		rc = ecryptfs_miscdev_quit(current->euid,
-					   current->nsproxy->user_ns,
-					   task_pid(current));
-		if (rc) {
-			printk(KERN_ERR "%s: Error attempting to process "
-			       "quit from pid [0x%p]; rc = [%d]\n", __func__,
-			       task_pid(current), rc);
-			goto out_free;
-		}
 		break;
 	default:
 		ecryptfs_printk(KERN_WARNING, "Dropping miscdev "
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 2b6fe1e6e8ba..245c2dc02d5c 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -32,6 +32,7 @@
 #include <linux/file.h>
 #include <linux/crypto.h>
 #include <linux/scatterlist.h>
+#include <asm/unaligned.h>
 #include "ecryptfs_kernel.h"
 
 /**
@@ -372,7 +373,6 @@ out:
  */
 static int ecryptfs_write_inode_size_to_header(struct inode *ecryptfs_inode)
 {
-	u64 file_size;
 	char *file_size_virt;
 	int rc;
 
@@ -381,9 +381,7 @@ static int ecryptfs_write_inode_size_to_header(struct inode *ecryptfs_inode)
 		rc = -ENOMEM;
 		goto out;
 	}
-	file_size = (u64)i_size_read(ecryptfs_inode);
-	file_size = cpu_to_be64(file_size);
-	memcpy(file_size_virt, &file_size, sizeof(u64));
+	put_unaligned_be64(i_size_read(ecryptfs_inode), file_size_virt);
 	rc = ecryptfs_write_lower(ecryptfs_inode, file_size_virt, 0,
 				  sizeof(u64));
 	kfree(file_size_virt);
@@ -403,7 +401,6 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
 	struct dentry *lower_dentry =
 		ecryptfs_inode_to_private(ecryptfs_inode)->lower_file->f_dentry;
 	struct inode *lower_inode = lower_dentry->d_inode;
-	u64 file_size;
 	int rc;
 
 	if (!lower_inode->i_op->getxattr || !lower_inode->i_op->setxattr) {
@@ -424,9 +421,7 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *ecryptfs_inode)
 					   xattr_virt, PAGE_CACHE_SIZE);
 	if (size < 0)
 		size = 8;
-	file_size = (u64)i_size_read(ecryptfs_inode);
-	file_size = cpu_to_be64(file_size);
-	memcpy(xattr_virt, &file_size, sizeof(u64));
+	put_unaligned_be64(i_size_read(ecryptfs_inode), xattr_virt);
 	rc = lower_inode->i_op->setxattr(lower_dentry, ECRYPTFS_XATTR_NAME,
 					 xattr_virt, size, 0);
 	mutex_unlock(&lower_inode->i_mutex);
diff --git a/fs/efs/super.c b/fs/efs/super.c
index d733531b55e2..567b134fa1f1 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -70,7 +70,7 @@ static void efs_destroy_inode(struct inode *inode)
 	kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct efs_inode_info *ei = (struct efs_inode_info *) foo;
 
diff --git a/fs/eventfd.c b/fs/eventfd.c
index 343942deeec1..08bf558d0408 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -198,11 +198,18 @@ struct file *eventfd_fget(int fd)
 	return file;
 }
 
-asmlinkage long sys_eventfd(unsigned int count)
+asmlinkage long sys_eventfd2(unsigned int count, int flags)
 {
 	int fd;
 	struct eventfd_ctx *ctx;
 
+	/* Check the EFD_* constants for consistency.  */
+	BUILD_BUG_ON(EFD_CLOEXEC != O_CLOEXEC);
+	BUILD_BUG_ON(EFD_NONBLOCK != O_NONBLOCK);
+
+	if (flags & ~(EFD_CLOEXEC | EFD_NONBLOCK))
+		return -EINVAL;
+
 	ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
 		return -ENOMEM;
@@ -214,9 +221,15 @@ asmlinkage long sys_eventfd(unsigned int count)
 	 * When we call this, the initialization must be complete, since
 	 * anon_inode_getfd() will install the fd.
 	 */
-	fd = anon_inode_getfd("[eventfd]", &eventfd_fops, ctx);
+	fd = anon_inode_getfd("[eventfd]", &eventfd_fops, ctx,
+			      flags & (O_CLOEXEC | O_NONBLOCK));
 	if (fd < 0)
 		kfree(ctx);
 	return fd;
 }
 
+asmlinkage long sys_eventfd(unsigned int count)
+{
+	return sys_eventfd2(count, 0);
+}
+
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 990c01d2d66b..0c87474f7917 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1046,20 +1046,25 @@ retry:
  * RB tree. With the current implementation, the "size" parameter is ignored
  * (besides sanity checks).
  */
-asmlinkage long sys_epoll_create(int size)
+asmlinkage long sys_epoll_create1(int flags)
 {
 	int error, fd = -1;
 	struct eventpoll *ep;
 
+	/* Check the EPOLL_* constant for consistency.  */
+	BUILD_BUG_ON(EPOLL_CLOEXEC != O_CLOEXEC);
+
+	if (flags & ~EPOLL_CLOEXEC)
+		return -EINVAL;
+
 	DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d)\n",
-		     current, size));
+		     current, flags));
 
 	/*
-	 * Sanity check on the size parameter, and create the internal data
-	 * structure ( "struct eventpoll" ).
+	 * Create the internal data structure ( "struct eventpoll" ).
 	 */
-	error = -EINVAL;
-	if (size <= 0 || (error = ep_alloc(&ep)) < 0) {
+	error = ep_alloc(&ep);
+	if (error < 0) {
 		fd = error;
 		goto error_return;
 	}
@@ -1068,17 +1073,26 @@ asmlinkage long sys_epoll_create(int size)
 	 * Creates all the items needed to setup an eventpoll file. That is,
 	 * a file structure and a free file descriptor.
 	 */
-	fd = anon_inode_getfd("[eventpoll]", &eventpoll_fops, ep);
+	fd = anon_inode_getfd("[eventpoll]", &eventpoll_fops, ep,
+			      flags & O_CLOEXEC);
 	if (fd < 0)
 		ep_free(ep);
 
 error_return:
 	DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
-		     current, size, fd));
+		     current, flags, fd));
 
 	return fd;
 }
 
+asmlinkage long sys_epoll_create(int size)
+{
+	if (size < 0)
+		return -EINVAL;
+
+	return sys_epoll_create1(0);
+}
+
 /*
  * The following function implements the controller interface for
  * the eventpoll file that enables the insertion/removal/change of
diff --git a/fs/exec.c b/fs/exec.c
index fd9234379e8d..9696bbf0f0b1 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -25,32 +25,30 @@
 #include <linux/slab.h>
 #include <linux/file.h>
 #include <linux/fdtable.h>
-#include <linux/mman.h>
+#include <linux/mm.h>
 #include <linux/stat.h>
 #include <linux/fcntl.h>
 #include <linux/smp_lock.h>
+#include <linux/swap.h>
 #include <linux/string.h>
 #include <linux/init.h>
-#include <linux/pagemap.h>
 #include <linux/highmem.h>
 #include <linux/spinlock.h>
 #include <linux/key.h>
 #include <linux/personality.h>
 #include <linux/binfmts.h>
-#include <linux/swap.h>
 #include <linux/utsname.h>
 #include <linux/pid_namespace.h>
 #include <linux/module.h>
 #include <linux/namei.h>
 #include <linux/proc_fs.h>
-#include <linux/ptrace.h>
 #include <linux/mount.h>
 #include <linux/security.h>
 #include <linux/syscalls.h>
-#include <linux/rmap.h>
 #include <linux/tsacct_kern.h>
 #include <linux/cn_proc.h>
 #include <linux/audit.h>
+#include <linux/tracehook.h>
 
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
@@ -108,11 +106,17 @@ static inline void put_binfmt(struct linux_binfmt * fmt)
  */
 asmlinkage long sys_uselib(const char __user * library)
 {
-	struct file * file;
+	struct file *file;
 	struct nameidata nd;
-	int error;
-
-	error = __user_path_lookup_open(library, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);
+	char *tmp = getname(library);
+	int error = PTR_ERR(tmp);
+
+	if (!IS_ERR(tmp)) {
+		error = path_lookup_open(AT_FDCWD, tmp,
+					 LOOKUP_FOLLOW, &nd,
+					 FMODE_READ|FMODE_EXEC);
+		putname(tmp);
+	}
 	if (error)
 		goto out;
 
@@ -120,7 +124,11 @@ asmlinkage long sys_uselib(const char __user * library)
 	if (!S_ISREG(nd.path.dentry->d_inode->i_mode))
 		goto exit;
 
-	error = vfs_permission(&nd, MAY_READ | MAY_EXEC);
+	error = -EACCES;
+	if (nd.path.mnt->mnt_flags & MNT_NOEXEC)
+		goto exit;
+
+	error = vfs_permission(&nd, MAY_READ | MAY_EXEC | MAY_OPEN);
 	if (error)
 		goto exit;
 
@@ -541,7 +549,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, unsigned long shift)
 		/*
 		 * when the old and new regions overlap clear from new_end.
 		 */
-		free_pgd_range(&tlb, new_end, old_end, new_end,
+		free_pgd_range(tlb, new_end, old_end, new_end,
 			vma->vm_next ? vma->vm_next->vm_start : 0);
 	} else {
 		/*
@@ -550,7 +558,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, unsigned long shift)
 		 * have constraints on va-space that make this illegal (IA64) -
 		 * for the others its just a little faster.
 		 */
-		free_pgd_range(&tlb, old_start, old_end, new_end,
+		free_pgd_range(tlb, old_start, old_end, new_end,
 			vma->vm_next ? vma->vm_next->vm_start : 0);
 	}
 	tlb_finish_mmu(tlb, new_end, old_end);
@@ -658,38 +666,43 @@ EXPORT_SYMBOL(setup_arg_pages);
 struct file *open_exec(const char *name)
 {
 	struct nameidata nd;
-	int err;
 	struct file *file;
+	int err;
 
-	err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);
-	file = ERR_PTR(err);
-
-	if (!err) {
-		struct inode *inode = nd.path.dentry->d_inode;
-		file = ERR_PTR(-EACCES);
-		if (S_ISREG(inode->i_mode)) {
-			int err = vfs_permission(&nd, MAY_EXEC);
-			file = ERR_PTR(err);
-			if (!err) {
-				file = nameidata_to_filp(&nd,
-							O_RDONLY|O_LARGEFILE);
-				if (!IS_ERR(file)) {
-					err = deny_write_access(file);
-					if (err) {
-						fput(file);
-						file = ERR_PTR(err);
-					}
-				}
-out:
-				return file;
-			}
-		}
-		release_open_intent(&nd);
-		path_put(&nd.path);
+	err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd,
+				FMODE_READ|FMODE_EXEC);
+	if (err)
+		goto out;
+
+	err = -EACCES;
+	if (!S_ISREG(nd.path.dentry->d_inode->i_mode))
+		goto out_path_put;
+
+	if (nd.path.mnt->mnt_flags & MNT_NOEXEC)
+		goto out_path_put;
+
+	err = vfs_permission(&nd, MAY_EXEC | MAY_OPEN);
+	if (err)
+		goto out_path_put;
+
+	file = nameidata_to_filp(&nd, O_RDONLY|O_LARGEFILE);
+	if (IS_ERR(file))
+		return file;
+
+	err = deny_write_access(file);
+	if (err) {
+		fput(file);
+		goto out;
 	}
-	goto out;
-}
 
+	return file;
+
+ out_path_put:
+	release_open_intent(&nd);
+	path_put(&nd.path);
+ out:
+	return ERR_PTR(err);
+}
 EXPORT_SYMBOL(open_exec);
 
 int kernel_read(struct file *file, unsigned long offset,
@@ -724,12 +737,10 @@ static int exec_mmap(struct mm_struct *mm)
 		 * Make sure that if there is a core dump in progress
 		 * for the old mm, we get out and die instead of going
 		 * through with the exec.  We must hold mmap_sem around
-		 * checking core_waiters and changing tsk->mm.  The
-		 * core-inducing thread will increment core_waiters for
-		 * each thread whose ->mm == old_mm.
+		 * checking core_state and changing tsk->mm.
 		 */
 		down_read(&old_mm->mmap_sem);
-		if (unlikely(old_mm->core_waiters)) {
+		if (unlikely(old_mm->core_state)) {
 			up_read(&old_mm->mmap_sem);
 			return -EINTR;
 		}
@@ -1075,13 +1086,8 @@ EXPORT_SYMBOL(prepare_binprm);
 
 static int unsafe_exec(struct task_struct *p)
 {
-	int unsafe = 0;
-	if (p->ptrace & PT_PTRACED) {
-		if (p->ptrace & PT_PTRACE_CAP)
-			unsafe |= LSM_UNSAFE_PTRACE_CAP;
-		else
-			unsafe |= LSM_UNSAFE_PTRACE;
-	}
+	int unsafe = tracehook_unsafe_exec(p);
+
 	if (atomic_read(&p->fs->count) > 1 ||
 	    atomic_read(&p->files->count) > 1 ||
 	    atomic_read(&p->sighand->count) > 1)
@@ -1218,6 +1224,7 @@ int search_binary_handler(struct linux_binprm *bprm,struct pt_regs *regs)
 			read_unlock(&binfmt_lock);
 			retval = fn(bprm, regs);
 			if (retval >= 0) {
+				tracehook_report_exec(fmt, bprm, regs);
 				put_binfmt(fmt);
 				allow_write_access(bprm->file);
 				if (bprm->file)
@@ -1328,6 +1335,7 @@ int do_execve(char * filename,
 	if (retval < 0)
 		goto out;
 
+	current->flags &= ~PF_KTHREAD;
 	retval = search_binary_handler(bprm,regs);
 	if (retval >= 0) {
 		/* execve success */
@@ -1382,17 +1390,14 @@ EXPORT_SYMBOL(set_binfmt);
  * name into corename, which must have space for at least
  * CORENAME_MAX_SIZE bytes plus one byte for the zero terminator.
  */
-static int format_corename(char *corename, const char *pattern, long signr)
+static int format_corename(char *corename, int nr_threads, long signr)
 {
-	const char *pat_ptr = pattern;
+	const char *pat_ptr = core_pattern;
+	int ispipe = (*pat_ptr == '|');
 	char *out_ptr = corename;
 	char *const out_end = corename + CORENAME_MAX_SIZE;
 	int rc;
 	int pid_in_pattern = 0;
-	int ispipe = 0;
-
-	if (*pattern == '|')
-		ispipe = 1;
 
 	/* Repeat as long as we have more pattern to process and more output
 	   space */
@@ -1493,7 +1498,7 @@ static int format_corename(char *corename, const char *pattern, long signr)
 	 * and core_uses_pid is set, then .%pid will be appended to
 	 * the filename. Do not do this for piped commands. */
 	if (!ispipe && !pid_in_pattern
-            && (core_uses_pid || atomic_read(&current->mm->mm_users) != 1)) {
+	    && (core_uses_pid || nr_threads)) {
 		rc = snprintf(out_ptr, out_end - out_ptr,
 			      ".%d", task_tgid_vnr(current));
 		if (rc > out_end - out_ptr)
@@ -1505,9 +1510,10 @@ out:
 	return ispipe;
 }
 
-static void zap_process(struct task_struct *start)
+static int zap_process(struct task_struct *start)
 {
 	struct task_struct *t;
+	int nr = 0;
 
 	start->signal->flags = SIGNAL_GROUP_EXIT;
 	start->signal->group_stop_count = 0;
@@ -1515,72 +1521,99 @@ static void zap_process(struct task_struct *start)
 	t = start;
 	do {
 		if (t != current && t->mm) {
-			t->mm->core_waiters++;
 			sigaddset(&t->pending.signal, SIGKILL);
 			signal_wake_up(t, 1);
+			nr++;
 		}
-	} while ((t = next_thread(t)) != start);
+	} while_each_thread(start, t);
+
+	return nr;
 }
 
 static inline int zap_threads(struct task_struct *tsk, struct mm_struct *mm,
-				int exit_code)
+				struct core_state *core_state, int exit_code)
 {
 	struct task_struct *g, *p;
 	unsigned long flags;
-	int err = -EAGAIN;
+	int nr = -EAGAIN;
 
 	spin_lock_irq(&tsk->sighand->siglock);
 	if (!signal_group_exit(tsk->signal)) {
+		mm->core_state = core_state;
 		tsk->signal->group_exit_code = exit_code;
-		zap_process(tsk);
-		err = 0;
+		nr = zap_process(tsk);
 	}
 	spin_unlock_irq(&tsk->sighand->siglock);
-	if (err)
-		return err;
+	if (unlikely(nr < 0))
+		return nr;
 
-	if (atomic_read(&mm->mm_users) == mm->core_waiters + 1)
+	if (atomic_read(&mm->mm_users) == nr + 1)
 		goto done;
-
+	/*
+	 * We should find and kill all tasks which use this mm, and we should
+	 * count them correctly into ->nr_threads. We don't take tasklist
+	 * lock, but this is safe wrt:
+	 *
+	 * fork:
+	 *	None of sub-threads can fork after zap_process(leader). All
+	 *	processes which were created before this point should be
+	 *	visible to zap_threads() because copy_process() adds the new
+	 *	process to the tail of init_task.tasks list, and lock/unlock
+	 *	of ->siglock provides a memory barrier.
+	 *
+	 * do_exit:
+	 *	The caller holds mm->mmap_sem. This means that the task which
+	 *	uses this mm can't pass exit_mm(), so it can't exit or clear
+	 *	its ->mm.
+	 *
+	 * de_thread:
+	 *	It does list_replace_rcu(&leader->tasks, &current->tasks),
+	 *	we must see either old or new leader, this does not matter.
+	 *	However, it can change p->sighand, so lock_task_sighand(p)
+	 *	must be used. Since p->mm != NULL and we hold ->mmap_sem
+	 *	it can't fail.
+	 *
+	 *	Note also that "g" can be the old leader with ->mm == NULL
+	 *	and already unhashed and thus removed from ->thread_group.
+	 *	This is OK, __unhash_process()->list_del_rcu() does not
+	 *	clear the ->next pointer, we will find the new leader via
+	 *	next_thread().
+	 */
 	rcu_read_lock();
 	for_each_process(g) {
 		if (g == tsk->group_leader)
 			continue;
-
+		if (g->flags & PF_KTHREAD)
+			continue;
 		p = g;
 		do {
 			if (p->mm) {
-				if (p->mm == mm) {
-					/*
-					 * p->sighand can't disappear, but
-					 * may be changed by de_thread()
-					 */
+				if (unlikely(p->mm == mm)) {
 					lock_task_sighand(p, &flags);
-					zap_process(p);
+					nr += zap_process(p);
 					unlock_task_sighand(p, &flags);
 				}
 				break;
 			}
-		} while ((p = next_thread(p)) != g);
+		} while_each_thread(g, p);
 	}
 	rcu_read_unlock();
 done:
-	return mm->core_waiters;
+	atomic_set(&core_state->nr_threads, nr);
+	return nr;
 }
 
-static int coredump_wait(int exit_code)
+static int coredump_wait(int exit_code, struct core_state *core_state)
 {
 	struct task_struct *tsk = current;
 	struct mm_struct *mm = tsk->mm;
-	struct completion startup_done;
 	struct completion *vfork_done;
 	int core_waiters;
 
-	init_completion(&mm->core_done);
-	init_completion(&startup_done);
-	mm->core_startup_done = &startup_done;
-
-	core_waiters = zap_threads(tsk, mm, exit_code);
+	init_completion(&core_state->startup);
+	core_state->dumper.task = tsk;
+	core_state->dumper.next = NULL;
+	core_waiters = zap_threads(tsk, mm, core_state, exit_code);
 	up_write(&mm->mmap_sem);
 
 	if (unlikely(core_waiters < 0))
@@ -1597,12 +1630,32 @@ static int coredump_wait(int exit_code)
 	}
 
 	if (core_waiters)
-		wait_for_completion(&startup_done);
+		wait_for_completion(&core_state->startup);
 fail:
-	BUG_ON(mm->core_waiters);
 	return core_waiters;
 }
 
+static void coredump_finish(struct mm_struct *mm)
+{
+	struct core_thread *curr, *next;
+	struct task_struct *task;
+
+	next = mm->core_state->dumper.next;
+	while ((curr = next) != NULL) {
+		next = curr->next;
+		task = curr->task;
+		/*
+		 * see exit_mm(), curr->task must not see
+		 * ->task == NULL before we read ->next.
+		 */
+		smp_mb();
+		curr->task = NULL;
+		wake_up_process(task);
+	}
+
+	mm->core_state = NULL;
+}
+
 /*
  * set_dumpable converts traditional three-value dumpable to two flags and
  * stores them into mm->flags.  It modifies lower two bits of mm->flags, but
@@ -1654,6 +1707,7 @@ int get_dumpable(struct mm_struct *mm)
 
 int do_coredump(long signr, int exit_code, struct pt_regs * regs)
 {
+	struct core_state core_state;
 	char corename[CORENAME_MAX_SIZE + 1];
 	struct mm_struct *mm = current->mm;
 	struct linux_binfmt * binfmt;
@@ -1677,7 +1731,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
 	/*
 	 * If another thread got here first, or we are not dumpable, bail out.
 	 */
-	if (mm->core_waiters || !get_dumpable(mm)) {
+	if (mm->core_state || !get_dumpable(mm)) {
 		up_write(&mm->mmap_sem);
 		goto fail;
 	}
@@ -1692,7 +1746,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
 		current->fsuid = 0;	/* Dump root private */
 	}
 
-	retval = coredump_wait(exit_code);
+	retval = coredump_wait(exit_code, &core_state);
 	if (retval < 0)
 		goto fail;
 
@@ -1707,7 +1761,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
 	 * uses lock_kernel()
 	 */
  	lock_kernel();
-	ispipe = format_corename(corename, core_pattern, signr);
+	ispipe = format_corename(corename, retval, signr);
 	unlock_kernel();
 	/*
 	 * Don't bother to check the RLIMIT_CORE value if core_pattern points
@@ -1786,7 +1840,7 @@ fail_unlock:
 		argv_free(helper_argv);
 
 	current->fsuid = fsuid;
-	complete_all(&mm->core_done);
+	coredump_finish(mm);
 fail:
 	return retval;
 }
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index e58669e1b87c..ae8c4f850b27 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -294,7 +294,7 @@ ext2_check_acl(struct inode *inode, int mask)
 }
 
 int
-ext2_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext2_permission(struct inode *inode, int mask)
 {
 	return generic_permission(inode, mask, ext2_check_acl);
 }
diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h
index 0bde85bafe38..b42cf578554b 100644
--- a/fs/ext2/acl.h
+++ b/fs/ext2/acl.h
@@ -58,7 +58,7 @@ static inline int ext2_acl_count(size_t size)
 #define EXT2_ACL_NOT_CACHED ((void *)-1)
 
 /* acl.c */
-extern int ext2_permission (struct inode *, int, struct nameidata *);
+extern int ext2_permission (struct inode *, int);
 extern int ext2_acl_chmod (struct inode *);
 extern int ext2_init_acl (struct inode *, struct inode *);
 
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index ef50cbc792db..fd88c7b43e66 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -31,6 +31,7 @@
 #include <linux/seq_file.h>
 #include <linux/mount.h>
 #include <linux/log2.h>
+#include <linux/quotaops.h>
 #include <asm/uaccess.h>
 #include "ext2.h"
 #include "xattr.h"
@@ -158,7 +159,7 @@ static void ext2_destroy_inode(struct inode *inode)
 	kmem_cache_free(ext2_inode_cachep, EXT2_I(inode));
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct ext2_inode_info *ei = (struct ext2_inode_info *) foo;
 
diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c
index eaa23d2d5213..70c0dbdcdcb7 100644
--- a/fs/ext2/xattr_security.c
+++ b/fs/ext2/xattr_security.c
@@ -14,7 +14,7 @@ static size_t
 ext2_xattr_security_list(struct inode *inode, char *list, size_t list_size,
 			 const char *name, size_t name_len)
 {
-	const int prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
+	const int prefix_len = XATTR_SECURITY_PREFIX_LEN;
 	const size_t total_len = prefix_len + name_len + 1;
 
 	if (list && total_len <= list_size) {
diff --git a/fs/ext2/xattr_trusted.c b/fs/ext2/xattr_trusted.c
index 83ee149f353d..e8219f8eae9f 100644
--- a/fs/ext2/xattr_trusted.c
+++ b/fs/ext2/xattr_trusted.c
@@ -12,13 +12,11 @@
 #include <linux/ext2_fs.h>
 #include "xattr.h"
 
-#define XATTR_TRUSTED_PREFIX "trusted."
-
 static size_t
 ext2_xattr_trusted_list(struct inode *inode, char *list, size_t list_size,
 			const char *name, size_t name_len)
 {
-	const int prefix_len = sizeof(XATTR_TRUSTED_PREFIX)-1;
+	const int prefix_len = XATTR_TRUSTED_PREFIX_LEN;
 	const size_t total_len = prefix_len + name_len + 1;
 
 	if (!capable(CAP_SYS_ADMIN))
diff --git a/fs/ext2/xattr_user.c b/fs/ext2/xattr_user.c
index f383e7c3a7b5..92495d28c62f 100644
--- a/fs/ext2/xattr_user.c
+++ b/fs/ext2/xattr_user.c
@@ -11,13 +11,11 @@
 #include "ext2.h"
 #include "xattr.h"
 
-#define XATTR_USER_PREFIX "user."
-
 static size_t
 ext2_xattr_user_list(struct inode *inode, char *list, size_t list_size,
 		     const char *name, size_t name_len)
 {
-	const size_t prefix_len = sizeof(XATTR_USER_PREFIX)-1;
+	const size_t prefix_len = XATTR_USER_PREFIX_LEN;
 	const size_t total_len = prefix_len + name_len + 1;
 
 	if (!test_opt(inode->i_sb, XATTR_USER))
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index a754d1848173..b60bb241880c 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -299,7 +299,7 @@ ext3_check_acl(struct inode *inode, int mask)
 }
 
 int
-ext3_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext3_permission(struct inode *inode, int mask)
 {
 	return generic_permission(inode, mask, ext3_check_acl);
 }
diff --git a/fs/ext3/acl.h b/fs/ext3/acl.h
index 0d1e6279cbfd..42da16b8cac0 100644
--- a/fs/ext3/acl.h
+++ b/fs/ext3/acl.h
@@ -58,7 +58,7 @@ static inline int ext3_acl_count(size_t size)
 #define EXT3_ACL_NOT_CACHED ((void *)-1)
 
 /* acl.c */
-extern int ext3_permission (struct inode *, int, struct nameidata *);
+extern int ext3_permission (struct inode *, int);
 extern int ext3_acl_chmod (struct inode *);
 extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
 
diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c
index 8ca3bfd72427..2eea96ec78ed 100644
--- a/fs/ext3/dir.c
+++ b/fs/ext3/dir.c
@@ -272,7 +272,7 @@ static void free_rb_tree_fname(struct rb_root *root)
 
 	while (n) {
 		/* Do the node's children first */
-		if ((n)->rb_left) {
+		if (n->rb_left) {
 			n = n->rb_left;
 			continue;
 		}
@@ -301,24 +301,18 @@ static void free_rb_tree_fname(struct rb_root *root)
 			parent->rb_right = NULL;
 		n = parent;
 	}
-	root->rb_node = NULL;
 }
 
 
-static struct dir_private_info *create_dir_info(loff_t pos)
+static struct dir_private_info *ext3_htree_create_dir_info(loff_t pos)
 {
 	struct dir_private_info *p;
 
-	p = kmalloc(sizeof(struct dir_private_info), GFP_KERNEL);
+	p = kzalloc(sizeof(struct dir_private_info), GFP_KERNEL);
 	if (!p)
 		return NULL;
-	p->root.rb_node = NULL;
-	p->curr_node = NULL;
-	p->extra_fname = NULL;
-	p->last_pos = 0;
 	p->curr_hash = pos2maj_hash(pos);
 	p->curr_minor_hash = pos2min_hash(pos);
-	p->next_hash = 0;
 	return p;
 }
 
@@ -433,7 +427,7 @@ static int ext3_dx_readdir(struct file * filp,
 	int	ret;
 
 	if (!info) {
-		info = create_dir_info(filp->f_pos);
+		info = ext3_htree_create_dir_info(filp->f_pos);
 		if (!info)
 			return -ENOMEM;
 		filp->private_data = info;
diff --git a/fs/ext3/ialloc.c b/fs/ext3/ialloc.c
index 77126821b2e9..47b678d73e7a 100644
--- a/fs/ext3/ialloc.c
+++ b/fs/ext3/ialloc.c
@@ -669,6 +669,14 @@ struct inode *ext3_orphan_get(struct super_block *sb, unsigned long ino)
 	if (IS_ERR(inode))
 		goto iget_failed;
 
+	/*
+	 * If the orphans has i_nlinks > 0 then it should be able to be
+	 * truncated, otherwise it won't be removed from the orphan list
+	 * during processing and an infinite loop will result.
+	 */
+	if (inode->i_nlink && !ext3_can_truncate(inode))
+		goto bad_orphan;
+
 	if (NEXT_ORPHAN(inode) > max_ino)
 		goto bad_orphan;
 	brelse(bitmap_bh);
@@ -690,6 +698,7 @@ bad_orphan:
 		printk(KERN_NOTICE "NEXT_ORPHAN(inode)=%u\n",
 		       NEXT_ORPHAN(inode));
 		printk(KERN_NOTICE "max_ino=%lu\n", max_ino);
+		printk(KERN_NOTICE "i_nlink=%u\n", inode->i_nlink);
 		/* Avoid freeing blocks if we got a bad deleted inode */
 		if (inode->i_nlink == 0)
 			inode->i_blocks = 0;
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 6ae4ecf3ce40..3bf07d70b914 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -2127,7 +2127,21 @@ static void ext3_free_data(handle_t *handle, struct inode *inode,
 
 	if (this_bh) {
 		BUFFER_TRACE(this_bh, "call ext3_journal_dirty_metadata");
-		ext3_journal_dirty_metadata(handle, this_bh);
+
+		/*
+		 * The buffer head should have an attached journal head at this
+		 * point. However, if the data is corrupted and an indirect
+		 * block pointed to itself, it would have been detached when
+		 * the block was cleared. Check for this instead of OOPSing.
+		 */
+		if (bh2jh(this_bh))
+			ext3_journal_dirty_metadata(handle, this_bh);
+		else
+			ext3_error(inode->i_sb, "ext3_free_data",
+				   "circular indirect block detected, "
+				   "inode=%lu, block=%llu",
+				   inode->i_ino,
+				   (unsigned long long)this_bh->b_blocknr);
 	}
 }
 
@@ -2253,6 +2267,19 @@ static void ext3_free_branches(handle_t *handle, struct inode *inode,
 	}
 }
 
+int ext3_can_truncate(struct inode *inode)
+{
+	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+		return 0;
+	if (S_ISREG(inode->i_mode))
+		return 1;
+	if (S_ISDIR(inode->i_mode))
+		return 1;
+	if (S_ISLNK(inode->i_mode))
+		return !ext3_inode_is_fast_symlink(inode);
+	return 0;
+}
+
 /*
  * ext3_truncate()
  *
@@ -2297,12 +2324,7 @@ void ext3_truncate(struct inode *inode)
 	unsigned blocksize = inode->i_sb->s_blocksize;
 	struct page *page;
 
-	if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-	    S_ISLNK(inode->i_mode)))
-		return;
-	if (ext3_inode_is_fast_symlink(inode))
-		return;
-	if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
+	if (!ext3_can_truncate(inode))
 		return;
 
 	/*
@@ -2513,6 +2535,16 @@ static int __ext3_get_inode_loc(struct inode *inode,
 	}
 	if (!buffer_uptodate(bh)) {
 		lock_buffer(bh);
+
+		/*
+		 * If the buffer has the write error flag, we have failed
+		 * to write out another inode in the same block.  In this
+		 * case, we don't have to read the block because we may
+		 * read the old inode data successfully.
+		 */
+		if (buffer_write_io_error(bh) && !buffer_uptodate(bh))
+			set_buffer_uptodate(bh);
+
 		if (buffer_uptodate(bh)) {
 			/* someone brought it uptodate while we waited */
 			unlock_buffer(bh);
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 0b8cf80154f1..de13e919cd81 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -240,13 +240,13 @@ static inline unsigned dx_root_limit (struct inode *dir, unsigned infosize)
 {
 	unsigned entry_space = dir->i_sb->s_blocksize - EXT3_DIR_REC_LEN(1) -
 		EXT3_DIR_REC_LEN(2) - infosize;
-	return 0? 20: entry_space / sizeof(struct dx_entry);
+	return entry_space / sizeof(struct dx_entry);
 }
 
 static inline unsigned dx_node_limit (struct inode *dir)
 {
 	unsigned entry_space = dir->i_sb->s_blocksize - EXT3_DIR_REC_LEN(0);
-	return 0? 22: entry_space / sizeof(struct dx_entry);
+	return entry_space / sizeof(struct dx_entry);
 }
 
 /*
@@ -991,19 +991,21 @@ static struct buffer_head * ext3_dx_find_entry(struct dentry *dentry,
 		de = (struct ext3_dir_entry_2 *) bh->b_data;
 		top = (struct ext3_dir_entry_2 *) ((char *) de + sb->s_blocksize -
 				       EXT3_DIR_REC_LEN(0));
-		for (; de < top; de = ext3_next_entry(de))
-		if (ext3_match (namelen, name, de)) {
-			if (!ext3_check_dir_entry("ext3_find_entry",
-						  dir, de, bh,
-				  (block<<EXT3_BLOCK_SIZE_BITS(sb))
-					  +((char *)de - bh->b_data))) {
-				brelse (bh);
+		for (; de < top; de = ext3_next_entry(de)) {
+			int off = (block << EXT3_BLOCK_SIZE_BITS(sb))
+				  + ((char *) de - bh->b_data);
+
+			if (!ext3_check_dir_entry(__func__, dir, de, bh, off)) {
+				brelse(bh);
 				*err = ERR_BAD_DX_DIR;
 				goto errout;
 			}
-			*res_dir = de;
-			dx_release (frames);
-			return bh;
+
+			if (ext3_match(namelen, name, de)) {
+				*res_dir = de;
+				dx_release(frames);
+				return bh;
+			}
 		}
 		brelse (bh);
 		/* Check to see if we should continue to search */
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 2845425077e8..8ddced384674 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -472,7 +472,7 @@ static void ext3_destroy_inode(struct inode *inode)
 	kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
 
@@ -842,7 +842,7 @@ static int parse_options (char *options, struct super_block *sb,
 	int data_opt = 0;
 	int option;
 #ifdef CONFIG_QUOTA
-	int qtype;
+	int qtype, qfmt;
 	char *qname;
 #endif
 
@@ -1018,9 +1018,11 @@ static int parse_options (char *options, struct super_block *sb,
 		case Opt_grpjquota:
 			qtype = GRPQUOTA;
 set_qf_name:
-			if (sb_any_quota_enabled(sb)) {
+			if ((sb_any_quota_enabled(sb) ||
+			     sb_any_quota_suspended(sb)) &&
+			    !sbi->s_qf_names[qtype]) {
 				printk(KERN_ERR
-					"EXT3-fs: Cannot change journalled "
+					"EXT3-fs: Cannot change journaled "
 					"quota options when quota turned on.\n");
 				return 0;
 			}
@@ -1056,9 +1058,11 @@ set_qf_name:
 		case Opt_offgrpjquota:
 			qtype = GRPQUOTA;
 clear_qf_name:
-			if (sb_any_quota_enabled(sb)) {
+			if ((sb_any_quota_enabled(sb) ||
+			     sb_any_quota_suspended(sb)) &&
+			    sbi->s_qf_names[qtype]) {
 				printk(KERN_ERR "EXT3-fs: Cannot change "
-					"journalled quota options when "
+					"journaled quota options when "
 					"quota turned on.\n");
 				return 0;
 			}
@@ -1069,10 +1073,20 @@ clear_qf_name:
 			sbi->s_qf_names[qtype] = NULL;
 			break;
 		case Opt_jqfmt_vfsold:
-			sbi->s_jquota_fmt = QFMT_VFS_OLD;
-			break;
+			qfmt = QFMT_VFS_OLD;
+			goto set_qf_format;
 		case Opt_jqfmt_vfsv0:
-			sbi->s_jquota_fmt = QFMT_VFS_V0;
+			qfmt = QFMT_VFS_V0;
+set_qf_format:
+			if ((sb_any_quota_enabled(sb) ||
+			     sb_any_quota_suspended(sb)) &&
+			    sbi->s_jquota_fmt != qfmt) {
+				printk(KERN_ERR "EXT3-fs: Cannot change "
+					"journaled quota options when "
+					"quota turned on.\n");
+				return 0;
+			}
+			sbi->s_jquota_fmt = qfmt;
 			break;
 		case Opt_quota:
 		case Opt_usrquota:
@@ -1084,7 +1098,8 @@ clear_qf_name:
 			set_opt(sbi->s_mount_opt, GRPQUOTA);
 			break;
 		case Opt_noquota:
-			if (sb_any_quota_enabled(sb)) {
+			if (sb_any_quota_enabled(sb) ||
+			    sb_any_quota_suspended(sb)) {
 				printk(KERN_ERR "EXT3-fs: Cannot change quota "
 					"options when quota turned on.\n");
 				return 0;
@@ -1169,14 +1184,14 @@ clear_qf_name:
 		}
 
 		if (!sbi->s_jquota_fmt) {
-			printk(KERN_ERR "EXT3-fs: journalled quota format "
+			printk(KERN_ERR "EXT3-fs: journaled quota format "
 					"not specified.\n");
 			return 0;
 		}
 	} else {
 		if (sbi->s_jquota_fmt) {
-			printk(KERN_ERR "EXT3-fs: journalled quota format "
-					"specified with no journalling "
+			printk(KERN_ERR "EXT3-fs: journaled quota format "
+					"specified with no journaling "
 					"enabled.\n");
 			return 0;
 		}
@@ -1370,7 +1385,7 @@ static void ext3_orphan_cleanup (struct super_block * sb,
 			int ret = ext3_quota_on_mount(sb, i);
 			if (ret < 0)
 				printk(KERN_ERR
-					"EXT3-fs: Cannot turn on journalled "
+					"EXT3-fs: Cannot turn on journaled "
 					"quota: error %d\n", ret);
 		}
 	}
@@ -2712,7 +2727,7 @@ static int ext3_release_dquot(struct dquot *dquot)
 
 static int ext3_mark_dquot_dirty(struct dquot *dquot)
 {
-	/* Are we journalling quotas? */
+	/* Are we journaling quotas? */
 	if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
 	    EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
 		dquot_mark_dquot_dirty(dquot);
@@ -2759,23 +2774,42 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id,
 
 	if (!test_opt(sb, QUOTA))
 		return -EINVAL;
-	/* Not journalling quota or remount? */
-	if ((!EXT3_SB(sb)->s_qf_names[USRQUOTA] &&
-	    !EXT3_SB(sb)->s_qf_names[GRPQUOTA]) || remount)
+	/* When remounting, no checks are needed and in fact, path is NULL */
+	if (remount)
 		return vfs_quota_on(sb, type, format_id, path, remount);
+
 	err = path_lookup(path, LOOKUP_FOLLOW, &nd);
 	if (err)
 		return err;
+
 	/* Quotafile not on the same filesystem? */
 	if (nd.path.mnt->mnt_sb != sb) {
 		path_put(&nd.path);
 		return -EXDEV;
 	}
-	/* Quotafile not in fs root? */
-	if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
-		printk(KERN_WARNING
-			"EXT3-fs: Quota file not on filesystem root. "
-			"Journalled quota will not work.\n");
+	/* Journaling quota? */
+	if (EXT3_SB(sb)->s_qf_names[type]) {
+		/* Quotafile not of fs root? */
+		if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
+			printk(KERN_WARNING
+				"EXT3-fs: Quota file not on filesystem root. "
+				"Journaled quota will not work.\n");
+	}
+
+	/*
+	 * When we journal data on quota file, we have to flush journal to see
+	 * all updates to the file when we bypass pagecache...
+	 */
+	if (ext3_should_journal_data(nd.path.dentry->d_inode)) {
+		/*
+		 * We don't need to lock updates but journal_flush() could
+		 * otherwise be livelocked...
+		 */
+		journal_lock_updates(EXT3_SB(sb)->s_journal);
+		journal_flush(EXT3_SB(sb)->s_journal);
+		journal_unlock_updates(EXT3_SB(sb)->s_journal);
+	}
+
 	path_put(&nd.path);
 	return vfs_quota_on(sb, type, format_id, path, remount);
 }
diff --git a/fs/ext3/xattr_security.c b/fs/ext3/xattr_security.c
index 821efaf2b94e..37b81097bdf2 100644
--- a/fs/ext3/xattr_security.c
+++ b/fs/ext3/xattr_security.c
@@ -15,7 +15,7 @@ static size_t
 ext3_xattr_security_list(struct inode *inode, char *list, size_t list_size,
 			 const char *name, size_t name_len)
 {
-	const size_t prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
+	const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
 	const size_t total_len = prefix_len + name_len + 1;
 
 
diff --git a/fs/ext3/xattr_trusted.c b/fs/ext3/xattr_trusted.c
index 0327497a55ce..c7c41a410c4b 100644
--- a/fs/ext3/xattr_trusted.c
+++ b/fs/ext3/xattr_trusted.c
@@ -13,13 +13,11 @@
 #include <linux/ext3_fs.h>
 #include "xattr.h"
 
-#define XATTR_TRUSTED_PREFIX "trusted."
-
 static size_t
 ext3_xattr_trusted_list(struct inode *inode, char *list, size_t list_size,
 			const char *name, size_t name_len)
 {
-	const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX)-1;
+	const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
 	const size_t total_len = prefix_len + name_len + 1;
 
 	if (!capable(CAP_SYS_ADMIN))
diff --git a/fs/ext3/xattr_user.c b/fs/ext3/xattr_user.c
index 1abd8f92c440..430fe63b31b3 100644
--- a/fs/ext3/xattr_user.c
+++ b/fs/ext3/xattr_user.c
@@ -12,13 +12,11 @@
 #include <linux/ext3_fs.h>
 #include "xattr.h"
 
-#define XATTR_USER_PREFIX "user."
-
 static size_t
 ext3_xattr_user_list(struct inode *inode, char *list, size_t list_size,
 		     const char *name, size_t name_len)
 {
-	const size_t prefix_len = sizeof(XATTR_USER_PREFIX)-1;
+	const size_t prefix_len = XATTR_USER_PREFIX_LEN;
 	const size_t total_len = prefix_len + name_len + 1;
 
 	if (!test_opt(inode->i_sb, XATTR_USER))
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 3c8dab880d91..c7d04e165446 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -299,7 +299,7 @@ ext4_check_acl(struct inode *inode, int mask)
 }
 
 int
-ext4_permission(struct inode *inode, int mask, struct nameidata *nd)
+ext4_permission(struct inode *inode, int mask)
 {
 	return generic_permission(inode, mask, ext4_check_acl);
 }
diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h
index 26a5c1abf147..cd2b855a07d6 100644
--- a/fs/ext4/acl.h
+++ b/fs/ext4/acl.h
@@ -58,7 +58,7 @@ static inline int ext4_acl_count(size_t size)
 #define EXT4_ACL_NOT_CACHED ((void *)-1)
 
 /* acl.c */
-extern int ext4_permission (struct inode *, int, struct nameidata *);
+extern int ext4_permission (struct inode *, int);
 extern int ext4_acl_chmod (struct inode *);
 extern int ext4_init_acl (handle_t *, struct inode *, struct inode *);
 
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1cb371dcd609..b5479b1dff14 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -595,7 +595,7 @@ static void ext4_destroy_inode(struct inode *inode)
 	kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct ext4_inode_info *ei = (struct ext4_inode_info *) foo;
 
diff --git a/fs/fat/cache.c b/fs/fat/cache.c
index 3a9ecac8d61f..3222f51c41cf 100644
--- a/fs/fat/cache.c
+++ b/fs/fat/cache.c
@@ -36,7 +36,7 @@ static inline int fat_max_cache(struct inode *inode)
 
 static struct kmem_cache *fat_cache_cachep;
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct fat_cache *cache = (struct fat_cache *)foo;
 
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 34541d06e626..cd4a0162e10d 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -17,7 +17,6 @@
 #include <linux/slab.h>
 #include <linux/time.h>
 #include <linux/msdos_fs.h>
-#include <linux/dirent.h>
 #include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include <linux/compat.h>
@@ -124,10 +123,11 @@ static inline int fat_get_entry(struct inode *dir, loff_t *pos,
  * but ignore that right now.
  * Ahem... Stack smashing in ring 0 isn't fun. Fixed.
  */
-static int uni16_to_x8(unsigned char *ascii, wchar_t *uni, int len,
+static int uni16_to_x8(unsigned char *ascii, const wchar_t *uni, int len,
 		       int uni_xlate, struct nls_table *nls)
 {
-	wchar_t *ip, ec;
+	const wchar_t *ip;
+	wchar_t ec;
 	unsigned char *op, nc;
 	int charlen;
 	int k;
@@ -167,6 +167,16 @@ static int uni16_to_x8(unsigned char *ascii, wchar_t *uni, int len,
 	return (op - ascii);
 }
 
+static inline int fat_uni_to_x8(struct msdos_sb_info *sbi, const wchar_t *uni,
+				unsigned char *buf, int size)
+{
+	if (sbi->options.utf8)
+		return utf8_wcstombs(buf, uni, size);
+	else
+		return uni16_to_x8(buf, uni, size, sbi->options.unicode_xlate,
+				   sbi->nls_io);
+}
+
 static inline int
 fat_short2uni(struct nls_table *t, unsigned char *c, int clen, wchar_t *uni)
 {
@@ -227,6 +237,19 @@ fat_shortname2uni(struct nls_table *nls, unsigned char *buf, int buf_size,
 	return len;
 }
 
+static inline int fat_name_match(struct msdos_sb_info *sbi,
+				 const unsigned char *a, int a_len,
+				 const unsigned char *b, int b_len)
+{
+	if (a_len != b_len)
+		return 0;
+
+	if (sbi->options.name_check != 's')
+		return !nls_strnicmp(sbi->nls_io, a, b, a_len);
+	else
+		return !memcmp(a, b, a_len);
+}
+
 enum { PARSE_INVALID = 1, PARSE_NOT_LONGNAME, PARSE_EOF, };
 
 /**
@@ -302,6 +325,19 @@ parse_long:
 }
 
 /*
+ * Maximum buffer size of short name.
+ * [(MSDOS_NAME + '.') * max one char + nul]
+ * For msdos style, ['.' (hidden) + MSDOS_NAME + '.' + nul]
+ */
+#define FAT_MAX_SHORT_SIZE	((MSDOS_NAME + 1) * NLS_MAX_CHARSET_SIZE + 1)
+/*
+ * Maximum buffer size of unicode chars from slots.
+ * [(max longname slots * 13 (size in a slot) + nul) * sizeof(wchar_t)]
+ */
+#define FAT_MAX_UNI_CHARS	((MSDOS_SLOTS - 1) * 13 + 1)
+#define FAT_MAX_UNI_SIZE	(FAT_MAX_UNI_CHARS * sizeof(wchar_t))
+
+/*
  * Return values: negative -> error, 0 -> not found, positive -> found,
  * value is the total amount of slots, including the shortname entry.
  */
@@ -312,29 +348,20 @@ int fat_search_long(struct inode *inode, const unsigned char *name,
 	struct msdos_sb_info *sbi = MSDOS_SB(sb);
 	struct buffer_head *bh = NULL;
 	struct msdos_dir_entry *de;
-	struct nls_table *nls_io = sbi->nls_io;
 	struct nls_table *nls_disk = sbi->nls_disk;
-	wchar_t bufuname[14];
 	unsigned char nr_slots;
-	int xlate_len;
+	wchar_t bufuname[14];
 	wchar_t *unicode = NULL;
 	unsigned char work[MSDOS_NAME];
-	unsigned char *bufname = NULL;
-	int uni_xlate = sbi->options.unicode_xlate;
-	int utf8 = sbi->options.utf8;
-	int anycase = (sbi->options.name_check != 's');
+	unsigned char bufname[FAT_MAX_SHORT_SIZE];
 	unsigned short opt_shortname = sbi->options.shortname;
 	loff_t cpos = 0;
-	int chl, i, j, last_u, err;
-
-	bufname = __getname();
-	if (!bufname)
-		return -ENOMEM;
+	int chl, i, j, last_u, err, len;
 
 	err = -ENOENT;
-	while(1) {
+	while (1) {
 		if (fat_get_entry(inode, &cpos, &bh, &de) == -1)
-			goto EODir;
+			goto end_of_dir;
 parse_record:
 		nr_slots = 0;
 		if (de->name[0] == DELETED_FLAG)
@@ -353,7 +380,7 @@ parse_record:
 			else if (status == PARSE_NOT_LONGNAME)
 				goto parse_record;
 			else if (status == PARSE_EOF)
-				goto EODir;
+				goto end_of_dir;
 		}
 
 		memcpy(work, de->name, sizeof(de->name));
@@ -394,30 +421,24 @@ parse_record:
 		if (!last_u)
 			continue;
 
+		/* Compare shortname */
 		bufuname[last_u] = 0x0000;
-		xlate_len = utf8
-			?utf8_wcstombs(bufname, bufuname, PATH_MAX)
-			:uni16_to_x8(bufname, bufuname, PATH_MAX, uni_xlate, nls_io);
-		if (xlate_len == name_len)
-			if ((!anycase && !memcmp(name, bufname, xlate_len)) ||
-			    (anycase && !nls_strnicmp(nls_io, name, bufname,
-								xlate_len)))
-				goto Found;
+		len = fat_uni_to_x8(sbi, bufuname, bufname, sizeof(bufname));
+		if (fat_name_match(sbi, name, name_len, bufname, len))
+			goto found;
 
 		if (nr_slots) {
-			xlate_len = utf8
-				?utf8_wcstombs(bufname, unicode, PATH_MAX)
-				:uni16_to_x8(bufname, unicode, PATH_MAX, uni_xlate, nls_io);
-			if (xlate_len != name_len)
-				continue;
-			if ((!anycase && !memcmp(name, bufname, xlate_len)) ||
-			    (anycase && !nls_strnicmp(nls_io, name, bufname,
-								xlate_len)))
-				goto Found;
+			void *longname = unicode + FAT_MAX_UNI_CHARS;
+			int size = PATH_MAX - FAT_MAX_UNI_SIZE;
+
+			/* Compare longname */
+			len = fat_uni_to_x8(sbi, unicode, longname, size);
+			if (fat_name_match(sbi, name, name_len, longname, len))
+				goto found;
 		}
 	}
 
-Found:
+found:
 	nr_slots++;	/* include the de */
 	sinfo->slot_off = cpos - nr_slots * sizeof(*de);
 	sinfo->nr_slots = nr_slots;
@@ -425,9 +446,7 @@ Found:
 	sinfo->bh = bh;
 	sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
 	err = 0;
-EODir:
-	if (bufname)
-		__putname(bufname);
+end_of_dir:
 	if (unicode)
 		__putname(unicode);
 
@@ -453,23 +472,20 @@ static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent,
 	struct msdos_sb_info *sbi = MSDOS_SB(sb);
 	struct buffer_head *bh;
 	struct msdos_dir_entry *de;
-	struct nls_table *nls_io = sbi->nls_io;
 	struct nls_table *nls_disk = sbi->nls_disk;
-	unsigned char long_slots;
-	const char *fill_name;
-	int fill_len;
+	unsigned char nr_slots;
 	wchar_t bufuname[14];
 	wchar_t *unicode = NULL;
-	unsigned char c, work[MSDOS_NAME], bufname[56], *ptname = bufname;
-	unsigned long lpos, dummy, *furrfu = &lpos;
-	int uni_xlate = sbi->options.unicode_xlate;
+	unsigned char c, work[MSDOS_NAME];
+	unsigned char bufname[FAT_MAX_SHORT_SIZE], *ptname = bufname;
+	unsigned short opt_shortname = sbi->options.shortname;
 	int isvfat = sbi->options.isvfat;
-	int utf8 = sbi->options.utf8;
 	int nocase = sbi->options.nocase;
-	unsigned short opt_shortname = sbi->options.shortname;
+	const char *fill_name = NULL;
 	unsigned long inum;
-	int chi, chl, i, i2, j, last, last_u, dotoffset = 0;
+	unsigned long lpos, dummy, *furrfu = &lpos;
 	loff_t cpos;
+	int chi, chl, i, i2, j, last, last_u, dotoffset = 0, fill_len = 0;
 	int ret = 0;
 
 	lock_super(sb);
@@ -489,43 +505,58 @@ static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent,
 			cpos = 0;
 		}
 	}
-	if (cpos & (sizeof(struct msdos_dir_entry)-1)) {
+	if (cpos & (sizeof(struct msdos_dir_entry) - 1)) {
 		ret = -ENOENT;
 		goto out;
 	}
 
 	bh = NULL;
-GetNew:
+get_new:
 	if (fat_get_entry(inode, &cpos, &bh, &de) == -1)
-		goto EODir;
+		goto end_of_dir;
 parse_record:
-	long_slots = 0;
-	/* Check for long filename entry */
-	if (isvfat) {
+	nr_slots = 0;
+	/*
+	 * Check for long filename entry, but if short_only, we don't
+	 * need to parse long filename.
+	 */
+	if (isvfat && !short_only) {
 		if (de->name[0] == DELETED_FLAG)
-			goto RecEnd;
+			goto record_end;
 		if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME))
-			goto RecEnd;
+			goto record_end;
 		if (de->attr != ATTR_EXT && IS_FREE(de->name))
-			goto RecEnd;
+			goto record_end;
 	} else {
 		if ((de->attr & ATTR_VOLUME) || IS_FREE(de->name))
-			goto RecEnd;
+			goto record_end;
 	}
 
 	if (isvfat && de->attr == ATTR_EXT) {
 		int status = fat_parse_long(inode, &cpos, &bh, &de,
-					    &unicode, &long_slots);
+					    &unicode, &nr_slots);
 		if (status < 0) {
 			filp->f_pos = cpos;
 			ret = status;
 			goto out;
 		} else if (status == PARSE_INVALID)
-			goto RecEnd;
+			goto record_end;
 		else if (status == PARSE_NOT_LONGNAME)
 			goto parse_record;
 		else if (status == PARSE_EOF)
-			goto EODir;
+			goto end_of_dir;
+
+		if (nr_slots) {
+			void *longname = unicode + FAT_MAX_UNI_CHARS;
+			int size = PATH_MAX - FAT_MAX_UNI_SIZE;
+			int len = fat_uni_to_x8(sbi, unicode, longname, size);
+
+			fill_name = longname;
+			fill_len = len;
+			/* !both && !short_only, so we don't need shortname. */
+			if (!both)
+				goto start_filldir;
+		}
 	}
 
 	if (sbi->options.dotsOK) {
@@ -587,12 +618,32 @@ parse_record:
 		}
 	}
 	if (!last)
-		goto RecEnd;
+		goto record_end;
 
 	i = last + dotoffset;
 	j = last_u;
 
-	lpos = cpos - (long_slots+1)*sizeof(struct msdos_dir_entry);
+	if (isvfat) {
+		bufuname[j] = 0x0000;
+		i = fat_uni_to_x8(sbi, bufuname, bufname, sizeof(bufname));
+	}
+	if (nr_slots) {
+		/* hack for fat_ioctl_filldir() */
+		struct fat_ioctl_filldir_callback *p = dirent;
+
+		p->longname = fill_name;
+		p->long_len = fill_len;
+		p->shortname = bufname;
+		p->short_len = i;
+		fill_name = NULL;
+		fill_len = 0;
+	} else {
+		fill_name = bufname;
+		fill_len = i;
+	}
+
+start_filldir:
+	lpos = cpos - (nr_slots + 1) * sizeof(struct msdos_dir_entry);
 	if (!memcmp(de->name, MSDOS_DOT, MSDOS_NAME))
 		inum = inode->i_ino;
 	else if (!memcmp(de->name, MSDOS_DOTDOT, MSDOS_NAME)) {
@@ -607,49 +658,17 @@ parse_record:
 			inum = iunique(sb, MSDOS_ROOT_INO);
 	}
 
-	if (isvfat) {
-		bufuname[j] = 0x0000;
-		i = utf8 ? utf8_wcstombs(bufname, bufuname, sizeof(bufname))
-			 : uni16_to_x8(bufname, bufuname, sizeof(bufname), uni_xlate, nls_io);
-	}
-
-	fill_name = bufname;
-	fill_len = i;
-	if (!short_only && long_slots) {
-		/* convert the unicode long name. 261 is maximum size
-		 * of unicode buffer. (13 * slots + nul) */
-		void *longname = unicode + 261;
-		int buf_size = PATH_MAX - (261 * sizeof(unicode[0]));
-		int long_len = utf8
-			? utf8_wcstombs(longname, unicode, buf_size)
-			: uni16_to_x8(longname, unicode, buf_size, uni_xlate, nls_io);
-
-		if (!both) {
-			fill_name = longname;
-			fill_len = long_len;
-		} else {
-			/* hack for fat_ioctl_filldir() */
-			struct fat_ioctl_filldir_callback *p = dirent;
-
-			p->longname = longname;
-			p->long_len = long_len;
-			p->shortname = bufname;
-			p->short_len = i;
-			fill_name = NULL;
-			fill_len = 0;
-		}
-	}
 	if (filldir(dirent, fill_name, fill_len, *furrfu, inum,
 		    (de->attr & ATTR_DIR) ? DT_DIR : DT_REG) < 0)
-		goto FillFailed;
+		goto fill_failed;
 
-RecEnd:
+record_end:
 	furrfu = &lpos;
 	filp->f_pos = cpos;
-	goto GetNew;
-EODir:
+	goto get_new;
+end_of_dir:
 	filp->f_pos = cpos;
-FillFailed:
+fill_failed:
 	brelse(bh);
 	if (unicode)
 		__putname(unicode);
@@ -715,7 +734,7 @@ efault:									   \
 	return -EFAULT;							   \
 }
 
-FAT_IOCTL_FILLDIR_FUNC(fat_ioctl_filldir, dirent)
+FAT_IOCTL_FILLDIR_FUNC(fat_ioctl_filldir, __fat_dirent)
 
 static int fat_ioctl_readdir(struct inode *inode, struct file *filp,
 			     void __user *dirent, filldir_t filldir,
@@ -741,7 +760,7 @@ static int fat_ioctl_readdir(struct inode *inode, struct file *filp,
 static int fat_dir_ioctl(struct inode *inode, struct file *filp,
 			 unsigned int cmd, unsigned long arg)
 {
-	struct dirent __user *d1 = (struct dirent __user *)arg;
+	struct __fat_dirent __user *d1 = (struct __fat_dirent __user *)arg;
 	int short_only, both;
 
 	switch (cmd) {
@@ -757,7 +776,7 @@ static int fat_dir_ioctl(struct inode *inode, struct file *filp,
 		return fat_generic_ioctl(inode, filp, cmd, arg);
 	}
 
-	if (!access_ok(VERIFY_WRITE, d1, sizeof(struct dirent[2])))
+	if (!access_ok(VERIFY_WRITE, d1, sizeof(struct __fat_dirent[2])))
 		return -EFAULT;
 	/*
 	 * Yes, we don't need this put_user() absolutely. However old
@@ -1082,7 +1101,7 @@ int fat_alloc_new_dir(struct inode *dir, struct timespec *ts)
 		goto error_free;
 	}
 
-	fat_date_unix2dos(ts->tv_sec, &time, &date);
+	fat_date_unix2dos(ts->tv_sec, &time, &date, sbi->options.tz_utc);
 
 	de = (struct msdos_dir_entry *)bhs[0]->b_data;
 	/* filling the new directory slots ("." and ".." entries) */
diff --git a/fs/fat/file.c b/fs/fat/file.c
index c672df4036e9..8707a8cfa02c 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -15,6 +15,8 @@
 #include <linux/writeback.h>
 #include <linux/backing-dev.h>
 #include <linux/blkdev.h>
+#include <linux/fsnotify.h>
+#include <linux/security.h>
 
 int fat_generic_ioctl(struct inode *inode, struct file *filp,
 		      unsigned int cmd, unsigned long arg)
@@ -64,6 +66,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
 
 		/* Equivalent to a chmod() */
 		ia.ia_valid = ATTR_MODE | ATTR_CTIME;
+		ia.ia_ctime = current_fs_time(inode->i_sb);
 		if (is_dir) {
 			ia.ia_mode = MSDOS_MKMODE(attr,
 				S_IRWXUGO & ~sbi->options.fs_dmask)
@@ -90,11 +93,21 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
 			}
 		}
 
+		/*
+		 * The security check is questionable...  We single
+		 * out the RO attribute for checking by the security
+		 * module, just because it maps to a file mode.
+		 */
+		err = security_inode_setattr(filp->f_path.dentry, &ia);
+		if (err)
+			goto up;
+
 		/* This MUST be done before doing anything irreversible... */
-		err = notify_change(filp->f_path.dentry, &ia);
+		err = fat_setattr(filp->f_path.dentry, &ia);
 		if (err)
 			goto up;
 
+		fsnotify_change(filp->f_path.dentry, ia.ia_valid);
 		if (sbi->options.sys_immutable) {
 			if (attr & ATTR_SYS)
 				inode->i_flags |= S_IMMUTABLE;
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 46a4508ffd2e..6d266d793e2c 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -382,17 +382,20 @@ static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
 	inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))
 			   & ~((loff_t)sbi->cluster_size - 1)) >> 9;
 	inode->i_mtime.tv_sec =
-		date_dos2unix(le16_to_cpu(de->time), le16_to_cpu(de->date));
+		date_dos2unix(le16_to_cpu(de->time), le16_to_cpu(de->date),
+			      sbi->options.tz_utc);
 	inode->i_mtime.tv_nsec = 0;
 	if (sbi->options.isvfat) {
 		int secs = de->ctime_cs / 100;
 		int csecs = de->ctime_cs % 100;
 		inode->i_ctime.tv_sec  =
 			date_dos2unix(le16_to_cpu(de->ctime),
-				      le16_to_cpu(de->cdate)) + secs;
+				      le16_to_cpu(de->cdate),
+				      sbi->options.tz_utc) + secs;
 		inode->i_ctime.tv_nsec = csecs * 10000000;
 		inode->i_atime.tv_sec =
-			date_dos2unix(0, le16_to_cpu(de->adate));
+			date_dos2unix(0, le16_to_cpu(de->adate),
+				      sbi->options.tz_utc);
 		inode->i_atime.tv_nsec = 0;
 	} else
 		inode->i_ctime = inode->i_atime = inode->i_mtime;
@@ -495,7 +498,7 @@ static void fat_destroy_inode(struct inode *inode)
 	kmem_cache_free(fat_inode_cachep, MSDOS_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct msdos_inode_info *ei = (struct msdos_inode_info *)foo;
 
@@ -591,11 +594,14 @@ retry:
 	raw_entry->attr = fat_attr(inode);
 	raw_entry->start = cpu_to_le16(MSDOS_I(inode)->i_logstart);
 	raw_entry->starthi = cpu_to_le16(MSDOS_I(inode)->i_logstart >> 16);
-	fat_date_unix2dos(inode->i_mtime.tv_sec, &raw_entry->time, &raw_entry->date);
+	fat_date_unix2dos(inode->i_mtime.tv_sec, &raw_entry->time,
+			  &raw_entry->date, sbi->options.tz_utc);
 	if (sbi->options.isvfat) {
 		__le16 atime;
-		fat_date_unix2dos(inode->i_ctime.tv_sec,&raw_entry->ctime,&raw_entry->cdate);
-		fat_date_unix2dos(inode->i_atime.tv_sec,&atime,&raw_entry->adate);
+		fat_date_unix2dos(inode->i_ctime.tv_sec, &raw_entry->ctime,
+				  &raw_entry->cdate, sbi->options.tz_utc);
+		fat_date_unix2dos(inode->i_atime.tv_sec, &atime,
+				  &raw_entry->adate, sbi->options.tz_utc);
 		raw_entry->ctime_cs = (inode->i_ctime.tv_sec & 1) * 100 +
 			inode->i_ctime.tv_nsec / 10000000;
 	}
@@ -836,6 +842,8 @@ static int fat_show_options(struct seq_file *m, struct vfsmount *mnt)
 	}
 	if (sbi->options.flush)
 		seq_puts(m, ",flush");
+	if (opts->tz_utc)
+		seq_puts(m, ",tz=UTC");
 
 	return 0;
 }
@@ -848,7 +856,7 @@ enum {
 	Opt_charset, Opt_shortname_lower, Opt_shortname_win95,
 	Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
 	Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
-	Opt_obsolate, Opt_flush, Opt_err,
+	Opt_obsolate, Opt_flush, Opt_tz_utc, Opt_err,
 };
 
 static match_table_t fat_tokens = {
@@ -883,6 +891,7 @@ static match_table_t fat_tokens = {
 	{Opt_obsolate, "cvf_options=%100s"},
 	{Opt_obsolate, "posix"},
 	{Opt_flush, "flush"},
+	{Opt_tz_utc, "tz=UTC"},
 	{Opt_err, NULL},
 };
 static match_table_t msdos_tokens = {
@@ -947,10 +956,11 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
 	opts->utf8 = opts->unicode_xlate = 0;
 	opts->numtail = 1;
 	opts->usefree = opts->nocase = 0;
+	opts->tz_utc = 0;
 	*debug = 0;
 
 	if (!options)
-		return 0;
+		goto out;
 
 	while ((p = strsep(&options, ",")) != NULL) {
 		int token;
@@ -1036,6 +1046,9 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
 		case Opt_flush:
 			opts->flush = 1;
 			break;
+		case Opt_tz_utc:
+			opts->tz_utc = 1;
+			break;
 
 		/* msdos specific */
 		case Opt_dots:
@@ -1104,10 +1117,13 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
 			return -EINVAL;
 		}
 	}
+
+out:
 	/* UTF-8 doesn't provide FAT semantics */
 	if (!strcmp(opts->iocharset, "utf8")) {
 		printk(KERN_ERR "FAT: utf8 is not a recommended IO charset"
-		       " for FAT filesystems, filesystem will be case sensitive!\n");
+		       " for FAT filesystems, filesystem will be "
+		       "case sensitive!\n");
 	}
 
 	/* If user doesn't specify allow_utime, it's initialized from dmask. */
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 61f23511eacf..79fb98ad36d4 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -142,7 +142,7 @@ static int day_n[] = {
 };
 
 /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
-int date_dos2unix(unsigned short time, unsigned short date)
+int date_dos2unix(unsigned short time, unsigned short date, int tz_utc)
 {
 	int month, year, secs;
 
@@ -156,16 +156,18 @@ int date_dos2unix(unsigned short time, unsigned short date)
 	    ((date & 31)-1+day_n[month]+(year/4)+year*365-((year & 3) == 0 &&
 	    month < 2 ? 1 : 0)+3653);
 			/* days since 1.1.70 plus 80's leap day */
-	secs += sys_tz.tz_minuteswest*60;
+	if (!tz_utc)
+		secs += sys_tz.tz_minuteswest*60;
 	return secs;
 }
 
 /* Convert linear UNIX date to a MS-DOS time/date pair. */
-void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date)
+void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date, int tz_utc)
 {
 	int day, year, nl_day, month;
 
-	unix_date -= sys_tz.tz_minuteswest*60;
+	if (!tz_utc)
+		unix_date -= sys_tz.tz_minuteswest*60;
 
 	/* Jan 1 GMT 00:00:00 1980. But what about another time zone? */
 	if (unix_date < 315532800)
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 330a7d782591..61d625136813 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -64,11 +64,6 @@ static int locate_fd(unsigned int orig_start, int cloexec)
 	struct fdtable *fdt;
 
 	spin_lock(&files->file_lock);
-
-	error = -EINVAL;
-	if (orig_start >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
-		goto out;
-
 repeat:
 	fdt = files_fdtable(files);
 	/*
@@ -83,10 +78,6 @@ repeat:
 	if (start < fdt->max_fds)
 		newfd = find_next_zero_bit(fdt->open_fds->fds_bits,
 					   fdt->max_fds, start);
-	
-	error = -EMFILE;
-	if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
-		goto out;
 
 	error = expand_files(files, newfd);
 	if (error < 0)
@@ -125,27 +116,30 @@ static int dupfd(struct file *file, unsigned int start, int cloexec)
 	return fd;
 }
 
-asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
+asmlinkage long sys_dup3(unsigned int oldfd, unsigned int newfd, int flags)
 {
 	int err = -EBADF;
 	struct file * file, *tofree;
 	struct files_struct * files = current->files;
 	struct fdtable *fdt;
 
+	if ((flags & ~O_CLOEXEC) != 0)
+		return -EINVAL;
+
+	if (unlikely(oldfd == newfd))
+		return -EINVAL;
+
 	spin_lock(&files->file_lock);
 	if (!(file = fcheck(oldfd)))
 		goto out_unlock;
-	err = newfd;
-	if (newfd == oldfd)
-		goto out_unlock;
-	err = -EBADF;
-	if (newfd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
-		goto out_unlock;
 	get_file(file);			/* We are now finished with oldfd */
 
 	err = expand_files(files, newfd);
-	if (err < 0)
+	if (unlikely(err < 0)) {
+		if (err == -EMFILE)
+			err = -EBADF;
 		goto out_fput;
+	}
 
 	/* To avoid races with open() and dup(), we will mark the fd as
 	 * in-use in the open-file bitmap throughout the entire dup2()
@@ -163,7 +157,10 @@ asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
 
 	rcu_assign_pointer(fdt->fd[newfd], file);
 	FD_SET(newfd, fdt->open_fds);
-	FD_CLR(newfd, fdt->close_on_exec);
+	if (flags & O_CLOEXEC)
+		FD_SET(newfd, fdt->close_on_exec);
+	else
+		FD_CLR(newfd, fdt->close_on_exec);
 	spin_unlock(&files->file_lock);
 
 	if (tofree)
@@ -181,6 +178,19 @@ out_fput:
 	goto out;
 }
 
+asmlinkage long sys_dup2(unsigned int oldfd, unsigned int newfd)
+{
+	if (unlikely(newfd == oldfd)) { /* corner case */
+		struct files_struct *files = current->files;
+		rcu_read_lock();
+		if (!fcheck_files(files, oldfd))
+			oldfd = -EBADF;
+		rcu_read_unlock();
+		return oldfd;
+	}
+	return sys_dup3(oldfd, newfd, 0);
+}
+
 asmlinkage long sys_dup(unsigned int fildes)
 {
 	int ret = -EBADF;
@@ -310,6 +320,8 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
 	switch (cmd) {
 	case F_DUPFD:
 	case F_DUPFD_CLOEXEC:
+		if (arg >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
+			break;
 		get_file(filp);
 		err = dupfd(filp, arg, cmd == F_DUPFD_CLOEXEC);
 		break;
diff --git a/fs/fifo.c b/fs/fifo.c
index 9785e36f81e7..987bf9411495 100644
--- a/fs/fifo.c
+++ b/fs/fifo.c
@@ -57,7 +57,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
 	 *  POSIX.1 says that O_NONBLOCK means return with the FIFO
 	 *  opened, even when there is no process writing the FIFO.
 	 */
-		filp->f_op = &read_fifo_fops;
+		filp->f_op = &read_pipefifo_fops;
 		pipe->r_counter++;
 		if (pipe->readers++ == 0)
 			wake_up_partner(inode);
@@ -86,7 +86,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
 		if ((filp->f_flags & O_NONBLOCK) && !pipe->readers)
 			goto err;
 
-		filp->f_op = &write_fifo_fops;
+		filp->f_op = &write_pipefifo_fops;
 		pipe->w_counter++;
 		if (!pipe->writers++)
 			wake_up_partner(inode);
@@ -105,7 +105,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
 	 *  This implementation will NEVER block on a O_RDWR open, since
 	 *  the process can at least talk to itself.
 	 */
-		filp->f_op = &rdwr_fifo_fops;
+		filp->f_op = &rdwr_pipefifo_fops;
 
 		pipe->readers++;
 		pipe->writers++;
@@ -151,5 +151,5 @@ err_nocleanup:
  * depending on the access mode of the file...
  */
 const struct file_operations def_fifo_fops = {
-	.open		= fifo_open,	/* will set read or write pipe_fops */
+	.open		= fifo_open,	/* will set read_ or write_pipefifo_fops */
 };
diff --git a/fs/file.c b/fs/file.c
index 7b3887e054d0..d8773b19fe47 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -250,9 +250,18 @@ int expand_files(struct files_struct *files, int nr)
 	struct fdtable *fdt;
 
 	fdt = files_fdtable(files);
+
+	/*
+	 * N.B. For clone tasks sharing a files structure, this test
+	 * will limit the total number of files that can be opened.
+	 */
+	if (nr >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
+		return -EMFILE;
+
 	/* Do we need to expand? */
 	if (nr < fdt->max_fds)
 		return 0;
+
 	/* Can we expand? */
 	if (nr >= sysctl_nr_open)
 		return -EMFILE;
diff --git a/fs/file_table.c b/fs/file_table.c
index 83084225b4c3..f45a4493f9e7 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -120,7 +120,7 @@ struct file *get_empty_filp(void)
 
 	tsk = current;
 	INIT_LIST_HEAD(&f->f_u.fu_list);
-	atomic_set(&f->f_count, 1);
+	atomic_long_set(&f->f_count, 1);
 	rwlock_init(&f->f_owner.lock);
 	f->f_uid = tsk->fsuid;
 	f->f_gid = tsk->fsgid;
@@ -219,7 +219,7 @@ EXPORT_SYMBOL(init_file);
 
 void fput(struct file *file)
 {
-	if (atomic_dec_and_test(&file->f_count))
+	if (atomic_long_dec_and_test(&file->f_count))
 		__fput(file);
 }
 
@@ -294,7 +294,7 @@ struct file *fget(unsigned int fd)
 	rcu_read_lock();
 	file = fcheck_files(files, fd);
 	if (file) {
-		if (!atomic_inc_not_zero(&file->f_count)) {
+		if (!atomic_long_inc_not_zero(&file->f_count)) {
 			/* File object ref couldn't be taken */
 			rcu_read_unlock();
 			return NULL;
@@ -326,7 +326,7 @@ struct file *fget_light(unsigned int fd, int *fput_needed)
 		rcu_read_lock();
 		file = fcheck_files(files, fd);
 		if (file) {
-			if (atomic_inc_not_zero(&file->f_count))
+			if (atomic_long_inc_not_zero(&file->f_count))
 				*fput_needed = 1;
 			else
 				/* Didn't get the reference, someone's freed */
@@ -341,7 +341,7 @@ struct file *fget_light(unsigned int fd, int *fput_needed)
 
 void put_filp(struct file *file)
 {
-	if (atomic_dec_and_test(&file->f_count)) {
+	if (atomic_long_dec_and_test(&file->f_count)) {
 		security_file_free(file);
 		file_kill(file);
 		file_free(file);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 2060bf06b906..fd03330cadeb 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -97,7 +97,7 @@ void fuse_invalidate_attr(struct inode *inode)
  * timeout is unknown (unlink, rmdir, rename and in some cases
  * lookup)
  */
-static void fuse_invalidate_entry_cache(struct dentry *entry)
+void fuse_invalidate_entry_cache(struct dentry *entry)
 {
 	fuse_dentry_settime(entry, 0);
 }
@@ -112,18 +112,16 @@ static void fuse_invalidate_entry(struct dentry *entry)
 	fuse_invalidate_entry_cache(entry);
 }
 
-static void fuse_lookup_init(struct fuse_req *req, struct inode *dir,
-			     struct dentry *entry,
+static void fuse_lookup_init(struct fuse_conn *fc, struct fuse_req *req,
+			     u64 nodeid, struct qstr *name,
 			     struct fuse_entry_out *outarg)
 {
-	struct fuse_conn *fc = get_fuse_conn(dir);
-
 	memset(outarg, 0, sizeof(struct fuse_entry_out));
 	req->in.h.opcode = FUSE_LOOKUP;
-	req->in.h.nodeid = get_node_id(dir);
+	req->in.h.nodeid = nodeid;
 	req->in.numargs = 1;
-	req->in.args[0].size = entry->d_name.len + 1;
-	req->in.args[0].value = entry->d_name.name;
+	req->in.args[0].size = name->len + 1;
+	req->in.args[0].value = name->name;
 	req->out.numargs = 1;
 	if (fc->minor < 9)
 		req->out.args[0].size = FUSE_COMPAT_ENTRY_OUT_SIZE;
@@ -189,7 +187,8 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
 		attr_version = fuse_get_attr_version(fc);
 
 		parent = dget_parent(entry);
-		fuse_lookup_init(req, parent->d_inode, entry, &outarg);
+		fuse_lookup_init(fc, req, get_node_id(parent->d_inode),
+				 &entry->d_name, &outarg);
 		request_send(fc, req);
 		dput(parent);
 		err = req->out.h.error;
@@ -225,7 +224,7 @@ static int invalid_nodeid(u64 nodeid)
 	return !nodeid || nodeid == FUSE_ROOT_ID;
 }
 
-static struct dentry_operations fuse_dentry_operations = {
+struct dentry_operations fuse_dentry_operations = {
 	.d_revalidate	= fuse_dentry_revalidate,
 };
 
@@ -239,85 +238,127 @@ int fuse_valid_type(int m)
  * Add a directory inode to a dentry, ensuring that no other dentry
  * refers to this inode.  Called with fc->inst_mutex.
  */
-static int fuse_d_add_directory(struct dentry *entry, struct inode *inode)
+static struct dentry *fuse_d_add_directory(struct dentry *entry,
+					   struct inode *inode)
 {
 	struct dentry *alias = d_find_alias(inode);
-	if (alias) {
+	if (alias && !(alias->d_flags & DCACHE_DISCONNECTED)) {
 		/* This tries to shrink the subtree below alias */
 		fuse_invalidate_entry(alias);
 		dput(alias);
 		if (!list_empty(&inode->i_dentry))
-			return -EBUSY;
+			return ERR_PTR(-EBUSY);
+	} else {
+		dput(alias);
 	}
-	d_add(entry, inode);
-	return 0;
+	return d_splice_alias(inode, entry);
 }
 
-static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
-				  struct nameidata *nd)
+int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
+		     struct fuse_entry_out *outarg, struct inode **inode)
 {
-	int err;
-	struct fuse_entry_out outarg;
-	struct inode *inode = NULL;
-	struct fuse_conn *fc = get_fuse_conn(dir);
+	struct fuse_conn *fc = get_fuse_conn_super(sb);
 	struct fuse_req *req;
 	struct fuse_req *forget_req;
 	u64 attr_version;
+	int err;
 
-	if (entry->d_name.len > FUSE_NAME_MAX)
-		return ERR_PTR(-ENAMETOOLONG);
+	*inode = NULL;
+	err = -ENAMETOOLONG;
+	if (name->len > FUSE_NAME_MAX)
+		goto out;
 
 	req = fuse_get_req(fc);
+	err = PTR_ERR(req);
 	if (IS_ERR(req))
-		return ERR_CAST(req);
+		goto out;
 
 	forget_req = fuse_get_req(fc);
+	err = PTR_ERR(forget_req);
 	if (IS_ERR(forget_req)) {
 		fuse_put_request(fc, req);
-		return ERR_CAST(forget_req);
+		goto out;
 	}
 
 	attr_version = fuse_get_attr_version(fc);
 
-	fuse_lookup_init(req, dir, entry, &outarg);
+	fuse_lookup_init(fc, req, nodeid, name, outarg);
 	request_send(fc, req);
 	err = req->out.h.error;
 	fuse_put_request(fc, req);
 	/* Zero nodeid is same as -ENOENT, but with valid timeout */
-	if (!err && outarg.nodeid &&
-	    (invalid_nodeid(outarg.nodeid) ||
-	     !fuse_valid_type(outarg.attr.mode)))
-		err = -EIO;
-	if (!err && outarg.nodeid) {
-		inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
-				  &outarg.attr, entry_attr_timeout(&outarg),
-				  attr_version);
-		if (!inode) {
-			fuse_send_forget(fc, forget_req, outarg.nodeid, 1);
-			return ERR_PTR(-ENOMEM);
-		}
+	if (err || !outarg->nodeid)
+		goto out_put_forget;
+
+	err = -EIO;
+	if (!outarg->nodeid)
+		goto out_put_forget;
+	if (!fuse_valid_type(outarg->attr.mode))
+		goto out_put_forget;
+
+	*inode = fuse_iget(sb, outarg->nodeid, outarg->generation,
+			   &outarg->attr, entry_attr_timeout(outarg),
+			   attr_version);
+	err = -ENOMEM;
+	if (!*inode) {
+		fuse_send_forget(fc, forget_req, outarg->nodeid, 1);
+		goto out;
 	}
+	err = 0;
+
+ out_put_forget:
 	fuse_put_request(fc, forget_req);
-	if (err && err != -ENOENT)
-		return ERR_PTR(err);
+ out:
+	return err;
+}
+
+static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
+				  struct nameidata *nd)
+{
+	int err;
+	struct fuse_entry_out outarg;
+	struct inode *inode;
+	struct dentry *newent;
+	struct fuse_conn *fc = get_fuse_conn(dir);
+	bool outarg_valid = true;
+
+	err = fuse_lookup_name(dir->i_sb, get_node_id(dir), &entry->d_name,
+			       &outarg, &inode);
+	if (err == -ENOENT) {
+		outarg_valid = false;
+		err = 0;
+	}
+	if (err)
+		goto out_err;
+
+	err = -EIO;
+	if (inode && get_node_id(inode) == FUSE_ROOT_ID)
+		goto out_iput;
 
 	if (inode && S_ISDIR(inode->i_mode)) {
 		mutex_lock(&fc->inst_mutex);
-		err = fuse_d_add_directory(entry, inode);
+		newent = fuse_d_add_directory(entry, inode);
 		mutex_unlock(&fc->inst_mutex);
-		if (err) {
-			iput(inode);
-			return ERR_PTR(err);
-		}
-	} else
-		d_add(entry, inode);
+		err = PTR_ERR(newent);
+		if (IS_ERR(newent))
+			goto out_iput;
+	} else {
+		newent = d_splice_alias(inode, entry);
+	}
 
+	entry = newent ? newent : entry;
 	entry->d_op = &fuse_dentry_operations;
-	if (!err)
+	if (outarg_valid)
 		fuse_change_entry_timeout(entry, &outarg);
 	else
 		fuse_invalidate_entry_cache(entry);
-	return NULL;
+
+	return newent;
+
+ out_iput:
+	iput(inode);
+ out_err:
+	return ERR_PTR(err);
 }
 
 /*
@@ -857,7 +898,7 @@ static int fuse_access(struct inode *inode, int mask)
 		return PTR_ERR(req);
 
 	memset(&inarg, 0, sizeof(inarg));
-	inarg.mask = mask;
+	inarg.mask = mask & (MAY_READ | MAY_WRITE | MAY_EXEC);
 	req->in.h.opcode = FUSE_ACCESS;
 	req->in.h.nodeid = get_node_id(inode);
 	req->in.numargs = 1;
@@ -886,7 +927,7 @@ static int fuse_access(struct inode *inode, int mask)
  * access request is sent.  Execute permission is still checked
  * locally based on file mode.
  */
-static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int fuse_permission(struct inode *inode, int mask)
 {
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	bool refreshed = false;
@@ -921,7 +962,7 @@ static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
 		   exist.  So if permissions are revoked this won't be
 		   noticed immediately, only after the attribute
 		   timeout has expired */
-	} else if (nd && (nd->flags & (LOOKUP_ACCESS | LOOKUP_CHDIR))) {
+	} else if (mask & MAY_ACCESS) {
 		err = fuse_access(inode, mask);
 	} else if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
 		if (!(inode->i_mode & S_IXUGO)) {
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 8092f0d9fd1f..2bada6bbc317 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -893,7 +893,7 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 	if (count == 0)
 		goto out;
 
-	err = remove_suid(file->f_path.dentry);
+	err = file_remove_suid(file);
 	if (err)
 		goto out;
 
@@ -1341,6 +1341,11 @@ static int fuse_setlk(struct file *file, struct file_lock *fl, int flock)
 	pid_t pid = fl->fl_type != F_UNLCK ? current->tgid : 0;
 	int err;
 
+	if (fl->fl_lmops && fl->fl_lmops->fl_grant) {
+		/* NLM needs asynchronous locks, which we don't support yet */
+		return -ENOLCK;
+	}
+
 	/* Unlock on close is handled by the flush method */
 	if (fl->fl_flags & FL_CLOSE)
 		return 0;
@@ -1365,7 +1370,9 @@ static int fuse_file_lock(struct file *file, int cmd, struct file_lock *fl)
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	int err;
 
-	if (cmd == F_GETLK) {
+	if (cmd == F_CANCELLK) {
+		err = 0;
+	} else if (cmd == F_GETLK) {
 		if (fc->no_lock) {
 			posix_test_lock(file, fl);
 			err = 0;
@@ -1373,7 +1380,7 @@ static int fuse_file_lock(struct file *file, int cmd, struct file_lock *fl)
 			err = fuse_getlk(file, fl);
 	} else {
 		if (fc->no_lock)
-			err = posix_lock_file_wait(file, fl);
+			err = posix_lock_file(file, fl, NULL);
 		else
 			err = fuse_setlk(file, fl, 0);
 	}
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index bae948657c4f..3a876076bdd1 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -363,6 +363,9 @@ struct fuse_conn {
 	/** Do not send separate SETATTR request before open(O_TRUNC)  */
 	unsigned atomic_o_trunc : 1;
 
+	/** Filesystem supports NFS exporting.  Only set in INIT */
+	unsigned export_support : 1;
+
 	/*
 	 * The following bitfields are only for optimization purposes
 	 * and hence races in setting them will not cause malfunction
@@ -464,6 +467,8 @@ static inline u64 get_node_id(struct inode *inode)
 /** Device operations */
 extern const struct file_operations fuse_dev_operations;
 
+extern struct dentry_operations fuse_dentry_operations;
+
 /**
  * Get a filled in inode
  */
@@ -471,6 +476,9 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
 			int generation, struct fuse_attr *attr,
 			u64 attr_valid, u64 attr_version);
 
+int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
+		     struct fuse_entry_out *outarg, struct inode **inode);
+
 /**
  * Send FORGET command
  */
@@ -604,6 +612,8 @@ void fuse_abort_conn(struct fuse_conn *fc);
  */
 void fuse_invalidate_attr(struct inode *inode);
 
+void fuse_invalidate_entry_cache(struct dentry *entry);
+
 /**
  * Acquire reference to fuse_conn
  */
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 3141690558c8..d2249f174e20 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -18,6 +18,7 @@
 #include <linux/statfs.h>
 #include <linux/random.h>
 #include <linux/sched.h>
+#include <linux/exportfs.h>
 
 MODULE_AUTHOR("Miklos Szeredi <miklos@szeredi.hu>");
 MODULE_DESCRIPTION("Filesystem in Userspace");
@@ -552,6 +553,174 @@ static struct inode *get_root_inode(struct super_block *sb, unsigned mode)
 	return fuse_iget(sb, 1, 0, &attr, 0, 0);
 }
 
+struct fuse_inode_handle
+{
+	u64 nodeid;
+	u32 generation;
+};
+
+static struct dentry *fuse_get_dentry(struct super_block *sb,
+				      struct fuse_inode_handle *handle)
+{
+	struct fuse_conn *fc = get_fuse_conn_super(sb);
+	struct inode *inode;
+	struct dentry *entry;
+	int err = -ESTALE;
+
+	if (handle->nodeid == 0)
+		goto out_err;
+
+	inode = ilookup5(sb, handle->nodeid, fuse_inode_eq, &handle->nodeid);
+	if (!inode) {
+		struct fuse_entry_out outarg;
+		struct qstr name;
+
+		if (!fc->export_support)
+			goto out_err;
+
+		name.len = 1;
+		name.name = ".";
+		err = fuse_lookup_name(sb, handle->nodeid, &name, &outarg,
+				       &inode);
+		if (err && err != -ENOENT)
+			goto out_err;
+		if (err || !inode) {
+			err = -ESTALE;
+			goto out_err;
+		}
+		err = -EIO;
+		if (get_node_id(inode) != handle->nodeid)
+			goto out_iput;
+	}
+	err = -ESTALE;
+	if (inode->i_generation != handle->generation)
+		goto out_iput;
+
+	entry = d_alloc_anon(inode);
+	err = -ENOMEM;
+	if (!entry)
+		goto out_iput;
+
+	if (get_node_id(inode) != FUSE_ROOT_ID) {
+		entry->d_op = &fuse_dentry_operations;
+		fuse_invalidate_entry_cache(entry);
+	}
+
+	return entry;
+
+ out_iput:
+	iput(inode);
+ out_err:
+	return ERR_PTR(err);
+}
+
+static int fuse_encode_fh(struct dentry *dentry, u32 *fh, int *max_len,
+			   int connectable)
+{
+	struct inode *inode = dentry->d_inode;
+	bool encode_parent = connectable && !S_ISDIR(inode->i_mode);
+	int len = encode_parent ? 6 : 3;
+	u64 nodeid;
+	u32 generation;
+
+	if (*max_len < len)
+		return  255;
+
+	nodeid = get_fuse_inode(inode)->nodeid;
+	generation = inode->i_generation;
+
+	fh[0] = (u32)(nodeid >> 32);
+	fh[1] = (u32)(nodeid & 0xffffffff);
+	fh[2] = generation;
+
+	if (encode_parent) {
+		struct inode *parent;
+
+		spin_lock(&dentry->d_lock);
+		parent = dentry->d_parent->d_inode;
+		nodeid = get_fuse_inode(parent)->nodeid;
+		generation = parent->i_generation;
+		spin_unlock(&dentry->d_lock);
+
+		fh[3] = (u32)(nodeid >> 32);
+		fh[4] = (u32)(nodeid & 0xffffffff);
+		fh[5] = generation;
+	}
+
+	*max_len = len;
+	return encode_parent ? 0x82 : 0x81;
+}
+
+static struct dentry *fuse_fh_to_dentry(struct super_block *sb,
+		struct fid *fid, int fh_len, int fh_type)
+{
+	struct fuse_inode_handle handle;
+
+	if ((fh_type != 0x81 && fh_type != 0x82) || fh_len < 3)
+		return NULL;
+
+	handle.nodeid = (u64) fid->raw[0] << 32;
+	handle.nodeid |= (u64) fid->raw[1];
+	handle.generation = fid->raw[2];
+	return fuse_get_dentry(sb, &handle);
+}
+
+static struct dentry *fuse_fh_to_parent(struct super_block *sb,
+		struct fid *fid, int fh_len, int fh_type)
+{
+	struct fuse_inode_handle parent;
+
+	if (fh_type != 0x82 || fh_len < 6)
+		return NULL;
+
+	parent.nodeid = (u64) fid->raw[3] << 32;
+	parent.nodeid |= (u64) fid->raw[4];
+	parent.generation = fid->raw[5];
+	return fuse_get_dentry(sb, &parent);
+}
+
+static struct dentry *fuse_get_parent(struct dentry *child)
+{
+	struct inode *child_inode = child->d_inode;
+	struct fuse_conn *fc = get_fuse_conn(child_inode);
+	struct inode *inode;
+	struct dentry *parent;
+	struct fuse_entry_out outarg;
+	struct qstr name;
+	int err;
+
+	if (!fc->export_support)
+		return ERR_PTR(-ESTALE);
+
+	name.len = 2;
+	name.name = "..";
+	err = fuse_lookup_name(child_inode->i_sb, get_node_id(child_inode),
+			       &name, &outarg, &inode);
+	if (err && err != -ENOENT)
+		return ERR_PTR(err);
+	if (err || !inode)
+		return ERR_PTR(-ESTALE);
+
+	parent = d_alloc_anon(inode);
+	if (!parent) {
+		iput(inode);
+		return ERR_PTR(-ENOMEM);
+	}
+	if (get_node_id(inode) != FUSE_ROOT_ID) {
+		parent->d_op = &fuse_dentry_operations;
+		fuse_invalidate_entry_cache(parent);
+	}
+
+	return parent;
+}
+
+static const struct export_operations fuse_export_operations = {
+	.fh_to_dentry	= fuse_fh_to_dentry,
+	.fh_to_parent	= fuse_fh_to_parent,
+	.encode_fh	= fuse_encode_fh,
+	.get_parent	= fuse_get_parent,
+};
+
 static const struct super_operations fuse_super_operations = {
 	.alloc_inode    = fuse_alloc_inode,
 	.destroy_inode  = fuse_destroy_inode,
@@ -581,6 +750,11 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
 				fc->no_lock = 1;
 			if (arg->flags & FUSE_ATOMIC_O_TRUNC)
 				fc->atomic_o_trunc = 1;
+			if (arg->minor >= 9) {
+				/* LOOKUP has dependency on proto version */
+				if (arg->flags & FUSE_EXPORT_SUPPORT)
+					fc->export_support = 1;
+			}
 			if (arg->flags & FUSE_BIG_WRITES)
 				fc->big_writes = 1;
 		} else {
@@ -607,7 +781,7 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
 	arg->minor = FUSE_KERNEL_MINOR_VERSION;
 	arg->max_readahead = fc->bdi.ra_pages * PAGE_CACHE_SIZE;
 	arg->flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC |
-		FUSE_BIG_WRITES;
+		FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES;
 	req->in.h.opcode = FUSE_INIT;
 	req->in.numargs = 1;
 	req->in.args[0].size = sizeof(*arg);
@@ -652,6 +826,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_magic = FUSE_SUPER_MAGIC;
 	sb->s_op = &fuse_super_operations;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
+	sb->s_export_op = &fuse_export_operations;
 
 	file = fget(d.fd);
 	if (!file)
@@ -781,7 +956,7 @@ static inline void unregister_fuseblk(void)
 }
 #endif
 
-static void fuse_inode_init_once(struct kmem_cache *cachep, void *foo)
+static void fuse_inode_init_once(void *foo)
 {
 	struct inode * inode = foo;
 
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 6da0ab355b8a..8b0806a32948 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -448,7 +448,7 @@ struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
 	struct qstr qstr;
 	struct inode *inode;
 	gfs2_str2qstr(&qstr, name);
-	inode = gfs2_lookupi(dip, &qstr, 1, NULL);
+	inode = gfs2_lookupi(dip, &qstr, 1);
 	/* gfs2_lookupi has inconsistent callers: vfs
 	 * related routines expect NULL for no entry found,
 	 * gfs2_lookup_simple callers expect ENOENT
@@ -477,7 +477,7 @@ struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
  */
 
 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
-			   int is_root, struct nameidata *nd)
+			   int is_root)
 {
 	struct super_block *sb = dir->i_sb;
 	struct gfs2_inode *dip = GFS2_I(dir);
@@ -1173,7 +1173,7 @@ int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
 			break;
 		}
 
-		tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
+		tmp = gfs2_lookupi(dir, &dotdot, 1);
 		if (IS_ERR(tmp)) {
 			error = PTR_ERR(tmp);
 			break;
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index 6074c2506f75..58f9607d6a86 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -83,7 +83,7 @@ int gfs2_inode_refresh(struct gfs2_inode *ip);
 int gfs2_dinode_dealloc(struct gfs2_inode *inode);
 int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
-			   int is_root, struct nameidata *nd);
+			   int is_root);
 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 			   unsigned int mode, dev_t dev);
 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index bcc668d0fadd..bb2cc303ac29 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -24,7 +24,7 @@
 #include "util.h"
 #include "glock.h"
 
-static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
+static void gfs2_init_inode_once(void *foo)
 {
 	struct gfs2_inode *ip = foo;
 
@@ -33,7 +33,7 @@ static void gfs2_init_inode_once(struct kmem_cache *cachep, void *foo)
 	ip->i_alloc = NULL;
 }
 
-static void gfs2_init_glock_once(struct kmem_cache *cachep, void *foo)
+static void gfs2_init_glock_once(void *foo)
 {
 	struct gfs2_glock *gl = foo;
 
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index 990d9f4bc463..9cda8536530c 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -134,7 +134,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
 	struct dentry *dentry;
 
 	gfs2_str2qstr(&dotdot, "..");
-	inode = gfs2_lookupi(child->d_inode, &dotdot, 1, NULL);
+	inode = gfs2_lookupi(child->d_inode, &dotdot, 1);
 
 	if (!inode)
 		return ERR_PTR(-ENOENT);
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 1e252dfc5294..e2c62f73a778 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -74,7 +74,7 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry,
 			return PTR_ERR(inode);
 		}
 
-		inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
+		inode = gfs2_lookupi(dir, &dentry->d_name, 0);
 		if (inode) {
 			if (!IS_ERR(inode)) {
 				gfs2_holder_uninit(ghs);
@@ -109,7 +109,7 @@ static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
 
 	dentry->d_op = &gfs2_dops;
 
-	inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
+	inode = gfs2_lookupi(dir, &dentry->d_name, 0);
 	if (inode && IS_ERR(inode))
 		return ERR_CAST(inode);
 
@@ -915,12 +915,6 @@ int gfs2_permission(struct inode *inode, int mask)
 	return error;
 }
 
-static int gfs2_iop_permission(struct inode *inode, int mask,
-			       struct nameidata *nd)
-{
-	return gfs2_permission(inode, mask);
-}
-
 static int setattr_size(struct inode *inode, struct iattr *attr)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
@@ -1150,7 +1144,7 @@ static int gfs2_removexattr(struct dentry *dentry, const char *name)
 }
 
 const struct inode_operations gfs2_file_iops = {
-	.permission = gfs2_iop_permission,
+	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
 	.setxattr = gfs2_setxattr,
@@ -1169,7 +1163,7 @@ const struct inode_operations gfs2_dir_iops = {
 	.rmdir = gfs2_rmdir,
 	.mknod = gfs2_mknod,
 	.rename = gfs2_rename,
-	.permission = gfs2_iop_permission,
+	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
 	.setxattr = gfs2_setxattr,
@@ -1181,7 +1175,7 @@ const struct inode_operations gfs2_dir_iops = {
 const struct inode_operations gfs2_symlink_iops = {
 	.readlink = gfs2_readlink,
 	.follow_link = gfs2_follow_link,
-	.permission = gfs2_iop_permission,
+	.permission = gfs2_permission,
 	.setattr = gfs2_setattr,
 	.getattr = gfs2_getattr,
 	.setxattr = gfs2_setxattr,
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 63a8a902d9db..ca831991cbc2 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -389,7 +389,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
 			break;
 
 		INIT_LIST_HEAD(&jd->extent_list);
-		jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1, NULL);
+		jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
 		if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
 			if (!jd->jd_inode)
 				error = -ENOENT;
diff --git a/fs/hfs/bitmap.c b/fs/hfs/bitmap.c
index 24e75798ddf0..c6e97366e8ac 100644
--- a/fs/hfs/bitmap.c
+++ b/fs/hfs/bitmap.c
@@ -145,7 +145,7 @@ u32 hfs_vbm_search_free(struct super_block *sb, u32 goal, u32 *num_bits)
 	if (!*num_bits)
 		return 0;
 
-	down(&HFS_SB(sb)->bitmap_lock);
+	mutex_lock(&HFS_SB(sb)->bitmap_lock);
 	bitmap = HFS_SB(sb)->bitmap;
 
 	pos = hfs_find_set_zero_bits(bitmap, HFS_SB(sb)->fs_ablocks, goal, num_bits);
@@ -162,7 +162,7 @@ u32 hfs_vbm_search_free(struct super_block *sb, u32 goal, u32 *num_bits)
 	HFS_SB(sb)->free_ablocks -= *num_bits;
 	hfs_bitmap_dirty(sb);
 out:
-	up(&HFS_SB(sb)->bitmap_lock);
+	mutex_unlock(&HFS_SB(sb)->bitmap_lock);
 	return pos;
 }
 
@@ -205,7 +205,7 @@ int hfs_clear_vbm_bits(struct super_block *sb, u16 start, u16 count)
 	if ((start + count) > HFS_SB(sb)->fs_ablocks)
 		return -2;
 
-	down(&HFS_SB(sb)->bitmap_lock);
+	mutex_lock(&HFS_SB(sb)->bitmap_lock);
 	/* bitmap is always on a 32-bit boundary */
 	curr = HFS_SB(sb)->bitmap + (start / 32);
 	len = count;
@@ -236,7 +236,7 @@ int hfs_clear_vbm_bits(struct super_block *sb, u16 start, u16 count)
 	}
 out:
 	HFS_SB(sb)->free_ablocks += len;
-	up(&HFS_SB(sb)->bitmap_lock);
+	mutex_unlock(&HFS_SB(sb)->bitmap_lock);
 	hfs_bitmap_dirty(sb);
 
 	return 0;
diff --git a/fs/hfs/btree.c b/fs/hfs/btree.c
index f6621a785202..9b9d6395bad3 100644
--- a/fs/hfs/btree.c
+++ b/fs/hfs/btree.c
@@ -40,7 +40,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke
 	{
 	struct hfs_mdb *mdb = HFS_SB(sb)->mdb;
 	HFS_I(tree->inode)->flags = 0;
-	init_MUTEX(&HFS_I(tree->inode)->extents_lock);
+	mutex_init(&HFS_I(tree->inode)->extents_lock);
 	switch (id) {
 	case HFS_EXT_CNID:
 		hfs_inode_read_fork(tree->inode, mdb->drXTExtRec, mdb->drXTFlSize,
diff --git a/fs/hfs/extent.c b/fs/hfs/extent.c
index c176f67ba0a5..2c16316d2917 100644
--- a/fs/hfs/extent.c
+++ b/fs/hfs/extent.c
@@ -343,16 +343,16 @@ int hfs_get_block(struct inode *inode, sector_t block,
 		goto done;
 	}
 
-	down(&HFS_I(inode)->extents_lock);
+	mutex_lock(&HFS_I(inode)->extents_lock);
 	res = hfs_ext_read_extent(inode, ablock);
 	if (!res)
 		dblock = hfs_ext_find_block(HFS_I(inode)->cached_extents,
 					    ablock - HFS_I(inode)->cached_start);
 	else {
-		up(&HFS_I(inode)->extents_lock);
+		mutex_unlock(&HFS_I(inode)->extents_lock);
 		return -EIO;
 	}
-	up(&HFS_I(inode)->extents_lock);
+	mutex_unlock(&HFS_I(inode)->extents_lock);
 
 done:
 	map_bh(bh_result, sb, HFS_SB(sb)->fs_start +
@@ -375,7 +375,7 @@ int hfs_extend_file(struct inode *inode)
 	u32 start, len, goal;
 	int res;
 
-	down(&HFS_I(inode)->extents_lock);
+	mutex_lock(&HFS_I(inode)->extents_lock);
 	if (HFS_I(inode)->alloc_blocks == HFS_I(inode)->first_blocks)
 		goal = hfs_ext_lastblock(HFS_I(inode)->first_extents);
 	else {
@@ -425,7 +425,7 @@ int hfs_extend_file(struct inode *inode)
 			goto insert_extent;
 	}
 out:
-	up(&HFS_I(inode)->extents_lock);
+	mutex_unlock(&HFS_I(inode)->extents_lock);
 	if (!res) {
 		HFS_I(inode)->alloc_blocks += len;
 		mark_inode_dirty(inode);
@@ -487,7 +487,7 @@ void hfs_file_truncate(struct inode *inode)
 	if (blk_cnt == alloc_cnt)
 		goto out;
 
-	down(&HFS_I(inode)->extents_lock);
+	mutex_lock(&HFS_I(inode)->extents_lock);
 	hfs_find_init(HFS_SB(sb)->ext_tree, &fd);
 	while (1) {
 		if (alloc_cnt == HFS_I(inode)->first_blocks) {
@@ -514,7 +514,7 @@ void hfs_file_truncate(struct inode *inode)
 		hfs_brec_remove(&fd);
 	}
 	hfs_find_exit(&fd);
-	up(&HFS_I(inode)->extents_lock);
+	mutex_unlock(&HFS_I(inode)->extents_lock);
 
 	HFS_I(inode)->alloc_blocks = blk_cnt;
 out:
diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h
index 147374b6f675..9955232fdf8c 100644
--- a/fs/hfs/hfs_fs.h
+++ b/fs/hfs/hfs_fs.h
@@ -11,6 +11,7 @@
 
 #include <linux/slab.h>
 #include <linux/types.h>
+#include <linux/mutex.h>
 #include <linux/buffer_head.h>
 #include <linux/fs.h>
 
@@ -53,7 +54,7 @@ struct hfs_inode_info {
 	struct list_head open_dir_list;
 	struct inode *rsrc_inode;
 
-	struct semaphore extents_lock;
+	struct mutex extents_lock;
 
 	u16 alloc_blocks, clump_blocks;
 	sector_t fs_blocks;
@@ -139,7 +140,7 @@ struct hfs_sb_info {
 
 	struct nls_table *nls_io, *nls_disk;
 
-	struct semaphore bitmap_lock;
+	struct mutex bitmap_lock;
 
 	unsigned long flags;
 
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 97f8446c4ff4..7e19835efa2e 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -150,7 +150,7 @@ struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, int mode)
 	if (!inode)
 		return NULL;
 
-	init_MUTEX(&HFS_I(inode)->extents_lock);
+	mutex_init(&HFS_I(inode)->extents_lock);
 	INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
 	hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name);
 	inode->i_ino = HFS_SB(sb)->next_id++;
@@ -281,7 +281,7 @@ static int hfs_read_inode(struct inode *inode, void *data)
 
 	HFS_I(inode)->flags = 0;
 	HFS_I(inode)->rsrc_inode = NULL;
-	init_MUTEX(&HFS_I(inode)->extents_lock);
+	mutex_init(&HFS_I(inode)->extents_lock);
 	INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
 
 	/* Initialize the inode */
@@ -511,8 +511,7 @@ void hfs_clear_inode(struct inode *inode)
 	}
 }
 
-static int hfs_permission(struct inode *inode, int mask,
-			  struct nameidata *nd)
+static int hfs_permission(struct inode *inode, int mask)
 {
 	if (S_ISREG(inode->i_mode) && mask & MAY_EXEC)
 		return 0;
@@ -523,8 +522,6 @@ static int hfs_file_open(struct inode *inode, struct file *file)
 {
 	if (HFS_IS_RSRC(inode))
 		inode = HFS_I(inode)->rsrc_inode;
-	if (atomic_read(&file->f_count) != 1)
-		return 0;
 	atomic_inc(&HFS_I(inode)->opencnt);
 	return 0;
 }
@@ -535,8 +532,6 @@ static int hfs_file_release(struct inode *inode, struct file *file)
 
 	if (HFS_IS_RSRC(inode))
 		inode = HFS_I(inode)->rsrc_inode;
-	if (atomic_read(&file->f_count) != 0)
-		return 0;
 	if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) {
 		mutex_lock(&inode->i_mutex);
 		hfs_file_truncate(inode);
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index 8cf67974adf6..4abb1047c689 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -372,7 +372,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
 
 	sb->s_op = &hfs_super_operations;
 	sb->s_flags |= MS_NODIRATIME;
-	init_MUTEX(&sbi->bitmap_lock);
+	mutex_init(&sbi->bitmap_lock);
 
 	res = hfs_mdb_get(sb);
 	if (res) {
@@ -432,7 +432,7 @@ static struct file_system_type hfs_fs_type = {
 	.fs_flags	= FS_REQUIRES_DEV,
 };
 
-static void hfs_init_once(struct kmem_cache *cachep, void *p)
+static void hfs_init_once(void *p)
 {
 	struct hfs_inode_info *i = p;
 
diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c
index 12e899cd7886..fec8f61227ff 100644
--- a/fs/hfsplus/extents.c
+++ b/fs/hfsplus/extents.c
@@ -199,16 +199,16 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock,
 		goto done;
 	}
 
-	down(&HFSPLUS_I(inode).extents_lock);
+	mutex_lock(&HFSPLUS_I(inode).extents_lock);
 	res = hfsplus_ext_read_extent(inode, ablock);
 	if (!res) {
 		dblock = hfsplus_ext_find_block(HFSPLUS_I(inode).cached_extents, ablock -
 					     HFSPLUS_I(inode).cached_start);
 	} else {
-		up(&HFSPLUS_I(inode).extents_lock);
+		mutex_unlock(&HFSPLUS_I(inode).extents_lock);
 		return -EIO;
 	}
-	up(&HFSPLUS_I(inode).extents_lock);
+	mutex_unlock(&HFSPLUS_I(inode).extents_lock);
 
 done:
 	dprint(DBG_EXTENT, "get_block(%lu): %llu - %u\n", inode->i_ino, (long long)iblock, dblock);
@@ -355,7 +355,7 @@ int hfsplus_file_extend(struct inode *inode)
 		return -ENOSPC;
 	}
 
-	down(&HFSPLUS_I(inode).extents_lock);
+	mutex_lock(&HFSPLUS_I(inode).extents_lock);
 	if (HFSPLUS_I(inode).alloc_blocks == HFSPLUS_I(inode).first_blocks)
 		goal = hfsplus_ext_lastblock(HFSPLUS_I(inode).first_extents);
 	else {
@@ -408,7 +408,7 @@ int hfsplus_file_extend(struct inode *inode)
 			goto insert_extent;
 	}
 out:
-	up(&HFSPLUS_I(inode).extents_lock);
+	mutex_unlock(&HFSPLUS_I(inode).extents_lock);
 	if (!res) {
 		HFSPLUS_I(inode).alloc_blocks += len;
 		mark_inode_dirty(inode);
@@ -465,7 +465,7 @@ void hfsplus_file_truncate(struct inode *inode)
 	if (blk_cnt == alloc_cnt)
 		goto out;
 
-	down(&HFSPLUS_I(inode).extents_lock);
+	mutex_lock(&HFSPLUS_I(inode).extents_lock);
 	hfs_find_init(HFSPLUS_SB(sb).ext_tree, &fd);
 	while (1) {
 		if (alloc_cnt == HFSPLUS_I(inode).first_blocks) {
@@ -492,7 +492,7 @@ void hfsplus_file_truncate(struct inode *inode)
 		hfs_brec_remove(&fd);
 	}
 	hfs_find_exit(&fd);
-	up(&HFSPLUS_I(inode).extents_lock);
+	mutex_unlock(&HFSPLUS_I(inode).extents_lock);
 
 	HFSPLUS_I(inode).alloc_blocks = blk_cnt;
 out:
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index 9e59537b43d5..f027a905225f 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -11,6 +11,7 @@
 #define _LINUX_HFSPLUS_FS_H
 
 #include <linux/fs.h>
+#include <linux/mutex.h>
 #include <linux/buffer_head.h>
 #include "hfsplus_raw.h"
 
@@ -154,7 +155,7 @@ struct hfsplus_sb_info {
 
 
 struct hfsplus_inode_info {
-	struct semaphore extents_lock;
+	struct mutex extents_lock;
 	u32 clump_blocks, alloc_blocks;
 	sector_t fs_blocks;
 	/* Allocation extents from catalog record or volume header */
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 67e1c8b467c4..b085d64a2b67 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -163,7 +163,7 @@ static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dent
 
 	inode->i_ino = dir->i_ino;
 	INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
-	init_MUTEX(&HFSPLUS_I(inode).extents_lock);
+	mutex_init(&HFSPLUS_I(inode).extents_lock);
 	HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC;
 
 	hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
@@ -238,7 +238,7 @@ static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
 	perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev);
 }
 
-static int hfsplus_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int hfsplus_permission(struct inode *inode, int mask)
 {
 	/* MAY_EXEC is also used for lookup, if no x bit is set allow lookup,
 	 * open_exec has the same test, so it's still not executable, if a x bit
@@ -254,8 +254,6 @@ static int hfsplus_file_open(struct inode *inode, struct file *file)
 {
 	if (HFSPLUS_IS_RSRC(inode))
 		inode = HFSPLUS_I(inode).rsrc_inode;
-	if (atomic_read(&file->f_count) != 1)
-		return 0;
 	atomic_inc(&HFSPLUS_I(inode).opencnt);
 	return 0;
 }
@@ -266,8 +264,6 @@ static int hfsplus_file_release(struct inode *inode, struct file *file)
 
 	if (HFSPLUS_IS_RSRC(inode))
 		inode = HFSPLUS_I(inode).rsrc_inode;
-	if (atomic_read(&file->f_count) != 0)
-		return 0;
 	if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
 		mutex_lock(&inode->i_mutex);
 		hfsplus_file_truncate(inode);
@@ -316,7 +312,7 @@ struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
 	inode->i_nlink = 1;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
 	INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
-	init_MUTEX(&HFSPLUS_I(inode).extents_lock);
+	mutex_init(&HFSPLUS_I(inode).extents_lock);
 	atomic_set(&HFSPLUS_I(inode).opencnt, 0);
 	HFSPLUS_I(inode).flags = 0;
 	memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec));
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index ce97a54518d8..e834e578c93f 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -34,7 +34,7 @@ struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
 		return inode;
 
 	INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
-	init_MUTEX(&HFSPLUS_I(inode).extents_lock);
+	mutex_init(&HFSPLUS_I(inode).extents_lock);
 	HFSPLUS_I(inode).flags = 0;
 	HFSPLUS_I(inode).rsrc_inode = NULL;
 	atomic_set(&HFSPLUS_I(inode).opencnt, 0);
@@ -485,7 +485,7 @@ static struct file_system_type hfsplus_fs_type = {
 	.fs_flags	= FS_REQUIRES_DEV,
 };
 
-static void hfsplus_init_once(struct kmem_cache *cachep, void *p)
+static void hfsplus_init_once(void *p)
 {
 	struct hfsplus_inode_info *i = p;
 
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 5222345ddccf..d6ecabf4d231 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -822,7 +822,7 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
 	return err;
 }
 
-int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
+int hostfs_permission(struct inode *ino, int desired)
 {
 	char *name;
 	int r = 0, w = 0, x = 0, err;
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index d256559b4104..d9c59a775449 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -415,7 +415,7 @@ again:
 		d_drop(dentry);
 		spin_lock(&dentry->d_lock);
 		if (atomic_read(&dentry->d_count) > 1 ||
-		    permission(inode, MAY_WRITE, NULL) ||
+		    generic_permission(inode, MAY_WRITE, NULL) ||
 		    !S_ISREG(inode->i_mode) ||
 		    get_write_access(inode)) {
 			spin_unlock(&dentry->d_lock);
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f63a699ec659..b8ae9c90ada0 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -173,7 +173,7 @@ static void hpfs_destroy_inode(struct inode *inode)
 	kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
 
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 65077aa90f0a..2b3d1828db99 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -655,20 +655,13 @@ static void *hppfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 	return proc_dentry->d_inode->i_op->follow_link(proc_dentry, nd);
 }
 
-int hppfs_permission(struct inode *inode, int mask, struct nameidata *nd)
-{
-	return generic_permission(inode, mask, NULL);
-}
-
 static const struct inode_operations hppfs_dir_iops = {
 	.lookup		= hppfs_lookup,
-	.permission	= hppfs_permission,
 };
 
 static const struct inode_operations hppfs_link_iops = {
 	.readlink	= hppfs_readlink,
 	.follow_link	= hppfs_follow_link,
-	.permission	= hppfs_permission,
 };
 
 static struct inode *get_inode(struct super_block *sb, struct dentry *dentry)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index aeabf80f81a5..3f58923fb39b 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -53,6 +53,7 @@ int sysctl_hugetlb_shm_group;
 enum {
 	Opt_size, Opt_nr_inodes,
 	Opt_mode, Opt_uid, Opt_gid,
+	Opt_pagesize,
 	Opt_err,
 };
 
@@ -62,6 +63,7 @@ static match_table_t tokens = {
 	{Opt_mode,	"mode=%o"},
 	{Opt_uid,	"uid=%u"},
 	{Opt_gid,	"gid=%u"},
+	{Opt_pagesize,	"pagesize=%s"},
 	{Opt_err,	NULL},
 };
 
@@ -80,6 +82,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 	struct inode *inode = file->f_path.dentry->d_inode;
 	loff_t len, vma_len;
 	int ret;
+	struct hstate *h = hstate_file(file);
 
 	/*
 	 * vma address alignment (but not the pgoff alignment) has
@@ -92,7 +95,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 	vma->vm_flags |= VM_HUGETLB | VM_RESERVED;
 	vma->vm_ops = &hugetlb_vm_ops;
 
-	if (vma->vm_pgoff & ~(HPAGE_MASK >> PAGE_SHIFT))
+	if (vma->vm_pgoff & ~(huge_page_mask(h) >> PAGE_SHIFT))
 		return -EINVAL;
 
 	vma_len = (loff_t)(vma->vm_end - vma->vm_start);
@@ -103,9 +106,9 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 	ret = -ENOMEM;
 	len = vma_len + ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
 
-	if (vma->vm_flags & VM_MAYSHARE &&
-	    hugetlb_reserve_pages(inode, vma->vm_pgoff >> (HPAGE_SHIFT-PAGE_SHIFT),
-				  len >> HPAGE_SHIFT))
+	if (hugetlb_reserve_pages(inode,
+				vma->vm_pgoff >> huge_page_order(h),
+				len >> huge_page_shift(h), vma))
 		goto out;
 
 	ret = 0;
@@ -130,20 +133,21 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
 	struct mm_struct *mm = current->mm;
 	struct vm_area_struct *vma;
 	unsigned long start_addr;
+	struct hstate *h = hstate_file(file);
 
-	if (len & ~HPAGE_MASK)
+	if (len & ~huge_page_mask(h))
 		return -EINVAL;
 	if (len > TASK_SIZE)
 		return -ENOMEM;
 
 	if (flags & MAP_FIXED) {
-		if (prepare_hugepage_range(addr, len))
+		if (prepare_hugepage_range(file, addr, len))
 			return -EINVAL;
 		return addr;
 	}
 
 	if (addr) {
-		addr = ALIGN(addr, HPAGE_SIZE);
+		addr = ALIGN(addr, huge_page_size(h));
 		vma = find_vma(mm, addr);
 		if (TASK_SIZE - len >= addr &&
 		    (!vma || addr + len <= vma->vm_start))
@@ -156,7 +160,7 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
 		start_addr = TASK_UNMAPPED_BASE;
 
 full_search:
-	addr = ALIGN(start_addr, HPAGE_SIZE);
+	addr = ALIGN(start_addr, huge_page_size(h));
 
 	for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
 		/* At this point:  (!vma || addr < vma->vm_end). */
@@ -174,7 +178,7 @@ full_search:
 
 		if (!vma || addr + len <= vma->vm_start)
 			return addr;
-		addr = ALIGN(vma->vm_end, HPAGE_SIZE);
+		addr = ALIGN(vma->vm_end, huge_page_size(h));
 	}
 }
 #endif
@@ -225,10 +229,11 @@ hugetlbfs_read_actor(struct page *page, unsigned long offset,
 static ssize_t hugetlbfs_read(struct file *filp, char __user *buf,
 			      size_t len, loff_t *ppos)
 {
+	struct hstate *h = hstate_file(filp);
 	struct address_space *mapping = filp->f_mapping;
 	struct inode *inode = mapping->host;
-	unsigned long index = *ppos >> HPAGE_SHIFT;
-	unsigned long offset = *ppos & ~HPAGE_MASK;
+	unsigned long index = *ppos >> huge_page_shift(h);
+	unsigned long offset = *ppos & ~huge_page_mask(h);
 	unsigned long end_index;
 	loff_t isize;
 	ssize_t retval = 0;
@@ -243,17 +248,17 @@ static ssize_t hugetlbfs_read(struct file *filp, char __user *buf,
 	if (!isize)
 		goto out;
 
-	end_index = (isize - 1) >> HPAGE_SHIFT;
+	end_index = (isize - 1) >> huge_page_shift(h);
 	for (;;) {
 		struct page *page;
-		int nr, ret;
+		unsigned long nr, ret;
 
 		/* nr is the maximum number of bytes to copy from this page */
-		nr = HPAGE_SIZE;
+		nr = huge_page_size(h);
 		if (index >= end_index) {
 			if (index > end_index)
 				goto out;
-			nr = ((isize - 1) & ~HPAGE_MASK) + 1;
+			nr = ((isize - 1) & ~huge_page_mask(h)) + 1;
 			if (nr <= offset) {
 				goto out;
 			}
@@ -287,8 +292,8 @@ static ssize_t hugetlbfs_read(struct file *filp, char __user *buf,
 		offset += ret;
 		retval += ret;
 		len -= ret;
-		index += offset >> HPAGE_SHIFT;
-		offset &= ~HPAGE_MASK;
+		index += offset >> huge_page_shift(h);
+		offset &= ~huge_page_mask(h);
 
 		if (page)
 			page_cache_release(page);
@@ -298,7 +303,7 @@ static ssize_t hugetlbfs_read(struct file *filp, char __user *buf,
 			break;
 	}
 out:
-	*ppos = ((loff_t)index << HPAGE_SHIFT) + offset;
+	*ppos = ((loff_t)index << huge_page_shift(h)) + offset;
 	mutex_unlock(&inode->i_mutex);
 	return retval;
 }
@@ -339,8 +344,9 @@ static void truncate_huge_page(struct page *page)
 
 static void truncate_hugepages(struct inode *inode, loff_t lstart)
 {
+	struct hstate *h = hstate_inode(inode);
 	struct address_space *mapping = &inode->i_data;
-	const pgoff_t start = lstart >> HPAGE_SHIFT;
+	const pgoff_t start = lstart >> huge_page_shift(h);
 	struct pagevec pvec;
 	pgoff_t next;
 	int i, freed = 0;
@@ -441,7 +447,7 @@ hugetlb_vmtruncate_list(struct prio_tree_root *root, pgoff_t pgoff)
 			v_offset = 0;
 
 		__unmap_hugepage_range(vma,
-				vma->vm_start + v_offset, vma->vm_end);
+				vma->vm_start + v_offset, vma->vm_end, NULL);
 	}
 }
 
@@ -449,8 +455,9 @@ static int hugetlb_vmtruncate(struct inode *inode, loff_t offset)
 {
 	pgoff_t pgoff;
 	struct address_space *mapping = inode->i_mapping;
+	struct hstate *h = hstate_inode(inode);
 
-	BUG_ON(offset & ~HPAGE_MASK);
+	BUG_ON(offset & ~huge_page_mask(h));
 	pgoff = offset >> PAGE_SHIFT;
 
 	i_size_write(inode, offset);
@@ -465,6 +472,7 @@ static int hugetlb_vmtruncate(struct inode *inode, loff_t offset)
 static int hugetlbfs_setattr(struct dentry *dentry, struct iattr *attr)
 {
 	struct inode *inode = dentry->d_inode;
+	struct hstate *h = hstate_inode(inode);
 	int error;
 	unsigned int ia_valid = attr->ia_valid;
 
@@ -476,7 +484,7 @@ static int hugetlbfs_setattr(struct dentry *dentry, struct iattr *attr)
 
 	if (ia_valid & ATTR_SIZE) {
 		error = -EINVAL;
-		if (!(attr->ia_size & ~HPAGE_MASK))
+		if (!(attr->ia_size & ~huge_page_mask(h)))
 			error = hugetlb_vmtruncate(inode, attr->ia_size);
 		if (error)
 			goto out;
@@ -610,9 +618,10 @@ static int hugetlbfs_set_page_dirty(struct page *page)
 static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(dentry->d_sb);
+	struct hstate *h = hstate_inode(dentry->d_inode);
 
 	buf->f_type = HUGETLBFS_MAGIC;
-	buf->f_bsize = HPAGE_SIZE;
+	buf->f_bsize = huge_page_size(h);
 	if (sbinfo) {
 		spin_lock(&sbinfo->stat_lock);
 		/* If no limits set, just report 0 for max/free/used
@@ -696,7 +705,7 @@ static const struct address_space_operations hugetlbfs_aops = {
 };
 
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
 
@@ -743,6 +752,8 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
 	char *p, *rest;
 	substring_t args[MAX_OPT_ARGS];
 	int option;
+	unsigned long long size = 0;
+	enum { NO_SIZE, SIZE_STD, SIZE_PERCENT } setsize = NO_SIZE;
 
 	if (!options)
 		return 0;
@@ -773,17 +784,13 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
 			break;
 
 		case Opt_size: {
- 			unsigned long long size;
 			/* memparse() will accept a K/M/G without a digit */
 			if (!isdigit(*args[0].from))
 				goto bad_val;
 			size = memparse(args[0].from, &rest);
-			if (*rest == '%') {
-				size <<= HPAGE_SHIFT;
-				size *= max_huge_pages;
-				do_div(size, 100);
-			}
-			pconfig->nr_blocks = (size >> HPAGE_SHIFT);
+			setsize = SIZE_STD;
+			if (*rest == '%')
+				setsize = SIZE_PERCENT;
 			break;
 		}
 
@@ -794,6 +801,19 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
 			pconfig->nr_inodes = memparse(args[0].from, &rest);
 			break;
 
+		case Opt_pagesize: {
+			unsigned long ps;
+			ps = memparse(args[0].from, &rest);
+			pconfig->hstate = size_to_hstate(ps);
+			if (!pconfig->hstate) {
+				printk(KERN_ERR
+				"hugetlbfs: Unsupported page size %lu MB\n",
+					ps >> 20);
+				return -EINVAL;
+			}
+			break;
+		}
+
 		default:
 			printk(KERN_ERR "hugetlbfs: Bad mount option: \"%s\"\n",
 				 p);
@@ -801,6 +821,18 @@ hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
 			break;
 		}
 	}
+
+	/* Do size after hstate is set up */
+	if (setsize > NO_SIZE) {
+		struct hstate *h = pconfig->hstate;
+		if (setsize == SIZE_PERCENT) {
+			size <<= huge_page_shift(h);
+			size *= h->max_huge_pages;
+			do_div(size, 100);
+		}
+		pconfig->nr_blocks = (size >> huge_page_shift(h));
+	}
+
 	return 0;
 
 bad_val:
@@ -825,6 +857,7 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
 	config.uid = current->fsuid;
 	config.gid = current->fsgid;
 	config.mode = 0755;
+	config.hstate = &default_hstate;
 	ret = hugetlbfs_parse_options(data, &config);
 	if (ret)
 		return ret;
@@ -833,14 +866,15 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
 	if (!sbinfo)
 		return -ENOMEM;
 	sb->s_fs_info = sbinfo;
+	sbinfo->hstate = config.hstate;
 	spin_lock_init(&sbinfo->stat_lock);
 	sbinfo->max_blocks = config.nr_blocks;
 	sbinfo->free_blocks = config.nr_blocks;
 	sbinfo->max_inodes = config.nr_inodes;
 	sbinfo->free_inodes = config.nr_inodes;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
-	sb->s_blocksize = HPAGE_SIZE;
-	sb->s_blocksize_bits = HPAGE_SHIFT;
+	sb->s_blocksize = huge_page_size(config.hstate);
+	sb->s_blocksize_bits = huge_page_shift(config.hstate);
 	sb->s_magic = HUGETLBFS_MAGIC;
 	sb->s_op = &hugetlbfs_ops;
 	sb->s_time_gran = 1;
@@ -942,7 +976,8 @@ struct file *hugetlb_file_setup(const char *name, size_t size)
 		goto out_dentry;
 
 	error = -ENOMEM;
-	if (hugetlb_reserve_pages(inode, 0, size >> HPAGE_SHIFT))
+	if (hugetlb_reserve_pages(inode, 0,
+			size >> huge_page_shift(hstate_inode(inode)), NULL))
 		goto out_inode;
 
 	d_instantiate(dentry, inode);
diff --git a/fs/inode.c b/fs/inode.c
index c36d9480335c..b6726f644530 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -209,7 +209,7 @@ void inode_init_once(struct inode *inode)
 	INIT_LIST_HEAD(&inode->i_dentry);
 	INIT_LIST_HEAD(&inode->i_devices);
 	INIT_RADIX_TREE(&inode->i_data.page_tree, GFP_ATOMIC);
-	rwlock_init(&inode->i_data.tree_lock);
+	spin_lock_init(&inode->i_data.tree_lock);
 	spin_lock_init(&inode->i_data.i_mmap_lock);
 	INIT_LIST_HEAD(&inode->i_data.private_list);
 	spin_lock_init(&inode->i_data.private_lock);
@@ -224,7 +224,7 @@ void inode_init_once(struct inode *inode)
 
 EXPORT_SYMBOL(inode_init_once);
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct inode * inode = (struct inode *) foo;
 
diff --git a/fs/inotify_user.c b/fs/inotify_user.c
index 6676c06bb7c1..60249429a253 100644
--- a/fs/inotify_user.c
+++ b/fs/inotify_user.c
@@ -354,20 +354,20 @@ static void inotify_dev_event_dequeue(struct inotify_device *dev)
 }
 
 /*
- * find_inode - resolve a user-given path to a specific inode and return a nd
+ * find_inode - resolve a user-given path to a specific inode
  */
-static int find_inode(const char __user *dirname, struct nameidata *nd,
+static int find_inode(const char __user *dirname, struct path *path,
 		      unsigned flags)
 {
 	int error;
 
-	error = __user_walk(dirname, flags, nd);
+	error = user_path_at(AT_FDCWD, dirname, flags, path);
 	if (error)
 		return error;
 	/* you can only watch an inode if you have read permissions on it */
-	error = vfs_permission(nd, MAY_READ);
+	error = inode_permission(path->dentry->d_inode, MAY_READ);
 	if (error)
-		path_put(&nd->path);
+		path_put(path);
 	return error;
 }
 
@@ -566,7 +566,7 @@ static const struct inotify_operations inotify_user_ops = {
 	.destroy_watch	= free_inotify_user_watch,
 };
 
-asmlinkage long sys_inotify_init(void)
+asmlinkage long sys_inotify_init1(int flags)
 {
 	struct inotify_device *dev;
 	struct inotify_handle *ih;
@@ -574,7 +574,14 @@ asmlinkage long sys_inotify_init(void)
 	struct file *filp;
 	int fd, ret;
 
-	fd = get_unused_fd();
+	/* Check the IN_* constants for consistency.  */
+	BUILD_BUG_ON(IN_CLOEXEC != O_CLOEXEC);
+	BUILD_BUG_ON(IN_NONBLOCK != O_NONBLOCK);
+
+	if (flags & ~(IN_CLOEXEC | IN_NONBLOCK))
+		return -EINVAL;
+
+	fd = get_unused_fd_flags(flags & O_CLOEXEC);
 	if (fd < 0)
 		return fd;
 
@@ -610,7 +617,7 @@ asmlinkage long sys_inotify_init(void)
 	filp->f_path.dentry = dget(inotify_mnt->mnt_root);
 	filp->f_mapping = filp->f_path.dentry->d_inode->i_mapping;
 	filp->f_mode = FMODE_READ;
-	filp->f_flags = O_RDONLY;
+	filp->f_flags = O_RDONLY | (flags & O_NONBLOCK);
 	filp->private_data = dev;
 
 	INIT_LIST_HEAD(&dev->events);
@@ -638,11 +645,16 @@ out_put_fd:
 	return ret;
 }
 
-asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
+asmlinkage long sys_inotify_init(void)
+{
+	return sys_inotify_init1(0);
+}
+
+asmlinkage long sys_inotify_add_watch(int fd, const char __user *pathname, u32 mask)
 {
 	struct inode *inode;
 	struct inotify_device *dev;
-	struct nameidata nd;
+	struct path path;
 	struct file *filp;
 	int ret, fput_needed;
 	unsigned flags = 0;
@@ -662,12 +674,12 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
 	if (mask & IN_ONLYDIR)
 		flags |= LOOKUP_DIRECTORY;
 
-	ret = find_inode(path, &nd, flags);
+	ret = find_inode(pathname, &path, flags);
 	if (unlikely(ret))
 		goto fput_and_out;
 
-	/* inode held in place by reference to nd; dev by fget on fd */
-	inode = nd.path.dentry->d_inode;
+	/* inode held in place by reference to path; dev by fget on fd */
+	inode = path.dentry->d_inode;
 	dev = filp->private_data;
 
 	mutex_lock(&dev->up_mutex);
@@ -676,7 +688,7 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
 		ret = create_watch(dev, inode, mask);
 	mutex_unlock(&dev->up_mutex);
 
-	path_put(&nd.path);
+	path_put(&path);
 fput_and_out:
 	fput_light(filp, fput_needed);
 	return ret;
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 044a254d526b..26948a6033b6 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -73,7 +73,7 @@ static void isofs_destroy_inode(struct inode *inode)
 	kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct iso_inode_info *ei = foo;
 
diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c
index 6bd48f0a7047..c2fb2dd0131f 100644
--- a/fs/isofs/rock.c
+++ b/fs/isofs/rock.c
@@ -209,6 +209,11 @@ repeat:
 
 	while (rs.len > 2) { /* There may be one byte for padding somewhere */
 		rr = (struct rock_ridge *)rs.chr;
+		/*
+		 * Ignore rock ridge info if rr->len is out of range, but
+		 * don't return -EIO because that would make the file
+		 * invisible.
+		 */
 		if (rr->len < 3)
 			goto out;	/* Something got screwed up here */
 		sig = isonum_721(rs.chr);
@@ -216,8 +221,12 @@ repeat:
 			goto eio;
 		rs.chr += rr->len;
 		rs.len -= rr->len;
+		/*
+		 * As above, just ignore the rock ridge info if rr->len
+		 * is bogus.
+		 */
 		if (rs.len < 0)
-			goto eio;	/* corrupted isofs */
+			goto out;	/* Something got screwed up here */
 
 		switch (sig) {
 		case SIG('R', 'R'):
@@ -307,6 +316,11 @@ parse_rock_ridge_inode_internal(struct iso_directory_record *de,
 repeat:
 	while (rs.len > 2) { /* There may be one byte for padding somewhere */
 		rr = (struct rock_ridge *)rs.chr;
+		/*
+		 * Ignore rock ridge info if rr->len is out of range, but
+		 * don't return -EIO because that would make the file
+		 * invisible.
+		 */
 		if (rr->len < 3)
 			goto out;	/* Something got screwed up here */
 		sig = isonum_721(rs.chr);
@@ -314,8 +328,12 @@ repeat:
 			goto eio;
 		rs.chr += rr->len;
 		rs.len -= rr->len;
+		/*
+		 * As above, just ignore the rock ridge info if rr->len
+		 * is bogus.
+		 */
 		if (rs.len < 0)
-			goto eio;	/* corrupted isofs */
+			goto out;	/* Something got screwed up here */
 
 		switch (sig) {
 #ifndef CONFIG_ZISOFS		/* No flag for SF or ZF */
diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c
index 5a8ca61498ca..2eccbfaa1d48 100644
--- a/fs/jbd/commit.c
+++ b/fs/jbd/commit.c
@@ -36,7 +36,7 @@ static void journal_end_buffer_io_sync(struct buffer_head *bh, int uptodate)
 
 /*
  * When an ext3-ordered file is truncated, it is possible that many pages are
- * not sucessfully freed, because they are attached to a committing transaction.
+ * not successfully freed, because they are attached to a committing transaction.
  * After the transaction commits, these pages are left on the LRU, with no
  * ->mapping, and with attached buffers.  These pages are trivially reclaimable
  * by the VM, but their apparent absence upsets the VM accounting, and it makes
@@ -45,8 +45,8 @@ static void journal_end_buffer_io_sync(struct buffer_head *bh, int uptodate)
  * So here, we have a buffer which has just come off the forget list.  Look to
  * see if we can strip all buffers from the backing page.
  *
- * Called under lock_journal(), and possibly under journal_datalist_lock.  The
- * caller provided us with a ref against the buffer, and we drop that here.
+ * Called under journal->j_list_lock.  The caller provided us with a ref
+ * against the buffer, and we drop that here.
  */
 static void release_buffer_page(struct buffer_head *bh)
 {
@@ -78,6 +78,19 @@ nope:
 }
 
 /*
+ * Decrement reference counter for data buffer. If it has been marked
+ * 'BH_Freed', release it and the page to which it belongs if possible.
+ */
+static void release_data_buffer(struct buffer_head *bh)
+{
+	if (buffer_freed(bh)) {
+		clear_buffer_freed(bh);
+		release_buffer_page(bh);
+	} else
+		put_bh(bh);
+}
+
+/*
  * Try to acquire jbd_lock_bh_state() against the buffer, when j_list_lock is
  * held.  For ranking reasons we must trylock.  If we lose, schedule away and
  * return 0.  j_list_lock is dropped in this case.
@@ -172,7 +185,7 @@ static void journal_do_submit_data(struct buffer_head **wbuf, int bufs)
 /*
  *  Submit all the data buffers to disk
  */
-static void journal_submit_data_buffers(journal_t *journal,
+static int journal_submit_data_buffers(journal_t *journal,
 				transaction_t *commit_transaction)
 {
 	struct journal_head *jh;
@@ -180,6 +193,7 @@ static void journal_submit_data_buffers(journal_t *journal,
 	int locked;
 	int bufs = 0;
 	struct buffer_head **wbuf = journal->j_wbuf;
+	int err = 0;
 
 	/*
 	 * Whenever we unlock the journal and sleep, things can get added
@@ -231,7 +245,7 @@ write_out_data:
 			if (locked)
 				unlock_buffer(bh);
 			BUFFER_TRACE(bh, "already cleaned up");
-			put_bh(bh);
+			release_data_buffer(bh);
 			continue;
 		}
 		if (locked && test_clear_buffer_dirty(bh)) {
@@ -253,15 +267,17 @@ write_out_data:
 			put_bh(bh);
 		} else {
 			BUFFER_TRACE(bh, "writeout complete: unfile");
+			if (unlikely(!buffer_uptodate(bh)))
+				err = -EIO;
 			__journal_unfile_buffer(jh);
 			jbd_unlock_bh_state(bh);
 			if (locked)
 				unlock_buffer(bh);
 			journal_remove_journal_head(bh);
-			/* Once for our safety reference, once for
+			/* One for our safety reference, other for
 			 * journal_remove_journal_head() */
 			put_bh(bh);
-			put_bh(bh);
+			release_data_buffer(bh);
 		}
 
 		if (need_resched() || spin_needbreak(&journal->j_list_lock)) {
@@ -271,6 +287,8 @@ write_out_data:
 	}
 	spin_unlock(&journal->j_list_lock);
 	journal_do_submit_data(wbuf, bufs);
+
+	return err;
 }
 
 /*
@@ -410,8 +428,7 @@ void journal_commit_transaction(journal_t *journal)
 	 * Now start flushing things to disk, in the order they appear
 	 * on the transaction lists.  Data blocks go first.
 	 */
-	err = 0;
-	journal_submit_data_buffers(journal, commit_transaction);
+	err = journal_submit_data_buffers(journal, commit_transaction);
 
 	/*
 	 * Wait for all previously submitted IO to complete.
@@ -426,10 +443,21 @@ void journal_commit_transaction(journal_t *journal)
 		if (buffer_locked(bh)) {
 			spin_unlock(&journal->j_list_lock);
 			wait_on_buffer(bh);
-			if (unlikely(!buffer_uptodate(bh)))
-				err = -EIO;
 			spin_lock(&journal->j_list_lock);
 		}
+		if (unlikely(!buffer_uptodate(bh))) {
+			if (TestSetPageLocked(bh->b_page)) {
+				spin_unlock(&journal->j_list_lock);
+				lock_page(bh->b_page);
+				spin_lock(&journal->j_list_lock);
+			}
+			if (bh->b_page->mapping)
+				set_bit(AS_EIO, &bh->b_page->mapping->flags);
+
+			unlock_page(bh->b_page);
+			SetPageError(bh->b_page);
+			err = -EIO;
+		}
 		if (!inverted_lock(journal, bh)) {
 			put_bh(bh);
 			spin_lock(&journal->j_list_lock);
@@ -443,17 +471,21 @@ void journal_commit_transaction(journal_t *journal)
 		} else {
 			jbd_unlock_bh_state(bh);
 		}
-		put_bh(bh);
+		release_data_buffer(bh);
 		cond_resched_lock(&journal->j_list_lock);
 	}
 	spin_unlock(&journal->j_list_lock);
 
-	if (err)
-		journal_abort(journal, err);
+	if (err) {
+		char b[BDEVNAME_SIZE];
 
-	journal_write_revoke_records(journal, commit_transaction);
+		printk(KERN_WARNING
+			"JBD: Detected IO errors while flushing file data "
+			"on %s\n", bdevname(journal->j_fs_dev, b));
+		err = 0;
+	}
 
-	jbd_debug(3, "JBD: commit phase 2\n");
+	journal_write_revoke_records(journal, commit_transaction);
 
 	/*
 	 * If we found any dirty or locked buffers, then we should have
diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index b99c3b3654c4..aa7143a8349b 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -68,7 +68,6 @@ EXPORT_SYMBOL(journal_set_features);
 EXPORT_SYMBOL(journal_create);
 EXPORT_SYMBOL(journal_load);
 EXPORT_SYMBOL(journal_destroy);
-EXPORT_SYMBOL(journal_update_superblock);
 EXPORT_SYMBOL(journal_abort);
 EXPORT_SYMBOL(journal_errno);
 EXPORT_SYMBOL(journal_ack_err);
@@ -1636,9 +1635,10 @@ static int journal_init_journal_head_cache(void)
 
 static void journal_destroy_journal_head_cache(void)
 {
-	J_ASSERT(journal_head_cache != NULL);
-	kmem_cache_destroy(journal_head_cache);
-	journal_head_cache = NULL;
+	if (journal_head_cache) {
+		kmem_cache_destroy(journal_head_cache);
+		journal_head_cache = NULL;
+	}
 }
 
 /*
diff --git a/fs/jbd/revoke.c b/fs/jbd/revoke.c
index 1bb43e987f4b..c7bd649bbbdc 100644
--- a/fs/jbd/revoke.c
+++ b/fs/jbd/revoke.c
@@ -166,138 +166,123 @@ static struct jbd_revoke_record_s *find_revoke_record(journal_t *journal,
 	return NULL;
 }
 
+void journal_destroy_revoke_caches(void)
+{
+	if (revoke_record_cache) {
+		kmem_cache_destroy(revoke_record_cache);
+		revoke_record_cache = NULL;
+	}
+	if (revoke_table_cache) {
+		kmem_cache_destroy(revoke_table_cache);
+		revoke_table_cache = NULL;
+	}
+}
+
 int __init journal_init_revoke_caches(void)
 {
+	J_ASSERT(!revoke_record_cache);
+	J_ASSERT(!revoke_table_cache);
+
 	revoke_record_cache = kmem_cache_create("revoke_record",
 					   sizeof(struct jbd_revoke_record_s),
 					   0,
 					   SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY,
 					   NULL);
 	if (!revoke_record_cache)
-		return -ENOMEM;
+		goto record_cache_failure;
 
 	revoke_table_cache = kmem_cache_create("revoke_table",
 					   sizeof(struct jbd_revoke_table_s),
 					   0, SLAB_TEMPORARY, NULL);
-	if (!revoke_table_cache) {
-		kmem_cache_destroy(revoke_record_cache);
-		revoke_record_cache = NULL;
-		return -ENOMEM;
-	}
+	if (!revoke_table_cache)
+		goto table_cache_failure;
+
 	return 0;
-}
 
-void journal_destroy_revoke_caches(void)
-{
-	kmem_cache_destroy(revoke_record_cache);
-	revoke_record_cache = NULL;
-	kmem_cache_destroy(revoke_table_cache);
-	revoke_table_cache = NULL;
+table_cache_failure:
+	journal_destroy_revoke_caches();
+record_cache_failure:
+	return -ENOMEM;
 }
 
-/* Initialise the revoke table for a given journal to a given size. */
-
-int journal_init_revoke(journal_t *journal, int hash_size)
+static struct jbd_revoke_table_s *journal_init_revoke_table(int hash_size)
 {
-	int shift, tmp;
+	int shift = 0;
+	int tmp = hash_size;
+	struct jbd_revoke_table_s *table;
 
-	J_ASSERT (journal->j_revoke_table[0] == NULL);
+	table = kmem_cache_alloc(revoke_table_cache, GFP_KERNEL);
+	if (!table)
+		goto out;
 
-	shift = 0;
-	tmp = hash_size;
 	while((tmp >>= 1UL) != 0UL)
 		shift++;
 
-	journal->j_revoke_table[0] = kmem_cache_alloc(revoke_table_cache, GFP_KERNEL);
-	if (!journal->j_revoke_table[0])
-		return -ENOMEM;
-	journal->j_revoke = journal->j_revoke_table[0];
-
-	/* Check that the hash_size is a power of two */
-	J_ASSERT(is_power_of_2(hash_size));
-
-	journal->j_revoke->hash_size = hash_size;
-
-	journal->j_revoke->hash_shift = shift;
-
-	journal->j_revoke->hash_table =
+	table->hash_size = hash_size;
+	table->hash_shift = shift;
+	table->hash_table =
 		kmalloc(hash_size * sizeof(struct list_head), GFP_KERNEL);
-	if (!journal->j_revoke->hash_table) {
-		kmem_cache_free(revoke_table_cache, journal->j_revoke_table[0]);
-		journal->j_revoke = NULL;
-		return -ENOMEM;
+	if (!table->hash_table) {
+		kmem_cache_free(revoke_table_cache, table);
+		table = NULL;
+		goto out;
 	}
 
 	for (tmp = 0; tmp < hash_size; tmp++)
-		INIT_LIST_HEAD(&journal->j_revoke->hash_table[tmp]);
+		INIT_LIST_HEAD(&table->hash_table[tmp]);
 
-	journal->j_revoke_table[1] = kmem_cache_alloc(revoke_table_cache, GFP_KERNEL);
-	if (!journal->j_revoke_table[1]) {
-		kfree(journal->j_revoke_table[0]->hash_table);
-		kmem_cache_free(revoke_table_cache, journal->j_revoke_table[0]);
-		return -ENOMEM;
+out:
+	return table;
+}
+
+static void journal_destroy_revoke_table(struct jbd_revoke_table_s *table)
+{
+	int i;
+	struct list_head *hash_list;
+
+	for (i = 0; i < table->hash_size; i++) {
+		hash_list = &table->hash_table[i];
+		J_ASSERT(list_empty(hash_list));
 	}
 
-	journal->j_revoke = journal->j_revoke_table[1];
+	kfree(table->hash_table);
+	kmem_cache_free(revoke_table_cache, table);
+}
 
-	/* Check that the hash_size is a power of two */
+/* Initialise the revoke table for a given journal to a given size. */
+int journal_init_revoke(journal_t *journal, int hash_size)
+{
+	J_ASSERT(journal->j_revoke_table[0] == NULL);
 	J_ASSERT(is_power_of_2(hash_size));
 
-	journal->j_revoke->hash_size = hash_size;
+	journal->j_revoke_table[0] = journal_init_revoke_table(hash_size);
+	if (!journal->j_revoke_table[0])
+		goto fail0;
 
-	journal->j_revoke->hash_shift = shift;
+	journal->j_revoke_table[1] = journal_init_revoke_table(hash_size);
+	if (!journal->j_revoke_table[1])
+		goto fail1;
 
-	journal->j_revoke->hash_table =
-		kmalloc(hash_size * sizeof(struct list_head), GFP_KERNEL);
-	if (!journal->j_revoke->hash_table) {
-		kfree(journal->j_revoke_table[0]->hash_table);
-		kmem_cache_free(revoke_table_cache, journal->j_revoke_table[0]);
-		kmem_cache_free(revoke_table_cache, journal->j_revoke_table[1]);
-		journal->j_revoke = NULL;
-		return -ENOMEM;
-	}
-
-	for (tmp = 0; tmp < hash_size; tmp++)
-		INIT_LIST_HEAD(&journal->j_revoke->hash_table[tmp]);
+	journal->j_revoke = journal->j_revoke_table[1];
 
 	spin_lock_init(&journal->j_revoke_lock);
 
 	return 0;
-}
 
-/* Destoy a journal's revoke table.  The table must already be empty! */
+fail1:
+	journal_destroy_revoke_table(journal->j_revoke_table[0]);
+fail0:
+	return -ENOMEM;
+}
 
+/* Destroy a journal's revoke table.  The table must already be empty! */
 void journal_destroy_revoke(journal_t *journal)
 {
-	struct jbd_revoke_table_s *table;
-	struct list_head *hash_list;
-	int i;
-
-	table = journal->j_revoke_table[0];
-	if (!table)
-		return;
-
-	for (i=0; i<table->hash_size; i++) {
-		hash_list = &table->hash_table[i];
-		J_ASSERT (list_empty(hash_list));
-	}
-
-	kfree(table->hash_table);
-	kmem_cache_free(revoke_table_cache, table);
-	journal->j_revoke = NULL;
-
-	table = journal->j_revoke_table[1];
-	if (!table)
-		return;
-
-	for (i=0; i<table->hash_size; i++) {
-		hash_list = &table->hash_table[i];
-		J_ASSERT (list_empty(hash_list));
-	}
-
-	kfree(table->hash_table);
-	kmem_cache_free(revoke_table_cache, table);
 	journal->j_revoke = NULL;
+	if (journal->j_revoke_table[0])
+		journal_destroy_revoke_table(journal->j_revoke_table[0]);
+	if (journal->j_revoke_table[1])
+		journal_destroy_revoke_table(journal->j_revoke_table[1]);
 }
 
 
diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c
index 67ff2024c23c..8dee32007500 100644
--- a/fs/jbd/transaction.c
+++ b/fs/jbd/transaction.c
@@ -1648,12 +1648,42 @@ out:
 	return;
 }
 
+/*
+ * journal_try_to_free_buffers() could race with journal_commit_transaction()
+ * The latter might still hold the a count on buffers when inspecting
+ * them on t_syncdata_list or t_locked_list.
+ *
+ * journal_try_to_free_buffers() will call this function to
+ * wait for the current transaction to finish syncing data buffers, before
+ * tryinf to free that buffer.
+ *
+ * Called with journal->j_state_lock held.
+ */
+static void journal_wait_for_transaction_sync_data(journal_t *journal)
+{
+	transaction_t *transaction = NULL;
+	tid_t tid;
+
+	spin_lock(&journal->j_state_lock);
+	transaction = journal->j_committing_transaction;
+
+	if (!transaction) {
+		spin_unlock(&journal->j_state_lock);
+		return;
+	}
+
+	tid = transaction->t_tid;
+	spin_unlock(&journal->j_state_lock);
+	log_wait_commit(journal, tid);
+}
 
 /**
  * int journal_try_to_free_buffers() - try to free page buffers.
  * @journal: journal for operation
  * @page: to try and free
- * @unused_gfp_mask: unused
+ * @gfp_mask: we use the mask to detect how hard should we try to release
+ * buffers. If __GFP_WAIT and __GFP_FS is set, we wait for commit code to
+ * release the buffers.
  *
  *
  * For all the buffers on this page,
@@ -1682,9 +1712,11 @@ out:
  * journal_try_to_free_buffer() is changing its state.  But that
  * cannot happen because we never reallocate freed data as metadata
  * while the data is part of a transaction.  Yes?
+ *
+ * Return 0 on failure, 1 on success
  */
 int journal_try_to_free_buffers(journal_t *journal,
-				struct page *page, gfp_t unused_gfp_mask)
+				struct page *page, gfp_t gfp_mask)
 {
 	struct buffer_head *head;
 	struct buffer_head *bh;
@@ -1713,7 +1745,28 @@ int journal_try_to_free_buffers(journal_t *journal,
 		if (buffer_jbd(bh))
 			goto busy;
 	} while ((bh = bh->b_this_page) != head);
+
 	ret = try_to_free_buffers(page);
+
+	/*
+	 * There are a number of places where journal_try_to_free_buffers()
+	 * could race with journal_commit_transaction(), the later still
+	 * holds the reference to the buffers to free while processing them.
+	 * try_to_free_buffers() failed to free those buffers. Some of the
+	 * caller of releasepage() request page buffers to be dropped, otherwise
+	 * treat the fail-to-free as errors (such as generic_file_direct_IO())
+	 *
+	 * So, if the caller of try_to_release_page() wants the synchronous
+	 * behaviour(i.e make sure buffers are dropped upon return),
+	 * let's wait for the current transaction to finish flush of
+	 * dirty data buffers, then try to free those buffers again,
+	 * with the journal locked.
+	 */
+	if (ret == 0 && (gfp_mask & __GFP_WAIT) && (gfp_mask & __GFP_FS)) {
+		journal_wait_for_transaction_sync_data(journal);
+		ret = try_to_free_buffers(page);
+	}
+
 busy:
 	return ret;
 }
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index 4c80404a9aba..d98713777a1b 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -314,7 +314,7 @@ static int jffs2_check_acl(struct inode *inode, int mask)
 	return -EAGAIN;
 }
 
-int jffs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+int jffs2_permission(struct inode *inode, int mask)
 {
 	return generic_permission(inode, mask, jffs2_check_acl);
 }
diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h
index 0bb7f003fd80..8ca058aed384 100644
--- a/fs/jffs2/acl.h
+++ b/fs/jffs2/acl.h
@@ -28,7 +28,7 @@ struct jffs2_acl_header {
 
 #define JFFS2_ACL_NOT_CACHED ((void *)-1)
 
-extern int jffs2_permission(struct inode *, int, struct nameidata *);
+extern int jffs2_permission(struct inode *, int);
 extern int jffs2_acl_chmod(struct inode *);
 extern int jffs2_init_acl_pre(struct inode *, struct inode *, int *);
 extern int jffs2_init_acl_post(struct inode *);
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index c0c141f6fde1..cd219ef55254 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -38,7 +38,7 @@ const struct file_operations jffs2_dir_operations =
 {
 	.read =		generic_read_dir,
 	.readdir =	jffs2_readdir,
-	.ioctl =	jffs2_ioctl,
+	.unlocked_ioctl=jffs2_ioctl,
 	.fsync =	jffs2_fsync
 };
 
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 5e920343b2c5..5a98aa87c853 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -46,7 +46,7 @@ const struct file_operations jffs2_file_operations =
  	.aio_read =	generic_file_aio_read,
  	.write =	do_sync_write,
  	.aio_write =	generic_file_aio_write,
-	.ioctl =	jffs2_ioctl,
+	.unlocked_ioctl=jffs2_ioctl,
 	.mmap =		generic_file_readonly_mmap,
 	.fsync =	jffs2_fsync,
 	.splice_read =	generic_file_splice_read,
diff --git a/fs/jffs2/ioctl.c b/fs/jffs2/ioctl.c
index e2177210f621..9d41f43e47bb 100644
--- a/fs/jffs2/ioctl.c
+++ b/fs/jffs2/ioctl.c
@@ -12,8 +12,7 @@
 #include <linux/fs.h>
 #include "nodelist.h"
 
-int jffs2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
-		unsigned long arg)
+long jffs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	/* Later, this will provide for lsattr.jffs2 and chattr.jffs2, which
 	   will include compression support etc. */
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index 2cc866cf134f..5e194a5c8e29 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -167,7 +167,7 @@ int jffs2_fsync(struct file *, struct dentry *, int);
 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 
 /* ioctl.c */
-int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
+long jffs2_ioctl(struct file *, unsigned int, unsigned long);
 
 /* symlink.c */
 extern const struct inode_operations jffs2_symlink_inode_operations;
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 7da69eae49e4..efd401257ed9 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -44,7 +44,7 @@ static void jffs2_destroy_inode(struct inode *inode)
 	kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode));
 }
 
-static void jffs2_i_init_once(struct kmem_cache *cachep, void *foo)
+static void jffs2_i_init_once(void *foo)
 {
 	struct jffs2_inode_info *f = foo;
 
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 4d84bdc88299..d3e5c33665de 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -140,7 +140,7 @@ static int jfs_check_acl(struct inode *inode, int mask)
 	return -EAGAIN;
 }
 
-int jfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int jfs_permission(struct inode *inode, int mask)
 {
 	return generic_permission(inode, mask, jfs_check_acl);
 }
diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h
index 455fa4292045..88475f10a389 100644
--- a/fs/jfs/jfs_acl.h
+++ b/fs/jfs/jfs_acl.h
@@ -20,7 +20,7 @@
 
 #ifdef CONFIG_JFS_POSIX_ACL
 
-int jfs_permission(struct inode *, int, struct nameidata *);
+int jfs_permission(struct inode *, int);
 int jfs_init_acl(tid_t, struct inode *, struct inode *);
 int jfs_setattr(struct dentry *, struct iattr *);
 
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 854ff0ec574f..c350057087dd 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -182,7 +182,7 @@ static inline void remove_metapage(struct page *page, struct metapage *mp)
 
 #endif
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct metapage *mp = (struct metapage *)foo;
 
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 0288e6d7936a..3630718be395 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -22,6 +22,7 @@
 #include <linux/parser.h>
 #include <linux/completion.h>
 #include <linux/vfs.h>
+#include <linux/quotaops.h>
 #include <linux/mount.h>
 #include <linux/moduleparam.h>
 #include <linux/kthread.h>
@@ -759,7 +760,7 @@ static struct file_system_type jfs_fs_type = {
 	.fs_flags	= FS_REQUIRES_DEV,
 };
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
 
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 1f6dc518505c..31668b690e03 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -582,7 +582,15 @@ again:
 	}
 	if (status < 0)
 		goto out_unlock;
-	status = nlm_stat_to_errno(resp->status);
+	/*
+	 * EAGAIN doesn't make sense for sleeping locks, and in some
+	 * cases NLM_LCK_DENIED is returned for a permanent error.  So
+	 * turn it into an ENOLCK.
+	 */
+	if (resp->status == nlm_lck_denied && (fl_flags & FL_SLEEP))
+		status = -ENOLCK;
+	else
+		status = nlm_stat_to_errno(resp->status);
 out_unblock:
 	nlmclnt_finish_block(block);
 out:
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index 821b9acdfb66..cf0d5c2c318d 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -418,8 +418,8 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
 			goto out;
 		case -EAGAIN:
 			ret = nlm_lck_denied;
-			break;
-		case -EINPROGRESS:
+			goto out;
+		case FILE_LOCK_DEFERRED:
 			if (wait)
 				break;
 			/* Filesystem lock operation is in progress
@@ -434,10 +434,6 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
 			goto out;
 	}
 
-	ret = nlm_lck_denied;
-	if (!wait)
-		goto out;
-
 	ret = nlm_lck_blocked;
 
 	/* Append to list of blocked */
@@ -507,7 +503,7 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
 	}
 
 	error = vfs_test_lock(file->f_file, &lock->fl);
-	if (error == -EINPROGRESS) {
+	if (error == FILE_LOCK_DEFERRED) {
 		ret = nlmsvc_defer_lock_rqst(rqstp, block);
 		goto out;
 	}
@@ -731,8 +727,7 @@ nlmsvc_grant_blocked(struct nlm_block *block)
 	switch (error) {
 	case 0:
 		break;
-	case -EAGAIN:
-	case -EINPROGRESS:
+	case FILE_LOCK_DEFERRED:
 		dprintk("lockd: lock still blocked error %d\n", error);
 		nlmsvc_insert_block(block, NLM_NEVER);
 		nlmsvc_release_block(block);
diff --git a/fs/locks.c b/fs/locks.c
index dce8c747371c..5eb259e3cd38 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -201,7 +201,7 @@ EXPORT_SYMBOL(locks_init_lock);
  * Initialises the fields of the file lock which are invariant for
  * free file_locks.
  */
-static void init_once(struct kmem_cache *cache, void *foo)
+static void init_once(void *foo)
 {
 	struct file_lock *lock = (struct file_lock *) foo;
 
@@ -779,8 +779,10 @@ find_conflict:
 		if (!flock_locks_conflict(request, fl))
 			continue;
 		error = -EAGAIN;
-		if (request->fl_flags & FL_SLEEP)
-			locks_insert_block(fl, request);
+		if (!(request->fl_flags & FL_SLEEP))
+			goto out;
+		error = FILE_LOCK_DEFERRED;
+		locks_insert_block(fl, request);
 		goto out;
 	}
 	if (request->fl_flags & FL_ACCESS)
@@ -836,7 +838,7 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
 			error = -EDEADLK;
 			if (posix_locks_deadlock(request, fl))
 				goto out;
-			error = -EAGAIN;
+			error = FILE_LOCK_DEFERRED;
 			locks_insert_block(fl, request);
 			goto out;
   		}
@@ -1035,7 +1037,7 @@ int posix_lock_file_wait(struct file *filp, struct file_lock *fl)
 	might_sleep ();
 	for (;;) {
 		error = posix_lock_file(filp, fl, NULL);
-		if ((error != -EAGAIN) || !(fl->fl_flags & FL_SLEEP))
+		if (error != FILE_LOCK_DEFERRED)
 			break;
 		error = wait_event_interruptible(fl->fl_wait, !fl->fl_next);
 		if (!error)
@@ -1107,9 +1109,7 @@ int locks_mandatory_area(int read_write, struct inode *inode,
 
 	for (;;) {
 		error = __posix_lock_file(inode, &fl, NULL);
-		if (error != -EAGAIN)
-			break;
-		if (!(fl.fl_flags & FL_SLEEP))
+		if (error != FILE_LOCK_DEFERRED)
 			break;
 		error = wait_event_interruptible(fl.fl_wait, !fl.fl_next);
 		if (!error) {
@@ -1531,7 +1531,7 @@ int flock_lock_file_wait(struct file *filp, struct file_lock *fl)
 	might_sleep();
 	for (;;) {
 		error = flock_lock_file(filp, fl);
-		if ((error != -EAGAIN) || !(fl->fl_flags & FL_SLEEP))
+		if (error != FILE_LOCK_DEFERRED)
 			break;
 		error = wait_event_interruptible(fl->fl_wait, !fl->fl_next);
 		if (!error)
@@ -1716,17 +1716,17 @@ out:
  * fl_grant is set. Callers expecting ->lock() to return asynchronously
  * will only use F_SETLK, not F_SETLKW; they will set FL_SLEEP if (and only if)
  * the request is for a blocking lock. When ->lock() does return asynchronously,
- * it must return -EINPROGRESS, and call ->fl_grant() when the lock
+ * it must return FILE_LOCK_DEFERRED, and call ->fl_grant() when the lock
  * request completes.
  * If the request is for non-blocking lock the file system should return
- * -EINPROGRESS then try to get the lock and call the callback routine with
- * the result. If the request timed out the callback routine will return a
+ * FILE_LOCK_DEFERRED then try to get the lock and call the callback routine
+ * with the result. If the request timed out the callback routine will return a
  * nonzero return code and the file system should release the lock. The file
  * system is also responsible to keep a corresponding posix lock when it
  * grants a lock so the VFS can find out which locks are locally held and do
  * the correct lock cleanup when required.
  * The underlying filesystem must not drop the kernel lock or call
- * ->fl_grant() before returning to the caller with a -EINPROGRESS
+ * ->fl_grant() before returning to the caller with a FILE_LOCK_DEFERRED
  * return code.
  */
 int vfs_lock_file(struct file *filp, unsigned int cmd, struct file_lock *fl, struct file_lock *conf)
@@ -1738,6 +1738,30 @@ int vfs_lock_file(struct file *filp, unsigned int cmd, struct file_lock *fl, str
 }
 EXPORT_SYMBOL_GPL(vfs_lock_file);
 
+static int do_lock_file_wait(struct file *filp, unsigned int cmd,
+			     struct file_lock *fl)
+{
+	int error;
+
+	error = security_file_lock(filp, fl->fl_type);
+	if (error)
+		return error;
+
+	for (;;) {
+		error = vfs_lock_file(filp, cmd, fl, NULL);
+		if (error != FILE_LOCK_DEFERRED)
+			break;
+		error = wait_event_interruptible(fl->fl_wait, !fl->fl_next);
+		if (!error)
+			continue;
+
+		locks_delete_block(fl);
+		break;
+	}
+
+	return error;
+}
+
 /* Apply the lock described by l to an open file descriptor.
  * This implements both the F_SETLK and F_SETLKW commands of fcntl().
  */
@@ -1795,26 +1819,7 @@ again:
 		goto out;
 	}
 
-	error = security_file_lock(filp, file_lock->fl_type);
-	if (error)
-		goto out;
-
-	if (filp->f_op && filp->f_op->lock != NULL)
-		error = filp->f_op->lock(filp, cmd, file_lock);
-	else {
-		for (;;) {
-			error = posix_lock_file(filp, file_lock, NULL);
-			if (error != -EAGAIN || cmd == F_SETLK)
-				break;
-			error = wait_event_interruptible(file_lock->fl_wait,
-					!file_lock->fl_next);
-			if (!error)
-				continue;
-
-			locks_delete_block(file_lock);
-			break;
-		}
-	}
+	error = do_lock_file_wait(filp, cmd, file_lock);
 
 	/*
 	 * Attempt to detect a close/fcntl race and recover by
@@ -1932,26 +1937,7 @@ again:
 		goto out;
 	}
 
-	error = security_file_lock(filp, file_lock->fl_type);
-	if (error)
-		goto out;
-
-	if (filp->f_op && filp->f_op->lock != NULL)
-		error = filp->f_op->lock(filp, cmd, file_lock);
-	else {
-		for (;;) {
-			error = posix_lock_file(filp, file_lock, NULL);
-			if (error != -EAGAIN || cmd == F_SETLK64)
-				break;
-			error = wait_event_interruptible(file_lock->fl_wait,
-					!file_lock->fl_next);
-			if (!error)
-				continue;
-
-			locks_delete_block(file_lock);
-			break;
-		}
-	}
+	error = do_lock_file_wait(filp, cmd, file_lock);
 
 	/*
 	 * Attempt to detect a close/fcntl race and recover by
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 84f6242ba6fc..d1d1eb84679d 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -68,7 +68,7 @@ static void minix_destroy_inode(struct inode *inode)
 	kmem_cache_free(minix_inode_cachep, minix_i(inode));
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct minix_inode_info *ei = (struct minix_inode_info *) foo;
 
@@ -256,9 +256,6 @@ static int minix_fill_super(struct super_block *s, void *data, int silent)
 	if (!s->s_root)
 		goto out_iput;
 
-	if (!NO_TRUNCATE)
-		s->s_root->d_op = &minix_dentry_operations;
-
 	if (!(s->s_flags & MS_RDONLY)) {
 		if (sbi->s_version != MINIX_V3) /* s_state is now out from V3 sb */
 			ms->s_state &= ~MINIX_VALID_FS;
diff --git a/fs/minix/minix.h b/fs/minix/minix.h
index 326edfe96108..e6a0b193bea4 100644
--- a/fs/minix/minix.h
+++ b/fs/minix/minix.h
@@ -2,11 +2,6 @@
 #include <linux/pagemap.h>
 #include <linux/minix_fs.h>
 
-/*
- * change the define below to 0 if you want names > info->s_namelen chars to be
- * truncated. Else they will be disallowed (ENAMETOOLONG).
- */
-#define NO_TRUNCATE 1
 #define INODE_VERSION(inode)	minix_sb(inode->i_sb)->s_version
 #define MINIX_V1		0x0001		/* original minix fs */
 #define MINIX_V2		0x0002		/* minix V2 fs */
@@ -83,7 +78,6 @@ extern const struct inode_operations minix_file_inode_operations;
 extern const struct inode_operations minix_dir_inode_operations;
 extern const struct file_operations minix_file_operations;
 extern const struct file_operations minix_dir_operations;
-extern struct dentry_operations minix_dentry_operations;
 
 static inline struct minix_sb_info *minix_sb(struct super_block *sb)
 {
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 102241bc9c79..32b131cd6121 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -18,30 +18,6 @@ static int add_nondir(struct dentry *dentry, struct inode *inode)
 	return err;
 }
 
-static int minix_hash(struct dentry *dentry, struct qstr *qstr)
-{
-	unsigned long hash;
-	int i;
-	const unsigned char *name;
-
-	i = minix_sb(dentry->d_inode->i_sb)->s_namelen;
-	if (i >= qstr->len)
-		return 0;
-	/* Truncate the name in place, avoids having to define a compare
-	   function. */
-	qstr->len = i;
-	name = qstr->name;
-	hash = init_name_hash();
-	while (i--)
-		hash = partial_name_hash(*name++, hash);
-	qstr->hash = end_name_hash(hash);
-	return 0;
-}
-
-struct dentry_operations minix_dentry_operations = {
-	.d_hash		= minix_hash,
-};
-
 static struct dentry *minix_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
 {
 	struct inode * inode = NULL;
diff --git a/fs/msdos/namei.c b/fs/msdos/namei.c
index 1f7f2956412a..e844b9809d27 100644
--- a/fs/msdos/namei.c
+++ b/fs/msdos/namei.c
@@ -14,12 +14,7 @@
 
 /* Characters that are undesirable in an MS-DOS file name */
 static unsigned char bad_chars[] = "*?<>|\"";
-static unsigned char bad_if_strict_pc[] = "+=,; ";
-/* GEMDOS is less restrictive */
-static unsigned char bad_if_strict_atari[] = " ";
-
-#define bad_if_strict(opts) \
-	((opts)->atari ? bad_if_strict_atari : bad_if_strict_pc)
+static unsigned char bad_if_strict[] = "+=,; ";
 
 /***** Formats an MS-DOS file name. Rejects invalid names. */
 static int msdos_format_name(const unsigned char *name, int len,
@@ -40,21 +35,20 @@ static int msdos_format_name(const unsigned char *name, int len,
 			/* Get rid of dot - test for it elsewhere */
 			name++;
 			len--;
-		} else if (!opts->atari)
+		} else
 			return -EINVAL;
 	}
 	/*
-	 * disallow names that _really_ start with a dot for MS-DOS,
-	 * GEMDOS does not care
+	 * disallow names that _really_ start with a dot
 	 */
-	space = !opts->atari;
+	space = 1;
 	c = 0;
 	for (walk = res; len && walk - res < 8; walk++) {
 		c = *name++;
 		len--;
 		if (opts->name_check != 'r' && strchr(bad_chars, c))
 			return -EINVAL;
-		if (opts->name_check == 's' && strchr(bad_if_strict(opts), c))
+		if (opts->name_check == 's' && strchr(bad_if_strict, c))
 			return -EINVAL;
 		if (c >= 'A' && c <= 'Z' && opts->name_check == 's')
 			return -EINVAL;
@@ -94,7 +88,7 @@ static int msdos_format_name(const unsigned char *name, int len,
 			if (opts->name_check != 'r' && strchr(bad_chars, c))
 				return -EINVAL;
 			if (opts->name_check == 's' &&
-			    strchr(bad_if_strict(opts), c))
+			    strchr(bad_if_strict, c))
 				return -EINVAL;
 			if (c < ' ' || c == ':' || c == '\\')
 				return -EINVAL;
@@ -243,6 +237,7 @@ static int msdos_add_entry(struct inode *dir, const unsigned char *name,
 			   int is_dir, int is_hid, int cluster,
 			   struct timespec *ts, struct fat_slot_info *sinfo)
 {
+	struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb);
 	struct msdos_dir_entry de;
 	__le16 time, date;
 	int err;
@@ -252,7 +247,7 @@ static int msdos_add_entry(struct inode *dir, const unsigned char *name,
 	if (is_hid)
 		de.attr |= ATTR_HIDDEN;
 	de.lcase = 0;
-	fat_date_unix2dos(ts->tv_sec, &time, &date);
+	fat_date_unix2dos(ts->tv_sec, &time, &date, sbi->options.tz_utc);
 	de.cdate = de.adate = 0;
 	de.ctime = 0;
 	de.ctime_cs = 0;
diff --git a/fs/namei.c b/fs/namei.c
index 01e67dddcc3d..a7b0a0b80128 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -31,7 +31,6 @@
 #include <linux/file.h>
 #include <linux/fcntl.h>
 #include <linux/device_cgroup.h>
-#include <asm/namei.h>
 #include <asm/uaccess.h>
 
 #define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
@@ -185,6 +184,8 @@ int generic_permission(struct inode *inode, int mask,
 {
 	umode_t			mode = inode->i_mode;
 
+	mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
+
 	if (current->fsuid == inode->i_uid)
 		mode >>= 6;
 	else {
@@ -203,7 +204,7 @@ int generic_permission(struct inode *inode, int mask,
 	/*
 	 * If the DACs are ok we don't need any capability check.
 	 */
-	if (((mode & mask & (MAY_READ|MAY_WRITE|MAY_EXEC)) == mask))
+	if ((mask & ~mode) == 0)
 		return 0;
 
  check_capabilities:
@@ -226,13 +227,9 @@ int generic_permission(struct inode *inode, int mask,
 	return -EACCES;
 }
 
-int permission(struct inode *inode, int mask, struct nameidata *nd)
+int inode_permission(struct inode *inode, int mask)
 {
-	int retval, submask;
-	struct vfsmount *mnt = NULL;
-
-	if (nd)
-		mnt = nd->path.mnt;
+	int retval;
 
 	if (mask & MAY_WRITE) {
 		umode_t mode = inode->i_mode;
@@ -251,19 +248,9 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
 			return -EACCES;
 	}
 
-	if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
-		/*
-		 * MAY_EXEC on regular files is denied if the fs is mounted
-		 * with the "noexec" flag.
-		 */
-		if (mnt && (mnt->mnt_flags & MNT_NOEXEC))
-			return -EACCES;
-	}
-
 	/* Ordinary permission routines do not understand MAY_APPEND. */
-	submask = mask & ~MAY_APPEND;
 	if (inode->i_op && inode->i_op->permission) {
-		retval = inode->i_op->permission(inode, submask, nd);
+		retval = inode->i_op->permission(inode, mask);
 		if (!retval) {
 			/*
 			 * Exec permission on a regular file is denied if none
@@ -277,7 +264,7 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
 				return -EACCES;
 		}
 	} else {
-		retval = generic_permission(inode, submask, NULL);
+		retval = generic_permission(inode, mask, NULL);
 	}
 	if (retval)
 		return retval;
@@ -286,7 +273,8 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
 	if (retval)
 		return retval;
 
-	return security_inode_permission(inode, mask, nd);
+	return security_inode_permission(inode,
+			mask & (MAY_READ|MAY_WRITE|MAY_EXEC));
 }
 
 /**
@@ -301,7 +289,7 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
  */
 int vfs_permission(struct nameidata *nd, int mask)
 {
-	return permission(nd->path.dentry->d_inode, mask, nd);
+	return inode_permission(nd->path.dentry->d_inode, mask);
 }
 
 /**
@@ -318,7 +306,7 @@ int vfs_permission(struct nameidata *nd, int mask)
  */
 int file_permission(struct file *file, int mask)
 {
-	return permission(file->f_path.dentry->d_inode, mask, NULL);
+	return inode_permission(file->f_path.dentry->d_inode, mask);
 }
 
 /*
@@ -459,8 +447,7 @@ static struct dentry * cached_lookup(struct dentry * parent, struct qstr * name,
  * short-cut DAC fails, then call permission() to do more
  * complete permission check.
  */
-static int exec_permission_lite(struct inode *inode,
-				       struct nameidata *nd)
+static int exec_permission_lite(struct inode *inode)
 {
 	umode_t	mode = inode->i_mode;
 
@@ -486,7 +473,7 @@ static int exec_permission_lite(struct inode *inode,
 
 	return -EACCES;
 ok:
-	return security_inode_permission(inode, MAY_EXEC, nd);
+	return security_inode_permission(inode, MAY_EXEC);
 }
 
 /*
@@ -519,7 +506,14 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
 	 */
 	result = d_lookup(parent, name);
 	if (!result) {
-		struct dentry * dentry = d_alloc(parent, name);
+		struct dentry *dentry;
+
+		/* Don't create child dentry for a dead directory. */
+		result = ERR_PTR(-ENOENT);
+		if (IS_DEADDIR(dir))
+			goto out_unlock;
+
+		dentry = d_alloc(parent, name);
 		result = ERR_PTR(-ENOMEM);
 		if (dentry) {
 			result = dir->i_op->lookup(dir, dentry, nd);
@@ -528,6 +522,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
 			else
 				result = dentry;
 		}
+out_unlock:
 		mutex_unlock(&dir->i_mutex);
 		return result;
 	}
@@ -545,27 +540,16 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
 	return result;
 }
 
-static int __emul_lookup_dentry(const char *, struct nameidata *);
-
 /* SMP-safe */
-static __always_inline int
+static __always_inline void
 walk_init_root(const char *name, struct nameidata *nd)
 {
 	struct fs_struct *fs = current->fs;
 
 	read_lock(&fs->lock);
-	if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
-		nd->path = fs->altroot;
-		path_get(&fs->altroot);
-		read_unlock(&fs->lock);
-		if (__emul_lookup_dentry(name,nd))
-			return 0;
-		read_lock(&fs->lock);
-	}
 	nd->path = fs->root;
 	path_get(&fs->root);
 	read_unlock(&fs->lock);
-	return 1;
 }
 
 /*
@@ -606,12 +590,9 @@ static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *l
 
 	if (*link == '/') {
 		path_put(&nd->path);
-		if (!walk_init_root(link, nd))
-			/* weird __emul_prefix() stuff did it */
-			goto out;
+		walk_init_root(link, nd);
 	}
 	res = link_path_walk(link, nd);
-out:
 	if (nd->depth || res || nd->last_type!=LAST_NORM)
 		return res;
 	/*
@@ -889,7 +870,7 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
 		unsigned int c;
 
 		nd->flags |= LOOKUP_CONTINUE;
-		err = exec_permission_lite(inode, nd);
+		err = exec_permission_lite(inode);
 		if (err == -EAGAIN)
 			err = vfs_permission(nd, MAY_EXEC);
  		if (err)
@@ -1060,67 +1041,6 @@ static int path_walk(const char *name, struct nameidata *nd)
 	return link_path_walk(name, nd);
 }
 
-/* 
- * SMP-safe: Returns 1 and nd will have valid dentry and mnt, if
- * everything is done. Returns 0 and drops input nd, if lookup failed;
- */
-static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
-{
-	if (path_walk(name, nd))
-		return 0;		/* something went wrong... */
-
-	if (!nd->path.dentry->d_inode ||
-	    S_ISDIR(nd->path.dentry->d_inode->i_mode)) {
-		struct path old_path = nd->path;
-		struct qstr last = nd->last;
-		int last_type = nd->last_type;
-		struct fs_struct *fs = current->fs;
-
-		/*
-		 * NAME was not found in alternate root or it's a directory.
-		 * Try to find it in the normal root:
-		 */
-		nd->last_type = LAST_ROOT;
-		read_lock(&fs->lock);
-		nd->path = fs->root;
-		path_get(&fs->root);
-		read_unlock(&fs->lock);
-		if (path_walk(name, nd) == 0) {
-			if (nd->path.dentry->d_inode) {
-				path_put(&old_path);
-				return 1;
-			}
-			path_put(&nd->path);
-		}
-		nd->path = old_path;
-		nd->last = last;
-		nd->last_type = last_type;
-	}
-	return 1;
-}
-
-void set_fs_altroot(void)
-{
-	char *emul = __emul_prefix();
-	struct nameidata nd;
-	struct path path = {}, old_path;
-	int err;
-	struct fs_struct *fs = current->fs;
-
-	if (!emul)
-		goto set_it;
-	err = path_lookup(emul, LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_NOALT, &nd);
-	if (!err)
-		path = nd.path;
-set_it:
-	write_lock(&fs->lock);
-	old_path = fs->altroot;
-	fs->altroot = path;
-	write_unlock(&fs->lock);
-	if (old_path.dentry)
-		path_put(&old_path);
-}
-
 /* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
 static int do_path_lookup(int dfd, const char *name,
 				unsigned int flags, struct nameidata *nd)
@@ -1136,14 +1056,6 @@ static int do_path_lookup(int dfd, const char *name,
 
 	if (*name=='/') {
 		read_lock(&fs->lock);
-		if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
-			nd->path = fs->altroot;
-			path_get(&fs->altroot);
-			read_unlock(&fs->lock);
-			if (__emul_lookup_dentry(name,nd))
-				goto out; /* found in altroot */
-			read_lock(&fs->lock);
-		}
 		nd->path = fs->root;
 		path_get(&fs->root);
 		read_unlock(&fs->lock);
@@ -1177,7 +1089,6 @@ static int do_path_lookup(int dfd, const char *name,
 	}
 
 	retval = path_walk(name, nd);
-out:
 	if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
 				nd->path.dentry->d_inode))
 		audit_inode(name, nd->path.dentry);
@@ -1282,19 +1193,6 @@ static int path_lookup_create(int dfd, const char *name,
 			nd, open_flags, create_mode);
 }
 
-int __user_path_lookup_open(const char __user *name, unsigned int lookup_flags,
-		struct nameidata *nd, int open_flags)
-{
-	char *tmp = getname(name);
-	int err = PTR_ERR(tmp);
-
-	if (!IS_ERR(tmp)) {
-		err = __path_lookup_intent_open(AT_FDCWD, tmp, lookup_flags, nd, open_flags, 0);
-		putname(tmp);
-	}
-	return err;
-}
-
 static struct dentry *__lookup_hash(struct qstr *name,
 		struct dentry *base, struct nameidata *nd)
 {
@@ -1317,7 +1215,14 @@ static struct dentry *__lookup_hash(struct qstr *name,
 
 	dentry = cached_lookup(base, name, nd);
 	if (!dentry) {
-		struct dentry *new = d_alloc(base, name);
+		struct dentry *new;
+
+		/* Don't create child dentry for a dead directory. */
+		dentry = ERR_PTR(-ENOENT);
+		if (IS_DEADDIR(inode))
+			goto out;
+
+		new = d_alloc(base, name);
 		dentry = ERR_PTR(-ENOMEM);
 		if (!new)
 			goto out;
@@ -1340,7 +1245,7 @@ static struct dentry *lookup_hash(struct nameidata *nd)
 {
 	int err;
 
-	err = permission(nd->path.dentry->d_inode, MAY_EXEC, nd);
+	err = inode_permission(nd->path.dentry->d_inode, MAY_EXEC);
 	if (err)
 		return ERR_PTR(err);
 	return __lookup_hash(&nd->last, nd->path.dentry, nd);
@@ -1388,7 +1293,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
 	if (err)
 		return ERR_PTR(err);
 
-	err = permission(base->d_inode, MAY_EXEC, NULL);
+	err = inode_permission(base->d_inode, MAY_EXEC);
 	if (err)
 		return ERR_PTR(err);
 	return __lookup_hash(&this, base, NULL);
@@ -1416,22 +1321,40 @@ struct dentry *lookup_one_noperm(const char *name, struct dentry *base)
 	return __lookup_hash(&this, base, NULL);
 }
 
-int __user_walk_fd(int dfd, const char __user *name, unsigned flags,
-			    struct nameidata *nd)
+int user_path_at(int dfd, const char __user *name, unsigned flags,
+		 struct path *path)
 {
+	struct nameidata nd;
 	char *tmp = getname(name);
 	int err = PTR_ERR(tmp);
-
 	if (!IS_ERR(tmp)) {
-		err = do_path_lookup(dfd, tmp, flags, nd);
+
+		BUG_ON(flags & LOOKUP_PARENT);
+
+		err = do_path_lookup(dfd, tmp, flags, &nd);
 		putname(tmp);
+		if (!err)
+			*path = nd.path;
 	}
 	return err;
 }
 
-int __user_walk(const char __user *name, unsigned flags, struct nameidata *nd)
+static int user_path_parent(int dfd, const char __user *path,
+			struct nameidata *nd, char **name)
 {
-	return __user_walk_fd(AT_FDCWD, name, flags, nd);
+	char *s = getname(path);
+	int error;
+
+	if (IS_ERR(s))
+		return PTR_ERR(s);
+
+	error = do_path_lookup(dfd, s, LOOKUP_PARENT, nd);
+	if (error)
+		putname(s);
+	else
+		*name = s;
+
+	return error;
 }
 
 /*
@@ -1478,7 +1401,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int isdir)
 	BUG_ON(victim->d_parent->d_inode != dir);
 	audit_inode_child(victim->d_name.name, victim, dir);
 
-	error = permission(dir,MAY_WRITE | MAY_EXEC, NULL);
+	error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
 	if (error)
 		return error;
 	if (IS_APPEND(dir))
@@ -1515,7 +1438,7 @@ static inline int may_create(struct inode *dir, struct dentry *child,
 		return -EEXIST;
 	if (IS_DEADDIR(dir))
 		return -ENOENT;
-	return permission(dir,MAY_WRITE | MAY_EXEC, nd);
+	return inode_permission(dir, MAY_WRITE | MAY_EXEC);
 }
 
 /* 
@@ -1755,7 +1678,7 @@ struct file *do_filp_open(int dfd, const char *pathname,
 	int will_write;
 	int flag = open_to_namei_flags(open_flag);
 
-	acc_mode = ACC_MODE(flag);
+	acc_mode = MAY_OPEN | ACC_MODE(flag);
 
 	/* O_TRUNC implies we need access checks for write permissions */
 	if (flag & O_TRUNC)
@@ -2071,20 +1994,18 @@ static int may_mknod(mode_t mode)
 asmlinkage long sys_mknodat(int dfd, const char __user *filename, int mode,
 				unsigned dev)
 {
-	int error = 0;
-	char * tmp;
-	struct dentry * dentry;
+	int error;
+	char *tmp;
+	struct dentry *dentry;
 	struct nameidata nd;
 
 	if (S_ISDIR(mode))
 		return -EPERM;
-	tmp = getname(filename);
-	if (IS_ERR(tmp))
-		return PTR_ERR(tmp);
 
-	error = do_path_lookup(dfd, tmp, LOOKUP_PARENT, &nd);
+	error = user_path_parent(dfd, filename, &nd, &tmp);
 	if (error)
-		goto out;
+		return error;
+
 	dentry = lookup_create(&nd, 0);
 	if (IS_ERR(dentry)) {
 		error = PTR_ERR(dentry);
@@ -2116,7 +2037,6 @@ out_dput:
 out_unlock:
 	mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 	path_put(&nd.path);
-out:
 	putname(tmp);
 
 	return error;
@@ -2156,14 +2076,10 @@ asmlinkage long sys_mkdirat(int dfd, const char __user *pathname, int mode)
 	struct dentry *dentry;
 	struct nameidata nd;
 
-	tmp = getname(pathname);
-	error = PTR_ERR(tmp);
-	if (IS_ERR(tmp))
+	error = user_path_parent(dfd, pathname, &nd, &tmp);
+	if (error)
 		goto out_err;
 
-	error = do_path_lookup(dfd, tmp, LOOKUP_PARENT, &nd);
-	if (error)
-		goto out;
 	dentry = lookup_create(&nd, 1);
 	error = PTR_ERR(dentry);
 	if (IS_ERR(dentry))
@@ -2181,7 +2097,6 @@ out_dput:
 out_unlock:
 	mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 	path_put(&nd.path);
-out:
 	putname(tmp);
 out_err:
 	return error;
@@ -2259,13 +2174,9 @@ static long do_rmdir(int dfd, const char __user *pathname)
 	struct dentry *dentry;
 	struct nameidata nd;
 
-	name = getname(pathname);
-	if(IS_ERR(name))
-		return PTR_ERR(name);
-
-	error = do_path_lookup(dfd, name, LOOKUP_PARENT, &nd);
+	error = user_path_parent(dfd, pathname, &nd, &name);
 	if (error)
-		goto exit;
+		return error;
 
 	switch(nd.last_type) {
 		case LAST_DOTDOT:
@@ -2294,7 +2205,6 @@ exit2:
 	mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 exit1:
 	path_put(&nd.path);
-exit:
 	putname(name);
 	return error;
 }
@@ -2343,19 +2253,16 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
  */
 static long do_unlinkat(int dfd, const char __user *pathname)
 {
-	int error = 0;
-	char * name;
+	int error;
+	char *name;
 	struct dentry *dentry;
 	struct nameidata nd;
 	struct inode *inode = NULL;
 
-	name = getname(pathname);
-	if(IS_ERR(name))
-		return PTR_ERR(name);
-
-	error = do_path_lookup(dfd, name, LOOKUP_PARENT, &nd);
+	error = user_path_parent(dfd, pathname, &nd, &name);
 	if (error)
-		goto exit;
+		return error;
+
 	error = -EISDIR;
 	if (nd.last_type != LAST_NORM)
 		goto exit1;
@@ -2382,7 +2289,6 @@ static long do_unlinkat(int dfd, const char __user *pathname)
 		iput(inode);	/* truncate the inode here */
 exit1:
 	path_put(&nd.path);
-exit:
 	putname(name);
 	return error;
 
@@ -2408,7 +2314,7 @@ asmlinkage long sys_unlink(const char __user *pathname)
 	return do_unlinkat(AT_FDCWD, pathname);
 }
 
-int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname, int mode)
+int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname)
 {
 	int error = may_create(dir, dentry, NULL);
 
@@ -2432,23 +2338,20 @@ int vfs_symlink(struct inode *dir, struct dentry *dentry, const char *oldname, i
 asmlinkage long sys_symlinkat(const char __user *oldname,
 			      int newdfd, const char __user *newname)
 {
-	int error = 0;
-	char * from;
-	char * to;
+	int error;
+	char *from;
+	char *to;
 	struct dentry *dentry;
 	struct nameidata nd;
 
 	from = getname(oldname);
-	if(IS_ERR(from))
+	if (IS_ERR(from))
 		return PTR_ERR(from);
-	to = getname(newname);
-	error = PTR_ERR(to);
-	if (IS_ERR(to))
-		goto out_putname;
 
-	error = do_path_lookup(newdfd, to, LOOKUP_PARENT, &nd);
+	error = user_path_parent(newdfd, newname, &nd, &to);
 	if (error)
-		goto out;
+		goto out_putname;
+
 	dentry = lookup_create(&nd, 0);
 	error = PTR_ERR(dentry);
 	if (IS_ERR(dentry))
@@ -2457,14 +2360,13 @@ asmlinkage long sys_symlinkat(const char __user *oldname,
 	error = mnt_want_write(nd.path.mnt);
 	if (error)
 		goto out_dput;
-	error = vfs_symlink(nd.path.dentry->d_inode, dentry, from, S_IALLUGO);
+	error = vfs_symlink(nd.path.dentry->d_inode, dentry, from);
 	mnt_drop_write(nd.path.mnt);
 out_dput:
 	dput(dentry);
 out_unlock:
 	mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 	path_put(&nd.path);
-out:
 	putname(to);
 out_putname:
 	putname(from);
@@ -2498,19 +2400,19 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
 		return -EPERM;
 	if (!dir->i_op || !dir->i_op->link)
 		return -EPERM;
-	if (S_ISDIR(old_dentry->d_inode->i_mode))
+	if (S_ISDIR(inode->i_mode))
 		return -EPERM;
 
 	error = security_inode_link(old_dentry, dir, new_dentry);
 	if (error)
 		return error;
 
-	mutex_lock(&old_dentry->d_inode->i_mutex);
+	mutex_lock(&inode->i_mutex);
 	DQUOT_INIT(dir);
 	error = dir->i_op->link(old_dentry, dir, new_dentry);
-	mutex_unlock(&old_dentry->d_inode->i_mutex);
+	mutex_unlock(&inode->i_mutex);
 	if (!error)
-		fsnotify_link(dir, old_dentry->d_inode, new_dentry);
+		fsnotify_link(dir, inode, new_dentry);
 	return error;
 }
 
@@ -2528,27 +2430,25 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
 			   int flags)
 {
 	struct dentry *new_dentry;
-	struct nameidata nd, old_nd;
+	struct nameidata nd;
+	struct path old_path;
 	int error;
-	char * to;
+	char *to;
 
 	if ((flags & ~AT_SYMLINK_FOLLOW) != 0)
 		return -EINVAL;
 
-	to = getname(newname);
-	if (IS_ERR(to))
-		return PTR_ERR(to);
-
-	error = __user_walk_fd(olddfd, oldname,
-			       flags & AT_SYMLINK_FOLLOW ? LOOKUP_FOLLOW : 0,
-			       &old_nd);
+	error = user_path_at(olddfd, oldname,
+			     flags & AT_SYMLINK_FOLLOW ? LOOKUP_FOLLOW : 0,
+			     &old_path);
 	if (error)
-		goto exit;
-	error = do_path_lookup(newdfd, to, LOOKUP_PARENT, &nd);
+		return error;
+
+	error = user_path_parent(newdfd, newname, &nd, &to);
 	if (error)
 		goto out;
 	error = -EXDEV;
-	if (old_nd.path.mnt != nd.path.mnt)
+	if (old_path.mnt != nd.path.mnt)
 		goto out_release;
 	new_dentry = lookup_create(&nd, 0);
 	error = PTR_ERR(new_dentry);
@@ -2557,7 +2457,7 @@ asmlinkage long sys_linkat(int olddfd, const char __user *oldname,
 	error = mnt_want_write(nd.path.mnt);
 	if (error)
 		goto out_dput;
-	error = vfs_link(old_nd.path.dentry, nd.path.dentry->d_inode, new_dentry);
+	error = vfs_link(old_path.dentry, nd.path.dentry->d_inode, new_dentry);
 	mnt_drop_write(nd.path.mnt);
 out_dput:
 	dput(new_dentry);
@@ -2565,10 +2465,9 @@ out_unlock:
 	mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
 out_release:
 	path_put(&nd.path);
-out:
-	path_put(&old_nd.path);
-exit:
 	putname(to);
+out:
+	path_put(&old_path);
 
 	return error;
 }
@@ -2621,7 +2520,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
 	 * we'll need to flip '..'.
 	 */
 	if (new_dir != old_dir) {
-		error = permission(old_dentry->d_inode, MAY_WRITE, NULL);
+		error = inode_permission(old_dentry->d_inode, MAY_WRITE);
 		if (error)
 			return error;
 	}
@@ -2724,20 +2623,22 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	return error;
 }
 
-static int do_rename(int olddfd, const char *oldname,
-			int newdfd, const char *newname)
+asmlinkage long sys_renameat(int olddfd, const char __user *oldname,
+			     int newdfd, const char __user *newname)
 {
-	int error = 0;
-	struct dentry * old_dir, * new_dir;
-	struct dentry * old_dentry, *new_dentry;
-	struct dentry * trap;
+	struct dentry *old_dir, *new_dir;
+	struct dentry *old_dentry, *new_dentry;
+	struct dentry *trap;
 	struct nameidata oldnd, newnd;
+	char *from;
+	char *to;
+	int error;
 
-	error = do_path_lookup(olddfd, oldname, LOOKUP_PARENT, &oldnd);
+	error = user_path_parent(olddfd, oldname, &oldnd, &from);
 	if (error)
 		goto exit;
 
-	error = do_path_lookup(newdfd, newname, LOOKUP_PARENT, &newnd);
+	error = user_path_parent(newdfd, newname, &newnd, &to);
 	if (error)
 		goto exit1;
 
@@ -2799,29 +2700,11 @@ exit3:
 	unlock_rename(new_dir, old_dir);
 exit2:
 	path_put(&newnd.path);
+	putname(to);
 exit1:
 	path_put(&oldnd.path);
-exit:
-	return error;
-}
-
-asmlinkage long sys_renameat(int olddfd, const char __user *oldname,
-			     int newdfd, const char __user *newname)
-{
-	int error;
-	char * from;
-	char * to;
-
-	from = getname(oldname);
-	if(IS_ERR(from))
-		return PTR_ERR(from);
-	to = getname(newname);
-	error = PTR_ERR(to);
-	if (!IS_ERR(to)) {
-		error = do_rename(olddfd, from, newdfd, to);
-		putname(to);
-	}
 	putname(from);
+exit:
 	return error;
 }
 
@@ -2959,8 +2842,7 @@ const struct inode_operations page_symlink_inode_operations = {
 	.put_link	= page_put_link,
 };
 
-EXPORT_SYMBOL(__user_walk);
-EXPORT_SYMBOL(__user_walk_fd);
+EXPORT_SYMBOL(user_path_at);
 EXPORT_SYMBOL(follow_down);
 EXPORT_SYMBOL(follow_up);
 EXPORT_SYMBOL(get_write_access); /* binfmt_aout */
@@ -2975,7 +2857,7 @@ EXPORT_SYMBOL(page_symlink);
 EXPORT_SYMBOL(page_symlink_inode_operations);
 EXPORT_SYMBOL(path_lookup);
 EXPORT_SYMBOL(vfs_path_lookup);
-EXPORT_SYMBOL(permission);
+EXPORT_SYMBOL(inode_permission);
 EXPORT_SYMBOL(vfs_permission);
 EXPORT_SYMBOL(file_permission);
 EXPORT_SYMBOL(unlock_rename);
diff --git a/fs/namespace.c b/fs/namespace.c
index 4f6f7635b59c..411728c0c8bb 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -112,9 +112,13 @@ struct vfsmount *alloc_vfsmnt(const char *name)
 		int err;
 
 		err = mnt_alloc_id(mnt);
-		if (err) {
-			kmem_cache_free(mnt_cache, mnt);
-			return NULL;
+		if (err)
+			goto out_free_cache;
+
+		if (name) {
+			mnt->mnt_devname = kstrdup(name, GFP_KERNEL);
+			if (!mnt->mnt_devname)
+				goto out_free_id;
 		}
 
 		atomic_set(&mnt->mnt_count, 1);
@@ -127,16 +131,14 @@ struct vfsmount *alloc_vfsmnt(const char *name)
 		INIT_LIST_HEAD(&mnt->mnt_slave_list);
 		INIT_LIST_HEAD(&mnt->mnt_slave);
 		atomic_set(&mnt->__mnt_writers, 0);
-		if (name) {
-			int size = strlen(name) + 1;
-			char *newname = kmalloc(size, GFP_KERNEL);
-			if (newname) {
-				memcpy(newname, name, size);
-				mnt->mnt_devname = newname;
-			}
-		}
 	}
 	return mnt;
+
+out_free_id:
+	mnt_free_id(mnt);
+out_free_cache:
+	kmem_cache_free(mnt_cache, mnt);
+	return NULL;
 }
 
 /*
@@ -309,10 +311,9 @@ static void handle_write_count_underflow(struct vfsmount *mnt)
 	 */
 	if ((atomic_read(&mnt->__mnt_writers) < 0) &&
 	    !(mnt->mnt_flags & MNT_IMBALANCED_WRITE_COUNT)) {
-		printk(KERN_DEBUG "leak detected on mount(%p) writers "
+		WARN(1, KERN_DEBUG "leak detected on mount(%p) writers "
 				"count: %d\n",
 			mnt, atomic_read(&mnt->__mnt_writers));
-		WARN_ON(1);
 		/* use the flag to keep the dmesg spam down */
 		mnt->mnt_flags |= MNT_IMBALANCED_WRITE_COUNT;
 	}
@@ -1129,27 +1130,27 @@ static int do_umount(struct vfsmount *mnt, int flags)
 
 asmlinkage long sys_umount(char __user * name, int flags)
 {
-	struct nameidata nd;
+	struct path path;
 	int retval;
 
-	retval = __user_walk(name, LOOKUP_FOLLOW, &nd);
+	retval = user_path(name, &path);
 	if (retval)
 		goto out;
 	retval = -EINVAL;
-	if (nd.path.dentry != nd.path.mnt->mnt_root)
+	if (path.dentry != path.mnt->mnt_root)
 		goto dput_and_out;
-	if (!check_mnt(nd.path.mnt))
+	if (!check_mnt(path.mnt))
 		goto dput_and_out;
 
 	retval = -EPERM;
 	if (!capable(CAP_SYS_ADMIN))
 		goto dput_and_out;
 
-	retval = do_umount(nd.path.mnt, flags);
+	retval = do_umount(path.mnt, flags);
 dput_and_out:
 	/* we mustn't call path_put() as that would clear mnt_expiry_mark */
-	dput(nd.path.dentry);
-	mntput_no_expire(nd.path.mnt);
+	dput(path.dentry);
+	mntput_no_expire(path.mnt);
 out:
 	return retval;
 }
@@ -1973,7 +1974,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
 		struct fs_struct *fs)
 {
 	struct mnt_namespace *new_ns;
-	struct vfsmount *rootmnt = NULL, *pwdmnt = NULL, *altrootmnt = NULL;
+	struct vfsmount *rootmnt = NULL, *pwdmnt = NULL;
 	struct vfsmount *p, *q;
 
 	new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
@@ -2016,10 +2017,6 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
 				pwdmnt = p;
 				fs->pwd.mnt = mntget(q);
 			}
-			if (p == fs->altroot.mnt) {
-				altrootmnt = p;
-				fs->altroot.mnt = mntget(q);
-			}
 		}
 		p = next_mnt(p, mnt_ns->root);
 		q = next_mnt(q, new_ns->root);
@@ -2030,8 +2027,6 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
 		mntput(rootmnt);
 	if (pwdmnt)
 		mntput(pwdmnt);
-	if (altrootmnt)
-		mntput(altrootmnt);
 
 	return new_ns;
 }
@@ -2184,28 +2179,26 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
 			       const char __user * put_old)
 {
 	struct vfsmount *tmp;
-	struct nameidata new_nd, old_nd;
-	struct path parent_path, root_parent, root;
+	struct path new, old, parent_path, root_parent, root;
 	int error;
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-	error = __user_walk(new_root, LOOKUP_FOLLOW | LOOKUP_DIRECTORY,
-			    &new_nd);
+	error = user_path_dir(new_root, &new);
 	if (error)
 		goto out0;
 	error = -EINVAL;
-	if (!check_mnt(new_nd.path.mnt))
+	if (!check_mnt(new.mnt))
 		goto out1;
 
-	error = __user_walk(put_old, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &old_nd);
+	error = user_path_dir(put_old, &old);
 	if (error)
 		goto out1;
 
-	error = security_sb_pivotroot(&old_nd.path, &new_nd.path);
+	error = security_sb_pivotroot(&old, &new);
 	if (error) {
-		path_put(&old_nd.path);
+		path_put(&old);
 		goto out1;
 	}
 
@@ -2214,69 +2207,69 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
 	path_get(&current->fs->root);
 	read_unlock(&current->fs->lock);
 	down_write(&namespace_sem);
-	mutex_lock(&old_nd.path.dentry->d_inode->i_mutex);
+	mutex_lock(&old.dentry->d_inode->i_mutex);
 	error = -EINVAL;
-	if (IS_MNT_SHARED(old_nd.path.mnt) ||
-		IS_MNT_SHARED(new_nd.path.mnt->mnt_parent) ||
+	if (IS_MNT_SHARED(old.mnt) ||
+		IS_MNT_SHARED(new.mnt->mnt_parent) ||
 		IS_MNT_SHARED(root.mnt->mnt_parent))
 		goto out2;
 	if (!check_mnt(root.mnt))
 		goto out2;
 	error = -ENOENT;
-	if (IS_DEADDIR(new_nd.path.dentry->d_inode))
+	if (IS_DEADDIR(new.dentry->d_inode))
 		goto out2;
-	if (d_unhashed(new_nd.path.dentry) && !IS_ROOT(new_nd.path.dentry))
+	if (d_unhashed(new.dentry) && !IS_ROOT(new.dentry))
 		goto out2;
-	if (d_unhashed(old_nd.path.dentry) && !IS_ROOT(old_nd.path.dentry))
+	if (d_unhashed(old.dentry) && !IS_ROOT(old.dentry))
 		goto out2;
 	error = -EBUSY;
-	if (new_nd.path.mnt == root.mnt ||
-	    old_nd.path.mnt == root.mnt)
+	if (new.mnt == root.mnt ||
+	    old.mnt == root.mnt)
 		goto out2; /* loop, on the same file system  */
 	error = -EINVAL;
 	if (root.mnt->mnt_root != root.dentry)
 		goto out2; /* not a mountpoint */
 	if (root.mnt->mnt_parent == root.mnt)
 		goto out2; /* not attached */
-	if (new_nd.path.mnt->mnt_root != new_nd.path.dentry)
+	if (new.mnt->mnt_root != new.dentry)
 		goto out2; /* not a mountpoint */
-	if (new_nd.path.mnt->mnt_parent == new_nd.path.mnt)
+	if (new.mnt->mnt_parent == new.mnt)
 		goto out2; /* not attached */
 	/* make sure we can reach put_old from new_root */
-	tmp = old_nd.path.mnt;
+	tmp = old.mnt;
 	spin_lock(&vfsmount_lock);
-	if (tmp != new_nd.path.mnt) {
+	if (tmp != new.mnt) {
 		for (;;) {
 			if (tmp->mnt_parent == tmp)
 				goto out3; /* already mounted on put_old */
-			if (tmp->mnt_parent == new_nd.path.mnt)
+			if (tmp->mnt_parent == new.mnt)
 				break;
 			tmp = tmp->mnt_parent;
 		}
-		if (!is_subdir(tmp->mnt_mountpoint, new_nd.path.dentry))
+		if (!is_subdir(tmp->mnt_mountpoint, new.dentry))
 			goto out3;
-	} else if (!is_subdir(old_nd.path.dentry, new_nd.path.dentry))
+	} else if (!is_subdir(old.dentry, new.dentry))
 		goto out3;
-	detach_mnt(new_nd.path.mnt, &parent_path);
+	detach_mnt(new.mnt, &parent_path);
 	detach_mnt(root.mnt, &root_parent);
 	/* mount old root on put_old */
-	attach_mnt(root.mnt, &old_nd.path);
+	attach_mnt(root.mnt, &old);
 	/* mount new_root on / */
-	attach_mnt(new_nd.path.mnt, &root_parent);
+	attach_mnt(new.mnt, &root_parent);
 	touch_mnt_namespace(current->nsproxy->mnt_ns);
 	spin_unlock(&vfsmount_lock);
-	chroot_fs_refs(&root, &new_nd.path);
-	security_sb_post_pivotroot(&root, &new_nd.path);
+	chroot_fs_refs(&root, &new);
+	security_sb_post_pivotroot(&root, &new);
 	error = 0;
 	path_put(&root_parent);
 	path_put(&parent_path);
 out2:
-	mutex_unlock(&old_nd.path.dentry->d_inode->i_mutex);
+	mutex_unlock(&old.dentry->d_inode->i_mutex);
 	up_write(&namespace_sem);
 	path_put(&root);
-	path_put(&old_nd.path);
+	path_put(&old);
 out1:
-	path_put(&new_nd.path);
+	path_put(&new);
 out0:
 	return error;
 out3:
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index 011ef0b6d2d4..07e9715b8658 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -266,7 +266,7 @@ leave_me:;
 
 
 static int
-__ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd)
+__ncp_lookup_validate(struct dentry *dentry)
 {
 	struct ncp_server *server;
 	struct dentry *parent;
@@ -340,7 +340,7 @@ ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd)
 {
 	int res;
 	lock_kernel();
-	res = __ncp_lookup_validate(dentry, nd);
+	res = __ncp_lookup_validate(dentry);
 	unlock_kernel();
 	return res;
 }
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 2e5ab1204dec..d642f0e5b365 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -64,7 +64,7 @@ static void ncp_destroy_inode(struct inode *inode)
 	kmem_cache_free(ncp_inode_cachep, NCP_FINFO(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct ncp_inode_info *ei = (struct ncp_inode_info *) foo;
 
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 28a238dab23a..74f92b717f78 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1884,7 +1884,7 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
 		return status;
 	nfs_access_add_cache(inode, &cache);
 out:
-	if ((cache.mask & mask) == mask)
+	if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
 		return 0;
 	return -EACCES;
 }
@@ -1907,17 +1907,17 @@ int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags)
 	return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags));
 }
 
-int nfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int nfs_permission(struct inode *inode, int mask)
 {
 	struct rpc_cred *cred;
 	int res = 0;
 
 	nfs_inc_stats(inode, NFSIOS_VFSACCESS);
 
-	if (mask == 0)
+	if ((mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
 		goto out;
 	/* Is this sys_access() ? */
-	if (nd != NULL && (nd->flags & LOOKUP_ACCESS))
+	if (mask & MAY_ACCESS)
 		goto force_lookup;
 
 	switch (inode->i_mode & S_IFMT) {
@@ -1926,8 +1926,7 @@ int nfs_permission(struct inode *inode, int mask, struct nameidata *nd)
 		case S_IFREG:
 			/* NFSv4 has atomic_open... */
 			if (nfs_server_capable(inode, NFS_CAP_ATOMIC_OPEN)
-					&& nd != NULL
-					&& (nd->flags & LOOKUP_OPEN))
+					&& (mask & MAY_OPEN))
 				goto out;
 			break;
 		case S_IFDIR:
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index df23f987da6b..52daefa2f521 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1242,7 +1242,7 @@ static inline void nfs4_init_once(struct nfs_inode *nfsi)
 #endif
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct nfs_inode *nfsi = (struct nfs_inode *) foo;
 
diff --git a/fs/nfs/nfsroot.c b/fs/nfs/nfsroot.c
index 46763d1cd397..8478fc25daee 100644
--- a/fs/nfs/nfsroot.c
+++ b/fs/nfs/nfsroot.c
@@ -127,7 +127,7 @@ enum {
 	Opt_err
 };
 
-static match_table_t __initdata tokens = {
+static match_table_t __initconst tokens = {
 	{Opt_port, "port=%u"},
 	{Opt_rsize, "rsize=%u"},
 	{Opt_wsize, "wsize=%u"},
diff --git a/fs/nfsd/lockd.c b/fs/nfsd/lockd.c
index 6b6225ac4926..15c6faeec77c 100644
--- a/fs/nfsd/lockd.c
+++ b/fs/nfsd/lockd.c
@@ -19,6 +19,13 @@
 
 #define NFSDDBG_FACILITY		NFSDDBG_LOCKD
 
+#ifdef CONFIG_LOCKD_V4
+#define nlm_stale_fh	nlm4_stale_fh
+#define nlm_failed	nlm4_failed
+#else
+#define nlm_stale_fh	nlm_lck_denied_nolocks
+#define nlm_failed	nlm_lck_denied_nolocks
+#endif
 /*
  * Note: we hold the dentry use count while the file is open.
  */
@@ -47,12 +54,10 @@ nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
 		return 0;
 	case nfserr_dropit:
 		return nlm_drop_reply;
-#ifdef CONFIG_LOCKD_V4
 	case nfserr_stale:
-		return nlm4_stale_fh;
-#endif
+		return nlm_stale_fh;
 	default:
-		return nlm_lck_denied;
+		return nlm_failed;
 	}
 }
 
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 1955a2702e60..c53e65f8f3a2 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -12,6 +12,7 @@
 #include <linux/time.h>
 #include <linux/errno.h>
 #include <linux/fs.h>
+#include <linux/namei.h>
 #include <linux/fcntl.h>
 #include <linux/net.h>
 #include <linux/in.h>
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index f45451eb1e38..ea37c96f0445 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -51,7 +51,7 @@ static int nfsd_acceptable(void *expv, struct dentry *dentry)
 		/* make sure parents give x permission to user */
 		int err;
 		parent = dget_parent(tdentry);
-		err = permission(parent->d_inode, MAY_EXEC, NULL);
+		err = inode_permission(parent->d_inode, MAY_EXEC);
 		if (err < 0) {
 			dput(parent);
 			break;
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 0f4481e0502d..18060bed5267 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1516,7 +1516,6 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	struct dentry	*dentry, *dnew;
 	__be32		err, cerr;
 	int		host_err;
-	umode_t		mode;
 
 	err = nfserr_noent;
 	if (!flen || !plen)
@@ -1535,11 +1534,6 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	if (IS_ERR(dnew))
 		goto out_nfserr;
 
-	mode = S_IALLUGO;
-	/* Only the MODE ATTRibute is even vaguely meaningful */
-	if (iap && (iap->ia_valid & ATTR_MODE))
-		mode = iap->ia_mode & S_IALLUGO;
-
 	host_err = mnt_want_write(fhp->fh_export->ex_path.mnt);
 	if (host_err)
 		goto out_nfserr;
@@ -1551,11 +1545,11 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
 		else {
 			strncpy(path_alloced, path, plen);
 			path_alloced[plen] = 0;
-			host_err = vfs_symlink(dentry->d_inode, dnew, path_alloced, mode);
+			host_err = vfs_symlink(dentry->d_inode, dnew, path_alloced);
 			kfree(path_alloced);
 		}
 	} else
-		host_err = vfs_symlink(dentry->d_inode, dnew, path, mode);
+		host_err = vfs_symlink(dentry->d_inode, dnew, path);
 
 	if (!host_err) {
 		if (EX_ISSYNC(fhp->fh_export))
@@ -1959,12 +1953,12 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
 		return 0;
 
 	/* This assumes  NFSD_MAY_{READ,WRITE,EXEC} == MAY_{READ,WRITE,EXEC} */
-	err = permission(inode, acc & (MAY_READ|MAY_WRITE|MAY_EXEC), NULL);
+	err = inode_permission(inode, acc & (MAY_READ|MAY_WRITE|MAY_EXEC));
 
 	/* Allow read access to binaries even when mode 111 */
 	if (err == -EACCES && S_ISREG(inode->i_mode) &&
 	    acc == (NFSD_MAY_READ | NFSD_MAY_OWNER_OVERRIDE))
-		err = permission(inode, MAY_EXEC, NULL);
+		err = inode_permission(inode, MAY_EXEC);
 
 	return err? nfserrno(err) : 0;
 }
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 3c5550cd11d6..d020866d4232 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -2118,7 +2118,7 @@ static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb,
 		goto out;
 	if (!count)
 		goto out;
-	err = remove_suid(file->f_path.dentry);
+	err = file_remove_suid(file);
 	if (err)
 		goto out;
 	file_update_time(file);
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 3e76f3b216bc..4a46743b5077 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -3080,7 +3080,7 @@ struct kmem_cache *ntfs_inode_cache;
 struct kmem_cache *ntfs_big_inode_cache;
 
 /* Init once constructor for the inode slab cache. */
-static void ntfs_big_inode_init_once(struct kmem_cache *cachep, void *foo)
+static void ntfs_big_inode_init_once(void *foo)
 {
 	ntfs_inode *ni = (ntfs_inode *)foo;
 
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlm/dlmfs.c
index e48aba698b77..533a789c3ef8 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -267,8 +267,7 @@ static ssize_t dlmfs_file_write(struct file *filp,
 	return writelen;
 }
 
-static void dlmfs_init_once(struct kmem_cache *cachep,
-			    void *foo)
+static void dlmfs_init_once(void *foo)
 {
 	struct dlmfs_inode_private *ip =
 		(struct dlmfs_inode_private *) foo;
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index e8514e8b6ce8..be2dd95d3a1d 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1176,7 +1176,7 @@ bail:
 	return err;
 }
 
-int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+int ocfs2_permission(struct inode *inode, int mask)
 {
 	int ret;
 
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 048ddcaf5c80..1e27b4d017ea 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -62,8 +62,7 @@ int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
 int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
 		  struct kstat *stat);
-int ocfs2_permission(struct inode *inode, int mask,
-		     struct nameidata *nd);
+int ocfs2_permission(struct inode *inode, int mask);
 
 int ocfs2_should_update_atime(struct inode *inode,
 			      struct vfsmount *vfsmnt);
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index ccecfe5094fa..2560b33889aa 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1118,7 +1118,7 @@ bail:
 	return status;
 }
 
-static void ocfs2_inode_init_once(struct kmem_cache *cachep, void *data)
+static void ocfs2_inode_init_once(void *data)
 {
 	struct ocfs2_inode_info *oi = data;
 
diff --git a/fs/omfs/Makefile b/fs/omfs/Makefile
new file mode 100644
index 000000000000..8b82b63f1129
--- /dev/null
+++ b/fs/omfs/Makefile
@@ -0,0 +1,4 @@
+
+obj-$(CONFIG_OMFS_FS) += omfs.o
+
+omfs-y := bitmap.o dir.o file.o inode.o
diff --git a/fs/omfs/bitmap.c b/fs/omfs/bitmap.c
new file mode 100644
index 000000000000..dc75f22be3f2
--- /dev/null
+++ b/fs/omfs/bitmap.c
@@ -0,0 +1,192 @@
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <asm/div64.h>
+#include "omfs.h"
+
+unsigned long omfs_count_free(struct super_block *sb)
+{
+	unsigned int i;
+	unsigned long sum = 0;
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+	int nbits = sb->s_blocksize * 8;
+
+	for (i = 0; i < sbi->s_imap_size; i++)
+		sum += nbits - bitmap_weight(sbi->s_imap[i], nbits);
+
+	return sum;
+}
+
+/*
+ *  Counts the run of zero bits starting at bit up to max.
+ *  It handles the case where a run might spill over a buffer.
+ *  Called with bitmap lock.
+ */
+static int count_run(unsigned long **addr, int nbits,
+		int addrlen, int bit, int max)
+{
+	int count = 0;
+	int x;
+
+	for (; addrlen > 0; addrlen--, addr++) {
+		x = find_next_bit(*addr, nbits, bit);
+		count += x - bit;
+
+		if (x < nbits || count > max)
+			return min(count, max);
+
+		bit = 0;
+	}
+	return min(count, max);
+}
+
+/*
+ * Sets or clears the run of count bits starting with bit.
+ * Called with bitmap lock.
+ */
+static int set_run(struct super_block *sb, int map,
+		int nbits, int bit, int count, int set)
+{
+	int i;
+	int err;
+	struct buffer_head *bh;
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+
+ 	err = -ENOMEM;
+	bh = sb_bread(sb, clus_to_blk(sbi, sbi->s_bitmap_ino) + map);
+	if (!bh)
+		goto out;
+
+	for (i = 0; i < count; i++, bit++) {
+		if (bit >= nbits) {
+			bit = 0;
+			map++;
+
+			mark_buffer_dirty(bh);
+			brelse(bh);
+			bh = sb_bread(sb,
+				clus_to_blk(sbi, sbi->s_bitmap_ino) + map);
+			if (!bh)
+				goto out;
+		}
+		if (set) {
+			set_bit(bit, sbi->s_imap[map]);
+			set_bit(bit, (long *) bh->b_data);
+		} else {
+			clear_bit(bit, sbi->s_imap[map]);
+			clear_bit(bit, (long *) bh->b_data);
+		}
+	}
+	mark_buffer_dirty(bh);
+	brelse(bh);
+	err = 0;
+out:
+	return err;
+}
+
+/*
+ * Tries to allocate exactly one block.  Returns true if sucessful.
+ */
+int omfs_allocate_block(struct super_block *sb, u64 block)
+{
+	struct buffer_head *bh;
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+	int bits_per_entry = 8 * sb->s_blocksize;
+	int map, bit;
+	int ret = 0;
+	u64 tmp;
+
+	tmp = block;
+	bit = do_div(tmp, bits_per_entry);
+	map = tmp;
+
+	mutex_lock(&sbi->s_bitmap_lock);
+	if (map >= sbi->s_imap_size || test_and_set_bit(bit, sbi->s_imap[map]))
+		goto out;
+
+	if (sbi->s_bitmap_ino > 0) {
+		bh = sb_bread(sb, clus_to_blk(sbi, sbi->s_bitmap_ino) + map);
+		if (!bh)
+			goto out;
+
+		set_bit(bit, (long *) bh->b_data);
+		mark_buffer_dirty(bh);
+		brelse(bh);
+	}
+	ret = 1;
+out:
+	mutex_unlock(&sbi->s_bitmap_lock);
+	return ret;
+}
+
+
+/*
+ *  Tries to allocate a set of blocks.	The request size depends on the
+ *  type: for inodes, we must allocate sbi->s_mirrors blocks, and for file
+ *  blocks, we try to allocate sbi->s_clustersize, but can always get away
+ *  with just one block.
+ */
+int omfs_allocate_range(struct super_block *sb,
+			int min_request,
+			int max_request,
+			u64 *return_block,
+			int *return_size)
+{
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+	int bits_per_entry = 8 * sb->s_blocksize;
+	int ret = 0;
+	int i, run, bit;
+
+	mutex_lock(&sbi->s_bitmap_lock);
+	for (i = 0; i < sbi->s_imap_size; i++) {
+		bit = 0;
+		while (bit < bits_per_entry) {
+			bit = find_next_zero_bit(sbi->s_imap[i], bits_per_entry,
+				bit);
+
+			if (bit == bits_per_entry)
+				break;
+
+			run = count_run(&sbi->s_imap[i], bits_per_entry,
+				sbi->s_imap_size-i, bit, max_request);
+
+			if (run >= min_request)
+				goto found;
+			bit += run;
+		}
+	}
+	ret = -ENOSPC;
+	goto out;
+
+found:
+	*return_block = i * bits_per_entry + bit;
+	*return_size = run;
+	ret = set_run(sb, i, bits_per_entry, bit, run, 1);
+
+out:
+	mutex_unlock(&sbi->s_bitmap_lock);
+	return ret;
+}
+
+/*
+ * Clears count bits starting at a given block.
+ */
+int omfs_clear_range(struct super_block *sb, u64 block, int count)
+{
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+	int bits_per_entry = 8 * sb->s_blocksize;
+	u64 tmp;
+	int map, bit, ret;
+
+	tmp = block;
+	bit = do_div(tmp, bits_per_entry);
+	map = tmp;
+
+	if (map >= sbi->s_imap_size)
+		return 0;
+
+	mutex_lock(&sbi->s_bitmap_lock);
+	ret = set_run(sb, map, bits_per_entry, bit, count, 0);
+	mutex_unlock(&sbi->s_bitmap_lock);
+	return ret;
+}
diff --git a/fs/omfs/dir.c b/fs/omfs/dir.c
new file mode 100644
index 000000000000..05a5bc31e4bd
--- /dev/null
+++ b/fs/omfs/dir.c
@@ -0,0 +1,504 @@
+/*
+ * OMFS (as used by RIO Karma) directory operations.
+ * Copyright (C) 2005 Bob Copeland <me@bobcopeland.com>
+ * Released under GPL v2.
+ */
+
+#include <linux/fs.h>
+#include <linux/ctype.h>
+#include <linux/buffer_head.h>
+#include "omfs.h"
+
+static int omfs_hash(const char *name, int namelen, int mod)
+{
+	int i, hash = 0;
+	for (i = 0; i < namelen; i++)
+		hash ^= tolower(name[i]) << (i % 24);
+	return hash % mod;
+}
+
+/*
+ * Finds the bucket for a given name and reads the containing block;
+ * *ofs is set to the offset of the first list entry.
+ */
+static struct buffer_head *omfs_get_bucket(struct inode *dir,
+		const char *name, int namelen, int *ofs)
+{
+	int nbuckets = (dir->i_size - OMFS_DIR_START)/8;
+	int block = clus_to_blk(OMFS_SB(dir->i_sb), dir->i_ino);
+	int bucket = omfs_hash(name, namelen, nbuckets);
+
+	*ofs = OMFS_DIR_START + bucket * 8;
+	return sb_bread(dir->i_sb, block);
+}
+
+static struct buffer_head *omfs_scan_list(struct inode *dir, u64 block,
+				const char *name, int namelen,
+				u64 *prev_block)
+{
+	struct buffer_head *bh;
+	struct omfs_inode *oi;
+	int err = -ENOENT;
+	*prev_block = ~0;
+
+	while (block != ~0) {
+		bh = sb_bread(dir->i_sb,
+			clus_to_blk(OMFS_SB(dir->i_sb), block));
+		if (!bh) {
+			err = -EIO;
+			goto err;
+		}
+
+		oi = (struct omfs_inode *) bh->b_data;
+		if (omfs_is_bad(OMFS_SB(dir->i_sb), &oi->i_head, block)) {
+			brelse(bh);
+			goto err;
+		}
+
+		if (strncmp(oi->i_name, name, namelen) == 0)
+			return bh;
+
+		*prev_block = block;
+		block = be64_to_cpu(oi->i_sibling);
+		brelse(bh);
+	}
+err:
+	return ERR_PTR(err);
+}
+
+static struct buffer_head *omfs_find_entry(struct inode *dir,
+					   const char *name, int namelen)
+{
+	struct buffer_head *bh;
+	int ofs;
+	u64 block, dummy;
+
+	bh = omfs_get_bucket(dir, name, namelen, &ofs);
+	if (!bh)
+		return ERR_PTR(-EIO);
+
+	block = be64_to_cpu(*((__be64 *) &bh->b_data[ofs]));
+	brelse(bh);
+
+	return omfs_scan_list(dir, block, name, namelen, &dummy);
+}
+
+int omfs_make_empty(struct inode *inode, struct super_block *sb)
+{
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+	int block = clus_to_blk(sbi, inode->i_ino);
+	struct buffer_head *bh;
+	struct omfs_inode *oi;
+
+	bh = sb_bread(sb, block);
+	if (!bh)
+		return -ENOMEM;
+
+	memset(bh->b_data, 0, sizeof(struct omfs_inode));
+
+	if (inode->i_mode & S_IFDIR) {
+		memset(&bh->b_data[OMFS_DIR_START], 0xff,
+			sbi->s_sys_blocksize - OMFS_DIR_START);
+	} else
+		omfs_make_empty_table(bh, OMFS_EXTENT_START);
+
+	oi = (struct omfs_inode *) bh->b_data;
+	oi->i_head.h_self = cpu_to_be64(inode->i_ino);
+	oi->i_sibling = ~0ULL;
+
+	mark_buffer_dirty(bh);
+	brelse(bh);
+	return 0;
+}
+
+static int omfs_add_link(struct dentry *dentry, struct inode *inode)
+{
+	struct inode *dir = dentry->d_parent->d_inode;
+	const char *name = dentry->d_name.name;
+	int namelen = dentry->d_name.len;
+	struct omfs_inode *oi;
+	struct buffer_head *bh;
+	u64 block;
+	__be64 *entry;
+	int ofs;
+
+	/* just prepend to head of queue in proper bucket */
+	bh = omfs_get_bucket(dir, name, namelen, &ofs);
+	if (!bh)
+		goto out;
+
+	entry = (__be64 *) &bh->b_data[ofs];
+	block = be64_to_cpu(*entry);
+	*entry = cpu_to_be64(inode->i_ino);
+	mark_buffer_dirty(bh);
+	brelse(bh);
+
+	/* now set the sibling and parent pointers on the new inode */
+	bh = sb_bread(dir->i_sb, clus_to_blk(OMFS_SB(dir->i_sb), inode->i_ino));
+	if (!bh)
+		goto out;
+
+	oi = (struct omfs_inode *) bh->b_data;
+	memcpy(oi->i_name, name, namelen);
+	memset(oi->i_name + namelen, 0, OMFS_NAMELEN - namelen);
+	oi->i_sibling = cpu_to_be64(block);
+	oi->i_parent = cpu_to_be64(dir->i_ino);
+	mark_buffer_dirty(bh);
+	brelse(bh);
+
+	dir->i_ctime = CURRENT_TIME_SEC;
+
+	/* mark affected inodes dirty to rebuild checksums */
+	mark_inode_dirty(dir);
+	mark_inode_dirty(inode);
+	return 0;
+out:
+	return -ENOMEM;
+}
+
+static int omfs_delete_entry(struct dentry *dentry)
+{
+	struct inode *dir = dentry->d_parent->d_inode;
+	struct inode *dirty;
+	const char *name = dentry->d_name.name;
+	int namelen = dentry->d_name.len;
+	struct omfs_inode *oi;
+	struct buffer_head *bh, *bh2;
+	__be64 *entry, next;
+	u64 block, prev;
+	int ofs;
+	int err = -ENOMEM;
+
+	/* delete the proper node in the bucket's linked list */
+	bh = omfs_get_bucket(dir, name, namelen, &ofs);
+	if (!bh)
+		goto out;
+
+	entry = (__be64 *) &bh->b_data[ofs];
+	block = be64_to_cpu(*entry);
+
+	bh2 = omfs_scan_list(dir, block, name, namelen, &prev);
+	if (IS_ERR(bh2)) {
+		err = PTR_ERR(bh2);
+		goto out_free_bh;
+	}
+
+	oi = (struct omfs_inode *) bh2->b_data;
+	next = oi->i_sibling;
+	brelse(bh2);
+
+	if (prev != ~0) {
+		/* found in middle of list, get list ptr */
+		brelse(bh);
+		bh = sb_bread(dir->i_sb,
+			clus_to_blk(OMFS_SB(dir->i_sb), prev));
+		if (!bh)
+			goto out;
+
+		oi = (struct omfs_inode *) bh->b_data;
+		entry = &oi->i_sibling;
+	}
+
+	*entry = next;
+	mark_buffer_dirty(bh);
+
+	if (prev != ~0) {
+		dirty = omfs_iget(dir->i_sb, prev);
+		if (!IS_ERR(dirty)) {
+			mark_inode_dirty(dirty);
+			iput(dirty);
+		}
+	}
+
+	err = 0;
+out_free_bh:
+	brelse(bh);
+out:
+	return err;
+}
+
+static int omfs_dir_is_empty(struct inode *inode)
+{
+	int nbuckets = (inode->i_size - OMFS_DIR_START) / 8;
+	struct buffer_head *bh;
+	u64 *ptr;
+	int i;
+
+	bh = sb_bread(inode->i_sb, clus_to_blk(OMFS_SB(inode->i_sb),
+			inode->i_ino));
+
+	if (!bh)
+		return 0;
+
+	ptr = (u64 *) &bh->b_data[OMFS_DIR_START];
+
+	for (i = 0; i < nbuckets; i++, ptr++)
+		if (*ptr != ~0)
+			break;
+
+	brelse(bh);
+	return *ptr != ~0;
+}
+
+static int omfs_unlink(struct inode *dir, struct dentry *dentry)
+{
+	int ret;
+	struct inode *inode = dentry->d_inode;
+
+	ret = omfs_delete_entry(dentry);
+	if (ret)
+		goto end_unlink;
+
+	inode_dec_link_count(inode);
+	mark_inode_dirty(dir);
+
+end_unlink:
+	return ret;
+}
+
+static int omfs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+	int err = -ENOTEMPTY;
+	struct inode *inode = dentry->d_inode;
+
+	if (omfs_dir_is_empty(inode)) {
+		err = omfs_unlink(dir, dentry);
+		if (!err)
+			inode_dec_link_count(inode);
+	}
+	return err;
+}
+
+static int omfs_add_node(struct inode *dir, struct dentry *dentry, int mode)
+{
+	int err;
+	struct inode *inode = omfs_new_inode(dir, mode);
+
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
+
+	err = omfs_make_empty(inode, dir->i_sb);
+	if (err)
+		goto out_free_inode;
+
+	err = omfs_add_link(dentry, inode);
+	if (err)
+		goto out_free_inode;
+
+	d_instantiate(dentry, inode);
+	return 0;
+
+out_free_inode:
+	iput(inode);
+	return err;
+}
+
+static int omfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+	return omfs_add_node(dir, dentry, mode | S_IFDIR);
+}
+
+static int omfs_create(struct inode *dir, struct dentry *dentry, int mode,
+		struct nameidata *nd)
+{
+	return omfs_add_node(dir, dentry, mode | S_IFREG);
+}
+
+static struct dentry *omfs_lookup(struct inode *dir, struct dentry *dentry,
+				  struct nameidata *nd)
+{
+	struct buffer_head *bh;
+	struct inode *inode = NULL;
+
+	if (dentry->d_name.len > OMFS_NAMELEN)
+		return ERR_PTR(-ENAMETOOLONG);
+
+	bh = omfs_find_entry(dir, dentry->d_name.name, dentry->d_name.len);
+	if (!IS_ERR(bh)) {
+		struct omfs_inode *oi = (struct omfs_inode *)bh->b_data;
+		ino_t ino = be64_to_cpu(oi->i_head.h_self);
+		brelse(bh);
+		inode = omfs_iget(dir->i_sb, ino);
+		if (IS_ERR(inode))
+			return ERR_CAST(inode);
+	}
+	d_add(dentry, inode);
+	return NULL;
+}
+
+/* sanity check block's self pointer */
+int omfs_is_bad(struct omfs_sb_info *sbi, struct omfs_header *header,
+	u64 fsblock)
+{
+	int is_bad;
+	u64 ino = be64_to_cpu(header->h_self);
+	is_bad = ((ino != fsblock) || (ino < sbi->s_root_ino) ||
+		(ino > sbi->s_num_blocks));
+
+	if (is_bad)
+		printk(KERN_WARNING "omfs: bad hash chain detected\n");
+
+	return is_bad;
+}
+
+static int omfs_fill_chain(struct file *filp, void *dirent, filldir_t filldir,
+		u64 fsblock, int hindex)
+{
+	struct inode *dir = filp->f_dentry->d_inode;
+	struct buffer_head *bh;
+	struct omfs_inode *oi;
+	u64 self;
+	int res = 0;
+	unsigned char d_type;
+
+	/* follow chain in this bucket */
+	while (fsblock != ~0) {
+		bh = sb_bread(dir->i_sb, clus_to_blk(OMFS_SB(dir->i_sb),
+				fsblock));
+		if (!bh)
+			goto out;
+
+		oi = (struct omfs_inode *) bh->b_data;
+		if (omfs_is_bad(OMFS_SB(dir->i_sb), &oi->i_head, fsblock)) {
+			brelse(bh);
+			goto out;
+		}
+
+		self = fsblock;
+		fsblock = be64_to_cpu(oi->i_sibling);
+
+		/* skip visited nodes */
+		if (hindex) {
+			hindex--;
+			brelse(bh);
+			continue;
+		}
+
+		d_type = (oi->i_type == OMFS_DIR) ? DT_DIR : DT_REG;
+
+		res = filldir(dirent, oi->i_name, strnlen(oi->i_name,
+			OMFS_NAMELEN), filp->f_pos, self, d_type);
+		if (res == 0)
+			filp->f_pos++;
+		brelse(bh);
+	}
+out:
+	return res;
+}
+
+static int omfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+		struct inode *new_dir, struct dentry *new_dentry)
+{
+	struct inode *new_inode = new_dentry->d_inode;
+	struct inode *old_inode = old_dentry->d_inode;
+	struct buffer_head *bh;
+	int is_dir;
+	int err;
+
+	is_dir = S_ISDIR(old_inode->i_mode);
+
+	if (new_inode) {
+		/* overwriting existing file/dir */
+		err = -ENOTEMPTY;
+		if (is_dir && !omfs_dir_is_empty(new_inode))
+			goto out;
+
+		err = -ENOENT;
+		bh = omfs_find_entry(new_dir, new_dentry->d_name.name,
+			new_dentry->d_name.len);
+		if (IS_ERR(bh))
+			goto out;
+		brelse(bh);
+
+		err = omfs_unlink(new_dir, new_dentry);
+		if (err)
+			goto out;
+	}
+
+	/* since omfs locates files by name, we need to unlink _before_
+	 * adding the new link or we won't find the old one */
+	inode_inc_link_count(old_inode);
+	err = omfs_unlink(old_dir, old_dentry);
+	if (err) {
+		inode_dec_link_count(old_inode);
+		goto out;
+	}
+
+	err = omfs_add_link(new_dentry, old_inode);
+	if (err)
+		goto out;
+
+	old_inode->i_ctime = CURRENT_TIME_SEC;
+out:
+	return err;
+}
+
+static int omfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+	struct inode *dir = filp->f_dentry->d_inode;
+	struct buffer_head *bh;
+	loff_t offset, res;
+	unsigned int hchain, hindex;
+	int nbuckets;
+	u64 fsblock;
+	int ret = -EINVAL;
+
+	if (filp->f_pos >> 32)
+		goto success;
+
+	switch ((unsigned long) filp->f_pos) {
+	case 0:
+		if (filldir(dirent, ".", 1, 0, dir->i_ino, DT_DIR) < 0)
+			goto success;
+		filp->f_pos++;
+		/* fall through */
+	case 1:
+		if (filldir(dirent, "..", 2, 1,
+		    parent_ino(filp->f_dentry), DT_DIR) < 0)
+			goto success;
+		filp->f_pos = 1 << 20;
+		/* fall through */
+	}
+
+	nbuckets = (dir->i_size - OMFS_DIR_START) / 8;
+
+	/* high 12 bits store bucket + 1 and low 20 bits store hash index */
+	hchain = (filp->f_pos >> 20) - 1;
+	hindex = filp->f_pos & 0xfffff;
+
+	bh = sb_bread(dir->i_sb, clus_to_blk(OMFS_SB(dir->i_sb), dir->i_ino));
+	if (!bh)
+		goto out;
+
+	offset = OMFS_DIR_START + hchain * 8;
+
+	for (; hchain < nbuckets; hchain++, offset += 8) {
+		fsblock = be64_to_cpu(*((__be64 *) &bh->b_data[offset]));
+
+		res = omfs_fill_chain(filp, dirent, filldir, fsblock, hindex);
+		hindex = 0;
+		if (res < 0)
+			break;
+
+		filp->f_pos = (hchain+2) << 20;
+	}
+	brelse(bh);
+success:
+	ret = 0;
+out:
+	return ret;
+}
+
+struct inode_operations omfs_dir_inops = {
+	.lookup = omfs_lookup,
+	.mkdir = omfs_mkdir,
+	.rename = omfs_rename,
+	.create = omfs_create,
+	.unlink = omfs_unlink,
+	.rmdir = omfs_rmdir,
+};
+
+struct file_operations omfs_dir_operations = {
+	.read = generic_read_dir,
+	.readdir = omfs_readdir,
+};
diff --git a/fs/omfs/file.c b/fs/omfs/file.c
new file mode 100644
index 000000000000..66e01fae4384
--- /dev/null
+++ b/fs/omfs/file.c
@@ -0,0 +1,346 @@
+/*
+ * OMFS (as used by RIO Karma) file operations.
+ * Copyright (C) 2005 Bob Copeland <me@bobcopeland.com>
+ * Released under GPL v2.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/mpage.h>
+#include "omfs.h"
+
+static int omfs_sync_file(struct file *file, struct dentry *dentry,
+		int datasync)
+{
+	struct inode *inode = dentry->d_inode;
+	int err;
+
+	err = sync_mapping_buffers(inode->i_mapping);
+	if (!(inode->i_state & I_DIRTY))
+		return err;
+	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+		return err;
+	err |= omfs_sync_inode(inode);
+	return err ? -EIO : 0;
+}
+
+void omfs_make_empty_table(struct buffer_head *bh, int offset)
+{
+	struct omfs_extent *oe = (struct omfs_extent *) &bh->b_data[offset];
+
+	oe->e_next = ~0ULL;
+	oe->e_extent_count = cpu_to_be32(1),
+	oe->e_fill = cpu_to_be32(0x22),
+	oe->e_entry.e_cluster = ~0ULL;
+	oe->e_entry.e_blocks = ~0ULL;
+}
+
+int omfs_shrink_inode(struct inode *inode)
+{
+	struct omfs_sb_info *sbi = OMFS_SB(inode->i_sb);
+	struct omfs_extent *oe;
+	struct omfs_extent_entry *entry;
+	struct buffer_head *bh;
+	u64 next, last;
+	u32 extent_count;
+	int ret;
+
+	/* traverse extent table, freeing each entry that is greater
+	 * than inode->i_size;
+	 */
+	next = inode->i_ino;
+
+	/* only support truncate -> 0 for now */
+	ret = -EIO;
+	if (inode->i_size != 0)
+		goto out;
+
+	bh = sb_bread(inode->i_sb, clus_to_blk(sbi, next));
+	if (!bh)
+		goto out;
+
+	oe = (struct omfs_extent *)(&bh->b_data[OMFS_EXTENT_START]);
+
+	for (;;) {
+
+		if (omfs_is_bad(sbi, (struct omfs_header *) bh->b_data, next)) {
+			brelse(bh);
+			goto out;
+		}
+
+		extent_count = be32_to_cpu(oe->e_extent_count);
+		last = next;
+		next = be64_to_cpu(oe->e_next);
+		entry = &oe->e_entry;
+
+		/* ignore last entry as it is the terminator */
+		for (; extent_count > 1; extent_count--) {
+			u64 start, count;
+			start = be64_to_cpu(entry->e_cluster);
+			count = be64_to_cpu(entry->e_blocks);
+
+			omfs_clear_range(inode->i_sb, start, (int) count);
+			entry++;
+		}
+		omfs_make_empty_table(bh, (char *) oe - bh->b_data);
+		mark_buffer_dirty(bh);
+		brelse(bh);
+
+		if (last != inode->i_ino)
+			omfs_clear_range(inode->i_sb, last, sbi->s_mirrors);
+
+		if (next == ~0)
+			break;
+
+		bh = sb_bread(inode->i_sb, clus_to_blk(sbi, next));
+		if (!bh)
+			goto out;
+		oe = (struct omfs_extent *) (&bh->b_data[OMFS_EXTENT_CONT]);
+	}
+	ret = 0;
+out:
+	return ret;
+}
+
+static void omfs_truncate(struct inode *inode)
+{
+	omfs_shrink_inode(inode);
+	mark_inode_dirty(inode);
+}
+
+/*
+ * Add new blocks to the current extent, or create new entries/continuations
+ * as necessary.
+ */
+static int omfs_grow_extent(struct inode *inode, struct omfs_extent *oe,
+			u64 *ret_block)
+{
+	struct omfs_extent_entry *terminator;
+	struct omfs_extent_entry *entry = &oe->e_entry;
+	struct omfs_sb_info *sbi = OMFS_SB(inode->i_sb);
+	u32 extent_count = be32_to_cpu(oe->e_extent_count);
+	u64 new_block = 0;
+	u32 max_count;
+	int new_count;
+	int ret = 0;
+
+	/* reached the end of the extent table with no blocks mapped.
+	 * there are three possibilities for adding: grow last extent,
+	 * add a new extent to the current extent table, and add a
+	 * continuation inode.  in last two cases need an allocator for
+	 * sbi->s_cluster_size
+	 */
+
+	/* TODO: handle holes */
+
+	/* should always have a terminator */
+	if (extent_count < 1)
+		return -EIO;
+
+	/* trivially grow current extent, if next block is not taken */
+	terminator = entry + extent_count - 1;
+	if (extent_count > 1) {
+		entry = terminator-1;
+		new_block = be64_to_cpu(entry->e_cluster) +
+			be64_to_cpu(entry->e_blocks);
+
+		if (omfs_allocate_block(inode->i_sb, new_block)) {
+			entry->e_blocks =
+				cpu_to_be64(be64_to_cpu(entry->e_blocks) + 1);
+			terminator->e_blocks = ~(cpu_to_be64(
+				be64_to_cpu(~terminator->e_blocks) + 1));
+			goto out;
+		}
+	}
+	max_count = (sbi->s_sys_blocksize - OMFS_EXTENT_START -
+		sizeof(struct omfs_extent)) /
+		sizeof(struct omfs_extent_entry) + 1;
+
+	/* TODO: add a continuation block here */
+	if (be32_to_cpu(oe->e_extent_count) > max_count-1)
+		return -EIO;
+
+	/* try to allocate a new cluster */
+	ret = omfs_allocate_range(inode->i_sb, 1, sbi->s_clustersize,
+		&new_block, &new_count);
+	if (ret)
+		goto out_fail;
+
+	/* copy terminator down an entry */
+	entry = terminator;
+	terminator++;
+	memcpy(terminator, entry, sizeof(struct omfs_extent_entry));
+
+	entry->e_cluster = cpu_to_be64(new_block);
+	entry->e_blocks = cpu_to_be64((u64) new_count);
+
+	terminator->e_blocks = ~(cpu_to_be64(
+		be64_to_cpu(~terminator->e_blocks) + (u64) new_count));
+
+	/* write in new entry */
+	oe->e_extent_count = cpu_to_be32(1 + be32_to_cpu(oe->e_extent_count));
+
+out:
+	*ret_block = new_block;
+out_fail:
+	return ret;
+}
+
+/*
+ * Scans across the directory table for a given file block number.
+ * If block not found, return 0.
+ */
+static sector_t find_block(struct inode *inode, struct omfs_extent_entry *ent,
+			sector_t block, int count, int *left)
+{
+	/* count > 1 because of terminator */
+	sector_t searched = 0;
+	for (; count > 1; count--) {
+		int numblocks = clus_to_blk(OMFS_SB(inode->i_sb),
+			be64_to_cpu(ent->e_blocks));
+
+		if (block >= searched  &&
+		    block < searched + numblocks) {
+			/*
+			 * found it at cluster + (block - searched)
+			 * numblocks - (block - searched) is remainder
+			 */
+			*left = numblocks - (block - searched);
+			return clus_to_blk(OMFS_SB(inode->i_sb),
+				be64_to_cpu(ent->e_cluster)) +
+				block - searched;
+		}
+		searched += numblocks;
+		ent++;
+	}
+	return 0;
+}
+
+static int omfs_get_block(struct inode *inode, sector_t block,
+			  struct buffer_head *bh_result, int create)
+{
+	struct buffer_head *bh;
+	sector_t next, offset;
+	int ret;
+	u64 new_block;
+	int extent_count;
+	struct omfs_extent *oe;
+	struct omfs_extent_entry *entry;
+	struct omfs_sb_info *sbi = OMFS_SB(inode->i_sb);
+	int max_blocks = bh_result->b_size >> inode->i_blkbits;
+	int remain;
+
+	ret = -EIO;
+	bh = sb_bread(inode->i_sb, clus_to_blk(sbi, inode->i_ino));
+	if (!bh)
+		goto out;
+
+	oe = (struct omfs_extent *)(&bh->b_data[OMFS_EXTENT_START]);
+	next = inode->i_ino;
+
+	for (;;) {
+
+		if (omfs_is_bad(sbi, (struct omfs_header *) bh->b_data, next))
+			goto out_brelse;
+
+		extent_count = be32_to_cpu(oe->e_extent_count);
+		next = be64_to_cpu(oe->e_next);
+		entry = &oe->e_entry;
+
+		offset = find_block(inode, entry, block, extent_count, &remain);
+		if (offset > 0) {
+			ret = 0;
+			map_bh(bh_result, inode->i_sb, offset);
+			if (remain > max_blocks)
+				remain = max_blocks;
+			bh_result->b_size = (remain << inode->i_blkbits);
+			goto out_brelse;
+		}
+		if (next == ~0)
+			break;
+
+		brelse(bh);
+		bh = sb_bread(inode->i_sb, clus_to_blk(sbi, next));
+		if (!bh)
+			goto out;
+		oe = (struct omfs_extent *) (&bh->b_data[OMFS_EXTENT_CONT]);
+	}
+	if (create) {
+		ret = omfs_grow_extent(inode, oe, &new_block);
+		if (ret == 0) {
+			mark_buffer_dirty(bh);
+			mark_inode_dirty(inode);
+			map_bh(bh_result, inode->i_sb,
+					clus_to_blk(sbi, new_block));
+		}
+	}
+out_brelse:
+	brelse(bh);
+out:
+	return ret;
+}
+
+static int omfs_readpage(struct file *file, struct page *page)
+{
+	return block_read_full_page(page, omfs_get_block);
+}
+
+static int omfs_readpages(struct file *file, struct address_space *mapping,
+		struct list_head *pages, unsigned nr_pages)
+{
+	return mpage_readpages(mapping, pages, nr_pages, omfs_get_block);
+}
+
+static int omfs_writepage(struct page *page, struct writeback_control *wbc)
+{
+	return block_write_full_page(page, omfs_get_block, wbc);
+}
+
+static int
+omfs_writepages(struct address_space *mapping, struct writeback_control *wbc)
+{
+	return mpage_writepages(mapping, wbc, omfs_get_block);
+}
+
+static int omfs_write_begin(struct file *file, struct address_space *mapping,
+			loff_t pos, unsigned len, unsigned flags,
+			struct page **pagep, void **fsdata)
+{
+	*pagep = NULL;
+	return block_write_begin(file, mapping, pos, len, flags,
+				pagep, fsdata, omfs_get_block);
+}
+
+static sector_t omfs_bmap(struct address_space *mapping, sector_t block)
+{
+	return generic_block_bmap(mapping, block, omfs_get_block);
+}
+
+struct file_operations omfs_file_operations = {
+	.llseek = generic_file_llseek,
+	.read = do_sync_read,
+	.write = do_sync_write,
+	.aio_read = generic_file_aio_read,
+	.aio_write = generic_file_aio_write,
+	.mmap = generic_file_mmap,
+	.fsync = omfs_sync_file,
+	.splice_read = generic_file_splice_read,
+};
+
+struct inode_operations omfs_file_inops = {
+	.truncate = omfs_truncate
+};
+
+struct address_space_operations omfs_aops = {
+	.readpage = omfs_readpage,
+	.readpages = omfs_readpages,
+	.writepage = omfs_writepage,
+	.writepages = omfs_writepages,
+	.sync_page = block_sync_page,
+	.write_begin = omfs_write_begin,
+	.write_end = generic_write_end,
+	.bmap = omfs_bmap,
+};
+
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
new file mode 100644
index 000000000000..d865f5535436
--- /dev/null
+++ b/fs/omfs/inode.c
@@ -0,0 +1,553 @@
+/*
+ * Optimized MPEG FS - inode and super operations.
+ * Copyright (C) 2006 Bob Copeland <me@bobcopeland.com>
+ * Released under GPL v2.
+ */
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/vfs.h>
+#include <linux/parser.h>
+#include <linux/buffer_head.h>
+#include <linux/vmalloc.h>
+#include <linux/crc-itu-t.h>
+#include "omfs.h"
+
+MODULE_AUTHOR("Bob Copeland <me@bobcopeland.com>");
+MODULE_DESCRIPTION("OMFS (ReplayTV/Karma) Filesystem for Linux");
+MODULE_LICENSE("GPL");
+
+struct inode *omfs_new_inode(struct inode *dir, int mode)
+{
+	struct inode *inode;
+	u64 new_block;
+	int err;
+	int len;
+	struct omfs_sb_info *sbi = OMFS_SB(dir->i_sb);
+
+	inode = new_inode(dir->i_sb);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+
+	err = omfs_allocate_range(dir->i_sb, sbi->s_mirrors, sbi->s_mirrors,
+			&new_block, &len);
+	if (err)
+		goto fail;
+
+	inode->i_ino = new_block;
+	inode->i_mode = mode;
+	inode->i_uid = current->fsuid;
+	inode->i_gid = current->fsgid;
+	inode->i_blocks = 0;
+	inode->i_mapping->a_ops = &omfs_aops;
+
+	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	switch (mode & S_IFMT) {
+	case S_IFDIR:
+		inode->i_op = &omfs_dir_inops;
+		inode->i_fop = &omfs_dir_operations;
+		inode->i_size = sbi->s_sys_blocksize;
+		inc_nlink(inode);
+		break;
+	case S_IFREG:
+		inode->i_op = &omfs_file_inops;
+		inode->i_fop = &omfs_file_operations;
+		inode->i_size = 0;
+		break;
+	}
+
+	insert_inode_hash(inode);
+	mark_inode_dirty(inode);
+	return inode;
+fail:
+	make_bad_inode(inode);
+	iput(inode);
+	return ERR_PTR(err);
+}
+
+/*
+ * Update the header checksums for a dirty inode based on its contents.
+ * Caller is expected to hold the buffer head underlying oi and mark it
+ * dirty.
+ */
+static void omfs_update_checksums(struct omfs_inode *oi)
+{
+	int xor, i, ofs = 0, count;
+	u16 crc = 0;
+	unsigned char *ptr = (unsigned char *) oi;
+
+	count = be32_to_cpu(oi->i_head.h_body_size);
+	ofs = sizeof(struct omfs_header);
+
+	crc = crc_itu_t(crc, ptr + ofs, count);
+	oi->i_head.h_crc = cpu_to_be16(crc);
+
+	xor = ptr[0];
+	for (i = 1; i < OMFS_XOR_COUNT; i++)
+		xor ^= ptr[i];
+
+	oi->i_head.h_check_xor = xor;
+}
+
+static int omfs_write_inode(struct inode *inode, int wait)
+{
+	struct omfs_inode *oi;
+	struct omfs_sb_info *sbi = OMFS_SB(inode->i_sb);
+	struct buffer_head *bh, *bh2;
+	unsigned int block;
+	u64 ctime;
+	int i;
+	int ret = -EIO;
+	int sync_failed = 0;
+
+	/* get current inode since we may have written sibling ptrs etc. */
+	block = clus_to_blk(sbi, inode->i_ino);
+	bh = sb_bread(inode->i_sb, block);
+	if (!bh)
+		goto out;
+
+	oi = (struct omfs_inode *) bh->b_data;
+
+	oi->i_head.h_self = cpu_to_be64(inode->i_ino);
+	if (S_ISDIR(inode->i_mode))
+		oi->i_type = OMFS_DIR;
+	else if (S_ISREG(inode->i_mode))
+		oi->i_type = OMFS_FILE;
+	else {
+		printk(KERN_WARNING "omfs: unknown file type: %d\n",
+			inode->i_mode);
+		goto out_brelse;
+	}
+
+	oi->i_head.h_body_size = cpu_to_be32(sbi->s_sys_blocksize -
+		sizeof(struct omfs_header));
+	oi->i_head.h_version = 1;
+	oi->i_head.h_type = OMFS_INODE_NORMAL;
+	oi->i_head.h_magic = OMFS_IMAGIC;
+	oi->i_size = cpu_to_be64(inode->i_size);
+
+	ctime = inode->i_ctime.tv_sec * 1000LL +
+		((inode->i_ctime.tv_nsec + 999)/1000);
+	oi->i_ctime = cpu_to_be64(ctime);
+
+	omfs_update_checksums(oi);
+
+	mark_buffer_dirty(bh);
+	if (wait) {
+		sync_dirty_buffer(bh);
+		if (buffer_req(bh) && !buffer_uptodate(bh))
+			sync_failed = 1;
+	}
+
+	/* if mirroring writes, copy to next fsblock */
+	for (i = 1; i < sbi->s_mirrors; i++) {
+		bh2 = sb_bread(inode->i_sb, block + i *
+			(sbi->s_blocksize / sbi->s_sys_blocksize));
+		if (!bh2)
+			goto out_brelse;
+
+		memcpy(bh2->b_data, bh->b_data, bh->b_size);
+		mark_buffer_dirty(bh2);
+		if (wait) {
+			sync_dirty_buffer(bh2);
+			if (buffer_req(bh2) && !buffer_uptodate(bh2))
+				sync_failed = 1;
+		}
+		brelse(bh2);
+	}
+	ret = (sync_failed) ? -EIO : 0;
+out_brelse:
+	brelse(bh);
+out:
+	return ret;
+}
+
+int omfs_sync_inode(struct inode *inode)
+{
+	return omfs_write_inode(inode, 1);
+}
+
+/*
+ * called when an entry is deleted, need to clear the bits in the
+ * bitmaps.
+ */
+static void omfs_delete_inode(struct inode *inode)
+{
+	truncate_inode_pages(&inode->i_data, 0);
+
+	if (S_ISREG(inode->i_mode)) {
+		inode->i_size = 0;
+		omfs_shrink_inode(inode);
+	}
+
+	omfs_clear_range(inode->i_sb, inode->i_ino, 2);
+	clear_inode(inode);
+}
+
+struct inode *omfs_iget(struct super_block *sb, ino_t ino)
+{
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+	struct omfs_inode *oi;
+	struct buffer_head *bh;
+	unsigned int block;
+	u64 ctime;
+	unsigned long nsecs;
+	struct inode *inode;
+
+	inode = iget_locked(sb, ino);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+	if (!(inode->i_state & I_NEW))
+		return inode;
+
+	block = clus_to_blk(sbi, ino);
+	bh = sb_bread(inode->i_sb, block);
+	if (!bh)
+		goto iget_failed;
+
+	oi = (struct omfs_inode *)bh->b_data;
+
+	/* check self */
+	if (ino != be64_to_cpu(oi->i_head.h_self))
+		goto fail_bh;
+
+	inode->i_uid = sbi->s_uid;
+	inode->i_gid = sbi->s_gid;
+
+	ctime = be64_to_cpu(oi->i_ctime);
+	nsecs = do_div(ctime, 1000) * 1000L;
+
+	inode->i_atime.tv_sec = ctime;
+	inode->i_mtime.tv_sec = ctime;
+	inode->i_ctime.tv_sec = ctime;
+	inode->i_atime.tv_nsec = nsecs;
+	inode->i_mtime.tv_nsec = nsecs;
+	inode->i_ctime.tv_nsec = nsecs;
+
+	inode->i_mapping->a_ops = &omfs_aops;
+
+	switch (oi->i_type) {
+	case OMFS_DIR:
+		inode->i_mode = S_IFDIR | (S_IRWXUGO & ~sbi->s_dmask);
+		inode->i_op = &omfs_dir_inops;
+		inode->i_fop = &omfs_dir_operations;
+		inode->i_size = be32_to_cpu(oi->i_head.h_body_size) +
+			sizeof(struct omfs_header);
+		inc_nlink(inode);
+		break;
+	case OMFS_FILE:
+		inode->i_mode = S_IFREG | (S_IRWXUGO & ~sbi->s_fmask);
+		inode->i_fop = &omfs_file_operations;
+		inode->i_size = be64_to_cpu(oi->i_size);
+		break;
+	}
+	brelse(bh);
+	unlock_new_inode(inode);
+	return inode;
+fail_bh:
+	brelse(bh);
+iget_failed:
+	iget_failed(inode);
+	return ERR_PTR(-EIO);
+}
+
+static void omfs_put_super(struct super_block *sb)
+{
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+	kfree(sbi->s_imap);
+	kfree(sbi);
+	sb->s_fs_info = NULL;
+}
+
+static int omfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	struct super_block *s = dentry->d_sb;
+	struct omfs_sb_info *sbi = OMFS_SB(s);
+	buf->f_type = OMFS_MAGIC;
+	buf->f_bsize = sbi->s_blocksize;
+	buf->f_blocks = sbi->s_num_blocks;
+	buf->f_files = sbi->s_num_blocks;
+	buf->f_namelen = OMFS_NAMELEN;
+
+	buf->f_bfree = buf->f_bavail = buf->f_ffree =
+		omfs_count_free(s);
+	return 0;
+}
+
+static struct super_operations omfs_sops = {
+	.write_inode	= omfs_write_inode,
+	.delete_inode	= omfs_delete_inode,
+	.put_super	= omfs_put_super,
+	.statfs		= omfs_statfs,
+	.show_options	= generic_show_options,
+};
+
+/*
+ * For Rio Karma, there is an on-disk free bitmap whose location is
+ * stored in the root block.  For ReplayTV, there is no such free bitmap
+ * so we have to walk the tree.  Both inodes and file data are allocated
+ * from the same map.  This array can be big (300k) so we allocate
+ * in units of the blocksize.
+ */
+static int omfs_get_imap(struct super_block *sb)
+{
+	int bitmap_size;
+	int array_size;
+	int count;
+	struct omfs_sb_info *sbi = OMFS_SB(sb);
+	struct buffer_head *bh;
+	unsigned long **ptr;
+	sector_t block;
+
+	bitmap_size = DIV_ROUND_UP(sbi->s_num_blocks, 8);
+	array_size = DIV_ROUND_UP(bitmap_size, sb->s_blocksize);
+
+	if (sbi->s_bitmap_ino == ~0ULL)
+		goto out;
+
+	sbi->s_imap_size = array_size;
+	sbi->s_imap = kzalloc(array_size * sizeof(unsigned long *), GFP_KERNEL);
+	if (!sbi->s_imap)
+		goto nomem;
+
+	block = clus_to_blk(sbi, sbi->s_bitmap_ino);
+	ptr = sbi->s_imap;
+	for (count = bitmap_size; count > 0; count -= sb->s_blocksize) {
+		bh = sb_bread(sb, block++);
+		if (!bh)
+			goto nomem_free;
+		*ptr = kmalloc(sb->s_blocksize, GFP_KERNEL);
+		if (!*ptr) {
+			brelse(bh);
+			goto nomem_free;
+		}
+		memcpy(*ptr, bh->b_data, sb->s_blocksize);
+		if (count < sb->s_blocksize)
+			memset((void *)*ptr + count, 0xff,
+				sb->s_blocksize - count);
+		brelse(bh);
+		ptr++;
+	}
+out:
+	return 0;
+
+nomem_free:
+	for (count = 0; count < array_size; count++)
+		kfree(sbi->s_imap[count]);
+
+	kfree(sbi->s_imap);
+nomem:
+	sbi->s_imap = NULL;
+	sbi->s_imap_size = 0;
+	return -ENOMEM;
+}
+
+enum {
+	Opt_uid, Opt_gid, Opt_umask, Opt_dmask, Opt_fmask
+};
+
+static match_table_t tokens = {
+	{Opt_uid, "uid=%u"},
+	{Opt_gid, "gid=%u"},
+	{Opt_umask, "umask=%o"},
+	{Opt_dmask, "dmask=%o"},
+	{Opt_fmask, "fmask=%o"},
+};
+
+static int parse_options(char *options, struct omfs_sb_info *sbi)
+{
+	char *p;
+	substring_t args[MAX_OPT_ARGS];
+	int option;
+
+	if (!options)
+		return 1;
+
+	while ((p = strsep(&options, ",")) != NULL) {
+		int token;
+		if (!*p)
+			continue;
+
+		token = match_token(p, tokens, args);
+		switch (token) {
+		case Opt_uid:
+			if (match_int(&args[0], &option))
+				return 0;
+			sbi->s_uid = option;
+			break;
+		case Opt_gid:
+			if (match_int(&args[0], &option))
+				return 0;
+			sbi->s_gid = option;
+			break;
+		case Opt_umask:
+			if (match_octal(&args[0], &option))
+				return 0;
+			sbi->s_fmask = sbi->s_dmask = option;
+			break;
+		case Opt_dmask:
+			if (match_octal(&args[0], &option))
+				return 0;
+			sbi->s_dmask = option;
+			break;
+		case Opt_fmask:
+			if (match_octal(&args[0], &option))
+				return 0;
+			sbi->s_fmask = option;
+			break;
+		default:
+			return 0;
+		}
+	}
+	return 1;
+}
+
+static int omfs_fill_super(struct super_block *sb, void *data, int silent)
+{
+	struct buffer_head *bh, *bh2;
+	struct omfs_super_block *omfs_sb;
+	struct omfs_root_block *omfs_rb;
+	struct omfs_sb_info *sbi;
+	struct inode *root;
+	sector_t start;
+	int ret = -EINVAL;
+
+	save_mount_options(sb, (char *) data);
+
+	sbi = kzalloc(sizeof(struct omfs_sb_info), GFP_KERNEL);
+	if (!sbi)
+		return -ENOMEM;
+
+	sb->s_fs_info = sbi;
+
+	sbi->s_uid = current->uid;
+	sbi->s_gid = current->gid;
+	sbi->s_dmask = sbi->s_fmask = current->fs->umask;
+
+	if (!parse_options((char *) data, sbi))
+		goto end;
+
+	sb->s_maxbytes = 0xffffffff;
+
+	sb_set_blocksize(sb, 0x200);
+
+	bh = sb_bread(sb, 0);
+	if (!bh)
+		goto end;
+
+	omfs_sb = (struct omfs_super_block *)bh->b_data;
+
+	if (omfs_sb->s_magic != cpu_to_be32(OMFS_MAGIC)) {
+		if (!silent)
+			printk(KERN_ERR "omfs: Invalid superblock (%x)\n",
+				   omfs_sb->s_magic);
+		goto out_brelse_bh;
+	}
+	sb->s_magic = OMFS_MAGIC;
+
+	sbi->s_num_blocks = be64_to_cpu(omfs_sb->s_num_blocks);
+	sbi->s_blocksize = be32_to_cpu(omfs_sb->s_blocksize);
+	sbi->s_mirrors = be32_to_cpu(omfs_sb->s_mirrors);
+	sbi->s_root_ino = be64_to_cpu(omfs_sb->s_root_block);
+	sbi->s_sys_blocksize = be32_to_cpu(omfs_sb->s_sys_blocksize);
+	mutex_init(&sbi->s_bitmap_lock);
+
+	if (sbi->s_sys_blocksize > PAGE_SIZE) {
+		printk(KERN_ERR "omfs: sysblock size (%d) is out of range\n",
+			sbi->s_sys_blocksize);
+		goto out_brelse_bh;
+	}
+
+	if (sbi->s_blocksize < sbi->s_sys_blocksize ||
+	    sbi->s_blocksize > OMFS_MAX_BLOCK_SIZE) {
+		printk(KERN_ERR "omfs: block size (%d) is out of range\n",
+			sbi->s_blocksize);
+		goto out_brelse_bh;
+	}
+
+	/*
+	 * Use sys_blocksize as the fs block since it is smaller than a
+	 * page while the fs blocksize can be larger.
+	 */
+	sb_set_blocksize(sb, sbi->s_sys_blocksize);
+
+	/*
+	 * ...and the difference goes into a shift.  sys_blocksize is always
+	 * a power of two factor of blocksize.
+	 */
+	sbi->s_block_shift = get_bitmask_order(sbi->s_blocksize) -
+		get_bitmask_order(sbi->s_sys_blocksize);
+
+	start = clus_to_blk(sbi, be64_to_cpu(omfs_sb->s_root_block));
+	bh2 = sb_bread(sb, start);
+	if (!bh2)
+		goto out_brelse_bh;
+
+	omfs_rb = (struct omfs_root_block *)bh2->b_data;
+
+	sbi->s_bitmap_ino = be64_to_cpu(omfs_rb->r_bitmap);
+	sbi->s_clustersize = be32_to_cpu(omfs_rb->r_clustersize);
+
+	if (sbi->s_num_blocks != be64_to_cpu(omfs_rb->r_num_blocks)) {
+		printk(KERN_ERR "omfs: block count discrepancy between "
+			"super and root blocks (%llx, %llx)\n",
+			sbi->s_num_blocks, be64_to_cpu(omfs_rb->r_num_blocks));
+		goto out_brelse_bh2;
+	}
+
+	ret = omfs_get_imap(sb);
+	if (ret)
+		goto out_brelse_bh2;
+
+	sb->s_op = &omfs_sops;
+
+	root = omfs_iget(sb, be64_to_cpu(omfs_rb->r_root_dir));
+	if (IS_ERR(root)) {
+		ret = PTR_ERR(root);
+		goto out_brelse_bh2;
+	}
+
+	sb->s_root = d_alloc_root(root);
+	if (!sb->s_root) {
+		iput(root);
+		goto out_brelse_bh2;
+	}
+	printk(KERN_DEBUG "omfs: Mounted volume %s\n", omfs_rb->r_name);
+
+	ret = 0;
+out_brelse_bh2:
+	brelse(bh2);
+out_brelse_bh:
+	brelse(bh);
+end:
+	return ret;
+}
+
+static int omfs_get_sb(struct file_system_type *fs_type,
+			int flags, const char *dev_name,
+			void *data, struct vfsmount *m)
+{
+	return get_sb_bdev(fs_type, flags, dev_name, data, omfs_fill_super, m);
+}
+
+static struct file_system_type omfs_fs_type = {
+	.owner = THIS_MODULE,
+	.name = "omfs",
+	.get_sb = omfs_get_sb,
+	.kill_sb = kill_block_super,
+	.fs_flags = FS_REQUIRES_DEV,
+};
+
+static int __init init_omfs_fs(void)
+{
+	return register_filesystem(&omfs_fs_type);
+}
+
+static void __exit exit_omfs_fs(void)
+{
+	unregister_filesystem(&omfs_fs_type);
+}
+
+module_init(init_omfs_fs);
+module_exit(exit_omfs_fs);
diff --git a/fs/omfs/omfs.h b/fs/omfs/omfs.h
new file mode 100644
index 000000000000..2bc0f0670406
--- /dev/null
+++ b/fs/omfs/omfs.h
@@ -0,0 +1,67 @@
+#ifndef _OMFS_H
+#define _OMFS_H
+
+#include <linux/module.h>
+#include <linux/fs.h>
+
+#include "omfs_fs.h"
+
+/* In-memory structures */
+struct omfs_sb_info {
+	u64 s_num_blocks;
+	u64 s_bitmap_ino;
+	u64 s_root_ino;
+	u32 s_blocksize;
+	u32 s_mirrors;
+	u32 s_sys_blocksize;
+	u32 s_clustersize;
+	int s_block_shift;
+	unsigned long **s_imap;
+	int s_imap_size;
+	struct mutex s_bitmap_lock;
+	int s_uid;
+	int s_gid;
+	int s_dmask;
+	int s_fmask;
+};
+
+/* convert a cluster number to a scaled block number */
+static inline sector_t clus_to_blk(struct omfs_sb_info *sbi, sector_t block)
+{
+	return block << sbi->s_block_shift;
+}
+
+static inline struct omfs_sb_info *OMFS_SB(struct super_block *sb)
+{
+	return sb->s_fs_info;
+}
+
+/* bitmap.c */
+extern unsigned long omfs_count_free(struct super_block *sb);
+extern int omfs_allocate_block(struct super_block *sb, u64 block);
+extern int omfs_allocate_range(struct super_block *sb, int min_request,
+			int max_request, u64 *return_block, int *return_size);
+extern int omfs_clear_range(struct super_block *sb, u64 block, int count);
+
+/* dir.c */
+extern struct file_operations omfs_dir_operations;
+extern struct inode_operations omfs_dir_inops;
+extern int omfs_make_empty(struct inode *inode, struct super_block *sb);
+extern int omfs_is_bad(struct omfs_sb_info *sbi, struct omfs_header *header,
+			u64 fsblock);
+
+/* file.c */
+extern struct file_operations omfs_file_operations;
+extern struct inode_operations omfs_file_inops;
+extern struct address_space_operations omfs_aops;
+extern void omfs_make_empty_table(struct buffer_head *bh, int offset);
+extern int omfs_shrink_inode(struct inode *inode);
+
+/* inode.c */
+extern struct inode *omfs_iget(struct super_block *sb, ino_t inode);
+extern struct inode *omfs_new_inode(struct inode *dir, int mode);
+extern int omfs_reserve_block(struct super_block *sb, sector_t block);
+extern int omfs_find_empty_block(struct super_block *sb, int mode, ino_t *ino);
+extern int omfs_sync_inode(struct inode *inode);
+
+#endif
diff --git a/fs/omfs/omfs_fs.h b/fs/omfs/omfs_fs.h
new file mode 100644
index 000000000000..12cca245d6e8
--- /dev/null
+++ b/fs/omfs/omfs_fs.h
@@ -0,0 +1,80 @@
+#ifndef _OMFS_FS_H
+#define _OMFS_FS_H
+
+/* OMFS On-disk structures */
+
+#define OMFS_MAGIC 0xC2993D87
+#define OMFS_IMAGIC 0xD2
+
+#define OMFS_DIR 'D'
+#define OMFS_FILE 'F'
+#define OMFS_INODE_NORMAL 'e'
+#define OMFS_INODE_CONTINUATION 'c'
+#define OMFS_INODE_SYSTEM 's'
+#define OMFS_NAMELEN 256
+#define OMFS_DIR_START 0x1b8
+#define OMFS_EXTENT_START 0x1d0
+#define OMFS_EXTENT_CONT 0x40
+#define OMFS_XOR_COUNT 19
+#define OMFS_MAX_BLOCK_SIZE 8192
+
+struct omfs_super_block {
+	char s_fill1[256];
+	__be64 s_root_block;		/* block number of omfs_root_block */
+	__be64 s_num_blocks;		/* total number of FS blocks */
+	__be32 s_magic;			/* OMFS_MAGIC */
+	__be32 s_blocksize;		/* size of a block */
+	__be32 s_mirrors;		/* # of mirrors of system blocks */
+	__be32 s_sys_blocksize;		/* size of non-data blocks */
+};
+
+struct omfs_header {
+	__be64 h_self;			/* FS block where this is located */
+	__be32 h_body_size;		/* size of useful data after header */
+	__be16 h_crc;			/* crc-ccitt of body_size bytes */
+	char h_fill1[2];
+	u8 h_version;			/* version, always 1 */
+	char h_type;			/* OMFS_INODE_X */
+	u8 h_magic;			/* OMFS_IMAGIC */
+	u8 h_check_xor;			/* XOR of header bytes before this */
+	__be32 h_fill2;
+};
+
+struct omfs_root_block {
+	struct omfs_header r_head;	/* header */
+	__be64 r_fill1;
+	__be64 r_num_blocks;		/* total number of FS blocks */
+	__be64 r_root_dir;		/* block # of root directory */
+	__be64 r_bitmap;		/* block # of free space bitmap */
+	__be32 r_blocksize;		/* size of a block */
+	__be32 r_clustersize;		/* size allocated for data blocks */
+	__be64 r_mirrors;		/* # of mirrors of system blocks */
+	char r_name[OMFS_NAMELEN];	/* partition label */
+};
+
+struct omfs_inode {
+	struct omfs_header i_head;	/* header */
+	__be64 i_parent;		/* parent containing this inode */
+	__be64 i_sibling;		/* next inode in hash bucket */
+	__be64 i_ctime;			/* ctime, in milliseconds */
+	char i_fill1[35];
+	char i_type;			/* OMFS_[DIR,FILE] */
+	__be32 i_fill2;
+	char i_fill3[64];
+	char i_name[OMFS_NAMELEN];	/* filename */
+	__be64 i_size;			/* size of file, in bytes */
+};
+
+struct omfs_extent_entry {
+	__be64 e_cluster;		/* start location of a set of blocks */
+	__be64 e_blocks;		/* number of blocks after e_cluster */
+};
+
+struct omfs_extent {
+	__be64 e_next;			/* next extent table location */
+	__be32 e_extent_count;		/* total # extents in this table */
+	__be32 e_fill;
+	struct omfs_extent_entry e_entry;	/* start of extent entries */
+};
+
+#endif
diff --git a/fs/open.c b/fs/open.c
index a99ad09c3197..52647be277a2 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -64,7 +64,8 @@ static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
 		memcpy(buf, &st, sizeof(st));
 	else {
 		if (sizeof buf->f_blocks == 4) {
-			if ((st.f_blocks | st.f_bfree | st.f_bavail) &
+			if ((st.f_blocks | st.f_bfree | st.f_bavail |
+			     st.f_bsize | st.f_frsize) &
 			    0xffffffff00000000ULL)
 				return -EOVERFLOW;
 			/*
@@ -121,37 +122,37 @@ static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
 	return 0;
 }
 
-asmlinkage long sys_statfs(const char __user * path, struct statfs __user * buf)
+asmlinkage long sys_statfs(const char __user *pathname, struct statfs __user * buf)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (!error) {
 		struct statfs tmp;
-		error = vfs_statfs_native(nd.path.dentry, &tmp);
+		error = vfs_statfs_native(path.dentry, &tmp);
 		if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
 			error = -EFAULT;
-		path_put(&nd.path);
+		path_put(&path);
 	}
 	return error;
 }
 
 
-asmlinkage long sys_statfs64(const char __user *path, size_t sz, struct statfs64 __user *buf)
+asmlinkage long sys_statfs64(const char __user *pathname, size_t sz, struct statfs64 __user *buf)
 {
-	struct nameidata nd;
+	struct path path;
 	long error;
 
 	if (sz != sizeof(*buf))
 		return -EINVAL;
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (!error) {
 		struct statfs64 tmp;
-		error = vfs_statfs64(nd.path.dentry, &tmp);
+		error = vfs_statfs64(path.dentry, &tmp);
 		if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
 			error = -EFAULT;
-		path_put(&nd.path);
+		path_put(&path);
 	}
 	return error;
 }
@@ -222,20 +223,20 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
 	return err;
 }
 
-static long do_sys_truncate(const char __user * path, loff_t length)
+static long do_sys_truncate(const char __user *pathname, loff_t length)
 {
-	struct nameidata nd;
-	struct inode * inode;
+	struct path path;
+	struct inode *inode;
 	int error;
 
 	error = -EINVAL;
 	if (length < 0)	/* sorry, but loff_t says... */
 		goto out;
 
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (error)
 		goto out;
-	inode = nd.path.dentry->d_inode;
+	inode = path.dentry->d_inode;
 
 	/* For directories it's -EISDIR, for other non-regulars - -EINVAL */
 	error = -EISDIR;
@@ -246,16 +247,16 @@ static long do_sys_truncate(const char __user * path, loff_t length)
 	if (!S_ISREG(inode->i_mode))
 		goto dput_and_out;
 
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (error)
 		goto dput_and_out;
 
-	error = vfs_permission(&nd, MAY_WRITE);
+	error = inode_permission(inode, MAY_WRITE);
 	if (error)
 		goto mnt_drop_write_and_out;
 
 	error = -EPERM;
-	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+	if (IS_APPEND(inode))
 		goto mnt_drop_write_and_out;
 
 	error = get_write_access(inode);
@@ -273,15 +274,15 @@ static long do_sys_truncate(const char __user * path, loff_t length)
 	error = locks_verify_truncate(inode, NULL, length);
 	if (!error) {
 		DQUOT_INIT(inode);
-		error = do_truncate(nd.path.dentry, length, 0, NULL);
+		error = do_truncate(path.dentry, length, 0, NULL);
 	}
 
 put_write_and_out:
 	put_write_access(inode);
 mnt_drop_write_and_out:
-	mnt_drop_write(nd.path.mnt);
+	mnt_drop_write(path.mnt);
 dput_and_out:
-	path_put(&nd.path);
+	path_put(&path);
 out:
 	return error;
 }
@@ -424,7 +425,8 @@ out:
  */
 asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
 {
-	struct nameidata nd;
+	struct path path;
+	struct inode *inode;
 	int old_fsuid, old_fsgid;
 	kernel_cap_t uninitialized_var(old_cap);  /* !SECURE_NO_SETUID_FIXUP */
 	int res;
@@ -447,7 +449,7 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
 		 * FIXME: There is a race here against sys_capset.  The
 		 * capabilities can change yet we will restore the old
 		 * value below.  We should hold task_capabilities_lock,
-		 * but we cannot because user_path_walk can sleep.
+		 * but we cannot because user_path_at can sleep.
 		 */
 #endif /* ndef CONFIG_SECURITY_FILE_CAPABILITIES */
 		if (current->uid)
@@ -456,14 +458,25 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
 			old_cap = cap_set_effective(current->cap_permitted);
 	}
 
-	res = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW|LOOKUP_ACCESS, &nd);
+	res = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
 	if (res)
 		goto out;
 
-	res = vfs_permission(&nd, mode);
+	inode = path.dentry->d_inode;
+
+	if ((mode & MAY_EXEC) && S_ISREG(inode->i_mode)) {
+		/*
+		 * MAY_EXEC on regular files is denied if the fs is mounted
+		 * with the "noexec" flag.
+		 */
+		res = -EACCES;
+		if (path.mnt->mnt_flags & MNT_NOEXEC)
+			goto out_path_release;
+	}
+
+	res = inode_permission(inode, mode | MAY_ACCESS);
 	/* SuS v2 requires we report a read only fs too */
-	if(res || !(mode & S_IWOTH) ||
-	   special_file(nd.path.dentry->d_inode->i_mode))
+	if (res || !(mode & S_IWOTH) || special_file(inode->i_mode))
 		goto out_path_release;
 	/*
 	 * This is a rare case where using __mnt_is_readonly()
@@ -475,11 +488,11 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
 	 * inherently racy and know that the fs may change
 	 * state before we even see this result.
 	 */
-	if (__mnt_is_readonly(nd.path.mnt))
+	if (__mnt_is_readonly(path.mnt))
 		res = -EROFS;
 
 out_path_release:
-	path_put(&nd.path);
+	path_put(&path);
 out:
 	current->fsuid = old_fsuid;
 	current->fsgid = old_fsgid;
@@ -497,22 +510,21 @@ asmlinkage long sys_access(const char __user *filename, int mode)
 
 asmlinkage long sys_chdir(const char __user * filename)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = __user_walk(filename,
-			    LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_CHDIR, &nd);
+	error = user_path_dir(filename, &path);
 	if (error)
 		goto out;
 
-	error = vfs_permission(&nd, MAY_EXEC);
+	error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
 	if (error)
 		goto dput_and_out;
 
-	set_fs_pwd(current->fs, &nd.path);
+	set_fs_pwd(current->fs, &path);
 
 dput_and_out:
-	path_put(&nd.path);
+	path_put(&path);
 out:
 	return error;
 }
@@ -534,7 +546,7 @@ asmlinkage long sys_fchdir(unsigned int fd)
 	if (!S_ISDIR(inode->i_mode))
 		goto out_putf;
 
-	error = file_permission(file, MAY_EXEC);
+	error = inode_permission(inode, MAY_EXEC | MAY_ACCESS);
 	if (!error)
 		set_fs_pwd(current->fs, &file->f_path);
 out_putf:
@@ -545,14 +557,14 @@ out:
 
 asmlinkage long sys_chroot(const char __user * filename)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = __user_walk(filename, LOOKUP_FOLLOW | LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd);
+	error = user_path_dir(filename, &path);
 	if (error)
 		goto out;
 
-	error = vfs_permission(&nd, MAY_EXEC);
+	error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_ACCESS);
 	if (error)
 		goto dput_and_out;
 
@@ -560,11 +572,10 @@ asmlinkage long sys_chroot(const char __user * filename)
 	if (!capable(CAP_SYS_CHROOT))
 		goto dput_and_out;
 
-	set_fs_root(current->fs, &nd.path);
-	set_fs_altroot();
+	set_fs_root(current->fs, &path);
 	error = 0;
 dput_and_out:
-	path_put(&nd.path);
+	path_put(&path);
 out:
 	return error;
 }
@@ -589,9 +600,6 @@ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
 	err = mnt_want_write(file->f_path.mnt);
 	if (err)
 		goto out_putf;
-	err = -EPERM;
-	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-		goto out_drop_write;
 	mutex_lock(&inode->i_mutex);
 	if (mode == (mode_t) -1)
 		mode = inode->i_mode;
@@ -599,8 +607,6 @@ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
 	newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
 	err = notify_change(dentry, &newattrs);
 	mutex_unlock(&inode->i_mutex);
-
-out_drop_write:
 	mnt_drop_write(file->f_path.mnt);
 out_putf:
 	fput(file);
@@ -611,36 +617,29 @@ out:
 asmlinkage long sys_fchmodat(int dfd, const char __user *filename,
 			     mode_t mode)
 {
-	struct nameidata nd;
-	struct inode * inode;
+	struct path path;
+	struct inode *inode;
 	int error;
 	struct iattr newattrs;
 
-	error = __user_walk_fd(dfd, filename, LOOKUP_FOLLOW, &nd);
+	error = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
 	if (error)
 		goto out;
-	inode = nd.path.dentry->d_inode;
+	inode = path.dentry->d_inode;
 
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (error)
 		goto dput_and_out;
-
-	error = -EPERM;
-	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-		goto out_drop_write;
-
 	mutex_lock(&inode->i_mutex);
 	if (mode == (mode_t) -1)
 		mode = inode->i_mode;
 	newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
 	newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
-	error = notify_change(nd.path.dentry, &newattrs);
+	error = notify_change(path.dentry, &newattrs);
 	mutex_unlock(&inode->i_mutex);
-
-out_drop_write:
-	mnt_drop_write(nd.path.mnt);
+	mnt_drop_write(path.mnt);
 dput_and_out:
-	path_put(&nd.path);
+	path_put(&path);
 out:
 	return error;
 }
@@ -652,18 +651,10 @@ asmlinkage long sys_chmod(const char __user *filename, mode_t mode)
 
 static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
 {
-	struct inode * inode;
+	struct inode *inode = dentry->d_inode;
 	int error;
 	struct iattr newattrs;
 
-	error = -ENOENT;
-	if (!(inode = dentry->d_inode)) {
-		printk(KERN_ERR "chown_common: NULL inode\n");
-		goto out;
-	}
-	error = -EPERM;
-	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
-		goto out;
 	newattrs.ia_valid =  ATTR_CTIME;
 	if (user != (uid_t) -1) {
 		newattrs.ia_valid |= ATTR_UID;
@@ -679,25 +670,25 @@ static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
 	mutex_lock(&inode->i_mutex);
 	error = notify_change(dentry, &newattrs);
 	mutex_unlock(&inode->i_mutex);
-out:
+
 	return error;
 }
 
 asmlinkage long sys_chown(const char __user * filename, uid_t user, gid_t group)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = user_path_walk(filename, &nd);
+	error = user_path(filename, &path);
 	if (error)
 		goto out;
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (error)
 		goto out_release;
-	error = chown_common(nd.path.dentry, user, group);
-	mnt_drop_write(nd.path.mnt);
+	error = chown_common(path.dentry, user, group);
+	mnt_drop_write(path.mnt);
 out_release:
-	path_put(&nd.path);
+	path_put(&path);
 out:
 	return error;
 }
@@ -705,7 +696,7 @@ out:
 asmlinkage long sys_fchownat(int dfd, const char __user *filename, uid_t user,
 			     gid_t group, int flag)
 {
-	struct nameidata nd;
+	struct path path;
 	int error = -EINVAL;
 	int follow;
 
@@ -713,35 +704,35 @@ asmlinkage long sys_fchownat(int dfd, const char __user *filename, uid_t user,
 		goto out;
 
 	follow = (flag & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
-	error = __user_walk_fd(dfd, filename, follow, &nd);
+	error = user_path_at(dfd, filename, follow, &path);
 	if (error)
 		goto out;
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (error)
 		goto out_release;
-	error = chown_common(nd.path.dentry, user, group);
-	mnt_drop_write(nd.path.mnt);
+	error = chown_common(path.dentry, user, group);
+	mnt_drop_write(path.mnt);
 out_release:
-	path_put(&nd.path);
+	path_put(&path);
 out:
 	return error;
 }
 
 asmlinkage long sys_lchown(const char __user * filename, uid_t user, gid_t group)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = user_path_walk_link(filename, &nd);
+	error = user_lpath(filename, &path);
 	if (error)
 		goto out;
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (error)
 		goto out_release;
-	error = chown_common(nd.path.dentry, user, group);
-	mnt_drop_write(nd.path.mnt);
+	error = chown_common(path.dentry, user, group);
+	mnt_drop_write(path.mnt);
 out_release:
-	path_put(&nd.path);
+	path_put(&path);
 out:
 	return error;
 }
@@ -981,7 +972,6 @@ int get_unused_fd_flags(int flags)
 	int fd, error;
 	struct fdtable *fdt;
 
-  	error = -EMFILE;
 	spin_lock(&files->file_lock);
 
 repeat:
@@ -989,13 +979,6 @@ repeat:
 	fd = find_next_zero_bit(fdt->open_fds->fds_bits, fdt->max_fds,
 				files->next_fd);
 
-	/*
-	 * N.B. For clone tasks sharing a files structure, this test
-	 * will limit the total number of files that can be opened.
-	 */
-	if (fd >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
-		goto out;
-
 	/* Do we need to expand the fd array or fd set?  */
 	error = expand_files(files, fd);
 	if (error < 0)
@@ -1006,7 +989,6 @@ repeat:
 	 	 * If we needed to expand the fs array we
 		 * might have blocked - try again.
 		 */
-		error = -EMFILE;
 		goto repeat;
 	}
 
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index d17b4fd204e1..9f5b054f06b9 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -430,7 +430,7 @@ static struct file_system_type openprom_fs_type = {
 	.kill_sb	= kill_anon_super,
 };
 
-static void op_inode_init_once(struct kmem_cache * cachep, void *data)
+static void op_inode_init_once(void *data)
 {
 	struct op_inode_info *oi = (struct op_inode_info *) data;
 
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index efef715135d3..7d6b34e201db 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -344,18 +344,18 @@ static ssize_t whole_disk_show(struct device *dev,
 static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH,
 		   whole_disk_show, NULL);
 
-void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags)
+int add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags)
 {
 	struct hd_struct *p;
 	int err;
 
 	p = kzalloc(sizeof(*p), GFP_KERNEL);
 	if (!p)
-		return;
+		return -ENOMEM;
 
 	if (!init_part_stats(p)) {
-		kfree(p);
-		return;
+		err = -ENOMEM;
+		goto out0;
 	}
 	p->start_sect = start;
 	p->nr_sects = len;
@@ -378,15 +378,31 @@ void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len,
 
 	/* delay uevent until 'holders' subdir is created */
 	p->dev.uevent_suppress = 1;
-	device_add(&p->dev);
+	err = device_add(&p->dev);
+	if (err)
+		goto out1;
 	partition_sysfs_add_subdir(p);
 	p->dev.uevent_suppress = 0;
-	if (flags & ADDPART_FLAG_WHOLEDISK)
+	if (flags & ADDPART_FLAG_WHOLEDISK) {
 		err = device_create_file(&p->dev, &dev_attr_whole_disk);
+		if (err)
+			goto out2;
+	}
 
 	/* suppress uevent if the disk supresses it */
 	if (!disk->dev.uevent_suppress)
 		kobject_uevent(&p->dev.kobj, KOBJ_ADD);
+
+	return 0;
+
+out2:
+	device_del(&p->dev);
+out1:
+	put_device(&p->dev);
+	free_part_stats(p);
+out0:
+	kfree(p);
+	return err;
 }
 
 /* Not exported, helper to add_disk(). */
@@ -483,10 +499,16 @@ int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
 		if (!size)
 			continue;
 		if (from + size > get_capacity(disk)) {
-			printk(" %s: p%d exceeds device capacity\n",
+			printk(KERN_ERR " %s: p%d exceeds device capacity\n",
 				disk->disk_name, p);
+			continue;
+		}
+		res = add_partition(disk, p, from, size, state->parts[p].flags);
+		if (res) {
+			printk(KERN_ERR " %s: p%d could not be added: %d\n",
+				disk->disk_name, p, -res);
+			continue;
 		}
-		add_partition(disk, p, from, size, state->parts[p].flags);
 #ifdef CONFIG_BLK_DEV_MD
 		if (state->parts[p].flags & ADDPART_FLAG_RAID)
 			md_autodetect_dev(bdev->bd_dev+p);
diff --git a/fs/partitions/efi.c b/fs/partitions/efi.c
index e7b07006bc41..038a6022152f 100644
--- a/fs/partitions/efi.c
+++ b/fs/partitions/efi.c
@@ -95,13 +95,6 @@
 #include "check.h"
 #include "efi.h"
 
-#undef EFI_DEBUG
-#ifdef EFI_DEBUG
-#define Dprintk(x...) printk(KERN_DEBUG x)
-#else
-#define Dprintk(x...)
-#endif
-
 /* This allows a kernel command line option 'gpt' to override
  * the test for invalid PMBR.  Not __initdata because reloading
  * the partition tables happens after init too.
@@ -305,10 +298,10 @@ is_gpt_valid(struct block_device *bdev, u64 lba,
 
 	/* Check the GUID Partition Table signature */
 	if (le64_to_cpu((*gpt)->signature) != GPT_HEADER_SIGNATURE) {
-		Dprintk("GUID Partition Table Header signature is wrong:"
-			"%lld != %lld\n",
-			(unsigned long long)le64_to_cpu((*gpt)->signature),
-			(unsigned long long)GPT_HEADER_SIGNATURE);
+		pr_debug("GUID Partition Table Header signature is wrong:"
+			 "%lld != %lld\n",
+			 (unsigned long long)le64_to_cpu((*gpt)->signature),
+			 (unsigned long long)GPT_HEADER_SIGNATURE);
 		goto fail;
 	}
 
@@ -318,9 +311,8 @@ is_gpt_valid(struct block_device *bdev, u64 lba,
 	crc = efi_crc32((const unsigned char *) (*gpt), le32_to_cpu((*gpt)->header_size));
 
 	if (crc != origcrc) {
-		Dprintk
-		    ("GUID Partition Table Header CRC is wrong: %x != %x\n",
-		     crc, origcrc);
+		pr_debug("GUID Partition Table Header CRC is wrong: %x != %x\n",
+			 crc, origcrc);
 		goto fail;
 	}
 	(*gpt)->header_crc32 = cpu_to_le32(origcrc);
@@ -328,9 +320,9 @@ is_gpt_valid(struct block_device *bdev, u64 lba,
 	/* Check that the my_lba entry points to the LBA that contains
 	 * the GUID Partition Table */
 	if (le64_to_cpu((*gpt)->my_lba) != lba) {
-		Dprintk("GPT my_lba incorrect: %lld != %lld\n",
-			(unsigned long long)le64_to_cpu((*gpt)->my_lba),
-			(unsigned long long)lba);
+		pr_debug("GPT my_lba incorrect: %lld != %lld\n",
+			 (unsigned long long)le64_to_cpu((*gpt)->my_lba),
+			 (unsigned long long)lba);
 		goto fail;
 	}
 
@@ -339,15 +331,15 @@ is_gpt_valid(struct block_device *bdev, u64 lba,
 	 */
 	lastlba = last_lba(bdev);
 	if (le64_to_cpu((*gpt)->first_usable_lba) > lastlba) {
-		Dprintk("GPT: first_usable_lba incorrect: %lld > %lld\n",
-			(unsigned long long)le64_to_cpu((*gpt)->first_usable_lba),
-			(unsigned long long)lastlba);
+		pr_debug("GPT: first_usable_lba incorrect: %lld > %lld\n",
+			 (unsigned long long)le64_to_cpu((*gpt)->first_usable_lba),
+			 (unsigned long long)lastlba);
 		goto fail;
 	}
 	if (le64_to_cpu((*gpt)->last_usable_lba) > lastlba) {
-		Dprintk("GPT: last_usable_lba incorrect: %lld > %lld\n",
-			(unsigned long long)le64_to_cpu((*gpt)->last_usable_lba),
-			(unsigned long long)lastlba);
+		pr_debug("GPT: last_usable_lba incorrect: %lld > %lld\n",
+			 (unsigned long long)le64_to_cpu((*gpt)->last_usable_lba),
+			 (unsigned long long)lastlba);
 		goto fail;
 	}
 
@@ -360,7 +352,7 @@ is_gpt_valid(struct block_device *bdev, u64 lba,
 			le32_to_cpu((*gpt)->sizeof_partition_entry));
 
 	if (crc != le32_to_cpu((*gpt)->partition_entry_array_crc32)) {
-		Dprintk("GUID Partitition Entry Array CRC check failed.\n");
+		pr_debug("GUID Partitition Entry Array CRC check failed.\n");
 		goto fail_ptes;
 	}
 
@@ -616,7 +608,7 @@ efi_partition(struct parsed_partitions *state, struct block_device *bdev)
 		return 0;
 	}
 
-	Dprintk("GUID Partition Table is valid!  Yea!\n");
+	pr_debug("GUID Partition Table is valid!  Yea!\n");
 
 	for (i = 0; i < le32_to_cpu(gpt->num_partition_entries) && i < state->limit-1; i++) {
 		if (!is_pte_valid(&ptes[i], last_lba(bdev)))
diff --git a/fs/partitions/ldm.c b/fs/partitions/ldm.c
index 0fdda2e8a4cc..8652fb99e962 100644
--- a/fs/partitions/ldm.c
+++ b/fs/partitions/ldm.c
@@ -133,17 +133,17 @@ static bool ldm_parse_privhead(const u8 *data, struct privhead *ph)
 	bool is_vista = false;
 
 	BUG_ON(!data || !ph);
-	if (MAGIC_PRIVHEAD != BE64(data)) {
+	if (MAGIC_PRIVHEAD != get_unaligned_be64(data)) {
 		ldm_error("Cannot find PRIVHEAD structure. LDM database is"
 			" corrupt. Aborting.");
 		return false;
 	}
-	ph->ver_major = BE16(data + 0x000C);
-	ph->ver_minor = BE16(data + 0x000E);
-	ph->logical_disk_start = BE64(data + 0x011B);
-	ph->logical_disk_size = BE64(data + 0x0123);
-	ph->config_start = BE64(data + 0x012B);
-	ph->config_size = BE64(data + 0x0133);
+	ph->ver_major = get_unaligned_be16(data + 0x000C);
+	ph->ver_minor = get_unaligned_be16(data + 0x000E);
+	ph->logical_disk_start = get_unaligned_be64(data + 0x011B);
+	ph->logical_disk_size = get_unaligned_be64(data + 0x0123);
+	ph->config_start = get_unaligned_be64(data + 0x012B);
+	ph->config_size = get_unaligned_be64(data + 0x0133);
 	/* Version 2.11 is Win2k/XP and version 2.12 is Vista. */
 	if (ph->ver_major == 2 && ph->ver_minor == 12)
 		is_vista = true;
@@ -191,14 +191,14 @@ static bool ldm_parse_tocblock (const u8 *data, struct tocblock *toc)
 {
 	BUG_ON (!data || !toc);
 
-	if (MAGIC_TOCBLOCK != BE64 (data)) {
+	if (MAGIC_TOCBLOCK != get_unaligned_be64(data)) {
 		ldm_crit ("Cannot find TOCBLOCK, database may be corrupt.");
 		return false;
 	}
 	strncpy (toc->bitmap1_name, data + 0x24, sizeof (toc->bitmap1_name));
 	toc->bitmap1_name[sizeof (toc->bitmap1_name) - 1] = 0;
-	toc->bitmap1_start = BE64 (data + 0x2E);
-	toc->bitmap1_size  = BE64 (data + 0x36);
+	toc->bitmap1_start = get_unaligned_be64(data + 0x2E);
+	toc->bitmap1_size  = get_unaligned_be64(data + 0x36);
 
 	if (strncmp (toc->bitmap1_name, TOC_BITMAP1,
 			sizeof (toc->bitmap1_name)) != 0) {
@@ -208,8 +208,8 @@ static bool ldm_parse_tocblock (const u8 *data, struct tocblock *toc)
 	}
 	strncpy (toc->bitmap2_name, data + 0x46, sizeof (toc->bitmap2_name));
 	toc->bitmap2_name[sizeof (toc->bitmap2_name) - 1] = 0;
-	toc->bitmap2_start = BE64 (data + 0x50);
-	toc->bitmap2_size  = BE64 (data + 0x58);
+	toc->bitmap2_start = get_unaligned_be64(data + 0x50);
+	toc->bitmap2_size  = get_unaligned_be64(data + 0x58);
 	if (strncmp (toc->bitmap2_name, TOC_BITMAP2,
 			sizeof (toc->bitmap2_name)) != 0) {
 		ldm_crit ("TOCBLOCK's second bitmap is '%s', should be '%s'.",
@@ -237,22 +237,22 @@ static bool ldm_parse_vmdb (const u8 *data, struct vmdb *vm)
 {
 	BUG_ON (!data || !vm);
 
-	if (MAGIC_VMDB != BE32 (data)) {
+	if (MAGIC_VMDB != get_unaligned_be32(data)) {
 		ldm_crit ("Cannot find the VMDB, database may be corrupt.");
 		return false;
 	}
 
-	vm->ver_major = BE16 (data + 0x12);
-	vm->ver_minor = BE16 (data + 0x14);
+	vm->ver_major = get_unaligned_be16(data + 0x12);
+	vm->ver_minor = get_unaligned_be16(data + 0x14);
 	if ((vm->ver_major != 4) || (vm->ver_minor != 10)) {
 		ldm_error ("Expected VMDB version %d.%d, got %d.%d. "
 			"Aborting.", 4, 10, vm->ver_major, vm->ver_minor);
 		return false;
 	}
 
-	vm->vblk_size     = BE32 (data + 0x08);
-	vm->vblk_offset   = BE32 (data + 0x0C);
-	vm->last_vblk_seq = BE32 (data + 0x04);
+	vm->vblk_size     = get_unaligned_be32(data + 0x08);
+	vm->vblk_offset   = get_unaligned_be32(data + 0x0C);
+	vm->last_vblk_seq = get_unaligned_be32(data + 0x04);
 
 	ldm_debug ("Parsed VMDB successfully.");
 	return true;
@@ -507,7 +507,7 @@ static bool ldm_validate_vmdb (struct block_device *bdev, unsigned long base,
 		goto out;				/* Already logged */
 
 	/* Are there uncommitted transactions? */
-	if (BE16(data + 0x10) != 0x01) {
+	if (get_unaligned_be16(data + 0x10) != 0x01) {
 		ldm_crit ("Database is not in a consistent state.  Aborting.");
 		goto out;
 	}
@@ -802,7 +802,7 @@ static bool ldm_parse_cmp3 (const u8 *buffer, int buflen, struct vblk *vb)
 		return false;
 
 	len += VBLK_SIZE_CMP3;
-	if (len != BE32 (buffer + 0x14))
+	if (len != get_unaligned_be32(buffer + 0x14))
 		return false;
 
 	comp = &vb->vblk.comp;
@@ -851,7 +851,7 @@ static int ldm_parse_dgr3 (const u8 *buffer, int buflen, struct vblk *vb)
 		return false;
 
 	len += VBLK_SIZE_DGR3;
-	if (len != BE32 (buffer + 0x14))
+	if (len != get_unaligned_be32(buffer + 0x14))
 		return false;
 
 	dgrp = &vb->vblk.dgrp;
@@ -895,7 +895,7 @@ static bool ldm_parse_dgr4 (const u8 *buffer, int buflen, struct vblk *vb)
 		return false;
 
 	len += VBLK_SIZE_DGR4;
-	if (len != BE32 (buffer + 0x14))
+	if (len != get_unaligned_be32(buffer + 0x14))
 		return false;
 
 	dgrp = &vb->vblk.dgrp;
@@ -931,7 +931,7 @@ static bool ldm_parse_dsk3 (const u8 *buffer, int buflen, struct vblk *vb)
 		return false;
 
 	len += VBLK_SIZE_DSK3;
-	if (len != BE32 (buffer + 0x14))
+	if (len != get_unaligned_be32(buffer + 0x14))
 		return false;
 
 	disk = &vb->vblk.disk;
@@ -968,7 +968,7 @@ static bool ldm_parse_dsk4 (const u8 *buffer, int buflen, struct vblk *vb)
 		return false;
 
 	len += VBLK_SIZE_DSK4;
-	if (len != BE32 (buffer + 0x14))
+	if (len != get_unaligned_be32(buffer + 0x14))
 		return false;
 
 	disk = &vb->vblk.disk;
@@ -1034,14 +1034,14 @@ static bool ldm_parse_prt3(const u8 *buffer, int buflen, struct vblk *vb)
 		return false;
 	}
 	len += VBLK_SIZE_PRT3;
-	if (len > BE32(buffer + 0x14)) {
+	if (len > get_unaligned_be32(buffer + 0x14)) {
 		ldm_error("len %d > BE32(buffer + 0x14) %d", len,
-				BE32(buffer + 0x14));
+				get_unaligned_be32(buffer + 0x14));
 		return false;
 	}
 	part = &vb->vblk.part;
-	part->start = BE64(buffer + 0x24 + r_name);
-	part->volume_offset = BE64(buffer + 0x2C + r_name);
+	part->start = get_unaligned_be64(buffer + 0x24 + r_name);
+	part->volume_offset = get_unaligned_be64(buffer + 0x2C + r_name);
 	part->size = ldm_get_vnum(buffer + 0x34 + r_name);
 	part->parent_id = ldm_get_vnum(buffer + 0x34 + r_size);
 	part->disk_id = ldm_get_vnum(buffer + 0x34 + r_parent);
@@ -1139,9 +1139,9 @@ static bool ldm_parse_vol5(const u8 *buffer, int buflen, struct vblk *vb)
 		return false;
 	}
 	len += VBLK_SIZE_VOL5;
-	if (len > BE32(buffer + 0x14)) {
+	if (len > get_unaligned_be32(buffer + 0x14)) {
 		ldm_error("len %d > BE32(buffer + 0x14) %d", len,
-				BE32(buffer + 0x14));
+				get_unaligned_be32(buffer + 0x14));
 		return false;
 	}
 	volu = &vb->vblk.volu;
@@ -1294,9 +1294,9 @@ static bool ldm_frag_add (const u8 *data, int size, struct list_head *frags)
 
 	BUG_ON (!data || !frags);
 
-	group = BE32 (data + 0x08);
-	rec   = BE16 (data + 0x0C);
-	num   = BE16 (data + 0x0E);
+	group = get_unaligned_be32(data + 0x08);
+	rec   = get_unaligned_be16(data + 0x0C);
+	num   = get_unaligned_be16(data + 0x0E);
 	if ((num < 1) || (num > 4)) {
 		ldm_error ("A VBLK claims to have %d parts.", num);
 		return false;
@@ -1425,12 +1425,12 @@ static bool ldm_get_vblks (struct block_device *bdev, unsigned long base,
 		}
 
 		for (v = 0; v < perbuf; v++, data+=size) {  /* For each vblk */
-			if (MAGIC_VBLK != BE32 (data)) {
+			if (MAGIC_VBLK != get_unaligned_be32(data)) {
 				ldm_error ("Expected to find a VBLK.");
 				goto out;
 			}
 
-			recs = BE16 (data + 0x0E);	/* Number of records */
+			recs = get_unaligned_be16(data + 0x0E);	/* Number of records */
 			if (recs == 1) {
 				if (!ldm_ldmdb_add (data, size, ldb))
 					goto out;	/* Already logged */
diff --git a/fs/partitions/ldm.h b/fs/partitions/ldm.h
index 80f63b5fdd9f..30e08e809c1d 100644
--- a/fs/partitions/ldm.h
+++ b/fs/partitions/ldm.h
@@ -98,11 +98,6 @@ struct parsed_partitions;
 #define TOC_BITMAP1		"config"	/* Names of the two defined */
 #define TOC_BITMAP2		"log"		/* bitmaps in the TOCBLOCK. */
 
-/* Most numbers we deal with are big-endian and won't be aligned. */
-#define BE16(x)			((u16)be16_to_cpu(get_unaligned((__be16*)(x))))
-#define BE32(x)			((u32)be32_to_cpu(get_unaligned((__be32*)(x))))
-#define BE64(x)			((u64)be64_to_cpu(get_unaligned((__be64*)(x))))
-
 /* Borrowed from msdos.c */
 #define SYS_IND(p)		(get_unaligned(&(p)->sys_ind))
 
diff --git a/fs/pipe.c b/fs/pipe.c
index 700f4e0d9572..fcba6542b8d0 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -777,45 +777,10 @@ pipe_rdwr_open(struct inode *inode, struct file *filp)
 /*
  * The file_operations structs are not static because they
  * are also used in linux/fs/fifo.c to do operations on FIFOs.
+ *
+ * Pipes reuse fifos' file_operations structs.
  */
-const struct file_operations read_fifo_fops = {
-	.llseek		= no_llseek,
-	.read		= do_sync_read,
-	.aio_read	= pipe_read,
-	.write		= bad_pipe_w,
-	.poll		= pipe_poll,
-	.unlocked_ioctl	= pipe_ioctl,
-	.open		= pipe_read_open,
-	.release	= pipe_read_release,
-	.fasync		= pipe_read_fasync,
-};
-
-const struct file_operations write_fifo_fops = {
-	.llseek		= no_llseek,
-	.read		= bad_pipe_r,
-	.write		= do_sync_write,
-	.aio_write	= pipe_write,
-	.poll		= pipe_poll,
-	.unlocked_ioctl	= pipe_ioctl,
-	.open		= pipe_write_open,
-	.release	= pipe_write_release,
-	.fasync		= pipe_write_fasync,
-};
-
-const struct file_operations rdwr_fifo_fops = {
-	.llseek		= no_llseek,
-	.read		= do_sync_read,
-	.aio_read	= pipe_read,
-	.write		= do_sync_write,
-	.aio_write	= pipe_write,
-	.poll		= pipe_poll,
-	.unlocked_ioctl	= pipe_ioctl,
-	.open		= pipe_rdwr_open,
-	.release	= pipe_rdwr_release,
-	.fasync		= pipe_rdwr_fasync,
-};
-
-static const struct file_operations read_pipe_fops = {
+const struct file_operations read_pipefifo_fops = {
 	.llseek		= no_llseek,
 	.read		= do_sync_read,
 	.aio_read	= pipe_read,
@@ -827,7 +792,7 @@ static const struct file_operations read_pipe_fops = {
 	.fasync		= pipe_read_fasync,
 };
 
-static const struct file_operations write_pipe_fops = {
+const struct file_operations write_pipefifo_fops = {
 	.llseek		= no_llseek,
 	.read		= bad_pipe_r,
 	.write		= do_sync_write,
@@ -839,7 +804,7 @@ static const struct file_operations write_pipe_fops = {
 	.fasync		= pipe_write_fasync,
 };
 
-static const struct file_operations rdwr_pipe_fops = {
+const struct file_operations rdwr_pipefifo_fops = {
 	.llseek		= no_llseek,
 	.read		= do_sync_read,
 	.aio_read	= pipe_read,
@@ -927,7 +892,7 @@ static struct inode * get_pipe_inode(void)
 	inode->i_pipe = pipe;
 
 	pipe->readers = pipe->writers = 1;
-	inode->i_fop = &rdwr_pipe_fops;
+	inode->i_fop = &rdwr_pipefifo_fops;
 
 	/*
 	 * Mark the inode dirty from the very beginning,
@@ -950,7 +915,7 @@ fail_inode:
 	return NULL;
 }
 
-struct file *create_write_pipe(void)
+struct file *create_write_pipe(int flags)
 {
 	int err;
 	struct inode *inode;
@@ -978,12 +943,12 @@ struct file *create_write_pipe(void)
 	d_instantiate(dentry, inode);
 
 	err = -ENFILE;
-	f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipe_fops);
+	f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipefifo_fops);
 	if (!f)
 		goto err_dentry;
 	f->f_mapping = inode->i_mapping;
 
-	f->f_flags = O_WRONLY;
+	f->f_flags = O_WRONLY | (flags & O_NONBLOCK);
 	f->f_version = 0;
 
 	return f;
@@ -1007,7 +972,7 @@ void free_write_pipe(struct file *f)
 	put_filp(f);
 }
 
-struct file *create_read_pipe(struct file *wrf)
+struct file *create_read_pipe(struct file *wrf, int flags)
 {
 	struct file *f = get_empty_filp();
 	if (!f)
@@ -1019,34 +984,37 @@ struct file *create_read_pipe(struct file *wrf)
 	f->f_mapping = wrf->f_path.dentry->d_inode->i_mapping;
 
 	f->f_pos = 0;
-	f->f_flags = O_RDONLY;
-	f->f_op = &read_pipe_fops;
+	f->f_flags = O_RDONLY | (flags & O_NONBLOCK);
+	f->f_op = &read_pipefifo_fops;
 	f->f_mode = FMODE_READ;
 	f->f_version = 0;
 
 	return f;
 }
 
-int do_pipe(int *fd)
+int do_pipe_flags(int *fd, int flags)
 {
 	struct file *fw, *fr;
 	int error;
 	int fdw, fdr;
 
-	fw = create_write_pipe();
+	if (flags & ~(O_CLOEXEC | O_NONBLOCK))
+		return -EINVAL;
+
+	fw = create_write_pipe(flags);
 	if (IS_ERR(fw))
 		return PTR_ERR(fw);
-	fr = create_read_pipe(fw);
+	fr = create_read_pipe(fw, flags);
 	error = PTR_ERR(fr);
 	if (IS_ERR(fr))
 		goto err_write_pipe;
 
-	error = get_unused_fd();
+	error = get_unused_fd_flags(flags);
 	if (error < 0)
 		goto err_read_pipe;
 	fdr = error;
 
-	error = get_unused_fd();
+	error = get_unused_fd_flags(flags);
 	if (error < 0)
 		goto err_fdr;
 	fdw = error;
@@ -1074,16 +1042,21 @@ int do_pipe(int *fd)
 	return error;
 }
 
+int do_pipe(int *fd)
+{
+	return do_pipe_flags(fd, 0);
+}
+
 /*
  * sys_pipe() is the normal C calling standard for creating
  * a pipe. It's not the way Unix traditionally does this, though.
  */
-asmlinkage long __weak sys_pipe(int __user *fildes)
+asmlinkage long __weak sys_pipe2(int __user *fildes, int flags)
 {
 	int fd[2];
 	int error;
 
-	error = do_pipe(fd);
+	error = do_pipe_flags(fd, flags);
 	if (!error) {
 		if (copy_to_user(fildes, fd, sizeof(fd))) {
 			sys_close(fd[0]);
@@ -1094,6 +1067,11 @@ asmlinkage long __weak sys_pipe(int __user *fildes)
 	return error;
 }
 
+asmlinkage long __weak sys_pipe(int __user *fildes)
+{
+	return sys_pipe2(fildes, 0);
+}
+
 /*
  * pipefs should _never_ be mounted by userland - too much of security hassle,
  * no real gain from having the whole whorehouse mounted. So we don't need
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
new file mode 100644
index 000000000000..73cd7a418f06
--- /dev/null
+++ b/fs/proc/Kconfig
@@ -0,0 +1,59 @@
+config PROC_FS
+	bool "/proc file system support" if EMBEDDED
+	default y
+	help
+	  This is a virtual file system providing information about the status
+	  of the system. "Virtual" means that it doesn't take up any space on
+	  your hard disk: the files are created on the fly by the kernel when
+	  you try to access them. Also, you cannot read the files with older
+	  version of the program less: you need to use more or cat.
+
+	  It's totally cool; for example, "cat /proc/interrupts" gives
+	  information about what the different IRQs are used for at the moment
+	  (there is a small number of Interrupt ReQuest lines in your computer
+	  that are used by the attached devices to gain the CPU's attention --
+	  often a source of trouble if two devices are mistakenly configured
+	  to use the same IRQ). The program procinfo to display some
+	  information about your system gathered from the /proc file system.
+
+	  Before you can use the /proc file system, it has to be mounted,
+	  meaning it has to be given a location in the directory hierarchy.
+	  That location should be /proc. A command such as "mount -t proc proc
+	  /proc" or the equivalent line in /etc/fstab does the job.
+
+	  The /proc file system is explained in the file
+	  <file:Documentation/filesystems/proc.txt> and on the proc(5) manpage
+	  ("man 5 proc").
+
+	  This option will enlarge your kernel by about 67 KB. Several
+	  programs depend on this, so everyone should say Y here.
+
+config PROC_KCORE
+	bool "/proc/kcore support" if !ARM
+	depends on PROC_FS && MMU
+
+config PROC_VMCORE
+        bool "/proc/vmcore support (EXPERIMENTAL)"
+        depends on PROC_FS && CRASH_DUMP
+	default y
+        help
+        Exports the dump image of crashed kernel in ELF format.
+
+config PROC_SYSCTL
+	bool "Sysctl support (/proc/sys)" if EMBEDDED
+	depends on PROC_FS
+	select SYSCTL
+	default y
+	---help---
+	  The sysctl interface provides a means of dynamically changing
+	  certain kernel parameters and variables on the fly without requiring
+	  a recompile of the kernel or reboot of the system.  The primary
+	  interface is through /proc/sys.  If you say Y here a tree of
+	  modifiable sysctl entries will be generated beneath the
+          /proc/sys directory. They are explained in the files
+	  in <file:Documentation/sysctl/>.  Note that enabling this
+	  option will enlarge the kernel by at least 8 KB.
+
+	  As it is generally a good thing, you should say Y here unless
+	  building a kernel for install/rescue disks or your system is very
+	  limited in memory.
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 797d775e0354..0d6eb33597c6 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -80,6 +80,7 @@
 #include <linux/delayacct.h>
 #include <linux/seq_file.h>
 #include <linux/pid_namespace.h>
+#include <linux/tracehook.h>
 
 #include <asm/pgtable.h>
 #include <asm/processor.h>
@@ -168,8 +169,12 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
 	rcu_read_lock();
 	ppid = pid_alive(p) ?
 		task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0;
-	tpid = pid_alive(p) && p->ptrace ?
-		task_pid_nr_ns(rcu_dereference(p->parent), ns) : 0;
+	tpid = 0;
+	if (pid_alive(p)) {
+		struct task_struct *tracer = tracehook_tracer_task(p);
+		if (tracer)
+			tpid = task_pid_nr_ns(tracer, ns);
+	}
 	seq_printf(m,
 		"State:\t%s\n"
 		"Tgid:\t%d\n"
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 58c3e6a8e15e..e74308bdabd3 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -69,6 +69,7 @@
 #include <linux/mount.h>
 #include <linux/security.h>
 #include <linux/ptrace.h>
+#include <linux/tracehook.h>
 #include <linux/cgroup.h>
 #include <linux/cpuset.h>
 #include <linux/audit.h>
@@ -231,10 +232,14 @@ static int check_mem_permission(struct task_struct *task)
 	 * If current is actively ptrace'ing, and would also be
 	 * permitted to freshly attach with ptrace now, permit it.
 	 */
-	if (task->parent == current && (task->ptrace & PT_PTRACED) &&
-	    task_is_stopped_or_traced(task) &&
-	    ptrace_may_access(task, PTRACE_MODE_ATTACH))
-		return 0;
+	if (task_is_stopped_or_traced(task)) {
+		int match;
+		rcu_read_lock();
+		match = (tracehook_tracer_task(task) == current);
+		rcu_read_unlock();
+		if (match && ptrace_may_access(task, PTRACE_MODE_ATTACH))
+			return 0;
+	}
 
 	/*
 	 * Noone else is allowed.
@@ -504,6 +509,26 @@ static int proc_pid_limits(struct task_struct *task, char *buffer)
 	return count;
 }
 
+#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
+static int proc_pid_syscall(struct task_struct *task, char *buffer)
+{
+	long nr;
+	unsigned long args[6], sp, pc;
+
+	if (task_current_syscall(task, &nr, args, 6, &sp, &pc))
+		return sprintf(buffer, "running\n");
+
+	if (nr < 0)
+		return sprintf(buffer, "%ld 0x%lx 0x%lx\n", nr, sp, pc);
+
+	return sprintf(buffer,
+		       "%ld 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
+		       nr,
+		       args[0], args[1], args[2], args[3], args[4], args[5],
+		       sp, pc);
+}
+#endif /* CONFIG_HAVE_ARCH_TRACEHOOK */
+
 /************************************************************************/
 /*                       Here the fs part begins                        */
 /************************************************************************/
@@ -1834,8 +1859,7 @@ static const struct file_operations proc_fd_operations = {
  * /proc/pid/fd needs a special permission handler so that a process can still
  * access /proc/self/fd after it has executed a setuid().
  */
-static int proc_fd_permission(struct inode *inode, int mask,
-				struct nameidata *nd)
+static int proc_fd_permission(struct inode *inode, int mask)
 {
 	int rv;
 
@@ -2376,29 +2400,70 @@ static int proc_base_fill_cache(struct file *filp, void *dirent,
 }
 
 #ifdef CONFIG_TASK_IO_ACCOUNTING
-static int proc_pid_io_accounting(struct task_struct *task, char *buffer)
-{
+static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
+{
+	u64 rchar, wchar, syscr, syscw;
+	struct task_io_accounting ioac;
+
+	rchar = task->rchar;
+	wchar = task->wchar;
+	syscr = task->syscr;
+	syscw = task->syscw;
+	memcpy(&ioac, &task->ioac, sizeof(ioac));
+
+	if (whole) {
+		unsigned long flags;
+
+		if (lock_task_sighand(task, &flags)) {
+			struct signal_struct *sig = task->signal;
+			struct task_struct *t = task;
+
+			rchar += sig->rchar;
+			wchar += sig->wchar;
+			syscr += sig->syscr;
+			syscw += sig->syscw;
+
+			ioac.read_bytes += sig->ioac.read_bytes;
+			ioac.write_bytes += sig->ioac.write_bytes;
+			ioac.cancelled_write_bytes +=
+					sig->ioac.cancelled_write_bytes;
+			while_each_thread(task, t) {
+				rchar += t->rchar;
+				wchar += t->wchar;
+				syscr += t->syscr;
+				syscw += t->syscw;
+
+				ioac.read_bytes += t->ioac.read_bytes;
+				ioac.write_bytes += t->ioac.write_bytes;
+				ioac.cancelled_write_bytes +=
+					t->ioac.cancelled_write_bytes;
+			}
+			unlock_task_sighand(task, &flags);
+		}
+	}
 	return sprintf(buffer,
-#ifdef CONFIG_TASK_XACCT
 			"rchar: %llu\n"
 			"wchar: %llu\n"
 			"syscr: %llu\n"
 			"syscw: %llu\n"
-#endif
 			"read_bytes: %llu\n"
 			"write_bytes: %llu\n"
 			"cancelled_write_bytes: %llu\n",
-#ifdef CONFIG_TASK_XACCT
-			(unsigned long long)task->rchar,
-			(unsigned long long)task->wchar,
-			(unsigned long long)task->syscr,
-			(unsigned long long)task->syscw,
-#endif
-			(unsigned long long)task->ioac.read_bytes,
-			(unsigned long long)task->ioac.write_bytes,
-			(unsigned long long)task->ioac.cancelled_write_bytes);
+			rchar, wchar, syscr, syscw,
+			ioac.read_bytes, ioac.write_bytes,
+			ioac.cancelled_write_bytes);
+}
+
+static int proc_tid_io_accounting(struct task_struct *task, char *buffer)
+{
+	return do_io_accounting(task, buffer, 0);
 }
-#endif
+
+static int proc_tgid_io_accounting(struct task_struct *task, char *buffer)
+{
+	return do_io_accounting(task, buffer, 1);
+}
+#endif /* CONFIG_TASK_IO_ACCOUNTING */
 
 /*
  * Thread groups
@@ -2420,6 +2485,9 @@ static const struct pid_entry tgid_base_stuff[] = {
 #ifdef CONFIG_SCHED_DEBUG
 	REG("sched",      S_IRUGO|S_IWUSR, pid_sched),
 #endif
+#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
+	INF("syscall",    S_IRUSR, pid_syscall),
+#endif
 	INF("cmdline",    S_IRUGO, pid_cmdline),
 	ONE("stat",       S_IRUGO, tgid_stat),
 	ONE("statm",      S_IRUGO, pid_statm),
@@ -2470,7 +2538,7 @@ static const struct pid_entry tgid_base_stuff[] = {
 	REG("coredump_filter", S_IRUGO|S_IWUSR, coredump_filter),
 #endif
 #ifdef CONFIG_TASK_IO_ACCOUNTING
-	INF("io",	S_IRUGO, pid_io_accounting),
+	INF("io",	S_IRUGO, tgid_io_accounting),
 #endif
 };
 
@@ -2752,6 +2820,9 @@ static const struct pid_entry tid_base_stuff[] = {
 #ifdef CONFIG_SCHED_DEBUG
 	REG("sched",     S_IRUGO|S_IWUSR, pid_sched),
 #endif
+#ifdef CONFIG_HAVE_ARCH_TRACEHOOK
+	INF("syscall",   S_IRUSR, pid_syscall),
+#endif
 	INF("cmdline",   S_IRUGO, pid_cmdline),
 	ONE("stat",      S_IRUGO, tid_stat),
 	ONE("statm",     S_IRUGO, pid_statm),
@@ -2797,6 +2868,9 @@ static const struct pid_entry tid_base_stuff[] = {
 #ifdef CONFIG_FAULT_INJECTION
 	REG("make-it-fail", S_IRUGO|S_IWUSR, fault_inject),
 #endif
+#ifdef CONFIG_TASK_IO_ACCOUNTING
+	INF("io",	S_IRUGO, tid_io_accounting),
+#endif
 };
 
 static int proc_tid_base_readdir(struct file * filp,
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 43e54e86cefd..cb4096cc3fb7 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -597,6 +597,7 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
 	ent->pde_users = 0;
 	spin_lock_init(&ent->pde_unload_lock);
 	ent->pde_unload_completion = NULL;
+	INIT_LIST_HEAD(&ent->pde_openers);
  out:
 	return ent;
 }
@@ -789,15 +790,25 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 	spin_unlock(&de->pde_unload_lock);
 
 continue_removing:
+	spin_lock(&de->pde_unload_lock);
+	while (!list_empty(&de->pde_openers)) {
+		struct pde_opener *pdeo;
+
+		pdeo = list_first_entry(&de->pde_openers, struct pde_opener, lh);
+		list_del(&pdeo->lh);
+		spin_unlock(&de->pde_unload_lock);
+		pdeo->release(pdeo->inode, pdeo->file);
+		kfree(pdeo);
+		spin_lock(&de->pde_unload_lock);
+	}
+	spin_unlock(&de->pde_unload_lock);
+
 	if (S_ISDIR(de->mode))
 		parent->nlink--;
 	de->nlink = 0;
-	if (de->subdir) {
-		printk(KERN_WARNING "%s: removing non-empty directory "
+	WARN(de->subdir, KERN_WARNING "%s: removing non-empty directory "
 			"'%s/%s', leaking at least '%s'\n", __func__,
 			de->parent->name, de->name, de->subdir->name);
-		WARN_ON(1);
-	}
 	if (atomic_dec_and_test(&de->count))
 		free_proc_entry(de);
 }
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index b08d10017911..8bb03f056c28 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -17,6 +17,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/smp_lock.h>
+#include <linux/sysctl.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -65,6 +66,8 @@ static void proc_delete_inode(struct inode *inode)
 			module_put(de->owner);
 		de_put(de);
 	}
+	if (PROC_I(inode)->sysctl)
+		sysctl_head_put(PROC_I(inode)->sysctl);
 	clear_inode(inode);
 }
 
@@ -84,6 +87,8 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
 	ei->fd = 0;
 	ei->op.proc_get_link = NULL;
 	ei->pde = NULL;
+	ei->sysctl = NULL;
+	ei->sysctl_entry = NULL;
 	inode = &ei->vfs_inode;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 	return inode;
@@ -94,7 +99,7 @@ static void proc_destroy_inode(struct inode *inode)
 	kmem_cache_free(proc_inode_cachep, PROC_I(inode));
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct proc_inode *ei = (struct proc_inode *) foo;
 
@@ -111,27 +116,25 @@ int __init proc_init_inodecache(void)
 	return 0;
 }
 
-static int proc_remount(struct super_block *sb, int *flags, char *data)
-{
-	*flags |= MS_NODIRATIME;
-	return 0;
-}
-
 static const struct super_operations proc_sops = {
 	.alloc_inode	= proc_alloc_inode,
 	.destroy_inode	= proc_destroy_inode,
 	.drop_inode	= generic_delete_inode,
 	.delete_inode	= proc_delete_inode,
 	.statfs		= simple_statfs,
-	.remount_fs	= proc_remount,
 };
 
-static void pde_users_dec(struct proc_dir_entry *pde)
+static void __pde_users_dec(struct proc_dir_entry *pde)
 {
-	spin_lock(&pde->pde_unload_lock);
 	pde->pde_users--;
 	if (pde->pde_unload_completion && pde->pde_users == 0)
 		complete(pde->pde_unload_completion);
+}
+
+static void pde_users_dec(struct proc_dir_entry *pde)
+{
+	spin_lock(&pde->pde_unload_lock);
+	__pde_users_dec(pde);
 	spin_unlock(&pde->pde_unload_lock);
 }
 
@@ -318,36 +321,97 @@ static int proc_reg_open(struct inode *inode, struct file *file)
 	struct proc_dir_entry *pde = PDE(inode);
 	int rv = 0;
 	int (*open)(struct inode *, struct file *);
+	int (*release)(struct inode *, struct file *);
+	struct pde_opener *pdeo;
+
+	/*
+	 * What for, you ask? Well, we can have open, rmmod, remove_proc_entry
+	 * sequence. ->release won't be called because ->proc_fops will be
+	 * cleared. Depending on complexity of ->release, consequences vary.
+	 *
+	 * We can't wait for mercy when close will be done for real, it's
+	 * deadlockable: rmmod foo </proc/foo . So, we're going to do ->release
+	 * by hand in remove_proc_entry(). For this, save opener's credentials
+	 * for later.
+	 */
+	pdeo = kmalloc(sizeof(struct pde_opener), GFP_KERNEL);
+	if (!pdeo)
+		return -ENOMEM;
 
 	spin_lock(&pde->pde_unload_lock);
 	if (!pde->proc_fops) {
 		spin_unlock(&pde->pde_unload_lock);
+		kfree(pdeo);
 		return rv;
 	}
 	pde->pde_users++;
 	open = pde->proc_fops->open;
+	release = pde->proc_fops->release;
 	spin_unlock(&pde->pde_unload_lock);
 
 	if (open)
 		rv = open(inode, file);
 
-	pde_users_dec(pde);
+	spin_lock(&pde->pde_unload_lock);
+	if (rv == 0 && release) {
+		/* To know what to release. */
+		pdeo->inode = inode;
+		pdeo->file = file;
+		/* Strictly for "too late" ->release in proc_reg_release(). */
+		pdeo->release = release;
+		list_add(&pdeo->lh, &pde->pde_openers);
+	} else
+		kfree(pdeo);
+	__pde_users_dec(pde);
+	spin_unlock(&pde->pde_unload_lock);
 	return rv;
 }
 
+static struct pde_opener *find_pde_opener(struct proc_dir_entry *pde,
+					struct inode *inode, struct file *file)
+{
+	struct pde_opener *pdeo;
+
+	list_for_each_entry(pdeo, &pde->pde_openers, lh) {
+		if (pdeo->inode == inode && pdeo->file == file)
+			return pdeo;
+	}
+	return NULL;
+}
+
 static int proc_reg_release(struct inode *inode, struct file *file)
 {
 	struct proc_dir_entry *pde = PDE(inode);
 	int rv = 0;
 	int (*release)(struct inode *, struct file *);
+	struct pde_opener *pdeo;
 
 	spin_lock(&pde->pde_unload_lock);
+	pdeo = find_pde_opener(pde, inode, file);
 	if (!pde->proc_fops) {
-		spin_unlock(&pde->pde_unload_lock);
+		/*
+		 * Can't simply exit, __fput() will think that everything is OK,
+		 * and move on to freeing struct file. remove_proc_entry() will
+		 * find slacker in opener's list and will try to do non-trivial
+		 * things with struct file. Therefore, remove opener from list.
+		 *
+		 * But if opener is removed from list, who will ->release it?
+		 */
+		if (pdeo) {
+			list_del(&pdeo->lh);
+			spin_unlock(&pde->pde_unload_lock);
+			rv = pdeo->release(inode, file);
+			kfree(pdeo);
+		} else
+			spin_unlock(&pde->pde_unload_lock);
 		return rv;
 	}
 	pde->pde_users++;
 	release = pde->proc_fops->release;
+	if (pdeo) {
+		list_del(&pdeo->lh);
+		kfree(pdeo);
+	}
 	spin_unlock(&pde->pde_unload_lock);
 
 	if (release)
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 28cbca805905..442202314d53 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -63,6 +63,7 @@ extern const struct file_operations proc_smaps_operations;
 extern const struct file_operations proc_clear_refs_operations;
 extern const struct file_operations proc_pagemap_operations;
 extern const struct file_operations proc_net_operations;
+extern const struct file_operations proc_kmsg_operations;
 extern const struct inode_operations proc_net_inode_operations;
 
 void free_proc_entry(struct proc_dir_entry *de);
@@ -88,3 +89,10 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
 		struct dentry *dentry);
 int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
 		filldir_t filldir);
+
+struct pde_opener {
+	struct inode *inode;
+	struct file *file;
+	int (*release)(struct inode *, struct file *);
+	struct list_head lh;
+};
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index e78c81fcf547..c2370c76fb71 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -23,6 +23,10 @@
 
 #define CORE_STR "CORE"
 
+#ifndef ELF_CORE_EFLAGS
+#define ELF_CORE_EFLAGS	0
+#endif
+
 static int open_kcore(struct inode * inode, struct file * filp)
 {
 	return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
@@ -164,11 +168,7 @@ static void elf_kcore_store_hdr(char *bufp, int nphdr, int dataoff)
 	elf->e_entry	= 0;
 	elf->e_phoff	= sizeof(struct elfhdr);
 	elf->e_shoff	= 0;
-#if defined(CONFIG_H8300)
-	elf->e_flags	= ELF_FLAGS;
-#else
-	elf->e_flags	= 0;
-#endif
+	elf->e_flags	= ELF_CORE_EFLAGS;
 	elf->e_ehsize	= sizeof(struct elfhdr);
 	elf->e_phentsize= sizeof(struct elf_phdr);
 	elf->e_phnum	= nphdr;
diff --git a/fs/proc/kmsg.c b/fs/proc/kmsg.c
index ff3b90b56e9d..9fd5df3f40ce 100644
--- a/fs/proc/kmsg.c
+++ b/fs/proc/kmsg.c
@@ -15,6 +15,8 @@
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
+#include "internal.h"
+
 extern wait_queue_head_t log_wait;
 
 extern int do_syslog(int type, char __user *bug, int count);
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index c652d469dc08..ded969862960 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -232,7 +232,6 @@ static int meminfo_read_proc(char *page, char **start, off_t off,
 #undef K
 }
 
-extern const struct seq_operations fragmentation_op;
 static int fragmentation_open(struct inode *inode, struct file *file)
 {
 	(void)inode;
@@ -246,7 +245,6 @@ static const struct file_operations fragmentation_file_operations = {
 	.release	= seq_release,
 };
 
-extern const struct seq_operations pagetypeinfo_op;
 static int pagetypeinfo_open(struct inode *inode, struct file *file)
 {
 	return seq_open(file, &pagetypeinfo_op);
@@ -259,7 +257,6 @@ static const struct file_operations pagetypeinfo_file_ops = {
 	.release	= seq_release,
 };
 
-extern const struct seq_operations zoneinfo_op;
 static int zoneinfo_open(struct inode *inode, struct file *file)
 {
 	return seq_open(file, &zoneinfo_op);
@@ -356,7 +353,6 @@ static const struct file_operations proc_devinfo_operations = {
 	.release	= seq_release,
 };
 
-extern const struct seq_operations vmstat_op;
 static int vmstat_open(struct inode *inode, struct file *file)
 {
 	return seq_open(file, &vmstat_op);
@@ -468,14 +464,25 @@ static const struct file_operations proc_slabstats_operations = {
 #ifdef CONFIG_MMU
 static int vmalloc_open(struct inode *inode, struct file *file)
 {
-	return seq_open(file, &vmalloc_op);
+	unsigned int *ptr = NULL;
+	int ret;
+
+	if (NUMA_BUILD)
+		ptr = kmalloc(nr_node_ids * sizeof(unsigned int), GFP_KERNEL);
+	ret = seq_open(file, &vmalloc_op);
+	if (!ret) {
+		struct seq_file *m = file->private_data;
+		m->private = ptr;
+	} else
+		kfree(ptr);
+	return ret;
 }
 
 static const struct file_operations proc_vmalloc_operations = {
 	.open		= vmalloc_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= seq_release_private,
 };
 #endif
 
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 5acc001d49f6..f9a8b892718f 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -10,149 +10,110 @@
 static struct dentry_operations proc_sys_dentry_operations;
 static const struct file_operations proc_sys_file_operations;
 static const struct inode_operations proc_sys_inode_operations;
+static const struct file_operations proc_sys_dir_file_operations;
+static const struct inode_operations proc_sys_dir_operations;
 
-static void proc_sys_refresh_inode(struct inode *inode, struct ctl_table *table)
-{
-	/* Refresh the cached information bits in the inode */
-	if (table) {
-		inode->i_uid = 0;
-		inode->i_gid = 0;
-		inode->i_mode = table->mode;
-		if (table->proc_handler) {
-			inode->i_mode |= S_IFREG;
-			inode->i_nlink = 1;
-		} else {
-			inode->i_mode |= S_IFDIR;
-			inode->i_nlink = 0;	/* It is too hard to figure out */
-		}
-	}
-}
-
-static struct inode *proc_sys_make_inode(struct inode *dir, struct ctl_table *table)
+static struct inode *proc_sys_make_inode(struct super_block *sb,
+		struct ctl_table_header *head, struct ctl_table *table)
 {
 	struct inode *inode;
-	struct proc_inode *dir_ei, *ei;
-	int depth;
+	struct proc_inode *ei;
 
-	inode = new_inode(dir->i_sb);
+	inode = new_inode(sb);
 	if (!inode)
 		goto out;
 
-	/* A directory is always one deeper than it's parent */
-	dir_ei = PROC_I(dir);
-	depth = dir_ei->fd + 1;
-
+	sysctl_head_get(head);
 	ei = PROC_I(inode);
-	ei->fd = depth;
+	ei->sysctl = head;
+	ei->sysctl_entry = table;
+
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
-	inode->i_op = &proc_sys_inode_operations;
-	inode->i_fop = &proc_sys_file_operations;
 	inode->i_flags |= S_PRIVATE; /* tell selinux to ignore this inode */
-	proc_sys_refresh_inode(inode, table);
+	inode->i_mode = table->mode;
+	if (!table->child) {
+		inode->i_mode |= S_IFREG;
+		inode->i_op = &proc_sys_inode_operations;
+		inode->i_fop = &proc_sys_file_operations;
+	} else {
+		inode->i_mode |= S_IFDIR;
+		inode->i_nlink = 0;
+		inode->i_op = &proc_sys_dir_operations;
+		inode->i_fop = &proc_sys_dir_file_operations;
+	}
 out:
 	return inode;
 }
 
-static struct dentry *proc_sys_ancestor(struct dentry *dentry, int depth)
-{
-	for (;;) {
-		struct proc_inode *ei;
-
-		ei = PROC_I(dentry->d_inode);
-		if (ei->fd == depth)
-			break; /* found */
-
-		dentry = dentry->d_parent;
-	}
-	return dentry;
-}
-
-static struct ctl_table *proc_sys_lookup_table_one(struct ctl_table *table,
-							struct qstr *name)
+static struct ctl_table *find_in_table(struct ctl_table *p, struct qstr *name)
 {
 	int len;
-	for ( ; table->ctl_name || table->procname; table++) {
+	for ( ; p->ctl_name || p->procname; p++) {
 
-		if (!table->procname)
+		if (!p->procname)
 			continue;
 
-		len = strlen(table->procname);
+		len = strlen(p->procname);
 		if (len != name->len)
 			continue;
 
-		if (memcmp(table->procname, name->name, len) != 0)
+		if (memcmp(p->procname, name->name, len) != 0)
 			continue;
 
 		/* I have a match */
-		return table;
+		return p;
 	}
 	return NULL;
 }
 
-static struct ctl_table *proc_sys_lookup_table(struct dentry *dentry,
-						struct ctl_table *table)
+struct ctl_table_header *grab_header(struct inode *inode)
 {
-	struct dentry *ancestor;
-	struct proc_inode *ei;
-	int depth, i;
+	if (PROC_I(inode)->sysctl)
+		return sysctl_head_grab(PROC_I(inode)->sysctl);
+	else
+		return sysctl_head_next(NULL);
+}
 
-	ei = PROC_I(dentry->d_inode);
-	depth = ei->fd;
+static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
+					struct nameidata *nd)
+{
+	struct ctl_table_header *head = grab_header(dir);
+	struct ctl_table *table = PROC_I(dir)->sysctl_entry;
+	struct ctl_table_header *h = NULL;
+	struct qstr *name = &dentry->d_name;
+	struct ctl_table *p;
+	struct inode *inode;
+	struct dentry *err = ERR_PTR(-ENOENT);
 
-	if (depth == 0)
-		return table;
+	if (IS_ERR(head))
+		return ERR_CAST(head);
 
-	for (i = 1; table && (i <= depth); i++) {
-		ancestor = proc_sys_ancestor(dentry, i);
-		table = proc_sys_lookup_table_one(table, &ancestor->d_name);
-		if (table)
-			table = table->child;
+	if (table && !table->child) {
+		WARN_ON(1);
+		goto out;
 	}
-	return table;
-
-}
-static struct ctl_table *proc_sys_lookup_entry(struct dentry *dparent,
-						struct qstr *name,
-						struct ctl_table *table)
-{
-	table = proc_sys_lookup_table(dparent, table);
-	if (table)
-		table = proc_sys_lookup_table_one(table, name);
-	return table;
-}
 
-static struct ctl_table *do_proc_sys_lookup(struct dentry *parent,
-						struct qstr *name,
-						struct ctl_table_header **ptr)
-{
-	struct ctl_table_header *head;
-	struct ctl_table *table = NULL;
+	table = table ? table->child : head->ctl_table;
 
-	for (head = sysctl_head_next(NULL); head;
-			head = sysctl_head_next(head)) {
-		table = proc_sys_lookup_entry(parent, name, head->ctl_table);
-		if (table)
-			break;
+	p = find_in_table(table, name);
+	if (!p) {
+		for (h = sysctl_head_next(NULL); h; h = sysctl_head_next(h)) {
+			if (h->attached_to != table)
+				continue;
+			p = find_in_table(h->attached_by, name);
+			if (p)
+				break;
+		}
 	}
-	*ptr = head;
-	return table;
-}
-
-static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
-					struct nameidata *nd)
-{
-	struct ctl_table_header *head;
-	struct inode *inode;
-	struct dentry *err;
-	struct ctl_table *table;
 
-	err = ERR_PTR(-ENOENT);
-	table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
-	if (!table)
+	if (!p)
 		goto out;
 
 	err = ERR_PTR(-ENOMEM);
-	inode = proc_sys_make_inode(dir, table);
+	inode = proc_sys_make_inode(dir->i_sb, h ? h : head, p);
+	if (h)
+		sysctl_head_finish(h);
+
 	if (!inode)
 		goto out;
 
@@ -168,22 +129,14 @@ out:
 static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
 		size_t count, loff_t *ppos, int write)
 {
-	struct dentry *dentry = filp->f_dentry;
-	struct ctl_table_header *head;
-	struct ctl_table *table;
+	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct ctl_table_header *head = grab_header(inode);
+	struct ctl_table *table = PROC_I(inode)->sysctl_entry;
 	ssize_t error;
 	size_t res;
 
-	table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
-	/* Has the sysctl entry disappeared on us? */
-	error = -ENOENT;
-	if (!table)
-		goto out;
-
-	/* Has the sysctl entry been replaced by a directory? */
-	error = -EISDIR;
-	if (!table->proc_handler)
-		goto out;
+	if (IS_ERR(head))
+		return PTR_ERR(head);
 
 	/*
 	 * At this point we know that the sysctl was not unregistered
@@ -193,6 +146,11 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
 	if (sysctl_perm(head->root, table, write ? MAY_WRITE : MAY_READ))
 		goto out;
 
+	/* if that can happen at all, it should be -EINVAL, not -EISDIR */
+	error = -EINVAL;
+	if (!table->proc_handler)
+		goto out;
+
 	/* careful: calling conventions are nasty here */
 	res = count;
 	error = table->proc_handler(table, write, filp, buf, &res, ppos);
@@ -218,82 +176,86 @@ static ssize_t proc_sys_write(struct file *filp, const char __user *buf,
 
 
 static int proc_sys_fill_cache(struct file *filp, void *dirent,
-				filldir_t filldir, struct ctl_table *table)
+				filldir_t filldir,
+				struct ctl_table_header *head,
+				struct ctl_table *table)
 {
-	struct ctl_table_header *head;
-	struct ctl_table *child_table = NULL;
 	struct dentry *child, *dir = filp->f_path.dentry;
 	struct inode *inode;
 	struct qstr qname;
 	ino_t ino = 0;
 	unsigned type = DT_UNKNOWN;
-	int ret;
 
 	qname.name = table->procname;
 	qname.len  = strlen(table->procname);
 	qname.hash = full_name_hash(qname.name, qname.len);
 
-	/* Suppress duplicates.
-	 * Only fill a directory entry if it is the value that
-	 * an ordinary lookup of that name returns.  Hide all
-	 * others.
-	 *
-	 * If we ever cache this translation in the dcache
-	 * I should do a dcache lookup first.  But for now
-	 * it is just simpler not to.
-	 */
-	ret = 0;
-	child_table = do_proc_sys_lookup(dir, &qname, &head);
-	sysctl_head_finish(head);
-	if (child_table != table)
-		return 0;
-
 	child = d_lookup(dir, &qname);
 	if (!child) {
-		struct dentry *new;
-		new = d_alloc(dir, &qname);
-		if (new) {
-			inode = proc_sys_make_inode(dir->d_inode, table);
-			if (!inode)
-				child = ERR_PTR(-ENOMEM);
-			else {
-				new->d_op = &proc_sys_dentry_operations;
-				d_add(new, inode);
+		child = d_alloc(dir, &qname);
+		if (child) {
+			inode = proc_sys_make_inode(dir->d_sb, head, table);
+			if (!inode) {
+				dput(child);
+				return -ENOMEM;
+			} else {
+				child->d_op = &proc_sys_dentry_operations;
+				d_add(child, inode);
 			}
-			if (child)
-				dput(new);
-			else
-				child = new;
+		} else {
+			return -ENOMEM;
 		}
 	}
-	if (!child || IS_ERR(child) || !child->d_inode)
-		goto end_instantiate;
 	inode = child->d_inode;
-	if (inode) {
-		ino  = inode->i_ino;
-		type = inode->i_mode >> 12;
-	}
+	ino  = inode->i_ino;
+	type = inode->i_mode >> 12;
 	dput(child);
-end_instantiate:
-	if (!ino)
-		ino= find_inode_number(dir, &qname);
-	if (!ino)
-		ino = 1;
-	return filldir(dirent, qname.name, qname.len, filp->f_pos, ino, type);
+	return !!filldir(dirent, qname.name, qname.len, filp->f_pos, ino, type);
+}
+
+static int scan(struct ctl_table_header *head, ctl_table *table,
+		unsigned long *pos, struct file *file,
+		void *dirent, filldir_t filldir)
+{
+
+	for (; table->ctl_name || table->procname; table++, (*pos)++) {
+		int res;
+
+		/* Can't do anything without a proc name */
+		if (!table->procname)
+			continue;
+
+		if (*pos < file->f_pos)
+			continue;
+
+		res = proc_sys_fill_cache(file, dirent, filldir, head, table);
+		if (res)
+			return res;
+
+		file->f_pos = *pos + 1;
+	}
+	return 0;
 }
 
 static int proc_sys_readdir(struct file *filp, void *dirent, filldir_t filldir)
 {
-	struct dentry *dentry = filp->f_dentry;
+	struct dentry *dentry = filp->f_path.dentry;
 	struct inode *inode = dentry->d_inode;
-	struct ctl_table_header *head = NULL;
-	struct ctl_table *table;
+	struct ctl_table_header *head = grab_header(inode);
+	struct ctl_table *table = PROC_I(inode)->sysctl_entry;
+	struct ctl_table_header *h = NULL;
 	unsigned long pos;
-	int ret;
+	int ret = -EINVAL;
+
+	if (IS_ERR(head))
+		return PTR_ERR(head);
 
-	ret = -ENOTDIR;
-	if (!S_ISDIR(inode->i_mode))
+	if (table && !table->child) {
+		WARN_ON(1);
 		goto out;
+	}
+
+	table = table ? table->child : head->ctl_table;
 
 	ret = 0;
 	/* Avoid a switch here: arm builds fail with missing __cmpdi2 */
@@ -311,30 +273,17 @@ static int proc_sys_readdir(struct file *filp, void *dirent, filldir_t filldir)
 	}
 	pos = 2;
 
-	/* - Find each instance of the directory
-	 * - Read all entries in each instance
-	 * - Before returning an entry to user space lookup the entry
-	 *   by name and if I find a different entry don't return
-	 *   this one because it means it is a buried dup.
-	 * For sysctl this should only happen for directory entries.
-	 */
-	for (head = sysctl_head_next(NULL); head; head = sysctl_head_next(head)) {
-		table = proc_sys_lookup_table(dentry, head->ctl_table);
+	ret = scan(head, table, &pos, filp, dirent, filldir);
+	if (ret)
+		goto out;
 
-		if (!table)
+	for (h = sysctl_head_next(NULL); h; h = sysctl_head_next(h)) {
+		if (h->attached_to != table)
 			continue;
-
-		for (; table->ctl_name || table->procname; table++, pos++) {
-			/* Can't do anything without a proc name */
-			if (!table->procname)
-				continue;
-
-			if (pos < filp->f_pos)
-				continue;
-
-			if (proc_sys_fill_cache(filp, dirent, filldir, table) < 0)
-				goto out;
-			filp->f_pos = pos + 1;
+		ret = scan(h, h->attached_by, &pos, filp, dirent, filldir);
+		if (ret) {
+			sysctl_head_finish(h);
+			break;
 		}
 	}
 	ret = 1;
@@ -343,53 +292,24 @@ out:
 	return ret;
 }
 
-static int proc_sys_permission(struct inode *inode, int mask, struct nameidata *nd)
+static int proc_sys_permission(struct inode *inode, int mask)
 {
 	/*
 	 * sysctl entries that are not writeable,
 	 * are _NOT_ writeable, capabilities or not.
 	 */
-	struct ctl_table_header *head;
-	struct ctl_table *table;
-	struct dentry *dentry;
-	int mode;
-	int depth;
+	struct ctl_table_header *head = grab_header(inode);
+	struct ctl_table *table = PROC_I(inode)->sysctl_entry;
 	int error;
 
-	head = NULL;
-	depth = PROC_I(inode)->fd;
-
-	/* First check the cached permissions, in case we don't have
-	 * enough information to lookup the sysctl table entry.
-	 */
-	error = -EACCES;
-	mode = inode->i_mode;
-
-	if (current->euid == 0)
-		mode >>= 6;
-	else if (in_group_p(0))
-		mode >>= 3;
-
-	if ((mode & mask & (MAY_READ|MAY_WRITE|MAY_EXEC)) == mask)
-		error = 0;
-
-	/* If we can't get a sysctl table entry the permission
-	 * checks on the cached mode will have to be enough.
-	 */
-	if (!nd || !depth)
-		goto out;
+	if (IS_ERR(head))
+		return PTR_ERR(head);
 
-	dentry = nd->path.dentry;
-	table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
+	if (!table) /* global root - r-xr-xr-x */
+		error = mask & MAY_WRITE ? -EACCES : 0;
+	else /* Use the permissions on the sysctl table entry */
+		error = sysctl_perm(head->root, table, mask);
 
-	/* If the entry does not exist deny permission */
-	error = -EACCES;
-	if (!table)
-		goto out;
-
-	/* Use the permissions on the sysctl table entry */
-	error = sysctl_perm(head->root, table, mask);
-out:
 	sysctl_head_finish(head);
 	return error;
 }
@@ -409,33 +329,70 @@ static int proc_sys_setattr(struct dentry *dentry, struct iattr *attr)
 	return error;
 }
 
-/* I'm lazy and don't distinguish between files and directories,
- * until access time.
- */
+static int proc_sys_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+{
+	struct inode *inode = dentry->d_inode;
+	struct ctl_table_header *head = grab_header(inode);
+	struct ctl_table *table = PROC_I(inode)->sysctl_entry;
+
+	if (IS_ERR(head))
+		return PTR_ERR(head);
+
+	generic_fillattr(inode, stat);
+	if (table)
+		stat->mode = (stat->mode & S_IFMT) | table->mode;
+
+	sysctl_head_finish(head);
+	return 0;
+}
+
 static const struct file_operations proc_sys_file_operations = {
 	.read		= proc_sys_read,
 	.write		= proc_sys_write,
+};
+
+static const struct file_operations proc_sys_dir_file_operations = {
 	.readdir	= proc_sys_readdir,
 };
 
 static const struct inode_operations proc_sys_inode_operations = {
+	.permission	= proc_sys_permission,
+	.setattr	= proc_sys_setattr,
+	.getattr	= proc_sys_getattr,
+};
+
+static const struct inode_operations proc_sys_dir_operations = {
 	.lookup		= proc_sys_lookup,
 	.permission	= proc_sys_permission,
 	.setattr	= proc_sys_setattr,
+	.getattr	= proc_sys_getattr,
 };
 
 static int proc_sys_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
-	struct ctl_table_header *head;
-	struct ctl_table *table;
-	table = do_proc_sys_lookup(dentry->d_parent, &dentry->d_name, &head);
-	proc_sys_refresh_inode(dentry->d_inode, table);
-	sysctl_head_finish(head);
-	return !!table;
+	return !PROC_I(dentry->d_inode)->sysctl->unregistering;
+}
+
+static int proc_sys_delete(struct dentry *dentry)
+{
+	return !!PROC_I(dentry->d_inode)->sysctl->unregistering;
+}
+
+static int proc_sys_compare(struct dentry *dir, struct qstr *qstr,
+			    struct qstr *name)
+{
+	struct dentry *dentry = container_of(qstr, struct dentry, d_name);
+	if (qstr->len != name->len)
+		return 1;
+	if (memcmp(qstr->name, name->name, name->len))
+		return 1;
+	return !sysctl_is_seen(PROC_I(dentry->d_inode)->sysctl);
 }
 
 static struct dentry_operations proc_sys_dentry_operations = {
 	.d_revalidate	= proc_sys_revalidate,
+	.d_delete	= proc_sys_delete,
+	.d_compare	= proc_sys_compare,
 };
 
 static struct proc_dir_entry *proc_sys_root;
@@ -443,8 +400,8 @@ static struct proc_dir_entry *proc_sys_root;
 int proc_sys_init(void)
 {
 	proc_sys_root = proc_mkdir("sys", NULL);
-	proc_sys_root->proc_iops = &proc_sys_inode_operations;
-	proc_sys_root->proc_fops = &proc_sys_file_operations;
+	proc_sys_root->proc_iops = &proc_sys_dir_operations;
+	proc_sys_root->proc_fops = &proc_sys_dir_file_operations;
 	proc_sys_root->nlink = 0;
 	return 0;
 }
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index b31ab78052b3..2aad1044b84c 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -553,7 +553,7 @@ static void qnx4_destroy_inode(struct inode *inode)
 	kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo;
 
diff --git a/fs/quota.c b/fs/quota.c
index db1cc9f3c7aa..7f4386ebc23a 100644
--- a/fs/quota.c
+++ b/fs/quota.c
@@ -186,7 +186,7 @@ static void quota_sync_sb(struct super_block *sb, int type)
 
 void sync_dquots(struct super_block *sb, int type)
 {
-	int cnt, dirty;
+	int cnt;
 
 	if (sb) {
 		if (sb->s_qcop->quota_sync)
@@ -198,11 +198,17 @@ void sync_dquots(struct super_block *sb, int type)
 restart:
 	list_for_each_entry(sb, &super_blocks, s_list) {
 		/* This test just improves performance so it needn't be reliable... */
-		for (cnt = 0, dirty = 0; cnt < MAXQUOTAS; cnt++)
-			if ((type == cnt || type == -1) && sb_has_quota_enabled(sb, cnt)
-			    && info_any_dirty(&sb_dqopt(sb)->info[cnt]))
-				dirty = 1;
-		if (!dirty)
+		for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+			if (type != -1 && type != cnt)
+				continue;
+			if (!sb_has_quota_enabled(sb, cnt))
+				continue;
+			if (!info_dirty(&sb_dqopt(sb)->info[cnt]) &&
+			    list_empty(&sb_dqopt(sb)->info[cnt].dqi_dirty_list))
+				continue;
+			break;
+		}
+		if (cnt == MAXQUOTAS)
 			continue;
 		sb->s_count++;
 		spin_unlock(&sb_lock);
diff --git a/fs/quota_v1.c b/fs/quota_v1.c
index a6cf9269105c..5ae15b13eeb0 100644
--- a/fs/quota_v1.c
+++ b/fs/quota_v1.c
@@ -1,6 +1,7 @@
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/quota.h>
+#include <linux/quotaops.h>
 #include <linux/dqblk_v1.h>
 #include <linux/quotaio_v1.h>
 #include <linux/kernel.h>
diff --git a/fs/quota_v2.c b/fs/quota_v2.c
index 234ada903633..b53827dc02d9 100644
--- a/fs/quota_v2.c
+++ b/fs/quota_v2.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/quotaops.h>
 
 #include <asm/byteorder.h>
 
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index e396b2fa4743..c8f60ee183b5 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -34,15 +34,10 @@
 **		        from within kupdate, it will ignore the immediate flag
 */
 
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
 #include <linux/time.h>
 #include <linux/semaphore.h>
-
 #include <linux/vmalloc.h>
 #include <linux/reiserfs_fs.h>
-
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/fcntl.h>
@@ -54,6 +49,9 @@
 #include <linux/writeback.h>
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
+#include <linux/uaccess.h>
+
+#include <asm/system.h>
 
 /* gets a struct reiserfs_journal_list * from a list head */
 #define JOURNAL_LIST_ENTRY(h) (list_entry((h), struct reiserfs_journal_list, \
@@ -558,13 +556,13 @@ static inline void insert_journal_hash(struct reiserfs_journal_cnode **table,
 static inline void lock_journal(struct super_block *p_s_sb)
 {
 	PROC_INFO_INC(p_s_sb, journal.lock_journal);
-	down(&SB_JOURNAL(p_s_sb)->j_lock);
+	mutex_lock(&SB_JOURNAL(p_s_sb)->j_mutex);
 }
 
 /* unlock the current transaction */
 static inline void unlock_journal(struct super_block *p_s_sb)
 {
-	up(&SB_JOURNAL(p_s_sb)->j_lock);
+	mutex_unlock(&SB_JOURNAL(p_s_sb)->j_mutex);
 }
 
 static inline void get_journal_list(struct reiserfs_journal_list *jl)
@@ -1045,9 +1043,9 @@ static int flush_commit_list(struct super_block *s,
 	}
 
 	/* make sure nobody is trying to flush this one at the same time */
-	down(&jl->j_commit_lock);
+	mutex_lock(&jl->j_commit_mutex);
 	if (!journal_list_still_alive(s, trans_id)) {
-		up(&jl->j_commit_lock);
+		mutex_unlock(&jl->j_commit_mutex);
 		goto put_jl;
 	}
 	BUG_ON(jl->j_trans_id == 0);
@@ -1057,7 +1055,7 @@ static int flush_commit_list(struct super_block *s,
 		if (flushall) {
 			atomic_set(&(jl->j_older_commits_done), 1);
 		}
-		up(&jl->j_commit_lock);
+		mutex_unlock(&jl->j_commit_mutex);
 		goto put_jl;
 	}
 
@@ -1181,7 +1179,7 @@ static int flush_commit_list(struct super_block *s,
 	if (flushall) {
 		atomic_set(&(jl->j_older_commits_done), 1);
 	}
-	up(&jl->j_commit_lock);
+	mutex_unlock(&jl->j_commit_mutex);
       put_jl:
 	put_journal_list(s, jl);
 
@@ -1411,8 +1409,8 @@ static int flush_journal_list(struct super_block *s,
 
 	/* if flushall == 0, the lock is already held */
 	if (flushall) {
-		down(&journal->j_flush_sem);
-	} else if (!down_trylock(&journal->j_flush_sem)) {
+		mutex_lock(&journal->j_flush_mutex);
+	} else if (mutex_trylock(&journal->j_flush_mutex)) {
 		BUG();
 	}
 
@@ -1642,7 +1640,7 @@ static int flush_journal_list(struct super_block *s,
 	jl->j_state = 0;
 	put_journal_list(s, jl);
 	if (flushall)
-		up(&journal->j_flush_sem);
+		mutex_unlock(&journal->j_flush_mutex);
 	put_fs_excl();
 	return err;
 }
@@ -1772,12 +1770,12 @@ static int kupdate_transactions(struct super_block *s,
 	struct reiserfs_journal *journal = SB_JOURNAL(s);
 	chunk.nr = 0;
 
-	down(&journal->j_flush_sem);
+	mutex_lock(&journal->j_flush_mutex);
 	if (!journal_list_still_alive(s, orig_trans_id)) {
 		goto done;
 	}
 
-	/* we've got j_flush_sem held, nobody is going to delete any
+	/* we've got j_flush_mutex held, nobody is going to delete any
 	 * of these lists out from underneath us
 	 */
 	while ((num_trans && transactions_flushed < num_trans) ||
@@ -1812,7 +1810,7 @@ static int kupdate_transactions(struct super_block *s,
 	}
 
       done:
-	up(&journal->j_flush_sem);
+	mutex_unlock(&journal->j_flush_mutex);
 	return ret;
 }
 
@@ -2556,7 +2554,7 @@ static struct reiserfs_journal_list *alloc_journal_list(struct super_block *s)
 	INIT_LIST_HEAD(&jl->j_working_list);
 	INIT_LIST_HEAD(&jl->j_tail_bh_list);
 	INIT_LIST_HEAD(&jl->j_bh_list);
-	sema_init(&jl->j_commit_lock, 1);
+	mutex_init(&jl->j_commit_mutex);
 	SB_JOURNAL(s)->j_num_lists++;
 	get_journal_list(jl);
 	return jl;
@@ -2837,8 +2835,8 @@ int journal_init(struct super_block *p_s_sb, const char *j_dev_name,
 	journal->j_last = NULL;
 	journal->j_first = NULL;
 	init_waitqueue_head(&(journal->j_join_wait));
-	sema_init(&journal->j_lock, 1);
-	sema_init(&journal->j_flush_sem, 1);
+	mutex_init(&journal->j_mutex);
+	mutex_init(&journal->j_flush_mutex);
 
 	journal->j_trans_id = 10;
 	journal->j_mount_id = 10;
@@ -4030,7 +4028,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th,
 	 * the new transaction is fully setup, and we've already flushed the
 	 * ordered bh list
 	 */
-	down(&jl->j_commit_lock);
+	mutex_lock(&jl->j_commit_mutex);
 
 	/* save the transaction id in case we need to commit it later */
 	commit_trans_id = jl->j_trans_id;
@@ -4196,7 +4194,7 @@ static int do_journal_end(struct reiserfs_transaction_handle *th,
 		lock_kernel();
 	}
 	BUG_ON(!list_empty(&jl->j_tail_bh_list));
-	up(&jl->j_commit_lock);
+	mutex_unlock(&jl->j_commit_mutex);
 
 	/* honor the flush wishes from the caller, simple commits can
 	 ** be done outside the journal lock, they are done below
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 1d40f2bd1970..879e54d35c2d 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -22,6 +22,7 @@
 #include <linux/blkdev.h>
 #include <linux/buffer_head.h>
 #include <linux/exportfs.h>
+#include <linux/quotaops.h>
 #include <linux/vfs.h>
 #include <linux/mnt_namespace.h>
 #include <linux/mount.h>
@@ -182,7 +183,7 @@ static int finish_unfinished(struct super_block *s)
 			int ret = reiserfs_quota_on_mount(s, i);
 			if (ret < 0)
 				reiserfs_warning(s,
-						 "reiserfs: cannot turn on journalled quota: error %d",
+						 "reiserfs: cannot turn on journaled quota: error %d",
 						 ret);
 		}
 	}
@@ -520,7 +521,7 @@ static void reiserfs_destroy_inode(struct inode *inode)
 	kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
 
@@ -876,7 +877,9 @@ static int reiserfs_parse_options(struct super_block *s, char *options,	/* strin
 				     mount options were selected. */
 				  unsigned long *blocks,	/* strtol-ed from NNN of resize=NNN */
 				  char **jdev_name,
-				  unsigned int *commit_max_age)
+				  unsigned int *commit_max_age,
+				  char **qf_names,
+				  unsigned int *qfmt)
 {
 	int c;
 	char *arg = NULL;
@@ -992,9 +995,11 @@ static int reiserfs_parse_options(struct super_block *s, char *options,	/* strin
 		if (c == 'u' || c == 'g') {
 			int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
 
-			if (sb_any_quota_enabled(s)) {
+			if ((sb_any_quota_enabled(s) ||
+			     sb_any_quota_suspended(s)) &&
+			    (!*arg != !REISERFS_SB(s)->s_qf_names[qtype])) {
 				reiserfs_warning(s,
-						 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
+						 "reiserfs_parse_options: cannot change journaled quota options when quota turned on.");
 				return 0;
 			}
 			if (*arg) {	/* Some filename specified? */
@@ -1011,46 +1016,54 @@ static int reiserfs_parse_options(struct super_block *s, char *options,	/* strin
 							 "reiserfs_parse_options: quotafile must be on filesystem root.");
 					return 0;
 				}
-				REISERFS_SB(s)->s_qf_names[qtype] =
+				qf_names[qtype] =
 				    kmalloc(strlen(arg) + 1, GFP_KERNEL);
-				if (!REISERFS_SB(s)->s_qf_names[qtype]) {
+				if (!qf_names[qtype]) {
 					reiserfs_warning(s,
 							 "reiserfs_parse_options: not enough memory for storing quotafile name.");
 					return 0;
 				}
-				strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
+				strcpy(qf_names[qtype], arg);
 				*mount_options |= 1 << REISERFS_QUOTA;
 			} else {
-				kfree(REISERFS_SB(s)->s_qf_names[qtype]);
-				REISERFS_SB(s)->s_qf_names[qtype] = NULL;
+				if (qf_names[qtype] !=
+				    REISERFS_SB(s)->s_qf_names[qtype])
+					kfree(qf_names[qtype]);
+				qf_names[qtype] = NULL;
 			}
 		}
 		if (c == 'f') {
 			if (!strcmp(arg, "vfsold"))
-				REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
+				*qfmt = QFMT_VFS_OLD;
 			else if (!strcmp(arg, "vfsv0"))
-				REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
+				*qfmt = QFMT_VFS_V0;
 			else {
 				reiserfs_warning(s,
 						 "reiserfs_parse_options: unknown quota format specified.");
 				return 0;
 			}
+			if ((sb_any_quota_enabled(s) ||
+			     sb_any_quota_suspended(s)) &&
+			    *qfmt != REISERFS_SB(s)->s_jquota_fmt) {
+				reiserfs_warning(s,
+						 "reiserfs_parse_options: cannot change journaled quota options when quota turned on.");
+				return 0;
+			}
 		}
 #else
 		if (c == 'u' || c == 'g' || c == 'f') {
 			reiserfs_warning(s,
-					 "reiserfs_parse_options: journalled quota options not supported.");
+					 "reiserfs_parse_options: journaled quota options not supported.");
 			return 0;
 		}
 #endif
 	}
 
 #ifdef CONFIG_QUOTA
-	if (!REISERFS_SB(s)->s_jquota_fmt
-	    && (REISERFS_SB(s)->s_qf_names[USRQUOTA]
-		|| REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
+	if (!REISERFS_SB(s)->s_jquota_fmt && !*qfmt
+	    && (qf_names[USRQUOTA] || qf_names[GRPQUOTA])) {
 		reiserfs_warning(s,
-				 "reiserfs_parse_options: journalled quota format not specified.");
+				 "reiserfs_parse_options: journaled quota format not specified.");
 		return 0;
 	}
 	/* This checking is not precise wrt the quota type but for our purposes it is sufficient */
@@ -1130,6 +1143,21 @@ static void handle_attrs(struct super_block *s)
 	}
 }
 
+#ifdef CONFIG_QUOTA
+static void handle_quota_files(struct super_block *s, char **qf_names,
+			       unsigned int *qfmt)
+{
+	int i;
+
+	for (i = 0; i < MAXQUOTAS; i++) {
+		if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
+			kfree(REISERFS_SB(s)->s_qf_names[i]);
+		REISERFS_SB(s)->s_qf_names[i] = qf_names[i];
+	}
+	REISERFS_SB(s)->s_jquota_fmt = *qfmt;
+}
+#endif
+
 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
 {
 	struct reiserfs_super_block *rs;
@@ -1141,23 +1169,30 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
 	struct reiserfs_journal *journal = SB_JOURNAL(s);
 	char *new_opts = kstrdup(arg, GFP_KERNEL);
 	int err;
+	char *qf_names[MAXQUOTAS];
+	unsigned int qfmt = 0;
 #ifdef CONFIG_QUOTA
 	int i;
+
+	memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
 #endif
 
 	rs = SB_DISK_SUPER_BLOCK(s);
 
 	if (!reiserfs_parse_options
-	    (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
+	    (s, arg, &mount_options, &blocks, NULL, &commit_max_age,
+	    qf_names, &qfmt)) {
 #ifdef CONFIG_QUOTA
-		for (i = 0; i < MAXQUOTAS; i++) {
-			kfree(REISERFS_SB(s)->s_qf_names[i]);
-			REISERFS_SB(s)->s_qf_names[i] = NULL;
-		}
+		for (i = 0; i < MAXQUOTAS; i++)
+			if (qf_names[i] != REISERFS_SB(s)->s_qf_names[i])
+				kfree(qf_names[i]);
 #endif
 		err = -EINVAL;
 		goto out_err;
 	}
+#ifdef CONFIG_QUOTA
+	handle_quota_files(s, qf_names, &qfmt);
+#endif
 
 	handle_attrs(s);
 
@@ -1570,6 +1605,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
 	char *jdev_name;
 	struct reiserfs_sb_info *sbi;
 	int errval = -EINVAL;
+	char *qf_names[MAXQUOTAS] = {};
+	unsigned int qfmt = 0;
 
 	save_mount_options(s, data);
 
@@ -1597,9 +1634,12 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
 	jdev_name = NULL;
 	if (reiserfs_parse_options
 	    (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
-	     &commit_max_age) == 0) {
+	     &commit_max_age, qf_names, &qfmt) == 0) {
 		goto error;
 	}
+#ifdef CONFIG_QUOTA
+	handle_quota_files(s, qf_names, &qfmt);
+#endif
 
 	if (blocks) {
 		SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
@@ -1819,7 +1859,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
 
 	return (0);
 
-      error:
+error:
 	if (jinit_done) {	/* kill the commit thread, free journal ram */
 		journal_release_error(NULL, s);
 	}
@@ -1830,10 +1870,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
 #ifdef CONFIG_QUOTA
 	{
 		int j;
-		for (j = 0; j < MAXQUOTAS; j++) {
-			kfree(sbi->s_qf_names[j]);
-			sbi->s_qf_names[j] = NULL;
-		}
+		for (j = 0; j < MAXQUOTAS; j++)
+			kfree(qf_names[j]);
 	}
 #endif
 	kfree(sbi);
@@ -1980,7 +2018,7 @@ static int reiserfs_release_dquot(struct dquot *dquot)
 
 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
 {
-	/* Are we journalling quotas? */
+	/* Are we journaling quotas? */
 	if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
 	    REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
 		dquot_mark_dquot_dirty(dquot);
@@ -2026,6 +2064,7 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
 	int err;
 	struct nameidata nd;
 	struct inode *inode;
+	struct reiserfs_transaction_handle th;
 
 	if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
 		return -EINVAL;
@@ -2053,17 +2092,28 @@ static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
 		}
 		mark_inode_dirty(inode);
 	}
-	/* Not journalling quota? No more tests needed... */
-	if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
-	    !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
-		path_put(&nd.path);
-		return vfs_quota_on(sb, type, format_id, path, 0);
-	}
-	/* Quotafile not of fs root? */
-	if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
-		reiserfs_warning(sb,
+	/* Journaling quota? */
+	if (REISERFS_SB(sb)->s_qf_names[type]) {
+		/* Quotafile not of fs root? */
+		if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode)
+			reiserfs_warning(sb,
 				 "reiserfs: Quota file not on filesystem root. "
 				 "Journalled quota will not work.");
+	}
+
+	/*
+	 * When we journal data on quota file, we have to flush journal to see
+	 * all updates to the file when we bypass pagecache...
+	 */
+	if (reiserfs_file_data_log(inode)) {
+		/* Just start temporary transaction and finish it */
+		err = journal_begin(&th, sb, 1);
+		if (err)
+			return err;
+		err = journal_end_sync(&th, sb, 1);
+		if (err)
+			return err;
+	}
 	path_put(&nd.path);
 	return vfs_quota_on(sb, type, format_id, path, 0);
 }
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index d7c4935c1034..bb3cb5b7cdb2 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -1250,7 +1250,7 @@ static int reiserfs_check_acl(struct inode *inode, int mask)
 	return error;
 }
 
-int reiserfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+int reiserfs_permission(struct inode *inode, int mask)
 {
 	/*
 	 * We don't do permission checks on the internal objects.
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 5e90a95ad60b..056008db1377 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -6,8 +6,6 @@
 #include <linux/reiserfs_xattr.h>
 #include <asm/uaccess.h>
 
-#define XATTR_SECURITY_PREFIX "security."
-
 static int
 security_get(struct inode *inode, const char *name, void *buffer, size_t size)
 {
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
index 024a938ca60f..60abe2bb1f98 100644
--- a/fs/reiserfs/xattr_trusted.c
+++ b/fs/reiserfs/xattr_trusted.c
@@ -7,8 +7,6 @@
 #include <linux/reiserfs_xattr.h>
 #include <asm/uaccess.h>
 
-#define XATTR_TRUSTED_PREFIX "trusted."
-
 static int
 trusted_get(struct inode *inode, const char *name, void *buffer, size_t size)
 {
diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c
index 073f39364b11..1384efcb938e 100644
--- a/fs/reiserfs/xattr_user.c
+++ b/fs/reiserfs/xattr_user.c
@@ -10,8 +10,6 @@
 # include <linux/reiserfs_acl.h>
 #endif
 
-#define XATTR_USER_PREFIX "user."
-
 static int
 user_get(struct inode *inode, const char *name, void *buffer, size_t size)
 {
diff --git a/fs/romfs/inode.c b/fs/romfs/inode.c
index 3f13d491c7c7..8e51a2aaa977 100644
--- a/fs/romfs/inode.c
+++ b/fs/romfs/inode.c
@@ -577,7 +577,7 @@ static void romfs_destroy_inode(struct inode *inode)
 	kmem_cache_free(romfs_inode_cachep, ROMFS_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct romfs_inode_info *ei = foo;
 
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 619725644c75..9c39bc7f8431 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -205,11 +205,19 @@ static const struct file_operations signalfd_fops = {
 	.read		= signalfd_read,
 };
 
-asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemask)
+asmlinkage long sys_signalfd4(int ufd, sigset_t __user *user_mask,
+			      size_t sizemask, int flags)
 {
 	sigset_t sigmask;
 	struct signalfd_ctx *ctx;
 
+	/* Check the SFD_* constants for consistency.  */
+	BUILD_BUG_ON(SFD_CLOEXEC != O_CLOEXEC);
+	BUILD_BUG_ON(SFD_NONBLOCK != O_NONBLOCK);
+
+	if (flags & ~(SFD_CLOEXEC | SFD_NONBLOCK))
+		return -EINVAL;
+
 	if (sizemask != sizeof(sigset_t) ||
 	    copy_from_user(&sigmask, user_mask, sizeof(sigmask)))
 		return -EINVAL;
@@ -227,7 +235,8 @@ asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemas
 		 * When we call this, the initialization must be complete, since
 		 * anon_inode_getfd() will install the fd.
 		 */
-		ufd = anon_inode_getfd("[signalfd]", &signalfd_fops, ctx);
+		ufd = anon_inode_getfd("[signalfd]", &signalfd_fops, ctx,
+				       flags & (O_CLOEXEC | O_NONBLOCK));
 		if (ufd < 0)
 			kfree(ctx);
 	} else {
@@ -249,3 +258,9 @@ asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemas
 
 	return ufd;
 }
+
+asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask,
+			     size_t sizemask)
+{
+	return sys_signalfd4(ufd, user_mask, sizemask, 0);
+}
diff --git a/fs/smbfs/cache.c b/fs/smbfs/cache.c
index 8182f0542a21..8c177eb7e344 100644
--- a/fs/smbfs/cache.c
+++ b/fs/smbfs/cache.c
@@ -13,7 +13,6 @@
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
-#include <linux/dirent.h>
 #include <linux/smb_fs.h>
 #include <linux/pagemap.h>
 #include <linux/net.h>
diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c
index 2294783320cb..e4f8d51a5553 100644
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -408,7 +408,7 @@ smb_file_release(struct inode *inode, struct file * file)
  * privileges, so we need our own check for this.
  */
 static int
-smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
+smb_file_permission(struct inode *inode, int mask)
 {
 	int mode = inode->i_mode;
 	int error = 0;
@@ -417,7 +417,7 @@ smb_file_permission(struct inode *inode, int mask, struct nameidata *nd)
 
 	/* Look at user permissions */
 	mode >>= 6;
-	if ((mode & 7 & mask) != mask)
+	if (mask & ~mode & (MAY_READ | MAY_WRITE | MAY_EXEC))
 		error = -EACCES;
 	return error;
 }
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 376ef3ee6ed7..3528f40ffb0f 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -67,7 +67,7 @@ static void smb_destroy_inode(struct inode *inode)
 	kmem_cache_free(smb_inode_cachep, SMB_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct smb_inode_info *ei = (struct smb_inode_info *) foo;
 
diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c
index d517a27b7f4b..ee536e8a649a 100644
--- a/fs/smbfs/proc.c
+++ b/fs/smbfs/proc.c
@@ -16,7 +16,6 @@
 #include <linux/stat.h>
 #include <linux/fcntl.h>
 #include <linux/dcache.h>
-#include <linux/dirent.h>
 #include <linux/nls.h>
 #include <linux/smp_lock.h>
 #include <linux/net.h>
diff --git a/fs/splice.c b/fs/splice.c
index 399442179d89..b30311ba8af6 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -772,7 +772,7 @@ generic_file_splice_write_nolock(struct pipe_inode_info *pipe, struct file *out,
 	ssize_t ret;
 	int err;
 
-	err = remove_suid(out->f_path.dentry);
+	err = file_remove_suid(out);
 	if (unlikely(err))
 		return err;
 
@@ -830,7 +830,7 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
 	ssize_t ret;
 
 	inode_double_lock(inode, pipe->inode);
-	ret = remove_suid(out->f_path.dentry);
+	ret = file_remove_suid(out);
 	if (likely(!ret))
 		ret = __splice_from_pipe(pipe, &sd, pipe_to_file);
 	inode_double_unlock(inode, pipe->inode);
@@ -1161,36 +1161,6 @@ static long do_splice(struct file *in, loff_t __user *off_in,
 }
 
 /*
- * Do a copy-from-user while holding the mmap_semaphore for reading, in a
- * manner safe from deadlocking with simultaneous mmap() (grabbing mmap_sem
- * for writing) and page faulting on the user memory pointed to by src.
- * This assumes that we will very rarely hit the partial != 0 path, or this
- * will not be a win.
- */
-static int copy_from_user_mmap_sem(void *dst, const void __user *src, size_t n)
-{
-	int partial;
-
-	if (!access_ok(VERIFY_READ, src, n))
-		return -EFAULT;
-
-	pagefault_disable();
-	partial = __copy_from_user_inatomic(dst, src, n);
-	pagefault_enable();
-
-	/*
-	 * Didn't copy everything, drop the mmap_sem and do a faulting copy
-	 */
-	if (unlikely(partial)) {
-		up_read(&current->mm->mmap_sem);
-		partial = copy_from_user(dst, src, n);
-		down_read(&current->mm->mmap_sem);
-	}
-
-	return partial;
-}
-
-/*
  * Map an iov into an array of pages and offset/length tupples. With the
  * partial_page structure, we can map several non-contiguous ranges into
  * our ones pages[] map instead of splitting that operation into pieces.
@@ -1203,8 +1173,6 @@ static int get_iovec_page_array(const struct iovec __user *iov,
 {
 	int buffers = 0, error = 0;
 
-	down_read(&current->mm->mmap_sem);
-
 	while (nr_vecs) {
 		unsigned long off, npages;
 		struct iovec entry;
@@ -1213,7 +1181,7 @@ static int get_iovec_page_array(const struct iovec __user *iov,
 		int i;
 
 		error = -EFAULT;
-		if (copy_from_user_mmap_sem(&entry, iov, sizeof(entry)))
+		if (copy_from_user(&entry, iov, sizeof(entry)))
 			break;
 
 		base = entry.iov_base;
@@ -1247,9 +1215,8 @@ static int get_iovec_page_array(const struct iovec __user *iov,
 		if (npages > PIPE_BUFFERS - buffers)
 			npages = PIPE_BUFFERS - buffers;
 
-		error = get_user_pages(current, current->mm,
-				       (unsigned long) base, npages, 0, 0,
-				       &pages[buffers], NULL);
+		error = get_user_pages_fast((unsigned long)base, npages,
+					0, &pages[buffers]);
 
 		if (unlikely(error <= 0))
 			break;
@@ -1288,8 +1255,6 @@ static int get_iovec_page_array(const struct iovec __user *iov,
 		iov++;
 	}
 
-	up_read(&current->mm->mmap_sem);
-
 	if (buffers)
 		return buffers;
 
diff --git a/fs/stat.c b/fs/stat.c
index 9cf41f719d50..7c46fbeb8b76 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -57,13 +57,13 @@ EXPORT_SYMBOL(vfs_getattr);
 
 int vfs_stat_fd(int dfd, char __user *name, struct kstat *stat)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = __user_walk_fd(dfd, name, LOOKUP_FOLLOW, &nd);
+	error = user_path_at(dfd, name, LOOKUP_FOLLOW, &path);
 	if (!error) {
-		error = vfs_getattr(nd.path.mnt, nd.path.dentry, stat);
-		path_put(&nd.path);
+		error = vfs_getattr(path.mnt, path.dentry, stat);
+		path_put(&path);
 	}
 	return error;
 }
@@ -77,13 +77,13 @@ EXPORT_SYMBOL(vfs_stat);
 
 int vfs_lstat_fd(int dfd, char __user *name, struct kstat *stat)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = __user_walk_fd(dfd, name, 0, &nd);
+	error = user_path_at(dfd, name, 0, &path);
 	if (!error) {
-		error = vfs_getattr(nd.path.mnt, nd.path.dentry, stat);
-		path_put(&nd.path);
+		error = vfs_getattr(path.mnt, path.dentry, stat);
+		path_put(&path);
 	}
 	return error;
 }
@@ -291,29 +291,29 @@ asmlinkage long sys_newfstat(unsigned int fd, struct stat __user *statbuf)
 	return error;
 }
 
-asmlinkage long sys_readlinkat(int dfd, const char __user *path,
+asmlinkage long sys_readlinkat(int dfd, const char __user *pathname,
 				char __user *buf, int bufsiz)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
 	if (bufsiz <= 0)
 		return -EINVAL;
 
-	error = __user_walk_fd(dfd, path, 0, &nd);
+	error = user_path_at(dfd, pathname, 0, &path);
 	if (!error) {
-		struct inode *inode = nd.path.dentry->d_inode;
+		struct inode *inode = path.dentry->d_inode;
 
 		error = -EINVAL;
 		if (inode->i_op && inode->i_op->readlink) {
-			error = security_inode_readlink(nd.path.dentry);
+			error = security_inode_readlink(path.dentry);
 			if (!error) {
-				touch_atime(nd.path.mnt, nd.path.dentry);
-				error = inode->i_op->readlink(nd.path.dentry,
+				touch_atime(path.mnt, path.dentry);
+				error = inode->i_op->readlink(path.dentry,
 							      buf, bufsiz);
 			}
 		}
-		path_put(&nd.path);
+		path_put(&path);
 	}
 	return error;
 }
diff --git a/fs/super.c b/fs/super.c
index 453877c5697b..e931ae9511fe 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -70,6 +70,7 @@ static struct super_block *alloc_super(struct file_system_type *type)
 		INIT_LIST_HEAD(&s->s_instances);
 		INIT_HLIST_HEAD(&s->s_anon);
 		INIT_LIST_HEAD(&s->s_inodes);
+		INIT_LIST_HEAD(&s->s_dentry_lru);
 		init_rwsem(&s->s_umount);
 		mutex_init(&s->s_lock);
 		lockdep_set_class(&s->s_umount, &type->s_umount_key);
diff --git a/fs/sync.c b/fs/sync.c
index 228e17b5e9ee..2967562d416f 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -139,7 +139,8 @@ asmlinkage long sys_fdatasync(unsigned int fd)
  * before performing the write.
  *
  * SYNC_FILE_RANGE_WRITE: initiate writeout of all those dirty pages in the
- * range which are not presently under writeback.
+ * range which are not presently under writeback. Note that this may block for
+ * significant periods due to exhaustion of disk request structures.
  *
  * SYNC_FILE_RANGE_WAIT_AFTER: wait upon writeout of all pages in the range
  * after performing the write.
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index c1a7efb310bf..aedaeba82ae5 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -459,11 +459,8 @@ int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd)
 	int ret;
 
 	ret = __sysfs_add_one(acxt, sd);
-	if (ret == -EEXIST) {
-		printk(KERN_WARNING "sysfs: duplicate filename '%s' "
+	WARN(ret == -EEXIST, KERN_WARNING "sysfs: duplicate filename '%s' "
 		       "can not be created\n", sd->s_name);
-		WARN_ON(1);
-	}
 	return ret;
 }
 
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 3f07893ff896..c9e4e5091da1 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -337,9 +337,8 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
 	if (kobj->ktype && kobj->ktype->sysfs_ops)
 		ops = kobj->ktype->sysfs_ops;
 	else {
-		printk(KERN_ERR "missing sysfs attribute operations for "
+		WARN(1, KERN_ERR "missing sysfs attribute operations for "
 		       "kobject: %s\n", kobject_name(kobj));
-		WARN_ON(1);
 		goto err_out;
 	}
 
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index eeba38417b1d..fe611949a7f7 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -134,9 +134,8 @@ void sysfs_remove_group(struct kobject * kobj,
 	if (grp->name) {
 		sd = sysfs_get_dirent(dir_sd, grp->name);
 		if (!sd) {
-			printk(KERN_WARNING "sysfs group %p not found for "
+			WARN(!sd, KERN_WARNING "sysfs group %p not found for "
 				"kobject '%s'\n", grp, kobject_name(kobj));
-			WARN_ON(!sd);
 			return;
 		}
 	} else
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index c5d60de0658f..df0d435baa48 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -326,7 +326,7 @@ static void sysv_destroy_inode(struct inode *inode)
 	kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *p)
+static void init_once(void *p)
 {
 	struct sysv_inode_info *si = (struct sysv_inode_info *)p;
 
diff --git a/fs/timerfd.c b/fs/timerfd.c
index d87d354ec424..c502c60e4f54 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c
@@ -184,7 +184,11 @@ asmlinkage long sys_timerfd_create(int clockid, int flags)
 	int ufd;
 	struct timerfd_ctx *ctx;
 
-	if (flags)
+	/* Check the TFD_* constants for consistency.  */
+	BUILD_BUG_ON(TFD_CLOEXEC != O_CLOEXEC);
+	BUILD_BUG_ON(TFD_NONBLOCK != O_NONBLOCK);
+
+	if (flags & ~(TFD_CLOEXEC | TFD_NONBLOCK))
 		return -EINVAL;
 	if (clockid != CLOCK_MONOTONIC &&
 	    clockid != CLOCK_REALTIME)
@@ -198,7 +202,8 @@ asmlinkage long sys_timerfd_create(int clockid, int flags)
 	ctx->clockid = clockid;
 	hrtimer_init(&ctx->tmr, clockid, HRTIMER_MODE_ABS);
 
-	ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx);
+	ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx,
+			       flags & (O_CLOEXEC | O_NONBLOCK));
 	if (ufd < 0)
 		kfree(ctx);
 
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 005a3b854d96..8565e586e533 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -53,6 +53,7 @@
 
 #include "ubifs.h"
 #include <linux/mount.h>
+#include <linux/namei.h>
 
 static int read_block(struct inode *inode, void *addr, unsigned int block,
 		      struct ubifs_data_node *dn)
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 00eb9c68ad03..ca1e2d4e03cc 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1841,7 +1841,7 @@ static struct file_system_type ubifs_fs_type = {
 /*
  * Inode slab cache constructor.
  */
-static void inode_slab_ctor(struct kmem_cache *cachep, void *obj)
+static void inode_slab_ctor(void *obj)
 {
 	struct ubifs_inode *ui = obj;
 	inode_init_once(&ui->vfs_inode);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 44cc702f96cc..5698bbf83bbf 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -148,7 +148,7 @@ static void udf_destroy_inode(struct inode *inode)
 	kmem_cache_free(udf_inode_cachep, UDF_I(inode));
 }
 
-static void init_once(struct kmem_cache *cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct udf_inode_info *ei = (struct udf_inode_info *)foo;
 
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 85b22b5977fa..3e30e40aa24d 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -76,6 +76,7 @@
 
 #include <linux/errno.h>
 #include <linux/fs.h>
+#include <linux/quotaops.h>
 #include <linux/slab.h>
 #include <linux/time.h>
 #include <linux/stat.h>
@@ -1232,7 +1233,7 @@ static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
 {
 	struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
 	unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
-	struct match_token *tp = tokens;
+	const struct match_token *tp = tokens;
 
 	while (tp->token != Opt_onerror_panic && tp->token != mval)
 		++tp;
@@ -1301,7 +1302,7 @@ static void ufs_destroy_inode(struct inode *inode)
 	kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
 }
 
-static void init_once(struct kmem_cache * cachep, void *foo)
+static void init_once(void *foo)
 {
 	struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
 
diff --git a/fs/utimes.c b/fs/utimes.c
index b6b664e7145e..6929e3e91d05 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -48,66 +48,22 @@ static bool nsec_valid(long nsec)
 	return nsec >= 0 && nsec <= 999999999;
 }
 
-/* If times==NULL, set access and modification to current time,
- * must be owner or have write permission.
- * Else, update from *times, must be owner or super user.
- */
-long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags)
+static int utimes_common(struct path *path, struct timespec *times)
 {
 	int error;
-	struct nameidata nd;
-	struct dentry *dentry;
-	struct inode *inode;
 	struct iattr newattrs;
-	struct file *f = NULL;
-	struct vfsmount *mnt;
-
-	error = -EINVAL;
-	if (times && (!nsec_valid(times[0].tv_nsec) ||
-		      !nsec_valid(times[1].tv_nsec))) {
-		goto out;
-	}
-
-	if (flags & ~AT_SYMLINK_NOFOLLOW)
-		goto out;
-
-	if (filename == NULL && dfd != AT_FDCWD) {
-		error = -EINVAL;
-		if (flags & AT_SYMLINK_NOFOLLOW)
-			goto out;
+	struct inode *inode = path->dentry->d_inode;
 
-		error = -EBADF;
-		f = fget(dfd);
-		if (!f)
-			goto out;
-		dentry = f->f_path.dentry;
-		mnt = f->f_path.mnt;
-	} else {
-		error = __user_walk_fd(dfd, filename, (flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW, &nd);
-		if (error)
-			goto out;
-
-		dentry = nd.path.dentry;
-		mnt = nd.path.mnt;
-	}
-
-	inode = dentry->d_inode;
-
-	error = mnt_want_write(mnt);
+	error = mnt_want_write(path->mnt);
 	if (error)
-		goto dput_and_out;
+		goto out;
 
 	if (times && times[0].tv_nsec == UTIME_NOW &&
 		     times[1].tv_nsec == UTIME_NOW)
 		times = NULL;
 
-	/* In most cases, the checks are done in inode_change_ok() */
 	newattrs.ia_valid = ATTR_CTIME | ATTR_MTIME | ATTR_ATIME;
 	if (times) {
-		error = -EPERM;
-                if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
-			goto mnt_drop_write_and_out;
-
 		if (times[0].tv_nsec == UTIME_OMIT)
 			newattrs.ia_valid &= ~ATTR_ATIME;
 		else if (times[0].tv_nsec != UTIME_NOW) {
@@ -123,21 +79,13 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
 			newattrs.ia_mtime.tv_nsec = times[1].tv_nsec;
 			newattrs.ia_valid |= ATTR_MTIME_SET;
 		}
-
 		/*
-		 * For the UTIME_OMIT/UTIME_NOW and UTIME_NOW/UTIME_OMIT
-		 * cases, we need to make an extra check that is not done by
-		 * inode_change_ok().
+		 * Tell inode_change_ok(), that this is an explicit time
+		 * update, even if neither ATTR_ATIME_SET nor ATTR_MTIME_SET
+		 * were used.
 		 */
-		if (((times[0].tv_nsec == UTIME_NOW &&
-			    times[1].tv_nsec == UTIME_OMIT)
-		     ||
-		     (times[0].tv_nsec == UTIME_OMIT &&
-			    times[1].tv_nsec == UTIME_NOW))
-		    && !is_owner_or_cap(inode))
-			goto mnt_drop_write_and_out;
+		newattrs.ia_valid |= ATTR_TIMES_SET;
 	} else {
-
 		/*
 		 * If times is NULL (or both times are UTIME_NOW),
 		 * then we need to check permissions, because
@@ -148,21 +96,76 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
 			goto mnt_drop_write_and_out;
 
 		if (!is_owner_or_cap(inode)) {
-			error = permission(inode, MAY_WRITE, NULL);
+			error = inode_permission(inode, MAY_WRITE);
 			if (error)
 				goto mnt_drop_write_and_out;
 		}
 	}
 	mutex_lock(&inode->i_mutex);
-	error = notify_change(dentry, &newattrs);
+	error = notify_change(path->dentry, &newattrs);
 	mutex_unlock(&inode->i_mutex);
+
 mnt_drop_write_and_out:
-	mnt_drop_write(mnt);
-dput_and_out:
-	if (f)
-		fput(f);
-	else
-		path_put(&nd.path);
+	mnt_drop_write(path->mnt);
+out:
+	return error;
+}
+
+/*
+ * do_utimes - change times on filename or file descriptor
+ * @dfd: open file descriptor, -1 or AT_FDCWD
+ * @filename: path name or NULL
+ * @times: new times or NULL
+ * @flags: zero or more flags (only AT_SYMLINK_NOFOLLOW for the moment)
+ *
+ * If filename is NULL and dfd refers to an open file, then operate on
+ * the file.  Otherwise look up filename, possibly using dfd as a
+ * starting point.
+ *
+ * If times==NULL, set access and modification to current time,
+ * must be owner or have write permission.
+ * Else, update from *times, must be owner or super user.
+ */
+long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags)
+{
+	int error = -EINVAL;
+
+	if (times && (!nsec_valid(times[0].tv_nsec) ||
+		      !nsec_valid(times[1].tv_nsec))) {
+		goto out;
+	}
+
+	if (flags & ~AT_SYMLINK_NOFOLLOW)
+		goto out;
+
+	if (filename == NULL && dfd != AT_FDCWD) {
+		struct file *file;
+
+		if (flags & AT_SYMLINK_NOFOLLOW)
+			goto out;
+
+		file = fget(dfd);
+		error = -EBADF;
+		if (!file)
+			goto out;
+
+		error = utimes_common(&file->f_path, times);
+		fput(file);
+	} else {
+		struct path path;
+		int lookup_flags = 0;
+
+		if (!(flags & AT_SYMLINK_NOFOLLOW))
+			lookup_flags |= LOOKUP_FOLLOW;
+
+		error = user_path_at(dfd, filename, lookup_flags, &path);
+		if (error)
+			goto out;
+
+		error = utimes_common(&path, times);
+		path_put(&path);
+	}
+
 out:
 	return error;
 }
diff --git a/fs/vfat/namei.c b/fs/vfat/namei.c
index b546ba69be82..155c10b4adbd 100644
--- a/fs/vfat/namei.c
+++ b/fs/vfat/namei.c
@@ -621,7 +621,7 @@ shortname:
 	memcpy(de->name, msdos_name, MSDOS_NAME);
 	de->attr = is_dir ? ATTR_DIR : ATTR_ARCH;
 	de->lcase = lcase;
-	fat_date_unix2dos(ts->tv_sec, &time, &date);
+	fat_date_unix2dos(ts->tv_sec, &time, &date, sbi->options.tz_utc);
 	de->time = de->ctime = time;
 	de->date = de->cdate = de->adate = date;
 	de->ctime_cs = 0;
diff --git a/fs/xattr.c b/fs/xattr.c
index 4706a8b1f495..468377e66531 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -63,7 +63,7 @@ xattr_permission(struct inode *inode, const char *name, int mask)
 			return -EPERM;
 	}
 
-	return permission(inode, mask, NULL);
+	return inode_permission(inode, mask);
 }
 
 int
@@ -252,40 +252,40 @@ setxattr(struct dentry *d, const char __user *name, const void __user *value,
 }
 
 asmlinkage long
-sys_setxattr(const char __user *path, const char __user *name,
+sys_setxattr(const char __user *pathname, const char __user *name,
 	     const void __user *value, size_t size, int flags)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (error)
 		return error;
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (!error) {
-		error = setxattr(nd.path.dentry, name, value, size, flags);
-		mnt_drop_write(nd.path.mnt);
+		error = setxattr(path.dentry, name, value, size, flags);
+		mnt_drop_write(path.mnt);
 	}
-	path_put(&nd.path);
+	path_put(&path);
 	return error;
 }
 
 asmlinkage long
-sys_lsetxattr(const char __user *path, const char __user *name,
+sys_lsetxattr(const char __user *pathname, const char __user *name,
 	      const void __user *value, size_t size, int flags)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = user_path_walk_link(path, &nd);
+	error = user_lpath(pathname, &path);
 	if (error)
 		return error;
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (!error) {
-		error = setxattr(nd.path.dentry, name, value, size, flags);
-		mnt_drop_write(nd.path.mnt);
+		error = setxattr(path.dentry, name, value, size, flags);
+		mnt_drop_write(path.mnt);
 	}
-	path_put(&nd.path);
+	path_put(&path);
 	return error;
 }
 
@@ -350,32 +350,32 @@ getxattr(struct dentry *d, const char __user *name, void __user *value,
 }
 
 asmlinkage ssize_t
-sys_getxattr(const char __user *path, const char __user *name,
+sys_getxattr(const char __user *pathname, const char __user *name,
 	     void __user *value, size_t size)
 {
-	struct nameidata nd;
+	struct path path;
 	ssize_t error;
 
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (error)
 		return error;
-	error = getxattr(nd.path.dentry, name, value, size);
-	path_put(&nd.path);
+	error = getxattr(path.dentry, name, value, size);
+	path_put(&path);
 	return error;
 }
 
 asmlinkage ssize_t
-sys_lgetxattr(const char __user *path, const char __user *name, void __user *value,
+sys_lgetxattr(const char __user *pathname, const char __user *name, void __user *value,
 	      size_t size)
 {
-	struct nameidata nd;
+	struct path path;
 	ssize_t error;
 
-	error = user_path_walk_link(path, &nd);
+	error = user_lpath(pathname, &path);
 	if (error)
 		return error;
-	error = getxattr(nd.path.dentry, name, value, size);
-	path_put(&nd.path);
+	error = getxattr(path.dentry, name, value, size);
+	path_put(&path);
 	return error;
 }
 
@@ -425,30 +425,30 @@ listxattr(struct dentry *d, char __user *list, size_t size)
 }
 
 asmlinkage ssize_t
-sys_listxattr(const char __user *path, char __user *list, size_t size)
+sys_listxattr(const char __user *pathname, char __user *list, size_t size)
 {
-	struct nameidata nd;
+	struct path path;
 	ssize_t error;
 
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (error)
 		return error;
-	error = listxattr(nd.path.dentry, list, size);
-	path_put(&nd.path);
+	error = listxattr(path.dentry, list, size);
+	path_put(&path);
 	return error;
 }
 
 asmlinkage ssize_t
-sys_llistxattr(const char __user *path, char __user *list, size_t size)
+sys_llistxattr(const char __user *pathname, char __user *list, size_t size)
 {
-	struct nameidata nd;
+	struct path path;
 	ssize_t error;
 
-	error = user_path_walk_link(path, &nd);
+	error = user_lpath(pathname, &path);
 	if (error)
 		return error;
-	error = listxattr(nd.path.dentry, list, size);
-	path_put(&nd.path);
+	error = listxattr(path.dentry, list, size);
+	path_put(&path);
 	return error;
 }
 
@@ -486,38 +486,38 @@ removexattr(struct dentry *d, const char __user *name)
 }
 
 asmlinkage long
-sys_removexattr(const char __user *path, const char __user *name)
+sys_removexattr(const char __user *pathname, const char __user *name)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = user_path_walk(path, &nd);
+	error = user_path(pathname, &path);
 	if (error)
 		return error;
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (!error) {
-		error = removexattr(nd.path.dentry, name);
-		mnt_drop_write(nd.path.mnt);
+		error = removexattr(path.dentry, name);
+		mnt_drop_write(path.mnt);
 	}
-	path_put(&nd.path);
+	path_put(&path);
 	return error;
 }
 
 asmlinkage long
-sys_lremovexattr(const char __user *path, const char __user *name)
+sys_lremovexattr(const char __user *pathname, const char __user *name)
 {
-	struct nameidata nd;
+	struct path path;
 	int error;
 
-	error = user_path_walk_link(path, &nd);
+	error = user_lpath(pathname, &path);
 	if (error)
 		return error;
-	error = mnt_want_write(nd.path.mnt);
+	error = mnt_want_write(path.mnt);
 	if (!error) {
-		error = removexattr(nd.path.dentry, name);
-		mnt_drop_write(nd.path.mnt);
+		error = removexattr(path.dentry, name);
+		mnt_drop_write(path.mnt);
 	}
-	path_put(&nd.path);
+	path_put(&path);
 	return error;
 }
 
diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index 5e9564902976..a20683cf74dd 100644
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -79,7 +79,7 @@ kmem_zone_init(int size, char *zone_name)
 
 static inline kmem_zone_t *
 kmem_zone_init_flags(int size, char *zone_name, unsigned long flags,
-		     void (*construct)(kmem_zone_t *, void *))
+		     void (*construct)(void *))
 {
 	return kmem_cache_create(zone_name, size, 0, flags, construct);
 }
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index a42ba9d71156..01939ba2d8de 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -84,17 +84,15 @@ xfs_find_handle(
 	switch (cmd) {
 	case XFS_IOC_PATH_TO_FSHANDLE:
 	case XFS_IOC_PATH_TO_HANDLE: {
-		struct nameidata	nd;
-		int			error;
-
-		error = user_path_walk_link((const char __user *)hreq.path, &nd);
+		struct path path;
+		int error = user_lpath((const char __user *)hreq.path, &path);
 		if (error)
 			return error;
 
-		ASSERT(nd.path.dentry);
-		ASSERT(nd.path.dentry->d_inode);
-		inode = igrab(nd.path.dentry->d_inode);
-		path_put(&nd.path);
+		ASSERT(path.dentry);
+		ASSERT(path.dentry->d_inode);
+		inode = igrab(path.dentry->d_inode);
+		path_put(&path);
 		break;
 	}
 
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 2bf287ef5489..5fc61c824bb9 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -589,8 +589,7 @@ xfs_check_acl(
 STATIC int
 xfs_vn_permission(
 	struct inode		*inode,
-	int			mask,
-	struct nameidata	*nd)
+	int			mask)
 {
 	return generic_permission(inode, mask, xfs_check_acl);
 }
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 5e3b57516ec7..82333b3e118e 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -711,7 +711,7 @@ start:
 	     !capable(CAP_FSETID)) {
 		error = xfs_write_clear_setuid(xip);
 		if (likely(!error))
-			error = -remove_suid(file->f_path.dentry);
+			error = -file_remove_suid(file);
 		if (unlikely(error)) {
 			goto out_unlock_internal;
 		}
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 742b2c7852c1..943381284e2e 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -843,7 +843,6 @@ xfs_fs_destroy_inode(
 
 STATIC void
 xfs_fs_inode_init_once(
-	kmem_zone_t		*zonep,
 	void			*vnode)
 {
 	inode_init_once(vn_to_inode((bhv_vnode_t *)vnode));