Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull the big VFS changes from Al Viro:
 "This one is *big* and changes quite a few things around VFS.  What's in there:

   - the first of two really major architecture changes - death to open
     intents.

     The former is finally there; it was very long in making, but with
     Miklos getting through really hard and messy final push in
     fs/namei.c, we finally have it.  Unlike his variant, this one
     doesn't introduce struct opendata; what we have instead is
     ->atomic_open() taking preallocated struct file * and passing
     everything via its fields.

     Instead of returning struct file *, it returns -E...  on error, 0
     on success and 1 in "deal with it yourself" case (e.g.  symlink
     found on server, etc.).

     See comments before fs/namei.c:atomic_open().  That made a lot of
     goodies finally possible and quite a few are in that pile:
     ->lookup(), ->d_revalidate() and ->create() do not get struct
     nameidata * anymore; ->lookup() and ->d_revalidate() get lookup
     flags instead, ->create() gets "do we want it exclusive" flag.

     With the introduction of new helper (kern_path_locked()) we are rid
     of all struct nameidata instances outside of fs/namei.c; it's still
     visible in namei.h, but not for long.  Come the next cycle,
     declaration will move either to fs/internal.h or to fs/namei.c
     itself.  [me, miklos, hch]

   - The second major change: behaviour of final fput().  Now we have
     __fput() done without any locks held by caller *and* not from deep
     in call stack.

     That obviously lifts a lot of constraints on the locking in there.
     Moreover, it's legal now to call fput() from atomic contexts (which
     has immediately simplified life for aio.c).  We also don't need
     anti-recursion logics in __scm_destroy() anymore.

     There is a price, though - the damn thing has become partially
     asynchronous.  For fput() from normal process we are guaranteed
     that pending __fput() will be done before the caller returns to
     userland, exits or gets stopped for ptrace.

     For kernel threads and atomic contexts it's done via
     schedule_work(), so theoretically we might need a way to make sure
     it's finished; so far only one such place had been found, but there
     might be more.

     There's flush_delayed_fput() (do all pending __fput()) and there's
     __fput_sync() (fput() analog doing __fput() immediately).  I hope
     we won't need them often; see warnings in fs/file_table.c for
     details.  [me, based on task_work series from Oleg merged last
     cycle]

   - sync series from Jan

   - large part of "death to sync_supers()" work from Artem; the only
     bits missing here are exofs and ext4 ones.  As far as I understand,
     those are going via the exofs and ext4 trees resp.; once they are
     in, we can put ->write_super() to the rest, along with the thread
     calling it.

   - preparatory bits from unionmount series (from dhowells).

   - assorted cleanups and fixes all over the place, as usual.

  This is not the last pile for this cycle; there's at least jlayton's
  ESTALE work and fsfreeze series (the latter - in dire need of fixes,
  so I'm not sure it'll make the cut this cycle).  I'll probably throw
  symlink/hardlink restrictions stuff from Kees into the next pile, too.
  Plus there's a lot of misc patches I hadn't thrown into that one -
  it's large enough as it is..."

* 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (127 commits)
  ext4: switch EXT4_IOC_RESIZE_FS to mnt_want_write_file()
  btrfs: switch btrfs_ioctl_balance() to mnt_want_write_file()
  switch dentry_open() to struct path, make it grab references itself
  spufs: shift dget/mntget towards dentry_open()
  zoran: don't bother with struct file * in zoran_map
  ecryptfs: don't reinvent the wheels, please - use struct completion
  don't expose I_NEW inodes via dentry->d_inode
  tidy up namei.c a bit
  unobfuscate follow_up() a bit
  ext3: pass custom EOF to generic_file_llseek_size()
  ext4: use core vfs llseek code for dir seeks
  vfs: allow custom EOF in generic_file_llseek code
  vfs: Avoid unnecessary WB_SYNC_NONE writeback during sys_sync and reorder sync passes
  vfs: Remove unnecessary flushing of block devices
  vfs: Make sys_sync writeout also block device inodes
  vfs: Create function for iterating over block devices
  vfs: Reorder operations during sys_sync
  quota: Move quota syncing to ->sync_fs method
  quota: Split dquot_quota_sync() to writeback and cache flushing part
  vfs: Move noop_backing_dev_info check from sync into writeback
  ...

210 files changed, 2607 insertions, 2396 deletions

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 8e2da1e06e3b..e0cce2a5f820 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -9,7 +9,7 @@ be able to use diff(1).
 
 --------------------------- dentry_operations --------------------------
 prototypes:
-        int (*d_revalidate)(struct dentry *, struct nameidata *);
+        int (*d_revalidate)(struct dentry *, unsigned int);
         int (*d_hash)(const struct dentry *, const struct inode *,
                         struct qstr *);
         int (*d_compare)(const struct dentry *, const struct inode *,
@@ -37,9 +37,8 @@ d_manage:	no		no		yes (ref-walk)	maybe
 
 --------------------------- inode_operations --------------------------- 
 prototypes:
-        int (*create) (struct inode *,struct dentry *,umode_t, struct nameidata *);
-        struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameid
-ata *);
+        int (*create) (struct inode *,struct dentry *,umode_t, bool);
+        struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
         int (*link) (struct dentry *,struct inode *,struct dentry *);
         int (*unlink) (struct inode *,struct dentry *);
         int (*symlink) (struct inode *,struct dentry *,const char *);
@@ -62,6 +61,9 @@ ata *);
         int (*removexattr) (struct dentry *, const char *);
         int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start, u64 len);
         void (*update_time)(struct inode *, struct timespec *, int);
+        int (*atomic_open)(struct inode *, struct dentry *,
+                                struct file *, unsigned open_flag,
+                                umode_t create_mode, int *opened);
 
 locking rules:
         all may block
@@ -89,6 +91,7 @@ listxattr:	no
 removexattr:    yes
 fiemap:         no
 update_time:    no
+atomic_open:    yes
 
         Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
 victim.
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 8c91d1057d9a..2bef2b3843d1 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -355,12 +355,10 @@ protects *all* the dcache state of a given dentry.
 via rcu-walk path walk (basically, if the file can have had a path name in the
 vfs namespace).
 
-        i_dentry and i_rcu share storage in a union, and the vfs expects
-i_dentry to be reinitialized before it is freed, so an:
-
-  INIT_LIST_HEAD(&inode->i_dentry);
-
-must be done in the RCU callback.
+        Even though i_dentry and i_rcu share storage in a union, we will
+initialize the former in inode_init_always(), so just leave it alone in
+the callback.  It used to be necessary to clean it there, but not anymore
+(starting at 3.2).
 
 --
 [recommended]
@@ -433,3 +431,14 @@ release it yourself.
         d_alloc_root() is gone, along with a lot of bugs caused by code
 misusing it.  Replacement: d_make_root(inode).  The difference is,
 d_make_root() drops the reference to inode if dentry allocation fails.  
+
+--
+[mandatory]
+        The witch is dead!  Well, 2/3 of it, anyway.  ->d_revalidate() and
+->lookup() do *not* take struct nameidata anymore; just the flags.
+--
+[mandatory]
+        ->create() doesn't take struct nameidata *; unlike the previous
+two, it gets "is it an O_EXCL or equivalent?" boolean argument.  Note that
+local filesystems can ignore tha argument - they are guaranteed that the
+object doesn't exist.  It's remote/distributed ones that might care...
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index efd23f481704..aa754e01464e 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -341,8 +341,8 @@ This describes how the VFS can manipulate an inode in your
 filesystem. As of kernel 2.6.22, the following members are defined:
 
 struct inode_operations {
-        int (*create) (struct inode *,struct dentry *, umode_t, struct nameidata *);
-        struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
+        int (*create) (struct inode *,struct dentry *, umode_t, bool);
+        struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
         int (*link) (struct dentry *,struct inode *,struct dentry *);
         int (*unlink) (struct inode *,struct dentry *);
         int (*symlink) (struct inode *,struct dentry *,const char *);
@@ -364,6 +364,9 @@ struct inode_operations {
         ssize_t (*listxattr) (struct dentry *, char *, size_t);
         int (*removexattr) (struct dentry *, const char *);
         void (*update_time)(struct inode *, struct timespec *, int);
+        int (*atomic_open)(struct inode *, struct dentry *,
+                                struct file *, unsigned open_flag,
+                                umode_t create_mode, int *opened);
 };
 
 Again, all methods are called without any locks being held, unless
@@ -476,6 +479,14 @@ otherwise noted.
         an inode.  If this is not defined the VFS will update the inode itself
         and call mark_inode_dirty_sync.
 
+  atomic_open: called on the last component of an open.  Using this optional
+        method the filesystem can look up, possibly create and open the file in
+        one atomic operation.  If it cannot perform this (e.g. the file type
+        turned out to be wrong) it may signal this by returning 1 instead of
+        usual 0 or -ve .  This method is only called if the last
+        component is negative or needs lookup.  Cached positive dentries are
+        still handled by f_op->open().
+
 The Address Space Object
 ========================
 
@@ -891,7 +902,7 @@ the VFS uses a default. As of kernel 2.6.22, the following members are
 defined:
 
 struct dentry_operations {
-        int (*d_revalidate)(struct dentry *, struct nameidata *);
+        int (*d_revalidate)(struct dentry *, unsigned int);
         int (*d_hash)(const struct dentry *, const struct inode *,
                         struct qstr *);
         int (*d_compare)(const struct dentry *, const struct inode *,
@@ -910,11 +921,11 @@ struct dentry_operations {
         dcache. Most filesystems leave this as NULL, because all their
         dentries in the dcache are valid
 
-        d_revalidate may be called in rcu-walk mode (nd->flags & LOOKUP_RCU).
+        d_revalidate may be called in rcu-walk mode (flags & LOOKUP_RCU).
         If in rcu-walk mode, the filesystem must revalidate the dentry without
         blocking or storing to the dentry, d_parent and d_inode should not be
-        used without care (because they can go NULL), instead nd->inode should
-        be used.
+        used without care (because they can change and, in d_inode case, even
+        become NULL under us).
 
         If a situation is encountered that rcu-walk cannot handle, return
         -ECHILD and it will be called again in ref-walk mode.
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 66519d263da7..d544d7816df3 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -317,28 +317,23 @@ out:
         return ret;
 }
 
-static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt)
+static int spufs_context_open(struct path *path)
 {
         int ret;
         struct file *filp;
 
         ret = get_unused_fd();
-        if (ret < 0) {
-                dput(dentry);
-                mntput(mnt);
-                goto out;
-        }
+        if (ret < 0)
+                return ret;
 
-        filp = dentry_open(dentry, mnt, O_RDONLY, current_cred());
+        filp = dentry_open(path, O_RDONLY, current_cred());
         if (IS_ERR(filp)) {
                 put_unused_fd(ret);
-                ret = PTR_ERR(filp);
-                goto out;
+                return PTR_ERR(filp);
         }
 
         filp->f_op = &spufs_context_fops;
         fd_install(ret, filp);
-out:
         return ret;
 }
 
@@ -453,6 +448,7 @@ spufs_create_context(struct inode *inode, struct dentry *dentry,
         int affinity;
         struct spu_gang *gang;
         struct spu_context *neighbor;
+        struct path path = {.mnt = mnt, .dentry = dentry};
 
         ret = -EPERM;
         if ((flags & SPU_CREATE_NOSCHED) &&
@@ -495,11 +491,7 @@ spufs_create_context(struct inode *inode, struct dentry *dentry,
                         put_spu_context(neighbor);
         }
 
-        /*
-         * get references for dget and mntget, will be released
-         * in error path of *_open().
-         */
-        ret = spufs_context_open(dget(dentry), mntget(mnt));
+        ret = spufs_context_open(&path);
         if (ret < 0) {
                 WARN_ON(spufs_rmdir(inode, dentry));
                 if (affinity)
@@ -556,28 +548,27 @@ out:
         return ret;
 }
 
-static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt)
+static int spufs_gang_open(struct path *path)
 {
         int ret;
         struct file *filp;
 
         ret = get_unused_fd();
-        if (ret < 0) {
-                dput(dentry);
-                mntput(mnt);
-                goto out;
-        }
+        if (ret < 0)
+                return ret;
 
-        filp = dentry_open(dentry, mnt, O_RDONLY, current_cred());
+        /*
+         * get references for dget and mntget, will be released
+         * in error path of *_open().
+         */
+        filp = dentry_open(path, O_RDONLY, current_cred());
         if (IS_ERR(filp)) {
                 put_unused_fd(ret);
-                ret = PTR_ERR(filp);
-                goto out;
+                return PTR_ERR(filp);
         }
 
         filp->f_op = &simple_dir_operations;
         fd_install(ret, filp);
-out:
         return ret;
 }
 
@@ -585,17 +576,14 @@ static int spufs_create_gang(struct inode *inode,
                         struct dentry *dentry,
                         struct vfsmount *mnt, umode_t mode)
 {
+        struct path path = {.mnt = mnt, .dentry = dentry};
         int ret;
 
         ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO);
         if (ret)
                 goto out;
 
-        /*
-         * get references for dget and mntget, will be released
-         * in error path of *_open().
-         */
-        ret = spufs_gang_open(dget(dentry), mntget(mnt));
+        ret = spufs_gang_open(&path);
         if (ret < 0) {
                 int err = simple_rmdir(inode, dentry);
                 WARN_ON(err);
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 765c3a28077a..d91a3a0b2325 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -227,33 +227,24 @@ static int handle_create(const char *nodename, umode_t mode, struct device *dev)
 
 static int dev_rmdir(const char *name)
 {
-        struct nameidata nd;
+        struct path parent;
         struct dentry *dentry;
         int err;
 
-        err = kern_path_parent(name, &nd);
-        if (err)
-                return err;
-
-        mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
-        dentry = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
-        if (!IS_ERR(dentry)) {
-                if (dentry->d_inode) {
-                        if (dentry->d_inode->i_private == &thread)
-                                err = vfs_rmdir(nd.path.dentry->d_inode,
-                                                dentry);
-                        else
-                                err = -EPERM;
-                } else {
-                        err = -ENOENT;
-                }
-                dput(dentry);
+        dentry = kern_path_locked(name, &parent);
+        if (IS_ERR(dentry))
+                return PTR_ERR(dentry);
+        if (dentry->d_inode) {
+                if (dentry->d_inode->i_private == &thread)
+                        err = vfs_rmdir(parent.dentry->d_inode, dentry);
+                else
+                        err = -EPERM;
         } else {
-                err = PTR_ERR(dentry);
+                err = -ENOENT;
         }
-
-        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-        path_put(&nd.path);
+        dput(dentry);
+        mutex_unlock(&parent.dentry->d_inode->i_mutex);
+        path_put(&parent);
         return err;
 }
 
@@ -305,50 +296,43 @@ static int dev_mynode(struct device *dev, struct inode *inode, struct kstat *sta
 
 static int handle_remove(const char *nodename, struct device *dev)
 {
-        struct nameidata nd;
+        struct path parent;
         struct dentry *dentry;
-        struct kstat stat;
         int deleted = 1;
         int err;
 
-        err = kern_path_parent(nodename, &nd);
-        if (err)
-                return err;
+        dentry = kern_path_locked(nodename, &parent);
+        if (IS_ERR(dentry))
+                return PTR_ERR(dentry);
 
-        mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
-        dentry = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
-        if (!IS_ERR(dentry)) {
-                if (dentry->d_inode) {
-                        err = vfs_getattr(nd.path.mnt, dentry, &stat);
-                        if (!err && dev_mynode(dev, dentry->d_inode, &stat)) {
-                                struct iattr newattrs;
-                                /*
-                                 * before unlinking this node, reset permissions
-                                 * of possible references like hardlinks
-                                 */
-                                newattrs.ia_uid = 0;
-                                newattrs.ia_gid = 0;
-                                newattrs.ia_mode = stat.mode & ~0777;
-                                newattrs.ia_valid =
-                                        ATTR_UID|ATTR_GID|ATTR_MODE;
-                                mutex_lock(&dentry->d_inode->i_mutex);
-                                notify_change(dentry, &newattrs);
-                                mutex_unlock(&dentry->d_inode->i_mutex);
-                                err = vfs_unlink(nd.path.dentry->d_inode,
-                                                 dentry);
-                                if (!err || err == -ENOENT)
-                                        deleted = 1;
-                        }
-                } else {
-                        err = -ENOENT;
+        if (dentry->d_inode) {
+                struct kstat stat;
+                err = vfs_getattr(parent.mnt, dentry, &stat);
+                if (!err && dev_mynode(dev, dentry->d_inode, &stat)) {
+                        struct iattr newattrs;
+                        /*
+                         * before unlinking this node, reset permissions
+                         * of possible references like hardlinks
+                         */
+                        newattrs.ia_uid = 0;
+                        newattrs.ia_gid = 0;
+                        newattrs.ia_mode = stat.mode & ~0777;
+                        newattrs.ia_valid =
+                                ATTR_UID|ATTR_GID|ATTR_MODE;
+                        mutex_lock(&dentry->d_inode->i_mutex);
+                        notify_change(dentry, &newattrs);
+                        mutex_unlock(&dentry->d_inode->i_mutex);
+                        err = vfs_unlink(parent.dentry->d_inode, dentry);
+                        if (!err || err == -ENOENT)
+                                deleted = 1;
                 }
-                dput(dentry);
         } else {
-                err = PTR_ERR(dentry);
+                err = -ENOENT;
         }
-        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+        dput(dentry);
+        mutex_unlock(&parent.dentry->d_inode->i_mutex);
 
-        path_put(&nd.path);
+        path_put(&parent);
         if (deleted && strchr(nodename, '/'))
                 delete_path(nodename);
         return err;
diff --git a/drivers/media/video/zoran/zoran.h b/drivers/media/video/zoran/zoran.h
index d7166afc255e..ca2754a3cd63 100644
--- a/drivers/media/video/zoran/zoran.h
+++ b/drivers/media/video/zoran/zoran.h
@@ -172,8 +172,10 @@ struct zoran_jpg_settings {
         struct v4l2_jpegcompression jpg_comp;   /* JPEG-specific capture settings */
 };
 
+struct zoran_fh;
+
 struct zoran_mapping {
-        struct file *file;
+        struct zoran_fh *fh;
         int count;
 };
 
diff --git a/drivers/media/video/zoran/zoran_driver.c b/drivers/media/video/zoran/zoran_driver.c
index c57310931810..c6ccdeb6d8d6 100644
--- a/drivers/media/video/zoran/zoran_driver.c
+++ b/drivers/media/video/zoran/zoran_driver.c
@@ -2811,7 +2811,7 @@ static void
 zoran_vm_close (struct vm_area_struct *vma)
 {
         struct zoran_mapping *map = vma->vm_private_data;
-        struct zoran_fh *fh = map->file->private_data;
+        struct zoran_fh *fh = map->fh;
         struct zoran *zr = fh->zr;
         int i;
 
@@ -2938,7 +2938,7 @@ zoran_mmap (struct file           *file,
                 res = -ENOMEM;
                 goto mmap_unlock_and_return;
         }
-        map->file = file;
+        map->fh = fh;
         map->count = 1;
 
         vma->vm_ops = &zoran_vm_ops;
diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index a90bfe79916d..334da5f583c0 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -63,7 +63,7 @@ static struct dentry *mount_mtd_aux(struct file_system_type *fs_type, int flags,
         struct super_block *sb;
         int ret;
 
-        sb = sget(fs_type, get_sb_mtd_compare, get_sb_mtd_set, mtd);
+        sb = sget(fs_type, get_sb_mtd_compare, get_sb_mtd_set, flags, mtd);
         if (IS_ERR(sb))
                 goto out_error;
 
@@ -74,8 +74,6 @@ static struct dentry *mount_mtd_aux(struct file_system_type *fs_type, int flags,
         pr_debug("MTDSB: New superblock for device %d (\"%s\")\n",
               mtd->index, mtd->name);
 
-        sb->s_flags = flags;
-
         ret = fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
         if (ret < 0) {
                 deactivate_locked_super(sb);
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index e78956cbd702..34c59f14a1c9 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -144,7 +144,7 @@ extern void v9fs_session_close(struct v9fs_session_info *v9ses);
 extern void v9fs_session_cancel(struct v9fs_session_info *v9ses);
 extern void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses);
 extern struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
-                        struct nameidata *nameidata);
+                        unsigned int flags);
 extern int v9fs_vfs_unlink(struct inode *i, struct dentry *d);
 extern int v9fs_vfs_rmdir(struct inode *i, struct dentry *d);
 extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index d529437ff442..64600b5d0522 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -100,13 +100,13 @@ static void v9fs_dentry_release(struct dentry *dentry)
         }
 }
 
-static int v9fs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct p9_fid *fid;
         struct inode *inode;
         struct v9fs_inode *v9inode;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         inode = dentry->d_inode;
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 57ccb7537dae..cbf9dbb1b2a2 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -712,88 +712,34 @@ error:
 }
 
 /**
- * v9fs_vfs_create - VFS hook to create files
+ * v9fs_vfs_create - VFS hook to create a regular file
+ *
+ * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open().  This is only called
+ * for mknod(2).
+ *
  * @dir: directory inode that is being created
  * @dentry:  dentry that is being deleted
  * @mode: create permissions
- * @nd: path information
  *
  */
 
 static int
 v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
-        int err;
-        u32 perm;
-        int flags;
-        struct file *filp;
-        struct v9fs_inode *v9inode;
-        struct v9fs_session_info *v9ses;
-        struct p9_fid *fid, *inode_fid;
-
-        err = 0;
-        fid = NULL;
-        v9ses = v9fs_inode2v9ses(dir);
-        perm = unixmode2p9mode(v9ses, mode);
-        if (nd)
-                flags = nd->intent.open.flags;
-        else
-                flags = O_RDWR;
+        struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
+        u32 perm = unixmode2p9mode(v9ses, mode);
+        struct p9_fid *fid;
 
-        fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
-                                v9fs_uflags2omode(flags,
-                                                v9fs_proto_dotu(v9ses)));
-        if (IS_ERR(fid)) {
-                err = PTR_ERR(fid);
-                fid = NULL;
-                goto error;
-        }
+        /* P9_OEXCL? */
+        fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR);
+        if (IS_ERR(fid))
+                return PTR_ERR(fid);
 
         v9fs_invalidate_inode_attr(dir);
-        /* if we are opening a file, assign the open fid to the file */
-        if (nd) {
-                v9inode = V9FS_I(dentry->d_inode);
-                mutex_lock(&v9inode->v_mutex);
-                if (v9ses->cache && !v9inode->writeback_fid &&
-                    ((flags & O_ACCMODE) != O_RDONLY)) {
-                        /*
-                         * clone a fid and add it to writeback_fid
-                         * we do it during open time instead of
-                         * page dirty time via write_begin/page_mkwrite
-                         * because we want write after unlink usecase
-                         * to work.
-                         */
-                        inode_fid = v9fs_writeback_fid(dentry);
-                        if (IS_ERR(inode_fid)) {
-                                err = PTR_ERR(inode_fid);
-                                mutex_unlock(&v9inode->v_mutex);
-                                goto error;
-                        }
-                        v9inode->writeback_fid = (void *) inode_fid;
-                }
-                mutex_unlock(&v9inode->v_mutex);
-                filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
-                if (IS_ERR(filp)) {
-                        err = PTR_ERR(filp);
-                        goto error;
-                }
-
-                filp->private_data = fid;
-#ifdef CONFIG_9P_FSCACHE
-                if (v9ses->cache)
-                        v9fs_cache_inode_set_cookie(dentry->d_inode, filp);
-#endif
-        } else
-                p9_client_clunk(fid);
+        p9_client_clunk(fid);
 
         return 0;
-
-error:
-        if (fid)
-                p9_client_clunk(fid);
-
-        return err;
 }
 
 /**
@@ -839,7 +785,7 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
  */
 
 struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
-                                      struct nameidata *nameidata)
+                                      unsigned int flags)
 {
         struct dentry *res;
         struct super_block *sb;
@@ -849,8 +795,8 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
         char *name;
         int result = 0;
 
-        p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
-                 dir, dentry->d_name.name, dentry, nameidata);
+        p9_debug(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p flags: %x\n",
+                 dir, dentry->d_name.name, dentry, flags);
 
         if (dentry->d_name.len > NAME_MAX)
                 return ERR_PTR(-ENAMETOOLONG);
@@ -910,6 +856,86 @@ error:
         return ERR_PTR(result);
 }
 
+static int
+v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
+                     struct file *file, unsigned flags, umode_t mode,
+                     int *opened)
+{
+        int err;
+        u32 perm;
+        struct v9fs_inode *v9inode;
+        struct v9fs_session_info *v9ses;
+        struct p9_fid *fid, *inode_fid;
+        struct dentry *res = NULL;
+
+        if (d_unhashed(dentry)) {
+                res = v9fs_vfs_lookup(dir, dentry, 0);
+                if (IS_ERR(res))
+                        return PTR_ERR(res);
+
+                if (res)
+                        dentry = res;
+        }
+
+        /* Only creates */
+        if (!(flags & O_CREAT) || dentry->d_inode)
+                return finish_no_open(file, res);
+
+        err = 0;
+        fid = NULL;
+        v9ses = v9fs_inode2v9ses(dir);
+        perm = unixmode2p9mode(v9ses, mode);
+        fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
+                                v9fs_uflags2omode(flags,
+                                                v9fs_proto_dotu(v9ses)));
+        if (IS_ERR(fid)) {
+                err = PTR_ERR(fid);
+                fid = NULL;
+                goto error;
+        }
+
+        v9fs_invalidate_inode_attr(dir);
+        v9inode = V9FS_I(dentry->d_inode);
+        mutex_lock(&v9inode->v_mutex);
+        if (v9ses->cache && !v9inode->writeback_fid &&
+            ((flags & O_ACCMODE) != O_RDONLY)) {
+                /*
+                 * clone a fid and add it to writeback_fid
+                 * we do it during open time instead of
+                 * page dirty time via write_begin/page_mkwrite
+                 * because we want write after unlink usecase
+                 * to work.
+                 */
+                inode_fid = v9fs_writeback_fid(dentry);
+                if (IS_ERR(inode_fid)) {
+                        err = PTR_ERR(inode_fid);
+                        mutex_unlock(&v9inode->v_mutex);
+                        goto error;
+                }
+                v9inode->writeback_fid = (void *) inode_fid;
+        }
+        mutex_unlock(&v9inode->v_mutex);
+        err = finish_open(file, dentry, generic_file_open, opened);
+        if (err)
+                goto error;
+
+        file->private_data = fid;
+#ifdef CONFIG_9P_FSCACHE
+        if (v9ses->cache)
+                v9fs_cache_inode_set_cookie(dentry->d_inode, file);
+#endif
+
+        *opened |= FILE_CREATED;
+out:
+        dput(res);
+        return err;
+
+error:
+        if (fid)
+                p9_client_clunk(fid);
+        goto out;
+}
+
 /**
  * v9fs_vfs_unlink - VFS unlink hook to delete an inode
  * @i:  inode that is being unlinked
@@ -1488,6 +1514,7 @@ out:
 static const struct inode_operations v9fs_dir_inode_operations_dotu = {
         .create = v9fs_vfs_create,
         .lookup = v9fs_vfs_lookup,
+        .atomic_open = v9fs_vfs_atomic_open,
         .symlink = v9fs_vfs_symlink,
         .link = v9fs_vfs_link,
         .unlink = v9fs_vfs_unlink,
@@ -1502,6 +1529,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = {
 static const struct inode_operations v9fs_dir_inode_operations = {
         .create = v9fs_vfs_create,
         .lookup = v9fs_vfs_lookup,
+        .atomic_open = v9fs_vfs_atomic_open,
         .unlink = v9fs_vfs_unlink,
         .mkdir = v9fs_vfs_mkdir,
         .rmdir = v9fs_vfs_rmdir,
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index e3dd2a1e2bfc..40895546e103 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -230,20 +230,25 @@ int v9fs_open_to_dotl_flags(int flags)
  * @dir: directory inode that is being created
  * @dentry:  dentry that is being deleted
  * @mode: create permissions
- * @nd: path information
  *
  */
 
 static int
 v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
-                struct nameidata *nd)
+                bool excl)
+{
+        return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
+}
+
+static int
+v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
+                          struct file *file, unsigned flags, umode_t omode,
+                          int *opened)
 {
         int err = 0;
         gid_t gid;
-        int flags;
         umode_t mode;
         char *name = NULL;
-        struct file *filp;
         struct p9_qid qid;
         struct inode *inode;
         struct p9_fid *fid = NULL;
@@ -251,19 +256,23 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
         struct p9_fid *dfid, *ofid, *inode_fid;
         struct v9fs_session_info *v9ses;
         struct posix_acl *pacl = NULL, *dacl = NULL;
+        struct dentry *res = NULL;
 
-        v9ses = v9fs_inode2v9ses(dir);
-        if (nd)
-                flags = nd->intent.open.flags;
-        else {
-                /*
-                 * create call without LOOKUP_OPEN is due
-                 * to mknod of regular files. So use mknod
-                 * operation.
-                 */
-                return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0);
+        if (d_unhashed(dentry)) {
+                res = v9fs_vfs_lookup(dir, dentry, 0);
+                if (IS_ERR(res))
+                        return PTR_ERR(res);
+
+                if (res)
+                        dentry = res;
         }
 
+        /* Only creates */
+        if (!(flags & O_CREAT) || dentry->d_inode)
+                return finish_no_open(file, res);
+
+        v9ses = v9fs_inode2v9ses(dir);
+
         name = (char *) dentry->d_name.name;
         p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
                  name, flags, omode);
@@ -272,7 +281,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
         if (IS_ERR(dfid)) {
                 err = PTR_ERR(dfid);
                 p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
-                return err;
+                goto out;
         }
 
         /* clone a fid to use for creation */
@@ -280,7 +289,7 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
         if (IS_ERR(ofid)) {
                 err = PTR_ERR(ofid);
                 p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
-                return err;
+                goto out;
         }
 
         gid = v9fs_get_fsgid_for_create(dir);
@@ -345,17 +354,18 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
         }
         mutex_unlock(&v9inode->v_mutex);
         /* Since we are opening a file, assign the open fid to the file */
-        filp = lookup_instantiate_filp(nd, dentry, generic_file_open);
-        if (IS_ERR(filp)) {
-                err = PTR_ERR(filp);
+        err = finish_open(file, dentry, generic_file_open, opened);
+        if (err)
                 goto err_clunk_old_fid;
-        }
-        filp->private_data = ofid;
+        file->private_data = ofid;
 #ifdef CONFIG_9P_FSCACHE
         if (v9ses->cache)
-                v9fs_cache_inode_set_cookie(inode, filp);
+                v9fs_cache_inode_set_cookie(inode, file);
 #endif
-        return 0;
+        *opened |= FILE_CREATED;
+out:
+        dput(res);
+        return err;
 
 error:
         if (fid)
@@ -364,7 +374,7 @@ err_clunk_old_fid:
         if (ofid)
                 p9_client_clunk(ofid);
         v9fs_set_create_acl(NULL, &dacl, &pacl);
-        return err;
+        goto out;
 }
 
 /**
@@ -982,6 +992,7 @@ out:
 
 const struct inode_operations v9fs_dir_inode_operations_dotl = {
         .create = v9fs_vfs_create_dotl,
+        .atomic_open = v9fs_vfs_atomic_open_dotl,
         .lookup = v9fs_vfs_lookup,
         .link = v9fs_vfs_link_dotl,
         .symlink = v9fs_vfs_symlink_dotl,
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 8c92a9ba8330..137d50396898 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -89,7 +89,7 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
         if (v9ses->cache)
                 sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024)/PAGE_CACHE_SIZE;
 
-        sb->s_flags = flags | MS_ACTIVE | MS_DIRSYNC | MS_NOATIME;
+        sb->s_flags |= MS_ACTIVE | MS_DIRSYNC | MS_NOATIME;
         if (!v9ses->cache)
                 sb->s_flags |= MS_SYNCHRONOUS;
 
@@ -137,7 +137,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
                 goto close_session;
         }
 
-        sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
+        sb = sget(fs_type, NULL, v9fs_set_super, flags, v9ses);
         if (IS_ERR(sb)) {
                 retval = PTR_ERR(sb);
                 goto clunk_fid;
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index 3d83075aaa2e..b3be2e7c5643 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -266,7 +266,7 @@ const struct dentry_operations adfs_dentry_operations = {
 };
 
 static struct dentry *
-adfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+adfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         struct inode *inode = NULL;
         struct object_info obj;
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 06fdcc9382c4..bdaec92353c2 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -246,7 +246,6 @@ static struct inode *adfs_alloc_inode(struct super_block *sb)
 static void adfs_i_callback(struct rcu_head *head)
 {
         struct inode *inode = container_of(head, struct inode, i_rcu);
-        INIT_LIST_HEAD(&inode->i_dentry);
         kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
 }
 
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 1fceb320d2f2..6e216419f340 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -3,6 +3,7 @@
 #include <linux/buffer_head.h>
 #include <linux/amigaffs.h>
 #include <linux/mutex.h>
+#include <linux/workqueue.h>
 
 /* AmigaOS allows file names with up to 30 characters length.
  * Names longer than that will be silently truncated. If you
@@ -100,6 +101,10 @@ struct affs_sb_info {
         char *s_prefix;                 /* Prefix for volumes and assigns. */
         char s_volume[32];              /* Volume prefix for absolute symlinks. */
         spinlock_t symlink_lock;        /* protects the previous two */
+        struct super_block *sb;         /* the VFS superblock object */
+        int work_queued;                /* non-zero delayed work is queued */
+        struct delayed_work sb_work;    /* superblock flush delayed work */
+        spinlock_t work_lock;           /* protects sb_work and work_queued */
 };
 
 #define SF_INTL         0x0001          /* International filesystem. */
@@ -120,6 +125,8 @@ static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
         return sb->s_fs_info;
 }
 
+void affs_mark_sb_dirty(struct super_block *sb);
+
 /* amigaffs.c */
 
 extern int      affs_insert_hash(struct inode *inode, struct buffer_head *bh);
@@ -146,9 +153,9 @@ extern void	affs_free_bitmap(struct super_block *sb);
 /* namei.c */
 
 extern int      affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
-extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *);
+extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
 extern int      affs_unlink(struct inode *dir, struct dentry *dentry);
-extern int      affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *);
+extern int      affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
 extern int      affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
 extern int      affs_rmdir(struct inode *dir, struct dentry *dentry);
 extern int      affs_link(struct dentry *olddentry, struct inode *dir,
diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index 52a6407682e6..eb82ee53ee0b 100644
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -122,22 +122,16 @@ affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh)
 }
 
 static void
-affs_fix_dcache(struct dentry *dentry, u32 entry_ino)
+affs_fix_dcache(struct inode *inode, u32 entry_ino)
 {
-        struct inode *inode = dentry->d_inode;
-        void *data = dentry->d_fsdata;
-        struct list_head *head, *next;
-
+        struct dentry *dentry;
+        struct hlist_node *p;
         spin_lock(&inode->i_lock);
-        head = &inode->i_dentry;
-        next = head->next;
-        while (next != head) {
-                dentry = list_entry(next, struct dentry, d_alias);
+        hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                 if (entry_ino == (u32)(long)dentry->d_fsdata) {
-                        dentry->d_fsdata = data;
+                        dentry->d_fsdata = (void *)inode->i_ino;
                         break;
                 }
-                next = next->next;
         }
         spin_unlock(&inode->i_lock);
 }
@@ -177,7 +171,11 @@ affs_remove_link(struct dentry *dentry)
                 }
 
                 affs_lock_dir(dir);
-                affs_fix_dcache(dentry, link_ino);
+                /*
+                 * if there's a dentry for that block, make it
+                 * refer to inode itself.
+                 */
+                affs_fix_dcache(inode, link_ino);
                 retval = affs_remove_hash(dir, link_bh);
                 if (retval) {
                         affs_unlock_dir(dir);
diff --git a/fs/affs/bitmap.c b/fs/affs/bitmap.c
index 3e262711ae06..6e0be43ef6ef 100644
--- a/fs/affs/bitmap.c
+++ b/fs/affs/bitmap.c
@@ -103,7 +103,7 @@ affs_free_block(struct super_block *sb, u32 block)
         *(__be32 *)bh->b_data = cpu_to_be32(tmp - mask);
 
         mark_buffer_dirty(bh);
-        sb->s_dirt = 1;
+        affs_mark_sb_dirty(sb);
         bm->bm_free++;
 
         mutex_unlock(&sbi->s_bmlock);
@@ -248,7 +248,7 @@ find_bit:
         *(__be32 *)bh->b_data = cpu_to_be32(tmp + mask);
 
         mark_buffer_dirty(bh);
-        sb->s_dirt = 1;
+        affs_mark_sb_dirty(sb);
 
         mutex_unlock(&sbi->s_bmlock);
 
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index 47806940aac0..ff65884a7839 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -211,7 +211,7 @@ affs_find_entry(struct inode *dir, struct dentry *dentry)
 }
 
 struct dentry *
-affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         struct super_block *sb = dir->i_sb;
         struct buffer_head *bh;
@@ -255,7 +255,7 @@ affs_unlink(struct inode *dir, struct dentry *dentry)
 }
 
 int
-affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
+affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
 {
         struct super_block *sb = dir->i_sb;
         struct inode    *inode;
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 0782653a05a2..c70f1e5fc024 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -17,6 +17,7 @@
 #include <linux/magic.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/writeback.h>
 #include "affs.h"
 
 extern struct timezone sys_tz;
@@ -25,15 +26,17 @@ static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int affs_remount (struct super_block *sb, int *flags, char *data);
 
 static void
-affs_commit_super(struct super_block *sb, int wait, int clean)
+affs_commit_super(struct super_block *sb, int wait)
 {
         struct affs_sb_info *sbi = AFFS_SB(sb);
         struct buffer_head *bh = sbi->s_root_bh;
         struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
 
-        tail->bm_flag = cpu_to_be32(clean);
+        lock_buffer(bh);
         secs_to_datestamp(get_seconds(), &tail->disk_change);
         affs_fix_checksum(sb, bh);
+        unlock_buffer(bh);
+
         mark_buffer_dirty(bh);
         if (wait)
                 sync_dirty_buffer(bh);
@@ -45,9 +48,7 @@ affs_put_super(struct super_block *sb)
         struct affs_sb_info *sbi = AFFS_SB(sb);
         pr_debug("AFFS: put_super()\n");
 
-        if (!(sb->s_flags & MS_RDONLY) && sb->s_dirt)
-                affs_commit_super(sb, 1, 1);
-
+        cancel_delayed_work_sync(&sbi->sb_work);
         kfree(sbi->s_prefix);
         affs_free_bitmap(sb);
         affs_brelse(sbi->s_root_bh);
@@ -55,26 +56,43 @@ affs_put_super(struct super_block *sb)
         sb->s_fs_info = NULL;
 }
 
-static void
-affs_write_super(struct super_block *sb)
+static int
+affs_sync_fs(struct super_block *sb, int wait)
 {
-        lock_super(sb);
-        if (!(sb->s_flags & MS_RDONLY))
-                affs_commit_super(sb, 1, 2);
-        sb->s_dirt = 0;
-        unlock_super(sb);
+        affs_commit_super(sb, wait);
+        return 0;
+}
+
+static void flush_superblock(struct work_struct *work)
+{
+        struct affs_sb_info *sbi;
+        struct super_block *sb;
+
+        sbi = container_of(work, struct affs_sb_info, sb_work.work);
+        sb = sbi->sb;
 
-        pr_debug("AFFS: write_super() at %lu, clean=2\n", get_seconds());
+        spin_lock(&sbi->work_lock);
+        sbi->work_queued = 0;
+        spin_unlock(&sbi->work_lock);
+
+        affs_commit_super(sb, 1);
 }
 
-static int
-affs_sync_fs(struct super_block *sb, int wait)
+void affs_mark_sb_dirty(struct super_block *sb)
 {
-        lock_super(sb);
-        affs_commit_super(sb, wait, 2);
-        sb->s_dirt = 0;
-        unlock_super(sb);
-        return 0;
+        struct affs_sb_info *sbi = AFFS_SB(sb);
+        unsigned long delay;
+
+        if (sb->s_flags & MS_RDONLY)
+               return;
+
+        spin_lock(&sbi->work_lock);
+        if (!sbi->work_queued) {
+               delay = msecs_to_jiffies(dirty_writeback_interval * 10);
+               queue_delayed_work(system_long_wq, &sbi->sb_work, delay);
+               sbi->work_queued = 1;
+        }
+        spin_unlock(&sbi->work_lock);
 }
 
 static struct kmem_cache * affs_inode_cachep;
@@ -138,7 +156,6 @@ static const struct super_operations affs_sops = {
         .write_inode    = affs_write_inode,
         .evict_inode    = affs_evict_inode,
         .put_super      = affs_put_super,
-        .write_super    = affs_write_super,
         .sync_fs        = affs_sync_fs,
         .statfs         = affs_statfs,
         .remount_fs     = affs_remount,
@@ -305,8 +322,11 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
                 return -ENOMEM;
 
         sb->s_fs_info = sbi;
+        sbi->sb = sb;
         mutex_init(&sbi->s_bmlock);
         spin_lock_init(&sbi->symlink_lock);
+        spin_lock_init(&sbi->work_lock);
+        INIT_DELAYED_WORK(&sbi->sb_work, flush_superblock);
 
         if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
                                 &blocksize,&sbi->s_prefix,
@@ -531,6 +551,7 @@ affs_remount(struct super_block *sb, int *flags, char *data)
                 return -EINVAL;
         }
 
+        flush_delayed_work_sync(&sbi->sb_work);
         replace_mount_options(sb, new_opts);
 
         sbi->s_flags = mount_flags;
@@ -549,10 +570,9 @@ affs_remount(struct super_block *sb, int *flags, char *data)
         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
                 return 0;
 
-        if (*flags & MS_RDONLY) {
-                affs_write_super(sb);
+        if (*flags & MS_RDONLY)
                 affs_free_bitmap(sb);
-        } else
+        else
                 res = affs_init_bitmap(sb, flags);
 
         return res;
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index e22dc4b4a503..db477906ba4f 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -20,16 +20,16 @@
 #include "internal.h"
 
 static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
-                                 struct nameidata *nd);
+                                 unsigned int flags);
 static int afs_dir_open(struct inode *inode, struct file *file);
 static int afs_readdir(struct file *file, void *dirent, filldir_t filldir);
-static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd);
+static int afs_d_revalidate(struct dentry *dentry, unsigned int flags);
 static int afs_d_delete(const struct dentry *dentry);
 static void afs_d_release(struct dentry *dentry);
 static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
                                   loff_t fpos, u64 ino, unsigned dtype);
 static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                      struct nameidata *nd);
+                      bool excl);
 static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
 static int afs_rmdir(struct inode *dir, struct dentry *dentry);
 static int afs_unlink(struct inode *dir, struct dentry *dentry);
@@ -516,7 +516,7 @@ out:
  * look up an entry in a directory
  */
 static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
-                                 struct nameidata *nd)
+                                 unsigned int flags)
 {
         struct afs_vnode *vnode;
         struct afs_fid fid;
@@ -598,7 +598,7 @@ success:
  * - NOTE! the hit can be a negative hit too, so we can't assume we have an
  *   inode
  */
-static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct afs_vnode *vnode, *dir;
         struct afs_fid uninitialized_var(fid);
@@ -607,7 +607,7 @@ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
         void *dir_version;
         int ret;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         vnode = AFS_FS_I(dentry->d_inode);
@@ -949,7 +949,7 @@ error:
  * create a regular file on an AFS filesystem
  */
 static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                      struct nameidata *nd)
+                      bool excl)
 {
         struct afs_file_status status;
         struct afs_callback cb;
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index 298cf8919ec7..9682c33d5daf 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -22,7 +22,7 @@
 
 static struct dentry *afs_mntpt_lookup(struct inode *dir,
                                        struct dentry *dentry,
-                                       struct nameidata *nd);
+                                       unsigned int flags);
 static int afs_mntpt_open(struct inode *inode, struct file *file);
 static void afs_mntpt_expiry_timed_out(struct work_struct *work);
 
@@ -104,7 +104,7 @@ out:
  */
 static struct dentry *afs_mntpt_lookup(struct inode *dir,
                                        struct dentry *dentry,
-                                       struct nameidata *nd)
+                                       unsigned int flags)
 {
         _enter("%p,%p{%p{%s},%s}",
                dir,
diff --git a/fs/afs/super.c b/fs/afs/super.c
index f02b31e7e648..df8c6047c2a1 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -395,7 +395,7 @@ static struct dentry *afs_mount(struct file_system_type *fs_type,
         as->volume = vol;
 
         /* allocate a deviceless superblock */
-        sb = sget(fs_type, afs_test_super, afs_set_super, as);
+        sb = sget(fs_type, afs_test_super, afs_set_super, flags, as);
         if (IS_ERR(sb)) {
                 ret = PTR_ERR(sb);
                 afs_put_volume(vol);
@@ -406,7 +406,6 @@ static struct dentry *afs_mount(struct file_system_type *fs_type,
         if (!sb->s_root) {
                 /* initial superblock/root creation */
                 _debug("create");
-                sb->s_flags = flags;
                 ret = afs_fill_super(sb, &params);
                 if (ret < 0) {
                         deactivate_locked_super(sb);
diff --git a/fs/aio.c b/fs/aio.c
index 55c4c7656053..71f613cf4a85 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -56,13 +56,6 @@ static struct kmem_cache	*kioctx_cachep;
 
 static struct workqueue_struct *aio_wq;
 
-/* Used for rare fput completion. */
-static void aio_fput_routine(struct work_struct *);
-static DECLARE_WORK(fput_work, aio_fput_routine);
-
-static DEFINE_SPINLOCK(fput_lock);
-static LIST_HEAD(fput_head);
-
 static void aio_kick_handler(struct work_struct *);
 static void aio_queue_work(struct kioctx *);
 
@@ -479,7 +472,6 @@ static int kiocb_batch_refill(struct kioctx *ctx, struct kiocb_batch *batch)
 {
         unsigned short allocated, to_alloc;
         long avail;
-        bool called_fput = false;
         struct kiocb *req, *n;
         struct aio_ring *ring;
 
@@ -495,28 +487,11 @@ static int kiocb_batch_refill(struct kioctx *ctx, struct kiocb_batch *batch)
         if (allocated == 0)
                 goto out;
 
-retry:
         spin_lock_irq(&ctx->ctx_lock);
         ring = kmap_atomic(ctx->ring_info.ring_pages[0]);
 
         avail = aio_ring_avail(&ctx->ring_info, ring) - ctx->reqs_active;
         BUG_ON(avail < 0);
-        if (avail == 0 && !called_fput) {
-                /*
-                 * Handle a potential starvation case.  It is possible that
-                 * we hold the last reference on a struct file, causing us
-                 * to delay the final fput to non-irq context.  In this case,
-                 * ctx->reqs_active is artificially high.  Calling the fput
-                 * routine here may free up a slot in the event completion
-                 * ring, allowing this allocation to succeed.
-                 */
-                kunmap_atomic(ring);
-                spin_unlock_irq(&ctx->ctx_lock);
-                aio_fput_routine(NULL);
-                called_fput = true;
-                goto retry;
-        }
-
         if (avail < allocated) {
                 /* Trim back the number of requests. */
                 list_for_each_entry_safe(req, n, &batch->head, ki_batch) {
@@ -570,36 +545,6 @@ static inline void really_put_req(struct kioctx *ctx, struct kiocb *req)
                 wake_up_all(&ctx->wait);
 }
 
-static void aio_fput_routine(struct work_struct *data)
-{
-        spin_lock_irq(&fput_lock);
-        while (likely(!list_empty(&fput_head))) {
-                struct kiocb *req = list_kiocb(fput_head.next);
-                struct kioctx *ctx = req->ki_ctx;
-
-                list_del(&req->ki_list);
-                spin_unlock_irq(&fput_lock);
-
-                /* Complete the fput(s) */
-                if (req->ki_filp != NULL)
-                        fput(req->ki_filp);
-
-                /* Link the iocb into the context's free list */
-                rcu_read_lock();
-                spin_lock_irq(&ctx->ctx_lock);
-                really_put_req(ctx, req);
-                /*
-                 * at that point ctx might've been killed, but actual
-                 * freeing is RCU'd
-                 */
-                spin_unlock_irq(&ctx->ctx_lock);
-                rcu_read_unlock();
-
-                spin_lock_irq(&fput_lock);
-        }
-        spin_unlock_irq(&fput_lock);
-}
-
 /* __aio_put_req
  *      Returns true if this put was the last user of the request.
  */
@@ -618,21 +563,9 @@ static int __aio_put_req(struct kioctx *ctx, struct kiocb *req)
         req->ki_cancel = NULL;
         req->ki_retry = NULL;
 
-        /*
-         * Try to optimize the aio and eventfd file* puts, by avoiding to
-         * schedule work in case it is not final fput() time. In normal cases,
-         * we would not be holding the last reference to the file*, so
-         * this function will be executed w/out any aio kthread wakeup.
-         */
-        if (unlikely(!fput_atomic(req->ki_filp))) {
-                spin_lock(&fput_lock);
-                list_add(&req->ki_list, &fput_head);
-                spin_unlock(&fput_lock);
-                schedule_work(&fput_work);
-        } else {
-                req->ki_filp = NULL;
-                really_put_req(ctx, req);
-        }
+        fput(req->ki_filp);
+        req->ki_filp = NULL;
+        really_put_req(ctx, req);
         return 1;
 }
 
diff --git a/fs/attr.c b/fs/attr.c
index 0da90951d277..29e38a1f7f77 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -171,6 +171,8 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
         struct timespec now;
         unsigned int ia_valid = attr->ia_valid;
 
+        WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
+
         if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) {
                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
                         return -EPERM;
@@ -250,5 +252,4 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
 
         return error;
 }
-
 EXPORT_SYMBOL(notify_change);
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index aa9103f8f01b..abf645c1703b 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -257,8 +257,8 @@ static int autofs_dev_ioctl_open_mountpoint(const char *name, dev_t devid)
                  * corresponding to the autofs fs we want to open.
                  */
 
-                filp = dentry_open(path.dentry, path.mnt, O_RDONLY,
-                                   current_cred());
+                filp = dentry_open(&path, O_RDONLY, current_cred());
+                path_put(&path);
                 if (IS_ERR(filp)) {
                         err = PTR_ERR(filp);
                         goto out;
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 75e5f1c8e028..e7396cfdb109 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -32,7 +32,7 @@ static long autofs4_root_ioctl(struct file *,unsigned int,unsigned long);
 static long autofs4_root_compat_ioctl(struct file *,unsigned int,unsigned long);
 #endif
 static int autofs4_dir_open(struct inode *inode, struct file *file);
-static struct dentry *autofs4_lookup(struct inode *,struct dentry *, struct nameidata *);
+static struct dentry *autofs4_lookup(struct inode *,struct dentry *, unsigned int);
 static struct vfsmount *autofs4_d_automount(struct path *);
 static int autofs4_d_manage(struct dentry *, bool);
 static void autofs4_dentry_release(struct dentry *);
@@ -458,7 +458,7 @@ int autofs4_d_manage(struct dentry *dentry, bool rcu_walk)
 }
 
 /* Lookups in the root directory */
-static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         struct autofs_sb_info *sbi;
         struct autofs_info *ino;
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 1b35d6bd06b0..b1342ffb3cf6 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -173,13 +173,13 @@ static const struct file_operations bad_file_ops =
 };
 
 static int bad_inode_create (struct inode *dir, struct dentry *dentry,
-                umode_t mode, struct nameidata *nd)
+                umode_t mode, bool excl)
 {
         return -EIO;
 }
 
 static struct dentry *bad_inode_lookup(struct inode *dir,
-                        struct dentry *dentry, struct nameidata *nd)
+                        struct dentry *dentry, unsigned int flags)
 {
         return ERR_PTR(-EIO);
 }
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index e18da23d42b5..cf7f3c67c8b7 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -34,7 +34,7 @@ static int befs_readdir(struct file *, void *, filldir_t);
 static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int);
 static int befs_readpage(struct file *file, struct page *page);
 static sector_t befs_bmap(struct address_space *mapping, sector_t block);
-static struct dentry *befs_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *befs_lookup(struct inode *, struct dentry *, unsigned int);
 static struct inode *befs_iget(struct super_block *, unsigned long);
 static struct inode *befs_alloc_inode(struct super_block *sb);
 static void befs_destroy_inode(struct inode *inode);
@@ -159,7 +159,7 @@ befs_get_block(struct inode *inode, sector_t block,
 }
 
 static struct dentry *
-befs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         struct inode *inode = NULL;
         struct super_block *sb = dir->i_sb;
diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index d12c7966db27..2785ef91191a 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -85,7 +85,7 @@ const struct file_operations bfs_dir_operations = {
 extern void dump_imap(const char *, struct super_block *);
 
 static int bfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                                                struct nameidata *nd)
+                                                bool excl)
 {
         int err;
         struct inode *inode;
@@ -133,7 +133,7 @@ static int bfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 }
 
 static struct dentry *bfs_lookup(struct inode *dir, struct dentry *dentry,
-                                                struct nameidata *nd)
+                                                unsigned int flags)
 {
         struct inode *inode = NULL;
         struct buffer_head *bh;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index c2bbe1fb1326..1e519195d45b 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1710,3 +1710,39 @@ int __invalidate_device(struct block_device *bdev, bool kill_dirty)
         return res;
 }
 EXPORT_SYMBOL(__invalidate_device);
+
+void iterate_bdevs(void (*func)(struct block_device *, void *), void *arg)
+{
+        struct inode *inode, *old_inode = NULL;
+
+        spin_lock(&inode_sb_list_lock);
+        list_for_each_entry(inode, &blockdev_superblock->s_inodes, i_sb_list) {
+                struct address_space *mapping = inode->i_mapping;
+
+                spin_lock(&inode->i_lock);
+                if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW) ||
+                    mapping->nrpages == 0) {
+                        spin_unlock(&inode->i_lock);
+                        continue;
+                }
+                __iget(inode);
+                spin_unlock(&inode->i_lock);
+                spin_unlock(&inode_sb_list_lock);
+                /*
+                 * We hold a reference to 'inode' so it couldn't have been
+                 * removed from s_inodes list while we dropped the
+                 * inode_sb_list_lock.  We cannot iput the inode now as we can
+                 * be holding the last reference and we cannot iput it under
+                 * inode_sb_list_lock. So we keep the reference and iput it
+                 * later.
+                 */
+                iput(old_inode);
+                old_inode = inode;
+
+                func(I_BDEV(inode), arg);
+
+                spin_lock(&inode_sb_list_lock);
+        }
+        spin_unlock(&inode_sb_list_lock);
+        iput(old_inode);
+}
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a7d1921ac76b..fb8d671d00e6 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4247,7 +4247,7 @@ static void btrfs_dentry_release(struct dentry *dentry)
 }
 
 static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
-                                   struct nameidata *nd)
+                                   unsigned int flags)
 {
         struct dentry *ret;
 
@@ -4893,7 +4893,7 @@ out_unlock:
 }
 
 static int btrfs_create(struct inode *dir, struct dentry *dentry,
-                        umode_t mode, struct nameidata *nd)
+                        umode_t mode, bool excl)
 {
         struct btrfs_trans_handle *trans;
         struct btrfs_root *root = BTRFS_I(dir)->root;
@@ -6987,7 +6987,7 @@ void btrfs_destroy_inode(struct inode *inode)
         struct btrfs_ordered_extent *ordered;
         struct btrfs_root *root = BTRFS_I(inode)->root;
 
-        WARN_ON(!list_empty(&inode->i_dentry));
+        WARN_ON(!hlist_empty(&inode->i_dentry));
         WARN_ON(inode->i_data.nrpages);
         WARN_ON(BTRFS_I(inode)->outstanding_extents);
         WARN_ON(BTRFS_I(inode)->reserved_extents);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 0e92e5763005..1e9f6c019ad0 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3268,7 +3268,7 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg)
         if (fs_info->sb->s_flags & MS_RDONLY)
                 return -EROFS;
 
-        ret = mnt_want_write(file->f_path.mnt);
+        ret = mnt_want_write_file(file);
         if (ret)
                 return ret;
 
@@ -3338,7 +3338,7 @@ out_bargs:
 out:
         mutex_unlock(&fs_info->balance_mutex);
         mutex_unlock(&fs_info->volume_mutex);
-        mnt_drop_write(file->f_path.mnt);
+        mnt_drop_write_file(file);
         return ret;
 }
 
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index e23991574fdf..b19d75567728 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1068,7 +1068,8 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
         }
 
         bdev = fs_devices->latest_bdev;
-        s = sget(fs_type, btrfs_test_super, btrfs_set_super, fs_info);
+        s = sget(fs_type, btrfs_test_super, btrfs_set_super, flags | MS_NOSEC,
+                 fs_info);
         if (IS_ERR(s)) {
                 error = PTR_ERR(s);
                 goto error_close_devices;
@@ -1082,7 +1083,6 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
         } else {
                 char b[BDEVNAME_SIZE];
 
-                s->s_flags = flags | MS_NOSEC;
                 strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
                 btrfs_sb(s)->bdev_holder = fs_type;
                 error = btrfs_fill_super(s, fs_devices, data,
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 7f0771d3894e..b0b5f7cdfffa 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -567,7 +567,7 @@ lookup_again:
                         if (ret < 0)
                                 goto create_error;
                         start = jiffies;
-                        ret = vfs_create(dir->d_inode, next, S_IFREG, NULL);
+                        ret = vfs_create(dir->d_inode, next, S_IFREG, true);
                         cachefiles_hist(cachefiles_create_histogram, start);
                         if (ret < 0)
                                 goto create_error;
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 0e3c0924cc3a..c0353dfac51f 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -891,6 +891,7 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
         struct cachefiles_cache *cache;
         mm_segment_t old_fs;
         struct file *file;
+        struct path path;
         loff_t pos, eof;
         size_t len;
         void *data;
@@ -916,10 +917,9 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
 
         /* write the page to the backing filesystem and let it store it in its
          * own time */
-        dget(object->backer);
-        mntget(cache->mnt);
-        file = dentry_open(object->backer, cache->mnt, O_RDWR,
-                           cache->cache_cred);
+        path.mnt = cache->mnt;
+        path.dentry = object->backer;
+        file = dentry_open(&path, O_RDWR, cache->cache_cred);
         if (IS_ERR(file)) {
                 ret = PTR_ERR(file);
         } else {
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 3e8094be4604..00894ff9246c 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -576,7 +576,7 @@ static int is_root_ceph_dentry(struct inode *inode, struct dentry *dentry)
  * the MDS so that it gets our 'caps wanted' value in a single op.
  */
 static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
-                                  struct nameidata *nd)
+                                  unsigned int flags)
 {
         struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
         struct ceph_mds_client *mdsc = fsc->mdsc;
@@ -594,14 +594,6 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
         if (err < 0)
                 return ERR_PTR(err);
 
-        /* open (but not create!) intent? */
-        if (nd &&
-            (nd->flags & LOOKUP_OPEN) &&
-            !(nd->intent.open.flags & O_CREAT)) {
-                int mode = nd->intent.open.create_mode & ~current->fs->umask;
-                return ceph_lookup_open(dir, dentry, nd, mode, 1);
-        }
-
         /* can we conclude ENOENT locally? */
         if (dentry->d_inode == NULL) {
                 struct ceph_inode_info *ci = ceph_inode(dir);
@@ -642,13 +634,51 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
         return dentry;
 }
 
+int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
+                     struct file *file, unsigned flags, umode_t mode,
+                     int *opened)
+{
+        int err;
+        struct dentry *res = NULL;
+
+        if (!(flags & O_CREAT)) {
+                if (dentry->d_name.len > NAME_MAX)
+                        return -ENAMETOOLONG;
+
+                err = ceph_init_dentry(dentry);
+                if (err < 0)
+                        return err;
+
+                return ceph_lookup_open(dir, dentry, file, flags, mode, opened);
+        }
+
+        if (d_unhashed(dentry)) {
+                res = ceph_lookup(dir, dentry, 0);
+                if (IS_ERR(res))
+                        return PTR_ERR(res);
+
+                if (res)
+                        dentry = res;
+        }
+
+        /* We don't deal with positive dentries here */
+        if (dentry->d_inode)
+                return finish_no_open(file, res);
+
+        *opened |= FILE_CREATED;
+        err = ceph_lookup_open(dir, dentry, file, flags, mode, opened);
+        dput(res);
+
+        return err;
+}
+
 /*
  * If we do a create but get no trace back from the MDS, follow up with
  * a lookup (the VFS expects us to link up the provided dentry).
  */
 int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry)
 {
-        struct dentry *result = ceph_lookup(dir, dentry, NULL);
+        struct dentry *result = ceph_lookup(dir, dentry, 0);
 
         if (result && !IS_ERR(result)) {
                 /*
@@ -700,25 +730,9 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry,
 }
 
 static int ceph_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                       struct nameidata *nd)
+                       bool excl)
 {
-        dout("create in dir %p dentry %p name '%.*s'\n",
-             dir, dentry, dentry->d_name.len, dentry->d_name.name);
-
-        if (ceph_snap(dir) != CEPH_NOSNAP)
-                return -EROFS;
-
-        if (nd) {
-                BUG_ON((nd->flags & LOOKUP_OPEN) == 0);
-                dentry = ceph_lookup_open(dir, dentry, nd, mode, 0);
-                /* hrm, what should i do here if we get aliased? */
-                if (IS_ERR(dentry))
-                        return PTR_ERR(dentry);
-                return 0;
-        }
-
-        /* fall back to mknod */
-        return ceph_mknod(dir, dentry, (mode & ~S_IFMT) | S_IFREG, 0);
+        return ceph_mknod(dir, dentry, mode, 0);
 }
 
 static int ceph_symlink(struct inode *dir, struct dentry *dentry,
@@ -1028,12 +1042,12 @@ static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
 /*
  * Check if cached dentry can be trusted.
  */
-static int ceph_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
 {
         int valid = 0;
         struct inode *dir;
 
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         dout("d_revalidate %p '%.*s' inode %p offset %lld\n", dentry,
@@ -1080,7 +1094,7 @@ static void ceph_d_release(struct dentry *dentry)
 }
 
 static int ceph_snapdir_d_revalidate(struct dentry *dentry,
-                                          struct nameidata *nd)
+                                          unsigned int flags)
 {
         /*
          * Eventually, we'll want to revalidate snapped metadata
@@ -1357,6 +1371,7 @@ const struct inode_operations ceph_dir_iops = {
         .rmdir = ceph_unlink,
         .rename = ceph_rename,
         .create = ceph_create,
+        .atomic_open = ceph_atomic_open,
 };
 
 const struct dentry_operations ceph_dentry_ops = {
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 988d4f302e48..1b81d6c31878 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -213,22 +213,15 @@ out:
  * may_open() fails, the struct *file gets cleaned up (i.e.
  * ceph_release gets called).  So fear not!
  */
-/*
- * flags
- *  path_lookup_open   -> LOOKUP_OPEN
- *  path_lookup_create -> LOOKUP_OPEN|LOOKUP_CREATE
- */
-struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
-                                struct nameidata *nd, int mode,
-                                int locked_dir)
+int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+                     struct file *file, unsigned flags, umode_t mode,
+                     int *opened)
 {
         struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
         struct ceph_mds_client *mdsc = fsc->mdsc;
-        struct file *file;
         struct ceph_mds_request *req;
         struct dentry *ret;
         int err;
-        int flags = nd->intent.open.flags;
 
         dout("ceph_lookup_open dentry %p '%.*s' flags %d mode 0%o\n",
              dentry, dentry->d_name.len, dentry->d_name.name, flags, mode);
@@ -236,7 +229,7 @@ struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
         /* do the open */
         req = prepare_open_request(dir->i_sb, flags, mode);
         if (IS_ERR(req))
-                return ERR_CAST(req);
+                return PTR_ERR(req);
         req->r_dentry = dget(dentry);
         req->r_num_caps = 2;
         if (flags & O_CREAT) {
@@ -254,14 +247,17 @@ struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
                 err = ceph_handle_notrace_create(dir, dentry);
         if (err)
                 goto out;
-        file = lookup_instantiate_filp(nd, req->r_dentry, ceph_open);
-        if (IS_ERR(file))
-                err = PTR_ERR(file);
+        err = finish_open(file, req->r_dentry, ceph_open, opened);
 out:
         ret = ceph_finish_lookup(req, dentry, err);
         ceph_mdsc_put_request(req);
         dout("ceph_lookup_open result=%p\n", ret);
-        return ret;
+
+        if (IS_ERR(ret))
+                return PTR_ERR(ret);
+
+        dput(ret);
+        return err;
 }
 
 int ceph_release(struct inode *inode, struct file *file)
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 1e67dd7305a4..7076109f014d 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -871,7 +871,7 @@ static struct dentry *ceph_mount(struct file_system_type *fs_type,
 
         if (ceph_test_opt(fsc->client, NOSHARE))
                 compare_super = NULL;
-        sb = sget(fs_type, compare_super, ceph_set_super, fsc);
+        sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc);
         if (IS_ERR(sb)) {
                 res = ERR_CAST(sb);
                 goto out;
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index fc35036d258d..f4d5522cb619 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -806,9 +806,9 @@ extern int ceph_copy_from_page_vector(struct page **pages,
                                     loff_t off, size_t len);
 extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
 extern int ceph_open(struct inode *inode, struct file *file);
-extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
-                                       struct nameidata *nd, int mode,
-                                       int locked_dir);
+extern int ceph_lookup_open(struct inode *dir, struct dentry *dentry,
+                             struct file *od, unsigned flags,
+                             umode_t mode, int *opened);
 extern int ceph_release(struct inode *inode, struct file *filp);
 
 /* dir.c */
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 8b6e344eb0ba..a7610cfedf0a 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -257,7 +257,6 @@ cifs_alloc_inode(struct super_block *sb)
 static void cifs_i_callback(struct rcu_head *head)
 {
         struct inode *inode = container_of(head, struct inode, i_rcu);
-        INIT_LIST_HEAD(&inode->i_dentry);
         kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
 }
 
@@ -638,7 +637,10 @@ cifs_do_mount(struct file_system_type *fs_type,
         mnt_data.cifs_sb = cifs_sb;
         mnt_data.flags = flags;
 
-        sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
+        /* BB should we make this contingent on mount parm? */
+        flags |= MS_NODIRATIME | MS_NOATIME;
+
+        sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
         if (IS_ERR(sb)) {
                 root = ERR_CAST(sb);
                 cifs_umount(cifs_sb);
@@ -649,10 +651,6 @@ cifs_do_mount(struct file_system_type *fs_type,
                 cFYI(1, "Use existing superblock");
                 cifs_umount(cifs_sb);
         } else {
-                sb->s_flags = flags;
-                /* BB should we make this contingent on mount parm? */
-                sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
-
                 rc = cifs_read_super(sb);
                 if (rc) {
                         root = ERR_PTR(rc);
@@ -778,6 +776,7 @@ struct file_system_type cifs_fs_type = {
 };
 const struct inode_operations cifs_dir_inode_ops = {
         .create = cifs_create,
+        .atomic_open = cifs_atomic_open,
         .lookup = cifs_lookup,
         .getattr = cifs_getattr,
         .unlink = cifs_unlink,
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 65365358c976..1c49c5a9b27a 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -45,9 +45,12 @@ extern const struct address_space_operations cifs_addr_ops_smallbuf;
 extern const struct inode_operations cifs_dir_inode_ops;
 extern struct inode *cifs_root_iget(struct super_block *);
 extern int cifs_create(struct inode *, struct dentry *, umode_t,
-                       struct nameidata *);
+                       bool excl);
+extern int cifs_atomic_open(struct inode *, struct dentry *,
+                            struct file *, unsigned, umode_t,
+                            int *);
 extern struct dentry *cifs_lookup(struct inode *, struct dentry *,
-                                  struct nameidata *);
+                                  unsigned int);
 extern int cifs_unlink(struct inode *dir, struct dentry *dentry);
 extern int cifs_hardlink(struct dentry *, struct inode *, struct dentry *);
 extern int cifs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index ec4e9a2a12f8..a180265a10b5 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -133,108 +133,141 @@ cifs_bp_rename_retry:
         return full_path;
 }
 
+/*
+ * Don't allow the separator character in a path component.
+ * The VFS will not allow "/", but "\" is allowed by posix.
+ */
+static int
+check_name(struct dentry *direntry)
+{
+        struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+        int i;
+
+        if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
+                for (i = 0; i < direntry->d_name.len; i++) {
+                        if (direntry->d_name.name[i] == '\\') {
+                                cFYI(1, "Invalid file name");
+                                return -EINVAL;
+                        }
+                }
+        }
+        return 0;
+}
+
+
 /* Inode operations in similar order to how they appear in Linux file fs.h */
 
-int
-cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
-                struct nameidata *nd)
+static int cifs_do_create(struct inode *inode, struct dentry *direntry,
+                          int xid, struct tcon_link *tlink, unsigned oflags,
+                          umode_t mode, __u32 *oplock, __u16 *fileHandle,
+                          int *created)
 {
         int rc = -ENOENT;
-        int xid;
         int create_options = CREATE_NOT_DIR;
-        __u32 oplock = 0;
-        int oflags;
-        /*
-         * BB below access is probably too much for mknod to request
-         *    but we have to do query and setpathinfo so requesting
-         *    less could fail (unless we want to request getatr and setatr
-         *    permissions (only).  At least for POSIX we do not have to
-         *    request so much.
-         */
-        int desiredAccess = GENERIC_READ | GENERIC_WRITE;
-        __u16 fileHandle;
-        struct cifs_sb_info *cifs_sb;
-        struct tcon_link *tlink;
-        struct cifs_tcon *tcon;
+        int desiredAccess;
+        struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+        struct cifs_tcon *tcon = tlink_tcon(tlink);
         char *full_path = NULL;
         FILE_ALL_INFO *buf = NULL;
         struct inode *newinode = NULL;
-        int disposition = FILE_OVERWRITE_IF;
-
-        xid = GetXid();
-
-        cifs_sb = CIFS_SB(inode->i_sb);
-        tlink = cifs_sb_tlink(cifs_sb);
-        if (IS_ERR(tlink)) {
-                FreeXid(xid);
-                return PTR_ERR(tlink);
-        }
-        tcon = tlink_tcon(tlink);
+        int disposition;
 
+        *oplock = 0;
         if (tcon->ses->server->oplocks)
-                oplock = REQ_OPLOCK;
-
-        if (nd)
-                oflags = nd->intent.open.file->f_flags;
-        else
-                oflags = O_RDONLY | O_CREAT;
+                *oplock = REQ_OPLOCK;
 
         full_path = build_path_from_dentry(direntry);
         if (full_path == NULL) {
                 rc = -ENOMEM;
-                goto cifs_create_out;
+                goto out;
         }
 
         if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) &&
+            !tcon->broken_posix_open &&
             (CIFS_UNIX_POSIX_PATH_OPS_CAP &
                         le64_to_cpu(tcon->fsUnixInfo.Capability))) {
                 rc = cifs_posix_open(full_path, &newinode,
-                        inode->i_sb, mode, oflags, &oplock, &fileHandle, xid);
-                /* EIO could indicate that (posix open) operation is not
-                   supported, despite what server claimed in capability
-                   negotiation.  EREMOTE indicates DFS junction, which is not
-                   handled in posix open */
-
-                if (rc == 0) {
-                        if (newinode == NULL) /* query inode info */
+                        inode->i_sb, mode, oflags, oplock, fileHandle, xid);
+                switch (rc) {
+                case 0:
+                        if (newinode == NULL) {
+                                /* query inode info */
                                 goto cifs_create_get_file_info;
-                        else /* success, no need to query */
-                                goto cifs_create_set_dentry;
-                } else if ((rc != -EIO) && (rc != -EREMOTE) &&
-                         (rc != -EOPNOTSUPP) && (rc != -EINVAL))
-                        goto cifs_create_out;
-                /* else fallthrough to retry, using older open call, this is
-                   case where server does not support this SMB level, and
-                   falsely claims capability (also get here for DFS case
-                   which should be rare for path not covered on files) */
-        }
+                        }
+
+                        if (!S_ISREG(newinode->i_mode)) {
+                                /*
+                                 * The server may allow us to open things like
+                                 * FIFOs, but the client isn't set up to deal
+                                 * with that. If it's not a regular file, just
+                                 * close it and proceed as if it were a normal
+                                 * lookup.
+                                 */
+                                CIFSSMBClose(xid, tcon, *fileHandle);
+                                goto cifs_create_get_file_info;
+                        }
+                        /* success, no need to query */
+                        goto cifs_create_set_dentry;
+
+                case -ENOENT:
+                        goto cifs_create_get_file_info;
+
+                case -EIO:
+                case -EINVAL:
+                        /*
+                         * EIO could indicate that (posix open) operation is not
+                         * supported, despite what server claimed in capability
+                         * negotiation.
+                         *
+                         * POSIX open in samba versions 3.3.1 and earlier could
+                         * incorrectly fail with invalid parameter.
+                         */
+                        tcon->broken_posix_open = true;
+                        break;
+
+                case -EREMOTE:
+                case -EOPNOTSUPP:
+                        /*
+                         * EREMOTE indicates DFS junction, which is not handled
+                         * in posix open.  If either that or op not supported
+                         * returned, follow the normal lookup.
+                         */
+                        break;
 
-        if (nd) {
-                /* if the file is going to stay open, then we
-                   need to set the desired access properly */
-                desiredAccess = 0;
-                if (OPEN_FMODE(oflags) & FMODE_READ)
-                        desiredAccess |= GENERIC_READ; /* is this too little? */
-                if (OPEN_FMODE(oflags) & FMODE_WRITE)
-                        desiredAccess |= GENERIC_WRITE;
-
-                if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
-                        disposition = FILE_CREATE;
-                else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
-                        disposition = FILE_OVERWRITE_IF;
-                else if ((oflags & O_CREAT) == O_CREAT)
-                        disposition = FILE_OPEN_IF;
-                else
-                        cFYI(1, "Create flag not set in create function");
+                default:
+                        goto out;
+                }
+                /*
+                 * fallthrough to retry, using older open call, this is case
+                 * where server does not support this SMB level, and falsely
+                 * claims capability (also get here for DFS case which should be
+                 * rare for path not covered on files)
+                 */
         }
 
+        desiredAccess = 0;
+        if (OPEN_FMODE(oflags) & FMODE_READ)
+                desiredAccess |= GENERIC_READ; /* is this too little? */
+        if (OPEN_FMODE(oflags) & FMODE_WRITE)
+                desiredAccess |= GENERIC_WRITE;
+
+        disposition = FILE_OVERWRITE_IF;
+        if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+                disposition = FILE_CREATE;
+        else if ((oflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
+                disposition = FILE_OVERWRITE_IF;
+        else if ((oflags & O_CREAT) == O_CREAT)
+                disposition = FILE_OPEN_IF;
+        else
+                cFYI(1, "Create flag not set in create function");
+
         /* BB add processing to set equivalent of mode - e.g. via CreateX with
            ACLs */
 
         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
         if (buf == NULL) {
                 rc = -ENOMEM;
-                goto cifs_create_out;
+                goto out;
         }
 
         /*
@@ -250,7 +283,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
         if (tcon->ses->capabilities & CAP_NT_SMBS)
                 rc = CIFSSMBOpen(xid, tcon, full_path, disposition,
                          desiredAccess, create_options,
-                         &fileHandle, &oplock, buf, cifs_sb->local_nls,
+                         fileHandle, oplock, buf, cifs_sb->local_nls,
                          cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
         else
                 rc = -EIO; /* no NT SMB support fall into legacy open below */
@@ -259,17 +292,17 @@ cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
                 /* old server, retry the open legacy style */
                 rc = SMBLegacyOpen(xid, tcon, full_path, disposition,
                         desiredAccess, create_options,
-                        &fileHandle, &oplock, buf, cifs_sb->local_nls,
+                        fileHandle, oplock, buf, cifs_sb->local_nls,
                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
         }
         if (rc) {
                 cFYI(1, "cifs_create returned 0x%x", rc);
-                goto cifs_create_out;
+                goto out;
         }
 
         /* If Open reported that we actually created a file
            then we now have to set the mode if possible */
-        if ((tcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) {
+        if ((tcon->unix_ext) && (*oplock & CIFS_CREATE_ACTION)) {
                 struct cifs_unix_set_info_args args = {
                                 .mode   = mode,
                                 .ctime  = NO_CHANGE_64,
@@ -278,6 +311,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
                                 .device = 0,
                 };
 
+                *created |= FILE_CREATED;
                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
                         args.uid = (__u64) current_fsuid();
                         if (inode->i_mode & S_ISGID)
@@ -288,7 +322,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
                         args.uid = NO_CHANGE_64;
                         args.gid = NO_CHANGE_64;
                 }
-                CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle,
+                CIFSSMBUnixSetFileInfo(xid, tcon, &args, *fileHandle,
                                         current->tgid);
         } else {
                 /* BB implement mode setting via Windows security
@@ -305,11 +339,11 @@ cifs_create_get_file_info:
                                               inode->i_sb, xid);
         else {
                 rc = cifs_get_inode_info(&newinode, full_path, buf,
-                                         inode->i_sb, xid, &fileHandle);
+                                         inode->i_sb, xid, fileHandle);
                 if (newinode) {
                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
                                 newinode->i_mode = mode;
-                        if ((oplock & CIFS_CREATE_ACTION) &&
+                        if ((*oplock & CIFS_CREATE_ACTION) &&
                             (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
                                 newinode->i_uid = current_fsuid();
                                 if (inode->i_mode & S_ISGID)
@@ -321,40 +355,139 @@ cifs_create_get_file_info:
         }
 
 cifs_create_set_dentry:
-        if (rc == 0)
-                d_instantiate(direntry, newinode);
-        else
+        if (rc != 0) {
                 cFYI(1, "Create worked, get_inode_info failed rc = %d", rc);
+                goto out;
+        }
+        d_drop(direntry);
+        d_add(direntry, newinode);
 
-        if (newinode && nd) {
-                struct cifsFileInfo *pfile_info;
-                struct file *filp;
+        /* ENOENT for create?  How weird... */
+        rc = -ENOENT;
+        if (!newinode) {
+                CIFSSMBClose(xid, tcon, *fileHandle);
+                goto out;
+        }
+        rc = 0;
 
-                filp = lookup_instantiate_filp(nd, direntry, generic_file_open);
-                if (IS_ERR(filp)) {
-                        rc = PTR_ERR(filp);
-                        CIFSSMBClose(xid, tcon, fileHandle);
-                        goto cifs_create_out;
-                }
+out:
+        kfree(buf);
+        kfree(full_path);
+        return rc;
+}
 
-                pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock);
-                if (pfile_info == NULL) {
-                        fput(filp);
-                        CIFSSMBClose(xid, tcon, fileHandle);
-                        rc = -ENOMEM;
-                }
-        } else {
+int
+cifs_atomic_open(struct inode *inode, struct dentry *direntry,
+                 struct file *file, unsigned oflags, umode_t mode,
+                 int *opened)
+{
+        int rc;
+        int xid;
+        struct tcon_link *tlink;
+        struct cifs_tcon *tcon;
+        __u16 fileHandle;
+        __u32 oplock;
+        struct file *filp;
+        struct cifsFileInfo *pfile_info;
+
+        /* Posix open is only called (at lookup time) for file create now.  For
+         * opens (rather than creates), because we do not know if it is a file
+         * or directory yet, and current Samba no longer allows us to do posix
+         * open on dirs, we could end up wasting an open call on what turns out
+         * to be a dir. For file opens, we wait to call posix open till
+         * cifs_open.  It could be added to atomic_open in the future but the
+         * performance tradeoff of the extra network request when EISDIR or
+         * EACCES is returned would have to be weighed against the 50% reduction
+         * in network traffic in the other paths.
+         */
+        if (!(oflags & O_CREAT)) {
+                struct dentry *res = cifs_lookup(inode, direntry, 0);
+                if (IS_ERR(res))
+                        return PTR_ERR(res);
+
+                return finish_no_open(file, res);
+        }
+
+        rc = check_name(direntry);
+        if (rc)
+                return rc;
+
+        xid = GetXid();
+
+        cFYI(1, "parent inode = 0x%p name is: %s and dentry = 0x%p",
+             inode, direntry->d_name.name, direntry);
+
+        tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
+        filp = ERR_CAST(tlink);
+        if (IS_ERR(tlink))
+                goto free_xid;
+
+        tcon = tlink_tcon(tlink);
+
+        rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
+                            &oplock, &fileHandle, opened);
+
+        if (rc)
+                goto out;
+
+        rc = finish_open(file, direntry, generic_file_open, opened);
+        if (rc) {
                 CIFSSMBClose(xid, tcon, fileHandle);
+                goto out;
         }
 
-cifs_create_out:
-        kfree(buf);
-        kfree(full_path);
+        pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock);
+        if (pfile_info == NULL) {
+                CIFSSMBClose(xid, tcon, fileHandle);
+                fput(filp);
+                rc = -ENOMEM;
+        }
+
+out:
         cifs_put_tlink(tlink);
+free_xid:
         FreeXid(xid);
         return rc;
 }
 
+int cifs_create(struct inode *inode, struct dentry *direntry, umode_t mode,
+                bool excl)
+{
+        int rc;
+        int xid = GetXid();
+        /*
+         * BB below access is probably too much for mknod to request
+         *    but we have to do query and setpathinfo so requesting
+         *    less could fail (unless we want to request getatr and setatr
+         *    permissions (only).  At least for POSIX we do not have to
+         *    request so much.
+         */
+        unsigned oflags = O_EXCL | O_CREAT | O_RDWR;
+        struct tcon_link *tlink;
+        __u16 fileHandle;
+        __u32 oplock;
+        int created = FILE_CREATED;
+
+        cFYI(1, "cifs_create parent inode = 0x%p name is: %s and dentry = 0x%p",
+             inode, direntry->d_name.name, direntry);
+
+        tlink = cifs_sb_tlink(CIFS_SB(inode->i_sb));
+        rc = PTR_ERR(tlink);
+        if (IS_ERR(tlink))
+                goto free_xid;
+
+        rc = cifs_do_create(inode, direntry, xid, tlink, oflags, mode,
+                            &oplock, &fileHandle, &created);
+        if (!rc)
+                CIFSSMBClose(xid, tlink_tcon(tlink), fileHandle);
+
+        cifs_put_tlink(tlink);
+free_xid:
+        FreeXid(xid);
+
+        return rc;
+}
+
 int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode,
                 dev_t device_number)
 {
@@ -488,20 +621,15 @@ mknod_out:
 
 struct dentry *
 cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
-            struct nameidata *nd)
+            unsigned int flags)
 {
         int xid;
         int rc = 0; /* to get around spurious gcc warning, set to zero here */
-        __u32 oplock;
-        __u16 fileHandle = 0;
-        bool posix_open = false;
         struct cifs_sb_info *cifs_sb;
         struct tcon_link *tlink;
         struct cifs_tcon *pTcon;
-        struct cifsFileInfo *cfile;
         struct inode *newInode = NULL;
         char *full_path = NULL;
-        struct file *filp;
 
         xid = GetXid();
 
@@ -518,31 +646,9 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
         }
         pTcon = tlink_tcon(tlink);
 
-        oplock = pTcon->ses->server->oplocks ? REQ_OPLOCK : 0;
-
-        /*
-         * Don't allow the separator character in a path component.
-         * The VFS will not allow "/", but "\" is allowed by posix.
-         */
-        if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)) {
-                int i;
-                for (i = 0; i < direntry->d_name.len; i++)
-                        if (direntry->d_name.name[i] == '\\') {
-                                cFYI(1, "Invalid file name");
-                                rc = -EINVAL;
-                                goto lookup_out;
-                        }
-        }
-
-        /*
-         * O_EXCL: optimize away the lookup, but don't hash the dentry. Let
-         * the VFS handle the create.
-         */
-        if (nd && (nd->flags & LOOKUP_EXCL)) {
-                d_instantiate(direntry, NULL);
-                rc = 0;
+        rc = check_name(direntry);
+        if (rc)
                 goto lookup_out;
-        }
 
         /* can not grab the rename sem here since it would
         deadlock in the cases (beginning of sys_rename itself)
@@ -560,80 +666,16 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
         }
         cFYI(1, "Full path: %s inode = 0x%p", full_path, direntry->d_inode);
 
-        /* Posix open is only called (at lookup time) for file create now.
-         * For opens (rather than creates), because we do not know if it
-         * is a file or directory yet, and current Samba no longer allows
-         * us to do posix open on dirs, we could end up wasting an open call
-         * on what turns out to be a dir. For file opens, we wait to call posix
-         * open till cifs_open.  It could be added here (lookup) in the future
-         * but the performance tradeoff of the extra network request when EISDIR
-         * or EACCES is returned would have to be weighed against the 50%
-         * reduction in network traffic in the other paths.
-         */
         if (pTcon->unix_ext) {
-                if (nd && !(nd->flags & LOOKUP_DIRECTORY) &&
-                     (nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open &&
-                     (nd->intent.open.file->f_flags & O_CREAT)) {
-                        rc = cifs_posix_open(full_path, &newInode,
-                                        parent_dir_inode->i_sb,
-                                        nd->intent.open.create_mode,
-                                        nd->intent.open.file->f_flags, &oplock,
-                                        &fileHandle, xid);
-                        /*
-                         * The check below works around a bug in POSIX
-                         * open in samba versions 3.3.1 and earlier where
-                         * open could incorrectly fail with invalid parameter.
-                         * If either that or op not supported returned, follow
-                         * the normal lookup.
-                         */
-                        switch (rc) {
-                        case 0:
-                                /*
-                                 * The server may allow us to open things like
-                                 * FIFOs, but the client isn't set up to deal
-                                 * with that. If it's not a regular file, just
-                                 * close it and proceed as if it were a normal
-                                 * lookup.
-                                 */
-                                if (newInode && !S_ISREG(newInode->i_mode)) {
-                                        CIFSSMBClose(xid, pTcon, fileHandle);
-                                        break;
-                                }
-                        case -ENOENT:
-                                posix_open = true;
-                        case -EOPNOTSUPP:
-                                break;
-                        default:
-                                pTcon->broken_posix_open = true;
-                        }
-                }
-                if (!posix_open)
-                        rc = cifs_get_inode_info_unix(&newInode, full_path,
-                                                parent_dir_inode->i_sb, xid);
-        } else
+                rc = cifs_get_inode_info_unix(&newInode, full_path,
+                                              parent_dir_inode->i_sb, xid);
+        } else {
                 rc = cifs_get_inode_info(&newInode, full_path, NULL,
                                 parent_dir_inode->i_sb, xid, NULL);
+        }
 
         if ((rc == 0) && (newInode != NULL)) {
                 d_add(direntry, newInode);
-                if (posix_open) {
-                        filp = lookup_instantiate_filp(nd, direntry,
-                                                       generic_file_open);
-                        if (IS_ERR(filp)) {
-                                rc = PTR_ERR(filp);
-                                CIFSSMBClose(xid, pTcon, fileHandle);
-                                goto lookup_out;
-                        }
-
-                        cfile = cifs_new_fileinfo(fileHandle, filp, tlink,
-                                                  oplock);
-                        if (cfile == NULL) {
-                                fput(filp);
-                                CIFSSMBClose(xid, pTcon, fileHandle);
-                                rc = -ENOMEM;
-                                goto lookup_out;
-                        }
-                }
                 /* since paths are not looked up by component - the parent
                    directories are presumed to be good here */
                 renew_parental_timestamps(direntry);
@@ -658,9 +700,9 @@ lookup_out:
 }
 
 static int
-cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
+cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
 {
-        if (nd && (nd->flags & LOOKUP_RCU))
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         if (direntry->d_inode) {
@@ -689,7 +731,7 @@ cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
          * This may be nfsd (or something), anyway, we can't see the
          * intent of this. So, since this can be for creation, drop it.
          */
-        if (!nd)
+        if (!flags)
                 return 0;
 
         /*
@@ -697,7 +739,7 @@ cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd)
          * case sensitive name which is specified by user if this is
          * for creation.
          */
-        if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+        if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
                 return 0;
 
         if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled)
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 745da3d0653e..8e8bb49112ff 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -800,7 +800,7 @@ cifs_find_inode(struct inode *inode, void *opaque)
                 return 0;
 
         /* if it's not a directory or has no dentries, then flag it */
-        if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry))
+        if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
                 fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
 
         return 1;
@@ -825,9 +825,10 @@ static bool
 inode_has_hashed_dentries(struct inode *inode)
 {
         struct dentry *dentry;
+        struct hlist_node *p;
 
         spin_lock(&inode->i_lock);
-        list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+        hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                 if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
                         spin_unlock(&inode->i_lock);
                         return true;
diff --git a/fs/coda/cache.c b/fs/coda/cache.c
index 690157876184..958ae0e0ff8c 100644
--- a/fs/coda/cache.c
+++ b/fs/coda/cache.c
@@ -89,17 +89,13 @@ int coda_cache_check(struct inode *inode, int mask)
 /* this won't do any harm: just flag all children */
 static void coda_flag_children(struct dentry *parent, int flag)
 {
-        struct list_head *child;
         struct dentry *de;
 
         spin_lock(&parent->d_lock);
-        list_for_each(child, &parent->d_subdirs)
-        {
-                de = list_entry(child, struct dentry, d_u.d_child);
+        list_for_each_entry(de, &parent->d_subdirs, d_u.d_child) {
                 /* don't know what to do with negative dentries */
-                if ( ! de->d_inode ) 
-                        continue;
-                coda_flag_inode(de->d_inode, flag);
+                if (de->d_inode ) 
+                        coda_flag_inode(de->d_inode, flag);
         }
         spin_unlock(&parent->d_lock);
         return; 
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 177515829062..49fe52d25600 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -30,8 +30,8 @@
 #include "coda_int.h"
 
 /* dir inode-ops */
-static int coda_create(struct inode *dir, struct dentry *new, umode_t mode, struct nameidata *nd);
-static struct dentry *coda_lookup(struct inode *dir, struct dentry *target, struct nameidata *nd);
+static int coda_create(struct inode *dir, struct dentry *new, umode_t mode, bool excl);
+static struct dentry *coda_lookup(struct inode *dir, struct dentry *target, unsigned int flags);
 static int coda_link(struct dentry *old_dentry, struct inode *dir_inode, 
                      struct dentry *entry);
 static int coda_unlink(struct inode *dir_inode, struct dentry *entry);
@@ -46,7 +46,7 @@ static int coda_rename(struct inode *old_inode, struct dentry *old_dentry,
 static int coda_readdir(struct file *file, void *buf, filldir_t filldir);
 
 /* dentry ops */
-static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd);
+static int coda_dentry_revalidate(struct dentry *de, unsigned int flags);
 static int coda_dentry_delete(const struct dentry *);
 
 /* support routines */
@@ -94,7 +94,7 @@ const struct file_operations coda_dir_operations = {
 
 /* inode operations for directories */
 /* access routines: lookup, readlink, permission */
-static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struct nameidata *nd)
+static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, unsigned int flags)
 {
         struct super_block *sb = dir->i_sb;
         const char *name = entry->d_name.name;
@@ -188,7 +188,7 @@ static inline void coda_dir_drop_nlink(struct inode *dir)
 }
 
 /* creation routines: create, mknod, mkdir, link, symlink */
-static int coda_create(struct inode *dir, struct dentry *de, umode_t mode, struct nameidata *nd)
+static int coda_create(struct inode *dir, struct dentry *de, umode_t mode, bool excl)
 {
         int error;
         const char *name=de->d_name.name;
@@ -536,12 +536,12 @@ out:
 }
 
 /* called when a cache lookup succeeds */
-static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd)
+static int coda_dentry_revalidate(struct dentry *de, unsigned int flags)
 {
         struct inode *inode;
         struct coda_inode_info *cii;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         inode = de->d_inode;
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 7e6c52d8a207..7414ae24a79b 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -442,7 +442,7 @@ static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * den
 
 static struct dentry * configfs_lookup(struct inode *dir,
                                        struct dentry *dentry,
-                                       struct nameidata *nd)
+                                       unsigned int flags)
 {
         struct configfs_dirent * parent_sd = dentry->d_parent->d_fsdata;
         struct configfs_dirent * sd;
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index d013c46402ed..28cca01ca9c9 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -417,7 +417,7 @@ static int cramfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 /*
  * Lookup and fill in the inode data..
  */
-static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         unsigned int offset = 0;
         struct inode *inode = NULL;
diff --git a/fs/dcache.c b/fs/dcache.c
index 40469044088d..8086636bf796 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -218,7 +218,7 @@ static void __d_free(struct rcu_head *head)
 {
         struct dentry *dentry = container_of(head, struct dentry, d_u.d_rcu);
 
-        WARN_ON(!list_empty(&dentry->d_alias));
+        WARN_ON(!hlist_unhashed(&dentry->d_alias));
         if (dname_external(dentry))
                 kfree(dentry->d_name.name);
         kmem_cache_free(dentry_cache, dentry); 
@@ -267,7 +267,7 @@ static void dentry_iput(struct dentry * dentry)
         struct inode *inode = dentry->d_inode;
         if (inode) {
                 dentry->d_inode = NULL;
-                list_del_init(&dentry->d_alias);
+                hlist_del_init(&dentry->d_alias);
                 spin_unlock(&dentry->d_lock);
                 spin_unlock(&inode->i_lock);
                 if (!inode->i_nlink)
@@ -291,7 +291,7 @@ static void dentry_unlink_inode(struct dentry * dentry)
 {
         struct inode *inode = dentry->d_inode;
         dentry->d_inode = NULL;
-        list_del_init(&dentry->d_alias);
+        hlist_del_init(&dentry->d_alias);
         dentry_rcuwalk_barrier(dentry);
         spin_unlock(&dentry->d_lock);
         spin_unlock(&inode->i_lock);
@@ -699,10 +699,11 @@ EXPORT_SYMBOL(dget_parent);
 static struct dentry *__d_find_alias(struct inode *inode, int want_discon)
 {
         struct dentry *alias, *discon_alias;
+        struct hlist_node *p;
 
 again:
         discon_alias = NULL;
-        list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+        hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
                 spin_lock(&alias->d_lock);
                 if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) {
                         if (IS_ROOT(alias) &&
@@ -737,7 +738,7 @@ struct dentry *d_find_alias(struct inode *inode)
 {
         struct dentry *de = NULL;
 
-        if (!list_empty(&inode->i_dentry)) {
+        if (!hlist_empty(&inode->i_dentry)) {
                 spin_lock(&inode->i_lock);
                 de = __d_find_alias(inode, 0);
                 spin_unlock(&inode->i_lock);
@@ -753,9 +754,10 @@ EXPORT_SYMBOL(d_find_alias);
 void d_prune_aliases(struct inode *inode)
 {
         struct dentry *dentry;
+        struct hlist_node *p;
 restart:
         spin_lock(&inode->i_lock);
-        list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+        hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                 spin_lock(&dentry->d_lock);
                 if (!dentry->d_count) {
                         __dget_dlock(dentry);
@@ -977,7 +979,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
                         inode = dentry->d_inode;
                         if (inode) {
                                 dentry->d_inode = NULL;
-                                list_del_init(&dentry->d_alias);
+                                hlist_del_init(&dentry->d_alias);
                                 if (dentry->d_op && dentry->d_op->d_iput)
                                         dentry->d_op->d_iput(dentry, inode);
                                 else
@@ -1312,7 +1314,7 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
         INIT_HLIST_BL_NODE(&dentry->d_hash);
         INIT_LIST_HEAD(&dentry->d_lru);
         INIT_LIST_HEAD(&dentry->d_subdirs);
-        INIT_LIST_HEAD(&dentry->d_alias);
+        INIT_HLIST_NODE(&dentry->d_alias);
         INIT_LIST_HEAD(&dentry->d_u.d_child);
         d_set_d_op(dentry, dentry->d_sb->s_d_op);
 
@@ -1400,7 +1402,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
         if (inode) {
                 if (unlikely(IS_AUTOMOUNT(inode)))
                         dentry->d_flags |= DCACHE_NEED_AUTOMOUNT;
-                list_add(&dentry->d_alias, &inode->i_dentry);
+                hlist_add_head(&dentry->d_alias, &inode->i_dentry);
         }
         dentry->d_inode = inode;
         dentry_rcuwalk_barrier(dentry);
@@ -1425,7 +1427,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
  
 void d_instantiate(struct dentry *entry, struct inode * inode)
 {
-        BUG_ON(!list_empty(&entry->d_alias));
+        BUG_ON(!hlist_unhashed(&entry->d_alias));
         if (inode)
                 spin_lock(&inode->i_lock);
         __d_instantiate(entry, inode);
@@ -1458,13 +1460,14 @@ static struct dentry *__d_instantiate_unique(struct dentry *entry,
         int len = entry->d_name.len;
         const char *name = entry->d_name.name;
         unsigned int hash = entry->d_name.hash;
+        struct hlist_node *p;
 
         if (!inode) {
                 __d_instantiate(entry, NULL);
                 return NULL;
         }
 
-        list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+        hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
                 /*
                  * Don't need alias->d_lock here, because aliases with
                  * d_parent == entry->d_parent are not subject to name or
@@ -1490,7 +1493,7 @@ struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode)
 {
         struct dentry *result;
 
-        BUG_ON(!list_empty(&entry->d_alias));
+        BUG_ON(!hlist_unhashed(&entry->d_alias));
 
         if (inode)
                 spin_lock(&inode->i_lock);
@@ -1531,9 +1534,9 @@ static struct dentry * __d_find_any_alias(struct inode *inode)
 {
         struct dentry *alias;
 
-        if (list_empty(&inode->i_dentry))
+        if (hlist_empty(&inode->i_dentry))
                 return NULL;
-        alias = list_first_entry(&inode->i_dentry, struct dentry, d_alias);
+        alias = hlist_entry(inode->i_dentry.first, struct dentry, d_alias);
         __dget(alias);
         return alias;
 }
@@ -1607,7 +1610,7 @@ struct dentry *d_obtain_alias(struct inode *inode)
         spin_lock(&tmp->d_lock);
         tmp->d_inode = inode;
         tmp->d_flags |= DCACHE_DISCONNECTED;
-        list_add(&tmp->d_alias, &inode->i_dentry);
+        hlist_add_head(&tmp->d_alias, &inode->i_dentry);
         hlist_bl_lock(&tmp->d_sb->s_anon);
         hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_anon);
         hlist_bl_unlock(&tmp->d_sb->s_anon);
@@ -2384,14 +2387,13 @@ static struct dentry *__d_unalias(struct inode *inode,
                 struct dentry *dentry, struct dentry *alias)
 {
         struct mutex *m1 = NULL, *m2 = NULL;
-        struct dentry *ret;
+        struct dentry *ret = ERR_PTR(-EBUSY);
 
         /* If alias and dentry share a parent, then no extra locks required */
         if (alias->d_parent == dentry->d_parent)
                 goto out_unalias;
 
         /* See lock_rename() */
-        ret = ERR_PTR(-EBUSY);
         if (!mutex_trylock(&dentry->d_sb->s_vfs_rename_mutex))
                 goto out_err;
         m1 = &dentry->d_sb->s_vfs_rename_mutex;
@@ -2399,8 +2401,10 @@ static struct dentry *__d_unalias(struct inode *inode,
                 goto out_err;
         m2 = &alias->d_parent->d_inode->i_mutex;
 out_unalias:
-        __d_move(alias, dentry);
-        ret = alias;
+        if (likely(!d_mountpoint(alias))) {
+                __d_move(alias, dentry);
+                ret = alias;
+        }
 out_err:
         spin_unlock(&inode->i_lock);
         if (m2)
@@ -2622,7 +2626,7 @@ global_root:
         if (!slash)
                 error = prepend(buffer, buflen, "/", 1);
         if (!error)
-                error = real_mount(vfsmnt)->mnt_ns ? 1 : 2;
+                error = is_mounted(vfsmnt) ? 1 : 2;
         goto out;
 }
 
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index b80bc846a15a..d17c20fd74e6 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -54,13 +54,12 @@ static struct inode *debugfs_get_inode(struct super_block *sb, umode_t mode, dev
                         break;
                 case S_IFLNK:
                         inode->i_op = &debugfs_link_operations;
-                        inode->i_fop = fops;
                         inode->i_private = data;
                         break;
                 case S_IFDIR:
                         inode->i_op = &simple_dir_inode_operations;
-                        inode->i_fop = fops ? fops : &simple_dir_operations;
-                        inode->i_private = data;
+                        inode->i_fop = &simple_dir_operations;
+                        inode->i_private = NULL;
 
                         /* directory inodes start off with i_nlink == 2
                          * (for "." entry) */
@@ -91,13 +90,12 @@ static int debugfs_mknod(struct inode *dir, struct dentry *dentry,
         return error;
 }
 
-static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode,
-                         void *data, const struct file_operations *fops)
+static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
         int res;
 
         mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
-        res = debugfs_mknod(dir, dentry, mode, 0, data, fops);
+        res = debugfs_mknod(dir, dentry, mode, 0, NULL, NULL);
         if (!res) {
                 inc_nlink(dir);
                 fsnotify_mkdir(dir, dentry);
@@ -106,10 +104,10 @@ static int debugfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode,
 }
 
 static int debugfs_link(struct inode *dir, struct dentry *dentry, umode_t mode,
-                        void *data, const struct file_operations *fops)
+                        void *data)
 {
         mode = (mode & S_IALLUGO) | S_IFLNK;
-        return debugfs_mknod(dir, dentry, mode, 0, data, fops);
+        return debugfs_mknod(dir, dentry, mode, 0, data, NULL);
 }
 
 static int debugfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
@@ -293,13 +291,19 @@ static struct file_system_type debug_fs_type = {
         .kill_sb =      kill_litter_super,
 };
 
-static int debugfs_create_by_name(const char *name, umode_t mode,
-                                  struct dentry *parent,
-                                  struct dentry **dentry,
-                                  void *data,
-                                  const struct file_operations *fops)
+struct dentry *__create_file(const char *name, umode_t mode,
+                                   struct dentry *parent, void *data,
+                                   const struct file_operations *fops)
 {
-        int error = 0;
+        struct dentry *dentry = NULL;
+        int error;
+
+        pr_debug("debugfs: creating file '%s'\n",name);
+
+        error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
+                              &debugfs_mount_count);
+        if (error)
+                goto exit;
 
         /* If the parent is not specified, we create it in the root.
          * We need the root dentry to do this, which is in the super 
@@ -309,30 +313,35 @@ static int debugfs_create_by_name(const char *name, umode_t mode,
         if (!parent)
                 parent = debugfs_mount->mnt_root;
 
-        *dentry = NULL;
+        dentry = NULL;
         mutex_lock(&parent->d_inode->i_mutex);
-        *dentry = lookup_one_len(name, parent, strlen(name));
-        if (!IS_ERR(*dentry)) {
+        dentry = lookup_one_len(name, parent, strlen(name));
+        if (!IS_ERR(dentry)) {
                 switch (mode & S_IFMT) {
                 case S_IFDIR:
-                        error = debugfs_mkdir(parent->d_inode, *dentry, mode,
-                                              data, fops);
+                        error = debugfs_mkdir(parent->d_inode, dentry, mode);
+                                              
                         break;
                 case S_IFLNK:
-                        error = debugfs_link(parent->d_inode, *dentry, mode,
-                                             data, fops);
+                        error = debugfs_link(parent->d_inode, dentry, mode,
+                                             data);
                         break;
                 default:
-                        error = debugfs_create(parent->d_inode, *dentry, mode,
+                        error = debugfs_create(parent->d_inode, dentry, mode,
                                                data, fops);
                         break;
                 }
-                dput(*dentry);
+                dput(dentry);
         } else
-                error = PTR_ERR(*dentry);
+                error = PTR_ERR(dentry);
         mutex_unlock(&parent->d_inode->i_mutex);
 
-        return error;
+        if (error) {
+                dentry = NULL;
+                simple_release_fs(&debugfs_mount, &debugfs_mount_count);
+        }
+exit:
+        return dentry;
 }
 
 /**
@@ -365,25 +374,15 @@ struct dentry *debugfs_create_file(const char *name, umode_t mode,
                                    struct dentry *parent, void *data,
                                    const struct file_operations *fops)
 {
-        struct dentry *dentry = NULL;
-        int error;
-
-        pr_debug("debugfs: creating file '%s'\n",name);
-
-        error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
-                              &debugfs_mount_count);
-        if (error)
-                goto exit;
-
-        error = debugfs_create_by_name(name, mode, parent, &dentry,
-                                       data, fops);
-        if (error) {
-                dentry = NULL;
-                simple_release_fs(&debugfs_mount, &debugfs_mount_count);
-                goto exit;
+        switch (mode & S_IFMT) {
+        case S_IFREG:
+        case 0:
+                break;
+        default:
+                BUG();
         }
-exit:
-        return dentry;
+
+        return __create_file(name, mode, parent, data, fops);
 }
 EXPORT_SYMBOL_GPL(debugfs_create_file);
 
@@ -407,8 +406,7 @@ EXPORT_SYMBOL_GPL(debugfs_create_file);
  */
 struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)
 {
-        return debugfs_create_file(name, 
-                                   S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
+        return __create_file(name, S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
                                    parent, NULL, NULL);
 }
 EXPORT_SYMBOL_GPL(debugfs_create_dir);
@@ -446,8 +444,7 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
         if (!link)
                 return NULL;
 
-        result = debugfs_create_file(name, S_IFLNK | S_IRWXUGO, parent, link,
-                                     NULL);
+        result = __create_file(name, S_IFLNK | S_IRWXUGO, parent, link, NULL);
         if (!result)
                 kfree(link);
         return result;
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 979c1e309c73..14afbabe6546 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -439,15 +439,15 @@ static struct dentry *devpts_mount(struct file_system_type *fs_type,
                 return ERR_PTR(error);
 
         if (opts.newinstance)
-                s = sget(fs_type, NULL, set_anon_super, NULL);
+                s = sget(fs_type, NULL, set_anon_super, flags, NULL);
         else
-                s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL);
+                s = sget(fs_type, compare_init_pts_sb, set_anon_super, flags,
+                         NULL);
 
         if (IS_ERR(s))
                 return ERR_CAST(s);
 
         if (!s->s_root) {
-                s->s_flags = flags;
                 error = devpts_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
                 if (error)
                         goto out_undo_sget;
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 0c85fae37666..1faf4cb56f39 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1258,7 +1258,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
          */
         BUG_ON(retval == -EIOCBQUEUED);
         if (dio->is_async && retval == 0 && dio->result &&
-            ((rw & READ) || (dio->result == sdio.size)))
+            ((rw == READ) || (dio->result == sdio.size)))
                 retval = -EIOCBQUEUED;
 
         if (retval != -EIOCBQUEUED)
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index 534c1d46e69e..1b5d9af937df 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -32,7 +32,7 @@
 /**
  * ecryptfs_d_revalidate - revalidate an ecryptfs dentry
  * @dentry: The ecryptfs dentry
- * @nd: The associated nameidata
+ * @flags: lookup flags
  *
  * Called when the VFS needs to revalidate a dentry. This
  * is called whenever a name lookup finds a dentry in the
@@ -42,32 +42,20 @@
  * Returns 1 if valid, 0 otherwise.
  *
  */
-static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int ecryptfs_d_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct dentry *lower_dentry;
         struct vfsmount *lower_mnt;
-        struct dentry *dentry_save = NULL;
-        struct vfsmount *vfsmount_save = NULL;
         int rc = 1;
 
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         lower_dentry = ecryptfs_dentry_to_lower(dentry);
         lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
         if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
                 goto out;
-        if (nd) {
-                dentry_save = nd->path.dentry;
-                vfsmount_save = nd->path.mnt;
-                nd->path.dentry = lower_dentry;
-                nd->path.mnt = lower_mnt;
-        }
-        rc = lower_dentry->d_op->d_revalidate(lower_dentry, nd);
-        if (nd) {
-                nd->path.dentry = dentry_save;
-                nd->path.mnt = vfsmount_save;
-        }
+        rc = lower_dentry->d_op->d_revalidate(lower_dentry, flags);
         if (dentry->d_inode) {
                 struct inode *lower_inode =
                         ecryptfs_inode_to_lower(dentry->d_inode);
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 867b64c5d84f..989e034f02bd 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -550,20 +550,6 @@ 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;
-};
 
 struct inode *ecryptfs_get_inode(struct inode *lower_inode,
                                  struct super_block *sb);
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index a07441a0a878..ffa2be57804d 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -173,7 +173,7 @@ ecryptfs_do_create(struct inode *directory_inode,
                 inode = ERR_CAST(lower_dir_dentry);
                 goto out;
         }
-        rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, NULL);
+        rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, true);
         if (rc) {
                 printk(KERN_ERR "%s: Failure to create dentry in lower fs; "
                        "rc = [%d]\n", __func__, rc);
@@ -240,7 +240,6 @@ out:
  * @dir: The inode of the directory in which to create the file.
  * @dentry: The eCryptfs dentry
  * @mode: The mode of the new file.
- * @nd: nameidata
  *
  * Creates a new file.
  *
@@ -248,7 +247,7 @@ out:
  */
 static int
 ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
-                umode_t mode, struct nameidata *nd)
+                umode_t mode, bool excl)
 {
         struct inode *ecryptfs_inode;
         int rc;
@@ -270,8 +269,8 @@ ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
                 iput(ecryptfs_inode);
                 goto out;
         }
-        d_instantiate(ecryptfs_dentry, ecryptfs_inode);
         unlock_new_inode(ecryptfs_inode);
+        d_instantiate(ecryptfs_dentry, ecryptfs_inode);
 out:
         return rc;
 }
@@ -374,7 +373,7 @@ static int ecryptfs_lookup_interpose(struct dentry *dentry,
  */
 static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode,
                                       struct dentry *ecryptfs_dentry,
-                                      struct nameidata *ecryptfs_nd)
+                                      unsigned int flags)
 {
         char *encrypted_and_encoded_name = NULL;
         size_t encrypted_and_encoded_name_size;
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index 0dbe58a8b172..809e67d05ca3 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -27,7 +27,12 @@
 #include <linux/mount.h>
 #include "ecryptfs_kernel.h"
 
-struct kmem_cache *ecryptfs_open_req_cache;
+struct ecryptfs_open_req {
+        struct file **lower_file;
+        struct path path;
+        struct completion done;
+        struct list_head kthread_ctl_list;
+};
 
 static struct ecryptfs_kthread_ctl {
 #define ECRYPTFS_KTHREAD_ZOMBIE 0x00000001
@@ -67,18 +72,10 @@ static int ecryptfs_threadfn(void *ignored)
                         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), current_cred());
-                                req->flags |= ECRYPTFS_REQ_PROCESSED;
-                        }
-                        wake_up(&req->wait);
-                        mutex_unlock(&req->mux);
+                        *req->lower_file = dentry_open(&req->path,
+                                (O_RDWR | O_LARGEFILE), current_cred());
+                        complete(&req->done);
                 }
                 mutex_unlock(&ecryptfs_kthread_ctl.mux);
         }
@@ -111,10 +108,9 @@ void ecryptfs_destroy_kthread(void)
         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);
+                list_del(&req->kthread_ctl_list);
+                *req->lower_file = ERR_PTR(-EIO);
+                complete(&req->done);
         }
         mutex_unlock(&ecryptfs_kthread_ctl.mux);
         kthread_stop(ecryptfs_kthread);
@@ -136,34 +132,26 @@ int ecryptfs_privileged_open(struct file **lower_file,
                              struct vfsmount *lower_mnt,
                              const struct cred *cred)
 {
-        struct ecryptfs_open_req *req;
+        struct ecryptfs_open_req req;
         int flags = O_LARGEFILE;
         int rc = 0;
 
+        init_completion(&req.done);
+        req.lower_file = lower_file;
+        req.path.dentry = lower_dentry;
+        req.path.mnt = lower_mnt;
+
         /* Corresponding dput() and mntput() are done when the
          * lower file is fput() when all eCryptfs files for the inode are
          * released. */
-        dget(lower_dentry);
-        mntget(lower_mnt);
         flags |= IS_RDONLY(lower_dentry->d_inode) ? O_RDONLY : O_RDWR;
-        (*lower_file) = dentry_open(lower_dentry, lower_mnt, flags, cred);
+        (*lower_file) = dentry_open(&req.path, flags, cred);
         if (!IS_ERR(*lower_file))
                 goto out;
         if ((flags & O_ACCMODE) == O_RDONLY) {
                 rc = PTR_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;
@@ -171,27 +159,14 @@ int ecryptfs_privileged_open(struct file **lower_file,
                 printk(KERN_ERR "%s: We are in the middle of shutting down; "
                        "aborting privileged request to open lower file\n",
                         __func__);
-                goto out_free;
+                goto out;
         }
-        list_add_tail(&req->kthread_ctl_list, &ecryptfs_kthread_ctl.req_list);
+        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);
-out_unlock:
-        mutex_unlock(&req->mux);
-out_free:
-        kmem_cache_free(ecryptfs_open_req_cache, req);
+        wait_for_completion(&req.done);
+        if (IS_ERR(*lower_file))
+                rc = PTR_ERR(*lower_file);
 out:
         return rc;
 }
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 68954937a071..1c0b3b6b75c6 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -499,13 +499,12 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags
                 goto out;
         }
 
-        s = sget(fs_type, NULL, set_anon_super, NULL);
+        s = sget(fs_type, NULL, set_anon_super, flags, NULL);
         if (IS_ERR(s)) {
                 rc = PTR_ERR(s);
                 goto out;
         }
 
-        s->s_flags = flags;
         rc = bdi_setup_and_register(&sbi->bdi, "ecryptfs", BDI_CAP_MAP_COPY);
         if (rc)
                 goto out1;
@@ -682,11 +681,6 @@ 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)
diff --git a/fs/efs/efs.h b/fs/efs/efs.h
index d8305b582ab0..5528926ac7f6 100644
--- a/fs/efs/efs.h
+++ b/fs/efs/efs.h
@@ -129,7 +129,7 @@ extern struct inode *efs_iget(struct super_block *, unsigned long);
 extern efs_block_t efs_map_block(struct inode *, efs_block_t);
 extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
 
-extern struct dentry *efs_lookup(struct inode *, struct dentry *, struct nameidata *);
+extern struct dentry *efs_lookup(struct inode *, struct dentry *, unsigned int);
 extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
                 int fh_len, int fh_type);
 extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
diff --git a/fs/efs/namei.c b/fs/efs/namei.c
index 832b10ded82f..96f66d213a19 100644
--- a/fs/efs/namei.c
+++ b/fs/efs/namei.c
@@ -58,7 +58,8 @@ static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len)
         return(0);
 }
 
-struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) {
+struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
         efs_ino_t inodenum;
         struct inode *inode = NULL;
 
diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c
index fc7161d6bf6b..4731fd991efe 100644
--- a/fs/exofs/namei.c
+++ b/fs/exofs/namei.c
@@ -46,7 +46,7 @@ static inline int exofs_add_nondir(struct dentry *dentry, struct inode *inode)
 }
 
 static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry,
-                                   struct nameidata *nd)
+                                   unsigned int flags)
 {
         struct inode *inode;
         ino_t ino;
@@ -60,7 +60,7 @@ static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry,
 }
 
 static int exofs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                         struct nameidata *nd)
+                         bool excl)
 {
         struct inode *inode = exofs_new_inode(dir, mode);
         int err = PTR_ERR(inode);
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index b0201ca6e9c6..29ab099e3e08 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -19,19 +19,19 @@
 #define dprintk(fmt, args...) do{}while(0)
 
 
-static int get_name(struct vfsmount *mnt, struct dentry *dentry, char *name,
-                struct dentry *child);
+static int get_name(const struct path *path, char *name, struct dentry *child);
 
 
 static int exportfs_get_name(struct vfsmount *mnt, struct dentry *dir,
                 char *name, struct dentry *child)
 {
         const struct export_operations *nop = dir->d_sb->s_export_op;
+        struct path path = {.mnt = mnt, .dentry = dir};
 
         if (nop->get_name)
                 return nop->get_name(dir, name, child);
         else
-                return get_name(mnt, dir, name, child);
+                return get_name(&path, name, child);
 }
 
 /*
@@ -44,13 +44,14 @@ find_acceptable_alias(struct dentry *result,
 {
         struct dentry *dentry, *toput = NULL;
         struct inode *inode;
+        struct hlist_node *p;
 
         if (acceptable(context, result))
                 return result;
 
         inode = result->d_inode;
         spin_lock(&inode->i_lock);
-        list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+        hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                 dget(dentry);
                 spin_unlock(&inode->i_lock);
                 if (toput)
@@ -248,11 +249,10 @@ static int filldir_one(void * __buf, const char * name, int len,
  * calls readdir on the parent until it finds an entry with
  * the same inode number as the child, and returns that.
  */
-static int get_name(struct vfsmount *mnt, struct dentry *dentry,
-                char *name, struct dentry *child)
+static int get_name(const struct path *path, char *name, struct dentry *child)
 {
         const struct cred *cred = current_cred();
-        struct inode *dir = dentry->d_inode;
+        struct inode *dir = path->dentry->d_inode;
         int error;
         struct file *file;
         struct getdents_callback buffer;
@@ -266,7 +266,7 @@ static int get_name(struct vfsmount *mnt, struct dentry *dentry,
         /*
          * Open the directory ...
          */
-        file = dentry_open(dget(dentry), mntget(mnt), O_RDONLY, cred);
+        file = dentry_open(path, O_RDONLY, cred);
         error = PTR_ERR(file);
         if (IS_ERR(file))
                 goto out;
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index f663a67d7bf0..73b0d9519836 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -41,8 +41,8 @@ static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode)
 {
         int err = ext2_add_link(dentry, inode);
         if (!err) {
-                d_instantiate(dentry, inode);
                 unlock_new_inode(inode);
+                d_instantiate(dentry, inode);
                 return 0;
         }
         inode_dec_link_count(inode);
@@ -55,7 +55,7 @@ static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode)
  * Methods themselves.
  */
 
-static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
 {
         struct inode * inode;
         ino_t ino;
@@ -94,7 +94,7 @@ struct dentry *ext2_get_parent(struct dentry *child)
  * If the create succeeds, we fill in the inode information
  * with d_instantiate(). 
  */
-static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode, struct nameidata *nd)
+static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
 {
         struct inode *inode;
 
@@ -242,8 +242,8 @@ static int ext2_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
         if (err)
                 goto out_fail;
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
 out:
         return err;
 
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index b3621cb7ea31..5df3d2d8169c 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1184,6 +1184,12 @@ static int ext2_sync_fs(struct super_block *sb, int wait)
         struct ext2_sb_info *sbi = EXT2_SB(sb);
         struct ext2_super_block *es = EXT2_SB(sb)->s_es;
 
+        /*
+         * Write quota structures to quota file, sync_blockdev() will write
+         * them to disk later
+         */
+        dquot_writeback_dquots(sb, -1);
+
         spin_lock(&sbi->s_lock);
         if (es->s_state & cpu_to_le16(EXT2_VALID_FS)) {
                 ext2_debug("setting valid to 0\n");
diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c
index 92490e9f85ca..c8fff930790d 100644
--- a/fs/ext3/dir.c
+++ b/fs/ext3/dir.c
@@ -300,10 +300,11 @@ loff_t ext3_dir_llseek(struct file *file, loff_t offset, int origin)
 {
         struct inode *inode = file->f_mapping->host;
         int dx_dir = is_dx_dir(inode);
+        loff_t htree_max = ext3_get_htree_eof(file);
 
         if (likely(dx_dir))
                 return generic_file_llseek_size(file, offset, origin,
-                                                ext3_get_htree_eof(file));
+                                                htree_max, htree_max);
         else
                 return generic_file_llseek(file, offset, origin);
 }
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index eeb63dfc5d20..8f4fddac01a6 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1011,7 +1011,7 @@ errout:
         return NULL;
 }
 
-static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
 {
         struct inode * inode;
         struct ext3_dir_entry_2 * de;
@@ -1671,8 +1671,8 @@ static int ext3_add_nondir(handle_t *handle,
         int err = ext3_add_entry(handle, dentry, inode);
         if (!err) {
                 ext3_mark_inode_dirty(handle, inode);
-                d_instantiate(dentry, inode);
                 unlock_new_inode(inode);
+                d_instantiate(dentry, inode);
                 return 0;
         }
         drop_nlink(inode);
@@ -1690,7 +1690,7 @@ static int ext3_add_nondir(handle_t *handle,
  * with d_instantiate().
  */
 static int ext3_create (struct inode * dir, struct dentry * dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
         handle_t *handle;
         struct inode * inode;
@@ -1836,8 +1836,8 @@ out_clear_inode:
         if (err)
                 goto out_clear_inode;
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
 out_stop:
         brelse(dir_block);
         ext3_journal_stop(handle);
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 8c3a44b7c375..4ac304c55c53 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -2526,6 +2526,11 @@ static int ext3_sync_fs(struct super_block *sb, int wait)
         tid_t target;
 
         trace_ext3_sync_fs(sb, wait);
+        /*
+         * Writeback quota in non-journalled quota case - journalled quota has
+         * no dirty dquots
+         */
+        dquot_writeback_dquots(sb, -1);
         if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
                 if (wait)
                         log_wait_commit(EXT3_SB(sb)->s_journal, target);
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index aa39e600d159..8e07d2a5a139 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -324,74 +324,27 @@ static inline loff_t ext4_get_htree_eof(struct file *filp)
 
 
 /*
- * ext4_dir_llseek() based on generic_file_llseek() to handle both
- * non-htree and htree directories, where the "offset" is in terms
- * of the filename hash value instead of the byte offset.
+ * ext4_dir_llseek() calls generic_file_llseek_size to handle htree
+ * directories, where the "offset" is in terms of the filename hash
+ * value instead of the byte offset.
  *
- * NOTE: offsets obtained *before* ext4_set_inode_flag(dir, EXT4_INODE_INDEX)
- *       will be invalid once the directory was converted into a dx directory
+ * Because we may return a 64-bit hash that is well beyond offset limits,
+ * we need to pass the max hash as the maximum allowable offset in
+ * the htree directory case.
+ *
+ * For non-htree, ext4_llseek already chooses the proper max offset.
  */
 loff_t ext4_dir_llseek(struct file *file, loff_t offset, int origin)
 {
         struct inode *inode = file->f_mapping->host;
-        loff_t ret = -EINVAL;
         int dx_dir = is_dx_dir(inode);
+        loff_t htree_max = ext4_get_htree_eof(file);
 
-        mutex_lock(&inode->i_mutex);
-
-        /* NOTE: relative offsets with dx directories might not work
-         *       as expected, as it is difficult to figure out the
-         *       correct offset between dx hashes */
-
-        switch (origin) {
-        case SEEK_END:
-                if (unlikely(offset > 0))
-                        goto out_err; /* not supported for directories */
-
-                /* so only negative offsets are left, does that have a
-                 * meaning for directories at all? */
-                if (dx_dir)
-                        offset += ext4_get_htree_eof(file);
-                else
-                        offset += inode->i_size;
-                break;
-        case SEEK_CUR:
-                /*
-                 * Here we special-case the lseek(fd, 0, SEEK_CUR)
-                 * position-querying operation.  Avoid rewriting the "same"
-                 * f_pos value back to the file because a concurrent read(),
-                 * write() or lseek() might have altered it
-                 */
-                if (offset == 0) {
-                        offset = file->f_pos;
-                        goto out_ok;
-                }
-
-                offset += file->f_pos;
-                break;
-        }
-
-        if (unlikely(offset < 0))
-                goto out_err;
-
-        if (!dx_dir) {
-                if (offset > inode->i_sb->s_maxbytes)
-                        goto out_err;
-        } else if (offset > ext4_get_htree_eof(file))
-                goto out_err;
-
-        /* Special lock needed here? */
-        if (offset != file->f_pos) {
-                file->f_pos = offset;
-                file->f_version = 0;
-        }
-
-out_ok:
-        ret = offset;
-out_err:
-        mutex_unlock(&inode->i_mutex);
-
-        return ret;
+        if (likely(dx_dir))
+                return generic_file_llseek_size(file, offset, origin,
+                                                    htree_max, htree_max);
+        else
+                return ext4_llseek(file, offset, origin);
 }
 
 /*
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 8c7642a00054..782eecb57e43 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -211,9 +211,9 @@ static int ext4_file_open(struct inode * inode, struct file * filp)
 }
 
 /*
- * ext4_llseek() copied from generic_file_llseek() to handle both
- * block-mapped and extent-mapped maxbytes values. This should
- * otherwise be identical with generic_file_llseek().
+ * ext4_llseek() handles both block-mapped and extent-mapped maxbytes values
+ * by calling generic_file_llseek_size() with the appropriate maxbytes
+ * value for each.
  */
 loff_t ext4_llseek(struct file *file, loff_t offset, int origin)
 {
@@ -225,7 +225,8 @@ loff_t ext4_llseek(struct file *file, loff_t offset, int origin)
         else
                 maxbytes = inode->i_sb->s_maxbytes;
 
-        return generic_file_llseek_size(file, offset, origin, maxbytes);
+        return generic_file_llseek_size(file, offset, origin,
+                                        maxbytes, i_size_read(inode));
 }
 
 const struct file_operations ext4_file_operations = {
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index bb6c7d811313..2a1dcea4f12e 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -135,14 +135,7 @@ static int ext4_sync_parent(struct inode *inode)
         inode = igrab(inode);
         while (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY)) {
                 ext4_clear_inode_state(inode, EXT4_STATE_NEWENTRY);
-                dentry = NULL;
-                spin_lock(&inode->i_lock);
-                if (!list_empty(&inode->i_dentry)) {
-                        dentry = list_first_entry(&inode->i_dentry,
-                                                  struct dentry, d_alias);
-                        dget(dentry);
-                }
-                spin_unlock(&inode->i_lock);
+                dentry = d_find_any_alias(inode);
                 if (!dentry)
                         break;
                 next = igrab(dentry->d_parent->d_inode);
@@ -232,7 +225,7 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 
         if (!journal) {
                 ret = __sync_inode(inode, datasync);
-                if (!ret && !list_empty(&inode->i_dentry))
+                if (!ret && !hlist_empty(&inode->i_dentry))
                         ret = ext4_sync_parent(inode);
                 goto out;
         }
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 6ec6f9ee2fec..7f7dad787603 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -389,7 +389,7 @@ group_add_out:
                 if (err)
                         return err;
 
-                err = mnt_want_write(filp->f_path.mnt);
+                err = mnt_want_write_file(filp);
                 if (err)
                         goto resizefs_out;
 
@@ -401,7 +401,7 @@ group_add_out:
                 }
                 if (err == 0)
                         err = err2;
-                mnt_drop_write(filp->f_path.mnt);
+                mnt_drop_write_file(filp);
 resizefs_out:
                 ext4_resize_end(sb);
                 return err;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 5845cd97bf8b..d0d3f0e87f99 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1312,7 +1312,7 @@ errout:
         return NULL;
 }
 
-static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         struct inode *inode;
         struct ext4_dir_entry_2 *de;
@@ -2072,8 +2072,8 @@ static int ext4_add_nondir(handle_t *handle,
         int err = ext4_add_entry(handle, dentry, inode);
         if (!err) {
                 ext4_mark_inode_dirty(handle, inode);
-                d_instantiate(dentry, inode);
                 unlock_new_inode(inode);
+                d_instantiate(dentry, inode);
                 return 0;
         }
         drop_nlink(inode);
@@ -2091,7 +2091,7 @@ static int ext4_add_nondir(handle_t *handle,
  * with d_instantiate().
  */
 static int ext4_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                       struct nameidata *nd)
+                       bool excl)
 {
         handle_t *handle;
         struct inode *inode;
@@ -2249,8 +2249,8 @@ out_clear_inode:
         err = ext4_mark_inode_dirty(handle, dir);
         if (err)
                 goto out_clear_inode;
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
 out_stop:
         brelse(dir_block);
         ext4_journal_stop(handle);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index eb7aa3e4ef05..d8759401ecae 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4325,6 +4325,11 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
 
         trace_ext4_sync_fs(sb, wait);
         flush_workqueue(sbi->dio_unwritten_wq);
+        /*
+         * Writeback quota in non-journalled quota case - journalled quota has
+         * no dirty dquots
+         */
+        dquot_writeback_dquots(sb, -1);
         if (jbd2_journal_start_commit(sbi->s_journal, &target)) {
                 if (wait)
                         jbd2_log_wait_commit(sbi->s_journal, target);
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index c5938c9084b9..70d993a93805 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -201,7 +201,7 @@ static const struct dentry_operations msdos_dentry_operations = {
 
 /***** Get inode using directory and name */
 static struct dentry *msdos_lookup(struct inode *dir, struct dentry *dentry,
-                                   struct nameidata *nd)
+                                   unsigned int flags)
 {
         struct super_block *sb = dir->i_sb;
         struct fat_slot_info sinfo;
@@ -265,7 +265,7 @@ static int msdos_add_entry(struct inode *dir, const unsigned char *name,
 
 /***** Create a file */
 static int msdos_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                        struct nameidata *nd)
+                        bool excl)
 {
         struct super_block *sb = dir->i_sb;
         struct inode *inode = NULL;
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 98ae804f5273..6cc480652433 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -41,9 +41,9 @@ static int vfat_revalidate_shortname(struct dentry *dentry)
         return ret;
 }
 
-static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int vfat_revalidate(struct dentry *dentry, unsigned int flags)
 {
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         /* This is not negative dentry. Always valid. */
@@ -52,9 +52,9 @@ static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd)
         return vfat_revalidate_shortname(dentry);
 }
 
-static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
+static int vfat_revalidate_ci(struct dentry *dentry, unsigned int flags)
 {
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         /*
@@ -74,7 +74,7 @@ static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
          * This may be nfsd (or something), anyway, we can't see the
          * intent of this. So, since this can be for creation, drop it.
          */
-        if (!nd)
+        if (!flags)
                 return 0;
 
         /*
@@ -82,7 +82,7 @@ static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd)
          * case sensitive name which is specified by user if this is
          * for creation.
          */
-        if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+        if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
                 return 0;
 
         return vfat_revalidate_shortname(dentry);
@@ -714,7 +714,7 @@ static int vfat_d_anon_disconn(struct dentry *dentry)
 }
 
 static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry,
-                                  struct nameidata *nd)
+                                  unsigned int flags)
 {
         struct super_block *sb = dir->i_sb;
         struct fat_slot_info sinfo;
@@ -772,7 +772,7 @@ error:
 }
 
 static int vfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                       struct nameidata *nd)
+                       bool excl)
 {
         struct super_block *sb = dir->i_sb;
         struct inode *inode;
diff --git a/fs/file_table.c b/fs/file_table.c
index a305d9e2d1b2..b3fc4d67a26b 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -23,6 +23,8 @@
 #include <linux/lglock.h>
 #include <linux/percpu_counter.h>
 #include <linux/percpu.h>
+#include <linux/hardirq.h>
+#include <linux/task_work.h>
 #include <linux/ima.h>
 
 #include <linux/atomic.h>
@@ -251,7 +253,6 @@ static void __fput(struct file *file)
         }
         fops_put(file->f_op);
         put_pid(file->f_owner.pid);
-        file_sb_list_del(file);
         if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
                 i_readcount_dec(inode);
         if (file->f_mode & FMODE_WRITE)
@@ -263,10 +264,77 @@ static void __fput(struct file *file)
         mntput(mnt);
 }
 
+static DEFINE_SPINLOCK(delayed_fput_lock);
+static LIST_HEAD(delayed_fput_list);
+static void delayed_fput(struct work_struct *unused)
+{
+        LIST_HEAD(head);
+        spin_lock_irq(&delayed_fput_lock);
+        list_splice_init(&delayed_fput_list, &head);
+        spin_unlock_irq(&delayed_fput_lock);
+        while (!list_empty(&head)) {
+                struct file *f = list_first_entry(&head, struct file, f_u.fu_list);
+                list_del_init(&f->f_u.fu_list);
+                __fput(f);
+        }
+}
+
+static void ____fput(struct callback_head *work)
+{
+        __fput(container_of(work, struct file, f_u.fu_rcuhead));
+}
+
+/*
+ * If kernel thread really needs to have the final fput() it has done
+ * to complete, call this.  The only user right now is the boot - we
+ * *do* need to make sure our writes to binaries on initramfs has
+ * not left us with opened struct file waiting for __fput() - execve()
+ * won't work without that.  Please, don't add more callers without
+ * very good reasons; in particular, never call that with locks
+ * held and never call that from a thread that might need to do
+ * some work on any kind of umount.
+ */
+void flush_delayed_fput(void)
+{
+        delayed_fput(NULL);
+}
+
+static DECLARE_WORK(delayed_fput_work, delayed_fput);
+
 void fput(struct file *file)
 {
-        if (atomic_long_dec_and_test(&file->f_count))
+        if (atomic_long_dec_and_test(&file->f_count)) {
+                struct task_struct *task = current;
+                file_sb_list_del(file);
+                if (unlikely(in_interrupt() || task->flags & PF_KTHREAD)) {
+                        unsigned long flags;
+                        spin_lock_irqsave(&delayed_fput_lock, flags);
+                        list_add(&file->f_u.fu_list, &delayed_fput_list);
+                        schedule_work(&delayed_fput_work);
+                        spin_unlock_irqrestore(&delayed_fput_lock, flags);
+                        return;
+                }
+                init_task_work(&file->f_u.fu_rcuhead, ____fput);
+                task_work_add(task, &file->f_u.fu_rcuhead, true);
+        }
+}
+
+/*
+ * synchronous analog of fput(); for kernel threads that might be needed
+ * in some umount() (and thus can't use flush_delayed_fput() without
+ * risking deadlocks), need to wait for completion of __fput() and know
+ * for this specific struct file it won't involve anything that would
+ * need them.  Use only if you really need it - at the very least,
+ * don't blindly convert fput() by kernel thread to that.
+ */
+void __fput_sync(struct file *file)
+{
+        if (atomic_long_dec_and_test(&file->f_count)) {
+                struct task_struct *task = current;
+                file_sb_list_del(file);
+                BUG_ON(!(task->flags & PF_KTHREAD));
                 __fput(file);
+        }
 }
 
 EXPORT_SYMBOL(fput);
@@ -483,10 +551,8 @@ void mark_files_ro(struct super_block *sb)
 {
         struct file *f;
 
-retry:
         lg_global_lock(&files_lglock);
         do_file_list_for_each_entry(sb, f) {
-                struct vfsmount *mnt;
                 if (!S_ISREG(f->f_path.dentry->d_inode->i_mode))
                        continue;
                 if (!file_count(f))
@@ -499,12 +565,7 @@ retry:
                 if (file_check_writeable(f) != 0)
                         continue;
                 file_release_write(f);
-                mnt = mntget(f->f_path.mnt);
-                /* This can sleep, so we can't hold the spinlock. */
-                lg_global_unlock(&files_lglock);
-                mnt_drop_write(mnt);
-                mntput(mnt);
-                goto retry;
+                mnt_drop_write_file(f);
         } while_file_list_for_each_entry;
         lg_global_unlock(&files_lglock);
 }
diff --git a/fs/freevxfs/vxfs_lookup.c b/fs/freevxfs/vxfs_lookup.c
index 3360f1e678ad..bd447e88f208 100644
--- a/fs/freevxfs/vxfs_lookup.c
+++ b/fs/freevxfs/vxfs_lookup.c
@@ -48,7 +48,7 @@
 #define VXFS_BLOCK_PER_PAGE(sbp)  ((PAGE_CACHE_SIZE / (sbp)->s_blocksize))
 
 
-static struct dentry *  vxfs_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *  vxfs_lookup(struct inode *, struct dentry *, unsigned int);
 static int              vxfs_readdir(struct file *, void *, filldir_t);
 
 const struct inode_operations vxfs_dir_inode_ops = {
@@ -203,7 +203,7 @@ vxfs_inode_by_name(struct inode *dip, struct dentry *dp)
  *   in the return pointer.
  */
 static struct dentry *
-vxfs_lookup(struct inode *dip, struct dentry *dp, struct nameidata *nd)
+vxfs_lookup(struct inode *dip, struct dentry *dp, unsigned int flags)
 {
         struct inode            *ip = NULL;
         ino_t                   ino;
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 41a3ccff18d8..8f660dd6137a 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1315,6 +1315,8 @@ void writeback_inodes_sb_nr(struct super_block *sb,
                 .reason                 = reason,
         };
 
+        if (sb->s_bdi == &noop_backing_dev_info)
+                return;
         WARN_ON(!rwsem_is_locked(&sb->s_umount));
         bdi_queue_work(sb->s_bdi, &work);
         wait_for_completion(&done);
@@ -1398,6 +1400,9 @@ void sync_inodes_sb(struct super_block *sb)
                 .reason         = WB_REASON_SYNC,
         };
 
+        /* Nothing to do? */
+        if (sb->s_bdi == &noop_backing_dev_info)
+                return;
         WARN_ON(!rwsem_is_locked(&sb->s_umount));
 
         bdi_queue_work(sb->s_bdi, &work);
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index e159e682ad4c..5df4775fea03 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -6,18 +6,6 @@
 #include <linux/fs_struct.h>
 #include "internal.h"
 
-static inline void path_get_longterm(struct path *path)
-{
-        path_get(path);
-        mnt_make_longterm(path->mnt);
-}
-
-static inline void path_put_longterm(struct path *path)
-{
-        mnt_make_shortterm(path->mnt);
-        path_put(path);
-}
-
 /*
  * Replace the fs->{rootmnt,root} with {mnt,dentry}. Put the old values.
  * It can block.
@@ -26,7 +14,7 @@ void set_fs_root(struct fs_struct *fs, struct path *path)
 {
         struct path old_root;
 
-        path_get_longterm(path);
+        path_get(path);
         spin_lock(&fs->lock);
         write_seqcount_begin(&fs->seq);
         old_root = fs->root;
@@ -34,7 +22,7 @@ void set_fs_root(struct fs_struct *fs, struct path *path)
         write_seqcount_end(&fs->seq);
         spin_unlock(&fs->lock);
         if (old_root.dentry)
-                path_put_longterm(&old_root);
+                path_put(&old_root);
 }
 
 /*
@@ -45,7 +33,7 @@ void set_fs_pwd(struct fs_struct *fs, struct path *path)
 {
         struct path old_pwd;
 
-        path_get_longterm(path);
+        path_get(path);
         spin_lock(&fs->lock);
         write_seqcount_begin(&fs->seq);
         old_pwd = fs->pwd;
@@ -54,7 +42,7 @@ void set_fs_pwd(struct fs_struct *fs, struct path *path)
         spin_unlock(&fs->lock);
 
         if (old_pwd.dentry)
-                path_put_longterm(&old_pwd);
+                path_put(&old_pwd);
 }
 
 static inline int replace_path(struct path *p, const struct path *old, const struct path *new)
@@ -84,7 +72,7 @@ void chroot_fs_refs(struct path *old_root, struct path *new_root)
                         write_seqcount_end(&fs->seq);
                         while (hits--) {
                                 count++;
-                                path_get_longterm(new_root);
+                                path_get(new_root);
                         }
                         spin_unlock(&fs->lock);
                 }
@@ -92,13 +80,13 @@ void chroot_fs_refs(struct path *old_root, struct path *new_root)
         } while_each_thread(g, p);
         read_unlock(&tasklist_lock);
         while (count--)
-                path_put_longterm(old_root);
+                path_put(old_root);
 }
 
 void free_fs_struct(struct fs_struct *fs)
 {
-        path_put_longterm(&fs->root);
-        path_put_longterm(&fs->pwd);
+        path_put(&fs->root);
+        path_put(&fs->pwd);
         kmem_cache_free(fs_cachep, fs);
 }
 
@@ -132,9 +120,9 @@ struct fs_struct *copy_fs_struct(struct fs_struct *old)
 
                 spin_lock(&old->lock);
                 fs->root = old->root;
-                path_get_longterm(&fs->root);
+                path_get(&fs->root);
                 fs->pwd = old->pwd;
-                path_get_longterm(&fs->pwd);
+                path_get(&fs->pwd);
                 spin_unlock(&old->lock);
         }
         return fs;
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 334e0b18a014..8964cf3999b2 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -154,7 +154,7 @@ u64 fuse_get_attr_version(struct fuse_conn *fc)
  * the lookup once more.  If the lookup results in the same inode,
  * then refresh the attributes, timeouts and mark the dentry valid.
  */
-static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
+static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
 {
         struct inode *inode;
 
@@ -174,7 +174,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
                 if (!inode)
                         return 0;
 
-                if (nd && (nd->flags & LOOKUP_RCU))
+                if (flags & LOOKUP_RCU)
                         return -ECHILD;
 
                 fc = get_fuse_conn(inode);
@@ -249,7 +249,7 @@ static struct dentry *fuse_d_add_directory(struct dentry *entry,
                 /* This tries to shrink the subtree below alias */
                 fuse_invalidate_entry(alias);
                 dput(alias);
-                if (!list_empty(&inode->i_dentry))
+                if (!hlist_empty(&inode->i_dentry))
                         return ERR_PTR(-EBUSY);
         } else {
                 dput(alias);
@@ -316,7 +316,7 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
 }
 
 static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
-                                  struct nameidata *nd)
+                                  unsigned int flags)
 {
         int err;
         struct fuse_entry_out outarg;
@@ -370,7 +370,8 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
  * 'mknod' + 'open' requests.
  */
 static int fuse_create_open(struct inode *dir, struct dentry *entry,
-                            umode_t mode, struct nameidata *nd)
+                            struct file *file, unsigned flags,
+                            umode_t mode, int *opened)
 {
         int err;
         struct inode *inode;
@@ -381,15 +382,11 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
         struct fuse_open_out outopen;
         struct fuse_entry_out outentry;
         struct fuse_file *ff;
-        struct file *file;
-        int flags = nd->intent.open.flags;
-
-        if (fc->no_create)
-                return -ENOSYS;
 
         forget = fuse_alloc_forget();
+        err = -ENOMEM;
         if (!forget)
-                return -ENOMEM;
+                goto out_err;
 
         req = fuse_get_req(fc);
         err = PTR_ERR(req);
@@ -428,11 +425,8 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
         req->out.args[1].value = &outopen;
         fuse_request_send(fc, req);
         err = req->out.h.error;
-        if (err) {
-                if (err == -ENOSYS)
-                        fc->no_create = 1;
+        if (err)
                 goto out_free_ff;
-        }
 
         err = -EIO;
         if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))
@@ -448,28 +442,74 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
                 flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
                 fuse_sync_release(ff, flags);
                 fuse_queue_forget(fc, forget, outentry.nodeid, 1);
-                return -ENOMEM;
+                err = -ENOMEM;
+                goto out_err;
         }
         kfree(forget);
         d_instantiate(entry, inode);
         fuse_change_entry_timeout(entry, &outentry);
         fuse_invalidate_attr(dir);
-        file = lookup_instantiate_filp(nd, entry, generic_file_open);
-        if (IS_ERR(file)) {
+        err = finish_open(file, entry, generic_file_open, opened);
+        if (err) {
                 fuse_sync_release(ff, flags);
-                return PTR_ERR(file);
+        } else {
+                file->private_data = fuse_file_get(ff);
+                fuse_finish_open(inode, file);
         }
-        file->private_data = fuse_file_get(ff);
-        fuse_finish_open(inode, file);
-        return 0;
+        return err;
 
- out_free_ff:
+out_free_ff:
         fuse_file_free(ff);
- out_put_request:
+out_put_request:
         fuse_put_request(fc, req);
- out_put_forget_req:
+out_put_forget_req:
         kfree(forget);
+out_err:
+        return err;
+}
+
+static int fuse_mknod(struct inode *, struct dentry *, umode_t, dev_t);
+static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
+                            struct file *file, unsigned flags,
+                            umode_t mode, int *opened)
+{
+        int err;
+        struct fuse_conn *fc = get_fuse_conn(dir);
+        struct dentry *res = NULL;
+
+        if (d_unhashed(entry)) {
+                res = fuse_lookup(dir, entry, 0);
+                if (IS_ERR(res))
+                        return PTR_ERR(res);
+
+                if (res)
+                        entry = res;
+        }
+
+        if (!(flags & O_CREAT) || entry->d_inode)
+                goto no_open;
+
+        /* Only creates */
+        *opened |= FILE_CREATED;
+
+        if (fc->no_create)
+                goto mknod;
+
+        err = fuse_create_open(dir, entry, file, flags, mode, opened);
+        if (err == -ENOSYS) {
+                fc->no_create = 1;
+                goto mknod;
+        }
+out_dput:
+        dput(res);
         return err;
+
+mknod:
+        err = fuse_mknod(dir, entry, mode, 0);
+        if (err)
+                goto out_dput;
+no_open:
+        return finish_no_open(file, res);
 }
 
 /*
@@ -571,14 +611,8 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, umode_t mode,
 }
 
 static int fuse_create(struct inode *dir, struct dentry *entry, umode_t mode,
-                       struct nameidata *nd)
+                       bool excl)
 {
-        if (nd) {
-                int err = fuse_create_open(dir, entry, mode, nd);
-                if (err != -ENOSYS)
-                        return err;
-                /* Fall back on mknod */
-        }
         return fuse_mknod(dir, entry, mode, 0);
 }
 
@@ -1646,6 +1680,7 @@ static const struct inode_operations fuse_dir_inode_operations = {
         .link           = fuse_link,
         .setattr        = fuse_setattr,
         .create         = fuse_create,
+        .atomic_open    = fuse_atomic_open,
         .mknod          = fuse_mknod,
         .permission     = fuse_permission,
         .getattr        = fuse_getattr,
diff --git a/fs/gfs2/dentry.c b/fs/gfs2/dentry.c
index 0da8da2c991d..4fddb3c22d25 100644
--- a/fs/gfs2/dentry.c
+++ b/fs/gfs2/dentry.c
@@ -25,7 +25,7 @@
 /**
  * gfs2_drevalidate - Check directory lookup consistency
  * @dentry: the mapping to check
- * @nd:
+ * @flags: lookup flags
  *
  * Check to make sure the lookup necessary to arrive at this inode from its
  * parent is still good.
@@ -33,7 +33,7 @@
  * Returns: 1 if the dentry is ok, 0 if it isn't
  */
 
-static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
+static int gfs2_drevalidate(struct dentry *dentry, unsigned int flags)
 {
         struct dentry *parent;
         struct gfs2_sbd *sdp;
@@ -44,7 +44,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
         int error;
         int had_lock = 0;
 
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         parent = dget_parent(dentry);
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index a9ba2444e077..867674785fcf 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -755,11 +755,8 @@ fail:
  */
 
 static int gfs2_create(struct inode *dir, struct dentry *dentry,
-                       umode_t mode, struct nameidata *nd)
+                       umode_t mode, bool excl)
 {
-        int excl = 0;
-        if (nd && (nd->flags & LOOKUP_EXCL))
-                excl = 1;
         return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl);
 }
 
@@ -775,7 +772,7 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry,
  */
 
 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
-                                  struct nameidata *nd)
+                                  unsigned int flags)
 {
         struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0);
         if (inode && !IS_ERR(inode)) {
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index b8c250fc4922..6c906078f657 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1286,7 +1286,7 @@ static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
                 error = -EBUSY;
                 goto error_bdev;
         }
-        s = sget(fs_type, test_gfs2_super, set_gfs2_super, bdev);
+        s = sget(fs_type, test_gfs2_super, set_gfs2_super, flags, bdev);
         mutex_unlock(&bdev->bd_fsfreeze_mutex);
         error = PTR_ERR(s);
         if (IS_ERR(s))
@@ -1316,7 +1316,6 @@ static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
         } else {
                 char b[BDEVNAME_SIZE];
 
-                s->s_flags = flags;
                 s->s_mode = mode;
                 strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
                 sb_set_blocksize(s, block_size(bdev));
@@ -1360,7 +1359,7 @@ static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type,
                        dev_name, error);
                 return ERR_PTR(error);
         }
-        s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super,
+        s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags,
                  path.dentry->d_inode->i_sb->s_bdev);
         path_put(&path);
         if (IS_ERR(s)) {
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index b97178e7d397..27b5cc7d6881 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1108,7 +1108,7 @@ void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
         }
 }
 
-int gfs2_quota_sync(struct super_block *sb, int type, int wait)
+int gfs2_quota_sync(struct super_block *sb, int type)
 {
         struct gfs2_sbd *sdp = sb->s_fs_info;
         struct gfs2_quota_data **qda;
@@ -1154,7 +1154,7 @@ int gfs2_quota_sync(struct super_block *sb, int type, int wait)
 
 static int gfs2_quota_sync_timeo(struct super_block *sb, int type)
 {
-        return gfs2_quota_sync(sb, type, 0);
+        return gfs2_quota_sync(sb, type);
 }
 
 int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)
diff --git a/fs/gfs2/quota.h b/fs/gfs2/quota.h
index 90bf1c302a98..f25d98b87904 100644
--- a/fs/gfs2/quota.h
+++ b/fs/gfs2/quota.h
@@ -26,7 +26,7 @@ extern int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid);
 extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
                               u32 uid, u32 gid);
 
-extern int gfs2_quota_sync(struct super_block *sb, int type, int wait);
+extern int gfs2_quota_sync(struct super_block *sb, int type);
 extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id);
 
 extern int gfs2_quota_init(struct gfs2_sbd *sdp);
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 713e621c240b..f3d6bbfb32c5 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -838,7 +838,7 @@ static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
         int error;
 
         flush_workqueue(gfs2_delete_workqueue);
-        gfs2_quota_sync(sdp->sd_vfs, 0, 1);
+        gfs2_quota_sync(sdp->sd_vfs, 0);
         gfs2_statfs_sync(sdp->sd_vfs, 0);
 
         error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
@@ -952,6 +952,8 @@ restart:
 static int gfs2_sync_fs(struct super_block *sb, int wait)
 {
         struct gfs2_sbd *sdp = sb->s_fs_info;
+
+        gfs2_quota_sync(sb, -1);
         if (wait && sdp)
                 gfs2_log_flush(sdp, NULL);
         return 0;
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 9c2592b1d5ff..73ecc34c4342 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -168,7 +168,7 @@ static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
         if (simple_strtol(buf, NULL, 0) != 1)
                 return -EINVAL;
 
-        gfs2_quota_sync(sdp->sd_vfs, 0, 1);
+        gfs2_quota_sync(sdp->sd_vfs, 0);
         return len;
 }
 
diff --git a/fs/hfs/dir.c b/fs/hfs/dir.c
index 62fc14ea4b73..422dde2ec0a1 100644
--- a/fs/hfs/dir.c
+++ b/fs/hfs/dir.c
@@ -18,7 +18,7 @@
  * hfs_lookup()
  */
 static struct dentry *hfs_lookup(struct inode *dir, struct dentry *dentry,
-                                 struct nameidata *nd)
+                                 unsigned int flags)
 {
         hfs_cat_rec rec;
         struct hfs_find_data fd;
@@ -187,7 +187,7 @@ static int hfs_dir_release(struct inode *inode, struct file *file)
  * the directory and the name (and its length) of the new file.
  */
 static int hfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                      struct nameidata *nd)
+                      bool excl)
 {
         struct inode *inode;
         int res;
diff --git a/fs/hfs/extent.c b/fs/hfs/extent.c
index 2c16316d2917..a67955a0c36f 100644
--- a/fs/hfs/extent.c
+++ b/fs/hfs/extent.c
@@ -432,7 +432,7 @@ out:
                 if (inode->i_ino < HFS_FIRSTUSER_CNID)
                         set_bit(HFS_FLG_ALT_MDB_DIRTY, &HFS_SB(sb)->flags);
                 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
-                sb->s_dirt = 1;
+                hfs_mark_mdb_dirty(sb);
         }
         return res;
 
diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h
index 1bf967c6bfdc..8275175acf6e 100644
--- a/fs/hfs/hfs_fs.h
+++ b/fs/hfs/hfs_fs.h
@@ -14,6 +14,7 @@
 #include <linux/mutex.h>
 #include <linux/buffer_head.h>
 #include <linux/fs.h>
+#include <linux/workqueue.h>
 
 #include <asm/byteorder.h>
 #include <asm/uaccess.h>
@@ -137,16 +138,15 @@ struct hfs_sb_info {
         gid_t s_gid;                            /* The gid of all files */
 
         int session, part;
-
         struct nls_table *nls_io, *nls_disk;
-
         struct mutex bitmap_lock;
-
         unsigned long flags;
-
         u16 blockoffset;
-
         int fs_div;
+        struct super_block *sb;
+        int work_queued;                /* non-zero delayed work is queued */
+        struct delayed_work mdb_work;   /* MDB flush delayed work */
+        spinlock_t work_lock;           /* protects mdb_work and work_queued */
 };
 
 #define HFS_FLG_BITMAP_DIRTY    0
@@ -226,6 +226,9 @@ extern int hfs_compare_dentry(const struct dentry *parent,
 extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *);
 extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);
 
+/* super.c */
+extern void hfs_mark_mdb_dirty(struct super_block *sb);
+
 extern struct timezone sys_tz;
 
 /*
@@ -253,7 +256,7 @@ static inline const char *hfs_mdb_name(struct super_block *sb)
 static inline void hfs_bitmap_dirty(struct super_block *sb)
 {
         set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
-        sb->s_dirt = 1;
+        hfs_mark_mdb_dirty(sb);
 }
 
 #define sb_bread512(sb, sec, data) ({                   \
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 761ec06354b4..ee1bc55677f1 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -220,7 +220,7 @@ struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, umode_t mode)
         insert_inode_hash(inode);
         mark_inode_dirty(inode);
         set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
-        sb->s_dirt = 1;
+        hfs_mark_mdb_dirty(sb);
 
         return inode;
 }
@@ -235,7 +235,7 @@ void hfs_delete_inode(struct inode *inode)
                 if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
                         HFS_SB(sb)->root_dirs--;
                 set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
-                sb->s_dirt = 1;
+                hfs_mark_mdb_dirty(sb);
                 return;
         }
         HFS_SB(sb)->file_count--;
@@ -248,7 +248,7 @@ void hfs_delete_inode(struct inode *inode)
                 }
         }
         set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
-        sb->s_dirt = 1;
+        hfs_mark_mdb_dirty(sb);
 }
 
 void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
@@ -489,7 +489,7 @@ out:
 }
 
 static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry,
-                                      struct nameidata *nd)
+                                      unsigned int flags)
 {
         struct inode *inode = NULL;
         hfs_cat_rec rec;
@@ -644,13 +644,7 @@ static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end,
 
         /* sync the superblock to buffers */
         sb = inode->i_sb;
-        if (sb->s_dirt) {
-                lock_super(sb);
-                sb->s_dirt = 0;
-                if (!(sb->s_flags & MS_RDONLY))
-                        hfs_mdb_commit(sb);
-                unlock_super(sb);
-        }
+        flush_delayed_work_sync(&HFS_SB(sb)->mdb_work);
         /* .. finally sync the buffers to disk */
         err = sync_blockdev(sb->s_bdev);
         if (!ret)
diff --git a/fs/hfs/mdb.c b/fs/hfs/mdb.c
index 1563d5ce5764..5fd51a5833ff 100644
--- a/fs/hfs/mdb.c
+++ b/fs/hfs/mdb.c
@@ -260,6 +260,10 @@ void hfs_mdb_commit(struct super_block *sb)
 {
         struct hfs_mdb *mdb = HFS_SB(sb)->mdb;
 
+        if (sb->s_flags & MS_RDONLY)
+                return;
+
+        lock_buffer(HFS_SB(sb)->mdb_bh);
         if (test_and_clear_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags)) {
                 /* These parameters may have been modified, so write them back */
                 mdb->drLsMod = hfs_mtime();
@@ -283,9 +287,13 @@ void hfs_mdb_commit(struct super_block *sb)
                                      &mdb->drXTFlSize, NULL);
                 hfs_inode_write_fork(HFS_SB(sb)->cat_tree->inode, mdb->drCTExtRec,
                                      &mdb->drCTFlSize, NULL);
+
+                lock_buffer(HFS_SB(sb)->alt_mdb_bh);
                 memcpy(HFS_SB(sb)->alt_mdb, HFS_SB(sb)->mdb, HFS_SECTOR_SIZE);
                 HFS_SB(sb)->alt_mdb->drAtrb |= cpu_to_be16(HFS_SB_ATTRIB_UNMNT);
                 HFS_SB(sb)->alt_mdb->drAtrb &= cpu_to_be16(~HFS_SB_ATTRIB_INCNSTNT);
+                unlock_buffer(HFS_SB(sb)->alt_mdb_bh);
+
                 mark_buffer_dirty(HFS_SB(sb)->alt_mdb_bh);
                 sync_dirty_buffer(HFS_SB(sb)->alt_mdb_bh);
         }
@@ -308,7 +316,11 @@ void hfs_mdb_commit(struct super_block *sb)
                                 break;
                         }
                         len = min((int)sb->s_blocksize - off, size);
+
+                        lock_buffer(bh);
                         memcpy(bh->b_data + off, ptr, len);
+                        unlock_buffer(bh);
+
                         mark_buffer_dirty(bh);
                         brelse(bh);
                         block++;
@@ -317,6 +329,7 @@ void hfs_mdb_commit(struct super_block *sb)
                         size -= len;
                 }
         }
+        unlock_buffer(HFS_SB(sb)->mdb_bh);
 }
 
 void hfs_mdb_close(struct super_block *sb)
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index 7b4c537d6e13..4eb873e0c07b 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -29,43 +29,9 @@ static struct kmem_cache *hfs_inode_cachep;
 
 MODULE_LICENSE("GPL");
 
-/*
- * hfs_write_super()
- *
- * Description:
- *   This function is called by the VFS only. When the filesystem
- *   is mounted r/w it updates the MDB on disk.
- * Input Variable(s):
- *   struct super_block *sb: Pointer to the hfs superblock
- * Output Variable(s):
- *   NONE
- * Returns:
- *   void
- * Preconditions:
- *   'sb' points to a "valid" (struct super_block).
- * Postconditions:
- *   The MDB is marked 'unsuccessfully unmounted' by clearing bit 8 of drAtrb
- *   (hfs_put_super() must set this flag!). Some MDB fields are updated
- *   and the MDB buffer is written to disk by calling hfs_mdb_commit().
- */
-static void hfs_write_super(struct super_block *sb)
-{
-        lock_super(sb);
-        sb->s_dirt = 0;
-
-        /* sync everything to the buffers */
-        if (!(sb->s_flags & MS_RDONLY))
-                hfs_mdb_commit(sb);
-        unlock_super(sb);
-}
-
 static int hfs_sync_fs(struct super_block *sb, int wait)
 {
-        lock_super(sb);
         hfs_mdb_commit(sb);
-        sb->s_dirt = 0;
-        unlock_super(sb);
-
         return 0;
 }
 
@@ -78,13 +44,44 @@ static int hfs_sync_fs(struct super_block *sb, int wait)
  */
 static void hfs_put_super(struct super_block *sb)
 {
-        if (sb->s_dirt)
-                hfs_write_super(sb);
+        cancel_delayed_work_sync(&HFS_SB(sb)->mdb_work);
         hfs_mdb_close(sb);
         /* release the MDB's resources */
         hfs_mdb_put(sb);
 }
 
+static void flush_mdb(struct work_struct *work)
+{
+        struct hfs_sb_info *sbi;
+        struct super_block *sb;
+
+        sbi = container_of(work, struct hfs_sb_info, mdb_work.work);
+        sb = sbi->sb;
+
+        spin_lock(&sbi->work_lock);
+        sbi->work_queued = 0;
+        spin_unlock(&sbi->work_lock);
+
+        hfs_mdb_commit(sb);
+}
+
+void hfs_mark_mdb_dirty(struct super_block *sb)
+{
+        struct hfs_sb_info *sbi = HFS_SB(sb);
+        unsigned long delay;
+
+        if (sb->s_flags & MS_RDONLY)
+                return;
+
+        spin_lock(&sbi->work_lock);
+        if (!sbi->work_queued) {
+                delay = msecs_to_jiffies(dirty_writeback_interval * 10);
+                queue_delayed_work(system_long_wq, &sbi->mdb_work, delay);
+                sbi->work_queued = 1;
+        }
+        spin_unlock(&sbi->work_lock);
+}
+
 /*
  * hfs_statfs()
  *
@@ -184,7 +181,6 @@ static const struct super_operations hfs_super_operations = {
         .write_inode    = hfs_write_inode,
         .evict_inode    = hfs_evict_inode,
         .put_super      = hfs_put_super,
-        .write_super    = hfs_write_super,
         .sync_fs        = hfs_sync_fs,
         .statfs         = hfs_statfs,
         .remount_fs     = hfs_remount,
@@ -387,7 +383,10 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent)
         if (!sbi)
                 return -ENOMEM;
 
+        sbi->sb = sb;
         sb->s_fs_info = sbi;
+        spin_lock_init(&sbi->work_lock);
+        INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb);
 
         res = -EINVAL;
         if (!parse_options((char *)data, sbi)) {
diff --git a/fs/hfs/sysdep.c b/fs/hfs/sysdep.c
index 19cf291eb91f..91b91fd3a901 100644
--- a/fs/hfs/sysdep.c
+++ b/fs/hfs/sysdep.c
@@ -13,12 +13,12 @@
 
 /* dentry case-handling: just lowercase everything */
 
-static int hfs_revalidate_dentry(struct dentry *dentry, struct nameidata *nd)
+static int hfs_revalidate_dentry(struct dentry *dentry, unsigned int flags)
 {
         struct inode *inode;
         int diff;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         inode = dentry->d_inode;
diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c
index 1cad80c789cb..4cfbe2edd296 100644
--- a/fs/hfsplus/bitmap.c
+++ b/fs/hfsplus/bitmap.c
@@ -153,7 +153,7 @@ done:
         kunmap(page);
         *max = offset + (curr - pptr) * 32 + i - start;
         sbi->free_blocks -= *max;
-        sb->s_dirt = 1;
+        hfsplus_mark_mdb_dirty(sb);
         dprint(DBG_BITMAP, "-> %u,%u\n", start, *max);
 out:
         mutex_unlock(&sbi->alloc_mutex);
@@ -228,7 +228,7 @@ out:
         set_page_dirty(page);
         kunmap(page);
         sbi->free_blocks += len;
-        sb->s_dirt = 1;
+        hfsplus_mark_mdb_dirty(sb);
         mutex_unlock(&sbi->alloc_mutex);
 
         return 0;
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 26b53fb09f68..6b9f921ef2fa 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -25,7 +25,7 @@ static inline void hfsplus_instantiate(struct dentry *dentry,
 
 /* Find the entry inside dir named dentry->d_name */
 static struct dentry *hfsplus_lookup(struct inode *dir, struct dentry *dentry,
-                                     struct nameidata *nd)
+                                     unsigned int flags)
 {
         struct inode *inode = NULL;
         struct hfs_find_data fd;
@@ -316,7 +316,7 @@ static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir,
         inode->i_ctime = CURRENT_TIME_SEC;
         mark_inode_dirty(inode);
         sbi->file_count++;
-        dst_dir->i_sb->s_dirt = 1;
+        hfsplus_mark_mdb_dirty(dst_dir->i_sb);
 out:
         mutex_unlock(&sbi->vh_mutex);
         return res;
@@ -465,7 +465,7 @@ out:
 }
 
 static int hfsplus_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                          struct nameidata *nd)
+                          bool excl)
 {
         return hfsplus_mknod(dir, dentry, mode, 0);
 }
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index 4e75ac646fea..558dbb463a4e 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -153,8 +153,11 @@ struct hfsplus_sb_info {
         gid_t gid;
 
         int part, session;
-
         unsigned long flags;
+
+        int work_queued;               /* non-zero delayed work is queued */
+        struct delayed_work sync_work; /* FS sync delayed work */
+        spinlock_t work_lock;          /* protects sync_work and work_queued */
 };
 
 #define HFSPLUS_SB_WRITEBACKUP  0
@@ -428,7 +431,7 @@ int hfsplus_show_options(struct seq_file *, struct dentry *);
 
 /* super.c */
 struct inode *hfsplus_iget(struct super_block *, unsigned long);
-int hfsplus_sync_fs(struct super_block *sb, int wait);
+void hfsplus_mark_mdb_dirty(struct super_block *sb);
 
 /* tables.c */
 extern u16 hfsplus_case_fold_table[];
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 82b69ee4dacc..3d8b4a675ba0 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -168,7 +168,7 @@ const struct dentry_operations hfsplus_dentry_operations = {
 };
 
 static struct dentry *hfsplus_file_lookup(struct inode *dir,
-                struct dentry *dentry, struct nameidata *nd)
+                struct dentry *dentry, unsigned int flags)
 {
         struct hfs_find_data fd;
         struct super_block *sb = dir->i_sb;
@@ -431,7 +431,7 @@ struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode)
                 sbi->file_count++;
         insert_inode_hash(inode);
         mark_inode_dirty(inode);
-        sb->s_dirt = 1;
+        hfsplus_mark_mdb_dirty(sb);
 
         return inode;
 }
@@ -442,7 +442,7 @@ void hfsplus_delete_inode(struct inode *inode)
 
         if (S_ISDIR(inode->i_mode)) {
                 HFSPLUS_SB(sb)->folder_count--;
-                sb->s_dirt = 1;
+                hfsplus_mark_mdb_dirty(sb);
                 return;
         }
         HFSPLUS_SB(sb)->file_count--;
@@ -455,7 +455,7 @@ void hfsplus_delete_inode(struct inode *inode)
                 inode->i_size = 0;
                 hfsplus_file_truncate(inode);
         }
-        sb->s_dirt = 1;
+        hfsplus_mark_mdb_dirty(sb);
 }
 
 void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index a9bca4b8768b..473332098013 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -124,7 +124,7 @@ static int hfsplus_system_write_inode(struct inode *inode)
 
         if (fork->total_size != cpu_to_be64(inode->i_size)) {
                 set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags);
-                inode->i_sb->s_dirt = 1;
+                hfsplus_mark_mdb_dirty(inode->i_sb);
         }
         hfsplus_inode_write_fork(inode, fork);
         if (tree)
@@ -161,7 +161,7 @@ static void hfsplus_evict_inode(struct inode *inode)
         }
 }
 
-int hfsplus_sync_fs(struct super_block *sb, int wait)
+static int hfsplus_sync_fs(struct super_block *sb, int wait)
 {
         struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
         struct hfsplus_vh *vhdr = sbi->s_vhdr;
@@ -171,9 +171,7 @@ int hfsplus_sync_fs(struct super_block *sb, int wait)
         if (!wait)
                 return 0;
 
-        dprint(DBG_SUPER, "hfsplus_write_super\n");
-
-        sb->s_dirt = 0;
+        dprint(DBG_SUPER, "hfsplus_sync_fs\n");
 
         /*
          * Explicitly write out the special metadata inodes.
@@ -226,12 +224,34 @@ out:
         return error;
 }
 
-static void hfsplus_write_super(struct super_block *sb)
+static void delayed_sync_fs(struct work_struct *work)
 {
-        if (!(sb->s_flags & MS_RDONLY))
-                hfsplus_sync_fs(sb, 1);
-        else
-                sb->s_dirt = 0;
+        struct hfsplus_sb_info *sbi;
+
+        sbi = container_of(work, struct hfsplus_sb_info, sync_work.work);
+
+        spin_lock(&sbi->work_lock);
+        sbi->work_queued = 0;
+        spin_unlock(&sbi->work_lock);
+
+        hfsplus_sync_fs(sbi->alloc_file->i_sb, 1);
+}
+
+void hfsplus_mark_mdb_dirty(struct super_block *sb)
+{
+        struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
+        unsigned long delay;
+
+        if (sb->s_flags & MS_RDONLY)
+                return;
+
+        spin_lock(&sbi->work_lock);
+        if (!sbi->work_queued) {
+                delay = msecs_to_jiffies(dirty_writeback_interval * 10);
+                queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
+                sbi->work_queued = 1;
+        }
+        spin_unlock(&sbi->work_lock);
 }
 
 static void hfsplus_put_super(struct super_block *sb)
@@ -240,8 +260,7 @@ static void hfsplus_put_super(struct super_block *sb)
 
         dprint(DBG_SUPER, "hfsplus_put_super\n");
 
-        if (!sb->s_fs_info)
-                return;
+        cancel_delayed_work_sync(&sbi->sync_work);
 
         if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) {
                 struct hfsplus_vh *vhdr = sbi->s_vhdr;
@@ -328,7 +347,6 @@ static const struct super_operations hfsplus_sops = {
         .write_inode    = hfsplus_write_inode,
         .evict_inode    = hfsplus_evict_inode,
         .put_super      = hfsplus_put_super,
-        .write_super    = hfsplus_write_super,
         .sync_fs        = hfsplus_sync_fs,
         .statfs         = hfsplus_statfs,
         .remount_fs     = hfsplus_remount,
@@ -355,6 +373,8 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
         sb->s_fs_info = sbi;
         mutex_init(&sbi->alloc_mutex);
         mutex_init(&sbi->vh_mutex);
+        spin_lock_init(&sbi->work_lock);
+        INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
         hfsplus_fill_defaults(sbi);
 
         err = -EINVAL;
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 2afa5bbccf9b..124146543aa7 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -553,7 +553,7 @@ static int read_name(struct inode *ino, char *name)
 }
 
 int hostfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                  struct nameidata *nd)
+                  bool excl)
 {
         struct inode *inode;
         char *name;
@@ -595,7 +595,7 @@ int hostfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 }
 
 struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
-                             struct nameidata *nd)
+                             unsigned int flags)
 {
         struct inode *inode;
         char *name;
diff --git a/fs/hpfs/dir.c b/fs/hpfs/dir.c
index b8472f803f4e..78e12b2e0ea2 100644
--- a/fs/hpfs/dir.c
+++ b/fs/hpfs/dir.c
@@ -189,7 +189,7 @@ out:
  *            to tell read_inode to read fnode or not.
  */
 
-struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index c07ef1f1ced6..ac1ead194db5 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -220,7 +220,7 @@ extern const struct dentry_operations hpfs_dentry_operations;
 
 /* dir.c */
 
-struct dentry *hpfs_lookup(struct inode *, struct dentry *, struct nameidata *);
+struct dentry *hpfs_lookup(struct inode *, struct dentry *, unsigned int);
 extern const struct file_operations hpfs_dir_ops;
 
 /* dnode.c */
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index 9083ef8af58c..bc9082482f68 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -115,7 +115,7 @@ bail:
         return err;
 }
 
-static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
+static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
 {
         const unsigned char *name = dentry->d_name.name;
         unsigned len = dentry->d_name.len;
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index d4f93b52cec5..c1dffe47fde2 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -138,7 +138,7 @@ static int file_removed(struct dentry *dentry, const char *file)
 }
 
 static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
-                                   struct nameidata *nd)
+                                   unsigned int flags)
 {
         struct dentry *proc_dentry, *parent;
         struct qstr *name = &dentry->d_name;
@@ -420,8 +420,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
 {
         const struct cred *cred = file->f_cred;
         struct hppfs_private *data;
-        struct vfsmount *proc_mnt;
-        struct dentry *proc_dentry;
+        struct path path;
         char *host_file;
         int err, fd, type, filter;
 
@@ -434,12 +433,11 @@ static int hppfs_open(struct inode *inode, struct file *file)
         if (host_file == NULL)
                 goto out_free2;
 
-        proc_dentry = HPPFS_I(inode)->proc_dentry;
-        proc_mnt = inode->i_sb->s_fs_info;
+        path.mnt = inode->i_sb->s_fs_info;
+        path.dentry = HPPFS_I(inode)->proc_dentry;
 
         /* XXX This isn't closed anywhere */
-        data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
-                                      file_mode(file->f_mode), cred);
+        data->proc_file = dentry_open(&path, file_mode(file->f_mode), cred);
         err = PTR_ERR(data->proc_file);
         if (IS_ERR(data->proc_file))
                 goto out_free1;
@@ -484,8 +482,7 @@ static int hppfs_dir_open(struct inode *inode, struct file *file)
 {
         const struct cred *cred = file->f_cred;
         struct hppfs_private *data;
-        struct vfsmount *proc_mnt;
-        struct dentry *proc_dentry;
+        struct path path;
         int err;
 
         err = -ENOMEM;
@@ -493,10 +490,9 @@ static int hppfs_dir_open(struct inode *inode, struct file *file)
         if (data == NULL)
                 goto out;
 
-        proc_dentry = HPPFS_I(inode)->proc_dentry;
-        proc_mnt = inode->i_sb->s_fs_info;
-        data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
-                                      file_mode(file->f_mode), cred);
+        path.mnt = inode->i_sb->s_fs_info;
+        path.dentry = HPPFS_I(inode)->proc_dentry;
+        data->proc_file = dentry_open(&path, file_mode(file->f_mode), cred);
         err = PTR_ERR(data->proc_file);
         if (IS_ERR(data->proc_file))
                 goto out_free;
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index cc9281b6c628..e13e9bdb0bf5 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -565,7 +565,7 @@ static int hugetlbfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mod
         return retval;
 }
 
-static int hugetlbfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
+static int hugetlbfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
 {
         return hugetlbfs_mknod(dir, dentry, mode | S_IFREG, 0);
 }
diff --git a/fs/inode.c b/fs/inode.c
index c99163b1b310..775cbabd4fa5 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -182,7 +182,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
         }
         inode->i_private = NULL;
         inode->i_mapping = mapping;
-        INIT_LIST_HEAD(&inode->i_dentry);       /* buggered by rcu freeing */
+        INIT_HLIST_HEAD(&inode->i_dentry);      /* buggered by rcu freeing */
 #ifdef CONFIG_FS_POSIX_ACL
         inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
 #endif
diff --git a/fs/internal.h b/fs/internal.h
index 18bc216ea09d..a6fd56c68b11 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -42,6 +42,11 @@ static inline int __sync_blockdev(struct block_device *bdev, int wait)
 extern void __init chrdev_init(void);
 
 /*
+ * namei.c
+ */
+extern int __inode_permission(struct inode *, int);
+
+/*
  * namespace.c
  */
 extern int copy_mount_options(const void __user *, unsigned long *);
@@ -50,8 +55,6 @@ extern int copy_mount_string(const void __user *, char **);
 extern struct vfsmount *lookup_mnt(struct path *);
 extern int finish_automount(struct vfsmount *, struct path *);
 
-extern void mnt_make_longterm(struct vfsmount *);
-extern void mnt_make_shortterm(struct vfsmount *);
 extern int sb_prepare_remount_readonly(struct super_block *);
 
 extern void __init mnt_init(void);
@@ -84,9 +87,6 @@ extern struct super_block *user_get_super(dev_t);
 /*
  * open.c
  */
-struct nameidata;
-extern struct file *nameidata_to_filp(struct nameidata *);
-extern void release_open_intent(struct nameidata *);
 struct open_flags {
         int open_flag;
         umode_t mode;
diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index 0e73f63d9274..3620ad1ea9bc 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -114,7 +114,7 @@ extern int isofs_name_translate(struct iso_directory_record *, char *, struct in
 int get_joliet_filename(struct iso_directory_record *, unsigned char *, struct inode *);
 int get_acorn_filename(struct iso_directory_record *, char *, struct inode *);
 
-extern struct dentry *isofs_lookup(struct inode *, struct dentry *, struct nameidata *);
+extern struct dentry *isofs_lookup(struct inode *, struct dentry *, unsigned int flags);
 extern struct buffer_head *isofs_bread(struct inode *, sector_t);
 extern int isofs_get_blocks(struct inode *, sector_t, struct buffer_head **, unsigned long);
 
diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
index 1e2946f2a69e..c167028844ed 100644
--- a/fs/isofs/namei.c
+++ b/fs/isofs/namei.c
@@ -163,7 +163,7 @@ isofs_find_entry(struct inode *dir, struct dentry *dentry,
         return 0;
 }
 
-struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         int found;
         unsigned long uninitialized_var(block);
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index b56018896d5e..ad7774d32095 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -25,9 +25,9 @@
 static int jffs2_readdir (struct file *, void *, filldir_t);
 
 static int jffs2_create (struct inode *,struct dentry *,umode_t,
-                         struct nameidata *);
+                         bool);
 static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
-                                    struct nameidata *);
+                                    unsigned int);
 static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
 static int jffs2_unlink (struct inode *,struct dentry *);
 static int jffs2_symlink (struct inode *,struct dentry *,const char *);
@@ -74,7 +74,7 @@ const struct inode_operations jffs2_dir_inode_operations =
    nice and simple
 */
 static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
-                                   struct nameidata *nd)
+                                   unsigned int flags)
 {
         struct jffs2_inode_info *dir_f;
         struct jffs2_full_dirent *fd = NULL, *fd_list;
@@ -175,7 +175,7 @@ static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
 
 
 static int jffs2_create(struct inode *dir_i, struct dentry *dentry,
-                        umode_t mode, struct nameidata *nd)
+                        umode_t mode, bool excl)
 {
         struct jffs2_raw_inode *ri;
         struct jffs2_inode_info *f, *dir_f;
@@ -226,8 +226,8 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry,
                   __func__, inode->i_ino, inode->i_mode, inode->i_nlink,
                   f->inocache->pino_nlink, inode->i_mapping->nrpages);
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
         return 0;
 
  fail:
@@ -446,8 +446,8 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
         mutex_unlock(&dir_f->sem);
         jffs2_complete_reservation(c);
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
         return 0;
 
  fail:
@@ -591,8 +591,8 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, umode_t mode
         mutex_unlock(&dir_f->sem);
         jffs2_complete_reservation(c);
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
         return 0;
 
  fail:
@@ -766,8 +766,8 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, umode_t mode
         mutex_unlock(&dir_f->sem);
         jffs2_complete_reservation(c);
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
         return 0;
 
  fail:
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 07c91ca6017d..3b91a7ad6086 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -73,7 +73,7 @@ static inline void free_ea_wmap(struct inode *inode)
  *
  */
 static int jfs_create(struct inode *dip, struct dentry *dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
         int rc = 0;
         tid_t tid;              /* transaction id */
@@ -176,8 +176,8 @@ static int jfs_create(struct inode *dip, struct dentry *dentry, umode_t mode,
                 unlock_new_inode(ip);
                 iput(ip);
         } else {
-                d_instantiate(dentry, ip);
                 unlock_new_inode(ip);
+                d_instantiate(dentry, ip);
         }
 
       out2:
@@ -309,8 +309,8 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode)
                 unlock_new_inode(ip);
                 iput(ip);
         } else {
-                d_instantiate(dentry, ip);
                 unlock_new_inode(ip);
+                d_instantiate(dentry, ip);
         }
 
       out2:
@@ -1043,8 +1043,8 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry,
                 unlock_new_inode(ip);
                 iput(ip);
         } else {
-                d_instantiate(dentry, ip);
                 unlock_new_inode(ip);
+                d_instantiate(dentry, ip);
         }
 
       out2:
@@ -1424,8 +1424,8 @@ static int jfs_mknod(struct inode *dir, struct dentry *dentry,
                 unlock_new_inode(ip);
                 iput(ip);
         } else {
-                d_instantiate(dentry, ip);
                 unlock_new_inode(ip);
+                d_instantiate(dentry, ip);
         }
 
       out1:
@@ -1436,7 +1436,7 @@ static int jfs_mknod(struct inode *dir, struct dentry *dentry,
         return rc;
 }
 
-static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, unsigned int flags)
 {
         struct btstack btstack;
         ino_t inum;
@@ -1570,7 +1570,7 @@ out:
         return result;
 }
 
-static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int jfs_ci_revalidate(struct dentry *dentry, unsigned int flags)
 {
         /*
          * This is not negative dentry. Always valid.
@@ -1589,7 +1589,7 @@ static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
          * This may be nfsd (or something), anyway, we can't see the
          * intent of this. So, since this can be for creation, drop it.
          */
-        if (!nd)
+        if (!flags)
                 return 0;
 
         /*
@@ -1597,7 +1597,7 @@ static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
          * case sensitive name which is specified by user if this is
          * for creation.
          */
-        if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+        if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
                 return 0;
         return 1;
 }
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 4a82950f412f..c55c7452d285 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -601,6 +601,11 @@ static int jfs_sync_fs(struct super_block *sb, int wait)
 
         /* log == NULL indicates read-only mount */
         if (log) {
+                /*
+                 * Write quota structures to quota file, sync_blockdev() will
+                 * write them to disk later
+                 */
+                dquot_writeback_dquots(sb, -1);
                 jfs_flush_journal(log, wait);
                 jfs_syncpt(log, 0);
         }
diff --git a/fs/libfs.c b/fs/libfs.c
index f86ec27a4230..a74cb1725ac6 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -53,7 +53,7 @@ static int simple_delete_dentry(const struct dentry *dentry)
  * Lookup the data. This is trivial - if the dentry didn't already
  * exist, we know it is negative.  Set d_op to delete negative dentries.
  */
-struct dentry *simple_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry *simple_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         static const struct dentry_operations simple_dentry_operations = {
                 .d_delete = simple_delete_dentry,
@@ -222,15 +222,15 @@ struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name,
         const struct super_operations *ops,
         const struct dentry_operations *dops, unsigned long magic)
 {
-        struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
+        struct super_block *s;
         struct dentry *dentry;
         struct inode *root;
         struct qstr d_name = QSTR_INIT(name, strlen(name));
 
+        s = sget(fs_type, NULL, set_anon_super, MS_NOUSER, NULL);
         if (IS_ERR(s))
                 return ERR_CAST(s);
 
-        s->s_flags = MS_NOUSER;
         s->s_maxbytes = MAX_LFS_FILESIZE;
         s->s_blocksize = PAGE_SIZE;
         s->s_blocksize_bits = PAGE_SHIFT;
diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index bea5d1b9954b..26e4a941532f 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -349,7 +349,7 @@ static void logfs_set_name(struct logfs_disk_dentry *dd, struct qstr *name)
 }
 
 static struct dentry *logfs_lookup(struct inode *dir, struct dentry *dentry,
-                struct nameidata *nd)
+                unsigned int flags)
 {
         struct page *page;
         struct logfs_disk_dentry *dd;
@@ -502,7 +502,7 @@ static int logfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 }
 
 static int logfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
         struct inode *inode;
 
diff --git a/fs/logfs/super.c b/fs/logfs/super.c
index 97bca623d893..345c24b8a6f8 100644
--- a/fs/logfs/super.c
+++ b/fs/logfs/super.c
@@ -519,7 +519,7 @@ static struct dentry *logfs_get_sb_device(struct logfs_super *super,
         log_super("LogFS: Start mount %x\n", mount_count++);
 
         err = -EINVAL;
-        sb = sget(type, logfs_sb_test, logfs_sb_set, super);
+        sb = sget(type, logfs_sb_test, logfs_sb_set, flags | MS_NOATIME, super);
         if (IS_ERR(sb)) {
                 super->s_devops->put_device(super);
                 kfree(super);
@@ -542,7 +542,6 @@ static struct dentry *logfs_get_sb_device(struct logfs_super *super,
         sb->s_maxbytes  = (1ull << 43) - 1;
         sb->s_max_links = LOGFS_LINK_MAX;
         sb->s_op        = &logfs_super_operations;
-        sb->s_flags     = flags | MS_NOATIME;
 
         err = logfs_read_sb(sb, sb->s_flags & MS_RDONLY);
         if (err)
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 2d0ee1786305..0db73d9dd668 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -18,7 +18,7 @@ static int add_nondir(struct dentry *dentry, struct inode *inode)
         return err;
 }
 
-static struct dentry *minix_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *minix_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
 {
         struct inode * inode = NULL;
         ino_t ino;
@@ -55,7 +55,7 @@ static int minix_mknod(struct inode * dir, struct dentry *dentry, umode_t mode,
 }
 
 static int minix_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
         return minix_mknod(dir, dentry, mode, 0);
 }
diff --git a/fs/mount.h b/fs/mount.h
index 4ef36d93e5a2..4f291f9de641 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -22,7 +22,6 @@ struct mount {
         struct vfsmount mnt;
 #ifdef CONFIG_SMP
         struct mnt_pcp __percpu *mnt_pcp;
-        atomic_t mnt_longterm;          /* how many of the refs are longterm */
 #else
         int mnt_count;
         int mnt_writers;
@@ -49,6 +48,8 @@ struct mount {
         int mnt_ghosts;
 };
 
+#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */
+
 static inline struct mount *real_mount(struct vfsmount *mnt)
 {
         return container_of(mnt, struct mount, mnt);
@@ -59,6 +60,12 @@ static inline int mnt_has_parent(struct mount *mnt)
         return mnt != mnt->mnt_parent;
 }
 
+static inline int is_mounted(struct vfsmount *mnt)
+{
+        /* neither detached nor internal? */
+        return !IS_ERR_OR_NULL(real_mount(mnt));
+}
+
 extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
 
 static inline void get_mnt_ns(struct mnt_namespace *ns)
@@ -67,10 +74,12 @@ static inline void get_mnt_ns(struct mnt_namespace *ns)
 }
 
 struct proc_mounts {
-        struct seq_file m; /* must be the first element */
+        struct seq_file m;
         struct mnt_namespace *ns;
         struct path root;
         int (*show)(struct seq_file *, struct vfsmount *);
 };
 
+#define proc_mounts(p) (container_of((p), struct proc_mounts, m))
+
 extern const struct seq_operations mounts_op;
diff --git a/fs/namei.c b/fs/namei.c
index 7d694194024a..2ccc35c4dc24 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -315,31 +315,22 @@ static inline int do_inode_permission(struct inode *inode, int mask)
 }
 
 /**
- * inode_permission  -  check for access rights to a given inode
- * @inode:      inode to check permission on
- * @mask:       right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC, ...)
+ * __inode_permission - Check for access rights to a given inode
+ * @inode: Inode to check permission on
+ * @mask: Right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC)
  *
- * Used to check for read/write/execute permissions on an inode.
- * We use "fsuid" for this, letting us set arbitrary permissions
- * for filesystem access without changing the "normal" uids which
- * are used for other things.
+ * Check for read/write/execute permissions on an inode.
  *
  * When checking for MAY_APPEND, MAY_WRITE must also be set in @mask.
+ *
+ * This does not check for a read-only file system.  You probably want
+ * inode_permission().
  */
-int inode_permission(struct inode *inode, int mask)
+int __inode_permission(struct inode *inode, int mask)
 {
         int retval;
 
         if (unlikely(mask & MAY_WRITE)) {
-                umode_t mode = inode->i_mode;
-
-                /*
-                 * Nobody gets write access to a read-only fs.
-                 */
-                if (IS_RDONLY(inode) &&
-                    (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
-                        return -EROFS;
-
                 /*
                  * Nobody gets write access to an immutable file.
                  */
@@ -359,6 +350,47 @@ int inode_permission(struct inode *inode, int mask)
 }
 
 /**
+ * sb_permission - Check superblock-level permissions
+ * @sb: Superblock of inode to check permission on
+ * @mask: Right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC)
+ *
+ * Separate out file-system wide checks from inode-specific permission checks.
+ */
+static int sb_permission(struct super_block *sb, struct inode *inode, int mask)
+{
+        if (unlikely(mask & MAY_WRITE)) {
+                umode_t mode = inode->i_mode;
+
+                /* Nobody gets write access to a read-only fs. */
+                if ((sb->s_flags & MS_RDONLY) &&
+                    (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
+                        return -EROFS;
+        }
+        return 0;
+}
+
+/**
+ * inode_permission - Check for access rights to a given inode
+ * @inode: Inode to check permission on
+ * @mask: Right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC)
+ *
+ * Check for read/write/execute permissions on an inode.  We use fs[ug]id for
+ * this, letting us set arbitrary permissions for filesystem access without
+ * changing the "normal" UIDs which are used for other things.
+ *
+ * When checking for MAY_APPEND, MAY_WRITE must also be set in @mask.
+ */
+int inode_permission(struct inode *inode, int mask)
+{
+        int retval;
+
+        retval = sb_permission(inode->i_sb, inode, mask);
+        if (retval)
+                return retval;
+        return __inode_permission(inode, mask);
+}
+
+/**
  * path_get - get a reference to a path
  * @path: path to get the reference to
  *
@@ -395,6 +427,18 @@ EXPORT_SYMBOL(path_put);
  * to restart the path walk from the beginning in ref-walk mode.
  */
 
+static inline void lock_rcu_walk(void)
+{
+        br_read_lock(&vfsmount_lock);
+        rcu_read_lock();
+}
+
+static inline void unlock_rcu_walk(void)
+{
+        rcu_read_unlock();
+        br_read_unlock(&vfsmount_lock);
+}
+
 /**
  * unlazy_walk - try to switch to ref-walk mode.
  * @nd: nameidata pathwalk data
@@ -448,8 +492,7 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry)
         }
         mntget(nd->path.mnt);
 
-        rcu_read_unlock();
-        br_read_unlock(&vfsmount_lock);
+        unlock_rcu_walk();
         nd->flags &= ~LOOKUP_RCU;
         return 0;
 
@@ -463,25 +506,9 @@ err_root:
         return -ECHILD;
 }
 
-/**
- * release_open_intent - free up open intent resources
- * @nd: pointer to nameidata
- */
-void release_open_intent(struct nameidata *nd)
+static inline int d_revalidate(struct dentry *dentry, unsigned int flags)
 {
-        struct file *file = nd->intent.open.file;
-
-        if (file && !IS_ERR(file)) {
-                if (file->f_path.dentry == NULL)
-                        put_filp(file);
-                else
-                        fput(file);
-        }
-}
-
-static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd)
-{
-        return dentry->d_op->d_revalidate(dentry, nd);
+        return dentry->d_op->d_revalidate(dentry, flags);
 }
 
 /**
@@ -506,15 +533,13 @@ static int complete_walk(struct nameidata *nd)
                 spin_lock(&dentry->d_lock);
                 if (unlikely(!__d_rcu_to_refcount(dentry, nd->seq))) {
                         spin_unlock(&dentry->d_lock);
-                        rcu_read_unlock();
-                        br_read_unlock(&vfsmount_lock);
+                        unlock_rcu_walk();
                         return -ECHILD;
                 }
                 BUG_ON(nd->inode != dentry->d_inode);
                 spin_unlock(&dentry->d_lock);
                 mntget(nd->path.mnt);
-                rcu_read_unlock();
-                br_read_unlock(&vfsmount_lock);
+                unlock_rcu_walk();
         }
 
         if (likely(!(nd->flags & LOOKUP_JUMPED)))
@@ -527,7 +552,7 @@ static int complete_walk(struct nameidata *nd)
                 return 0;
 
         /* Note: we do not d_invalidate() */
-        status = d_revalidate(dentry, nd);
+        status = d_revalidate(dentry, nd->flags);
         if (status > 0)
                 return 0;
 
@@ -602,10 +627,25 @@ static inline void path_to_nameidata(const struct path *path,
         nd->path.dentry = path->dentry;
 }
 
+/*
+ * Helper to directly jump to a known parsed path from ->follow_link,
+ * caller must have taken a reference to path beforehand.
+ */
+void nd_jump_link(struct nameidata *nd, struct path *path)
+{
+        path_put(&nd->path);
+
+        nd->path = *path;
+        nd->inode = nd->path.dentry->d_inode;
+        nd->flags |= LOOKUP_JUMPED;
+
+        BUG_ON(nd->inode->i_op->follow_link);
+}
+
 static inline void put_link(struct nameidata *nd, struct path *link, void *cookie)
 {
         struct inode *inode = link->dentry->d_inode;
-        if (!IS_ERR(cookie) && inode->i_op->put_link)
+        if (inode->i_op->put_link)
                 inode->i_op->put_link(link->dentry, nd, cookie);
         path_put(link);
 }
@@ -613,19 +653,19 @@ static inline void put_link(struct nameidata *nd, struct path *link, void *cooki
 static __always_inline int
 follow_link(struct path *link, struct nameidata *nd, void **p)
 {
-        int error;
         struct dentry *dentry = link->dentry;
+        int error;
+        char *s;
 
         BUG_ON(nd->flags & LOOKUP_RCU);
 
         if (link->mnt == nd->path.mnt)
                 mntget(link->mnt);
 
-        if (unlikely(current->total_link_count >= 40)) {
-                *p = ERR_PTR(-ELOOP); /* no ->put_link(), please */
-                path_put(&nd->path);
-                return -ELOOP;
-        }
+        error = -ELOOP;
+        if (unlikely(current->total_link_count >= 40))
+                goto out_put_nd_path;
+
         cond_resched();
         current->total_link_count++;
 
@@ -633,30 +673,28 @@ follow_link(struct path *link, struct nameidata *nd, void **p)
         nd_set_link(nd, NULL);
 
         error = security_inode_follow_link(link->dentry, nd);
-        if (error) {
-                *p = ERR_PTR(error); /* no ->put_link(), please */
-                path_put(&nd->path);
-                return error;
-        }
+        if (error)
+                goto out_put_nd_path;
 
         nd->last_type = LAST_BIND;
         *p = dentry->d_inode->i_op->follow_link(dentry, nd);
         error = PTR_ERR(*p);
-        if (!IS_ERR(*p)) {
-                char *s = nd_get_link(nd);
-                error = 0;
-                if (s)
-                        error = __vfs_follow_link(nd, s);
-                else if (nd->last_type == LAST_BIND) {
-                        nd->flags |= LOOKUP_JUMPED;
-                        nd->inode = nd->path.dentry->d_inode;
-                        if (nd->inode->i_op->follow_link) {
-                                /* stepped on a _really_ weird one */
-                                path_put(&nd->path);
-                                error = -ELOOP;
-                        }
-                }
+        if (IS_ERR(*p))
+                goto out_put_nd_path;
+
+        error = 0;
+        s = nd_get_link(nd);
+        if (s) {
+                error = __vfs_follow_link(nd, s);
+                if (unlikely(error))
+                        put_link(nd, link, *p);
         }
+
+        return error;
+
+out_put_nd_path:
+        path_put(&nd->path);
+        path_put(link);
         return error;
 }
 
@@ -675,6 +713,16 @@ static int follow_up_rcu(struct path *path)
         return 1;
 }
 
+/*
+ * follow_up - Find the mountpoint of path's vfsmount
+ *
+ * Given a path, find the mountpoint of its source file system.
+ * Replace @path with the path of the mountpoint in the parent mount.
+ * Up is towards /.
+ *
+ * Return 1 if we went up a level and 0 if we were already at the
+ * root.
+ */
 int follow_up(struct path *path)
 {
         struct mount *mnt = real_mount(path->mnt);
@@ -683,7 +731,7 @@ int follow_up(struct path *path)
 
         br_read_lock(&vfsmount_lock);
         parent = mnt->mnt_parent;
-        if (&parent->mnt == path->mnt) {
+        if (parent == mnt) {
                 br_read_unlock(&vfsmount_lock);
                 return 0;
         }
@@ -946,8 +994,7 @@ failed:
         nd->flags &= ~LOOKUP_RCU;
         if (!(nd->flags & LOOKUP_ROOT))
                 nd->root.mnt = NULL;
-        rcu_read_unlock();
-        br_read_unlock(&vfsmount_lock);
+        unlock_rcu_walk();
         return -ECHILD;
 }
 
@@ -1048,7 +1095,7 @@ static void follow_dotdot(struct nameidata *nd)
  * dir->d_inode->i_mutex must be held
  */
 static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
-                                    struct nameidata *nd, bool *need_lookup)
+                                    unsigned int flags, bool *need_lookup)
 {
         struct dentry *dentry;
         int error;
@@ -1059,7 +1106,7 @@ static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
                 if (d_need_lookup(dentry)) {
                         *need_lookup = true;
                 } else if (dentry->d_flags & DCACHE_OP_REVALIDATE) {
-                        error = d_revalidate(dentry, nd);
+                        error = d_revalidate(dentry, flags);
                         if (unlikely(error <= 0)) {
                                 if (error < 0) {
                                         dput(dentry);
@@ -1089,7 +1136,7 @@ static struct dentry *lookup_dcache(struct qstr *name, struct dentry *dir,
  * dir->d_inode->i_mutex must be held
  */
 static struct dentry *lookup_real(struct inode *dir, struct dentry *dentry,
-                                  struct nameidata *nd)
+                                  unsigned int flags)
 {
         struct dentry *old;
 
@@ -1099,7 +1146,7 @@ static struct dentry *lookup_real(struct inode *dir, struct dentry *dentry,
                 return ERR_PTR(-ENOENT);
         }
 
-        old = dir->i_op->lookup(dir, dentry, nd);
+        old = dir->i_op->lookup(dir, dentry, flags);
         if (unlikely(old)) {
                 dput(dentry);
                 dentry = old;
@@ -1108,16 +1155,16 @@ static struct dentry *lookup_real(struct inode *dir, struct dentry *dentry,
 }
 
 static struct dentry *__lookup_hash(struct qstr *name,
-                struct dentry *base, struct nameidata *nd)
+                struct dentry *base, unsigned int flags)
 {
         bool need_lookup;
         struct dentry *dentry;
 
-        dentry = lookup_dcache(name, base, nd, &need_lookup);
+        dentry = lookup_dcache(name, base, flags, &need_lookup);
         if (!need_lookup)
                 return dentry;
 
-        return lookup_real(base->d_inode, dentry, nd);
+        return lookup_real(base->d_inode, dentry, flags);
 }
 
 /*
@@ -1167,7 +1214,7 @@ static int lookup_fast(struct nameidata *nd, struct qstr *name,
                 if (unlikely(d_need_lookup(dentry)))
                         goto unlazy;
                 if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
-                        status = d_revalidate(dentry, nd);
+                        status = d_revalidate(dentry, nd->flags);
                         if (unlikely(status <= 0)) {
                                 if (status != -ECHILD)
                                         need_reval = 0;
@@ -1197,7 +1244,7 @@ unlazy:
         }
 
         if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE) && need_reval)
-                status = d_revalidate(dentry, nd);
+                status = d_revalidate(dentry, nd->flags);
         if (unlikely(status <= 0)) {
                 if (status < 0) {
                         dput(dentry);
@@ -1236,7 +1283,7 @@ static int lookup_slow(struct nameidata *nd, struct qstr *name,
         BUG_ON(nd->inode != parent->d_inode);
 
         mutex_lock(&parent->d_inode->i_mutex);
-        dentry = __lookup_hash(name, parent, nd);
+        dentry = __lookup_hash(name, parent, nd->flags);
         mutex_unlock(&parent->d_inode->i_mutex);
         if (IS_ERR(dentry))
                 return PTR_ERR(dentry);
@@ -1284,8 +1331,7 @@ static void terminate_walk(struct nameidata *nd)
                 nd->flags &= ~LOOKUP_RCU;
                 if (!(nd->flags & LOOKUP_ROOT))
                         nd->root.mnt = NULL;
-                rcu_read_unlock();
-                br_read_unlock(&vfsmount_lock);
+                unlock_rcu_walk();
         }
 }
 
@@ -1383,9 +1429,10 @@ static inline int nested_symlink(struct path *path, struct nameidata *nd)
                 void *cookie;
 
                 res = follow_link(&link, nd, &cookie);
-                if (!res)
-                        res = walk_component(nd, path, &nd->last,
-                                             nd->last_type, LOOKUP_FOLLOW);
+                if (res)
+                        break;
+                res = walk_component(nd, path, &nd->last,
+                                     nd->last_type, LOOKUP_FOLLOW);
                 put_link(nd, &link, cookie);
         } while (res > 0);
 
@@ -1651,8 +1698,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
                 nd->path = nd->root;
                 nd->inode = inode;
                 if (flags & LOOKUP_RCU) {
-                        br_read_lock(&vfsmount_lock);
-                        rcu_read_lock();
+                        lock_rcu_walk();
                         nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq);
                 } else {
                         path_get(&nd->path);
@@ -1664,8 +1710,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
 
         if (*name=='/') {
                 if (flags & LOOKUP_RCU) {
-                        br_read_lock(&vfsmount_lock);
-                        rcu_read_lock();
+                        lock_rcu_walk();
                         set_root_rcu(nd);
                 } else {
                         set_root(nd);
@@ -1677,8 +1722,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
                         struct fs_struct *fs = current->fs;
                         unsigned seq;
 
-                        br_read_lock(&vfsmount_lock);
-                        rcu_read_lock();
+                        lock_rcu_walk();
 
                         do {
                                 seq = read_seqcount_begin(&fs->seq);
@@ -1713,8 +1757,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
                         if (fput_needed)
                                 *fp = file;
                         nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq);
-                        br_read_lock(&vfsmount_lock);
-                        rcu_read_lock();
+                        lock_rcu_walk();
                 } else {
                         path_get(&file->f_path);
                         fput_light(file, fput_needed);
@@ -1777,8 +1820,9 @@ static int path_lookupat(int dfd, const char *name,
                         struct path link = path;
                         nd->flags |= LOOKUP_PARENT;
                         err = follow_link(&link, nd, &cookie);
-                        if (!err)
-                                err = lookup_last(nd, &path);
+                        if (err)
+                                break;
+                        err = lookup_last(nd, &path);
                         put_link(nd, &link, cookie);
                 }
         }
@@ -1821,9 +1865,27 @@ static int do_path_lookup(int dfd, const char *name,
         return retval;
 }
 
-int kern_path_parent(const char *name, struct nameidata *nd)
+/* does lookup, returns the object with parent locked */
+struct dentry *kern_path_locked(const char *name, struct path *path)
 {
-        return do_path_lookup(AT_FDCWD, name, LOOKUP_PARENT, nd);
+        struct nameidata nd;
+        struct dentry *d;
+        int err = do_path_lookup(AT_FDCWD, name, LOOKUP_PARENT, &nd);
+        if (err)
+                return ERR_PTR(err);
+        if (nd.last_type != LAST_NORM) {
+                path_put(&nd.path);
+                return ERR_PTR(-EINVAL);
+        }
+        mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
+        d = __lookup_hash(&nd.last, nd.path.dentry, 0);
+        if (IS_ERR(d)) {
+                mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+                path_put(&nd.path);
+                return d;
+        }
+        *path = nd.path;
+        return d;
 }
 
 int kern_path(const char *name, unsigned int flags, struct path *path)
@@ -1866,7 +1928,7 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt,
  */
 static struct dentry *lookup_hash(struct nameidata *nd)
 {
-        return __lookup_hash(&nd->last, nd->path.dentry, nd);
+        return __lookup_hash(&nd->last, nd->path.dentry, nd->flags);
 }
 
 /**
@@ -1913,7 +1975,7 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
         if (err)
                 return ERR_PTR(err);
 
-        return __lookup_hash(&this, base, NULL);
+        return __lookup_hash(&this, base, 0);
 }
 
 int user_path_at_empty(int dfd, const char __user *name, unsigned flags,
@@ -2086,10 +2148,9 @@ void unlock_rename(struct dentry *p1, struct dentry *p2)
 }
 
 int vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                struct nameidata *nd)
+                bool want_excl)
 {
         int error = may_create(dir, dentry);
-
         if (error)
                 return error;
 
@@ -2100,7 +2161,7 @@ int vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
         error = security_inode_create(dir, dentry, mode);
         if (error)
                 return error;
-        error = dir->i_op->create(dir, dentry, mode, nd);
+        error = dir->i_op->create(dir, dentry, mode, want_excl);
         if (!error)
                 fsnotify_create(dir, dentry);
         return error;
@@ -2187,21 +2248,275 @@ static inline int open_to_namei_flags(int flag)
         return flag;
 }
 
+static int may_o_create(struct path *dir, struct dentry *dentry, umode_t mode)
+{
+        int error = security_path_mknod(dir, dentry, mode, 0);
+        if (error)
+                return error;
+
+        error = inode_permission(dir->dentry->d_inode, MAY_WRITE | MAY_EXEC);
+        if (error)
+                return error;
+
+        return security_inode_create(dir->dentry->d_inode, dentry, mode);
+}
+
 /*
- * Handle the last step of open()
+ * Attempt to atomically look up, create and open a file from a negative
+ * dentry.
+ *
+ * Returns 0 if successful.  The file will have been created and attached to
+ * @file by the filesystem calling finish_open().
+ *
+ * Returns 1 if the file was looked up only or didn't need creating.  The
+ * caller will need to perform the open themselves.  @path will have been
+ * updated to point to the new dentry.  This may be negative.
+ *
+ * Returns an error code otherwise.
+ */
+static int atomic_open(struct nameidata *nd, struct dentry *dentry,
+                        struct path *path, struct file *file,
+                        const struct open_flags *op,
+                        bool *want_write, bool need_lookup,
+                        int *opened)
+{
+        struct inode *dir =  nd->path.dentry->d_inode;
+        unsigned open_flag = open_to_namei_flags(op->open_flag);
+        umode_t mode;
+        int error;
+        int acc_mode;
+        int create_error = 0;
+        struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
+
+        BUG_ON(dentry->d_inode);
+
+        /* Don't create child dentry for a dead directory. */
+        if (unlikely(IS_DEADDIR(dir))) {
+                error = -ENOENT;
+                goto out;
+        }
+
+        mode = op->mode & S_IALLUGO;
+        if ((open_flag & O_CREAT) && !IS_POSIXACL(dir))
+                mode &= ~current_umask();
+
+        if (open_flag & O_EXCL) {
+                open_flag &= ~O_TRUNC;
+                *opened |= FILE_CREATED;
+        }
+
+        /*
+         * Checking write permission is tricky, bacuse we don't know if we are
+         * going to actually need it: O_CREAT opens should work as long as the
+         * file exists.  But checking existence breaks atomicity.  The trick is
+         * to check access and if not granted clear O_CREAT from the flags.
+         *
+         * Another problem is returing the "right" error value (e.g. for an
+         * O_EXCL open we want to return EEXIST not EROFS).
+         */
+        if ((open_flag & (O_CREAT | O_TRUNC)) ||
+            (open_flag & O_ACCMODE) != O_RDONLY) {
+                error = mnt_want_write(nd->path.mnt);
+                if (!error) {
+                        *want_write = true;
+                } else if (!(open_flag & O_CREAT)) {
+                        /*
+                         * No O_CREATE -> atomicity not a requirement -> fall
+                         * back to lookup + open
+                         */
+                        goto no_open;
+                } else if (open_flag & (O_EXCL | O_TRUNC)) {
+                        /* Fall back and fail with the right error */
+                        create_error = error;
+                        goto no_open;
+                } else {
+                        /* No side effects, safe to clear O_CREAT */
+                        create_error = error;
+                        open_flag &= ~O_CREAT;
+                }
+        }
+
+        if (open_flag & O_CREAT) {
+                error = may_o_create(&nd->path, dentry, op->mode);
+                if (error) {
+                        create_error = error;
+                        if (open_flag & O_EXCL)
+                                goto no_open;
+                        open_flag &= ~O_CREAT;
+                }
+        }
+
+        if (nd->flags & LOOKUP_DIRECTORY)
+                open_flag |= O_DIRECTORY;
+
+        file->f_path.dentry = DENTRY_NOT_SET;
+        file->f_path.mnt = nd->path.mnt;
+        error = dir->i_op->atomic_open(dir, dentry, file, open_flag, mode,
+                                      opened);
+        if (error < 0) {
+                if (create_error && error == -ENOENT)
+                        error = create_error;
+                goto out;
+        }
+
+        acc_mode = op->acc_mode;
+        if (*opened & FILE_CREATED) {
+                fsnotify_create(dir, dentry);
+                acc_mode = MAY_OPEN;
+        }
+
+        if (error) {    /* returned 1, that is */
+                if (WARN_ON(file->f_path.dentry == DENTRY_NOT_SET)) {
+                        error = -EIO;
+                        goto out;
+                }
+                if (file->f_path.dentry) {
+                        dput(dentry);
+                        dentry = file->f_path.dentry;
+                }
+                goto looked_up;
+        }
+
+        /*
+         * We didn't have the inode before the open, so check open permission
+         * here.
+         */
+        error = may_open(&file->f_path, acc_mode, open_flag);
+        if (error)
+                fput(file);
+
+out:
+        dput(dentry);
+        return error;
+
+no_open:
+        if (need_lookup) {
+                dentry = lookup_real(dir, dentry, nd->flags);
+                if (IS_ERR(dentry))
+                        return PTR_ERR(dentry);
+
+                if (create_error) {
+                        int open_flag = op->open_flag;
+
+                        error = create_error;
+                        if ((open_flag & O_EXCL)) {
+                                if (!dentry->d_inode)
+                                        goto out;
+                        } else if (!dentry->d_inode) {
+                                goto out;
+                        } else if ((open_flag & O_TRUNC) &&
+                                   S_ISREG(dentry->d_inode->i_mode)) {
+                                goto out;
+                        }
+                        /* will fail later, go on to get the right error */
+                }
+        }
+looked_up:
+        path->dentry = dentry;
+        path->mnt = nd->path.mnt;
+        return 1;
+}
+
+/*
+ * Look up and maybe create and open the last component.
+ *
+ * Must be called with i_mutex held on parent.
+ *
+ * Returns 0 if the file was successfully atomically created (if necessary) and
+ * opened.  In this case the file will be returned attached to @file.
+ *
+ * Returns 1 if the file was not completely opened at this time, though lookups
+ * and creations will have been performed and the dentry returned in @path will
+ * be positive upon return if O_CREAT was specified.  If O_CREAT wasn't
+ * specified then a negative dentry may be returned.
+ *
+ * An error code is returned otherwise.
+ *
+ * FILE_CREATE will be set in @*opened if the dentry was created and will be
+ * cleared otherwise prior to returning.
  */
-static struct file *do_last(struct nameidata *nd, struct path *path,
-                            const struct open_flags *op, const char *pathname)
+static int lookup_open(struct nameidata *nd, struct path *path,
+                        struct file *file,
+                        const struct open_flags *op,
+                        bool *want_write, int *opened)
 {
         struct dentry *dir = nd->path.dentry;
+        struct inode *dir_inode = dir->d_inode;
         struct dentry *dentry;
+        int error;
+        bool need_lookup;
+
+        *opened &= ~FILE_CREATED;
+        dentry = lookup_dcache(&nd->last, dir, nd->flags, &need_lookup);
+        if (IS_ERR(dentry))
+                return PTR_ERR(dentry);
+
+        /* Cached positive dentry: will open in f_op->open */
+        if (!need_lookup && dentry->d_inode)
+                goto out_no_open;
+
+        if ((nd->flags & LOOKUP_OPEN) && dir_inode->i_op->atomic_open) {
+                return atomic_open(nd, dentry, path, file, op, want_write,
+                                   need_lookup, opened);
+        }
+
+        if (need_lookup) {
+                BUG_ON(dentry->d_inode);
+
+                dentry = lookup_real(dir_inode, dentry, nd->flags);
+                if (IS_ERR(dentry))
+                        return PTR_ERR(dentry);
+        }
+
+        /* Negative dentry, just create the file */
+        if (!dentry->d_inode && (op->open_flag & O_CREAT)) {
+                umode_t mode = op->mode;
+                if (!IS_POSIXACL(dir->d_inode))
+                        mode &= ~current_umask();
+                /*
+                 * This write is needed to ensure that a
+                 * rw->ro transition does not occur between
+                 * the time when the file is created and when
+                 * a permanent write count is taken through
+                 * the 'struct file' in finish_open().
+                 */
+                error = mnt_want_write(nd->path.mnt);
+                if (error)
+                        goto out_dput;
+                *want_write = true;
+                *opened |= FILE_CREATED;
+                error = security_path_mknod(&nd->path, dentry, mode, 0);
+                if (error)
+                        goto out_dput;
+                error = vfs_create(dir->d_inode, dentry, mode,
+                                   nd->flags & LOOKUP_EXCL);
+                if (error)
+                        goto out_dput;
+        }
+out_no_open:
+        path->dentry = dentry;
+        path->mnt = nd->path.mnt;
+        return 1;
+
+out_dput:
+        dput(dentry);
+        return error;
+}
+
+/*
+ * Handle the last step of open()
+ */
+static int do_last(struct nameidata *nd, struct path *path,
+                   struct file *file, const struct open_flags *op,
+                   int *opened, const char *pathname)
+{
+        struct dentry *dir = nd->path.dentry;
         int open_flag = op->open_flag;
-        int will_truncate = open_flag & O_TRUNC;
-        int want_write = 0;
+        bool will_truncate = (open_flag & O_TRUNC) != 0;
+        bool want_write = false;
         int acc_mode = op->acc_mode;
-        struct file *filp;
         struct inode *inode;
-        int symlink_ok = 0;
+        bool symlink_ok = false;
         struct path save_parent = { .dentry = NULL, .mnt = NULL };
         bool retried = false;
         int error;
@@ -2214,112 +2529,99 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
         case LAST_DOT:
                 error = handle_dots(nd, nd->last_type);
                 if (error)
-                        return ERR_PTR(error);
+                        return error;
                 /* fallthrough */
         case LAST_ROOT:
                 error = complete_walk(nd);
                 if (error)
-                        return ERR_PTR(error);
+                        return error;
                 audit_inode(pathname, nd->path.dentry);
                 if (open_flag & O_CREAT) {
                         error = -EISDIR;
-                        goto exit;
+                        goto out;
                 }
-                goto ok;
+                goto finish_open;
         case LAST_BIND:
                 error = complete_walk(nd);
                 if (error)
-                        return ERR_PTR(error);
+                        return error;
                 audit_inode(pathname, dir);
-                goto ok;
+                goto finish_open;
         }
 
         if (!(open_flag & O_CREAT)) {
                 if (nd->last.name[nd->last.len])
                         nd->flags |= LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
                 if (open_flag & O_PATH && !(nd->flags & LOOKUP_FOLLOW))
-                        symlink_ok = 1;
+                        symlink_ok = true;
                 /* we _can_ be in RCU mode here */
                 error = lookup_fast(nd, &nd->last, path, &inode);
-                if (unlikely(error)) {
-                        if (error < 0)
-                                goto exit;
+                if (likely(!error))
+                        goto finish_lookup;
 
-                        error = lookup_slow(nd, &nd->last, path);
-                        if (error < 0)
-                                goto exit;
+                if (error < 0)
+                        goto out;
 
-                        inode = path->dentry->d_inode;
-                }
-                goto finish_lookup;
-        }
-
-        /* create side of things */
-        /*
-         * This will *only* deal with leaving RCU mode - LOOKUP_JUMPED has been
-         * cleared when we got to the last component we are about to look up
-         */
-        error = complete_walk(nd);
-        if (error)
-                return ERR_PTR(error);
+                BUG_ON(nd->inode != dir->d_inode);
+        } else {
+                /* create side of things */
+                /*
+                 * This will *only* deal with leaving RCU mode - LOOKUP_JUMPED
+                 * has been cleared when we got to the last component we are
+                 * about to look up
+                 */
+                error = complete_walk(nd);
+                if (error)
+                        return error;
 
-        audit_inode(pathname, dir);
-        error = -EISDIR;
-        /* trailing slashes? */
-        if (nd->last.name[nd->last.len])
-                goto exit;
+                audit_inode(pathname, dir);
+                error = -EISDIR;
+                /* trailing slashes? */
+                if (nd->last.name[nd->last.len])
+                        goto out;
+        }
 
 retry_lookup:
         mutex_lock(&dir->d_inode->i_mutex);
+        error = lookup_open(nd, path, file, op, &want_write, opened);
+        mutex_unlock(&dir->d_inode->i_mutex);
 
-        dentry = lookup_hash(nd);
-        error = PTR_ERR(dentry);
-        if (IS_ERR(dentry)) {
-                mutex_unlock(&dir->d_inode->i_mutex);
-                goto exit;
-        }
+        if (error <= 0) {
+                if (error)
+                        goto out;
 
-        path->dentry = dentry;
-        path->mnt = nd->path.mnt;
+                if ((*opened & FILE_CREATED) ||
+                    !S_ISREG(file->f_path.dentry->d_inode->i_mode))
+                        will_truncate = false;
 
-        /* Negative dentry, just create the file */
-        if (!dentry->d_inode) {
-                umode_t mode = op->mode;
-                if (!IS_POSIXACL(dir->d_inode))
-                        mode &= ~current_umask();
-                /*
-                 * This write is needed to ensure that a
-                 * rw->ro transition does not occur between
-                 * the time when the file is created and when
-                 * a permanent write count is taken through
-                 * the 'struct file' in nameidata_to_filp().
-                 */
-                error = mnt_want_write(nd->path.mnt);
-                if (error)
-                        goto exit_mutex_unlock;
-                want_write = 1;
+                audit_inode(pathname, file->f_path.dentry);
+                goto opened;
+        }
+
+        if (*opened & FILE_CREATED) {
                 /* Don't check for write permission, don't truncate */
                 open_flag &= ~O_TRUNC;
-                will_truncate = 0;
+                will_truncate = false;
                 acc_mode = MAY_OPEN;
-                error = security_path_mknod(&nd->path, dentry, mode, 0);
-                if (error)
-                        goto exit_mutex_unlock;
-                error = vfs_create(dir->d_inode, dentry, mode, nd);
-                if (error)
-                        goto exit_mutex_unlock;
-                mutex_unlock(&dir->d_inode->i_mutex);
-                dput(nd->path.dentry);
-                nd->path.dentry = dentry;
-                goto common;
+                path_to_nameidata(path, nd);
+                goto finish_open_created;
         }
 
         /*
          * It already exists.
          */
-        mutex_unlock(&dir->d_inode->i_mutex);
         audit_inode(pathname, path->dentry);
 
+        /*
+         * If atomic_open() acquired write access it is dropped now due to
+         * possible mount and symlink following (this might be optimized away if
+         * necessary...)
+         */
+        if (want_write) {
+                mnt_drop_write(nd->path.mnt);
+                want_write = false;
+        }
+
         error = -EEXIST;
         if (open_flag & O_EXCL)
                 goto exit_dput;
@@ -2338,18 +2640,18 @@ finish_lookup:
         error = -ENOENT;
         if (!inode) {
                 path_to_nameidata(path, nd);
-                goto exit;
+                goto out;
         }
 
         if (should_follow_link(inode, !symlink_ok)) {
                 if (nd->flags & LOOKUP_RCU) {
                         if (unlikely(unlazy_walk(nd, path->dentry))) {
                                 error = -ECHILD;
-                                goto exit;
+                                goto out;
                         }
                 }
                 BUG_ON(inode != path->dentry->d_inode);
-                return NULL;
+                return 1;
         }
 
         if ((nd->flags & LOOKUP_RCU) || nd->path.mnt != path->mnt) {
@@ -2365,119 +2667,122 @@ finish_lookup:
         error = complete_walk(nd);
         if (error) {
                 path_put(&save_parent);
-                return ERR_PTR(error);
+                return error;
         }
         error = -EISDIR;
         if ((open_flag & O_CREAT) && S_ISDIR(nd->inode->i_mode))
-                goto exit;
+                goto out;
         error = -ENOTDIR;
         if ((nd->flags & LOOKUP_DIRECTORY) && !nd->inode->i_op->lookup)
-                goto exit;
+                goto out;
         audit_inode(pathname, nd->path.dentry);
-ok:
+finish_open:
         if (!S_ISREG(nd->inode->i_mode))
-                will_truncate = 0;
+                will_truncate = false;
 
         if (will_truncate) {
                 error = mnt_want_write(nd->path.mnt);
                 if (error)
-                        goto exit;
-                want_write = 1;
+                        goto out;
+                want_write = true;
         }
-common:
+finish_open_created:
         error = may_open(&nd->path, acc_mode, open_flag);
         if (error)
-                goto exit;
-        filp = nameidata_to_filp(nd);
-        if (filp == ERR_PTR(-EOPENSTALE) && save_parent.dentry && !retried) {
-                BUG_ON(save_parent.dentry != dir);
-                path_put(&nd->path);
-                nd->path = save_parent;
-                nd->inode = dir->d_inode;
-                save_parent.mnt = NULL;
-                save_parent.dentry = NULL;
-                if (want_write) {
-                        mnt_drop_write(nd->path.mnt);
-                        want_write = 0;
-                }
-                retried = true;
-                goto retry_lookup;
-        }
-        if (!IS_ERR(filp)) {
-                error = ima_file_check(filp, op->acc_mode);
-                if (error) {
-                        fput(filp);
-                        filp = ERR_PTR(error);
-                }
+                goto out;
+        file->f_path.mnt = nd->path.mnt;
+        error = finish_open(file, nd->path.dentry, NULL, opened);
+        if (error) {
+                if (error == -EOPENSTALE)
+                        goto stale_open;
+                goto out;
         }
-        if (!IS_ERR(filp)) {
-                if (will_truncate) {
-                        error = handle_truncate(filp);
-                        if (error) {
-                                fput(filp);
-                                filp = ERR_PTR(error);
-                        }
-                }
+opened:
+        error = open_check_o_direct(file);
+        if (error)
+                goto exit_fput;
+        error = ima_file_check(file, op->acc_mode);
+        if (error)
+                goto exit_fput;
+
+        if (will_truncate) {
+                error = handle_truncate(file);
+                if (error)
+                        goto exit_fput;
         }
 out:
         if (want_write)
                 mnt_drop_write(nd->path.mnt);
         path_put(&save_parent);
         terminate_walk(nd);
-        return filp;
+        return error;
 
-exit_mutex_unlock:
-        mutex_unlock(&dir->d_inode->i_mutex);
 exit_dput:
         path_put_conditional(path, nd);
-exit:
-        filp = ERR_PTR(error);
         goto out;
+exit_fput:
+        fput(file);
+        goto out;
+
+stale_open:
+        /* If no saved parent or already retried then can't retry */
+        if (!save_parent.dentry || retried)
+                goto out;
+
+        BUG_ON(save_parent.dentry != dir);
+        path_put(&nd->path);
+        nd->path = save_parent;
+        nd->inode = dir->d_inode;
+        save_parent.mnt = NULL;
+        save_parent.dentry = NULL;
+        if (want_write) {
+                mnt_drop_write(nd->path.mnt);
+                want_write = false;
+        }
+        retried = true;
+        goto retry_lookup;
 }
 
 static struct file *path_openat(int dfd, const char *pathname,
                 struct nameidata *nd, const struct open_flags *op, int flags)
 {
         struct file *base = NULL;
-        struct file *filp;
+        struct file *file;
         struct path path;
+        int opened = 0;
         int error;
 
-        filp = get_empty_filp();
-        if (!filp)
+        file = get_empty_filp();
+        if (!file)
                 return ERR_PTR(-ENFILE);
 
-        filp->f_flags = op->open_flag;
-        nd->intent.open.file = filp;
-        nd->intent.open.flags = open_to_namei_flags(op->open_flag);
-        nd->intent.open.create_mode = op->mode;
+        file->f_flags = op->open_flag;
 
         error = path_init(dfd, pathname, flags | LOOKUP_PARENT, nd, &base);
         if (unlikely(error))
-                goto out_filp;
+                goto out;
 
         current->total_link_count = 0;
         error = link_path_walk(pathname, nd);
         if (unlikely(error))
-                goto out_filp;
+                goto out;
 
-        filp = do_last(nd, &path, op, pathname);
-        while (unlikely(!filp)) { /* trailing symlink */
+        error = do_last(nd, &path, file, op, &opened, pathname);
+        while (unlikely(error > 0)) { /* trailing symlink */
                 struct path link = path;
                 void *cookie;
                 if (!(nd->flags & LOOKUP_FOLLOW)) {
                         path_put_conditional(&path, nd);
                         path_put(&nd->path);
-                        filp = ERR_PTR(-ELOOP);
+                        error = -ELOOP;
                         break;
                 }
                 nd->flags |= LOOKUP_PARENT;
                 nd->flags &= ~(LOOKUP_OPEN|LOOKUP_CREATE|LOOKUP_EXCL);
                 error = follow_link(&link, nd, &cookie);
                 if (unlikely(error))
-                        filp = ERR_PTR(error);
-                else
-                        filp = do_last(nd, &path, op, pathname);
+                        break;
+                error = do_last(nd, &path, file, op, &opened, pathname);
                 put_link(nd, &link, cookie);
         }
 out:
@@ -2485,18 +2790,20 @@ out:
                 path_put(&nd->root);
         if (base)
                 fput(base);
-        release_open_intent(nd);
-        if (filp == ERR_PTR(-EOPENSTALE)) {
-                if (flags & LOOKUP_RCU)
-                        filp = ERR_PTR(-ECHILD);
-                else
-                        filp = ERR_PTR(-ESTALE);
+        if (!(opened & FILE_OPENED)) {
+                BUG_ON(!error);
+                put_filp(file);
         }
-        return filp;
-
-out_filp:
-        filp = ERR_PTR(error);
-        goto out;
+        if (unlikely(error)) {
+                if (error == -EOPENSTALE) {
+                        if (flags & LOOKUP_RCU)
+                                error = -ECHILD;
+                        else
+                                error = -ESTALE;
+                }
+                file = ERR_PTR(error);
+        }
+        return file;
 }
 
 struct file *do_filp_open(int dfd, const char *pathname,
@@ -2551,7 +2858,6 @@ struct dentry *kern_path_create(int dfd, const char *pathname, struct path *path
                 goto out;
         nd.flags &= ~LOOKUP_PARENT;
         nd.flags |= LOOKUP_CREATE | LOOKUP_EXCL;
-        nd.intent.open.flags = O_EXCL;
 
         /*
          * Do the final lookup.
@@ -2670,7 +2976,7 @@ SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, umode_t, mode,
                 goto out_drop_write;
         switch (mode & S_IFMT) {
                 case 0: case S_IFREG:
-                        error = vfs_create(path.dentry->d_inode,dentry,mode,NULL);
+                        error = vfs_create(path.dentry->d_inode,dentry,mode,true);
                         break;
                 case S_IFCHR: case S_IFBLK:
                         error = vfs_mknod(path.dentry->d_inode,dentry,mode,
diff --git a/fs/namespace.c b/fs/namespace.c
index 1e4a5fe3d7b7..c53d3381b0d0 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -515,8 +515,20 @@ struct mount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry,
 }
 
 /*
- * lookup_mnt increments the ref count before returning
- * the vfsmount struct.
+ * lookup_mnt - Return the first child mount mounted at path
+ *
+ * "First" means first mounted chronologically.  If you create the
+ * following mounts:
+ *
+ * mount /dev/sda1 /mnt
+ * mount /dev/sda2 /mnt
+ * mount /dev/sda3 /mnt
+ *
+ * Then lookup_mnt() on the base /mnt dentry in the root mount will
+ * return successively the root dentry and vfsmount of /dev/sda1, then
+ * /dev/sda2, then /dev/sda3, then NULL.
+ *
+ * lookup_mnt takes a reference to the found vfsmount.
  */
 struct vfsmount *lookup_mnt(struct path *path)
 {
@@ -621,21 +633,6 @@ static void attach_mnt(struct mount *mnt, struct path *path)
         list_add_tail(&mnt->mnt_child, &real_mount(path->mnt)->mnt_mounts);
 }
 
-static inline void __mnt_make_longterm(struct mount *mnt)
-{
-#ifdef CONFIG_SMP
-        atomic_inc(&mnt->mnt_longterm);
-#endif
-}
-
-/* needs vfsmount lock for write */
-static inline void __mnt_make_shortterm(struct mount *mnt)
-{
-#ifdef CONFIG_SMP
-        atomic_dec(&mnt->mnt_longterm);
-#endif
-}
-
 /*
  * vfsmount lock must be held for write
  */
@@ -649,10 +646,8 @@ static void commit_tree(struct mount *mnt)
         BUG_ON(parent == mnt);
 
         list_add_tail(&head, &mnt->mnt_list);
-        list_for_each_entry(m, &head, mnt_list) {
+        list_for_each_entry(m, &head, mnt_list)
                 m->mnt_ns = n;
-                __mnt_make_longterm(m);
-        }
 
         list_splice(&head, n->list.prev);
 
@@ -725,56 +720,60 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
                                         int flag)
 {
         struct super_block *sb = old->mnt.mnt_sb;
-        struct mount *mnt = alloc_vfsmnt(old->mnt_devname);
+        struct mount *mnt;
+        int err;
 
-        if (mnt) {
-                if (flag & (CL_SLAVE | CL_PRIVATE))
-                        mnt->mnt_group_id = 0; /* not a peer of original */
-                else
-                        mnt->mnt_group_id = old->mnt_group_id;
-
-                if ((flag & CL_MAKE_SHARED) && !mnt->mnt_group_id) {
-                        int err = mnt_alloc_group_id(mnt);
-                        if (err)
-                                goto out_free;
-                }
+        mnt = alloc_vfsmnt(old->mnt_devname);
+        if (!mnt)
+                return ERR_PTR(-ENOMEM);
 
-                mnt->mnt.mnt_flags = old->mnt.mnt_flags & ~MNT_WRITE_HOLD;
-                atomic_inc(&sb->s_active);
-                mnt->mnt.mnt_sb = sb;
-                mnt->mnt.mnt_root = dget(root);
-                mnt->mnt_mountpoint = mnt->mnt.mnt_root;
-                mnt->mnt_parent = mnt;
-                br_write_lock(&vfsmount_lock);
-                list_add_tail(&mnt->mnt_instance, &sb->s_mounts);
-                br_write_unlock(&vfsmount_lock);
+        if (flag & (CL_SLAVE | CL_PRIVATE))
+                mnt->mnt_group_id = 0; /* not a peer of original */
+        else
+                mnt->mnt_group_id = old->mnt_group_id;
 
-                if (flag & CL_SLAVE) {
-                        list_add(&mnt->mnt_slave, &old->mnt_slave_list);
-                        mnt->mnt_master = old;
-                        CLEAR_MNT_SHARED(mnt);
-                } else if (!(flag & CL_PRIVATE)) {
-                        if ((flag & CL_MAKE_SHARED) || IS_MNT_SHARED(old))
-                                list_add(&mnt->mnt_share, &old->mnt_share);
-                        if (IS_MNT_SLAVE(old))
-                                list_add(&mnt->mnt_slave, &old->mnt_slave);
-                        mnt->mnt_master = old->mnt_master;
-                }
-                if (flag & CL_MAKE_SHARED)
-                        set_mnt_shared(mnt);
-
-                /* stick the duplicate mount on the same expiry list
-                 * as the original if that was on one */
-                if (flag & CL_EXPIRE) {
-                        if (!list_empty(&old->mnt_expire))
-                                list_add(&mnt->mnt_expire, &old->mnt_expire);
-                }
+        if ((flag & CL_MAKE_SHARED) && !mnt->mnt_group_id) {
+                err = mnt_alloc_group_id(mnt);
+                if (err)
+                        goto out_free;
         }
+
+        mnt->mnt.mnt_flags = old->mnt.mnt_flags & ~MNT_WRITE_HOLD;
+        atomic_inc(&sb->s_active);
+        mnt->mnt.mnt_sb = sb;
+        mnt->mnt.mnt_root = dget(root);
+        mnt->mnt_mountpoint = mnt->mnt.mnt_root;
+        mnt->mnt_parent = mnt;
+        br_write_lock(&vfsmount_lock);
+        list_add_tail(&mnt->mnt_instance, &sb->s_mounts);
+        br_write_unlock(&vfsmount_lock);
+
+        if (flag & CL_SLAVE) {
+                list_add(&mnt->mnt_slave, &old->mnt_slave_list);
+                mnt->mnt_master = old;
+                CLEAR_MNT_SHARED(mnt);
+        } else if (!(flag & CL_PRIVATE)) {
+                if ((flag & CL_MAKE_SHARED) || IS_MNT_SHARED(old))
+                        list_add(&mnt->mnt_share, &old->mnt_share);
+                if (IS_MNT_SLAVE(old))
+                        list_add(&mnt->mnt_slave, &old->mnt_slave);
+                mnt->mnt_master = old->mnt_master;
+        }
+        if (flag & CL_MAKE_SHARED)
+                set_mnt_shared(mnt);
+
+        /* stick the duplicate mount on the same expiry list
+         * as the original if that was on one */
+        if (flag & CL_EXPIRE) {
+                if (!list_empty(&old->mnt_expire))
+                        list_add(&mnt->mnt_expire, &old->mnt_expire);
+        }
+
         return mnt;
 
  out_free:
         free_vfsmnt(mnt);
-        return NULL;
+        return ERR_PTR(err);
 }
 
 static inline void mntfree(struct mount *mnt)
@@ -804,7 +803,8 @@ static void mntput_no_expire(struct mount *mnt)
 put_again:
 #ifdef CONFIG_SMP
         br_read_lock(&vfsmount_lock);
-        if (likely(atomic_read(&mnt->mnt_longterm))) {
+        if (likely(mnt->mnt_ns)) {
+                /* shouldn't be the last one */
                 mnt_add_count(mnt, -1);
                 br_read_unlock(&vfsmount_lock);
                 return;
@@ -939,7 +939,7 @@ EXPORT_SYMBOL(replace_mount_options);
 /* iterator; we want it to have access to namespace_sem, thus here... */
 static void *m_start(struct seq_file *m, loff_t *pos)
 {
-        struct proc_mounts *p = container_of(m, struct proc_mounts, m);
+        struct proc_mounts *p = proc_mounts(m);
 
         down_read(&namespace_sem);
         return seq_list_start(&p->ns->list, *pos);
@@ -947,7 +947,7 @@ static void *m_start(struct seq_file *m, loff_t *pos)
 
 static void *m_next(struct seq_file *m, void *v, loff_t *pos)
 {
-        struct proc_mounts *p = container_of(m, struct proc_mounts, m);
+        struct proc_mounts *p = proc_mounts(m);
 
         return seq_list_next(v, &p->ns->list, pos);
 }
@@ -959,7 +959,7 @@ static void m_stop(struct seq_file *m, void *v)
 
 static int m_show(struct seq_file *m, void *v)
 {
-        struct proc_mounts *p = container_of(m, struct proc_mounts, m);
+        struct proc_mounts *p = proc_mounts(m);
         struct mount *r = list_entry(v, struct mount, mnt_list);
         return p->show(m, &r->mnt);
 }
@@ -1074,8 +1074,6 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill)
                 list_del_init(&p->mnt_expire);
                 list_del_init(&p->mnt_list);
                 __touch_mnt_namespace(p->mnt_ns);
-                if (p->mnt_ns)
-                        __mnt_make_shortterm(p);
                 p->mnt_ns = NULL;
                 list_del_init(&p->mnt_child);
                 if (mnt_has_parent(p)) {
@@ -1260,11 +1258,12 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
         struct path path;
 
         if (!(flag & CL_COPY_ALL) && IS_MNT_UNBINDABLE(mnt))
-                return NULL;
+                return ERR_PTR(-EINVAL);
 
         res = q = clone_mnt(mnt, dentry, flag);
-        if (!q)
-                goto Enomem;
+        if (IS_ERR(q))
+                return q;
+
         q->mnt_mountpoint = mnt->mnt_mountpoint;
 
         p = mnt;
@@ -1286,8 +1285,8 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
                         path.mnt = &q->mnt;
                         path.dentry = p->mnt_mountpoint;
                         q = clone_mnt(p, p->mnt.mnt_root, flag);
-                        if (!q)
-                                goto Enomem;
+                        if (IS_ERR(q))
+                                goto out;
                         br_write_lock(&vfsmount_lock);
                         list_add_tail(&q->mnt_list, &res->mnt_list);
                         attach_mnt(q, &path);
@@ -1295,7 +1294,7 @@ struct mount *copy_tree(struct mount *mnt, struct dentry *dentry,
                 }
         }
         return res;
-Enomem:
+out:
         if (res) {
                 LIST_HEAD(umount_list);
                 br_write_lock(&vfsmount_lock);
@@ -1303,9 +1302,11 @@ Enomem:
                 br_write_unlock(&vfsmount_lock);
                 release_mounts(&umount_list);
         }
-        return NULL;
+        return q;
 }
 
+/* Caller should check returned pointer for errors */
+
 struct vfsmount *collect_mounts(struct path *path)
 {
         struct mount *tree;
@@ -1313,7 +1314,9 @@ struct vfsmount *collect_mounts(struct path *path)
         tree = copy_tree(real_mount(path->mnt), path->dentry,
                          CL_COPY_ALL | CL_PRIVATE);
         up_write(&namespace_sem);
-        return tree ? &tree->mnt : NULL;
+        if (IS_ERR(tree))
+                return NULL;
+        return &tree->mnt;
 }
 
 void drop_collected_mounts(struct vfsmount *mnt)
@@ -1608,14 +1611,15 @@ static int do_loopback(struct path *path, char *old_name,
         if (!check_mnt(real_mount(path->mnt)) || !check_mnt(old))
                 goto out2;
 
-        err = -ENOMEM;
         if (recurse)
                 mnt = copy_tree(old, old_path.dentry, 0);
         else
                 mnt = clone_mnt(old, old_path.dentry, 0);
 
-        if (!mnt)
-                goto out2;
+        if (IS_ERR(mnt)) {
+                err = PTR_ERR(mnt);
+                goto out;
+        }
 
         err = graft_tree(mnt, path);
         if (err) {
@@ -2209,23 +2213,6 @@ static struct mnt_namespace *alloc_mnt_ns(void)
         return new_ns;
 }
 
-void mnt_make_longterm(struct vfsmount *mnt)
-{
-        __mnt_make_longterm(real_mount(mnt));
-}
-
-void mnt_make_shortterm(struct vfsmount *m)
-{
-#ifdef CONFIG_SMP
-        struct mount *mnt = real_mount(m);
-        if (atomic_add_unless(&mnt->mnt_longterm, -1, 1))
-                return;
-        br_write_lock(&vfsmount_lock);
-        atomic_dec(&mnt->mnt_longterm);
-        br_write_unlock(&vfsmount_lock);
-#endif
-}
-
 /*
  * Allocate a new namespace structure and populate it with contents
  * copied from the namespace of the passed in task structure.
@@ -2246,10 +2233,10 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
         down_write(&namespace_sem);
         /* First pass: copy the tree topology */
         new = copy_tree(old, old->mnt.mnt_root, CL_COPY_ALL | CL_EXPIRE);
-        if (!new) {
+        if (IS_ERR(new)) {
                 up_write(&namespace_sem);
                 kfree(new_ns);
-                return ERR_PTR(-ENOMEM);
+                return ERR_CAST(new);
         }
         new_ns->root = new;
         br_write_lock(&vfsmount_lock);
@@ -2265,18 +2252,13 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
         q = new;
         while (p) {
                 q->mnt_ns = new_ns;
-                __mnt_make_longterm(q);
                 if (fs) {
                         if (&p->mnt == fs->root.mnt) {
                                 fs->root.mnt = mntget(&q->mnt);
-                                __mnt_make_longterm(q);
-                                mnt_make_shortterm(&p->mnt);
                                 rootmnt = &p->mnt;
                         }
                         if (&p->mnt == fs->pwd.mnt) {
                                 fs->pwd.mnt = mntget(&q->mnt);
-                                __mnt_make_longterm(q);
-                                mnt_make_shortterm(&p->mnt);
                                 pwdmnt = &p->mnt;
                         }
                 }
@@ -2320,7 +2302,6 @@ static struct mnt_namespace *create_mnt_ns(struct vfsmount *m)
         if (!IS_ERR(new_ns)) {
                 struct mount *mnt = real_mount(m);
                 mnt->mnt_ns = new_ns;
-                __mnt_make_longterm(mnt);
                 new_ns->root = mnt;
                 list_add(&new_ns->list, &mnt->mnt_list);
         } else {
@@ -2615,7 +2596,7 @@ struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
                  * it is a longterm mount, don't release mnt until
                  * we unmount before file sys is unregistered
                 */
-                mnt_make_longterm(mnt);
+                real_mount(mnt)->mnt_ns = MNT_NS_INTERNAL;
         }
         return mnt;
 }
@@ -2625,7 +2606,9 @@ void kern_unmount(struct vfsmount *mnt)
 {
         /* release long term mount so mount point can be released */
         if (!IS_ERR_OR_NULL(mnt)) {
-                mnt_make_shortterm(mnt);
+                br_write_lock(&vfsmount_lock);
+                real_mount(mnt)->mnt_ns = NULL;
+                br_write_unlock(&vfsmount_lock);
                 mntput(mnt);
         }
 }
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index aeed93a6bde0..4117e7b377bb 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -30,8 +30,8 @@ static void ncp_do_readdir(struct file *, void *, filldir_t,
 
 static int ncp_readdir(struct file *, void *, filldir_t);
 
-static int ncp_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
-static struct dentry *ncp_lookup(struct inode *, struct dentry *, struct nameidata *);
+static int ncp_create(struct inode *, struct dentry *, umode_t, bool);
+static struct dentry *ncp_lookup(struct inode *, struct dentry *, unsigned int);
 static int ncp_unlink(struct inode *, struct dentry *);
 static int ncp_mkdir(struct inode *, struct dentry *, umode_t);
 static int ncp_rmdir(struct inode *, struct dentry *);
@@ -72,7 +72,7 @@ const struct inode_operations ncp_dir_inode_operations =
 /*
  * Dentry operations routines
  */
-static int ncp_lookup_validate(struct dentry *, struct nameidata *);
+static int ncp_lookup_validate(struct dentry *, unsigned int);
 static int ncp_hash_dentry(const struct dentry *, const struct inode *,
                 struct qstr *);
 static int ncp_compare_dentry(const struct dentry *, const struct inode *,
@@ -290,7 +290,7 @@ leave_me:;
 
 
 static int
-ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd)
+ncp_lookup_validate(struct dentry *dentry, unsigned int flags)
 {
         struct ncp_server *server;
         struct dentry *parent;
@@ -302,7 +302,7 @@ ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd)
         if (dentry == dentry->d_sb->s_root)
                 return 1;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         parent = dget_parent(dentry);
@@ -836,7 +836,7 @@ out:
         return result;
 }
 
-static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         struct ncp_server *server = NCP_SERVER(dir);
         struct inode *inode = NULL;
@@ -980,7 +980,7 @@ out:
 }
 
 static int ncp_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
         return ncp_create_new(dir, dentry, mode, 0, 0);
 }
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index f430057ff3b3..a6b1c7fb8232 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -46,8 +46,8 @@
 static int nfs_opendir(struct inode *, struct file *);
 static int nfs_closedir(struct inode *, struct file *);
 static int nfs_readdir(struct file *, void *, filldir_t);
-static struct dentry *nfs_lookup(struct inode *, struct dentry *, struct nameidata *);
-static int nfs_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
+static struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
+static int nfs_create(struct inode *, struct dentry *, umode_t, bool);
 static int nfs_mkdir(struct inode *, struct dentry *, umode_t);
 static int nfs_rmdir(struct inode *, struct dentry *);
 static int nfs_unlink(struct inode *, struct dentry *);
@@ -111,11 +111,13 @@ const struct inode_operations nfs3_dir_inode_operations = {
 
 #ifdef CONFIG_NFS_V4
 
-static struct dentry *nfs_atomic_lookup(struct inode *, struct dentry *, struct nameidata *);
-static int nfs_open_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd);
+static int nfs_atomic_open(struct inode *, struct dentry *,
+                           struct file *, unsigned, umode_t,
+                           int *);
 const struct inode_operations nfs4_dir_inode_operations = {
-        .create         = nfs_open_create,
-        .lookup         = nfs_atomic_lookup,
+        .create         = nfs_create,
+        .lookup         = nfs_lookup,
+        .atomic_open    = nfs_atomic_open,
         .link           = nfs_link,
         .unlink         = nfs_unlink,
         .symlink        = nfs_symlink,
@@ -1029,27 +1031,14 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
 }
 
 /*
- * Return the intent data that applies to this particular path component
- *
- * Note that the current set of intents only apply to the very last
- * component of the path and none of them is set before that last
- * component.
- */
-static inline unsigned int nfs_lookup_check_intent(struct nameidata *nd,
-                                                unsigned int mask)
-{
-        return nd->flags & mask;
-}
-
-/*
  * Use intent information to check whether or not we're going to do
  * an O_EXCL create using this path component.
  */
-static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
+static int nfs_is_exclusive_create(struct inode *dir, unsigned int flags)
 {
         if (NFS_PROTO(dir)->version == 2)
                 return 0;
-        return nd && nfs_lookup_check_intent(nd, LOOKUP_EXCL);
+        return flags & LOOKUP_EXCL;
 }
 
 /*
@@ -1061,25 +1050,20 @@ static int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
  *
  */
 static inline
-int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd)
+int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
 {
         struct nfs_server *server = NFS_SERVER(inode);
 
         if (IS_AUTOMOUNT(inode))
                 return 0;
-        if (nd != NULL) {
-                /* VFS wants an on-the-wire revalidation */
-                if (nd->flags & LOOKUP_REVAL)
-                        goto out_force;
-                /* This is an open(2) */
-                if (nfs_lookup_check_intent(nd, LOOKUP_OPEN) != 0 &&
-                                !(server->flags & NFS_MOUNT_NOCTO) &&
-                                (S_ISREG(inode->i_mode) ||
-                                 S_ISDIR(inode->i_mode)))
-                        goto out_force;
-                return 0;
-        }
-        return nfs_revalidate_inode(server, inode);
+        /* VFS wants an on-the-wire revalidation */
+        if (flags & LOOKUP_REVAL)
+                goto out_force;
+        /* This is an open(2) */
+        if ((flags & LOOKUP_OPEN) && !(server->flags & NFS_MOUNT_NOCTO) &&
+            (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
+                goto out_force;
+        return 0;
 out_force:
         return __nfs_revalidate_inode(server, inode);
 }
@@ -1093,10 +1077,10 @@ out_force:
  */
 static inline
 int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
-                       struct nameidata *nd)
+                       unsigned int flags)
 {
         /* Don't revalidate a negative dentry if we're creating a new file */
-        if (nd != NULL && nfs_lookup_check_intent(nd, LOOKUP_CREATE) != 0)
+        if (flags & LOOKUP_CREATE)
                 return 0;
         if (NFS_SERVER(dir)->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG)
                 return 1;
@@ -1114,7 +1098,7 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry,
  * If the parent directory is seen to have changed, we throw out the
  * cached dentry and do a new lookup.
  */
-static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct inode *dir;
         struct inode *inode;
@@ -1123,7 +1107,7 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
         struct nfs_fattr *fattr = NULL;
         int error;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         parent = dget_parent(dentry);
@@ -1132,7 +1116,7 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
         inode = dentry->d_inode;
 
         if (!inode) {
-                if (nfs_neg_need_reval(dir, dentry, nd))
+                if (nfs_neg_need_reval(dir, dentry, flags))
                         goto out_bad;
                 goto out_valid_noent;
         }
@@ -1148,8 +1132,8 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
                 goto out_set_verifier;
 
         /* Force a full look up iff the parent directory has changed */
-        if (!nfs_is_exclusive_create(dir, nd) && nfs_check_verifier(dir, dentry)) {
-                if (nfs_lookup_verify_inode(inode, nd))
+        if (!nfs_is_exclusive_create(dir, flags) && nfs_check_verifier(dir, dentry)) {
+                if (nfs_lookup_verify_inode(inode, flags))
                         goto out_zap_parent;
                 goto out_valid;
         }
@@ -1286,7 +1270,7 @@ const struct dentry_operations nfs_dentry_operations = {
         .d_release      = nfs_d_release,
 };
 
-static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
 {
         struct dentry *res;
         struct dentry *parent;
@@ -1307,7 +1291,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
          * If we're doing an exclusive create, optimize away the lookup
          * but don't hash the dentry.
          */
-        if (nfs_is_exclusive_create(dir, nd)) {
+        if (nfs_is_exclusive_create(dir, flags)) {
                 d_instantiate(dentry, NULL);
                 res = NULL;
                 goto out;
@@ -1354,7 +1338,7 @@ out:
 }
 
 #ifdef CONFIG_NFS_V4
-static int nfs4_lookup_revalidate(struct dentry *, struct nameidata *);
+static int nfs4_lookup_revalidate(struct dentry *, unsigned int);
 
 const struct dentry_operations nfs4_dentry_operations = {
         .d_revalidate   = nfs4_lookup_revalidate,
@@ -1364,24 +1348,6 @@ const struct dentry_operations nfs4_dentry_operations = {
         .d_release      = nfs_d_release,
 };
 
-/*
- * Use intent information to determine whether we need to substitute
- * the NFSv4-style stateful OPEN for the LOOKUP call
- */
-static int is_atomic_open(struct nameidata *nd)
-{
-        if (nd == NULL || nfs_lookup_check_intent(nd, LOOKUP_OPEN) == 0)
-                return 0;
-        /* NFS does not (yet) have a stateful open for directories */
-        if (nd->flags & LOOKUP_DIRECTORY)
-                return 0;
-        /* Are we trying to write to a read only partition? */
-        if (__mnt_is_readonly(nd->path.mnt) &&
-            (nd->intent.open.flags & (O_CREAT|O_TRUNC|O_ACCMODE)))
-                return 0;
-        return 1;
-}
-
 static fmode_t flags_to_mode(int flags)
 {
         fmode_t res = (__force fmode_t)flags & FMODE_EXEC;
@@ -1403,136 +1369,143 @@ static int do_open(struct inode *inode, struct file *filp)
         return 0;
 }
 
-static int nfs_intent_set_file(struct nameidata *nd, struct nfs_open_context *ctx)
+static int nfs_finish_open(struct nfs_open_context *ctx,
+                           struct dentry *dentry,
+                           struct file *file, unsigned open_flags,
+                           int *opened)
 {
-        struct file *filp;
-        int ret = 0;
+        int err;
+
+        if (ctx->dentry != dentry) {
+                dput(ctx->dentry);
+                ctx->dentry = dget(dentry);
+        }
 
         /* If the open_intent is for execute, we have an extra check to make */
         if (ctx->mode & FMODE_EXEC) {
-                ret = nfs_may_open(ctx->dentry->d_inode,
-                                ctx->cred,
-                                nd->intent.open.flags);
-                if (ret < 0)
+                err = nfs_may_open(dentry->d_inode, ctx->cred, open_flags);
+                if (err < 0)
                         goto out;
         }
-        filp = lookup_instantiate_filp(nd, ctx->dentry, do_open);
-        if (IS_ERR(filp))
-                ret = PTR_ERR(filp);
-        else
-                nfs_file_set_open_context(filp, ctx);
+
+        err = finish_open(file, dentry, do_open, opened);
+        if (err)
+                goto out;
+        nfs_file_set_open_context(file, ctx);
+
 out:
         put_nfs_open_context(ctx);
-        return ret;
+        return err;
 }
 
-static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
+                            struct file *file, unsigned open_flags,
+                            umode_t mode, int *opened)
 {
         struct nfs_open_context *ctx;
-        struct iattr attr;
-        struct dentry *res = NULL;
+        struct dentry *res;
+        struct iattr attr = { .ia_valid = ATTR_OPEN };
         struct inode *inode;
-        int open_flags;
         int err;
 
-        dfprintk(VFS, "NFS: atomic_lookup(%s/%ld), %s\n",
+        /* Expect a negative dentry */
+        BUG_ON(dentry->d_inode);
+
+        dfprintk(VFS, "NFS: atomic_open(%s/%ld), %s\n",
                         dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
 
-        /* Check that we are indeed trying to open this file */
-        if (!is_atomic_open(nd))
+        /* NFS only supports OPEN on regular files */
+        if ((open_flags & O_DIRECTORY)) {
+                if (!d_unhashed(dentry)) {
+                        /*
+                         * Hashed negative dentry with O_DIRECTORY: dentry was
+                         * revalidated and is fine, no need to perform lookup
+                         * again
+                         */
+                        return -ENOENT;
+                }
                 goto no_open;
-
-        if (dentry->d_name.len > NFS_SERVER(dir)->namelen) {
-                res = ERR_PTR(-ENAMETOOLONG);
-                goto out;
-        }
-
-        /* Let vfs_create() deal with O_EXCL. Instantiate, but don't hash
-         * the dentry. */
-        if (nd->flags & LOOKUP_EXCL) {
-                d_instantiate(dentry, NULL);
-                goto out;
         }
 
-        open_flags = nd->intent.open.flags;
-        attr.ia_valid = ATTR_OPEN;
-
-        ctx = create_nfs_open_context(dentry, open_flags);
-        res = ERR_CAST(ctx);
-        if (IS_ERR(ctx))
-                goto out;
+        if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
+                return -ENAMETOOLONG;
 
-        if (nd->flags & LOOKUP_CREATE) {
-                attr.ia_mode = nd->intent.open.create_mode;
+        if (open_flags & O_CREAT) {
                 attr.ia_valid |= ATTR_MODE;
-                attr.ia_mode &= ~current_umask();
-        } else
-                open_flags &= ~(O_EXCL | O_CREAT);
-
+                attr.ia_mode = mode & ~current_umask();
+        }
         if (open_flags & O_TRUNC) {
                 attr.ia_valid |= ATTR_SIZE;
                 attr.ia_size = 0;
         }
 
-        /* Open the file on the server */
+        ctx = create_nfs_open_context(dentry, open_flags);
+        err = PTR_ERR(ctx);
+        if (IS_ERR(ctx))
+                goto out;
+
         nfs_block_sillyrename(dentry->d_parent);
         inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr);
+        d_drop(dentry);
         if (IS_ERR(inode)) {
                 nfs_unblock_sillyrename(dentry->d_parent);
                 put_nfs_open_context(ctx);
-                switch (PTR_ERR(inode)) {
-                        /* Make a negative dentry */
-                        case -ENOENT:
-                                d_add(dentry, NULL);
-                                res = NULL;
-                                goto out;
-                        /* This turned out not to be a regular file */
-                        case -EISDIR:
-                        case -ENOTDIR:
+                err = PTR_ERR(inode);
+                switch (err) {
+                case -ENOENT:
+                        d_add(dentry, NULL);
+                        break;
+                case -EISDIR:
+                case -ENOTDIR:
+                        goto no_open;
+                case -ELOOP:
+                        if (!(open_flags & O_NOFOLLOW))
                                 goto no_open;
-                        case -ELOOP:
-                                if (!(nd->intent.open.flags & O_NOFOLLOW))
-                                        goto no_open;
+                        break;
                         /* case -EINVAL: */
-                        default:
-                                res = ERR_CAST(inode);
-                                goto out;
+                default:
+                        break;
                 }
+                goto out;
         }
         res = d_add_unique(dentry, inode);
-        nfs_unblock_sillyrename(dentry->d_parent);
-        if (res != NULL) {
-                dput(ctx->dentry);
-                ctx->dentry = dget(res);
+        if (res != NULL)
                 dentry = res;
-        }
-        err = nfs_intent_set_file(nd, ctx);
-        if (err < 0) {
-                if (res != NULL)
-                        dput(res);
-                return ERR_PTR(err);
-        }
-out:
+
+        nfs_unblock_sillyrename(dentry->d_parent);
         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
-        return res;
+
+        err = nfs_finish_open(ctx, dentry, file, open_flags, opened);
+
+        dput(res);
+out:
+        return err;
+
 no_open:
-        return nfs_lookup(dir, dentry, nd);
+        res = nfs_lookup(dir, dentry, 0);
+        err = PTR_ERR(res);
+        if (IS_ERR(res))
+                goto out;
+
+        return finish_no_open(file, res);
 }
 
-static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int nfs4_lookup_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct dentry *parent = NULL;
         struct inode *inode;
         struct inode *dir;
-        int openflags, ret = 0;
+        int ret = 0;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
-        inode = dentry->d_inode;
-        if (!is_atomic_open(nd) || d_mountpoint(dentry))
+        if (!(flags & LOOKUP_OPEN) || (flags & LOOKUP_DIRECTORY))
+                goto no_open;
+        if (d_mountpoint(dentry))
                 goto no_open;
 
+        inode = dentry->d_inode;
         parent = dget_parent(dentry);
         dir = parent->d_inode;
 
@@ -1540,7 +1513,7 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
          * optimize away revalidation of negative dentries.
          */
         if (inode == NULL) {
-                if (!nfs_neg_need_reval(dir, dentry, nd))
+                if (!nfs_neg_need_reval(dir, dentry, flags))
                         ret = 1;
                 goto out;
         }
@@ -1548,9 +1521,8 @@ static int nfs4_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
         /* NFS only supports OPEN on regular files */
         if (!S_ISREG(inode->i_mode))
                 goto no_open_dput;
-        openflags = nd->intent.open.flags;
         /* We cannot do exclusive creation on a positive dentry */
-        if ((openflags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL))
+        if (flags & LOOKUP_EXCL)
                 goto no_open_dput;
 
         /* Let f_op->open() actually open (and revalidate) the file */
@@ -1563,48 +1535,7 @@ out:
 no_open_dput:
         dput(parent);
 no_open:
-        return nfs_lookup_revalidate(dentry, nd);
-}
-
-static int nfs_open_create(struct inode *dir, struct dentry *dentry,
-                umode_t mode, struct nameidata *nd)
-{
-        struct nfs_open_context *ctx = NULL;
-        struct iattr attr;
-        int error;
-        int open_flags = O_CREAT|O_EXCL;
-
-        dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
-                        dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
-
-        attr.ia_mode = mode;
-        attr.ia_valid = ATTR_MODE;
-
-        if (nd)
-                open_flags = nd->intent.open.flags;
-
-        ctx = create_nfs_open_context(dentry, open_flags);
-        error = PTR_ERR(ctx);
-        if (IS_ERR(ctx))
-                goto out_err_drop;
-
-        error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, ctx);
-        if (error != 0)
-                goto out_put_ctx;
-        if (nd) {
-                error = nfs_intent_set_file(nd, ctx);
-                if (error < 0)
-                        goto out_err;
-        } else {
-                put_nfs_open_context(ctx);
-        }
-        return 0;
-out_put_ctx:
-        put_nfs_open_context(ctx);
-out_err_drop:
-        d_drop(dentry);
-out_err:
-        return error;
+        return nfs_lookup_revalidate(dentry, flags);
 }
 
 #endif /* CONFIG_NFSV4 */
@@ -1658,11 +1589,11 @@ out_error:
  * reply path made it appear to have failed.
  */
 static int nfs_create(struct inode *dir, struct dentry *dentry,
-                umode_t mode, struct nameidata *nd)
+                umode_t mode, bool excl)
 {
         struct iattr attr;
+        int open_flags = excl ? O_CREAT | O_EXCL : O_CREAT;
         int error;
-        int open_flags = O_CREAT|O_EXCL;
 
         dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
                         dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
@@ -1670,10 +1601,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry,
         attr.ia_mode = mode;
         attr.ia_valid = ATTR_MODE;
 
-        if (nd)
-                open_flags = nd->intent.open.flags;
-
-        error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, NULL);
+        error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);
         if (error != 0)
                 goto out_err;
         return 0;
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 8abfb19bd3aa..a67990f90bd7 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -62,7 +62,7 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
                  */
                 spin_lock(&sb->s_root->d_inode->i_lock);
                 spin_lock(&sb->s_root->d_lock);
-                list_del_init(&sb->s_root->d_alias);
+                hlist_del_init(&sb->s_root->d_alias);
                 spin_unlock(&sb->s_root->d_lock);
                 spin_unlock(&sb->s_root->d_inode->i_lock);
         }
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 2292a0fd2bff..3187e24e8f78 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -314,7 +314,7 @@ static void nfs3_free_createdata(struct nfs3_createdata *data)
  */
 static int
 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
-                 int flags, struct nfs_open_context *ctx)
+                 int flags)
 {
         struct nfs3_createdata *data;
         umode_t mode = sattr->ia_mode;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 15fc7e4664ed..c157b2089b47 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2806,37 +2806,22 @@ static int nfs4_proc_readlink(struct inode *inode, struct page *page,
 }
 
 /*
- * Got race?
- * We will need to arrange for the VFS layer to provide an atomic open.
- * Until then, this create/open method is prone to inefficiency and race
- * conditions due to the lookup, create, and open VFS calls from sys_open()
- * placed on the wire.
- *
- * Given the above sorry state of affairs, I'm simply sending an OPEN.
- * The file will be opened again in the subsequent VFS open call
- * (nfs4_proc_file_open).
- *
- * The open for read will just hang around to be used by any process that
- * opens the file O_RDONLY. This will all be resolved with the VFS changes.
+ * This is just for mknod.  open(O_CREAT) will always do ->open_context().
  */
-
 static int
 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
-                 int flags, struct nfs_open_context *ctx)
+                 int flags)
 {
-        struct dentry *de = dentry;
+        struct nfs_open_context *ctx;
         struct nfs4_state *state;
-        struct rpc_cred *cred = NULL;
-        fmode_t fmode = 0;
         int status = 0;
 
-        if (ctx != NULL) {
-                cred = ctx->cred;
-                de = ctx->dentry;
-                fmode = ctx->mode;
-        }
+        ctx = alloc_nfs_open_context(dentry, FMODE_READ);
+        if (IS_ERR(ctx))
+                return PTR_ERR(ctx);
+
         sattr->ia_mode &= ~current_umask();
-        state = nfs4_do_open(dir, de, fmode, flags, sattr, cred, NULL);
+        state = nfs4_do_open(dir, dentry, ctx->mode, flags, sattr, ctx->cred, NULL);
         d_drop(dentry);
         if (IS_ERR(state)) {
                 status = PTR_ERR(state);
@@ -2844,11 +2829,9 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
         }
         d_add(dentry, igrab(state->inode));
         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
-        if (ctx != NULL)
-                ctx->state = state;
-        else
-                nfs4_close_sync(state, fmode);
+        ctx->state = state;
 out:
+        put_nfs_open_context(ctx);
         return status;
 }
 
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 617c7419a08e..4433806e116f 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -259,7 +259,7 @@ static void nfs_free_createdata(const struct nfs_createdata *data)
 
 static int
 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
-                int flags, struct nfs_open_context *ctx)
+                int flags)
 {
         struct nfs_createdata *data;
         struct rpc_message msg = {
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 06228192f64e..8b2a2977b720 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2419,7 +2419,7 @@ static struct dentry *nfs_fs_mount_common(struct file_system_type *fs_type,
                 sb_mntdata.mntflags |= MS_SYNCHRONOUS;
 
         /* Get a superblock - note that we may end up sharing one that already exists */
-        s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
+        s = sget(fs_type, compare_super, nfs_set_super, flags, &sb_mntdata);
         if (IS_ERR(s)) {
                 mntroot = ERR_CAST(s);
                 goto out_err_nosb;
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index c8bd9c3be7f7..4700a0a929d7 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -745,7 +745,7 @@ __be32
 nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
                         int may_flags, struct file **filp)
 {
-        struct dentry   *dentry;
+        struct path     path;
         struct inode    *inode;
         int             flags = O_RDONLY|O_LARGEFILE;
         __be32          err;
@@ -762,8 +762,9 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
         if (err)
                 goto out;
 
-        dentry = fhp->fh_dentry;
-        inode = dentry->d_inode;
+        path.mnt = fhp->fh_export->ex_path.mnt;
+        path.dentry = fhp->fh_dentry;
+        inode = path.dentry->d_inode;
 
         /* Disallow write access to files with the append-only bit set
          * or any access when mandatory locking enabled
@@ -792,8 +793,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
                 else
                         flags = O_WRONLY|O_LARGEFILE;
         }
-        *filp = dentry_open(dget(dentry), mntget(fhp->fh_export->ex_path.mnt),
-                            flags, current_cred());
+        *filp = dentry_open(&path, flags, current_cred());
         if (IS_ERR(*filp))
                 host_err = PTR_ERR(*filp);
         else {
@@ -1329,7 +1329,7 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
         err = 0;
         switch (type) {
         case S_IFREG:
-                host_err = vfs_create(dirp, dchild, iap->ia_mode, NULL);
+                host_err = vfs_create(dirp, dchild, iap->ia_mode, true);
                 if (!host_err)
                         nfsd_check_ignore_resizing(iap);
                 break;
@@ -1492,7 +1492,7 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
                 goto out;
         }
 
-        host_err = vfs_create(dirp, dchild, iap->ia_mode, NULL);
+        host_err = vfs_create(dirp, dchild, iap->ia_mode, true);
         if (host_err < 0) {
                 fh_drop_write(fhp);
                 goto out_nfserr;
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index b72847988b78..1d0c0b84c5a3 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -63,7 +63,7 @@ static inline int nilfs_add_nondir(struct dentry *dentry, struct inode *inode)
  */
 
 static struct dentry *
-nilfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+nilfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         struct inode *inode;
         ino_t ino;
@@ -85,7 +85,7 @@ nilfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
  * with d_instantiate().
  */
 static int nilfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                        struct nameidata *nd)
+                        bool excl)
 {
         struct inode *inode;
         struct nilfs_transaction_info ti;
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 1099a76cee59..d57c42f974ea 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1288,7 +1288,8 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
                 err = -EBUSY;
                 goto failed;
         }
-        s = sget(fs_type, nilfs_test_bdev_super, nilfs_set_bdev_super, sd.bdev);
+        s = sget(fs_type, nilfs_test_bdev_super, nilfs_set_bdev_super, flags,
+                 sd.bdev);
         mutex_unlock(&sd.bdev->bd_fsfreeze_mutex);
         if (IS_ERR(s)) {
                 err = PTR_ERR(s);
@@ -1301,7 +1302,6 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
                 s_new = true;
 
                 /* New superblock instance created */
-                s->s_flags = flags;
                 s->s_mode = mode;
                 strlcpy(s->s_id, bdevname(sd.bdev, b), sizeof(s->s_id));
                 sb_set_blocksize(s, block_size(sd.bdev));
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 3568c8a8b138..d43803669739 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -61,8 +61,6 @@ static struct fsnotify_event *get_one_event(struct fsnotify_group *group,
 static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
 {
         int client_fd;
-        struct dentry *dentry;
-        struct vfsmount *mnt;
         struct file *new_file;
 
         pr_debug("%s: group=%p event=%p\n", __func__, group, event);
@@ -81,12 +79,10 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event)
          * we need a new file handle for the userspace program so it can read even if it was
          * originally opened O_WRONLY.
          */
-        dentry = dget(event->path.dentry);
-        mnt = mntget(event->path.mnt);
         /* it's possible this event was an overflow event.  in that case dentry and mnt
          * are NULL;  That's fine, just don't call dentry open */
-        if (dentry && mnt)
-                new_file = dentry_open(dentry, mnt,
+        if (event->path.dentry && event->path.mnt)
+                new_file = dentry_open(&event->path,
                                        group->fanotify_data.f_flags | FMODE_NONOTIFY,
                                        current_cred());
         else
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index b39c5c161adb..6baadb5a8430 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -52,6 +52,7 @@ void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
 void __fsnotify_update_child_dentry_flags(struct inode *inode)
 {
         struct dentry *alias;
+        struct hlist_node *p;
         int watched;
 
         if (!S_ISDIR(inode->i_mode))
@@ -63,7 +64,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
         spin_lock(&inode->i_lock);
         /* run all of the dentries associated with this inode.  Since this is a
          * directory, there damn well better only be one item on this list */
-        list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+        hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
                 struct dentry *child;
 
                 /* run all of the children of the original inode and fix their
diff --git a/fs/ntfs/namei.c b/fs/ntfs/namei.c
index 358273e59ade..436f36037e09 100644
--- a/fs/ntfs/namei.c
+++ b/fs/ntfs/namei.c
@@ -101,7 +101,7 @@
  * Locking: Caller must hold i_mutex on the directory.
  */
 static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent,
-                struct nameidata *nd)
+                unsigned int flags)
 {
         ntfs_volume *vol = NTFS_SB(dir_ino->i_sb);
         struct inode *dent_inode;
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index e5ba34818332..8db4b58b2e4b 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -49,14 +49,13 @@ void ocfs2_dentry_attach_gen(struct dentry *dentry)
 }
 
 
-static int ocfs2_dentry_revalidate(struct dentry *dentry,
-                                   struct nameidata *nd)
+static int ocfs2_dentry_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct inode *inode;
         int ret = 0;    /* if all else fails, just return false */
         struct ocfs2_super *osb;
 
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         inode = dentry->d_inode;
@@ -170,13 +169,11 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
                                       u64 parent_blkno,
                                       int skip_unhashed)
 {
-        struct list_head *p;
-        struct dentry *dentry = NULL;
+        struct hlist_node *p;
+        struct dentry *dentry;
 
         spin_lock(&inode->i_lock);
-        list_for_each(p, &inode->i_dentry) {
-                dentry = list_entry(p, struct dentry, d_alias);
-
+        hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
                 spin_lock(&dentry->d_lock);
                 if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
                         trace_ocfs2_find_local_alias(dentry->d_name.len,
@@ -184,16 +181,13 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
 
                         dget_dlock(dentry);
                         spin_unlock(&dentry->d_lock);
-                        break;
+                        spin_unlock(&inode->i_lock);
+                        return dentry;
                 }
                 spin_unlock(&dentry->d_lock);
-
-                dentry = NULL;
         }
-
         spin_unlock(&inode->i_lock);
-
-        return dentry;
+        return NULL;
 }
 
 DEFINE_SPINLOCK(dentry_attach_lock);
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index e31d6ae013ab..83b6f98e0665 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -526,7 +526,7 @@ bail:
 static int dlmfs_create(struct inode *dir,
                         struct dentry *dentry,
                         umode_t mode,
-                        struct nameidata *nd)
+                        bool excl)
 {
         int status = 0;
         struct inode *inode;
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 9f39c640cddf..f1fd0741162b 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -98,7 +98,7 @@ static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 
 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
-                                   struct nameidata *nd)
+                                   unsigned int flags)
 {
         int status;
         u64 blkno;
@@ -618,7 +618,7 @@ static int ocfs2_mkdir(struct inode *dir,
 static int ocfs2_create(struct inode *dir,
                         struct dentry *dentry,
                         umode_t mode,
-                        struct nameidata *nd)
+                        bool excl)
 {
         int ret;
 
diff --git a/fs/omfs/dir.c b/fs/omfs/dir.c
index f00576ec320f..fb5b3ff79dc6 100644
--- a/fs/omfs/dir.c
+++ b/fs/omfs/dir.c
@@ -285,13 +285,13 @@ static int omfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 }
 
 static int omfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
         return omfs_add_node(dir, dentry, mode | S_IFREG);
 }
 
 static struct dentry *omfs_lookup(struct inode *dir, struct dentry *dentry,
-                                  struct nameidata *nd)
+                                  unsigned int flags)
 {
         struct buffer_head *bh;
         struct inode *inode = NULL;
diff --git a/fs/open.c b/fs/open.c
index 1540632d8387..1e914b397e12 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -537,25 +537,6 @@ static int chown_common(struct path *path, uid_t user, gid_t group)
         return error;
 }
 
-SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)
-{
-        struct path path;
-        int error;
-
-        error = user_path(filename, &path);
-        if (error)
-                goto out;
-        error = mnt_want_write(path.mnt);
-        if (error)
-                goto out_release;
-        error = chown_common(&path, user, group);
-        mnt_drop_write(path.mnt);
-out_release:
-        path_put(&path);
-out:
-        return error;
-}
-
 SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
                 gid_t, group, int, flag)
 {
@@ -583,23 +564,15 @@ out:
         return error;
 }
 
-SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)
+SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)
 {
-        struct path path;
-        int error;
+        return sys_fchownat(AT_FDCWD, filename, user, group, 0);
+}
 
-        error = user_lpath(filename, &path);
-        if (error)
-                goto out;
-        error = mnt_want_write(path.mnt);
-        if (error)
-                goto out_release;
-        error = chown_common(&path, user, group);
-        mnt_drop_write(path.mnt);
-out_release:
-        path_put(&path);
-out:
-        return error;
+SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)
+{
+        return sys_fchownat(AT_FDCWD, filename, user, group,
+                            AT_SYMLINK_NOFOLLOW);
 }
 
 SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
@@ -667,10 +640,9 @@ int open_check_o_direct(struct file *f)
         return 0;
 }
 
-static struct file *do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
-                                   struct file *f,
-                                   int (*open)(struct inode *, struct file *),
-                                   const struct cred *cred)
+static int do_dentry_open(struct file *f,
+                          int (*open)(struct inode *, struct file *),
+                          const struct cred *cred)
 {
         static const struct file_operations empty_fops = {};
         struct inode *inode;
@@ -682,9 +654,9 @@ static struct file *do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
         if (unlikely(f->f_flags & O_PATH))
                 f->f_mode = FMODE_PATH;
 
-        inode = dentry->d_inode;
+        inode = f->f_path.dentry->d_inode;
         if (f->f_mode & FMODE_WRITE) {
-                error = __get_file_write_access(inode, mnt);
+                error = __get_file_write_access(inode, f->f_path.mnt);
                 if (error)
                         goto cleanup_file;
                 if (!special_file(inode->i_mode))
@@ -692,14 +664,12 @@ static struct file *do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
         }
 
         f->f_mapping = inode->i_mapping;
-        f->f_path.dentry = dentry;
-        f->f_path.mnt = mnt;
         f->f_pos = 0;
         file_sb_list_add(f, inode->i_sb);
 
         if (unlikely(f->f_mode & FMODE_PATH)) {
                 f->f_op = &empty_fops;
-                return f;
+                return 0;
         }
 
         f->f_op = fops_get(inode->i_fop);
@@ -726,10 +696,11 @@ static struct file *do_dentry_open(struct dentry *dentry, struct vfsmount *mnt,
 
         file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping);
 
-        return f;
+        return 0;
 
 cleanup_all:
         fops_put(f->f_op);
+        file_sb_list_del(f);
         if (f->f_mode & FMODE_WRITE) {
                 put_write_access(inode);
                 if (!special_file(inode->i_mode)) {
@@ -740,124 +711,62 @@ cleanup_all:
                          * here, so just reset the state.
                          */
                         file_reset_write(f);
-                        mnt_drop_write(mnt);
+                        mnt_drop_write(f->f_path.mnt);
                 }
         }
-        file_sb_list_del(f);
-        f->f_path.dentry = NULL;
-        f->f_path.mnt = NULL;
 cleanup_file:
-        dput(dentry);
-        mntput(mnt);
-        return ERR_PTR(error);
-}
-
-static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
-                                struct file *f,
-                                int (*open)(struct inode *, struct file *),
-                                const struct cred *cred)
-{
-        struct file *res = do_dentry_open(dentry, mnt, f, open, cred);
-        if (!IS_ERR(res)) {
-                int error = open_check_o_direct(f);
-                if (error) {
-                        fput(res);
-                        res = ERR_PTR(error);
-                }
-        } else {
-                put_filp(f);
-        }
-        return res;
+        path_put(&f->f_path);
+        f->f_path.mnt = NULL;
+        f->f_path.dentry = NULL;
+        return error;
 }
 
 /**
- * lookup_instantiate_filp - instantiates the open intent filp
- * @nd: pointer to nameidata
+ * finish_open - finish opening a file
+ * @od: opaque open data
  * @dentry: pointer to dentry
  * @open: open callback
  *
- * Helper for filesystems that want to use lookup open intents and pass back
- * a fully instantiated struct file to the caller.
- * This function is meant to be called from within a filesystem's
- * lookup method.
- * Beware of calling it for non-regular files! Those ->open methods might block
- * (e.g. in fifo_open), leaving you with parent locked (and in case of fifo,
- * leading to a deadlock, as nobody can open that fifo anymore, because
- * another process to open fifo will block on locked parent when doing lookup).
- * Note that in case of error, nd->intent.open.file is destroyed, but the
- * path information remains valid.
+ * This can be used to finish opening a file passed to i_op->atomic_open().
+ *
  * If the open callback is set to NULL, then the standard f_op->open()
  * filesystem callback is substituted.
  */
-struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
-                int (*open)(struct inode *, struct file *))
+int finish_open(struct file *file, struct dentry *dentry,
+                int (*open)(struct inode *, struct file *),
+                int *opened)
 {
-        const struct cred *cred = current_cred();
+        int error;
+        BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
 
-        if (IS_ERR(nd->intent.open.file))
-                goto out;
-        if (IS_ERR(dentry))
-                goto out_err;
-        nd->intent.open.file = __dentry_open(dget(dentry), mntget(nd->path.mnt),
-                                             nd->intent.open.file,
-                                             open, cred);
-out:
-        return nd->intent.open.file;
-out_err:
-        release_open_intent(nd);
-        nd->intent.open.file = ERR_CAST(dentry);
-        goto out;
+        mntget(file->f_path.mnt);
+        file->f_path.dentry = dget(dentry);
+
+        error = do_dentry_open(file, open, current_cred());
+        if (!error)
+                *opened |= FILE_OPENED;
+
+        return error;
 }
-EXPORT_SYMBOL_GPL(lookup_instantiate_filp);
+EXPORT_SYMBOL(finish_open);
 
 /**
- * nameidata_to_filp - convert a nameidata to an open filp.
- * @nd: pointer to nameidata
- * @flags: open flags
+ * finish_no_open - finish ->atomic_open() without opening the file
+ *
+ * @od: opaque open data
+ * @dentry: dentry or NULL (as returned from ->lookup())
  *
- * Note that this function destroys the original nameidata
+ * This can be used to set the result of a successful lookup in ->atomic_open().
+ * The filesystem's atomic_open() method shall return NULL after calling this.
  */
-struct file *nameidata_to_filp(struct nameidata *nd)
+int finish_no_open(struct file *file, struct dentry *dentry)
 {
-        const struct cred *cred = current_cred();
-        struct file *filp;
-
-        /* Pick up the filp from the open intent */
-        filp = nd->intent.open.file;
-
-        /* Has the filesystem initialised the file for us? */
-        if (filp->f_path.dentry != NULL) {
-                nd->intent.open.file = NULL;
-        } else {
-                struct file *res;
-
-                path_get(&nd->path);
-                res = do_dentry_open(nd->path.dentry, nd->path.mnt,
-                                     filp, NULL, cred);
-                if (!IS_ERR(res)) {
-                        int error;
-
-                        nd->intent.open.file = NULL;
-                        BUG_ON(res != filp);
-
-                        error = open_check_o_direct(filp);
-                        if (error) {
-                                fput(filp);
-                                filp = ERR_PTR(error);
-                        }
-                } else {
-                        /* Allow nd->intent.open.file to be recycled */
-                        filp = res;
-                }
-        }
-        return filp;
+        file->f_path.dentry = dentry;
+        return 1;
 }
+EXPORT_SYMBOL(finish_no_open);
 
-/*
- * dentry_open() will have done dput(dentry) and mntput(mnt) if it returns an
- * error.
- */
-struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags,
+struct file *dentry_open(const struct path *path, int flags,
                          const struct cred *cred)
 {
         int error;
@@ -866,18 +775,28 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags,
         validate_creds(cred);
 
         /* We must always pass in a valid mount pointer. */
-        BUG_ON(!mnt);
+        BUG_ON(!path->mnt);
 
         error = -ENFILE;
         f = get_empty_filp();
-        if (f == NULL) {
-                dput(dentry);
-                mntput(mnt);
+        if (f == NULL)
                 return ERR_PTR(error);
-        }
 
         f->f_flags = flags;
-        return __dentry_open(dentry, mnt, f, NULL, cred);
+        f->f_path = *path;
+        path_get(&f->f_path);
+        error = do_dentry_open(f, NULL, cred);
+        if (!error) {
+                error = open_check_o_direct(f);
+                if (error) {
+                        fput(f);
+                        f = ERR_PTR(error);
+                }
+        } else { 
+                put_filp(f);
+                f = ERR_PTR(error);
+        }
+        return f;
 }
 EXPORT_SYMBOL(dentry_open);
 
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index bc49c975d501..4a3477949bca 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -170,13 +170,13 @@ static const struct file_operations openprom_operations = {
         .llseek         = generic_file_llseek,
 };
 
-static struct dentry *openpromfs_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *openpromfs_lookup(struct inode *, struct dentry *, unsigned int);
 
 static const struct inode_operations openprom_inode_operations = {
         .lookup         = openpromfs_lookup,
 };
 
-static struct dentry *openpromfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *openpromfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         struct op_inode_info *ent_oi, *oi = OP_I(dir);
         struct device_node *dp, *child;
diff --git a/fs/pnode.c b/fs/pnode.c
index bed378db0758..3e000a51ac0d 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -237,8 +237,9 @@ int propagate_mnt(struct mount *dest_mnt, struct dentry *dest_dentry,
 
                 source =  get_source(m, prev_dest_mnt, prev_src_mnt, &type);
 
-                if (!(child = copy_tree(source, source->mnt.mnt_root, type))) {
-                        ret = -ENOMEM;
+                child = copy_tree(source, source->mnt.mnt_root, type);
+                if (IS_ERR(child)) {
+                        ret = PTR_ERR(child);
                         list_splice(tree_list, tmp_list.prev);
                         goto out;
                 }
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 437195f204e1..2772208338f8 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1427,16 +1427,19 @@ static int proc_exe_link(struct dentry *dentry, struct path *exe_path)
 static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
         struct inode *inode = dentry->d_inode;
+        struct path path;
         int error = -EACCES;
 
-        /* We don't need a base pointer in the /proc filesystem */
-        path_put(&nd->path);
-
         /* Are we allowed to snoop on the tasks file descriptors? */
         if (!proc_fd_access_allowed(inode))
                 goto out;
 
-        error = PROC_I(inode)->op.proc_get_link(dentry, &nd->path);
+        error = PROC_I(inode)->op.proc_get_link(dentry, &path);
+        if (error)
+                goto out;
+
+        nd_jump_link(nd, &path);
+        return NULL;
 out:
         return ERR_PTR(error);
 }
@@ -1601,13 +1604,13 @@ int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
  * made this apply to all per process world readable and executable
  * directories.
  */
-int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
+int pid_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct inode *inode;
         struct task_struct *task;
         const struct cred *cred;
 
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         inode = dentry->d_inode;
@@ -1781,7 +1784,7 @@ static int proc_fd_link(struct dentry *dentry, struct path *path)
         return proc_fd_info(dentry->d_inode, path, NULL);
 }
 
-static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int tid_fd_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct inode *inode;
         struct task_struct *task;
@@ -1789,7 +1792,7 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
         struct files_struct *files;
         const struct cred *cred;
 
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         inode = dentry->d_inode;
@@ -1868,7 +1871,7 @@ static struct dentry *proc_fd_instantiate(struct inode *dir,
         d_set_d_op(dentry, &tid_fd_dentry_operations);
         d_add(dentry, inode);
         /* Close the race of the process dying before we return the dentry */
-        if (tid_fd_revalidate(dentry, NULL))
+        if (tid_fd_revalidate(dentry, 0))
                 error = NULL;
 
  out:
@@ -1956,7 +1959,7 @@ out_no_task:
 }
 
 static struct dentry *proc_lookupfd(struct inode *dir, struct dentry *dentry,
-                                    struct nameidata *nd)
+                                    unsigned int flags)
 {
         return proc_lookupfd_common(dir, dentry, proc_fd_instantiate);
 }
@@ -2003,7 +2006,7 @@ static int dname_to_vma_addr(struct dentry *dentry,
         return 0;
 }
 
-static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
 {
         unsigned long vm_start, vm_end;
         bool exact_vma_exists = false;
@@ -2013,7 +2016,7 @@ static int map_files_d_revalidate(struct dentry *dentry, struct nameidata *nd)
         struct inode *inode;
         int status = 0;
 
-        if (nd && nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         if (!capable(CAP_SYS_ADMIN)) {
@@ -2145,7 +2148,7 @@ proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
 }
 
 static struct dentry *proc_map_files_lookup(struct inode *dir,
-                struct dentry *dentry, struct nameidata *nd)
+                struct dentry *dentry, unsigned int flags)
 {
         unsigned long vm_start, vm_end;
         struct vm_area_struct *vma;
@@ -2371,7 +2374,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir,
         d_set_d_op(dentry, &tid_fd_dentry_operations);
         d_add(dentry, inode);
         /* Close the race of the process dying before we return the dentry */
-        if (tid_fd_revalidate(dentry, NULL))
+        if (tid_fd_revalidate(dentry, 0))
                 error = NULL;
 
  out:
@@ -2380,7 +2383,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir,
 
 static struct dentry *proc_lookupfdinfo(struct inode *dir,
                                         struct dentry *dentry,
-                                        struct nameidata *nd)
+                                        unsigned int flags)
 {
         return proc_lookupfd_common(dir, dentry, proc_fdinfo_instantiate);
 }
@@ -2430,7 +2433,7 @@ static struct dentry *proc_pident_instantiate(struct inode *dir,
         d_set_d_op(dentry, &pid_dentry_operations);
         d_add(dentry, inode);
         /* Close the race of the process dying before we return the dentry */
-        if (pid_revalidate(dentry, NULL))
+        if (pid_revalidate(dentry, 0))
                 error = NULL;
 out:
         return error;
@@ -2630,7 +2633,7 @@ static const struct file_operations proc_attr_dir_operations = {
 };
 
 static struct dentry *proc_attr_dir_lookup(struct inode *dir,
-                                struct dentry *dentry, struct nameidata *nd)
+                                struct dentry *dentry, unsigned int flags)
 {
         return proc_pident_lookup(dir, dentry,
                                   attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
@@ -3114,7 +3117,8 @@ static const struct file_operations proc_tgid_base_operations = {
         .llseek         = default_llseek,
 };
 
-static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
         return proc_pident_lookup(dir, dentry,
                                   tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
 }
@@ -3237,13 +3241,13 @@ static struct dentry *proc_pid_instantiate(struct inode *dir,
 
         d_add(dentry, inode);
         /* Close the race of the process dying before we return the dentry */
-        if (pid_revalidate(dentry, NULL))
+        if (pid_revalidate(dentry, 0))
                 error = NULL;
 out:
         return error;
 }
 
-struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
 {
         struct dentry *result;
         struct task_struct *task;
@@ -3470,7 +3474,8 @@ static int proc_tid_base_readdir(struct file * filp,
                                    tid_base_stuff,ARRAY_SIZE(tid_base_stuff));
 }
 
-static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
         return proc_pident_lookup(dir, dentry,
                                   tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
 }
@@ -3508,13 +3513,13 @@ static struct dentry *proc_task_instantiate(struct inode *dir,
 
         d_add(dentry, inode);
         /* Close the race of the process dying before we return the dentry */
-        if (pid_revalidate(dentry, NULL))
+        if (pid_revalidate(dentry, 0))
                 error = NULL;
 out:
         return error;
 }
 
-static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
 {
         struct dentry *result = ERR_PTR(-ENOENT);
         struct task_struct *task;
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 2edf34f2eb61..b3647fe6a608 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -446,7 +446,7 @@ out_unlock:
 }
 
 struct dentry *proc_lookup(struct inode *dir, struct dentry *dentry,
-                struct nameidata *nd)
+                unsigned int flags)
 {
         return proc_lookup_de(PDE(dir), dir, dentry);
 }
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index eca4aca5b6e2..e1167a1c9126 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -106,7 +106,7 @@ void pde_users_dec(struct proc_dir_entry *pde);
 
 extern spinlock_t proc_subdir_lock;
 
-struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
+struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int);
 int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
 unsigned long task_vsize(struct mm_struct *);
 unsigned long task_statm(struct mm_struct *,
@@ -132,7 +132,7 @@ int proc_remount(struct super_block *sb, int *flags, char *data);
  * of the /proc/<pid> subdirectories.
  */
 int proc_readdir(struct file *, void *, filldir_t);
-struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
+struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);
 
 
 
@@ -142,7 +142,7 @@ typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
 int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
         const char *name, int len,
         instantiate_t instantiate, struct task_struct *task, const void *ptr);
-int pid_revalidate(struct dentry *dentry, struct nameidata *nd);
+int pid_revalidate(struct dentry *dentry, unsigned int flags);
 struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
 extern const struct dentry_operations pid_dentry_operations;
 int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 0d9e23a39e49..b178ed733c36 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -56,7 +56,7 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
         d_set_d_op(dentry, &pid_dentry_operations);
         d_add(dentry, inode);
         /* Close the race of the process dying before we return the dentry */
-        if (pid_revalidate(dentry, NULL))
+        if (pid_revalidate(dentry, 0))
                 error = NULL;
 out:
         return error;
@@ -140,7 +140,7 @@ const struct file_operations proc_ns_dir_operations = {
 };
 
 static struct dentry *proc_ns_dir_lookup(struct inode *dir,
-                                struct dentry *dentry, struct nameidata *nd)
+                                struct dentry *dentry, unsigned int flags)
 {
         struct dentry *error;
         struct task_struct *task = get_proc_task(dir);
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 06e1cc17caf6..fe72cd073dea 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -119,7 +119,7 @@ static struct net *get_proc_task_net(struct inode *dir)
 }
 
 static struct dentry *proc_tgid_net_lookup(struct inode *dir,
-                struct dentry *dentry, struct nameidata *nd)
+                struct dentry *dentry, unsigned int flags)
 {
         struct dentry *de;
         struct net *net;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 3476bca8f7af..dfafeb2b05a0 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -433,7 +433,7 @@ static struct ctl_table_header *grab_header(struct inode *inode)
 }
 
 static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
-                                        struct nameidata *nd)
+                                        unsigned int flags)
 {
         struct ctl_table_header *head = grab_header(dir);
         struct ctl_table_header *h = NULL;
@@ -794,9 +794,9 @@ static const struct inode_operations proc_sys_dir_operations = {
         .getattr        = proc_sys_getattr,
 };
 
-static int proc_sys_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int proc_sys_revalidate(struct dentry *dentry, unsigned int flags)
 {
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
         return !PROC_I(dentry->d_inode)->sysctl->unregistering;
 }
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 7c30fce037c0..9a2d9fd7cadd 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -111,7 +111,7 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
                 options = data;
         }
 
-        sb = sget(fs_type, proc_test_super, proc_set_super, ns);
+        sb = sget(fs_type, proc_test_super, proc_set_super, flags, ns);
         if (IS_ERR(sb))
                 return ERR_CAST(sb);
 
@@ -121,7 +121,6 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
         }
 
         if (!sb->s_root) {
-                sb->s_flags = flags;
                 err = proc_fill_super(sb);
                 if (err) {
                         deactivate_locked_super(sb);
@@ -200,13 +199,12 @@ static int proc_root_getattr(struct vfsmount *mnt, struct dentry *dentry, struct
         return 0;
 }
 
-static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
 {
-        if (!proc_lookup(dir, dentry, nd)) {
+        if (!proc_lookup(dir, dentry, flags))
                 return NULL;
-        }
         
-        return proc_pid_lookup(dir, dentry, nd);
+        return proc_pid_lookup(dir, dentry, flags);
 }
 
 static int proc_root_readdir(struct file * filp,
diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index 5e289a7cbad1..5fe34c355e85 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -17,7 +17,7 @@
 
 static unsigned mounts_poll(struct file *file, poll_table *wait)
 {
-        struct proc_mounts *p = file->private_data;
+        struct proc_mounts *p = proc_mounts(file->private_data);
         struct mnt_namespace *ns = p->ns;
         unsigned res = POLLIN | POLLRDNORM;
 
@@ -121,7 +121,7 @@ out:
 
 static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt)
 {
-        struct proc_mounts *p = m->private;
+        struct proc_mounts *p = proc_mounts(m);
         struct mount *r = real_mount(mnt);
         struct super_block *sb = mnt->mnt_sb;
         struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
@@ -268,7 +268,6 @@ static int mounts_open_common(struct inode *inode, struct file *file,
         if (ret)
                 goto err_free;
 
-        p->m.private = p;
         p->ns = ns;
         p->root = root;
         p->m.poll_event = ns->event;
@@ -288,7 +287,7 @@ static int mounts_open_common(struct inode *inode, struct file *file,
 
 static int mounts_release(struct inode *inode, struct file *file)
 {
-        struct proc_mounts *p = file->private_data;
+        struct proc_mounts *p = proc_mounts(file->private_data);
         path_put(&p->root);
         put_mnt_ns(p->ns);
         return seq_release(inode, file);
diff --git a/fs/qnx4/namei.c b/fs/qnx4/namei.c
index a512c0b30e8e..d024505ba007 100644
--- a/fs/qnx4/namei.c
+++ b/fs/qnx4/namei.c
@@ -95,7 +95,7 @@ static struct buffer_head *qnx4_find_entry(int len, struct inode *dir,
         return NULL;
 }
 
-struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+struct dentry * qnx4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         int ino;
         struct qnx4_inode_entry *de;
diff --git a/fs/qnx4/qnx4.h b/fs/qnx4/qnx4.h
index 244d4620189b..34e2d329c97e 100644
--- a/fs/qnx4/qnx4.h
+++ b/fs/qnx4/qnx4.h
@@ -23,7 +23,7 @@ struct qnx4_inode_info {
 };
 
 extern struct inode *qnx4_iget(struct super_block *, unsigned long);
-extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd);
+extern struct dentry *qnx4_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags);
 extern unsigned long qnx4_count_free_blocks(struct super_block *sb);
 extern unsigned long qnx4_block_map(struct inode *inode, long iblock);
 
diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c
index e44012dc5645..2049c814bda4 100644
--- a/fs/qnx6/inode.c
+++ b/fs/qnx6/inode.c
@@ -622,7 +622,6 @@ static struct inode *qnx6_alloc_inode(struct super_block *sb)
 static void qnx6_i_callback(struct rcu_head *head)
 {
         struct inode *inode = container_of(head, struct inode, i_rcu);
-        INIT_LIST_HEAD(&inode->i_dentry);
         kmem_cache_free(qnx6_inode_cachep, QNX6_I(inode));
 }
 
diff --git a/fs/qnx6/namei.c b/fs/qnx6/namei.c
index 8a97289e04ad..0561326a94f5 100644
--- a/fs/qnx6/namei.c
+++ b/fs/qnx6/namei.c
@@ -13,7 +13,7 @@
 #include "qnx6.h"
 
 struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
-                                struct nameidata *nd)
+                                unsigned int flags)
 {
         unsigned ino;
         struct page *page;
diff --git a/fs/qnx6/qnx6.h b/fs/qnx6/qnx6.h
index 6c5e02a0b6a8..b00fcc960d37 100644
--- a/fs/qnx6/qnx6.h
+++ b/fs/qnx6/qnx6.h
@@ -45,7 +45,7 @@ struct qnx6_inode_info {
 
 extern struct inode *qnx6_iget(struct super_block *sb, unsigned ino);
 extern struct dentry *qnx6_lookup(struct inode *dir, struct dentry *dentry,
-                                        struct nameidata *nd);
+                                        unsigned int flags);
 
 #ifdef CONFIG_QNX6FS_DEBUG
 extern void qnx6_superblock_debug(struct qnx6_super_block *,
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 10cbe841cb7e..d679fc48ef27 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -595,12 +595,14 @@ out:
 }
 EXPORT_SYMBOL(dquot_scan_active);
 
-int dquot_quota_sync(struct super_block *sb, int type, int wait)
+/* Write all dquot structures to quota files */
+int dquot_writeback_dquots(struct super_block *sb, int type)
 {
         struct list_head *dirty;
         struct dquot *dquot;
         struct quota_info *dqopt = sb_dqopt(sb);
         int cnt;
+        int err, ret = 0;
 
         mutex_lock(&dqopt->dqonoff_mutex);
         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
@@ -624,7 +626,9 @@ int dquot_quota_sync(struct super_block *sb, int type, int wait)
                         atomic_inc(&dquot->dq_count);
                         spin_unlock(&dq_list_lock);
                         dqstats_inc(DQST_LOOKUPS);
-                        sb->dq_op->write_dquot(dquot);
+                        err = sb->dq_op->write_dquot(dquot);
+                        if (!ret && err)
+                                err = ret;
                         dqput(dquot);
                         spin_lock(&dq_list_lock);
                 }
@@ -638,7 +642,21 @@ int dquot_quota_sync(struct super_block *sb, int type, int wait)
         dqstats_inc(DQST_SYNCS);
         mutex_unlock(&dqopt->dqonoff_mutex);
 
-        if (!wait || (dqopt->flags & DQUOT_QUOTA_SYS_FILE))
+        return ret;
+}
+EXPORT_SYMBOL(dquot_writeback_dquots);
+
+/* Write all dquot structures to disk and make them visible from userspace */
+int dquot_quota_sync(struct super_block *sb, int type)
+{
+        struct quota_info *dqopt = sb_dqopt(sb);
+        int cnt;
+        int ret;
+
+        ret = dquot_writeback_dquots(sb, type);
+        if (ret)
+                return ret;
+        if (dqopt->flags & DQUOT_QUOTA_SYS_FILE)
                 return 0;
 
         /* This is not very clever (and fast) but currently I don't know about
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index 9a391204ca27..c659f92298d3 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -47,7 +47,7 @@ static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
 static void quota_sync_one(struct super_block *sb, void *arg)
 {
         if (sb->s_qcop && sb->s_qcop->quota_sync)
-                sb->s_qcop->quota_sync(sb, *(int *)arg, 1);
+                sb->s_qcop->quota_sync(sb, *(int *)arg);
 }
 
 static int quota_sync_all(int type)
@@ -270,7 +270,7 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
         case Q_SYNC:
                 if (!sb->s_qcop->quota_sync)
                         return -ENOSYS;
-                return sb->s_qcop->quota_sync(sb, type, 1);
+                return sb->s_qcop->quota_sync(sb, type);
         case Q_XQUOTAON:
         case Q_XQUOTAOFF:
         case Q_XQUOTARM:
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a1fdabe21dec..eab8c09d3801 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -114,7 +114,7 @@ static int ramfs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
         return retval;
 }
 
-static int ramfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
+static int ramfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
 {
         return ramfs_mknod(dir, dentry, mode | S_IFREG, 0);
 }
diff --git a/fs/read_write.c b/fs/read_write.c
index c20614f86c01..1adfb691e4f1 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -55,10 +55,11 @@ static loff_t lseek_execute(struct file *file, struct inode *inode,
  * @file:       file structure to seek on
  * @offset:     file offset to seek to
  * @origin:     type of seek
- * @size:       max size of file system
+ * @size:       max size of this file in file system
+ * @eof:        offset used for SEEK_END position
  *
  * This is a variant of generic_file_llseek that allows passing in a custom
- * file size.
+ * maximum file size and a custom EOF position, for e.g. hashed directories
  *
  * Synchronization:
  * SEEK_SET and SEEK_END are unsynchronized (but atomic on 64bit platforms)
@@ -67,13 +68,13 @@ static loff_t lseek_execute(struct file *file, struct inode *inode,
  */
 loff_t
 generic_file_llseek_size(struct file *file, loff_t offset, int origin,
-                loff_t maxsize)
+                loff_t maxsize, loff_t eof)
 {
         struct inode *inode = file->f_mapping->host;
 
         switch (origin) {
         case SEEK_END:
-                offset += i_size_read(inode);
+                offset += eof;
                 break;
         case SEEK_CUR:
                 /*
@@ -99,7 +100,7 @@ generic_file_llseek_size(struct file *file, loff_t offset, int origin,
                  * In the generic case the entire file is data, so as long as
                  * offset isn't at the end of the file then the offset is data.
                  */
-                if (offset >= i_size_read(inode))
+                if (offset >= eof)
                         return -ENXIO;
                 break;
         case SEEK_HOLE:
@@ -107,9 +108,9 @@ generic_file_llseek_size(struct file *file, loff_t offset, int origin,
                  * There is a virtual hole at the end of the file, so as long as
                  * offset isn't i_size or larger, return i_size.
                  */
-                if (offset >= i_size_read(inode))
+                if (offset >= eof)
                         return -ENXIO;
-                offset = i_size_read(inode);
+                offset = eof;
                 break;
         }
 
@@ -132,7 +133,8 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
         struct inode *inode = file->f_mapping->host;
 
         return generic_file_llseek_size(file, offset, origin,
-                                        inode->i_sb->s_maxbytes);
+                                        inode->i_sb->s_maxbytes,
+                                        i_size_read(inode));
 }
 EXPORT_SYMBOL(generic_file_llseek);
 
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 84e8a69cee9d..8567fb847601 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -322,7 +322,7 @@ static int reiserfs_find_entry(struct inode *dir, const char *name, int namelen,
 }
 
 static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
-                                      struct nameidata *nd)
+                                      unsigned int flags)
 {
         int retval;
         int lock_depth;
@@ -573,7 +573,7 @@ static int new_inode_init(struct inode *inode, struct inode *dir, umode_t mode)
 }
 
 static int reiserfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                           struct nameidata *nd)
+                           bool excl)
 {
         int retval;
         struct inode *inode;
@@ -634,8 +634,8 @@ static int reiserfs_create(struct inode *dir, struct dentry *dentry, umode_t mod
         reiserfs_update_inode_transaction(inode);
         reiserfs_update_inode_transaction(dir);
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
         retval = journal_end(&th, dir->i_sb, jbegin_count);
 
       out_failed:
@@ -712,8 +712,8 @@ static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode
                 goto out_failed;
         }
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
         retval = journal_end(&th, dir->i_sb, jbegin_count);
 
       out_failed:
@@ -800,8 +800,8 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
         // the above add_entry did not update dir's stat data
         reiserfs_update_sd(&th, dir);
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
         retval = journal_end(&th, dir->i_sb, jbegin_count);
 out_failed:
         reiserfs_write_unlock_once(dir->i_sb, lock_depth);
@@ -1096,8 +1096,8 @@ static int reiserfs_symlink(struct inode *parent_dir,
                 goto out_failed;
         }
 
-        d_instantiate(dentry, inode);
         unlock_new_inode(inode);
+        d_instantiate(dentry, inode);
         retval = journal_end(&th, parent_dir->i_sb, jbegin_count);
       out_failed:
         reiserfs_write_unlock(parent_dir->i_sb);
diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c
index 2c1ade692cc8..e60e87035bb3 100644
--- a/fs/reiserfs/procfs.c
+++ b/fs/reiserfs/procfs.c
@@ -403,7 +403,7 @@ static void *r_start(struct seq_file *m, loff_t * pos)
         if (l)
                 return NULL;
 
-        if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, s)))
+        if (IS_ERR(sget(&reiserfs_fs_type, test_sb, set_sb, 0, s)))
                 return NULL;
 
         up_write(&s->s_umount);
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 651ce767b55d..7a37dabf5a96 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -68,6 +68,11 @@ static int reiserfs_sync_fs(struct super_block *s, int wait)
 {
         struct reiserfs_transaction_handle th;
 
+        /*
+         * Writeback quota in non-journalled quota case - journalled quota has
+         * no dirty dquots
+         */
+        dquot_writeback_dquots(s, -1);
         reiserfs_write_lock(s);
         if (!journal_begin(&th, s, 1))
                 if (!journal_end_sync(&th, s, 1))
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 46fc1c20a6b1..d319963aeb11 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -62,7 +62,7 @@
 static int xattr_create(struct inode *dir, struct dentry *dentry, int mode)
 {
         BUG_ON(!mutex_is_locked(&dir->i_mutex));
-        return dir->i_op->create(dir, dentry, mode, NULL);
+        return dir->i_op->create(dir, dentry, mode, true);
 }
 #endif
 
@@ -942,7 +942,7 @@ int reiserfs_permission(struct inode *inode, int mask)
         return generic_permission(inode, mask);
 }
 
-static int xattr_hide_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int xattr_hide_revalidate(struct dentry *dentry, unsigned int flags)
 {
         return -EPERM;
 }
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index e64f6b5f7ae5..77c5f2173983 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -210,7 +210,7 @@ out:
  * look up an entry in a directory
  */
 static struct dentry *romfs_lookup(struct inode *dir, struct dentry *dentry,
-                                   struct nameidata *nd)
+                                   unsigned int flags)
 {
         unsigned long offset, maxoff;
         struct inode *inode;
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c
index abcc58f3c152..7834a517f7f4 100644
--- a/fs/squashfs/namei.c
+++ b/fs/squashfs/namei.c
@@ -134,7 +134,7 @@ out:
 
 
 static struct dentry *squashfs_lookup(struct inode *dir, struct dentry *dentry,
-                                 struct nameidata *nd)
+                                 unsigned int flags)
 {
         const unsigned char *name = dentry->d_name.name;
         int len = dentry->d_name.len;
diff --git a/fs/super.c b/fs/super.c
index cf001775617f..c743fb3be4b8 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -105,11 +105,12 @@ static int prune_super(struct shrinker *shrink, struct shrink_control *sc)
 /**
  *      alloc_super     -       create new superblock
  *      @type:  filesystem type superblock should belong to
+ *      @flags: the mount flags
  *
  *      Allocates and initializes a new &struct super_block.  alloc_super()
  *      returns a pointer new superblock or %NULL if allocation had failed.
  */
-static struct super_block *alloc_super(struct file_system_type *type)
+static struct super_block *alloc_super(struct file_system_type *type, int flags)
 {
         struct super_block *s = kzalloc(sizeof(struct super_block),  GFP_USER);
         static const struct super_operations default_op;
@@ -136,6 +137,7 @@ static struct super_block *alloc_super(struct file_system_type *type)
 #else
                 INIT_LIST_HEAD(&s->s_files);
 #endif
+                s->s_flags = flags;
                 s->s_bdi = &default_backing_dev_info;
                 INIT_HLIST_NODE(&s->s_instances);
                 INIT_HLIST_BL_HEAD(&s->s_anon);
@@ -415,11 +417,13 @@ EXPORT_SYMBOL(generic_shutdown_super);
  *      @type:  filesystem type superblock should belong to
  *      @test:  comparison callback
  *      @set:   setup callback
+ *      @flags: mount flags
  *      @data:  argument to each of them
  */
 struct super_block *sget(struct file_system_type *type,
                         int (*test)(struct super_block *,void *),
                         int (*set)(struct super_block *,void *),
+                        int flags,
                         void *data)
 {
         struct super_block *s = NULL;
@@ -450,7 +454,7 @@ retry:
         }
         if (!s) {
                 spin_unlock(&sb_lock);
-                s = alloc_super(type);
+                s = alloc_super(type, flags);
                 if (!s)
                         return ERR_PTR(-ENOMEM);
                 goto retry;
@@ -925,13 +929,12 @@ struct dentry *mount_ns(struct file_system_type *fs_type, int flags,
 {
         struct super_block *sb;
 
-        sb = sget(fs_type, ns_test_super, ns_set_super, data);
+        sb = sget(fs_type, ns_test_super, ns_set_super, flags, data);
         if (IS_ERR(sb))
                 return ERR_CAST(sb);
 
         if (!sb->s_root) {
                 int err;
-                sb->s_flags = flags;
                 err = fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
                 if (err) {
                         deactivate_locked_super(sb);
@@ -992,7 +995,8 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
                 error = -EBUSY;
                 goto error_bdev;
         }
-        s = sget(fs_type, test_bdev_super, set_bdev_super, bdev);
+        s = sget(fs_type, test_bdev_super, set_bdev_super, flags | MS_NOSEC,
+                 bdev);
         mutex_unlock(&bdev->bd_fsfreeze_mutex);
         if (IS_ERR(s))
                 goto error_s;
@@ -1017,7 +1021,6 @@ struct dentry *mount_bdev(struct file_system_type *fs_type,
         } else {
                 char b[BDEVNAME_SIZE];
 
-                s->s_flags = flags | MS_NOSEC;
                 s->s_mode = mode;
                 strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
                 sb_set_blocksize(s, block_size(bdev));
@@ -1062,13 +1065,11 @@ struct dentry *mount_nodev(struct file_system_type *fs_type,
         int (*fill_super)(struct super_block *, void *, int))
 {
         int error;
-        struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
+        struct super_block *s = sget(fs_type, NULL, set_anon_super, flags, NULL);
 
         if (IS_ERR(s))
                 return ERR_CAST(s);
 
-        s->s_flags = flags;
-
         error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
         if (error) {
                 deactivate_locked_super(s);
@@ -1091,11 +1092,10 @@ struct dentry *mount_single(struct file_system_type *fs_type,
         struct super_block *s;
         int error;
 
-        s = sget(fs_type, compare_single, set_anon_super, NULL);
+        s = sget(fs_type, compare_single, set_anon_super, flags, NULL);
         if (IS_ERR(s))
                 return ERR_CAST(s);
         if (!s->s_root) {
-                s->s_flags = flags;
                 error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
                 if (error) {
                         deactivate_locked_super(s);
diff --git a/fs/sync.c b/fs/sync.c
index 11e3d1c44901..eb8722dc556f 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -29,16 +29,6 @@
  */
 static int __sync_filesystem(struct super_block *sb, int wait)
 {
-        /*
-         * This should be safe, as we require bdi backing to actually
-         * write out data in the first place
-         */
-        if (sb->s_bdi == &noop_backing_dev_info)
-                return 0;
-
-        if (sb->s_qcop && sb->s_qcop->quota_sync)
-                sb->s_qcop->quota_sync(sb, -1, wait);
-
         if (wait)
                 sync_inodes_sb(sb);
         else
@@ -77,29 +67,48 @@ int sync_filesystem(struct super_block *sb)
 }
 EXPORT_SYMBOL_GPL(sync_filesystem);
 
-static void sync_one_sb(struct super_block *sb, void *arg)
+static void sync_inodes_one_sb(struct super_block *sb, void *arg)
 {
         if (!(sb->s_flags & MS_RDONLY))
-                __sync_filesystem(sb, *(int *)arg);
+                sync_inodes_sb(sb);
 }
-/*
- * Sync all the data for all the filesystems (called by sys_sync() and
- * emergency sync)
- */
-static void sync_filesystems(int wait)
+
+static void sync_fs_one_sb(struct super_block *sb, void *arg)
 {
-        iterate_supers(sync_one_sb, &wait);
+        if (!(sb->s_flags & MS_RDONLY) && sb->s_op->sync_fs)
+                sb->s_op->sync_fs(sb, *(int *)arg);
+}
+
+static void fdatawrite_one_bdev(struct block_device *bdev, void *arg)
+{
+        filemap_fdatawrite(bdev->bd_inode->i_mapping);
+}
+
+static void fdatawait_one_bdev(struct block_device *bdev, void *arg)
+{
+        filemap_fdatawait(bdev->bd_inode->i_mapping);
 }
 
 /*
- * sync everything.  Start out by waking pdflush, because that writes back
- * all queues in parallel.
+ * Sync everything. We start by waking flusher threads so that most of
+ * writeback runs on all devices in parallel. Then we sync all inodes reliably
+ * which effectively also waits for all flusher threads to finish doing
+ * writeback. At this point all data is on disk so metadata should be stable
+ * and we tell filesystems to sync their metadata via ->sync_fs() calls.
+ * Finally, we writeout all block devices because some filesystems (e.g. ext2)
+ * just write metadata (such as inodes or bitmaps) to block device page cache
+ * and do not sync it on their own in ->sync_fs().
  */
 SYSCALL_DEFINE0(sync)
 {
+        int nowait = 0, wait = 1;
+
         wakeup_flusher_threads(0, WB_REASON_SYNC);
-        sync_filesystems(0);
-        sync_filesystems(1);
+        iterate_supers(sync_inodes_one_sb, NULL);
+        iterate_supers(sync_fs_one_sb, &nowait);
+        iterate_supers(sync_fs_one_sb, &wait);
+        iterate_bdevs(fdatawrite_one_bdev, NULL);
+        iterate_bdevs(fdatawait_one_bdev, NULL);
         if (unlikely(laptop_mode))
                 laptop_sync_completion();
         return 0;
@@ -107,12 +116,18 @@ SYSCALL_DEFINE0(sync)
 
 static void do_sync_work(struct work_struct *work)
 {
+        int nowait = 0;
+
         /*
          * Sync twice to reduce the possibility we skipped some inodes / pages
          * because they were temporarily locked
          */
-        sync_filesystems(0);
-        sync_filesystems(0);
+        iterate_supers(sync_inodes_one_sb, &nowait);
+        iterate_supers(sync_fs_one_sb, &nowait);
+        iterate_bdevs(fdatawrite_one_bdev, NULL);
+        iterate_supers(sync_inodes_one_sb, &nowait);
+        iterate_supers(sync_fs_one_sb, &nowait);
+        iterate_bdevs(fdatawrite_one_bdev, NULL);
         printk("Emergency Sync complete\n");
         kfree(work);
 }
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index e6bb9b2a4cbe..a5cf784f9cc2 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -300,15 +300,15 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
 static int sysfs_dentry_delete(const struct dentry *dentry)
 {
         struct sysfs_dirent *sd = dentry->d_fsdata;
-        return !!(sd->s_flags & SYSFS_FLAG_REMOVED);
+        return !(sd && !(sd->s_flags & SYSFS_FLAG_REMOVED));
 }
 
-static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
 {
         struct sysfs_dirent *sd;
         int is_dir;
 
-        if (nd->flags & LOOKUP_RCU)
+        if (flags & LOOKUP_RCU)
                 return -ECHILD;
 
         sd = dentry->d_fsdata;
@@ -355,18 +355,15 @@ out_bad:
         return 0;
 }
 
-static void sysfs_dentry_iput(struct dentry *dentry, struct inode *inode)
+static void sysfs_dentry_release(struct dentry *dentry)
 {
-        struct sysfs_dirent * sd = dentry->d_fsdata;
-
-        sysfs_put(sd);
-        iput(inode);
+        sysfs_put(dentry->d_fsdata);
 }
 
-static const struct dentry_operations sysfs_dentry_ops = {
+const struct dentry_operations sysfs_dentry_ops = {
         .d_revalidate   = sysfs_dentry_revalidate,
         .d_delete       = sysfs_dentry_delete,
-        .d_iput         = sysfs_dentry_iput,
+        .d_release      = sysfs_dentry_release,
 };
 
 struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
@@ -764,7 +761,7 @@ int sysfs_create_dir(struct kobject * kobj)
 }
 
 static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
-                                struct nameidata *nd)
+                                unsigned int flags)
 {
         struct dentry *ret = NULL;
         struct dentry *parent = dentry->d_parent;
@@ -786,6 +783,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
                 ret = ERR_PTR(-ENOENT);
                 goto out_unlock;
         }
+        dentry->d_fsdata = sysfs_get(sd);
 
         /* attach dentry and inode */
         inode = sysfs_get_inode(dir->i_sb, sd);
@@ -795,16 +793,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
         }
 
         /* instantiate and hash dentry */
-        ret = d_find_alias(inode);
-        if (!ret) {
-                d_set_d_op(dentry, &sysfs_dentry_ops);
-                dentry->d_fsdata = sysfs_get(sd);
-                d_add(dentry, inode);
-        } else {
-                d_move(ret, dentry);
-                iput(inode);
-        }
-
+        ret = d_materialise_unique(dentry, inode);
  out_unlock:
         mutex_unlock(&sysfs_mutex);
         return ret;
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 52c3bdb66a84..71eb7e253927 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -68,6 +68,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
         }
         root->d_fsdata = &sysfs_root;
         sb->s_root = root;
+        sb->s_d_op = &sysfs_dentry_ops;
         return 0;
 }
 
@@ -117,13 +118,12 @@ static struct dentry *sysfs_mount(struct file_system_type *fs_type,
         for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++)
                 info->ns[type] = kobj_ns_grab_current(type);
 
-        sb = sget(fs_type, sysfs_test_super, sysfs_set_super, info);
+        sb = sget(fs_type, sysfs_test_super, sysfs_set_super, flags, info);
         if (IS_ERR(sb) || sb->s_fs_info != info)
                 free_sysfs_super_info(info);
         if (IS_ERR(sb))
                 return ERR_CAST(sb);
         if (!sb->s_root) {
-                sb->s_flags = flags;
                 error = sysfs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
                 if (error) {
                         deactivate_locked_super(sb);
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 661a9639570b..d73c0932bbd6 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -157,6 +157,7 @@ extern struct kmem_cache *sysfs_dir_cachep;
  */
 extern struct mutex sysfs_mutex;
 extern spinlock_t sysfs_assoc_lock;
+extern const struct dentry_operations sysfs_dentry_ops;
 
 extern const struct file_operations sysfs_dir_operations;
 extern const struct inode_operations sysfs_dir_inode_operations;
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index 08d0b2568cd3..80e1e2b18df1 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -43,7 +43,6 @@ static int sysv_sync_fs(struct super_block *sb, int wait)
          * then attach current time stamp.
          * But if the filesystem was marked clean, keep it clean.
          */
-        sb->s_dirt = 0;
         old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
         if (sbi->s_type == FSTYPE_SYSV4) {
                 if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38 - old_time))
@@ -57,23 +56,12 @@ static int sysv_sync_fs(struct super_block *sb, int wait)
         return 0;
 }
 
-static void sysv_write_super(struct super_block *sb)
-{
-        if (!(sb->s_flags & MS_RDONLY))
-                sysv_sync_fs(sb, 1);
-        else
-                sb->s_dirt = 0;
-}
-
 static int sysv_remount(struct super_block *sb, int *flags, char *data)
 {
         struct sysv_sb_info *sbi = SYSV_SB(sb);
-        lock_super(sb);
+
         if (sbi->s_forced_ro)
                 *flags |= MS_RDONLY;
-        if (*flags & MS_RDONLY)
-                sysv_write_super(sb);
-        unlock_super(sb);
         return 0;
 }
 
@@ -81,9 +69,6 @@ static void sysv_put_super(struct super_block *sb)
 {
         struct sysv_sb_info *sbi = SYSV_SB(sb);
 
-        if (sb->s_dirt)
-                sysv_write_super(sb);
-
         if (!(sb->s_flags & MS_RDONLY)) {
                 /* XXX ext2 also updates the state here */
                 mark_buffer_dirty(sbi->s_bh1);
@@ -357,7 +342,6 @@ const struct super_operations sysv_sops = {
         .write_inode    = sysv_write_inode,
         .evict_inode    = sysv_evict_inode,
         .put_super      = sysv_put_super,
-        .write_super    = sysv_write_super,
         .sync_fs        = sysv_sync_fs,
         .remount_fs     = sysv_remount,
         .statfs         = sysv_statfs,
diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c
index d7466e293614..1c0d5f264767 100644
--- a/fs/sysv/namei.c
+++ b/fs/sysv/namei.c
@@ -43,7 +43,7 @@ const struct dentry_operations sysv_dentry_operations = {
         .d_hash         = sysv_hash,
 };
 
-static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
 {
         struct inode * inode = NULL;
         ino_t ino;
@@ -80,7 +80,7 @@ static int sysv_mknod(struct inode * dir, struct dentry * dentry, umode_t mode,
         return err;
 }
 
-static int sysv_create(struct inode * dir, struct dentry * dentry, umode_t mode, struct nameidata *nd)
+static int sysv_create(struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
 {
         return sysv_mknod(dir, dentry, mode, 0);
 }
diff --git a/fs/sysv/sysv.h b/fs/sysv/sysv.h
index 11b07672f6c5..0bc35fdc58e2 100644
--- a/fs/sysv/sysv.h
+++ b/fs/sysv/sysv.h
@@ -117,7 +117,6 @@ static inline void dirty_sb(struct super_block *sb)
         mark_buffer_dirty(sbi->s_bh1);
         if (sbi->s_bh1 != sbi->s_bh2)
                 mark_buffer_dirty(sbi->s_bh2);
-        sb->s_dirt = 1;
 }
 
 
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index a6d42efc76d2..b1cca89aeb68 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -184,7 +184,7 @@ static int dbg_check_name(const struct ubifs_info *c,
 }
 
 static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
-                                   struct nameidata *nd)
+                                   unsigned int flags)
 {
         int err;
         union ubifs_key key;
@@ -246,7 +246,7 @@ out:
 }
 
 static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                        struct nameidata *nd)
+                        bool excl)
 {
         struct inode *inode;
         struct ubifs_info *c = dir->i_sb->s_fs_info;
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 5862dd9d2784..1c766c39c038 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2136,7 +2136,7 @@ static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
 
         dbg_gen("opened ubi%d_%d", c->vi.ubi_num, c->vi.vol_id);
 
-        sb = sget(fs_type, sb_test, sb_set, c);
+        sb = sget(fs_type, sb_test, sb_set, flags, c);
         if (IS_ERR(sb)) {
                 err = PTR_ERR(sb);
                 kfree(c);
@@ -2153,7 +2153,6 @@ static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
                         goto out_deact;
                 }
         } else {
-                sb->s_flags = flags;
                 err = ubifs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
                 if (err)
                         goto out_deact;
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 18024178ac4c..544b2799a911 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -251,7 +251,7 @@ out_ok:
 }
 
 static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
-                                 struct nameidata *nd)
+                                 unsigned int flags)
 {
         struct inode *inode = NULL;
         struct fileIdentDesc cfi;
@@ -551,7 +551,7 @@ static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
 }
 
 static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                      struct nameidata *nd)
+                      bool excl)
 {
         struct udf_fileident_bh fibh;
         struct inode *inode;
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index 42694e11c23d..1b3e410bf334 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -116,7 +116,7 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
         ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
         if (sb->s_flags & MS_SYNCHRONOUS)
                 ubh_sync_block(UCPI_UBH(ucpi));
-        sb->s_dirt = 1;
+        ufs_mark_sb_dirty(sb);
         
         unlock_super (sb);
         UFSD("EXIT\n");
@@ -214,7 +214,7 @@ do_more:
                 goto do_more;
         }
 
-        sb->s_dirt = 1;
+        ufs_mark_sb_dirty(sb);
         unlock_super (sb);
         UFSD("EXIT\n");
         return;
@@ -557,7 +557,7 @@ static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
         ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
         if (sb->s_flags & MS_SYNCHRONOUS)
                 ubh_sync_block(UCPI_UBH(ucpi));
-        sb->s_dirt = 1;
+        ufs_mark_sb_dirty(sb);
 
         UFSD("EXIT, fragment %llu\n", (unsigned long long)fragment);
         
@@ -677,7 +677,7 @@ succed:
         ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
         if (sb->s_flags & MS_SYNCHRONOUS)
                 ubh_sync_block(UCPI_UBH(ucpi));
-        sb->s_dirt = 1;
+        ufs_mark_sb_dirty(sb);
 
         result += cgno * uspi->s_fpg;
         UFSD("EXIT3, result %llu\n", (unsigned long long)result);
diff --git a/fs/ufs/ialloc.c b/fs/ufs/ialloc.c
index 4ec5c1085a87..e84cbe21b986 100644
--- a/fs/ufs/ialloc.c
+++ b/fs/ufs/ialloc.c
@@ -116,7 +116,7 @@ void ufs_free_inode (struct inode * inode)
         if (sb->s_flags & MS_SYNCHRONOUS)
                 ubh_sync_block(UCPI_UBH(ucpi));
         
-        sb->s_dirt = 1;
+        ufs_mark_sb_dirty(sb);
         unlock_super (sb);
         UFSD("EXIT\n");
 }
@@ -288,7 +288,7 @@ cg_found:
         ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
         if (sb->s_flags & MS_SYNCHRONOUS)
                 ubh_sync_block(UCPI_UBH(ucpi));
-        sb->s_dirt = 1;
+        ufs_mark_sb_dirty(sb);
 
         inode->i_ino = cg * uspi->s_ipg + bit;
         inode_init_owner(inode, dir, mode);
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index a2281cadefa1..90d74b8f8eba 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -46,7 +46,7 @@ static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode)
         return err;
 }
 
-static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
 {
         struct inode * inode = NULL;
         ino_t ino;
@@ -71,7 +71,7 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, stru
  * with d_instantiate(). 
  */
 static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
         struct inode *inode;
         int err;
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 302f340d0071..444927e5706b 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -302,7 +302,7 @@ void ufs_error (struct super_block * sb, const char * function,
         if (!(sb->s_flags & MS_RDONLY)) {
                 usb1->fs_clean = UFS_FSBAD;
                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
-                sb->s_dirt = 1;
+                ufs_mark_sb_dirty(sb);
                 sb->s_flags |= MS_RDONLY;
         }
         va_start (args, fmt);
@@ -334,7 +334,7 @@ void ufs_panic (struct super_block * sb, const char * function,
         if (!(sb->s_flags & MS_RDONLY)) {
                 usb1->fs_clean = UFS_FSBAD;
                 ubh_mark_buffer_dirty(USPI_UBH(uspi));
-                sb->s_dirt = 1;
+                ufs_mark_sb_dirty(sb);
         }
         va_start (args, fmt);
         vsnprintf (error_buf, sizeof(error_buf), fmt, args);
@@ -691,6 +691,83 @@ static void ufs_put_super_internal(struct super_block *sb)
         UFSD("EXIT\n");
 }
 
+static int ufs_sync_fs(struct super_block *sb, int wait)
+{
+        struct ufs_sb_private_info * uspi;
+        struct ufs_super_block_first * usb1;
+        struct ufs_super_block_third * usb3;
+        unsigned flags;
+
+        lock_ufs(sb);
+        lock_super(sb);
+
+        UFSD("ENTER\n");
+
+        flags = UFS_SB(sb)->s_flags;
+        uspi = UFS_SB(sb)->s_uspi;
+        usb1 = ubh_get_usb_first(uspi);
+        usb3 = ubh_get_usb_third(uspi);
+
+        usb1->fs_time = cpu_to_fs32(sb, get_seconds());
+        if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
+            (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
+            (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
+                ufs_set_fs_state(sb, usb1, usb3,
+                                UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
+        ufs_put_cstotal(sb);
+
+        UFSD("EXIT\n");
+        unlock_super(sb);
+        unlock_ufs(sb);
+
+        return 0;
+}
+
+static void delayed_sync_fs(struct work_struct *work)
+{
+        struct ufs_sb_info *sbi;
+
+        sbi = container_of(work, struct ufs_sb_info, sync_work.work);
+
+        spin_lock(&sbi->work_lock);
+        sbi->work_queued = 0;
+        spin_unlock(&sbi->work_lock);
+
+        ufs_sync_fs(sbi->sb, 1);
+}
+
+void ufs_mark_sb_dirty(struct super_block *sb)
+{
+        struct ufs_sb_info *sbi = UFS_SB(sb);
+        unsigned long delay;
+
+        spin_lock(&sbi->work_lock);
+        if (!sbi->work_queued) {
+                delay = msecs_to_jiffies(dirty_writeback_interval * 10);
+                queue_delayed_work(system_long_wq, &sbi->sync_work, delay);
+                sbi->work_queued = 1;
+        }
+        spin_unlock(&sbi->work_lock);
+}
+
+static void ufs_put_super(struct super_block *sb)
+{
+        struct ufs_sb_info * sbi = UFS_SB(sb);
+
+        UFSD("ENTER\n");
+
+        if (!(sb->s_flags & MS_RDONLY))
+                ufs_put_super_internal(sb);
+        cancel_delayed_work_sync(&sbi->sync_work);
+
+        ubh_brelse_uspi (sbi->s_uspi);
+        kfree (sbi->s_uspi);
+        kfree (sbi);
+        sb->s_fs_info = NULL;
+        UFSD("EXIT\n");
+        return;
+}
+
 static int ufs_fill_super(struct super_block *sb, void *data, int silent)
 {
         struct ufs_sb_info * sbi;
@@ -716,6 +793,7 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
         if (!sbi)
                 goto failed_nomem;
         sb->s_fs_info = sbi;
+        sbi->sb = sb;
 
         UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
         
@@ -727,6 +805,8 @@ static int ufs_fill_super(struct super_block *sb, void *data, int silent)
         }
 #endif
         mutex_init(&sbi->mutex);
+        spin_lock_init(&sbi->work_lock);
+        INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
         /*
          * Set default mount options
          * Parse mount options
@@ -1191,68 +1271,6 @@ failed_nomem:
         return -ENOMEM;
 }
 
-static int ufs_sync_fs(struct super_block *sb, int wait)
-{
-        struct ufs_sb_private_info * uspi;
-        struct ufs_super_block_first * usb1;
-        struct ufs_super_block_third * usb3;
-        unsigned flags;
-
-        lock_ufs(sb);
-        lock_super(sb);
-
-        UFSD("ENTER\n");
-
-        flags = UFS_SB(sb)->s_flags;
-        uspi = UFS_SB(sb)->s_uspi;
-        usb1 = ubh_get_usb_first(uspi);
-        usb3 = ubh_get_usb_third(uspi);
-
-        usb1->fs_time = cpu_to_fs32(sb, get_seconds());
-        if ((flags & UFS_ST_MASK) == UFS_ST_SUN  ||
-            (flags & UFS_ST_MASK) == UFS_ST_SUNOS ||
-            (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
-                ufs_set_fs_state(sb, usb1, usb3,
-                                UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
-        ufs_put_cstotal(sb);
-        sb->s_dirt = 0;
-
-        UFSD("EXIT\n");
-        unlock_super(sb);
-        unlock_ufs(sb);
-
-        return 0;
-}
-
-static void ufs_write_super(struct super_block *sb)
-{
-        if (!(sb->s_flags & MS_RDONLY))
-                ufs_sync_fs(sb, 1);
-        else
-                sb->s_dirt = 0;
-}
-
-static void ufs_put_super(struct super_block *sb)
-{
-        struct ufs_sb_info * sbi = UFS_SB(sb);
-                
-        UFSD("ENTER\n");
-
-        if (sb->s_dirt)
-                ufs_write_super(sb);
-
-        if (!(sb->s_flags & MS_RDONLY))
-                ufs_put_super_internal(sb);
-        
-        ubh_brelse_uspi (sbi->s_uspi);
-        kfree (sbi->s_uspi);
-        kfree (sbi);
-        sb->s_fs_info = NULL;
-        UFSD("EXIT\n");
-        return;
-}
-
-
 static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 {
         struct ufs_sb_private_info * uspi;
@@ -1308,7 +1326,6 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
                         ufs_set_fs_state(sb, usb1, usb3,
                                 UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
                 ubh_mark_buffer_dirty (USPI_UBH(uspi));
-                sb->s_dirt = 0;
                 sb->s_flags |= MS_RDONLY;
         } else {
         /*
@@ -1458,7 +1475,6 @@ static const struct super_operations ufs_super_ops = {
         .write_inode    = ufs_write_inode,
         .evict_inode    = ufs_evict_inode,
         .put_super      = ufs_put_super,
-        .write_super    = ufs_write_super,
         .sync_fs        = ufs_sync_fs,
         .statfs         = ufs_statfs,
         .remount_fs     = ufs_remount,
diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h
index 528750b7e701..343e6fc571e5 100644
--- a/fs/ufs/ufs.h
+++ b/fs/ufs/ufs.h
@@ -20,6 +20,10 @@ struct ufs_sb_info {
         unsigned s_mount_opt;
         struct mutex mutex;
         struct task_struct *mutex_owner;
+        struct super_block *sb;
+        int work_queued; /* non-zero if the delayed work is queued */
+        struct delayed_work sync_work; /* FS sync delayed work */
+        spinlock_t work_lock; /* protects sync_work and work_queued */
 };
 
 struct ufs_inode_info {
@@ -123,6 +127,7 @@ extern __printf(3, 4)
 void ufs_error(struct super_block *, const char *, const char *, ...);
 extern __printf(3, 4)
 void ufs_panic(struct super_block *, const char *, const char *, ...);
+void ufs_mark_sb_dirty(struct super_block *sb);
 
 /* symlink.c */
 extern const struct inode_operations ufs_fast_symlink_inode_operations;
diff --git a/fs/ufs/ufs_fs.h b/fs/ufs/ufs_fs.h
index 8aba544f9fad..0cbd5d340b67 100644
--- a/fs/ufs/ufs_fs.h
+++ b/fs/ufs/ufs_fs.h
@@ -34,6 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/stat.h>
 #include <linux/fs.h>
+#include <linux/workqueue.h>
 
 #include <asm/div64.h>
 typedef __u64 __bitwise __fs64;
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 3a05a41b5d76..1f1535d25a9b 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -208,6 +208,7 @@ xfs_open_by_handle(
         struct inode            *inode;
         struct dentry           *dentry;
         fmode_t                 fmode;
+        struct path             path;
 
         if (!capable(CAP_SYS_ADMIN))
                 return -XFS_ERROR(EPERM);
@@ -252,8 +253,10 @@ xfs_open_by_handle(
                 goto out_dput;
         }
 
-        filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
-                           hreq->oflags, cred);
+        path.mnt = parfilp->f_path.mnt;
+        path.dentry = dentry;
+        filp = dentry_open(&path, hreq->oflags, cred);
+        dput(dentry);
         if (IS_ERR(filp)) {
                 put_unused_fd(fd);
                 return PTR_ERR(filp);
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 1a25fd802798..9c4340f5c3e0 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -179,7 +179,7 @@ xfs_vn_create(
         struct inode    *dir,
         struct dentry   *dentry,
         umode_t         mode,
-        struct nameidata *nd)
+        bool            flags)
 {
         return xfs_vn_mknod(dir, dentry, mode, 0);
 }
@@ -197,7 +197,7 @@ STATIC struct dentry *
 xfs_vn_lookup(
         struct inode    *dir,
         struct dentry   *dentry,
-        struct nameidata *nd)
+        unsigned int flags)
 {
         struct xfs_inode *cip;
         struct xfs_name name;
@@ -222,7 +222,7 @@ STATIC struct dentry *
 xfs_vn_ci_lookup(
         struct inode    *dir,
         struct dentry   *dentry,
-        struct nameidata *nd)
+        unsigned int flags)
 {
         struct xfs_inode *ip;
         struct xfs_name xname;
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 094789ff3e9f..caa34e50537e 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -128,7 +128,7 @@ struct dentry {
                 struct rcu_head d_rcu;
         } d_u;
         struct list_head d_subdirs;     /* our children */
-        struct list_head d_alias;       /* inode alias list */
+        struct hlist_node d_alias;      /* inode alias list */
 };
 
 /*
@@ -144,7 +144,7 @@ enum dentry_d_lock_class
 };
 
 struct dentry_operations {
-        int (*d_revalidate)(struct dentry *, struct nameidata *);
+        int (*d_revalidate)(struct dentry *, unsigned int);
         int (*d_hash)(const struct dentry *, const struct inode *,
                         struct qstr *);
         int (*d_compare)(const struct dentry *, const struct inode *,
diff --git a/include/linux/file.h b/include/linux/file.h
index 58bf158c53d9..a22408bac0d0 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -39,4 +39,7 @@ extern void put_unused_fd(unsigned int fd);
 
 extern void fd_install(unsigned int fd, struct file *file);
 
+extern void flush_delayed_fput(void);
+extern void __fput_sync(struct file *);
+
 #endif /* __LINUX_FILE_H */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 17fd887c798f..8fabb037a48d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -826,7 +826,7 @@ struct inode {
         struct list_head        i_lru;          /* inode LRU list */
         struct list_head        i_sb_list;
         union {
-                struct list_head        i_dentry;
+                struct hlist_head       i_dentry;
                 struct rcu_head         i_rcu;
         };
         u64                     i_version;
@@ -1571,7 +1571,7 @@ extern void unlock_super(struct super_block *);
 /*
  * VFS helper functions..
  */
-extern int vfs_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
+extern int vfs_create(struct inode *, struct dentry *, umode_t, bool);
 extern int vfs_mkdir(struct inode *, struct dentry *, umode_t);
 extern int vfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
 extern int vfs_symlink(struct inode *, struct dentry *, const char *);
@@ -1666,7 +1666,7 @@ struct file_operations {
 };
 
 struct inode_operations {
-        struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
+        struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
         void * (*follow_link) (struct dentry *, struct nameidata *);
         int (*permission) (struct inode *, int);
         struct posix_acl * (*get_acl)(struct inode *, int);
@@ -1674,7 +1674,7 @@ struct inode_operations {
         int (*readlink) (struct dentry *, char __user *,int);
         void (*put_link) (struct dentry *, struct nameidata *, void *);
 
-        int (*create) (struct inode *,struct dentry *,umode_t,struct nameidata *);
+        int (*create) (struct inode *,struct dentry *, umode_t, bool);
         int (*link) (struct dentry *,struct inode *,struct dentry *);
         int (*unlink) (struct inode *,struct dentry *);
         int (*symlink) (struct inode *,struct dentry *,const char *);
@@ -1693,6 +1693,9 @@ struct inode_operations {
         int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
                       u64 len);
         int (*update_time)(struct inode *, struct timespec *, int);
+        int (*atomic_open)(struct inode *, struct dentry *,
+                           struct file *, unsigned open_flag,
+                           umode_t create_mode, int *opened);
 } ____cacheline_aligned;
 
 struct seq_file;
@@ -1911,7 +1914,7 @@ void free_anon_bdev(dev_t);
 struct super_block *sget(struct file_system_type *type,
                         int (*test)(struct super_block *,void *),
                         int (*set)(struct super_block *,void *),
-                        void *data);
+                        int flags, void *data);
 extern struct dentry *mount_pseudo(struct file_system_type *, char *,
         const struct super_operations *ops,
         const struct dentry_operations *dops,
@@ -2057,10 +2060,17 @@ extern long do_sys_open(int dfd, const char __user *filename, int flags,
 extern struct file *filp_open(const char *, int, umode_t);
 extern struct file *file_open_root(struct dentry *, struct vfsmount *,
                                    const char *, int);
-extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
-                                 const struct cred *);
+extern struct file * dentry_open(const struct path *, int, const struct cred *);
 extern int filp_close(struct file *, fl_owner_t id);
 extern char * getname(const char __user *);
+enum {
+        FILE_CREATED = 1,
+        FILE_OPENED = 2
+};
+extern int finish_open(struct file *file, struct dentry *dentry,
+                        int (*open)(struct inode *, struct file *),
+                        int *opened);
+extern int finish_no_open(struct file *file, struct dentry *dentry);
 
 /* fs/ioctl.c */
 
@@ -2091,6 +2101,7 @@ extern sector_t blkdev_max_block(struct block_device *bdev);
 extern void bd_forget(struct inode *inode);
 extern void bdput(struct block_device *);
 extern void invalidate_bdev(struct block_device *);
+extern void iterate_bdevs(void (*)(struct block_device *, void *), void *);
 extern int sync_blockdev(struct block_device *bdev);
 extern void kill_bdev(struct block_device *);
 extern struct super_block *freeze_bdev(struct block_device *);
@@ -2112,6 +2123,10 @@ static inline int thaw_bdev(struct block_device *bdev, struct super_block *sb)
 {
         return 0;
 }
+
+static inline void iterate_bdevs(void (*f)(struct block_device *, void *), void *arg)
+{
+}
 #endif
 extern int sync_filesystem(struct super_block *);
 extern const struct file_operations def_blk_fops;
@@ -2438,7 +2453,7 @@ extern loff_t noop_llseek(struct file *file, loff_t offset, int origin);
 extern loff_t no_llseek(struct file *file, loff_t offset, int origin);
 extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
 extern loff_t generic_file_llseek_size(struct file *file, loff_t offset,
-                int origin, loff_t maxsize);
+                int origin, loff_t maxsize, loff_t eof);
 extern int generic_file_open(struct inode * inode, struct file * filp);
 extern int nonseekable_open(struct inode * inode, struct file * filp);
 
@@ -2560,7 +2575,7 @@ extern int simple_write_end(struct file *file, struct address_space *mapping,
                         loff_t pos, unsigned len, unsigned copied,
                         struct page *page, void *fsdata);
 
-extern struct dentry *simple_lookup(struct inode *, struct dentry *, struct nameidata *);
+extern struct dentry *simple_lookup(struct inode *, struct dentry *, unsigned int flags);
 extern ssize_t generic_read_dir(struct file *, char __user *, size_t, loff_t *);
 extern const struct file_operations simple_dir_operations;
 extern const struct inode_operations simple_dir_inode_operations;
diff --git a/include/linux/namei.h b/include/linux/namei.h
index ffc02135c483..d2ef8b34b967 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -7,12 +7,6 @@
 
 struct vfsmount;
 
-struct open_intent {
-        int     flags;
-        int     create_mode;
-        struct file *file;
-};
-
 enum { MAX_NESTED_LINKS = 8 };
 
 struct nameidata {
@@ -25,11 +19,6 @@ struct nameidata {
         int             last_type;
         unsigned        depth;
         char *saved_names[MAX_NESTED_LINKS + 1];
-
-        /* Intent data */
-        union {
-                struct open_intent open;
-        } intent;
 };
 
 /*
@@ -78,13 +67,10 @@ extern int kern_path(const char *, unsigned, struct path *);
 
 extern struct dentry *kern_path_create(int, const char *, struct path *, int);
 extern struct dentry *user_path_create(int, const char __user *, struct path *, int);
-extern int kern_path_parent(const char *, struct nameidata *);
+extern struct dentry *kern_path_locked(const char *, struct path *);
 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
                            const char *, unsigned int, struct path *);
 
-extern struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
-                int (*open)(struct inode *, struct file *));
-
 extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
 
 extern int follow_down_one(struct path *);
@@ -94,6 +80,8 @@ extern int follow_up(struct path *);
 extern struct dentry *lock_rename(struct dentry *, struct dentry *);
 extern void unlock_rename(struct dentry *, struct dentry *);
 
+extern void nd_jump_link(struct nameidata *nd, struct path *path);
+
 static inline void nd_set_link(struct nameidata *nd, char *path)
 {
         nd->saved_names[nd->depth] = path;
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 8aadd90b808a..d3b7c18b18f4 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1374,7 +1374,7 @@ struct nfs_rpc_ops {
         int     (*readlink)(struct inode *, struct page *, unsigned int,
                             unsigned int);
         int     (*create)  (struct inode *, struct dentry *,
-                            struct iattr *, int, struct nfs_open_context *);
+                            struct iattr *, int);
         int     (*remove)  (struct inode *, struct qstr *);
         void    (*unlink_setup)  (struct rpc_message *, struct inode *dir);
         void    (*unlink_rpc_prepare) (struct rpc_task *, struct nfs_unlinkdata *);
diff --git a/include/linux/quota.h b/include/linux/quota.h
index c09fa042b5ea..524ede8a160a 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -333,7 +333,7 @@ struct quotactl_ops {
         int (*quota_on)(struct super_block *, int, int, struct path *);
         int (*quota_on_meta)(struct super_block *, int, int);
         int (*quota_off)(struct super_block *, int);
-        int (*quota_sync)(struct super_block *, int, int);
+        int (*quota_sync)(struct super_block *, int);
         int (*get_info)(struct super_block *, int, struct if_dqinfo *);
         int (*set_info)(struct super_block *, int, struct if_dqinfo *);
         int (*get_dqblk)(struct super_block *, int, qid_t, struct fs_disk_quota *);
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 17b977304a09..ec6b65feaaba 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -83,7 +83,8 @@ int dquot_quota_on(struct super_block *sb, int type, int format_id,
 int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
         int format_id, int type);
 int dquot_quota_off(struct super_block *sb, int type);
-int dquot_quota_sync(struct super_block *sb, int type, int wait);
+int dquot_writeback_dquots(struct super_block *sb, int type);
+int dquot_quota_sync(struct super_block *sb, int type);
 int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
 int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
 int dquot_get_dqblk(struct super_block *sb, int type, qid_t id,
@@ -255,6 +256,11 @@ static inline int dquot_resume(struct super_block *sb, int type)
 
 #define dquot_file_open         generic_file_open
 
+static inline int dquot_writeback_dquots(struct super_block *sb, int type)
+{
+        return 0;
+}
+
 #endif /* CONFIG_QUOTA */
 
 static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 64d9df5c3a49..1a2ebd39b800 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1405,7 +1405,7 @@ struct task_struct {
         int (*notifier)(void *priv);
         void *notifier_data;
         sigset_t *notifier_mask;
-        struct hlist_head task_works;
+        struct callback_head *task_works;
 
         struct audit_context *audit_context;
 #ifdef CONFIG_AUDITSYSCALL
@@ -1546,7 +1546,6 @@ struct task_struct {
         unsigned long timer_slack_ns;
         unsigned long default_timer_slack_ns;
 
-        struct list_head        *scm_work_list;
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
         /* Index of current stored address in ret_stack */
         int curr_ret_stack;
diff --git a/include/linux/task_work.h b/include/linux/task_work.h
index 294d5d5e90b1..fb46b03b1852 100644
--- a/include/linux/task_work.h
+++ b/include/linux/task_work.h
@@ -4,29 +4,21 @@
 #include <linux/list.h>
 #include <linux/sched.h>
 
-struct task_work;
-typedef void (*task_work_func_t)(struct task_work *);
-
-struct task_work {
-        struct hlist_node hlist;
-        task_work_func_t func;
-        void *data;
-};
+typedef void (*task_work_func_t)(struct callback_head *);
 
 static inline void
-init_task_work(struct task_work *twork, task_work_func_t func, void *data)
+init_task_work(struct callback_head *twork, task_work_func_t func)
 {
         twork->func = func;
-        twork->data = data;
 }
 
-int task_work_add(struct task_struct *task, struct task_work *twork, bool);
-struct task_work *task_work_cancel(struct task_struct *, task_work_func_t);
+int task_work_add(struct task_struct *task, struct callback_head *twork, bool);
+struct callback_head *task_work_cancel(struct task_struct *, task_work_func_t);
 void task_work_run(void);
 
 static inline void exit_task_work(struct task_struct *task)
 {
-        if (unlikely(!hlist_empty(&task->task_works)))
+        if (unlikely(task->task_works))
                 task_work_run();
 }
 
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index 6a4d82bedb03..1e98b5530425 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -192,7 +192,7 @@ static inline void tracehook_notify_resume(struct pt_regs *regs)
          * hlist_add_head(task->task_works);
          */
         smp_mb__after_clear_bit();
-        if (unlikely(!hlist_empty(&current->task_works)))
+        if (unlikely(current->task_works))
                 task_work_run();
 }
 
diff --git a/include/linux/types.h b/include/linux/types.h
index 9c1bd539ea70..bf0dd7524b2a 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -246,14 +246,15 @@ struct ustat {
 };
 
 /**
- * struct rcu_head - callback structure for use with RCU
+ * struct callback_head - callback structure for use with RCU and task_work
  * @next: next update requests in a list
  * @func: actual update function to call after the grace period.
  */
-struct rcu_head {
-        struct rcu_head *next;
-        void (*func)(struct rcu_head *head);
+struct callback_head {
+        struct callback_head *next;
+        void (*func)(struct callback_head *head);
 };
+#define rcu_head callback_head
 
 #endif  /* __KERNEL__ */
 #endif /*  __ASSEMBLY__ */
diff --git a/include/net/scm.h b/include/net/scm.h
index d456f4c71a32..079d7887dac1 100644
--- a/include/net/scm.h
+++ b/include/net/scm.h
@@ -13,7 +13,6 @@
 #define SCM_MAX_FD      253
 
 struct scm_fp_list {
-        struct list_head        list;
         short                   count;
         short                   max;
         struct file             *fp[SCM_MAX_FD];
diff --git a/init/main.c b/init/main.c
index b5cc0a7c4708..3f151f6c6da7 100644
--- a/init/main.c
+++ b/init/main.c
@@ -68,6 +68,7 @@
 #include <linux/shmem_fs.h>
 #include <linux/slab.h>
 #include <linux/perf_event.h>
+#include <linux/file.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
@@ -804,8 +805,8 @@ static noinline int init_post(void)
         system_state = SYSTEM_RUNNING;
         numa_default_policy();
 
-
         current->signal->flags |= SIGNAL_UNKILLABLE;
+        flush_delayed_fput();
 
         if (ramdisk_execute_command) {
                 run_init_process(ramdisk_execute_command);
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 8ce57691e7b6..f8e54f5b9080 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -413,7 +413,7 @@ static void mqueue_evict_inode(struct inode *inode)
 }
 
 static int mqueue_create(struct inode *dir, struct dentry *dentry,
-                                umode_t mode, struct nameidata *nd)
+                                umode_t mode, bool excl)
 {
         struct inode *inode;
         struct mq_attr *attr = dentry->d_fsdata;
@@ -721,8 +721,8 @@ static int mq_attr_ok(struct ipc_namespace *ipc_ns, struct mq_attr *attr)
 /*
  * Invoked when creating a new queue via sys_mq_open
  */
-static struct file *do_create(struct ipc_namespace *ipc_ns, struct dentry *dir,
-                        struct dentry *dentry, int oflag, umode_t mode,
+static struct file *do_create(struct ipc_namespace *ipc_ns, struct inode *dir,
+                        struct path *path, int oflag, umode_t mode,
                         struct mq_attr *attr)
 {
         const struct cred *cred = current_cred();
@@ -732,9 +732,9 @@ static struct file *do_create(struct ipc_namespace *ipc_ns, struct dentry *dir,
         if (attr) {
                 ret = mq_attr_ok(ipc_ns, attr);
                 if (ret)
-                        goto out;
+                        return ERR_PTR(ret);
                 /* store for use during create */
-                dentry->d_fsdata = attr;
+                path->dentry->d_fsdata = attr;
         } else {
                 struct mq_attr def_attr;
 
@@ -744,71 +744,51 @@ static struct file *do_create(struct ipc_namespace *ipc_ns, struct dentry *dir,
                                           ipc_ns->mq_msgsize_default);
                 ret = mq_attr_ok(ipc_ns, &def_attr);
                 if (ret)
-                        goto out;
+                        return ERR_PTR(ret);
         }
 
         mode &= ~current_umask();
-        ret = mnt_want_write(ipc_ns->mq_mnt);
+        ret = mnt_want_write(path->mnt);
         if (ret)
-                goto out;
-        ret = vfs_create(dir->d_inode, dentry, mode, NULL);
-        dentry->d_fsdata = NULL;
-        if (ret)
-                goto out_drop_write;
-
-        result = dentry_open(dentry, ipc_ns->mq_mnt, oflag, cred);
+                return ERR_PTR(ret);
+        ret = vfs_create(dir, path->dentry, mode, true);
+        path->dentry->d_fsdata = NULL;
+        if (!ret)
+                result = dentry_open(path, oflag, cred);
+        else
+                result = ERR_PTR(ret);
         /*
          * dentry_open() took a persistent mnt_want_write(),
          * so we can now drop this one.
          */
-        mnt_drop_write(ipc_ns->mq_mnt);
+        mnt_drop_write(path->mnt);
         return result;
-
-out_drop_write:
-        mnt_drop_write(ipc_ns->mq_mnt);
-out:
-        dput(dentry);
-        mntput(ipc_ns->mq_mnt);
-        return ERR_PTR(ret);
 }
 
 /* Opens existing queue */
-static struct file *do_open(struct ipc_namespace *ipc_ns,
-                                struct dentry *dentry, int oflag)
+static struct file *do_open(struct path *path, int oflag)
 {
-        int ret;
-        const struct cred *cred = current_cred();
-
         static const int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
                                                   MAY_READ | MAY_WRITE };
-
-        if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY)) {
-                ret = -EINVAL;
-                goto err;
-        }
-
-        if (inode_permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE])) {
-                ret = -EACCES;
-                goto err;
-        }
-
-        return dentry_open(dentry, ipc_ns->mq_mnt, oflag, cred);
-
-err:
-        dput(dentry);
-        mntput(ipc_ns->mq_mnt);
-        return ERR_PTR(ret);
+        int acc;
+        if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY))
+                return ERR_PTR(-EINVAL);
+        acc = oflag2acc[oflag & O_ACCMODE];
+        if (inode_permission(path->dentry->d_inode, acc))
+                return ERR_PTR(-EACCES);
+        return dentry_open(path, oflag, current_cred());
 }
 
 SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
                 struct mq_attr __user *, u_attr)
 {
-        struct dentry *dentry;
+        struct path path;
         struct file *filp;
         char *name;
         struct mq_attr attr;
         int fd, error;
         struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
+        struct dentry *root = ipc_ns->mq_mnt->mnt_root;
 
         if (u_attr && copy_from_user(&attr, u_attr, sizeof(struct mq_attr)))
                 return -EFAULT;
@@ -822,52 +802,49 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
         if (fd < 0)
                 goto out_putname;
 
-        mutex_lock(&ipc_ns->mq_mnt->mnt_root->d_inode->i_mutex);
-        dentry = lookup_one_len(name, ipc_ns->mq_mnt->mnt_root, strlen(name));
-        if (IS_ERR(dentry)) {
-                error = PTR_ERR(dentry);
+        error = 0;
+        mutex_lock(&root->d_inode->i_mutex);
+        path.dentry = lookup_one_len(name, root, strlen(name));
+        if (IS_ERR(path.dentry)) {
+                error = PTR_ERR(path.dentry);
                 goto out_putfd;
         }
-        mntget(ipc_ns->mq_mnt);
+        path.mnt = mntget(ipc_ns->mq_mnt);
 
         if (oflag & O_CREAT) {
-                if (dentry->d_inode) {  /* entry already exists */
-                        audit_inode(name, dentry);
+                if (path.dentry->d_inode) {     /* entry already exists */
+                        audit_inode(name, path.dentry);
                         if (oflag & O_EXCL) {
                                 error = -EEXIST;
                                 goto out;
                         }
-                        filp = do_open(ipc_ns, dentry, oflag);
+                        filp = do_open(&path, oflag);
                 } else {
-                        filp = do_create(ipc_ns, ipc_ns->mq_mnt->mnt_root,
-                                                dentry, oflag, mode,
+                        filp = do_create(ipc_ns, root->d_inode,
+                                                &path, oflag, mode,
                                                 u_attr ? &attr : NULL);
                 }
         } else {
-                if (!dentry->d_inode) {
+                if (!path.dentry->d_inode) {
                         error = -ENOENT;
                         goto out;
                 }
-                audit_inode(name, dentry);
-                filp = do_open(ipc_ns, dentry, oflag);
+                audit_inode(name, path.dentry);
+                filp = do_open(&path, oflag);
         }
 
-        if (IS_ERR(filp)) {
+        if (!IS_ERR(filp))
+                fd_install(fd, filp);
+        else
                 error = PTR_ERR(filp);
-                goto out_putfd;
-        }
-
-        fd_install(fd, filp);
-        goto out_upsem;
-
 out:
-        dput(dentry);
-        mntput(ipc_ns->mq_mnt);
+        path_put(&path);
 out_putfd:
-        put_unused_fd(fd);
-        fd = error;
-out_upsem:
-        mutex_unlock(&ipc_ns->mq_mnt->mnt_root->d_inode->i_mutex);
+        if (error) {
+                put_unused_fd(fd);
+                fd = error;
+        }
+        mutex_unlock(&root->d_inode->i_mutex);
 out_putname:
         putname(name);
         return fd;
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 5bf0790497e7..3a5ca582ba1e 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -595,7 +595,7 @@ void audit_trim_trees(void)
 
                 root_mnt = collect_mounts(&path);
                 path_put(&path);
-                if (!root_mnt)
+                if (IS_ERR(root_mnt))
                         goto skip_it;
 
                 spin_lock(&hash_lock);
@@ -669,8 +669,8 @@ int audit_add_tree_rule(struct audit_krule *rule)
                 goto Err;
         mnt = collect_mounts(&path);
         path_put(&path);
-        if (!mnt) {
-                err = -ENOMEM;
+        if (IS_ERR(mnt)) {
+                err = PTR_ERR(mnt);
                 goto Err;
         }
 
@@ -719,8 +719,8 @@ int audit_tag_tree(char *old, char *new)
                 return err;
         tagged = collect_mounts(&path2);
         path_put(&path2);
-        if (!tagged)
-                return -ENOMEM;
+        if (IS_ERR(tagged))
+                return PTR_ERR(tagged);
 
         err = kern_path(old, 0, &path1);
         if (err) {
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index e683869365d9..3823281401b5 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -355,34 +355,15 @@ static void audit_remove_parent_watches(struct audit_parent *parent)
 /* Get path information necessary for adding watches. */
 static int audit_get_nd(struct audit_watch *watch, struct path *parent)
 {
-        struct nameidata nd;
-        struct dentry *d;
-        int err;
-
-        err = kern_path_parent(watch->path, &nd);
-        if (err)
-                return err;
-
-        if (nd.last_type != LAST_NORM) {
-                path_put(&nd.path);
-                return -EINVAL;
-        }
-
-        mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
-        d = lookup_one_len(nd.last.name, nd.path.dentry, nd.last.len);
-        if (IS_ERR(d)) {
-                mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-                path_put(&nd.path);
+        struct dentry *d = kern_path_locked(watch->path, parent);
+        if (IS_ERR(d))
                 return PTR_ERR(d);
-        }
+        mutex_unlock(&parent->dentry->d_inode->i_mutex);
         if (d->d_inode) {
                 /* update watch filter fields */
                 watch->dev = d->d_inode->i_sb->s_dev;
                 watch->ino = d->d_inode->i_ino;
         }
-        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-
-        *parent = nd.path;
         dput(d);
         return 0;
 }
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index b303dfc7dce0..af2b5641fc8b 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -822,7 +822,7 @@ EXPORT_SYMBOL_GPL(cgroup_unlock);
  */
 
 static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
-static struct dentry *cgroup_lookup(struct inode *, struct dentry *, struct nameidata *);
+static struct dentry *cgroup_lookup(struct inode *, struct dentry *, unsigned int);
 static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry);
 static int cgroup_populate_dir(struct cgroup *cgrp);
 static const struct inode_operations cgroup_dir_inode_operations;
@@ -1587,7 +1587,7 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type,
         opts.new_root = new_root;
 
         /* Locate an existing or new sb for this hierarchy */
-        sb = sget(fs_type, cgroup_test_super, cgroup_set_super, &opts);
+        sb = sget(fs_type, cgroup_test_super, cgroup_set_super, 0, &opts);
         if (IS_ERR(sb)) {
                 ret = PTR_ERR(sb);
                 cgroup_drop_root(opts.new_root);
@@ -2570,7 +2570,7 @@ static const struct inode_operations cgroup_dir_inode_operations = {
         .rename = cgroup_rename,
 };
 
-static struct dentry *cgroup_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *cgroup_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
         if (dentry->d_name.len > NAME_MAX)
                 return ERR_PTR(-ENAMETOOLONG);
diff --git a/kernel/exit.c b/kernel/exit.c
index 2f59cc334516..d17f6c4ddfa9 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -953,14 +953,11 @@ void do_exit(long code)
         exit_signals(tsk);  /* sets PF_EXITING */
         /*
          * tsk->flags are checked in the futex code to protect against
-         * an exiting task cleaning up the robust pi futexes, and in
-         * task_work_add() to avoid the race with exit_task_work().
+         * an exiting task cleaning up the robust pi futexes.
          */
         smp_mb();
         raw_spin_unlock_wait(&tsk->pi_lock);
 
-        exit_task_work(tsk);
-
         if (unlikely(in_atomic()))
                 printk(KERN_INFO "note: %s[%d] exited with preempt_count %d\n",
                                 current->comm, task_pid_nr(current),
@@ -995,6 +992,7 @@ void do_exit(long code)
         exit_shm(tsk);
         exit_files(tsk);
         exit_fs(tsk);
+        exit_task_work(tsk);
         check_stack_usage();
         exit_thread();
 
diff --git a/kernel/fork.c b/kernel/fork.c
index f00e319d8376..ff1cad3b7bdc 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1420,7 +1420,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
          */
         p->group_leader = p;
         INIT_LIST_HEAD(&p->thread_group);
-        INIT_HLIST_HEAD(&p->task_works);
+        p->task_works = NULL;
 
         /* Now that the task is set up, run cgroup callbacks if
          * necessary. We need to run them before the task is visible
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 8c548232ba39..814c9ef6bba1 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -781,7 +781,7 @@ static void wake_threads_waitq(struct irq_desc *desc)
                 wake_up(&desc->wait_for_threads);
 }
 
-static void irq_thread_dtor(struct task_work *unused)
+static void irq_thread_dtor(struct callback_head *unused)
 {
         struct task_struct *tsk = current;
         struct irq_desc *desc;
@@ -813,7 +813,7 @@ static void irq_thread_dtor(struct task_work *unused)
  */
 static int irq_thread(void *data)
 {
-        struct task_work on_exit_work;
+        struct callback_head on_exit_work;
         static const struct sched_param param = {
                 .sched_priority = MAX_USER_RT_PRIO/2,
         };
@@ -830,7 +830,7 @@ static int irq_thread(void *data)
 
         sched_setscheduler(current, SCHED_FIFO, &param);
 
-        init_task_work(&on_exit_work, irq_thread_dtor, NULL);
+        init_task_work(&on_exit_work, irq_thread_dtor);
         task_work_add(current, &on_exit_work, false);
 
         while (!irq_wait_for_interrupt(action)) {
diff --git a/kernel/signal.c b/kernel/signal.c
index 677102789cf2..be4f856d52f8 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1971,6 +1971,13 @@ static void ptrace_do_notify(int signr, int exit_code, int why)
 void ptrace_notify(int exit_code)
 {
         BUG_ON((exit_code & (0x7f | ~0xffff)) != SIGTRAP);
+        if (unlikely(current->task_works)) {
+                if (test_and_clear_ti_thread_flag(current_thread_info(),
+                                                   TIF_NOTIFY_RESUME)) {
+                        smp_mb__after_clear_bit();
+                        task_work_run();
+                }
+        }
 
         spin_lock_irq(&current->sighand->siglock);
         ptrace_do_notify(SIGTRAP, exit_code, CLD_TRAPPED);
@@ -2191,6 +2198,14 @@ int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka,
         struct signal_struct *signal = current->signal;
         int signr;
 
+        if (unlikely(current->task_works)) {
+                if (test_and_clear_ti_thread_flag(current_thread_info(),
+                                                   TIF_NOTIFY_RESUME)) {
+                        smp_mb__after_clear_bit();
+                        task_work_run();
+                }
+        }
+
         if (unlikely(uprobe_deny_signal()))
                 return 0;
 
diff --git a/kernel/task_work.c b/kernel/task_work.c
index 82d1c794066d..91d4e1742a0c 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -3,82 +3,78 @@
 #include <linux/tracehook.h>
 
 int
-task_work_add(struct task_struct *task, struct task_work *twork, bool notify)
+task_work_add(struct task_struct *task, struct callback_head *twork, bool notify)
 {
+        struct callback_head *last, *first;
         unsigned long flags;
-        int err = -ESRCH;
 
-#ifndef TIF_NOTIFY_RESUME
-        if (notify)
-                return -ENOTSUPP;
-#endif
         /*
-         * We must not insert the new work if the task has already passed
-         * exit_task_work(). We rely on do_exit()->raw_spin_unlock_wait()
-         * and check PF_EXITING under pi_lock.
+         * Not inserting the new work if the task has already passed
+         * exit_task_work() is the responisbility of callers.
          */
         raw_spin_lock_irqsave(&task->pi_lock, flags);
-        if (likely(!(task->flags & PF_EXITING))) {
-                hlist_add_head(&twork->hlist, &task->task_works);
-                err = 0;
-        }
+        last = task->task_works;
+        first = last ? last->next : twork;
+        twork->next = first;
+        if (last)
+                last->next = twork;
+        task->task_works = twork;
         raw_spin_unlock_irqrestore(&task->pi_lock, flags);
 
         /* test_and_set_bit() implies mb(), see tracehook_notify_resume(). */
-        if (likely(!err) && notify)
+        if (notify)
                 set_notify_resume(task);
-        return err;
+        return 0;
 }
 
-struct task_work *
+struct callback_head *
 task_work_cancel(struct task_struct *task, task_work_func_t func)
 {
         unsigned long flags;
-        struct task_work *twork;
-        struct hlist_node *pos;
+        struct callback_head *last, *res = NULL;
 
         raw_spin_lock_irqsave(&task->pi_lock, flags);
-        hlist_for_each_entry(twork, pos, &task->task_works, hlist) {
-                if (twork->func == func) {
-                        hlist_del(&twork->hlist);
-                        goto found;
+        last = task->task_works;
+        if (last) {
+                struct callback_head *q = last, *p = q->next;
+                while (1) {
+                        if (p->func == func) {
+                                q->next = p->next;
+                                if (p == last)
+                                        task->task_works = q == p ? NULL : q;
+                                res = p;
+                                break;
+                        }
+                        if (p == last)
+                                break;
+                        q = p;
+                        p = q->next;
                 }
         }
-        twork = NULL;
- found:
         raw_spin_unlock_irqrestore(&task->pi_lock, flags);
-
-        return twork;
+        return res;
 }
 
 void task_work_run(void)
 {
         struct task_struct *task = current;
-        struct hlist_head task_works;
-        struct hlist_node *pos;
+        struct callback_head *p, *q;
 
-        raw_spin_lock_irq(&task->pi_lock);
-        hlist_move_list(&task->task_works, &task_works);
-        raw_spin_unlock_irq(&task->pi_lock);
+        while (1) {
+                raw_spin_lock_irq(&task->pi_lock);
+                p = task->task_works;
+                task->task_works = NULL;
+                raw_spin_unlock_irq(&task->pi_lock);
 
-        if (unlikely(hlist_empty(&task_works)))
-                return;
-        /*
-         * We use hlist to save the space in task_struct, but we want fifo.
-         * Find the last entry, the list should be short, then process them
-         * in reverse order.
-         */
-        for (pos = task_works.first; pos->next; pos = pos->next)
-                ;
+                if (unlikely(!p))
+                        return;
 
-        for (;;) {
-                struct hlist_node **pprev = pos->pprev;
-                struct task_work *twork = container_of(pos, struct task_work,
-                                                        hlist);
-                twork->func(twork);
-
-                if (pprev == &task_works.first)
-                        break;
-                pos = container_of(pprev, struct hlist_node, next);
+                q = p->next; /* head */
+                p->next = NULL; /* cut it */
+                while (q) {
+                        p = q->next;
+                        q->func(q);
+                        q = p;
+                }
         }
 }
diff --git a/mm/shmem.c b/mm/shmem.c
index bd106361be4b..c15b998e5a86 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1877,7 +1877,7 @@ static int shmem_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 }
 
 static int shmem_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-                struct nameidata *nd)
+                bool excl)
 {
         return shmem_mknod(dir, dentry, mode | S_IFREG, 0);
 }
diff --git a/net/core/scm.c b/net/core/scm.c
index 611c5efd4cb0..8f6ccfd68ef4 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -109,25 +109,9 @@ void __scm_destroy(struct scm_cookie *scm)
 
         if (fpl) {
                 scm->fp = NULL;
-                if (current->scm_work_list) {
-                        list_add_tail(&fpl->list, current->scm_work_list);
-                } else {
-                        LIST_HEAD(work_list);
-
-                        current->scm_work_list = &work_list;
-
-                        list_add(&fpl->list, &work_list);
-                        while (!list_empty(&work_list)) {
-                                fpl = list_first_entry(&work_list, struct scm_fp_list, list);
-
-                                list_del(&fpl->list);
-                                for (i=fpl->count-1; i>=0; i--)
-                                        fput(fpl->fp[i]);
-                                kfree(fpl);
-                        }
-
-                        current->scm_work_list = NULL;
-                }
+                for (i=fpl->count-1; i>=0; i--)
+                        fput(fpl->fp[i]);
+                kfree(fpl);
         }
 }
 EXPORT_SYMBOL(__scm_destroy);
diff --git a/security/keys/internal.h b/security/keys/internal.h
index 3dcbf86b0d31..c246ba5d43ab 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -149,7 +149,7 @@ extern key_ref_t lookup_user_key(key_serial_t id, unsigned long flags,
 #define KEY_LOOKUP_FOR_UNLINK   0x04
 
 extern long join_session_keyring(const char *name);
-extern void key_change_session_keyring(struct task_work *twork);
+extern void key_change_session_keyring(struct callback_head *twork);
 
 extern struct work_struct key_gc_work;
 extern unsigned key_gc_delay;
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 0f5b3f027299..f1b59ae39d7e 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -1456,7 +1456,7 @@ long keyctl_session_to_parent(void)
 {
         struct task_struct *me, *parent;
         const struct cred *mycred, *pcred;
-        struct task_work *newwork, *oldwork;
+        struct callback_head *newwork, *oldwork;
         key_ref_t keyring_r;
         struct cred *cred;
         int ret;
@@ -1466,19 +1466,17 @@ long keyctl_session_to_parent(void)
                 return PTR_ERR(keyring_r);
 
         ret = -ENOMEM;
-        newwork = kmalloc(sizeof(struct task_work), GFP_KERNEL);
-        if (!newwork)
-                goto error_keyring;
 
         /* our parent is going to need a new cred struct, a new tgcred struct
          * and new security data, so we allocate them here to prevent ENOMEM in
          * our parent */
         cred = cred_alloc_blank();
         if (!cred)
-                goto error_newwork;
+                goto error_keyring;
+        newwork = &cred->rcu;
 
         cred->tgcred->session_keyring = key_ref_to_ptr(keyring_r);
-        init_task_work(newwork, key_change_session_keyring, cred);
+        init_task_work(newwork, key_change_session_keyring);
 
         me = current;
         rcu_read_lock();
@@ -1488,6 +1486,7 @@ long keyctl_session_to_parent(void)
         oldwork = NULL;
         parent = me->real_parent;
 
+        task_lock(parent);
         /* the parent mustn't be init and mustn't be a kernel thread */
         if (parent->pid <= 1 || !parent->mm)
                 goto unlock;
@@ -1531,20 +1530,15 @@ long keyctl_session_to_parent(void)
         if (!ret)
                 newwork = NULL;
 unlock:
+        task_unlock(parent);
         write_unlock_irq(&tasklist_lock);
         rcu_read_unlock();
-        if (oldwork) {
-                put_cred(oldwork->data);
-                kfree(oldwork);
-        }
-        if (newwork) {
-                put_cred(newwork->data);
-                kfree(newwork);
-        }
+        if (oldwork)
+                put_cred(container_of(oldwork, struct cred, rcu));
+        if (newwork)
+                put_cred(cred);
         return ret;
 
-error_newwork:
-        kfree(newwork);
 error_keyring:
         key_ref_put(keyring_r);
         return ret;
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 4ad54eea1ea4..54339cfd6734 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -834,12 +834,11 @@ error:
  * Replace a process's session keyring on behalf of one of its children when
  * the target  process is about to resume userspace execution.
  */
-void key_change_session_keyring(struct task_work *twork)
+void key_change_session_keyring(struct callback_head *twork)
 {
         const struct cred *old = current_cred();
-        struct cred *new = twork->data;
+        struct cred *new = container_of(twork, struct cred, rcu);
 
-        kfree(twork);
         if (unlikely(current->flags & PF_EXITING)) {
                 put_cred(new);
                 return;
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index ffd8900a38e8..9292a8971e66 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2157,8 +2157,7 @@ static inline void flush_unauthorized_files(const struct cred *cred,
                                                 get_file(devnull);
                                         } else {
                                                 devnull = dentry_open(
-                                                        dget(selinux_null),
-                                                        mntget(selinuxfs_mount),
+                                                        &selinux_null,
                                                         O_RDWR, cred);
                                                 if (IS_ERR(devnull)) {
                                                         devnull = NULL;
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index dde2005407aa..6d3885165d14 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -221,7 +221,7 @@ extern void selinux_status_update_policyload(int seqno);
 extern void selinux_complete_init(void);
 extern int selinux_disable(void);
 extern void exit_sel_fs(void);
-extern struct dentry *selinux_null;
+extern struct path selinux_null;
 extern struct vfsmount *selinuxfs_mount;
 extern void selnl_notify_setenforce(int val);
 extern void selnl_notify_policyload(u32 seqno);
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 3ad290251288..298e695d6822 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1297,7 +1297,7 @@ out:
 
 #define NULL_FILE_NAME "null"
 
-struct dentry *selinux_null;
+struct path selinux_null;
 
 static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf,
                                             size_t count, loff_t *ppos)
@@ -1838,7 +1838,7 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
 
         init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3));
         d_add(dentry, inode);
-        selinux_null = dentry;
+        selinux_null.dentry = dentry;
 
         dentry = sel_make_dir(sb->s_root, "avc", &sel_last_ino);
         if (IS_ERR(dentry)) {
@@ -1912,7 +1912,7 @@ static int __init init_sel_fs(void)
                 return err;
         }
 
-        selinuxfs_mount = kern_mount(&sel_fs_type);
+        selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type);
         if (IS_ERR(selinuxfs_mount)) {
                 printk(KERN_ERR "selinuxfs:  could not mount!\n");
                 err = PTR_ERR(selinuxfs_mount);