Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (107 commits)
  vfs: use ERR_CAST for err-ptr tossing in lookup_instantiate_filp
  isofs: Remove global fs lock
  jffs2: fix IN_DELETE_SELF on overwriting rename() killing a directory
  fix IN_DELETE_SELF on overwriting rename() on ramfs et.al.
  mm/truncate.c: fix build for CONFIG_BLOCK not enabled
  fs:update the NOTE of the file_operations structure
  Remove dead code in dget_parent()
  AFS: Fix silly characters in a comment
  switch d_add_ci() to d_splice_alias() in "found negative" case as well
  simplify gfs2_lookup()
  jfs_lookup(): don't bother with . or ..
  get rid of useless dget_parent() in btrfs rename() and link()
  get rid of useless dget_parent() in fs/btrfs/ioctl.c
  fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
  drivers: fix up various ->llseek() implementations
  fs: handle SEEK_HOLE/SEEK_DATA properly in all fs's that define their own llseek
  Ext4: handle SEEK_HOLE/SEEK_DATA generically
  Btrfs: implement our own ->llseek
  fs: add SEEK_HOLE and SEEK_DATA flags
  reiserfs: make reiserfs default to barrier=flush
  ...

Fix up trivial conflicts in fs/xfs/linux-2.6/xfs_super.c due to the new
shrinker callout for the inode cache, that clashed with the xfs code to
start the periodic workers later.

172 files changed, 1811 insertions, 1479 deletions

diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index 535ab6eccb1a..e98f56d3787d 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -96,12 +96,12 @@ static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type)
         return acl;
 }
 
-int v9fs_check_acl(struct inode *inode, int mask, unsigned int flags)
+int v9fs_check_acl(struct inode *inode, int mask)
 {
         struct posix_acl *acl;
         struct v9fs_session_info *v9ses;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         v9ses = v9fs_inode2v9ses(inode);
diff --git a/fs/9p/acl.h b/fs/9p/acl.h
index 7ef3ac9f6d95..59e18c2e8c7e 100644
--- a/fs/9p/acl.h
+++ b/fs/9p/acl.h
@@ -16,7 +16,7 @@
 
 #ifdef CONFIG_9P_FS_POSIX_ACL
 extern int v9fs_get_acl(struct inode *, struct p9_fid *);
-extern int v9fs_check_acl(struct inode *inode, int mask, unsigned int flags);
+extern int v9fs_check_acl(struct inode *inode, int mask);
 extern int v9fs_acl_chmod(struct dentry *);
 extern int v9fs_set_create_acl(struct dentry *,
                                struct posix_acl *, struct posix_acl *);
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index 4014160903a9..46ce357ca1ab 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -70,7 +70,8 @@ ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64);
 ssize_t v9fs_fid_readn(struct p9_fid *, char *, char __user *, u32, u64);
 void v9fs_blank_wstat(struct p9_wstat *wstat);
 int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *);
-int v9fs_file_fsync_dotl(struct file *filp, int datasync);
+int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end,
+                         int datasync);
 ssize_t v9fs_file_write_internal(struct inode *, struct p9_fid *,
                                  const char __user *, size_t, loff_t *, int);
 int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode);
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index ffed55817f0c..3c173fcc2c5a 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -519,32 +519,50 @@ out:
 }
 
 
-static int v9fs_file_fsync(struct file *filp, int datasync)
+static int v9fs_file_fsync(struct file *filp, loff_t start, loff_t end,
+                           int datasync)
 {
         struct p9_fid *fid;
+        struct inode *inode = filp->f_mapping->host;
         struct p9_wstat wstat;
         int retval;
 
+        retval = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (retval)
+                return retval;
+
+        mutex_lock(&inode->i_mutex);
         P9_DPRINTK(P9_DEBUG_VFS, "filp %p datasync %x\n", filp, datasync);
 
         fid = filp->private_data;
         v9fs_blank_wstat(&wstat);
 
         retval = p9_client_wstat(fid, &wstat);
+        mutex_unlock(&inode->i_mutex);
+
         return retval;
 }
 
-int v9fs_file_fsync_dotl(struct file *filp, int datasync)
+int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end,
+                         int datasync)
 {
         struct p9_fid *fid;
+        struct inode *inode = filp->f_mapping->host;
         int retval;
 
+        retval = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (retval)
+                return retval;
+
+        mutex_lock(&inode->i_mutex);
         P9_DPRINTK(P9_DEBUG_VFS, "v9fs_file_fsync_dotl: filp %p datasync %x\n",
                         filp, datasync);
 
         fid = filp->private_data;
 
         retval = p9_client_fsync(fid, datasync);
+        mutex_unlock(&inode->i_mutex);
+
         return retval;
 }
 
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 7f6c67703195..7f9976a866e9 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -633,8 +633,8 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
         fid = NULL;
         v9ses = v9fs_inode2v9ses(dir);
         perm = unixmode2p9mode(v9ses, mode);
-        if (nd && nd->flags & LOOKUP_OPEN)
-                flags = nd->intent.open.flags - 1;
+        if (nd)
+                flags = nd->intent.open.flags;
         else
                 flags = O_RDWR;
 
@@ -649,7 +649,7 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
 
         v9fs_invalidate_inode_attr(dir);
         /* if we are opening a file, assign the open fid to the file */
-        if (nd && nd->flags & LOOKUP_OPEN) {
+        if (nd) {
                 v9inode = V9FS_I(dentry->d_inode);
                 mutex_lock(&v9inode->v_mutex);
                 if (v9ses->cache && !v9inode->writeback_fid &&
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 691c78f58bef..32bbbe5aa689 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -173,8 +173,8 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode,
         struct posix_acl *pacl = NULL, *dacl = NULL;
 
         v9ses = v9fs_inode2v9ses(dir);
-        if (nd && nd->flags & LOOKUP_OPEN)
-                flags = nd->intent.open.flags - 1;
+        if (nd)
+                flags = nd->intent.open.flags;
         else {
                 /*
                  * create call without LOOKUP_OPEN is due
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 0e95f73a7023..c2b9c79eb64e 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -182,7 +182,7 @@ extern int			 affs_add_entry(struct inode *dir, struct inode *inode, struct dent
 
 void            affs_free_prealloc(struct inode *inode);
 extern void     affs_truncate(struct inode *);
-int             affs_file_fsync(struct file *, int);
+int             affs_file_fsync(struct file *, loff_t, loff_t, int);
 
 /* dir.c */
 
diff --git a/fs/affs/file.c b/fs/affs/file.c
index acf321b70fcd..2f4c935cb327 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -923,14 +923,20 @@ affs_truncate(struct inode *inode)
         affs_free_prealloc(inode);
 }
 
-int affs_file_fsync(struct file *filp, int datasync)
+int affs_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = filp->f_mapping->host;
         int ret, err;
 
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+
+        mutex_lock(&inode->i_mutex);
         ret = write_inode_now(inode, 0);
         err = sync_blockdev(inode->i_sb->s_bdev);
         if (!ret)
                 ret = err;
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
diff --git a/fs/afs/afs_vl.h b/fs/afs/afs_vl.h
index 8bbefe009ed4..800f607ffaf5 100644
--- a/fs/afs/afs_vl.h
+++ b/fs/afs/afs_vl.h
@@ -49,7 +49,7 @@ enum AFSVL_Errors {
         AFSVL_BADVOLOPER        = 363542,       /* Bad volume operation code */
         AFSVL_BADRELLOCKTYPE    = 363543,       /* Bad release lock type */
         AFSVL_RERELEASE         = 363544,       /* Status report: last release was aborted */
-        AFSVL_BADSERVERFLAG     = 363545,       /* Invalid replication site server °ag */
+        AFSVL_BADSERVERFLAG     = 363545,       /* Invalid replication site server flag */
         AFSVL_PERM              = 363546,       /* No permission access */
         AFSVL_NOMEM             = 363547,       /* malloc/realloc failed to alloc enough memory */
 };
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 5a9b6843bac1..d2b0888126d4 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -627,7 +627,7 @@ extern void afs_clear_permits(struct afs_vnode *);
 extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
 extern void afs_zap_permits(struct rcu_head *);
 extern struct key *afs_request_key(struct afs_cell *);
-extern int afs_permission(struct inode *, int, unsigned int);
+extern int afs_permission(struct inode *, int);
 
 /*
  * server.c
@@ -750,7 +750,7 @@ extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
 extern ssize_t afs_file_write(struct kiocb *, const struct iovec *,
                               unsigned long, loff_t);
 extern int afs_writeback_all(struct afs_vnode *);
-extern int afs_fsync(struct file *, int);
+extern int afs_fsync(struct file *, loff_t, loff_t, int);
 
 
 /*****************************************************************************/
diff --git a/fs/afs/security.c b/fs/afs/security.c
index f44b9d355377..8d010422dc89 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -285,14 +285,14 @@ static int afs_check_permit(struct afs_vnode *vnode, struct key *key,
  * - AFS ACLs are attached to directories only, and a file is controlled by its
  *   parent directory's ACL
  */
-int afs_permission(struct inode *inode, int mask, unsigned int flags)
+int afs_permission(struct inode *inode, int mask)
 {
         struct afs_vnode *vnode = AFS_FS_I(inode);
         afs_access_t uninitialized_var(access);
         struct key *key;
         int ret;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         _enter("{{%x:%u},%lx},%x,",
@@ -350,7 +350,7 @@ int afs_permission(struct inode *inode, int mask, unsigned int flags)
         }
 
         key_put(key);
-        ret = generic_permission(inode, mask, flags, NULL);
+        ret = generic_permission(inode, mask);
         _leave(" = %d", ret);
         return ret;
 
diff --git a/fs/afs/write.c b/fs/afs/write.c
index b806285ff853..9aa52d93c73c 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -681,9 +681,10 @@ int afs_writeback_all(struct afs_vnode *vnode)
  * - the return status from this call provides a reliable indication of
  *   whether any write errors occurred for this process.
  */
-int afs_fsync(struct file *file, int datasync)
+int afs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct dentry *dentry = file->f_path.dentry;
+        struct inode *inode = file->f_mapping->host;
         struct afs_writeback *wb, *xwb;
         struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
         int ret;
@@ -692,12 +693,19 @@ int afs_fsync(struct file *file, int datasync)
                vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name,
                datasync);
 
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+        mutex_lock(&inode->i_mutex);
+
         /* use a writeback record as a marker in the queue - when this reaches
          * the front of the queue, all the outstanding writes are either
          * completed or rejected */
         wb = kzalloc(sizeof(*wb), GFP_KERNEL);
-        if (!wb)
-                return -ENOMEM;
+        if (!wb) {
+                ret = -ENOMEM;
+                goto out;
+        }
         wb->vnode = vnode;
         wb->first = 0;
         wb->last = -1;
@@ -720,7 +728,7 @@ int afs_fsync(struct file *file, int datasync)
         if (ret < 0) {
                 afs_put_writeback(wb);
                 _leave(" = %d [wb]", ret);
-                return ret;
+                goto out;
         }
 
         /* wait for the preceding writes to actually complete */
@@ -729,6 +737,8 @@ int afs_fsync(struct file *file, int datasync)
                                        vnode->writebacks.next == &wb->link);
         afs_put_writeback(wb);
         _leave(" = %d", ret);
+out:
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
 
diff --git a/fs/attr.c b/fs/attr.c
index caf2aa521e2b..538e27959d3f 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -232,17 +232,11 @@ int notify_change(struct dentry * dentry, struct iattr * attr)
         if (error)
                 return error;
 
-        if (ia_valid & ATTR_SIZE)
-                down_write(&dentry->d_inode->i_alloc_sem);
-
         if (inode->i_op->setattr)
                 error = inode->i_op->setattr(dentry, attr);
         else
                 error = simple_setattr(dentry, attr);
 
-        if (ia_valid & ATTR_SIZE)
-                up_write(&dentry->d_inode->i_alloc_sem);
-
         if (!error)
                 fsnotify_change(dentry, ia_valid);
 
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index bfcb18feb1df..9205cf25f1c6 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -87,7 +87,8 @@ static int bad_file_release(struct inode *inode, struct file *filp)
         return -EIO;
 }
 
-static int bad_file_fsync(struct file *file, int datasync)
+static int bad_file_fsync(struct file *file, loff_t start, loff_t end,
+                          int datasync)
 {
         return -EIO;
 }
@@ -229,7 +230,7 @@ static int bad_inode_readlink(struct dentry *dentry, char __user *buffer,
         return -EIO;
 }
 
-static int bad_inode_permission(struct inode *inode, int mask, unsigned int flags)
+static int bad_inode_permission(struct inode *inode, int mask)
 {
         return -EIO;
 }
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 303983fabfd6..dd0fdfc56d38 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -668,8 +668,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
                          * mm->dumpable = 0 regardless of the interpreter's
                          * permissions.
                          */
-                        if (file_permission(interpreter, MAY_READ) < 0)
-                                bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
+                        would_dump(bprm, interpreter);
 
                         retval = kernel_read(interpreter, 0, bprm->buf,
                                              BINPRM_BUF_SIZE);
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 2bc5dc644b4c..30745f459faf 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -245,8 +245,7 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm,
                          * mm->dumpable = 0 regardless of the interpreter's
                          * permissions.
                          */
-                        if (file_permission(interpreter, MAY_READ) < 0)
-                                bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
+                        would_dump(bprm, interpreter);
 
                         retval = kernel_read(interpreter, 0, bprm->buf,
                                              BINPRM_BUF_SIZE);
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 1befe2ec8186..ba1a1ae4a18a 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -149,8 +149,7 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 
                 /* if the binary is not readable than enforce mm->dumpable=0
                    regardless of the interpreter's permissions */
-                if (file_permission(bprm->file, MAY_READ))
-                        bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
+                would_dump(bprm, bprm->file);
 
                 allow_write_access(bprm->file);
                 bprm->file = NULL;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 610e8e0b04b8..9fb0b15331d3 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -355,25 +355,30 @@ static loff_t block_llseek(struct file *file, loff_t offset, int origin)
         mutex_lock(&bd_inode->i_mutex);
         size = i_size_read(bd_inode);
 
+        retval = -EINVAL;
         switch (origin) {
-                case 2:
+                case SEEK_END:
                         offset += size;
                         break;
-                case 1:
+                case SEEK_CUR:
                         offset += file->f_pos;
+                case SEEK_SET:
+                        break;
+                default:
+                        goto out;
         }
-        retval = -EINVAL;
         if (offset >= 0 && offset <= size) {
                 if (offset != file->f_pos) {
                         file->f_pos = offset;
                 }
                 retval = offset;
         }
+out:
         mutex_unlock(&bd_inode->i_mutex);
         return retval;
 }
         
-int blkdev_fsync(struct file *filp, int datasync)
+int blkdev_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
 {
         struct inode *bd_inode = filp->f_mapping->host;
         struct block_device *bdev = I_BDEV(bd_inode);
@@ -384,14 +389,10 @@ int blkdev_fsync(struct file *filp, int datasync)
          * i_mutex and doing so causes performance issues with concurrent
          * O_SYNC writers to a block device.
          */
-        mutex_unlock(&bd_inode->i_mutex);
-
         error = blkdev_issue_flush(bdev, GFP_KERNEL, NULL);
         if (error == -EOPNOTSUPP)
                 error = 0;
 
-        mutex_lock(&bd_inode->i_mutex);
-
         return error;
 }
 EXPORT_SYMBOL(blkdev_fsync);
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index f66fc9959733..9f62ab2a7282 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -195,14 +195,13 @@ out:
         return ret;
 }
 
-int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags)
+int btrfs_check_acl(struct inode *inode, int mask)
 {
         int error = -EAGAIN;
 
-        if (flags & IPERM_FLAG_RCU) {
+        if (mask & MAY_NOT_BLOCK) {
                 if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
                         error = -ECHILD;
-
         } else {
                 struct posix_acl *acl;
                 acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS);
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 3b859a3e6a0e..82be74efbb26 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1219,7 +1219,7 @@ struct btrfs_root {
          * right now this just gets used so that a root has its own devid
          * for stat.  It may be used for more later
          */
-        struct super_block anon_super;
+        dev_t anon_dev;
 };
 
 struct btrfs_ioctl_defrag_range_args {
@@ -2510,6 +2510,9 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
                              struct list_head *list, int search_commit);
 /* inode.c */
+struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
+                                           size_t pg_offset, u64 start, u64 len,
+                                           int create);
 
 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
@@ -2602,7 +2605,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
                            struct inode *inode);
 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
-int btrfs_sync_file(struct file *file, int datasync);
+int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
                             int skip_pinned);
 extern const struct file_operations btrfs_file_operations;
@@ -2642,7 +2645,7 @@ do {								\
 
 /* acl.c */
 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
-int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
+int btrfs_check_acl(struct inode *inode, int mask);
 #else
 #define btrfs_check_acl NULL
 #endif
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 1ac8db5dc0a3..b231ae13b269 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1077,12 +1077,7 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
         init_completion(&root->kobj_unregister);
         root->defrag_running = 0;
         root->root_key.objectid = objectid;
-        root->anon_super.s_root = NULL;
-        root->anon_super.s_dev = 0;
-        INIT_LIST_HEAD(&root->anon_super.s_list);
-        INIT_LIST_HEAD(&root->anon_super.s_instances);
-        init_rwsem(&root->anon_super.s_umount);
-
+        root->anon_dev = 0;
         return 0;
 }
 
@@ -1311,7 +1306,7 @@ again:
         spin_lock_init(&root->cache_lock);
         init_waitqueue_head(&root->cache_wait);
 
-        ret = set_anon_super(&root->anon_super, NULL);
+        ret = get_anon_bdev(&root->anon_dev);
         if (ret)
                 goto fail;
 
@@ -2393,10 +2388,8 @@ static void free_fs_root(struct btrfs_root *root)
 {
         iput(root->cache_inode);
         WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree));
-        if (root->anon_super.s_dev) {
-                down_write(&root->anon_super.s_umount);
-                kill_anon_super(&root->anon_super);
-        }
+        if (root->anon_dev)
+                free_anon_bdev(root->anon_dev);
         free_extent_buffer(root->node);
         free_extent_buffer(root->commit_root);
         kfree(root->free_ino_ctl);
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index fa4ef18b66b1..59cbdb120ad0 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1452,7 +1452,7 @@ int btrfs_release_file(struct inode *inode, struct file *filp)
  * important optimization for directories because holding the mutex prevents
  * new operations on the dir while we write to disk.
  */
-int btrfs_sync_file(struct file *file, int datasync)
+int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct dentry *dentry = file->f_path.dentry;
         struct inode *inode = dentry->d_inode;
@@ -1462,9 +1462,13 @@ int btrfs_sync_file(struct file *file, int datasync)
 
         trace_btrfs_sync_file(file, datasync);
 
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+        mutex_lock(&inode->i_mutex);
+
         /* we wait first, since the writeback may change the inode */
         root->log_batch++;
-        /* the VFS called filemap_fdatawrite for us */
         btrfs_wait_ordered_range(inode, 0, (u64)-1);
         root->log_batch++;
 
@@ -1472,8 +1476,10 @@ int btrfs_sync_file(struct file *file, int datasync)
          * check the transaction that last modified this inode
          * and see if its already been committed
          */
-        if (!BTRFS_I(inode)->last_trans)
+        if (!BTRFS_I(inode)->last_trans) {
+                mutex_unlock(&inode->i_mutex);
                 goto out;
+        }
 
         /*
          * if the last transaction that changed this file was before
@@ -1484,6 +1490,7 @@ int btrfs_sync_file(struct file *file, int datasync)
         if (BTRFS_I(inode)->last_trans <=
             root->fs_info->last_trans_committed) {
                 BTRFS_I(inode)->last_trans = 0;
+                mutex_unlock(&inode->i_mutex);
                 goto out;
         }
 
@@ -1496,12 +1503,15 @@ int btrfs_sync_file(struct file *file, int datasync)
         trans = btrfs_start_transaction(root, 0);
         if (IS_ERR(trans)) {
                 ret = PTR_ERR(trans);
+                mutex_unlock(&inode->i_mutex);
                 goto out;
         }
 
         ret = btrfs_log_dentry_safe(trans, root, dentry);
-        if (ret < 0)
+        if (ret < 0) {
+                mutex_unlock(&inode->i_mutex);
                 goto out;
+        }
 
         /* we've logged all the items and now have a consistent
          * version of the file in the log.  It is possible that
@@ -1513,7 +1523,7 @@ int btrfs_sync_file(struct file *file, int datasync)
          * file again, but that will end up using the synchronization
          * inside btrfs_sync_log to keep things safe.
          */
-        mutex_unlock(&dentry->d_inode->i_mutex);
+        mutex_unlock(&inode->i_mutex);
 
         if (ret != BTRFS_NO_LOG_SYNC) {
                 if (ret > 0) {
@@ -1528,7 +1538,6 @@ int btrfs_sync_file(struct file *file, int datasync)
         } else {
                 ret = btrfs_end_transaction(trans, root);
         }
-        mutex_lock(&dentry->d_inode->i_mutex);
 out:
         return ret > 0 ? -EIO : ret;
 }
@@ -1664,8 +1673,154 @@ out:
         return ret;
 }
 
+static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
+{
+        struct btrfs_root *root = BTRFS_I(inode)->root;
+        struct extent_map *em;
+        struct extent_state *cached_state = NULL;
+        u64 lockstart = *offset;
+        u64 lockend = i_size_read(inode);
+        u64 start = *offset;
+        u64 orig_start = *offset;
+        u64 len = i_size_read(inode);
+        u64 last_end = 0;
+        int ret = 0;
+
+        lockend = max_t(u64, root->sectorsize, lockend);
+        if (lockend <= lockstart)
+                lockend = lockstart + root->sectorsize;
+
+        len = lockend - lockstart + 1;
+
+        len = max_t(u64, len, root->sectorsize);
+        if (inode->i_size == 0)
+                return -ENXIO;
+
+        lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend, 0,
+                         &cached_state, GFP_NOFS);
+
+        /*
+         * Delalloc is such a pain.  If we have a hole and we have pending
+         * delalloc for a portion of the hole we will get back a hole that
+         * exists for the entire range since it hasn't been actually written
+         * yet.  So to take care of this case we need to look for an extent just
+         * before the position we want in case there is outstanding delalloc
+         * going on here.
+         */
+        if (origin == SEEK_HOLE && start != 0) {
+                if (start <= root->sectorsize)
+                        em = btrfs_get_extent_fiemap(inode, NULL, 0, 0,
+                                                     root->sectorsize, 0);
+                else
+                        em = btrfs_get_extent_fiemap(inode, NULL, 0,
+                                                     start - root->sectorsize,
+                                                     root->sectorsize, 0);
+                if (IS_ERR(em)) {
+                        ret = -ENXIO;
+                        goto out;
+                }
+                last_end = em->start + em->len;
+                if (em->block_start == EXTENT_MAP_DELALLOC)
+                        last_end = min_t(u64, last_end, inode->i_size);
+                free_extent_map(em);
+        }
+
+        while (1) {
+                em = btrfs_get_extent_fiemap(inode, NULL, 0, start, len, 0);
+                if (IS_ERR(em)) {
+                        ret = -ENXIO;
+                        break;
+                }
+
+                if (em->block_start == EXTENT_MAP_HOLE) {
+                        if (test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
+                                if (last_end <= orig_start) {
+                                        free_extent_map(em);
+                                        ret = -ENXIO;
+                                        break;
+                                }
+                        }
+
+                        if (origin == SEEK_HOLE) {
+                                *offset = start;
+                                free_extent_map(em);
+                                break;
+                        }
+                } else {
+                        if (origin == SEEK_DATA) {
+                                if (em->block_start == EXTENT_MAP_DELALLOC) {
+                                        if (start >= inode->i_size) {
+                                                free_extent_map(em);
+                                                ret = -ENXIO;
+                                                break;
+                                        }
+                                }
+
+                                *offset = start;
+                                free_extent_map(em);
+                                break;
+                        }
+                }
+
+                start = em->start + em->len;
+                last_end = em->start + em->len;
+
+                if (em->block_start == EXTENT_MAP_DELALLOC)
+                        last_end = min_t(u64, last_end, inode->i_size);
+
+                if (test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
+                        free_extent_map(em);
+                        ret = -ENXIO;
+                        break;
+                }
+                free_extent_map(em);
+                cond_resched();
+        }
+        if (!ret)
+                *offset = min(*offset, inode->i_size);
+out:
+        unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend,
+                             &cached_state, GFP_NOFS);
+        return ret;
+}
+
+static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin)
+{
+        struct inode *inode = file->f_mapping->host;
+        int ret;
+
+        mutex_lock(&inode->i_mutex);
+        switch (origin) {
+        case SEEK_END:
+        case SEEK_CUR:
+                offset = generic_file_llseek_unlocked(file, offset, origin);
+                goto out;
+        case SEEK_DATA:
+        case SEEK_HOLE:
+                ret = find_desired_extent(inode, &offset, origin);
+                if (ret) {
+                        mutex_unlock(&inode->i_mutex);
+                        return ret;
+                }
+        }
+
+        if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
+                return -EINVAL;
+        if (offset > inode->i_sb->s_maxbytes)
+                return -EINVAL;
+
+        /* Special lock needed here? */
+        if (offset != file->f_pos) {
+                file->f_pos = offset;
+                file->f_version = 0;
+        }
+out:
+        mutex_unlock(&inode->i_mutex);
+        return offset;
+}
+
 const struct file_operations btrfs_file_operations = {
-        .llseek         = generic_file_llseek,
+        .llseek         = btrfs_file_llseek,
         .read           = do_sync_read,
         .write          = do_sync_write,
         .aio_read       = generic_file_aio_read,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 3601f0aebddf..2548a04a0230 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4079,13 +4079,7 @@ static int btrfs_dentry_delete(const struct dentry *dentry)
 static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
                                    struct nameidata *nd)
 {
-        struct inode *inode;
-
-        inode = btrfs_lookup_dentry(dir, dentry);
-        if (IS_ERR(inode))
-                return ERR_CAST(inode);
-
-        return d_splice_alias(inode, dentry);
+        return d_splice_alias(btrfs_lookup_dentry(dir, dentry), dentry);
 }
 
 unsigned char btrfs_filetype_table[] = {
@@ -4772,11 +4766,10 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
         if (err) {
                 drop_inode = 1;
         } else {
-                struct dentry *parent = dget_parent(dentry);
+                struct dentry *parent = dentry->d_parent;
                 err = btrfs_update_inode(trans, root, inode);
                 BUG_ON(err);
                 btrfs_log_new_name(trans, inode, NULL, parent);
-                dput(parent);
         }
 
         nr = trans->blocks_used;
@@ -6900,7 +6893,7 @@ static int btrfs_getattr(struct vfsmount *mnt,
 {
         struct inode *inode = dentry->d_inode;
         generic_fillattr(inode, stat);
-        stat->dev = BTRFS_I(inode)->root->anon_super.s_dev;
+        stat->dev = BTRFS_I(inode)->root->anon_dev;
         stat->blksize = PAGE_CACHE_SIZE;
         stat->blocks = (inode_get_bytes(inode) +
                         BTRFS_I(inode)->delalloc_bytes) >> 9;
@@ -7068,9 +7061,8 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
         BUG_ON(ret);
 
         if (old_ino != BTRFS_FIRST_FREE_OBJECTID) {
-                struct dentry *parent = dget_parent(new_dentry);
+                struct dentry *parent = new_dentry->d_parent;
                 btrfs_log_new_name(trans, old_inode, old_dir, parent);
-                dput(parent);
                 btrfs_end_log_trans(root);
         }
 out_fail:
@@ -7331,7 +7323,7 @@ static int btrfs_set_page_dirty(struct page *page)
         return __set_page_dirty_nobuffers(page);
 }
 
-static int btrfs_permission(struct inode *inode, int mask, unsigned int flags)
+static int btrfs_permission(struct inode *inode, int mask)
 {
         struct btrfs_root *root = BTRFS_I(inode)->root;
 
@@ -7339,7 +7331,7 @@ static int btrfs_permission(struct inode *inode, int mask, unsigned int flags)
                 return -EROFS;
         if ((BTRFS_I(inode)->flags & BTRFS_INODE_READONLY) && (mask & MAY_WRITE))
                 return -EACCES;
-        return generic_permission(inode, mask, flags, btrfs_check_acl);
+        return generic_permission(inode, mask);
 }
 
 static const struct inode_operations btrfs_dir_inode_operations = {
@@ -7359,10 +7351,12 @@ static const struct inode_operations btrfs_dir_inode_operations = {
         .listxattr      = btrfs_listxattr,
         .removexattr    = btrfs_removexattr,
         .permission     = btrfs_permission,
+        .check_acl      = btrfs_check_acl,
 };
 static const struct inode_operations btrfs_dir_ro_inode_operations = {
         .lookup         = btrfs_lookup,
         .permission     = btrfs_permission,
+        .check_acl      = btrfs_check_acl,
 };
 
 static const struct file_operations btrfs_dir_file_operations = {
@@ -7431,6 +7425,7 @@ static const struct inode_operations btrfs_file_inode_operations = {
         .removexattr    = btrfs_removexattr,
         .permission     = btrfs_permission,
         .fiemap         = btrfs_fiemap,
+        .check_acl      = btrfs_check_acl,
 };
 static const struct inode_operations btrfs_special_inode_operations = {
         .getattr        = btrfs_getattr,
@@ -7440,6 +7435,7 @@ static const struct inode_operations btrfs_special_inode_operations = {
         .getxattr       = btrfs_getxattr,
         .listxattr      = btrfs_listxattr,
         .removexattr    = btrfs_removexattr,
+        .check_acl      = btrfs_check_acl,
 };
 static const struct inode_operations btrfs_symlink_inode_operations = {
         .readlink       = generic_readlink,
@@ -7451,6 +7447,7 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
         .getxattr       = btrfs_getxattr,
         .listxattr      = btrfs_listxattr,
         .removexattr    = btrfs_removexattr,
+        .check_acl      = btrfs_check_acl,
 };
 
 const struct dentry_operations btrfs_dentry_operations = {
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a3c4751e07db..622543309eb2 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -323,7 +323,7 @@ static noinline int create_subvol(struct btrfs_root *root,
         struct btrfs_inode_item *inode_item;
         struct extent_buffer *leaf;
         struct btrfs_root *new_root;
-        struct dentry *parent = dget_parent(dentry);
+        struct dentry *parent = dentry->d_parent;
         struct inode *dir;
         int ret;
         int err;
@@ -332,10 +332,8 @@ static noinline int create_subvol(struct btrfs_root *root,
         u64 index = 0;
 
         ret = btrfs_find_free_objectid(root->fs_info->tree_root, &objectid);
-        if (ret) {
-                dput(parent);
+        if (ret)
                 return ret;
-        }
 
         dir = parent->d_inode;
 
@@ -346,10 +344,8 @@ static noinline int create_subvol(struct btrfs_root *root,
          * 2 - dir items
          */
         trans = btrfs_start_transaction(root, 6);
-        if (IS_ERR(trans)) {
-                dput(parent);
+        if (IS_ERR(trans))
                 return PTR_ERR(trans);
-        }
 
         leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
                                       0, objectid, NULL, 0, 0, 0);
@@ -439,7 +435,6 @@ static noinline int create_subvol(struct btrfs_root *root,
 
         d_instantiate(dentry, btrfs_lookup_dentry(dir, dentry));
 fail:
-        dput(parent);
         if (async_transid) {
                 *async_transid = trans->transid;
                 err = btrfs_commit_transaction_async(trans, root, 1);
@@ -456,7 +451,6 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
                            bool readonly)
 {
         struct inode *inode;
-        struct dentry *parent;
         struct btrfs_pending_snapshot *pending_snapshot;
         struct btrfs_trans_handle *trans;
         int ret;
@@ -504,9 +498,7 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
         if (ret)
                 goto fail;
 
-        parent = dget_parent(dentry);
-        inode = btrfs_lookup_dentry(parent->d_inode, dentry);
-        dput(parent);
+        inode = btrfs_lookup_dentry(dentry->d_parent->d_inode, dentry);
         if (IS_ERR(inode)) {
                 ret = PTR_ERR(inode);
                 goto fail;
diff --git a/fs/cachefiles/bind.c b/fs/cachefiles/bind.c
index a2603e7c0bb5..622f4696e484 100644
--- a/fs/cachefiles/bind.c
+++ b/fs/cachefiles/bind.c
@@ -129,8 +129,6 @@ static int cachefiles_daemon_add_cache(struct cachefiles_cache *cache)
             !root->d_inode->i_op->mkdir ||
             !root->d_inode->i_op->setxattr ||
             !root->d_inode->i_op->getxattr ||
-            !root->d_sb ||
-            !root->d_sb->s_op ||
             !root->d_sb->s_op->statfs ||
             !root->d_sb->s_op->sync_fs)
                 goto error_unsupported;
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index f605753c8fe9..8d74ad7ba556 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1811,7 +1811,7 @@ out:
         spin_unlock(&ci->i_unsafe_lock);
 }
 
-int ceph_fsync(struct file *file, int datasync)
+int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         struct ceph_inode_info *ci = ceph_inode(inode);
@@ -1822,9 +1822,10 @@ int ceph_fsync(struct file *file, int datasync)
         dout("fsync %p%s\n", inode, datasync ? " datasync" : "");
         sync_write_wait(inode);
 
-        ret = filemap_write_and_wait(inode->i_mapping);
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
         if (ret < 0)
                 return ret;
+        mutex_lock(&inode->i_mutex);
 
         dirty = try_flush_caps(inode, NULL, &flush_tid);
         dout("fsync dirty caps are %s\n", ceph_cap_string(dirty));
@@ -1841,6 +1842,7 @@ int ceph_fsync(struct file *file, int datasync)
         }
 
         dout("fsync %p%s done\n", inode, datasync ? " datasync" : "");
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
 
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index ef8f08c343e8..1065ac779840 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -252,7 +252,7 @@ static int ceph_readdir(struct file *filp, void *dirent, filldir_t filldir)
                 off = 1;
         }
         if (filp->f_pos == 1) {
-                ino_t ino = filp->f_dentry->d_parent->d_inode->i_ino;
+                ino_t ino = parent_ino(filp->f_dentry);
                 dout("readdir off 1 -> '..'\n");
                 if (filldir(dirent, "..", 2, ceph_make_fpos(0, 1),
                             ceph_translate_ino(inode->i_sb, ino),
@@ -446,14 +446,19 @@ static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int origin)
         loff_t retval;
 
         mutex_lock(&inode->i_mutex);
+        retval = -EINVAL;
         switch (origin) {
         case SEEK_END:
                 offset += inode->i_size + 2;   /* FIXME */
                 break;
         case SEEK_CUR:
                 offset += file->f_pos;
+        case SEEK_SET:
+                break;
+        default:
+                goto out;
         }
-        retval = -EINVAL;
+
         if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) {
                 if (offset != file->f_pos) {
                         file->f_pos = offset;
@@ -477,6 +482,7 @@ static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int origin)
                 if (offset > old_offset)
                         fi->dir_release_count--;
         }
+out:
         mutex_unlock(&inode->i_mutex);
         return retval;
 }
@@ -566,7 +572,6 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
         /* open (but not create!) intent? */
         if (nd &&
             (nd->flags & LOOKUP_OPEN) &&
-            (nd->flags & LOOKUP_CONTINUE) == 0 && /* only open last component */
             !(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);
@@ -1113,7 +1118,8 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
  * an fsync() on a dir will wait for any uncommitted directory
  * operations to commit.
  */
-static int ceph_dir_fsync(struct file *file, int datasync)
+static int ceph_dir_fsync(struct file *file, loff_t start, loff_t end,
+                          int datasync)
 {
         struct inode *inode = file->f_path.dentry->d_inode;
         struct ceph_inode_info *ci = ceph_inode(inode);
@@ -1123,6 +1129,11 @@ static int ceph_dir_fsync(struct file *file, int datasync)
         int ret = 0;
 
         dout("dir_fsync %p\n", inode);
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+        mutex_lock(&inode->i_mutex);
+
         spin_lock(&ci->i_unsafe_lock);
         if (list_empty(head))
                 goto out;
@@ -1156,6 +1167,8 @@ static int ceph_dir_fsync(struct file *file, int datasync)
         } while (req->r_tid < last_tid);
 out:
         spin_unlock(&ci->i_unsafe_lock);
+        mutex_unlock(&inode->i_mutex);
+
         return ret;
 }
 
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 4698a5c553dc..0d0eae05598f 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -226,7 +226,7 @@ struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry,
         struct inode *parent_inode = get_dentry_parent_inode(file->f_dentry);
         struct ceph_mds_request *req;
         int err;
-        int flags = nd->intent.open.flags - 1;  /* silly vfs! */
+        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);
@@ -768,13 +768,16 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int origin)
 
         mutex_lock(&inode->i_mutex);
         __ceph_do_pending_vmtruncate(inode);
-        switch (origin) {
-        case SEEK_END:
+        if (origin != SEEK_CUR || origin != SEEK_SET) {
                 ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE);
                 if (ret < 0) {
                         offset = ret;
                         goto out;
                 }
+        }
+
+        switch (origin) {
+        case SEEK_END:
                 offset += inode->i_size;
                 break;
         case SEEK_CUR:
@@ -790,6 +793,19 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int origin)
                 }
                 offset += file->f_pos;
                 break;
+        case SEEK_DATA:
+                if (offset >= inode->i_size) {
+                        ret = -ENXIO;
+                        goto out;
+                }
+                break;
+        case SEEK_HOLE:
+                if (offset >= inode->i_size) {
+                        ret = -ENXIO;
+                        goto out;
+                }
+                offset = inode->i_size;
+                break;
         }
 
         if (offset < 0 || offset > inode->i_sb->s_maxbytes) {
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index d8858e96ab18..dfb2831d8d85 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1795,17 +1795,17 @@ int ceph_do_getattr(struct inode *inode, int mask)
  * Check inode permissions.  We verify we have a valid value for
  * the AUTH cap, then call the generic handler.
  */
-int ceph_permission(struct inode *inode, int mask, unsigned int flags)
+int ceph_permission(struct inode *inode, int mask)
 {
         int err;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED);
 
         if (!err)
-                err = generic_permission(inode, mask, flags, NULL);
+                err = generic_permission(inode, mask);
         return err;
 }
 
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index f5cabefa98dc..30446b144e3d 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -692,7 +692,7 @@ extern void ceph_queue_invalidate(struct inode *inode);
 extern void ceph_queue_writeback(struct inode *inode);
 
 extern int ceph_do_getattr(struct inode *inode, int mask);
-extern int ceph_permission(struct inode *inode, int mask, unsigned int flags);
+extern int ceph_permission(struct inode *inode, int mask);
 extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
 extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
                         struct kstat *stat);
@@ -728,7 +728,8 @@ extern void ceph_put_cap(struct ceph_mds_client *mdsc,
 
 extern void ceph_queue_caps_release(struct inode *inode);
 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
-extern int ceph_fsync(struct file *file, int datasync);
+extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
+                      int datasync);
 extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
                                     struct ceph_mds_session *session);
 extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index bc4b12ca537b..865517470967 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -224,7 +224,7 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
         return 0;
 }
 
-static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
+static int cifs_permission(struct inode *inode, int mask)
 {
         struct cifs_sb_info *cifs_sb;
 
@@ -239,7 +239,7 @@ static int cifs_permission(struct inode *inode, int mask, unsigned int flags)
                 on the client (above and beyond ACL on servers) for
                 servers which do not support setting and viewing mode bits,
                 so allowing client to check permissions is useful */
-                return generic_permission(inode, mask, flags, NULL);
+                return generic_permission(inode, mask);
 }
 
 static struct kmem_cache *cifs_inode_cachep;
@@ -704,8 +704,11 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 
 static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
 {
-        /* origin == SEEK_END => we must revalidate the cached file length */
-        if (origin == SEEK_END) {
+        /*
+         * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
+         * the cached file length
+         */
+        if (origin != SEEK_SET || origin != SEEK_CUR) {
                 int rc;
                 struct inode *inode = file->f_path.dentry->d_inode;
 
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 036ca83e5f46..fbd050c8d52a 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -91,8 +91,8 @@ extern ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov,
 extern ssize_t cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov,
                                   unsigned long nr_segs, loff_t pos);
 extern int cifs_lock(struct file *, int, struct file_lock *);
-extern int cifs_fsync(struct file *, int);
-extern int cifs_strict_fsync(struct file *, int);
+extern int cifs_fsync(struct file *, loff_t, loff_t, int);
+extern int cifs_strict_fsync(struct file *, loff_t, loff_t, int);
 extern int cifs_flush(struct file *, fl_owner_t id);
 extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
 extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index ccc1afa0bf3b..e66297bad412 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -320,9 +320,10 @@ requeue_echo:
 }
 
 static int
-cifs_demultiplex_thread(struct TCP_Server_Info *server)
+cifs_demultiplex_thread(void *p)
 {
         int length;
+        struct TCP_Server_Info *server = p;
         unsigned int pdu_length, total_read;
         struct smb_hdr *smb_buffer = NULL;
         struct smb_hdr *bigbuf = NULL;
@@ -1791,7 +1792,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
          * this will succeed. No need for try_module_get().
          */
         __module_get(THIS_MODULE);
-        tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
+        tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
                                   tcp_ses, "cifsd");
         if (IS_ERR(tcp_ses->tsk)) {
                 rc = PTR_ERR(tcp_ses->tsk);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index fa8c21d913bc..14d602f178c2 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -179,7 +179,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
         if (oplockEnabled)
                 oplock = REQ_OPLOCK;
 
-        if (nd && (nd->flags & LOOKUP_OPEN))
+        if (nd)
                 oflags = nd->intent.open.file->f_flags;
         else
                 oflags = O_RDONLY | O_CREAT;
@@ -214,7 +214,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                    which should be rare for path not covered on files) */
         }
 
-        if (nd && (nd->flags & LOOKUP_OPEN)) {
+        if (nd) {
                 /* if the file is going to stay open, then we
                    need to set the desired access properly */
                 desiredAccess = 0;
@@ -328,7 +328,7 @@ cifs_create_set_dentry:
         else
                 cFYI(1, "Create worked, get_inode_info failed rc = %d", rc);
 
-        if (newinode && nd && (nd->flags & LOOKUP_OPEN)) {
+        if (newinode && nd) {
                 struct cifsFileInfo *pfile_info;
                 struct file *filp;
 
@@ -568,7 +568,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
          * reduction in network traffic in the other paths.
          */
         if (pTcon->unix_ext) {
-                if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) &&
+                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,
@@ -663,10 +663,8 @@ 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_CONTINUE | LOOKUP_PARENT))) {
-                if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
-                        return 0;
-        }
+        if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+                return 0;
 
         if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled)
                 return 0;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index a9b4a24f2a16..378acdafa356 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1401,7 +1401,8 @@ static int cifs_write_end(struct file *file, struct address_space *mapping,
         return rc;
 }
 
-int cifs_strict_fsync(struct file *file, int datasync)
+int cifs_strict_fsync(struct file *file, loff_t start, loff_t end,
+                      int datasync)
 {
         int xid;
         int rc = 0;
@@ -1410,6 +1411,11 @@ int cifs_strict_fsync(struct file *file, int datasync)
         struct inode *inode = file->f_path.dentry->d_inode;
         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 
+        rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (rc)
+                return rc;
+        mutex_lock(&inode->i_mutex);
+
         xid = GetXid();
 
         cFYI(1, "Sync file - name: %s datasync: 0x%x",
@@ -1428,16 +1434,23 @@ int cifs_strict_fsync(struct file *file, int datasync)
                 rc = CIFSSMBFlush(xid, tcon, smbfile->netfid);
 
         FreeXid(xid);
+        mutex_unlock(&inode->i_mutex);
         return rc;
 }
 
-int cifs_fsync(struct file *file, int datasync)
+int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         int xid;
         int rc = 0;
         struct cifs_tcon *tcon;
         struct cifsFileInfo *smbfile = file->private_data;
         struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
+        struct inode *inode = file->f_mapping->host;
+
+        rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (rc)
+                return rc;
+        mutex_lock(&inode->i_mutex);
 
         xid = GetXid();
 
@@ -1449,6 +1462,7 @@ int cifs_fsync(struct file *file, int datasync)
                 rc = CIFSSMBFlush(xid, tcon, smbfile->netfid);
 
         FreeXid(xid);
+        mutex_unlock(&inode->i_mutex);
         return rc;
 }
 
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 6751e745bbc6..965a3af186a1 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -796,7 +796,7 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
                 file->f_pos++;
         case 1:
                 if (filldir(direntry, "..", 2, file->f_pos,
-                     file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
+                     parent_ino(file->f_path.dentry), DT_DIR) < 0) {
                         cERROR(1, "Filldir for parent dir failed");
                         rc = -ENOMEM;
                         break;
diff --git a/fs/coda/coda_int.h b/fs/coda/coda_int.h
index 6b443ff43a19..b7143cf783ac 100644
--- a/fs/coda/coda_int.h
+++ b/fs/coda/coda_int.h
@@ -11,7 +11,7 @@ extern int coda_fake_statfs;
 
 void coda_destroy_inodecache(void);
 int coda_init_inodecache(void);
-int coda_fsync(struct file *coda_file, int datasync);
+int coda_fsync(struct file *coda_file, loff_t start, loff_t end, int datasync);
 void coda_sysctl_init(void);
 void coda_sysctl_clean(void);
 
diff --git a/fs/coda/coda_linux.h b/fs/coda/coda_linux.h
index 9b0c5323890b..44e17e9c21ae 100644
--- a/fs/coda/coda_linux.h
+++ b/fs/coda/coda_linux.h
@@ -39,7 +39,7 @@ extern const struct file_operations coda_ioctl_operations;
 /* operations shared over more than one file */
 int coda_open(struct inode *i, struct file *f);
 int coda_release(struct inode *i, struct file *f);
-int coda_permission(struct inode *inode, int mask, unsigned int flags);
+int coda_permission(struct inode *inode, int mask);
 int coda_revalidate_inode(struct dentry *);
 int coda_getattr(struct vfsmount *, struct dentry *, struct kstat *);
 int coda_setattr(struct dentry *, struct iattr *);
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 2b8dae4d121e..0239433f50cb 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -132,11 +132,11 @@ exit:
 }
 
 
-int coda_permission(struct inode *inode, int mask, unsigned int flags)
+int coda_permission(struct inode *inode, int mask)
 {
         int error;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
@@ -449,8 +449,7 @@ static int coda_venus_readdir(struct file *coda_file, void *buf,
         struct file *host_file;
         struct dentry *de;
         struct venus_dirent *vdir;
-        unsigned long vdir_size =
-            (unsigned long)(&((struct venus_dirent *)0)->d_name);
+        unsigned long vdir_size = offsetof(struct venus_dirent, d_name);
         unsigned int type;
         struct qstr name;
         ino_t ino;
@@ -474,7 +473,7 @@ static int coda_venus_readdir(struct file *coda_file, void *buf,
                 coda_file->f_pos++;
         }
         if (coda_file->f_pos == 1) {
-                ret = filldir(buf, "..", 2, 1, de->d_parent->d_inode->i_ino, DT_DIR);
+                ret = filldir(buf, "..", 2, 1, parent_ino(de), DT_DIR);
                 if (ret < 0)
                         goto out;
                 result++;
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 0433057be330..8edd404e6419 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -199,7 +199,7 @@ int coda_release(struct inode *coda_inode, struct file *coda_file)
         return 0;
 }
 
-int coda_fsync(struct file *coda_file, int datasync)
+int coda_fsync(struct file *coda_file, loff_t start, loff_t end, int datasync)
 {
         struct file *host_file;
         struct inode *coda_inode = coda_file->f_path.dentry->d_inode;
@@ -210,6 +210,11 @@ int coda_fsync(struct file *coda_file, int datasync)
               S_ISLNK(coda_inode->i_mode)))
                 return -EINVAL;
 
+        err = filemap_write_and_wait_range(coda_inode->i_mapping, start, end);
+        if (err)
+                return err;
+        mutex_lock(&coda_inode->i_mutex);
+
         cfi = CODA_FTOC(coda_file);
         BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
         host_file = cfi->cfi_container;
@@ -217,6 +222,7 @@ int coda_fsync(struct file *coda_file, int datasync)
         err = vfs_fsync(host_file, datasync);
         if (!err && !datasync)
                 err = venus_fsync(coda_inode->i_sb, coda_i2f(coda_inode));
+        mutex_unlock(&coda_inode->i_mutex);
 
         return err;
 }
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
index cb140ef293e4..ee0981f1375b 100644
--- a/fs/coda/pioctl.c
+++ b/fs/coda/pioctl.c
@@ -24,7 +24,7 @@
 #include "coda_linux.h"
 
 /* pioctl ops */
-static int coda_ioctl_permission(struct inode *inode, int mask, unsigned int flags);
+static int coda_ioctl_permission(struct inode *inode, int mask);
 static long coda_pioctl(struct file *filp, unsigned int cmd,
                         unsigned long user_data);
 
@@ -41,7 +41,7 @@ const struct file_operations coda_ioctl_operations = {
 };
 
 /* the coda pioctl inode ops */
-static int coda_ioctl_permission(struct inode *inode, int mask, unsigned int flags)
+static int coda_ioctl_permission(struct inode *inode, int mask)
 {
         return (mask & MAY_EXEC) ? -EACCES : 0;
 }
diff --git a/fs/dcache.c b/fs/dcache.c
index fbdcbca40725..be18598c7fd7 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -344,6 +344,24 @@ void d_drop(struct dentry *dentry)
 EXPORT_SYMBOL(d_drop);
 
 /*
+ * d_clear_need_lookup - drop a dentry from cache and clear the need lookup flag
+ * @dentry: dentry to drop
+ *
+ * This is called when we do a lookup on a placeholder dentry that needed to be
+ * looked up.  The dentry should have been hashed in order for it to be found by
+ * the lookup code, but now needs to be unhashed while we do the actual lookup
+ * and clear the DCACHE_NEED_LOOKUP flag.
+ */
+void d_clear_need_lookup(struct dentry *dentry)
+{
+        spin_lock(&dentry->d_lock);
+        __d_drop(dentry);
+        dentry->d_flags &= ~DCACHE_NEED_LOOKUP;
+        spin_unlock(&dentry->d_lock);
+}
+EXPORT_SYMBOL(d_clear_need_lookup);
+
+/*
  * Finish off a dentry we've decided to kill.
  * dentry->d_lock must be held, returns with it unlocked.
  * If ref is non-zero, then decrement the refcount too.
@@ -432,8 +450,13 @@ repeat:
         if (d_unhashed(dentry))
                 goto kill_it;
 
-        /* Otherwise leave it cached and ensure it's on the LRU */
-        dentry->d_flags |= DCACHE_REFERENCED;
+        /*
+         * If this dentry needs lookup, don't set the referenced flag so that it
+         * is more likely to be cleaned up by the dcache shrinker in case of
+         * memory pressure.
+         */
+        if (!d_need_lookup(dentry))
+                dentry->d_flags |= DCACHE_REFERENCED;
         dentry_lru_add(dentry);
 
         dentry->d_count--;
@@ -526,10 +549,6 @@ repeat:
          */
         rcu_read_lock();
         ret = dentry->d_parent;
-        if (!ret) {
-                rcu_read_unlock();
-                goto out;
-        }
         spin_lock(&ret->d_lock);
         if (unlikely(ret != dentry->d_parent)) {
                 spin_unlock(&ret->d_lock);
@@ -540,7 +559,6 @@ repeat:
         BUG_ON(!ret->d_count);
         ret->d_count++;
         spin_unlock(&ret->d_lock);
-out:
         return ret;
 }
 EXPORT_SYMBOL(dget_parent);
@@ -720,13 +738,11 @@ static void shrink_dentry_list(struct list_head *list)
  *
  * If flags contains DCACHE_REFERENCED reference dentries will not be pruned.
  */
-static void __shrink_dcache_sb(struct super_block *sb, int *count, int flags)
+static void __shrink_dcache_sb(struct super_block *sb, int count, int flags)
 {
-        /* called from prune_dcache() and shrink_dcache_parent() */
         struct dentry *dentry;
         LIST_HEAD(referenced);
         LIST_HEAD(tmp);
-        int cnt = *count;
 
 relock:
         spin_lock(&dcache_lru_lock);
@@ -754,7 +770,7 @@ relock:
                 } else {
                         list_move_tail(&dentry->d_lru, &tmp);
                         spin_unlock(&dentry->d_lock);
-                        if (!--cnt)
+                        if (!--count)
                                 break;
                 }
                 cond_resched_lock(&dcache_lru_lock);
@@ -764,83 +780,22 @@ relock:
         spin_unlock(&dcache_lru_lock);
 
         shrink_dentry_list(&tmp);
-
-        *count = cnt;
 }
 
 /**
- * prune_dcache - shrink the dcache
- * @count: number of entries to try to free
+ * prune_dcache_sb - shrink the dcache
+ * @nr_to_scan: number of entries to try to free
  *
- * Shrink the dcache. This is done when we need more memory, or simply when we
- * need to unmount something (at which point we need to unuse all dentries).
+ * Attempt to shrink the superblock dcache LRU by @nr_to_scan entries. This is
+ * done when we need more memory an called from the superblock shrinker
+ * function.
  *
- * This function may fail to free any resources if all the dentries are in use.
+ * This function may fail to free any resources if all the dentries are in
+ * use.
  */
-static void prune_dcache(int count)
+void prune_dcache_sb(struct super_block *sb, int nr_to_scan)
 {
-        struct super_block *sb, *p = NULL;
-        int w_count;
-        int unused = dentry_stat.nr_unused;
-        int prune_ratio;
-        int pruned;
-
-        if (unused == 0 || count == 0)
-                return;
-        if (count >= unused)
-                prune_ratio = 1;
-        else
-                prune_ratio = unused / count;
-        spin_lock(&sb_lock);
-        list_for_each_entry(sb, &super_blocks, s_list) {
-                if (list_empty(&sb->s_instances))
-                        continue;
-                if (sb->s_nr_dentry_unused == 0)
-                        continue;
-                sb->s_count++;
-                /* Now, we reclaim unused dentrins with fairness.
-                 * We reclaim them same percentage from each superblock.
-                 * We calculate number of dentries to scan on this sb
-                 * as follows, but the implementation is arranged to avoid
-                 * overflows:
-                 * number of dentries to scan on this sb =
-                 * count * (number of dentries on this sb /
-                 * number of dentries in the machine)
-                 */
-                spin_unlock(&sb_lock);
-                if (prune_ratio != 1)
-                        w_count = (sb->s_nr_dentry_unused / prune_ratio) + 1;
-                else
-                        w_count = sb->s_nr_dentry_unused;
-                pruned = w_count;
-                /*
-                 * We need to be sure this filesystem isn't being unmounted,
-                 * otherwise we could race with generic_shutdown_super(), and
-                 * end up holding a reference to an inode while the filesystem
-                 * is unmounted.  So we try to get s_umount, and make sure
-                 * s_root isn't NULL.
-                 */
-                if (down_read_trylock(&sb->s_umount)) {
-                        if ((sb->s_root != NULL) &&
-                            (!list_empty(&sb->s_dentry_lru))) {
-                                __shrink_dcache_sb(sb, &w_count,
-                                                DCACHE_REFERENCED);
-                                pruned -= w_count;
-                        }
-                        up_read(&sb->s_umount);
-                }
-                spin_lock(&sb_lock);
-                if (p)
-                        __put_super(p);
-                count -= pruned;
-                p = sb;
-                /* more work left to do? */
-                if (count <= 0)
-                        break;
-        }
-        if (p)
-                __put_super(p);
-        spin_unlock(&sb_lock);
+        __shrink_dcache_sb(sb, nr_to_scan, DCACHE_REFERENCED);
 }
 
 /**
@@ -1215,45 +1170,13 @@ void shrink_dcache_parent(struct dentry * parent)
         int found;
 
         while ((found = select_parent(parent)) != 0)
-                __shrink_dcache_sb(sb, &found, 0);
+                __shrink_dcache_sb(sb, found, 0);
 }
 EXPORT_SYMBOL(shrink_dcache_parent);
 
-/*
- * Scan `sc->nr_slab_to_reclaim' dentries and return the number which remain.
- *
- * We need to avoid reentering the filesystem if the caller is performing a
- * GFP_NOFS allocation attempt.  One example deadlock is:
- *
- * ext2_new_block->getblk->GFP->shrink_dcache_memory->prune_dcache->
- * prune_one_dentry->dput->dentry_iput->iput->inode->i_sb->s_op->put_inode->
- * ext2_discard_prealloc->ext2_free_blocks->lock_super->DEADLOCK.
- *
- * In this case we return -1 to tell the caller that we baled.
- */
-static int shrink_dcache_memory(struct shrinker *shrink,
-                                struct shrink_control *sc)
-{
-        int nr = sc->nr_to_scan;
-        gfp_t gfp_mask = sc->gfp_mask;
-
-        if (nr) {
-                if (!(gfp_mask & __GFP_FS))
-                        return -1;
-                prune_dcache(nr);
-        }
-
-        return (dentry_stat.nr_unused / 100) * sysctl_vfs_cache_pressure;
-}
-
-static struct shrinker dcache_shrinker = {
-        .shrink = shrink_dcache_memory,
-        .seeks = DEFAULT_SEEKS,
-};
-
 /**
- * d_alloc      -       allocate a dcache entry
- * @parent: parent of entry to allocate
+ * __d_alloc    -       allocate a dcache entry
+ * @sb: filesystem it will belong to
  * @name: qstr of the name
  *
  * Allocates a dentry. It returns %NULL if there is insufficient memory
@@ -1261,7 +1184,7 @@ static struct shrinker dcache_shrinker = {
  * copied and the copy passed in may be reused after this call.
  */
  
-struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
+struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
 {
         struct dentry *dentry;
         char *dname;
@@ -1291,8 +1214,8 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
         spin_lock_init(&dentry->d_lock);
         seqcount_init(&dentry->d_seq);
         dentry->d_inode = NULL;
-        dentry->d_parent = NULL;
-        dentry->d_sb = NULL;
+        dentry->d_parent = dentry;
+        dentry->d_sb = sb;
         dentry->d_op = NULL;
         dentry->d_fsdata = NULL;
         INIT_HLIST_BL_NODE(&dentry->d_hash);
@@ -1300,36 +1223,47 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
         INIT_LIST_HEAD(&dentry->d_subdirs);
         INIT_LIST_HEAD(&dentry->d_alias);
         INIT_LIST_HEAD(&dentry->d_u.d_child);
-
-        if (parent) {
-                spin_lock(&parent->d_lock);
-                /*
-                 * don't need child lock because it is not subject
-                 * to concurrency here
-                 */
-                __dget_dlock(parent);
-                dentry->d_parent = parent;
-                dentry->d_sb = parent->d_sb;
-                d_set_d_op(dentry, dentry->d_sb->s_d_op);
-                list_add(&dentry->d_u.d_child, &parent->d_subdirs);
-                spin_unlock(&parent->d_lock);
-        }
+        d_set_d_op(dentry, dentry->d_sb->s_d_op);
 
         this_cpu_inc(nr_dentry);
 
         return dentry;
 }
+
+/**
+ * d_alloc      -       allocate a dcache entry
+ * @parent: parent of entry to allocate
+ * @name: qstr of the name
+ *
+ * Allocates a dentry. It returns %NULL if there is insufficient memory
+ * available. On a success the dentry is returned. The name passed in is
+ * copied and the copy passed in may be reused after this call.
+ */
+struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
+{
+        struct dentry *dentry = __d_alloc(parent->d_sb, name);
+        if (!dentry)
+                return NULL;
+
+        spin_lock(&parent->d_lock);
+        /*
+         * don't need child lock because it is not subject
+         * to concurrency here
+         */
+        __dget_dlock(parent);
+        dentry->d_parent = parent;
+        list_add(&dentry->d_u.d_child, &parent->d_subdirs);
+        spin_unlock(&parent->d_lock);
+
+        return dentry;
+}
 EXPORT_SYMBOL(d_alloc);
 
 struct dentry *d_alloc_pseudo(struct super_block *sb, const struct qstr *name)
 {
-        struct dentry *dentry = d_alloc(NULL, name);
-        if (dentry) {
-                dentry->d_sb = sb;
-                d_set_d_op(dentry, dentry->d_sb->s_d_op);
-                dentry->d_parent = dentry;
+        struct dentry *dentry = __d_alloc(sb, name);
+        if (dentry)
                 dentry->d_flags |= DCACHE_DISCONNECTED;
-        }
         return dentry;
 }
 EXPORT_SYMBOL(d_alloc_pseudo);
@@ -1499,13 +1433,9 @@ struct dentry * d_alloc_root(struct inode * root_inode)
         if (root_inode) {
                 static const struct qstr name = { .name = "/", .len = 1 };
 
-                res = d_alloc(NULL, &name);
-                if (res) {
-                        res->d_sb = root_inode->i_sb;
-                        d_set_d_op(res, res->d_sb->s_d_op);
-                        res->d_parent = res;
+                res = __d_alloc(root_inode->i_sb, &name);
+                if (res)
                         d_instantiate(res, root_inode);
-                }
         }
         return res;
 }
@@ -1566,13 +1496,11 @@ struct dentry *d_obtain_alias(struct inode *inode)
         if (res)
                 goto out_iput;
 
-        tmp = d_alloc(NULL, &anonstring);
+        tmp = __d_alloc(inode->i_sb, &anonstring);
         if (!tmp) {
                 res = ERR_PTR(-ENOMEM);
                 goto out_iput;
         }
-        tmp->d_parent = tmp; /* make sure dput doesn't croak */
-
 
         spin_lock(&inode->i_lock);
         res = __d_find_any_alias(inode);
@@ -1584,8 +1512,6 @@ struct dentry *d_obtain_alias(struct inode *inode)
 
         /* attach a disconnected dentry */
         spin_lock(&tmp->d_lock);
-        tmp->d_sb = inode->i_sb;
-        d_set_d_op(tmp, tmp->d_sb->s_d_op);
         tmp->d_inode = inode;
         tmp->d_flags |= DCACHE_DISCONNECTED;
         list_add(&tmp->d_alias, &inode->i_dentry);
@@ -1626,6 +1552,9 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
 {
         struct dentry *new = NULL;
 
+        if (IS_ERR(inode))
+                return ERR_CAST(inode);
+
         if (inode && S_ISDIR(inode->i_mode)) {
                 spin_lock(&inode->i_lock);
                 new = __d_find_alias(inode, 1);
@@ -1708,29 +1637,22 @@ struct dentry *d_add_ci(struct dentry *dentry, struct inode *inode,
         }
 
         /*
-         * Negative dentry: instantiate it unless the inode is a directory and
-         * already has a dentry.
+         * We are going to instantiate this dentry, unhash it and clear the
+         * lookup flag so we can do that.
          */
-        spin_lock(&inode->i_lock);
-        if (!S_ISDIR(inode->i_mode) || list_empty(&inode->i_dentry)) {
-                __d_instantiate(found, inode);
-                spin_unlock(&inode->i_lock);
-                security_d_instantiate(found, inode);
-                return found;
-        }
+        if (unlikely(d_need_lookup(found)))
+                d_clear_need_lookup(found);
 
         /*
-         * In case a directory already has a (disconnected) entry grab a
-         * reference to it, move it in place and use it.
+         * Negative dentry: instantiate it unless the inode is a directory and
+         * already has a dentry.
          */
-        new = list_entry(inode->i_dentry.next, struct dentry, d_alias);
-        __dget(new);
-        spin_unlock(&inode->i_lock);
-        security_d_instantiate(found, inode);
-        d_move(new, found);
-        iput(inode);
-        dput(found);
-        return new;
+        new = d_splice_alias(inode, found);
+        if (new) {
+                dput(found);
+                found = new;
+        }
+        return found;
 
 err_out:
         iput(inode);
@@ -3045,8 +2967,6 @@ static void __init dcache_init(void)
          */
         dentry_cache = KMEM_CACHE(dentry,
                 SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|SLAB_MEM_SPREAD);
-        
-        register_shrinker(&dcache_shrinker);
 
         /* Hash may have been set up in dcache_init_early */
         if (!hashdist)
diff --git a/fs/direct-io.c b/fs/direct-io.c
index ac5f164170e3..01d2d9ef609c 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -135,6 +135,50 @@ struct dio {
         struct page *pages[DIO_PAGES];  /* page buffer */
 };
 
+static void __inode_dio_wait(struct inode *inode)
+{
+        wait_queue_head_t *wq = bit_waitqueue(&inode->i_state, __I_DIO_WAKEUP);
+        DEFINE_WAIT_BIT(q, &inode->i_state, __I_DIO_WAKEUP);
+
+        do {
+                prepare_to_wait(wq, &q.wait, TASK_UNINTERRUPTIBLE);
+                if (atomic_read(&inode->i_dio_count))
+                        schedule();
+        } while (atomic_read(&inode->i_dio_count));
+        finish_wait(wq, &q.wait);
+}
+
+/**
+ * inode_dio_wait - wait for outstanding DIO requests to finish
+ * @inode: inode to wait for
+ *
+ * Waits for all pending direct I/O requests to finish so that we can
+ * proceed with a truncate or equivalent operation.
+ *
+ * Must be called under a lock that serializes taking new references
+ * to i_dio_count, usually by inode->i_mutex.
+ */
+void inode_dio_wait(struct inode *inode)
+{
+        if (atomic_read(&inode->i_dio_count))
+                __inode_dio_wait(inode);
+}
+EXPORT_SYMBOL_GPL(inode_dio_wait);
+
+/*
+ * inode_dio_done - signal finish of a direct I/O requests
+ * @inode: inode the direct I/O happens on
+ *
+ * This is called once we've finished processing a direct I/O request,
+ * and is used to wake up callers waiting for direct I/O to be quiesced.
+ */
+void inode_dio_done(struct inode *inode)
+{
+        if (atomic_dec_and_test(&inode->i_dio_count))
+                wake_up_bit(&inode->i_state, __I_DIO_WAKEUP);
+}
+EXPORT_SYMBOL_GPL(inode_dio_done);
+
 /*
  * How many pages are in the queue?
  */
@@ -249,14 +293,12 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is
         if (dio->end_io && dio->result) {
                 dio->end_io(dio->iocb, offset, transferred,
                             dio->map_bh.b_private, ret, is_async);
-        } else if (is_async) {
-                aio_complete(dio->iocb, ret, 0);
+        } else {
+                if (is_async)
+                        aio_complete(dio->iocb, ret, 0);
+                inode_dio_done(dio->inode);
         }
 
-        if (dio->flags & DIO_LOCKING)
-                /* lockdep: non-owner release */
-                up_read_non_owner(&dio->inode->i_alloc_sem);
-
         return ret;
 }
 
@@ -980,9 +1022,6 @@ out:
         return ret;
 }
 
-/*
- * Releases both i_mutex and i_alloc_sem
- */
 static ssize_t
 direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode, 
         const struct iovec *iov, loff_t offset, unsigned long nr_segs, 
@@ -1146,15 +1185,16 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
  *    For writes this function is called under i_mutex and returns with
  *    i_mutex held, for reads, i_mutex is not held on entry, but it is
  *    taken and dropped again before returning.
- *    For reads and writes i_alloc_sem is taken in shared mode and released
- *    on I/O completion (which may happen asynchronously after returning to
- *    the caller).
- *
  *  - if the flags value does NOT contain DIO_LOCKING we don't use any
  *    internal locking but rather rely on the filesystem to synchronize
  *    direct I/O reads/writes versus each other and truncate.
- *    For reads and writes both i_mutex and i_alloc_sem are not held on
- *    entry and are never taken.
+ *
+ * To help with locking against truncate we incremented the i_dio_count
+ * counter before starting direct I/O, and decrement it once we are done.
+ * Truncate can wait for it to reach zero to provide exclusion.  It is
+ * expected that filesystem provide exclusion between new direct I/O
+ * and truncates.  For DIO_LOCKING filesystems this is done by i_mutex,
+ * but other filesystems need to take care of this on their own.
  */
 ssize_t
 __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
@@ -1200,6 +1240,10 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
                 }
         }
 
+        /* watch out for a 0 len io from a tricksy fs */
+        if (rw == READ && end == offset)
+                return 0;
+
         dio = kmalloc(sizeof(*dio), GFP_KERNEL);
         retval = -ENOMEM;
         if (!dio)
@@ -1213,8 +1257,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 
         dio->flags = flags;
         if (dio->flags & DIO_LOCKING) {
-                /* watch out for a 0 len io from a tricksy fs */
-                if (rw == READ && end > offset) {
+                if (rw == READ) {
                         struct address_space *mapping =
                                         iocb->ki_filp->f_mapping;
 
@@ -1229,15 +1272,14 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
                                 goto out;
                         }
                 }
-
-                /*
-                 * Will be released at I/O completion, possibly in a
-                 * different thread.
-                 */
-                down_read_non_owner(&inode->i_alloc_sem);
         }
 
         /*
+         * Will be decremented at I/O completion time.
+         */
+        atomic_inc(&inode->i_dio_count);
+
+        /*
          * For file extending writes updating i_size before data
          * writeouts complete can expose uninitialized blocks. So
          * even for AIO, we need to wait for i/o to complete before
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 4ec9eb00a241..c6ac98cf9baa 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -270,14 +270,15 @@ static int ecryptfs_release(struct inode *inode, struct file *file)
 }
 
 static int
-ecryptfs_fsync(struct file *file, int datasync)
+ecryptfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         int rc = 0;
 
-        rc = generic_file_fsync(file, datasync);
+        rc = generic_file_fsync(file, start, end, datasync);
         if (rc)
                 goto out;
-        rc = vfs_fsync(ecryptfs_file_to_lower(file), datasync);
+        rc = vfs_fsync_range(ecryptfs_file_to_lower(file), start, end,
+                             datasync);
 out:
         return rc;
 }
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 7349ade17de6..340c657a108c 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -147,7 +147,6 @@ static int ecryptfs_interpose(struct dentry *lower_dentry,
  * @lower_dir_inode: inode of the parent in the lower fs of the new file
  * @dentry: New file's dentry
  * @mode: The mode of the new file
- * @nd: nameidata of ecryptfs' parent's dentry & vfsmount
  *
  * Creates the file in the lower file system.
  *
@@ -155,31 +154,10 @@ static int ecryptfs_interpose(struct dentry *lower_dentry,
  */
 static int
 ecryptfs_create_underlying_file(struct inode *lower_dir_inode,
-                                struct dentry *dentry, int mode,
-                                struct nameidata *nd)
+                                struct dentry *dentry, int mode)
 {
         struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
-        struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
-        struct dentry *dentry_save;
-        struct vfsmount *vfsmount_save;
-        unsigned int flags_save;
-        int rc;
-
-        if (nd) {
-                dentry_save = nd->path.dentry;
-                vfsmount_save = nd->path.mnt;
-                flags_save = nd->flags;
-                nd->path.dentry = lower_dentry;
-                nd->path.mnt = lower_mnt;
-                nd->flags &= ~LOOKUP_OPEN;
-        }
-        rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd);
-        if (nd) {
-                nd->path.dentry = dentry_save;
-                nd->path.mnt = vfsmount_save;
-                nd->flags = flags_save;
-        }
-        return rc;
+        return vfs_create(lower_dir_inode, lower_dentry, mode, NULL);
 }
 
 /**
@@ -197,8 +175,7 @@ ecryptfs_create_underlying_file(struct inode *lower_dir_inode,
  */
 static int
 ecryptfs_do_create(struct inode *directory_inode,
-                   struct dentry *ecryptfs_dentry, int mode,
-                   struct nameidata *nd)
+                   struct dentry *ecryptfs_dentry, int mode)
 {
         int rc;
         struct dentry *lower_dentry;
@@ -213,7 +190,7 @@ ecryptfs_do_create(struct inode *directory_inode,
                 goto out;
         }
         rc = ecryptfs_create_underlying_file(lower_dir_dentry->d_inode,
-                                             ecryptfs_dentry, mode, nd);
+                                             ecryptfs_dentry, mode);
         if (rc) {
                 printk(KERN_ERR "%s: Failure to create dentry in lower fs; "
                        "rc = [%d]\n", __func__, rc);
@@ -294,7 +271,7 @@ ecryptfs_create(struct inode *directory_inode, struct dentry *ecryptfs_dentry,
         int rc;
 
         /* ecryptfs_do_create() calls ecryptfs_interpose() */
-        rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode, nd);
+        rc = ecryptfs_do_create(directory_inode, ecryptfs_dentry, mode);
         if (unlikely(rc)) {
                 ecryptfs_printk(KERN_WARNING, "Failed to create file in"
                                 "lower filesystem\n");
@@ -942,10 +919,8 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
 }
 
 static int
-ecryptfs_permission(struct inode *inode, int mask, unsigned int flags)
+ecryptfs_permission(struct inode *inode, int mask)
 {
-        if (flags & IPERM_FLAG_RCU)
-                return -ECHILD;
         return inode_permission(ecryptfs_inode_to_lower(inode), mask);
 }
 
diff --git a/fs/efs/namei.c b/fs/efs/namei.c
index 1511bf9e5f80..832b10ded82f 100644
--- a/fs/efs/namei.c
+++ b/fs/efs/namei.c
@@ -60,14 +60,11 @@ static efs_ino_t efs_find_entry(struct inode *inode, const char *name, int len)
 
 struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) {
         efs_ino_t inodenum;
-        struct inode * inode = NULL;
+        struct inode *inode = NULL;
 
         inodenum = efs_find_entry(dir, dentry->d_name.name, dentry->d_name.len);
-        if (inodenum) {
+        if (inodenum)
                 inode = efs_iget(dir->i_sb, inodenum);
-                if (IS_ERR(inode))
-                        return ERR_CAST(inode);
-        }
 
         return d_splice_alias(inode, dentry);
 }
diff --git a/fs/exec.c b/fs/exec.c
index d9576f261815..842d5700c155 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1114,6 +1114,13 @@ out:
 }
 EXPORT_SYMBOL(flush_old_exec);
 
+void would_dump(struct linux_binprm *bprm, struct file *file)
+{
+        if (inode_permission(file->f_path.dentry->d_inode, MAY_READ) < 0)
+                bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
+}
+EXPORT_SYMBOL(would_dump);
+
 void setup_new_exec(struct linux_binprm * bprm)
 {
         int i, ch;
@@ -1153,9 +1160,10 @@ void setup_new_exec(struct linux_binprm * bprm)
         if (bprm->cred->uid != current_euid() ||
             bprm->cred->gid != current_egid()) {
                 current->pdeath_signal = 0;
-        } else if (file_permission(bprm->file, MAY_READ) ||
-                   bprm->interp_flags & BINPRM_FLAGS_ENFORCE_NONDUMP) {
-                set_dumpable(current->mm, suid_dumpable);
+        } else {
+                would_dump(bprm, bprm->file);
+                if (bprm->interp_flags & BINPRM_FLAGS_ENFORCE_NONDUMP)
+                        set_dumpable(current->mm, suid_dumpable);
         }
 
         /*
diff --git a/fs/exofs/file.c b/fs/exofs/file.c
index 45ca323d8363..491c6c078e7f 100644
--- a/fs/exofs/file.c
+++ b/fs/exofs/file.c
@@ -42,11 +42,19 @@ static int exofs_release_file(struct inode *inode, struct file *filp)
  *   Note, in exofs all metadata is written as part of inode, regardless.
  *   The writeout is synchronous
  */
-static int exofs_file_fsync(struct file *filp, int datasync)
+static int exofs_file_fsync(struct file *filp, loff_t start, loff_t end,
+                            int datasync)
 {
+        struct inode *inode = filp->f_mapping->host;
         int ret;
 
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+
+        mutex_lock(&inode->i_mutex);
         ret = sync_inode_metadata(filp->f_mapping->host, 1);
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
 
diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c
index 4d70db110cfc..b54c43775f17 100644
--- a/fs/exofs/namei.c
+++ b/fs/exofs/namei.c
@@ -55,12 +55,7 @@ static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry,
                 return ERR_PTR(-ENAMETOOLONG);
 
         ino = exofs_inode_by_name(dir, dentry);
-        inode = NULL;
-        if (ino) {
-                inode = exofs_iget(dir->i_sb, ino);
-                if (IS_ERR(inode))
-                        return ERR_CAST(inode);
-        }
+        inode = ino ? exofs_iget(dir->i_sb, ino) : NULL;
         return d_splice_alias(inode, dentry);
 }
 
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index abea5a17c764..bfe651f9ae16 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -232,11 +232,11 @@ ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
 }
 
 int
-ext2_check_acl(struct inode *inode, int mask, unsigned int flags)
+ext2_check_acl(struct inode *inode, int mask)
 {
         struct posix_acl *acl;
 
-        if (flags & IPERM_FLAG_RCU) {
+        if (mask & MAY_NOT_BLOCK) {
                 if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
                         return -ECHILD;
                 return -EAGAIN;
diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h
index c939b7b12099..3ff6cbb9ac44 100644
--- a/fs/ext2/acl.h
+++ b/fs/ext2/acl.h
@@ -54,7 +54,7 @@ static inline int ext2_acl_count(size_t size)
 #ifdef CONFIG_EXT2_FS_POSIX_ACL
 
 /* acl.c */
-extern int ext2_check_acl (struct inode *, int, unsigned int);
+extern int ext2_check_acl (struct inode *, int);
 extern int ext2_acl_chmod (struct inode *);
 extern int ext2_init_acl (struct inode *, struct inode *);
 
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 645be9e7ee47..af9fc89b1b2d 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -150,7 +150,8 @@ extern void ext2_write_super (struct super_block *);
 extern const struct file_operations ext2_dir_operations;
 
 /* file.c */
-extern int ext2_fsync(struct file *file, int datasync);
+extern int ext2_fsync(struct file *file, loff_t start, loff_t end,
+                      int datasync);
 extern const struct inode_operations ext2_file_inode_operations;
 extern const struct file_operations ext2_file_operations;
 extern const struct file_operations ext2_xip_file_operations;
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 49eec9456c5b..82e06321de35 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -40,13 +40,13 @@ static int ext2_release_file (struct inode * inode, struct file * filp)
         return 0;
 }
 
-int ext2_fsync(struct file *file, int datasync)
+int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         int ret;
         struct super_block *sb = file->f_mapping->host->i_sb;
         struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
 
-        ret = generic_file_fsync(file, datasync);
+        ret = generic_file_fsync(file, start, end, datasync);
         if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
                 /* We don't really know where the IO error happened... */
                 ext2_error(sb, __func__,
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 788e09a07f7e..a8a58f63f07c 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -843,8 +843,8 @@ ext2_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
         struct inode *inode = mapping->host;
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev,
-                                iov, offset, nr_segs, ext2_get_block, NULL);
+        ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                 ext2_get_block);
         if (ret < 0 && (rw & WRITE))
                 ext2_write_failed(mapping, offset + iov_length(iov, nr_segs));
         return ret;
@@ -1184,6 +1184,8 @@ static int ext2_setsize(struct inode *inode, loff_t newsize)
         if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
                 return -EPERM;
 
+        inode_dio_wait(inode);
+
         if (mapping_is_xip(inode->i_mapping))
                 error = xip_truncate_page(inode->i_mapping, newsize);
         else if (test_opt(inode->i_sb, NOBH))
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index ed5c5d496ee9..d60b7099e2db 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -67,15 +67,11 @@ static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, str
         inode = NULL;
         if (ino) {
                 inode = ext2_iget(dir->i_sb, ino);
-                if (IS_ERR(inode)) {
-                        if (PTR_ERR(inode) == -ESTALE) {
-                                ext2_error(dir->i_sb, __func__,
-                                                "deleted inode referenced: %lu",
-                                                (unsigned long) ino);
-                                return ERR_PTR(-EIO);
-                        } else {
-                                return ERR_CAST(inode);
-                        }
+                if (inode == ERR_PTR(-ESTALE)) {
+                        ext2_error(dir->i_sb, __func__,
+                                        "deleted inode referenced: %lu",
+                                        (unsigned long) ino);
+                        return ERR_PTR(-EIO);
                 }
         }
         return d_splice_alias(inode, dentry);
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index 9d021c0d472a..edfeb293d4cb 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -240,11 +240,11 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type,
 }
 
 int
-ext3_check_acl(struct inode *inode, int mask, unsigned int flags)
+ext3_check_acl(struct inode *inode, int mask)
 {
         struct posix_acl *acl;
 
-        if (flags & IPERM_FLAG_RCU) {
+        if (mask & MAY_NOT_BLOCK) {
                 if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
                         return -ECHILD;
                 return -EAGAIN;
diff --git a/fs/ext3/acl.h b/fs/ext3/acl.h
index 5faf8048e906..597334626de9 100644
--- a/fs/ext3/acl.h
+++ b/fs/ext3/acl.h
@@ -54,7 +54,7 @@ static inline int ext3_acl_count(size_t size)
 #ifdef CONFIG_EXT3_FS_POSIX_ACL
 
 /* acl.c */
-extern int ext3_check_acl (struct inode *, int, unsigned int);
+extern int ext3_check_acl (struct inode *, int);
 extern int ext3_acl_chmod (struct inode *);
 extern int ext3_init_acl (handle_t *, struct inode *, struct inode *);
 
diff --git a/fs/ext3/fsync.c b/fs/ext3/fsync.c
index 09b13bb34c94..0bcf63adb80a 100644
--- a/fs/ext3/fsync.c
+++ b/fs/ext3/fsync.c
@@ -43,7 +43,7 @@
  * inode to disk.
  */
 
-int ext3_sync_file(struct file *file, int datasync)
+int ext3_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         struct ext3_inode_info *ei = EXT3_I(inode);
@@ -54,6 +54,17 @@ int ext3_sync_file(struct file *file, int datasync)
         if (inode->i_sb->s_flags & MS_RDONLY)
                 return 0;
 
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+
+        /*
+         * Taking the mutex here just to keep consistent with how fsync was
+         * called previously, however it looks like we don't need to take
+         * i_mutex at all.
+         */
+        mutex_lock(&inode->i_mutex);
+
         J_ASSERT(ext3_journal_current_handle() == NULL);
 
         /*
@@ -70,8 +81,10 @@ int ext3_sync_file(struct file *file, int datasync)
          *  (they were dirtied by commit).  But that's OK - the blocks are
          *  safe in-journal, which is all fsync() needs to ensure.
          */
-        if (ext3_should_journal_data(inode))
+        if (ext3_should_journal_data(inode)) {
+                mutex_unlock(&inode->i_mutex);
                 return ext3_force_commit(inode->i_sb);
+        }
 
         if (datasync)
                 commit_tid = atomic_read(&ei->i_datasync_tid);
@@ -91,5 +104,6 @@ int ext3_sync_file(struct file *file, int datasync)
          */
         if (needs_barrier)
                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 3451d23c3bae..2978a2a17a59 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1816,9 +1816,8 @@ static ssize_t ext3_direct_IO(int rw, struct kiocb *iocb,
         }
 
 retry:
-        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
-                                 offset, nr_segs,
-                                 ext3_get_block, NULL);
+        ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                 ext3_get_block);
         /*
          * In case of error extending write may have instantiated a few
          * blocks outside i_size. Trim these off again.
@@ -3216,6 +3215,9 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
                 ext3_journal_stop(handle);
         }
 
+        if (attr->ia_valid & ATTR_SIZE)
+                inode_dio_wait(inode);
+
         if (S_ISREG(inode->i_mode) &&
             attr->ia_valid & ATTR_SIZE && attr->ia_size < inode->i_size) {
                 handle_t *handle;
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 34b6d9bfc48a..c095cf5640c7 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1038,15 +1038,11 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str
                         return ERR_PTR(-EIO);
                 }
                 inode = ext3_iget(dir->i_sb, ino);
-                if (IS_ERR(inode)) {
-                        if (PTR_ERR(inode) == -ESTALE) {
-                                ext3_error(dir->i_sb, __func__,
-                                                "deleted inode referenced: %lu",
-                                                ino);
-                                return ERR_PTR(-EIO);
-                        } else {
-                                return ERR_CAST(inode);
-                        }
+                if (inode == ERR_PTR(-ESTALE)) {
+                        ext3_error(dir->i_sb, __func__,
+                                        "deleted inode referenced: %lu",
+                                        ino);
+                        return ERR_PTR(-EIO);
                 }
         }
         return d_splice_alias(inode, dentry);
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index aad153ef6b78..b57ea2f91269 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1718,6 +1718,8 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
         sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
         sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
 
+        /* enable barriers by default */
+        set_opt(sbi->s_mount_opt, BARRIER);
         set_opt(sbi->s_mount_opt, RESERVATION);
 
         if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 21eacd7b7d79..60d900fcc3db 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -238,11 +238,11 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type,
 }
 
 int
-ext4_check_acl(struct inode *inode, int mask, unsigned int flags)
+ext4_check_acl(struct inode *inode, int mask)
 {
         struct posix_acl *acl;
 
-        if (flags & IPERM_FLAG_RCU) {
+        if (mask & MAY_NOT_BLOCK) {
                 if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
                         return -ECHILD;
                 return -EAGAIN;
diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h
index dec821168fd4..9d843d5deac4 100644
--- a/fs/ext4/acl.h
+++ b/fs/ext4/acl.h
@@ -54,7 +54,7 @@ static inline int ext4_acl_count(size_t size)
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
 
 /* acl.c */
-extern int ext4_check_acl(struct inode *, int, unsigned int);
+extern int ext4_check_acl(struct inode *, int);
 extern int ext4_acl_chmod(struct inode *);
 extern int ext4_init_acl(handle_t *, struct inode *, struct inode *);
 
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 1921392cd708..fa44df879711 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1758,7 +1758,7 @@ extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash,
 extern void ext4_htree_free_dir_info(struct dir_private_info *p);
 
 /* fsync.c */
-extern int ext4_sync_file(struct file *, int);
+extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
 extern int ext4_flush_completed_IO(struct inode *);
 
 /* hash.c */
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 2c0972322009..ce766f974b1d 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -236,6 +236,27 @@ loff_t ext4_llseek(struct file *file, loff_t offset, int origin)
                 }
                 offset += file->f_pos;
                 break;
+        case SEEK_DATA:
+                /*
+                 * 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 >= inode->i_size) {
+                        mutex_unlock(&inode->i_mutex);
+                        return -ENXIO;
+                }
+                break;
+        case SEEK_HOLE:
+                /*
+                 * 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 >= inode->i_size) {
+                        mutex_unlock(&inode->i_mutex);
+                        return -ENXIO;
+                }
+                offset = inode->i_size;
+                break;
         }
 
         if (offset < 0 || offset > maxbytes) {
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index ce66d2fe826c..da3bed3e0c29 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -151,6 +151,32 @@ static int ext4_sync_parent(struct inode *inode)
         return ret;
 }
 
+/**
+ * __sync_file - generic_file_fsync without the locking and filemap_write
+ * @inode:      inode to sync
+ * @datasync:   only sync essential metadata if true
+ *
+ * This is just generic_file_fsync without the locking.  This is needed for
+ * nojournal mode to make sure this inodes data/metadata makes it to disk
+ * properly.  The i_mutex should be held already.
+ */
+static int __sync_inode(struct inode *inode, int datasync)
+{
+        int err;
+        int ret;
+
+        ret = sync_mapping_buffers(inode->i_mapping);
+        if (!(inode->i_state & I_DIRTY))
+                return ret;
+        if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
+                return ret;
+
+        err = sync_inode_metadata(inode, 1);
+        if (ret == 0)
+                ret = err;
+        return ret;
+}
+
 /*
  * akpm: A new design for ext4_sync_file().
  *
@@ -165,7 +191,7 @@ static int ext4_sync_parent(struct inode *inode)
  * i_mutex lock is held when entering and exiting this function
  */
 
-int ext4_sync_file(struct file *file, int datasync)
+int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         struct ext4_inode_info *ei = EXT4_I(inode);
@@ -178,15 +204,20 @@ int ext4_sync_file(struct file *file, int datasync)
 
         trace_ext4_sync_file_enter(file, datasync);
 
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+        mutex_lock(&inode->i_mutex);
+
         if (inode->i_sb->s_flags & MS_RDONLY)
-                return 0;
+                goto out;
 
         ret = ext4_flush_completed_IO(inode);
         if (ret < 0)
                 goto out;
 
         if (!journal) {
-                ret = generic_file_fsync(file, datasync);
+                ret = __sync_inode(inode, datasync);
                 if (!ret && !list_empty(&inode->i_dentry))
                         ret = ext4_sync_parent(inode);
                 goto out;
@@ -220,6 +251,7 @@ int ext4_sync_file(struct file *file, int datasync)
         if (needs_barrier)
                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
  out:
+        mutex_unlock(&inode->i_mutex);
         trace_ext4_sync_file_exit(inode, ret);
         return ret;
 }
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index e3126c051006..678cde834f19 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3501,10 +3501,8 @@ retry:
                                  offset, nr_segs,
                                  ext4_get_block, NULL, NULL, 0);
         else {
-                ret = blockdev_direct_IO(rw, iocb, inode,
-                                 inode->i_sb->s_bdev, iov,
-                                 offset, nr_segs,
-                                 ext4_get_block, NULL);
+                ret = blockdev_direct_IO(rw, iocb, inode, iov,
+                                 offset, nr_segs, ext4_get_block);
 
                 if (unlikely((rw & WRITE) && ret < 0)) {
                         loff_t isize = i_size_read(inode);
@@ -3575,6 +3573,7 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
                             ssize_t size, void *private, int ret,
                             bool is_async)
 {
+        struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
         ext4_io_end_t *io_end = iocb->private;
         struct workqueue_struct *wq;
         unsigned long flags;
@@ -3596,6 +3595,7 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
 out:
                 if (is_async)
                         aio_complete(iocb, ret, 0);
+                inode_dio_done(inode);
                 return;
         }
 
@@ -3616,6 +3616,9 @@ out:
         /* queue the work to convert unwritten extents to written */
         queue_work(wq, &io_end->work);
         iocb->private = NULL;
+
+        /* XXX: probably should move into the real I/O completion handler */
+        inode_dio_done(inode);
 }
 
 static void ext4_end_io_buffer_write(struct buffer_head *bh, int uptodate)
@@ -3748,11 +3751,13 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
                         EXT4_I(inode)->cur_aio_dio = iocb->private;
                 }
 
-                ret = blockdev_direct_IO(rw, iocb, inode,
+                ret = __blockdev_direct_IO(rw, iocb, inode,
                                          inode->i_sb->s_bdev, iov,
                                          offset, nr_segs,
                                          ext4_get_block_write,
-                                         ext4_end_io_dio);
+                                         ext4_end_io_dio,
+                                         NULL,
+                                         DIO_LOCKING | DIO_SKIP_HOLES);
                 if (iocb->private)
                         EXT4_I(inode)->cur_aio_dio = NULL;
                 /*
@@ -5351,6 +5356,8 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
         }
 
         if (attr->ia_valid & ATTR_SIZE) {
+                inode_dio_wait(inode);
+
                 if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
                         struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 
@@ -5843,80 +5850,84 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
         struct page *page = vmf->page;
         loff_t size;
         unsigned long len;
-        int ret = -EINVAL;
-        void *fsdata;
+        int ret;
         struct file *file = vma->vm_file;
         struct inode *inode = file->f_path.dentry->d_inode;
         struct address_space *mapping = inode->i_mapping;
+        handle_t *handle;
+        get_block_t *get_block;
+        int retries = 0;
 
         /*
-         * Get i_alloc_sem to stop truncates messing with the inode. We cannot
-         * get i_mutex because we are already holding mmap_sem.
+         * This check is racy but catches the common case. We rely on
+         * __block_page_mkwrite() to do a reliable check.
          */
-        down_read(&inode->i_alloc_sem);
-        size = i_size_read(inode);
-        if (page->mapping != mapping || size <= page_offset(page)
-            || !PageUptodate(page)) {
-                /* page got truncated from under us? */
-                goto out_unlock;
+        vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
+        /* Delalloc case is easy... */
+        if (test_opt(inode->i_sb, DELALLOC) &&
+            !ext4_should_journal_data(inode) &&
+            !ext4_nonda_switch(inode->i_sb)) {
+                do {
+                        ret = __block_page_mkwrite(vma, vmf,
+                                                   ext4_da_get_block_prep);
+                } while (ret == -ENOSPC &&
+                       ext4_should_retry_alloc(inode->i_sb, &retries));
+                goto out_ret;
         }
-        ret = 0;
 
         lock_page(page);
-        wait_on_page_writeback(page);
-        if (PageMappedToDisk(page)) {
-                up_read(&inode->i_alloc_sem);
-                return VM_FAULT_LOCKED;
+        size = i_size_read(inode);
+        /* Page got truncated from under us? */
+        if (page->mapping != mapping || page_offset(page) > size) {
+                unlock_page(page);
+                ret = VM_FAULT_NOPAGE;
+                goto out;
         }
 
         if (page->index == size >> PAGE_CACHE_SHIFT)
                 len = size & ~PAGE_CACHE_MASK;
         else
                 len = PAGE_CACHE_SIZE;
-
         /*
-         * return if we have all the buffers mapped. This avoid
-         * the need to call write_begin/write_end which does a
-         * journal_start/journal_stop which can block and take
-         * long time
+         * Return if we have all the buffers mapped. This avoids the need to do
+         * journal_start/journal_stop which can block and take a long time
          */
         if (page_has_buffers(page)) {
                 if (!walk_page_buffers(NULL, page_buffers(page), 0, len, NULL,
                                         ext4_bh_unmapped)) {
-                        up_read(&inode->i_alloc_sem);
-                        return VM_FAULT_LOCKED;
+                        /* Wait so that we don't change page under IO */
+                        wait_on_page_writeback(page);
+                        ret = VM_FAULT_LOCKED;
+                        goto out;
                 }
         }
         unlock_page(page);
-        /*
-         * OK, we need to fill the hole... Do write_begin write_end
-         * to do block allocation/reservation.We are not holding
-         * inode.i__mutex here. That allow * parallel write_begin,
-         * write_end call. lock_page prevent this from happening
-         * on the same page though
-         */
-        ret = mapping->a_ops->write_begin(file, mapping, page_offset(page),
-                        len, AOP_FLAG_UNINTERRUPTIBLE, &page, &fsdata);
-        if (ret < 0)
-                goto out_unlock;
-        ret = mapping->a_ops->write_end(file, mapping, page_offset(page),
-                        len, len, page, fsdata);
-        if (ret < 0)
-                goto out_unlock;
-        ret = 0;
-
-        /*
-         * write_begin/end might have created a dirty page and someone
-         * could wander in and start the IO.  Make sure that hasn't
-         * happened.
-         */
-        lock_page(page);
-        wait_on_page_writeback(page);
-        up_read(&inode->i_alloc_sem);
-        return VM_FAULT_LOCKED;
-out_unlock:
-        if (ret)
+        /* OK, we need to fill the hole... */
+        if (ext4_should_dioread_nolock(inode))
+                get_block = ext4_get_block_write;
+        else
+                get_block = ext4_get_block;
+retry_alloc:
+        handle = ext4_journal_start(inode, ext4_writepage_trans_blocks(inode));
+        if (IS_ERR(handle)) {
                 ret = VM_FAULT_SIGBUS;
-        up_read(&inode->i_alloc_sem);
+                goto out;
+        }
+        ret = __block_page_mkwrite(vma, vmf, get_block);
+        if (!ret && ext4_should_journal_data(inode)) {
+                if (walk_page_buffers(handle, page_buffers(page), 0,
+                          PAGE_CACHE_SIZE, NULL, do_journal_get_write_access)) {
+                        unlock_page(page);
+                        ret = VM_FAULT_SIGBUS;
+                        goto out;
+                }
+                ext4_set_inode_state(inode, EXT4_STATE_JDATA);
+        }
+        ext4_journal_stop(handle);
+        if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+                goto retry_alloc;
+out_ret:
+        ret = block_page_mkwrite_return(ret);
+out:
         return ret;
 }
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index b754b7721f51..707d605bf769 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1037,15 +1037,11 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru
                         return ERR_PTR(-EIO);
                 }
                 inode = ext4_iget(dir->i_sb, ino);
-                if (IS_ERR(inode)) {
-                        if (PTR_ERR(inode) == -ESTALE) {
-                                EXT4_ERROR_INODE(dir,
-                                                 "deleted inode referenced: %u",
-                                                 ino);
-                                return ERR_PTR(-EIO);
-                        } else {
-                                return ERR_CAST(inode);
-                        }
+                if (inode == ERR_PTR(-ESTALE)) {
+                        EXT4_ERROR_INODE(dir,
+                                         "deleted inode referenced: %u",
+                                         ino);
+                        return ERR_PTR(-EIO);
                 }
         }
         return d_splice_alias(inode, dentry);
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 8276cc282dec..a5d3853822e0 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -109,6 +109,7 @@ struct msdos_inode_info {
         int i_attrs;            /* unused attribute bits */
         loff_t i_pos;           /* on-disk position of directory entry or 0 */
         struct hlist_node i_fat_hash;   /* hash by i_location */
+        struct rw_semaphore truncate_lock; /* protect bmap against truncate */
         struct inode vfs_inode;
 };
 
@@ -309,7 +310,8 @@ extern int fat_setattr(struct dentry * dentry, struct iattr * attr);
 extern void fat_truncate_blocks(struct inode *inode, loff_t offset);
 extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry,
                        struct kstat *stat);
-extern int fat_file_fsync(struct file *file, int datasync);
+extern int fat_file_fsync(struct file *file, loff_t start, loff_t end,
+                          int datasync);
 
 /* fat/inode.c */
 extern void fat_attach(struct inode *inode, loff_t i_pos);
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 7018e1d8902d..c118acf16e43 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -149,12 +149,12 @@ static int fat_file_release(struct inode *inode, struct file *filp)
         return 0;
 }
 
-int fat_file_fsync(struct file *filp, int datasync)
+int fat_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = filp->f_mapping->host;
         int res, err;
 
-        res = generic_file_fsync(filp, datasync);
+        res = generic_file_fsync(filp, start, end, datasync);
         err = sync_mapping_buffers(MSDOS_SB(inode->i_sb)->fat_inode->i_mapping);
 
         return res ? res : err;
@@ -397,6 +397,8 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
          * sequence.
          */
         if (attr->ia_valid & ATTR_SIZE) {
+                inode_dio_wait(inode);
+
                 if (attr->ia_size > inode->i_size) {
                         error = fat_cont_expand(inode, attr->ia_size);
                         if (error || attr->ia_valid == ATTR_SIZE)
@@ -429,8 +431,10 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
         }
 
         if (attr->ia_valid & ATTR_SIZE) {
+                down_write(&MSDOS_I(inode)->truncate_lock);
                 truncate_setsize(inode, attr->ia_size);
                 fat_truncate_blocks(inode, attr->ia_size);
+                up_write(&MSDOS_I(inode)->truncate_lock);
         }
 
         setattr_copy(inode, attr);
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index cb8d8391ac0b..5942fec22c65 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -211,8 +211,8 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
          * FAT need to use the DIO_LOCKING for avoiding the race
          * condition of fat_get_block() and ->truncate().
          */
-        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev,
-                                 iov, offset, nr_segs, fat_get_block, NULL);
+        ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                 fat_get_block);
         if (ret < 0 && (rw & WRITE))
                 fat_write_failed(mapping, offset + iov_length(iov, nr_segs));
 
@@ -224,9 +224,9 @@ static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
         sector_t blocknr;
 
         /* fat_get_cluster() assumes the requested blocknr isn't truncated. */
-        down_read(&mapping->host->i_alloc_sem);
+        down_read(&MSDOS_I(mapping->host)->truncate_lock);
         blocknr = generic_block_bmap(mapping, block, fat_get_block);
-        up_read(&mapping->host->i_alloc_sem);
+        up_read(&MSDOS_I(mapping->host)->truncate_lock);
 
         return blocknr;
 }
@@ -510,6 +510,8 @@ static struct inode *fat_alloc_inode(struct super_block *sb)
         ei = kmem_cache_alloc(fat_inode_cachep, GFP_NOFS);
         if (!ei)
                 return NULL;
+
+        init_rwsem(&ei->truncate_lock);
         return &ei->vfs_inode;
 }
 
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index 3b222dafd15b..66e83b845455 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -209,29 +209,20 @@ static struct dentry *msdos_lookup(struct inode *dir, struct dentry *dentry,
         int err;
 
         lock_super(sb);
-
         err = msdos_find(dir, dentry->d_name.name, dentry->d_name.len, &sinfo);
-        if (err) {
-                if (err == -ENOENT) {
-                        inode = NULL;
-                        goto out;
-                }
-                goto error;
-        }
-
-        inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
-        brelse(sinfo.bh);
-        if (IS_ERR(inode)) {
-                err = PTR_ERR(inode);
-                goto error;
+        switch (err) {
+        case -ENOENT:
+                inode = NULL;
+                break;
+        case 0:
+                inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
+                brelse(sinfo.bh);
+                break;
+        default:
+                inode = ERR_PTR(err);
         }
-out:
         unlock_super(sb);
         return d_splice_alias(inode, dentry);
-
-error:
-        unlock_super(sb);
-        return ERR_PTR(err);
 }
 
 /***** Creates a directory entry (name is already formatted). */
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 20b4ea53fdc4..bb3f29c3557b 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -82,10 +82,8 @@ 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_CONTINUE | LOOKUP_PARENT))) {
-                if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
-                        return 0;
-        }
+        if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+                return 0;
 
         return vfat_revalidate_shortname(dentry);
 }
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 0f015a0468de..b8c507ca42f7 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -461,32 +461,6 @@ writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
 }
 
 /*
- * For background writeback the caller does not have the sb pinned
- * before calling writeback. So make sure that we do pin it, so it doesn't
- * go away while we are writing inodes from it.
- */
-static bool pin_sb_for_writeback(struct super_block *sb)
-{
-        spin_lock(&sb_lock);
-        if (list_empty(&sb->s_instances)) {
-                spin_unlock(&sb_lock);
-                return false;
-        }
-
-        sb->s_count++;
-        spin_unlock(&sb_lock);
-
-        if (down_read_trylock(&sb->s_umount)) {
-                if (sb->s_root)
-                        return true;
-                up_read(&sb->s_umount);
-        }
-
-        put_super(sb);
-        return false;
-}
-
-/*
  * Write a portion of b_io inodes which belong to @sb.
  *
  * If @only_this_sb is true, then find and write all such
@@ -585,7 +559,7 @@ void writeback_inodes_wb(struct bdi_writeback *wb,
                 struct inode *inode = wb_inode(wb->b_io.prev);
                 struct super_block *sb = inode->i_sb;
 
-                if (!pin_sb_for_writeback(sb)) {
+                if (!grab_super_passive(sb)) {
                         requeue_io(inode);
                         continue;
                 }
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index d50160714595..9f63e493a9b6 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -382,7 +382,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
         struct fuse_entry_out outentry;
         struct fuse_file *ff;
         struct file *file;
-        int flags = nd->intent.open.flags - 1;
+        int flags = nd->intent.open.flags;
 
         if (fc->no_create)
                 return -ENOSYS;
@@ -576,7 +576,7 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
 static int fuse_create(struct inode *dir, struct dentry *entry, int mode,
                        struct nameidata *nd)
 {
-        if (nd && (nd->flags & LOOKUP_OPEN)) {
+        if (nd) {
                 int err = fuse_create_open(dir, entry, mode, nd);
                 if (err != -ENOSYS)
                         return err;
@@ -971,9 +971,9 @@ static int fuse_access(struct inode *inode, int mask)
         return err;
 }
 
-static int fuse_perm_getattr(struct inode *inode, int flags)
+static int fuse_perm_getattr(struct inode *inode, int mask)
 {
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         return fuse_do_getattr(inode, NULL, NULL);
@@ -992,7 +992,7 @@ static int fuse_perm_getattr(struct inode *inode, int flags)
  * access request is sent.  Execute permission is still checked
  * locally based on file mode.
  */
-static int fuse_permission(struct inode *inode, int mask, unsigned int flags)
+static int fuse_permission(struct inode *inode, int mask)
 {
         struct fuse_conn *fc = get_fuse_conn(inode);
         bool refreshed = false;
@@ -1011,23 +1011,22 @@ static int fuse_permission(struct inode *inode, int mask, unsigned int flags)
                 if (fi->i_time < get_jiffies_64()) {
                         refreshed = true;
 
-                        err = fuse_perm_getattr(inode, flags);
+                        err = fuse_perm_getattr(inode, mask);
                         if (err)
                                 return err;
                 }
         }
 
         if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
-                err = generic_permission(inode, mask, flags, NULL);
+                err = generic_permission(inode, mask);
 
                 /* If permission is denied, try to refresh file
                    attributes.  This is also needed, because the root
                    node will at first have no permissions */
                 if (err == -EACCES && !refreshed) {
-                        err = fuse_perm_getattr(inode, flags);
+                        err = fuse_perm_getattr(inode, mask);
                         if (!err)
-                                err = generic_permission(inode, mask,
-                                                        flags, NULL);
+                                err = generic_permission(inode, mask);
                 }
 
                 /* Note: the opposite of the above test does not
@@ -1035,7 +1034,7 @@ static int fuse_permission(struct inode *inode, int mask, unsigned int flags)
                    noticed immediately, only after the attribute
                    timeout has expired */
         } else if (mask & (MAY_ACCESS | MAY_CHDIR)) {
-                if (flags & IPERM_FLAG_RCU)
+                if (mask & MAY_NOT_BLOCK)
                         return -ECHILD;
 
                 err = fuse_access(inode, mask);
@@ -1044,7 +1043,7 @@ static int fuse_permission(struct inode *inode, int mask, unsigned int flags)
                         if (refreshed)
                                 return -EACCES;
 
-                        err = fuse_perm_getattr(inode, flags);
+                        err = fuse_perm_getattr(inode, mask);
                         if (!err && !(inode->i_mode & S_IXUGO))
                                 return -EACCES;
                 }
@@ -1177,9 +1176,10 @@ static int fuse_dir_release(struct inode *inode, struct file *file)
         return 0;
 }
 
-static int fuse_dir_fsync(struct file *file, int datasync)
+static int fuse_dir_fsync(struct file *file, loff_t start, loff_t end,
+                          int datasync)
 {
-        return fuse_fsync_common(file, datasync, 1);
+        return fuse_fsync_common(file, start, end, datasync, 1);
 }
 
 static bool update_mtime(unsigned ivalid)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 82a66466a24c..7bb685cdd00c 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -400,7 +400,8 @@ static void fuse_sync_writes(struct inode *inode)
         fuse_release_nowrite(inode);
 }
 
-int fuse_fsync_common(struct file *file, int datasync, int isdir)
+int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
+                      int datasync, int isdir)
 {
         struct inode *inode = file->f_mapping->host;
         struct fuse_conn *fc = get_fuse_conn(inode);
@@ -412,9 +413,15 @@ int fuse_fsync_common(struct file *file, int datasync, int isdir)
         if (is_bad_inode(inode))
                 return -EIO;
 
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+
         if ((!isdir && fc->no_fsync) || (isdir && fc->no_fsyncdir))
                 return 0;
 
+        mutex_lock(&inode->i_mutex);
+
         /*
          * Start writeback against all dirty pages of the inode, then
          * wait for all outstanding writes, before sending the FSYNC
@@ -422,13 +429,15 @@ int fuse_fsync_common(struct file *file, int datasync, int isdir)
          */
         err = write_inode_now(inode, 0);
         if (err)
-                return err;
+                goto out;
 
         fuse_sync_writes(inode);
 
         req = fuse_get_req(fc);
-        if (IS_ERR(req))
-                return PTR_ERR(req);
+        if (IS_ERR(req)) {
+                err = PTR_ERR(req);
+                goto out;
+        }
 
         memset(&inarg, 0, sizeof(inarg));
         inarg.fh = ff->fh;
@@ -448,12 +457,15 @@ int fuse_fsync_common(struct file *file, int datasync, int isdir)
                         fc->no_fsync = 1;
                 err = 0;
         }
+out:
+        mutex_unlock(&inode->i_mutex);
         return err;
 }
 
-static int fuse_fsync(struct file *file, int datasync)
+static int fuse_fsync(struct file *file, loff_t start, loff_t end,
+                      int datasync)
 {
-        return fuse_fsync_common(file, datasync, 0);
+        return fuse_fsync_common(file, start, end, datasync, 0);
 }
 
 void fuse_read_fill(struct fuse_req *req, struct file *file, loff_t pos,
@@ -1600,15 +1612,32 @@ static loff_t fuse_file_llseek(struct file *file, loff_t offset, int origin)
         struct inode *inode = file->f_path.dentry->d_inode;
 
         mutex_lock(&inode->i_mutex);
-        switch (origin) {
-        case SEEK_END:
+        if (origin != SEEK_CUR || origin != SEEK_SET) {
                 retval = fuse_update_attributes(inode, NULL, file, NULL);
                 if (retval)
                         goto exit;
+        }
+
+        switch (origin) {
+        case SEEK_END:
                 offset += i_size_read(inode);
                 break;
         case SEEK_CUR:
                 offset += file->f_pos;
+                break;
+        case SEEK_DATA:
+                if (offset >= i_size_read(inode)) {
+                        retval = -ENXIO;
+                        goto exit;
+                }
+                break;
+        case SEEK_HOLE:
+                if (offset >= i_size_read(inode)) {
+                        retval = -ENXIO;
+                        goto exit;
+                }
+                offset = i_size_read(inode);
+                break;
         }
         retval = -EINVAL;
         if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) {
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index b788becada76..c6aa2d4b8517 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -589,7 +589,8 @@ void fuse_release_common(struct file *file, int opcode);
 /**
  * Send FSYNC or FSYNCDIR request
  */
-int fuse_fsync_common(struct file *file, int datasync, int isdir);
+int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
+                      int datasync, int isdir);
 
 /**
  * Notify poll wakeup
diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 8f26d1a58912..70e90b4974ce 100644
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -190,9 +190,9 @@ generic_acl_chmod(struct inode *inode)
 }
 
 int
-generic_check_acl(struct inode *inode, int mask, unsigned int flags)
+generic_check_acl(struct inode *inode, int mask)
 {
-        if (flags & IPERM_FLAG_RCU) {
+        if (mask & MAY_NOT_BLOCK) {
                 if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
                         return -ECHILD;
         } else {
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index cbc07155b1a0..8ef1079f1665 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -75,12 +75,12 @@ static struct posix_acl *gfs2_acl_get(struct gfs2_inode *ip, int type)
  * Returns: errno
  */
 
-int gfs2_check_acl(struct inode *inode, int mask, unsigned int flags)
+int gfs2_check_acl(struct inode *inode, int mask)
 {
         struct posix_acl *acl;
         int error;
 
-        if (flags & IPERM_FLAG_RCU) {
+        if (mask & MAY_NOT_BLOCK) {
                 if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
                         return -ECHILD;
                 return -EAGAIN;
diff --git a/fs/gfs2/acl.h b/fs/gfs2/acl.h
index a93907c8159b..b522b0cb39ea 100644
--- a/fs/gfs2/acl.h
+++ b/fs/gfs2/acl.h
@@ -16,7 +16,7 @@
 #define GFS2_POSIX_ACL_DEFAULT          "posix_acl_default"
 #define GFS2_ACL_MAX_ENTRIES            25
 
-extern int gfs2_check_acl(struct inode *inode, int mask, unsigned int);
+extern int gfs2_check_acl(struct inode *inode, int mask);
 extern int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode);
 extern int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr);
 extern const struct xattr_handler gfs2_xattr_system_handler;
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 42e477f31223..7878c473ae62 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1216,6 +1216,8 @@ int gfs2_setattr_size(struct inode *inode, u64 newsize)
         if (ret)
                 return ret;
 
+        inode_dio_wait(inode);
+
         oldsize = inode->i_size;
         if (newsize >= oldsize)
                 return do_grow(inode, newsize);
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index bc2590ef5fc1..edeb9e802903 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -245,7 +245,7 @@ static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
             !capable(CAP_LINUX_IMMUTABLE))
                 goto out;
         if (!IS_IMMUTABLE(inode)) {
-                error = gfs2_permission(inode, MAY_WRITE, 0);
+                error = gfs2_permission(inode, MAY_WRITE);
                 if (error)
                         goto out;
         }
@@ -546,7 +546,9 @@ static int gfs2_close(struct inode *inode, struct file *file)
 
 /**
  * gfs2_fsync - sync the dirty data for a file (across the cluster)
- * @file: the file that points to the dentry (we ignore this)
+ * @file: the file that points to the dentry
+ * @start: the start position in the file to sync
+ * @end: the end position in the file to sync
  * @datasync: set if we can ignore timestamp changes
  *
  * The VFS will flush data for us. We only need to worry
@@ -555,23 +557,32 @@ static int gfs2_close(struct inode *inode, struct file *file)
  * Returns: errno
  */
 
-static int gfs2_fsync(struct file *file, int datasync)
+static int gfs2_fsync(struct file *file, loff_t start, loff_t end,
+                      int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         int sync_state = inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC);
         struct gfs2_inode *ip = GFS2_I(inode);
         int ret;
 
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+        mutex_lock(&inode->i_mutex);
+
         if (datasync)
                 sync_state &= ~I_DIRTY_SYNC;
 
         if (sync_state) {
                 ret = sync_inode_metadata(inode, 1);
-                if (ret)
+                if (ret) {
+                        mutex_unlock(&inode->i_mutex);
                         return ret;
+                }
                 gfs2_ail_flush(ip->i_gl);
         }
 
+        mutex_unlock(&inode->i_mutex);
         return 0;
 }
 
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 03e0c529063e..0fb51a96eff0 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -307,7 +307,7 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
         }
 
         if (!is_root) {
-                error = gfs2_permission(dir, MAY_EXEC, 0);
+                error = gfs2_permission(dir, MAY_EXEC);
                 if (error)
                         goto out;
         }
@@ -337,7 +337,7 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
 {
         int error;
 
-        error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, 0);
+        error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
         if (error)
                 return error;
 
@@ -792,13 +792,8 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry,
 static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
                                   struct nameidata *nd)
 {
-        struct inode *inode = NULL;
-
-        inode = gfs2_lookupi(dir, &dentry->d_name, 0);
-        if (inode && IS_ERR(inode))
-                return ERR_CAST(inode);
-
-        if (inode) {
+        struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0);
+        if (inode && !IS_ERR(inode)) {
                 struct gfs2_glock *gl = GFS2_I(inode)->i_gl;
                 struct gfs2_holder gh;
                 int error;
@@ -808,11 +803,8 @@ static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
                         return ERR_PTR(error);
                 }
                 gfs2_glock_dq_uninit(&gh);
-                return d_splice_alias(inode, dentry);
         }
-        d_add(dentry, inode);
-
-        return NULL;
+        return d_splice_alias(inode, dentry);
 }
 
 /**
@@ -857,7 +849,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
         if (inode->i_nlink == 0)
                 goto out_gunlock;
 
-        error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC, 0);
+        error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC);
         if (error)
                 goto out_gunlock;
 
@@ -990,7 +982,7 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
         if (IS_APPEND(&dip->i_inode))
                 return -EPERM;
 
-        error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, 0);
+        error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
         if (error)
                 return error;
 
@@ -1336,7 +1328,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
                         }
                 }
         } else {
-                error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC, 0);
+                error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC);
                 if (error)
                         goto out_gunlock;
 
@@ -1371,7 +1363,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
         /* Check out the dir to be renamed */
 
         if (dir_rename) {
-                error = gfs2_permission(odentry->d_inode, MAY_WRITE, 0);
+                error = gfs2_permission(odentry->d_inode, MAY_WRITE);
                 if (error)
                         goto out_gunlock;
         }
@@ -1543,7 +1535,7 @@ static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
  * Returns: errno
  */
 
-int gfs2_permission(struct inode *inode, int mask, unsigned int flags)
+int gfs2_permission(struct inode *inode, int mask)
 {
         struct gfs2_inode *ip;
         struct gfs2_holder i_gh;
@@ -1553,7 +1545,7 @@ int gfs2_permission(struct inode *inode, int mask, unsigned int flags)
 
         ip = GFS2_I(inode);
         if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
-                if (flags & IPERM_FLAG_RCU)
+                if (mask & MAY_NOT_BLOCK)
                         return -ECHILD;
                 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
                 if (error)
@@ -1564,7 +1556,7 @@ int gfs2_permission(struct inode *inode, int mask, unsigned int flags)
         if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
                 error = -EACCES;
         else
-                error = generic_permission(inode, mask, flags, gfs2_check_acl);
+                error = generic_permission(inode, mask);
         if (unlock)
                 gfs2_glock_dq_uninit(&i_gh);
 
@@ -1854,6 +1846,7 @@ const struct inode_operations gfs2_file_iops = {
         .listxattr = gfs2_listxattr,
         .removexattr = gfs2_removexattr,
         .fiemap = gfs2_fiemap,
+        .check_acl = gfs2_check_acl,
 };
 
 const struct inode_operations gfs2_dir_iops = {
@@ -1874,6 +1867,7 @@ const struct inode_operations gfs2_dir_iops = {
         .listxattr = gfs2_listxattr,
         .removexattr = gfs2_removexattr,
         .fiemap = gfs2_fiemap,
+        .check_acl = gfs2_check_acl,
 };
 
 const struct inode_operations gfs2_symlink_iops = {
@@ -1888,5 +1882,6 @@ const struct inode_operations gfs2_symlink_iops = {
         .listxattr = gfs2_listxattr,
         .removexattr = gfs2_removexattr,
         .fiemap = gfs2_fiemap,
+        .check_acl = gfs2_check_acl,
 };
 
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index 31606076f701..8d90e0c07672 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -108,7 +108,7 @@ extern int gfs2_inode_refresh(struct gfs2_inode *ip);
 
 extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
                                   int is_root);
-extern int gfs2_permission(struct inode *inode, int mask, unsigned int flags);
+extern int gfs2_permission(struct inode *inode, int mask);
 extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
 extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index fff16c968e67..96a1b625fc74 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -123,8 +123,8 @@ static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb,
         struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
-                                  offset, nr_segs, hfs_get_block, NULL);
+        ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                 hfs_get_block);
 
         /*
          * In case of error extending write may have instantiated a few
@@ -615,6 +615,8 @@ int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
 
         if ((attr->ia_valid & ATTR_SIZE) &&
             attr->ia_size != i_size_read(inode)) {
+                inode_dio_wait(inode);
+
                 error = vmtruncate(inode, attr->ia_size);
                 if (error)
                         return error;
@@ -625,12 +627,18 @@ int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
         return 0;
 }
 
-static int hfs_file_fsync(struct file *filp, int datasync)
+static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end,
+                          int datasync)
 {
         struct inode *inode = filp->f_mapping->host;
         struct super_block * sb;
         int ret, err;
 
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+        mutex_lock(&inode->i_mutex);
+
         /* sync the inode to buffers */
         ret = write_inode_now(inode, 0);
 
@@ -647,6 +655,7 @@ static int hfs_file_fsync(struct file *filp, int datasync)
         err = sync_blockdev(sb->s_bdev);
         if (!ret)
                 ret = err;
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
 
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index 81dfd1e495e3..d7674d051f52 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -404,7 +404,8 @@ int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
 int hfsplus_cat_write_inode(struct inode *);
 struct inode *hfsplus_new_inode(struct super_block *, int);
 void hfsplus_delete_inode(struct inode *);
-int hfsplus_file_fsync(struct file *file, int datasync);
+int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
+                       int datasync);
 
 /* ioctl.c */
 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 010cd363d085..4cc1e3a36ec7 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -119,8 +119,8 @@ static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
         struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host;
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
-                                  offset, nr_segs, hfsplus_get_block, NULL);
+        ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                 hfsplus_get_block);
 
         /*
          * In case of error extending write may have instantiated a few
@@ -298,6 +298,8 @@ static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
 
         if ((attr->ia_valid & ATTR_SIZE) &&
             attr->ia_size != i_size_read(inode)) {
+                inode_dio_wait(inode);
+
                 error = vmtruncate(inode, attr->ia_size);
                 if (error)
                         return error;
@@ -308,13 +310,19 @@ static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr)
         return 0;
 }
 
-int hfsplus_file_fsync(struct file *file, int datasync)
+int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
+                       int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
         struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
         int error = 0, error2;
 
+        error = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (error)
+                return error;
+        mutex_lock(&inode->i_mutex);
+
         /*
          * Sync inode metadata into the catalog and extent trees.
          */
@@ -342,6 +350,8 @@ int hfsplus_file_fsync(struct file *file, int datasync)
         if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 
+        mutex_unlock(&inode->i_mutex);
+
         return error;
 }
 
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 2638c834ed28..0d22afdd4611 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -362,9 +362,20 @@ retry:
         return 0;
 }
 
-int hostfs_fsync(struct file *file, int datasync)
+int hostfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
-        return fsync_file(HOSTFS_I(file->f_mapping->host)->fd, datasync);
+        struct inode *inode = file->f_mapping->host;
+        int ret;
+
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+
+        mutex_lock(&inode->i_mutex);
+        ret = fsync_file(HOSTFS_I(inode)->fd, datasync);
+        mutex_unlock(&inode->i_mutex);
+
+        return ret;
 }
 
 static const struct file_operations hostfs_file_fops = {
@@ -748,12 +759,12 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
         return err;
 }
 
-int hostfs_permission(struct inode *ino, int desired, unsigned int flags)
+int hostfs_permission(struct inode *ino, int desired)
 {
         char *name;
         int r = 0, w = 0, x = 0, err;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (desired & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         if (desired & MAY_READ) r = 1;
@@ -770,7 +781,7 @@ int hostfs_permission(struct inode *ino, int desired, unsigned int flags)
                 err = access_file(name, r, w, x);
         __putname(name);
         if (!err)
-                err = generic_permission(ino, desired, flags, NULL);
+                err = generic_permission(ino, desired);
         return err;
 }
 
diff --git a/fs/hpfs/dir.c b/fs/hpfs/dir.c
index f46ae025bfb5..96a8ed91cedd 100644
--- a/fs/hpfs/dir.c
+++ b/fs/hpfs/dir.c
@@ -29,6 +29,10 @@ static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence)
         struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
         struct super_block *s = i->i_sb;
 
+        /* Somebody else will have to figure out what to do here */
+        if (whence == SEEK_DATA || whence == SEEK_HOLE)
+                return -EINVAL;
+
         hpfs_lock(s);
 
         /*printk("dir lseek\n");*/
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index 89c500ee5213..89d2a5803ae3 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -18,9 +18,14 @@ static int hpfs_file_release(struct inode *inode, struct file *file)
         return 0;
 }
 
-int hpfs_file_fsync(struct file *file, int datasync)
+int hpfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = file->f_mapping->host;
+        int ret;
+
+        ret = filemap_write_and_wait_range(file->f_mapping, start, end);
+        if (ret)
+                return ret;
         return sync_blockdev(inode->i_sb->s_bdev);
 }
 
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index dd552f862c8f..331b5e234ef3 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -258,7 +258,7 @@ void hpfs_set_ea(struct inode *, struct fnode *, const char *,
 
 /* file.c */
 
-int hpfs_file_fsync(struct file *, int);
+int hpfs_file_fsync(struct file *, loff_t, loff_t, int);
 extern const struct file_operations hpfs_file_ops;
 extern const struct inode_operations hpfs_file_iops;
 extern const struct address_space_operations hpfs_aops;
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index acf95dab2aac..2df69e2f07cf 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -398,7 +398,7 @@ again:
                         hpfs_unlock(dir->i_sb);
                         return -ENOSPC;
                 }
-                if (generic_permission(inode, MAY_WRITE, 0, NULL) ||
+                if (generic_permission(inode, MAY_WRITE) ||
                     !S_ISREG(inode->i_mode) ||
                     get_write_access(inode)) {
                         d_rehash(dentry);
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 85c098a499f3..8635be5ffd97 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -573,9 +573,10 @@ static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
         return err;
 }
 
-static int hppfs_fsync(struct file *file, int datasync)
+static int hppfs_fsync(struct file *file, loff_t start, loff_t end,
+                       int datasync)
 {
-        return 0;
+        return filemap_write_and_wait_range(file->f_mapping, start, end);
 }
 
 static const struct file_operations hppfs_dir_fops = {
diff --git a/fs/inode.c b/fs/inode.c
index 43566d17d1b8..96c77b81167c 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -33,8 +33,8 @@
  *
  * inode->i_lock protects:
  *   inode->i_state, inode->i_hash, __iget()
- * inode_lru_lock protects:
- *   inode_lru, inode->i_lru
+ * inode->i_sb->s_inode_lru_lock protects:
+ *   inode->i_sb->s_inode_lru, inode->i_lru
  * inode_sb_list_lock protects:
  *   sb->s_inodes, inode->i_sb_list
  * inode_wb_list_lock protects:
@@ -46,7 +46,7 @@
  *
  * inode_sb_list_lock
  *   inode->i_lock
- *     inode_lru_lock
+ *     inode->i_sb->s_inode_lru_lock
  *
  * inode_wb_list_lock
  *   inode->i_lock
@@ -64,24 +64,10 @@ static unsigned int i_hash_shift __read_mostly;
 static struct hlist_head *inode_hashtable __read_mostly;
 static __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_hash_lock);
 
-static LIST_HEAD(inode_lru);
-static DEFINE_SPINLOCK(inode_lru_lock);
-
 __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_sb_list_lock);
 __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_wb_list_lock);
 
 /*
- * iprune_sem provides exclusion between the icache shrinking and the
- * umount path.
- *
- * We don't actually need it to protect anything in the umount path,
- * but only need to cycle through it to make sure any inode that
- * prune_icache took off the LRU list has been fully torn down by the
- * time we are past evict_inodes.
- */
-static DECLARE_RWSEM(iprune_sem);
-
-/*
  * Empty aops. Can be used for the cases where the user does not
  * define any of the address_space operations.
  */
@@ -95,6 +81,7 @@ EXPORT_SYMBOL(empty_aops);
 struct inodes_stat_t inodes_stat;
 
 static DEFINE_PER_CPU(unsigned int, nr_inodes);
+static DEFINE_PER_CPU(unsigned int, nr_unused);
 
 static struct kmem_cache *inode_cachep __read_mostly;
 
@@ -109,7 +96,11 @@ static int get_nr_inodes(void)
 
 static inline int get_nr_inodes_unused(void)
 {
-        return inodes_stat.nr_unused;
+        int i;
+        int sum = 0;
+        for_each_possible_cpu(i)
+                sum += per_cpu(nr_unused, i);
+        return sum < 0 ? 0 : sum;
 }
 
 int get_nr_dirty_inodes(void)
@@ -127,6 +118,7 @@ int proc_nr_inodes(ctl_table *table, int write,
                    void __user *buffer, size_t *lenp, loff_t *ppos)
 {
         inodes_stat.nr_inodes = get_nr_inodes();
+        inodes_stat.nr_unused = get_nr_inodes_unused();
         return proc_dointvec(table, write, buffer, lenp, ppos);
 }
 #endif
@@ -176,8 +168,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
         mutex_init(&inode->i_mutex);
         lockdep_set_class(&inode->i_mutex, &sb->s_type->i_mutex_key);
 
-        init_rwsem(&inode->i_alloc_sem);
-        lockdep_set_class(&inode->i_alloc_sem, &sb->s_type->i_alloc_sem_key);
+        atomic_set(&inode->i_dio_count, 0);
 
         mapping->a_ops = &empty_aops;
         mapping->host = inode;
@@ -337,22 +328,24 @@ EXPORT_SYMBOL(ihold);
 
 static void inode_lru_list_add(struct inode *inode)
 {
-        spin_lock(&inode_lru_lock);
+        spin_lock(&inode->i_sb->s_inode_lru_lock);
         if (list_empty(&inode->i_lru)) {
-                list_add(&inode->i_lru, &inode_lru);
-                inodes_stat.nr_unused++;
+                list_add(&inode->i_lru, &inode->i_sb->s_inode_lru);
+                inode->i_sb->s_nr_inodes_unused++;
+                this_cpu_inc(nr_unused);
         }
-        spin_unlock(&inode_lru_lock);
+        spin_unlock(&inode->i_sb->s_inode_lru_lock);
 }
 
 static void inode_lru_list_del(struct inode *inode)
 {
-        spin_lock(&inode_lru_lock);
+        spin_lock(&inode->i_sb->s_inode_lru_lock);
         if (!list_empty(&inode->i_lru)) {
                 list_del_init(&inode->i_lru);
-                inodes_stat.nr_unused--;
+                inode->i_sb->s_nr_inodes_unused--;
+                this_cpu_dec(nr_unused);
         }
-        spin_unlock(&inode_lru_lock);
+        spin_unlock(&inode->i_sb->s_inode_lru_lock);
 }
 
 /**
@@ -537,14 +530,6 @@ void evict_inodes(struct super_block *sb)
         spin_unlock(&inode_sb_list_lock);
 
         dispose_list(&dispose);
-
-        /*
-         * Cycle through iprune_sem to make sure any inode that prune_icache
-         * moved off the list before we took the lock has been fully torn
-         * down.
-         */
-        down_write(&iprune_sem);
-        up_write(&iprune_sem);
 }
 
 /**
@@ -607,8 +592,10 @@ static int can_unuse(struct inode *inode)
 }
 
 /*
- * Scan `goal' inodes on the unused list for freeable ones. They are moved to a
- * temporary list and then are freed outside inode_lru_lock by dispose_list().
+ * Walk the superblock inode LRU for freeable inodes and attempt to free them.
+ * This is called from the superblock shrinker function with a number of inodes
+ * to trim from the LRU. Inodes to be freed are moved to a temporary list and
+ * then are freed outside inode_lock by dispose_list().
  *
  * Any inodes which are pinned purely because of attached pagecache have their
  * pagecache removed.  If the inode has metadata buffers attached to
@@ -622,29 +609,28 @@ static int can_unuse(struct inode *inode)
  * LRU does not have strict ordering. Hence we don't want to reclaim inodes
  * with this flag set because they are the inodes that are out of order.
  */
-static void prune_icache(int nr_to_scan)
+void prune_icache_sb(struct super_block *sb, int nr_to_scan)
 {
         LIST_HEAD(freeable);
         int nr_scanned;
         unsigned long reap = 0;
 
-        down_read(&iprune_sem);
-        spin_lock(&inode_lru_lock);
-        for (nr_scanned = 0; nr_scanned < nr_to_scan; nr_scanned++) {
+        spin_lock(&sb->s_inode_lru_lock);
+        for (nr_scanned = nr_to_scan; nr_scanned >= 0; nr_scanned--) {
                 struct inode *inode;
 
-                if (list_empty(&inode_lru))
+                if (list_empty(&sb->s_inode_lru))
                         break;
 
-                inode = list_entry(inode_lru.prev, struct inode, i_lru);
+                inode = list_entry(sb->s_inode_lru.prev, struct inode, i_lru);
 
                 /*
-                 * we are inverting the inode_lru_lock/inode->i_lock here,
+                 * we are inverting the sb->s_inode_lru_lock/inode->i_lock here,
                  * so use a trylock. If we fail to get the lock, just move the
                  * inode to the back of the list so we don't spin on it.
                  */
                 if (!spin_trylock(&inode->i_lock)) {
-                        list_move(&inode->i_lru, &inode_lru);
+                        list_move(&inode->i_lru, &sb->s_inode_lru);
                         continue;
                 }
 
@@ -656,28 +642,29 @@ static void prune_icache(int nr_to_scan)
                     (inode->i_state & ~I_REFERENCED)) {
                         list_del_init(&inode->i_lru);
                         spin_unlock(&inode->i_lock);
-                        inodes_stat.nr_unused--;
+                        sb->s_nr_inodes_unused--;
+                        this_cpu_dec(nr_unused);
                         continue;
                 }
 
                 /* recently referenced inodes get one more pass */
                 if (inode->i_state & I_REFERENCED) {
                         inode->i_state &= ~I_REFERENCED;
-                        list_move(&inode->i_lru, &inode_lru);
+                        list_move(&inode->i_lru, &sb->s_inode_lru);
                         spin_unlock(&inode->i_lock);
                         continue;
                 }
                 if (inode_has_buffers(inode) || inode->i_data.nrpages) {
                         __iget(inode);
                         spin_unlock(&inode->i_lock);
-                        spin_unlock(&inode_lru_lock);
+                        spin_unlock(&sb->s_inode_lru_lock);
                         if (remove_inode_buffers(inode))
                                 reap += invalidate_mapping_pages(&inode->i_data,
                                                                 0, -1);
                         iput(inode);
-                        spin_lock(&inode_lru_lock);
+                        spin_lock(&sb->s_inode_lru_lock);
 
-                        if (inode != list_entry(inode_lru.next,
+                        if (inode != list_entry(sb->s_inode_lru.next,
                                                 struct inode, i_lru))
                                 continue;       /* wrong inode or list_empty */
                         /* avoid lock inversions with trylock */
@@ -693,51 +680,18 @@ static void prune_icache(int nr_to_scan)
                 spin_unlock(&inode->i_lock);
 
                 list_move(&inode->i_lru, &freeable);
-                inodes_stat.nr_unused--;
+                sb->s_nr_inodes_unused--;
+                this_cpu_dec(nr_unused);
         }
         if (current_is_kswapd())
                 __count_vm_events(KSWAPD_INODESTEAL, reap);
         else
                 __count_vm_events(PGINODESTEAL, reap);
-        spin_unlock(&inode_lru_lock);
+        spin_unlock(&sb->s_inode_lru_lock);
 
         dispose_list(&freeable);
-        up_read(&iprune_sem);
 }
 
-/*
- * shrink_icache_memory() will attempt to reclaim some unused inodes.  Here,
- * "unused" means that no dentries are referring to the inodes: the files are
- * not open and the dcache references to those inodes have already been
- * reclaimed.
- *
- * This function is passed the number of inodes to scan, and it returns the
- * total number of remaining possibly-reclaimable inodes.
- */
-static int shrink_icache_memory(struct shrinker *shrink,
-                                struct shrink_control *sc)
-{
-        int nr = sc->nr_to_scan;
-        gfp_t gfp_mask = sc->gfp_mask;
-
-        if (nr) {
-                /*
-                 * Nasty deadlock avoidance.  We may hold various FS locks,
-                 * and we don't want to recurse into the FS that called us
-                 * in clear_inode() and friends..
-                 */
-                if (!(gfp_mask & __GFP_FS))
-                        return -1;
-                prune_icache(nr);
-        }
-        return (get_nr_inodes_unused() / 100) * sysctl_vfs_cache_pressure;
-}
-
-static struct shrinker icache_shrinker = {
-        .shrink = shrink_icache_memory,
-        .seeks = DEFAULT_SEEKS,
-};
-
 static void __wait_on_freeing_inode(struct inode *inode);
 /*
  * Called with the inode lock held.
@@ -1331,7 +1285,7 @@ static void iput_final(struct inode *inode)
 
         WARN_ON(inode->i_state & I_NEW);
 
-        if (op && op->drop_inode)
+        if (op->drop_inode)
                 drop = op->drop_inode(inode);
         else
                 drop = generic_drop_inode(inode);
@@ -1617,7 +1571,6 @@ void __init inode_init(void)
                                          (SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|
                                          SLAB_MEM_SPREAD),
                                          init_once);
-        register_shrinker(&icache_shrinker);
 
         /* Hash may have been set up in inode_init_early */
         if (!hashdist)
diff --git a/fs/internal.h b/fs/internal.h
index b29c46e4e32f..fe327c20af83 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -97,6 +97,7 @@ extern struct file *get_empty_filp(void);
  * super.c
  */
 extern int do_remount_sb(struct super_block *, int, void *, int);
+extern bool grab_super_passive(struct super_block *sb);
 extern void __put_super(struct super_block *sb);
 extern void put_super(struct super_block *sb);
 extern struct dentry *mount_fs(struct file_system_type *,
@@ -135,3 +136,8 @@ extern void inode_wb_list_del(struct inode *inode);
 extern int get_nr_dirty_inodes(void);
 extern void evict_inodes(struct super_block *);
 extern int invalidate_inodes(struct super_block *, bool);
+
+/*
+ * dcache.c
+ */
+extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c
index 0542b6eedf80..f20437c068a0 100644
--- a/fs/isofs/dir.c
+++ b/fs/isofs/dir.c
@@ -254,19 +254,16 @@ static int isofs_readdir(struct file *filp,
         char *tmpname;
         struct iso_directory_record *tmpde;
         struct inode *inode = filp->f_path.dentry->d_inode;
-        struct isofs_sb_info *sbi = ISOFS_SB(inode->i_sb);
 
         tmpname = (char *)__get_free_page(GFP_KERNEL);
         if (tmpname == NULL)
                 return -ENOMEM;
 
-        mutex_lock(&sbi->s_mutex);
         tmpde = (struct iso_directory_record *) (tmpname+1024);
 
         result = do_isofs_readdir(inode, filp, dirent, filldir, tmpname, tmpde);
 
         free_page((unsigned long) tmpname);
-        mutex_unlock(&sbi->s_mutex);
         return result;
 }
 
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index b3cc8586984e..a5d03672d04e 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -863,7 +863,6 @@ root_found:
         sbi->s_utf8 = opt.utf8;
         sbi->s_nocompress = opt.nocompress;
         sbi->s_overriderockperm = opt.overriderockperm;
-        mutex_init(&sbi->s_mutex);
         /*
          * It would be incredibly stupid to allow people to mark every file
          * on the disk as suid, so we merely allow them to set the default
diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index 2882dc089f87..7d33de84f52a 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -55,7 +55,6 @@ struct isofs_sb_info {
         gid_t s_gid;
         uid_t s_uid;
         struct nls_table *s_nls_iocharset; /* Native language support table */
-        struct mutex s_mutex; /* replaces BKL, please remove if possible */
 };
 
 #define ISOFS_INVALID_MODE ((mode_t) -1)
diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
index 4fb3e8074fd4..1e2946f2a69e 100644
--- a/fs/isofs/namei.c
+++ b/fs/isofs/namei.c
@@ -168,7 +168,6 @@ struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nam
         int found;
         unsigned long uninitialized_var(block);
         unsigned long uninitialized_var(offset);
-        struct isofs_sb_info *sbi = ISOFS_SB(dir->i_sb);
         struct inode *inode;
         struct page *page;
 
@@ -176,21 +175,13 @@ struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nam
         if (!page)
                 return ERR_PTR(-ENOMEM);
 
-        mutex_lock(&sbi->s_mutex);
         found = isofs_find_entry(dir, dentry,
                                 &block, &offset,
                                 page_address(page),
                                 1024 + page_address(page));
         __free_page(page);
 
-        inode = NULL;
-        if (found) {
-                inode = isofs_iget(dir->i_sb, block, offset);
-                if (IS_ERR(inode)) {
-                        mutex_unlock(&sbi->s_mutex);
-                        return ERR_CAST(inode);
-                }
-        }
-        mutex_unlock(&sbi->s_mutex);
+        inode = found ? isofs_iget(dir->i_sb, block, offset) : NULL;
+
         return d_splice_alias(inode, dentry);
 }
diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c
index f9cd04db6eab..1fbc7de88f50 100644
--- a/fs/isofs/rock.c
+++ b/fs/isofs/rock.c
@@ -678,7 +678,6 @@ static int rock_ridge_symlink_readpage(struct file *file, struct page *page)
 
         init_rock_state(&rs, inode);
         block = ei->i_iget5_block;
-        mutex_lock(&sbi->s_mutex);
         bh = sb_bread(inode->i_sb, block);
         if (!bh)
                 goto out_noread;
@@ -748,7 +747,6 @@ repeat:
                 goto fail;
         brelse(bh);
         *rpnt = '\0';
-        mutex_unlock(&sbi->s_mutex);
         SetPageUptodate(page);
         kunmap(page);
         unlock_page(page);
@@ -765,7 +763,6 @@ out_bad_span:
         printk("symlink spans iso9660 blocks\n");
 fail:
         brelse(bh);
-        mutex_unlock(&sbi->s_mutex);
 error:
         SetPageError(page);
         kunmap(page);
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index 828a0e1ea438..3675b3cdee89 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -259,12 +259,12 @@ static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
         return rc;
 }
 
-int jffs2_check_acl(struct inode *inode, int mask, unsigned int flags)
+int jffs2_check_acl(struct inode *inode, int mask)
 {
         struct posix_acl *acl;
         int rc;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS);
diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h
index 3119f59253d3..5e42de8d9541 100644
--- a/fs/jffs2/acl.h
+++ b/fs/jffs2/acl.h
@@ -26,7 +26,7 @@ struct jffs2_acl_header {
 
 #ifdef CONFIG_JFFS2_FS_POSIX_ACL
 
-extern int jffs2_check_acl(struct inode *, int, unsigned int);
+extern int jffs2_check_acl(struct inode *, int);
 extern int jffs2_acl_chmod(struct inode *);
 extern int jffs2_init_acl_pre(struct inode *, struct inode *, int *);
 extern int jffs2_init_acl_post(struct inode *);
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 4bca6a2e5c07..5f243cd63afc 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -102,10 +102,8 @@ static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
         mutex_unlock(&dir_f->sem);
         if (ino) {
                 inode = jffs2_iget(dir_i->i_sb, ino);
-                if (IS_ERR(inode)) {
+                if (IS_ERR(inode))
                         printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
-                        return ERR_CAST(inode);
-                }
         }
 
         return d_splice_alias(inode, target);
@@ -822,7 +820,10 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
 
         if (victim_f) {
                 /* There was a victim. Kill it off nicely */
-                drop_nlink(new_dentry->d_inode);
+                if (S_ISDIR(new_dentry->d_inode->i_mode))
+                        clear_nlink(new_dentry->d_inode);
+                else
+                        drop_nlink(new_dentry->d_inode);
                 /* Don't oops if the victim was a dirent pointing to an
                    inode which didn't exist. */
                 if (victim_f->inocache) {
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 1c0a08d711aa..3989f7e09f7f 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -27,13 +27,20 @@ static int jffs2_write_begin(struct file *filp, struct address_space *mapping,
                         struct page **pagep, void **fsdata);
 static int jffs2_readpage (struct file *filp, struct page *pg);
 
-int jffs2_fsync(struct file *filp, int datasync)
+int jffs2_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = filp->f_mapping->host;
         struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);
+        int ret;
+
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
 
+        mutex_lock(&inode->i_mutex);
         /* Trigger GC to flush any pending writes for this inode */
         jffs2_flush_wbuf_gc(c, inode->i_ino);
+        mutex_unlock(&inode->i_mutex);
 
         return 0;
 }
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index 65c6c43ca482..9c252835e8e5 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -158,7 +158,7 @@ extern const struct inode_operations jffs2_dir_inode_operations;
 extern const struct file_operations jffs2_file_operations;
 extern const struct inode_operations jffs2_file_inode_operations;
 extern const struct address_space_operations jffs2_file_address_operations;
-int jffs2_fsync(struct file *, int);
+int jffs2_fsync(struct file *, loff_t, loff_t, int);
 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 
 /* ioctl.c */
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index e5de9422fa32..8a0a0666d5a6 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -114,11 +114,11 @@ out:
         return rc;
 }
 
-int jfs_check_acl(struct inode *inode, int mask, unsigned int flags)
+int jfs_check_acl(struct inode *inode, int mask)
 {
         struct posix_acl *acl;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         acl = jfs_get_acl(inode, ACL_TYPE_ACCESS);
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 2f3f531f3606..7527855b5cc6 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -28,19 +28,26 @@
 #include "jfs_acl.h"
 #include "jfs_debug.h"
 
-int jfs_fsync(struct file *file, int datasync)
+int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         int rc = 0;
 
+        rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (rc)
+                return rc;
+
+        mutex_lock(&inode->i_mutex);
         if (!(inode->i_state & I_DIRTY) ||
             (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
                 /* Make sure committed changes hit the disk */
                 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
+                mutex_unlock(&inode->i_mutex);
                 return rc;
         }
 
         rc |= jfs_commit_inode(inode, 1);
+        mutex_unlock(&inode->i_mutex);
 
         return rc ? -EIO : 0;
 }
@@ -110,6 +117,8 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
 
         if ((iattr->ia_valid & ATTR_SIZE) &&
             iattr->ia_size != i_size_read(inode)) {
+                inode_dio_wait(inode);
+
                 rc = vmtruncate(inode, iattr->ia_size);
                 if (rc)
                         return rc;
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 109655904bbc..77b69b27f825 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -329,8 +329,8 @@ static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
         struct inode *inode = file->f_mapping->host;
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
-                                offset, nr_segs, jfs_get_block, NULL);
+        ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                 jfs_get_block);
 
         /*
          * In case of error extending write may have instantiated a few
diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h
index f9285c4900fa..54e07559878d 100644
--- a/fs/jfs/jfs_acl.h
+++ b/fs/jfs/jfs_acl.h
@@ -20,7 +20,7 @@
 
 #ifdef CONFIG_JFS_POSIX_ACL
 
-int jfs_check_acl(struct inode *, int, unsigned int flags);
+int jfs_check_acl(struct inode *, int);
 int jfs_init_acl(tid_t, struct inode *, struct inode *);
 int jfs_acl_chmod(struct inode *inode);
 
diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h
index ec2fb8b945fc..9271cfe4a149 100644
--- a/fs/jfs/jfs_inode.h
+++ b/fs/jfs/jfs_inode.h
@@ -21,7 +21,7 @@
 struct fid;
 
 extern struct inode *ialloc(struct inode *, umode_t);
-extern int jfs_fsync(struct file *, int);
+extern int jfs_fsync(struct file *, loff_t, loff_t, int);
 extern long jfs_ioctl(struct file *, unsigned int, unsigned long);
 extern long jfs_compat_ioctl(struct file *, unsigned int, unsigned long);
 extern struct inode *jfs_iget(struct super_block *, unsigned long);
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index eaaf2b511e89..03787ef6a118 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1456,34 +1456,23 @@ static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struc
         ino_t inum;
         struct inode *ip;
         struct component_name key;
-        const char *name = dentry->d_name.name;
-        int len = dentry->d_name.len;
         int rc;
 
-        jfs_info("jfs_lookup: name = %s", name);
-
-        if ((name[0] == '.') && (len == 1))
-                inum = dip->i_ino;
-        else if (strcmp(name, "..") == 0)
-                inum = PARENT(dip);
-        else {
-                if ((rc = get_UCSname(&key, dentry)))
-                        return ERR_PTR(rc);
-                rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
-                free_UCSname(&key);
-                if (rc == -ENOENT) {
-                        d_add(dentry, NULL);
-                        return NULL;
-                } else if (rc) {
-                        jfs_err("jfs_lookup: dtSearch returned %d", rc);
-                        return ERR_PTR(rc);
-                }
-        }
-
-        ip = jfs_iget(dip->i_sb, inum);
-        if (IS_ERR(ip)) {
-                jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum);
-                return ERR_CAST(ip);
+        jfs_info("jfs_lookup: name = %s", dentry->d_name.name);
+
+        if ((rc = get_UCSname(&key, dentry)))
+                return ERR_PTR(rc);
+        rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
+        free_UCSname(&key);
+        if (rc == -ENOENT) {
+                ip = NULL;
+        } else if (rc) {
+                jfs_err("jfs_lookup: dtSearch returned %d", rc);
+                ip = ERR_PTR(rc);
+        } else {
+                ip = jfs_iget(dip->i_sb, inum);
+                if (IS_ERR(ip))
+                        jfs_err("jfs_lookup: iget failed on inum %d", (uint)inum);
         }
 
         return d_splice_alias(ip, dentry);
@@ -1597,8 +1586,6 @@ out:
 
 static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
-        if (nd && nd->flags & LOOKUP_RCU)
-                return -ECHILD;
         /*
          * This is not negative dentry. Always valid.
          *
@@ -1624,10 +1611,8 @@ 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_CONTINUE | LOOKUP_PARENT))) {
-                if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
-                        return 0;
-        }
+        if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
+                return 0;
         return 1;
 }
 
diff --git a/fs/libfs.c b/fs/libfs.c
index 275ca4749a2e..c18e9a1235b6 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -16,6 +16,8 @@
 
 #include <asm/uaccess.h>
 
+#include "internal.h"
+
 static inline int simple_positive(struct dentry *dentry)
 {
         return dentry->d_inode && !d_unhashed(dentry);
@@ -246,13 +248,11 @@ struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name,
         root->i_ino = 1;
         root->i_mode = S_IFDIR | S_IRUSR | S_IWUSR;
         root->i_atime = root->i_mtime = root->i_ctime = CURRENT_TIME;
-        dentry = d_alloc(NULL, &d_name);
+        dentry = __d_alloc(s, &d_name);
         if (!dentry) {
                 iput(root);
                 goto Enomem;
         }
-        dentry->d_sb = s;
-        dentry->d_parent = dentry;
         d_instantiate(dentry, root);
         s->s_root = dentry;
         s->s_d_op = dops;
@@ -328,8 +328,10 @@ int simple_rename(struct inode *old_dir, struct dentry *old_dentry,
 
         if (new_dentry->d_inode) {
                 simple_unlink(new_dir, new_dentry);
-                if (they_are_dirs)
+                if (they_are_dirs) {
+                        drop_nlink(new_dentry->d_inode);
                         drop_nlink(old_dir);
+                }
         } else if (they_are_dirs) {
                 drop_nlink(old_dir);
                 inc_nlink(new_dir);
@@ -905,21 +907,29 @@ EXPORT_SYMBOL_GPL(generic_fh_to_parent);
  * filesystems which track all non-inode metadata in the buffers list
  * hanging off the address_space structure.
  */
-int generic_file_fsync(struct file *file, int datasync)
+int generic_file_fsync(struct file *file, loff_t start, loff_t end,
+                       int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         int err;
         int ret;
 
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+
+        mutex_lock(&inode->i_mutex);
         ret = sync_mapping_buffers(inode->i_mapping);
         if (!(inode->i_state & I_DIRTY))
-                return ret;
+                goto out;
         if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
-                return ret;
+                goto out;
 
         err = sync_inode_metadata(inode, 1);
         if (ret == 0)
                 ret = err;
+out:
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
 EXPORT_SYMBOL(generic_file_fsync);
@@ -956,7 +966,7 @@ EXPORT_SYMBOL(generic_check_addressable);
 /*
  * No-op implementation of ->fsync for in-memory filesystems.
  */
-int noop_fsync(struct file *file, int datasync)
+int noop_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         return 0;
 }
diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index 1afae26cf236..b3ff3d894165 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -371,11 +371,9 @@ static struct dentry *logfs_lookup(struct inode *dir, struct dentry *dentry,
         page_cache_release(page);
 
         inode = logfs_iget(dir->i_sb, ino);
-        if (IS_ERR(inode)) {
+        if (IS_ERR(inode))
                 printk(KERN_ERR"LogFS: Cannot read inode #%llx for dentry (%lx, %lx)n",
                                 ino, dir->i_ino, index);
-                return ERR_CAST(inode);
-        }
         return d_splice_alias(inode, dentry);
 }
 
diff --git a/fs/logfs/file.c b/fs/logfs/file.c
index c2ad7028def4..b548c87a86f1 100644
--- a/fs/logfs/file.c
+++ b/fs/logfs/file.c
@@ -219,11 +219,20 @@ long logfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
         }
 }
 
-int logfs_fsync(struct file *file, int datasync)
+int logfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct super_block *sb = file->f_mapping->host->i_sb;
+        struct inode *inode = file->f_mapping->host;
+        int ret;
+
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
 
+        mutex_lock(&inode->i_mutex);
         logfs_write_anchor(sb);
+        mutex_unlock(&inode->i_mutex);
+
         return 0;
 }
 
diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
index 57afd4a6fabb..f22d108bfa5d 100644
--- a/fs/logfs/logfs.h
+++ b/fs/logfs/logfs.h
@@ -506,7 +506,7 @@ extern const struct file_operations logfs_reg_fops;
 extern const struct address_space_operations logfs_reg_aops;
 int logfs_readpage(struct file *file, struct page *page);
 long logfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-int logfs_fsync(struct file *file, int datasync);
+int logfs_fsync(struct file *file, loff_t start, loff_t end, int datasync);
 
 /* gc.c */
 u32 get_best_cand(struct super_block *sb, struct candidate_list *list, u32 *ec);
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index adcdc0a4e182..e7d23e25bf1d 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -596,8 +596,7 @@ static int minix_write_inode(struct inode *inode, struct writeback_control *wbc)
 
 int minix_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
 {
-        struct inode *dir = dentry->d_parent->d_inode;
-        struct super_block *sb = dir->i_sb;
+        struct super_block *sb = dentry->d_sb;
         generic_fillattr(dentry->d_inode, stat);
         if (INODE_VERSION(dentry->d_inode) == MINIX_V1)
                 stat->blocks = (BLOCK_SIZE / 512) * V1_minix_blocks(stat->size, sb);
diff --git a/fs/namei.c b/fs/namei.c
index 14ab8d3f2f0c..b7fad009bbf6 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -176,12 +176,12 @@ EXPORT_SYMBOL(putname);
 /*
  * This does basic POSIX ACL permission checking
  */
-static int acl_permission_check(struct inode *inode, int mask, unsigned int flags,
-                int (*check_acl)(struct inode *inode, int mask, unsigned int flags))
+static int acl_permission_check(struct inode *inode, int mask)
 {
+        int (*check_acl)(struct inode *inode, int mask);
         unsigned int mode = inode->i_mode;
 
-        mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
+        mask &= MAY_READ | MAY_WRITE | MAY_EXEC | MAY_NOT_BLOCK;
 
         if (current_user_ns() != inode_userns(inode))
                 goto other_perms;
@@ -189,8 +189,9 @@ static int acl_permission_check(struct inode *inode, int mask, unsigned int flag
         if (current_fsuid() == inode->i_uid)
                 mode >>= 6;
         else {
+                check_acl = inode->i_op->check_acl;
                 if (IS_POSIXACL(inode) && (mode & S_IRWXG) && check_acl) {
-                        int error = check_acl(inode, mask, flags);
+                        int error = check_acl(inode, mask);
                         if (error != -EAGAIN)
                                 return error;
                 }
@@ -203,7 +204,7 @@ other_perms:
         /*
          * If the DACs are ok we don't need any capability check.
          */
-        if ((mask & ~mode) == 0)
+        if ((mask & ~mode & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
                 return 0;
         return -EACCES;
 }
@@ -212,8 +213,6 @@ other_perms:
  * generic_permission -  check for access rights on a Posix-like filesystem
  * @inode:      inode to check access rights for
  * @mask:       right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC)
- * @check_acl:  optional callback to check for Posix ACLs
- * @flags:      IPERM_FLAG_ flags.
  *
  * Used to check for read/write/execute permissions on a file.
  * We use "fsuid" for this, letting us set arbitrary permissions
@@ -224,24 +223,32 @@ other_perms:
  * request cannot be satisfied (eg. requires blocking or too much complexity).
  * It would then be called again in ref-walk mode.
  */
-int generic_permission(struct inode *inode, int mask, unsigned int flags,
-        int (*check_acl)(struct inode *inode, int mask, unsigned int flags))
+int generic_permission(struct inode *inode, int mask)
 {
         int ret;
 
         /*
          * Do the basic POSIX ACL permission checks.
          */
-        ret = acl_permission_check(inode, mask, flags, check_acl);
+        ret = acl_permission_check(inode, mask);
         if (ret != -EACCES)
                 return ret;
 
+        if (S_ISDIR(inode->i_mode)) {
+                /* DACs are overridable for directories */
+                if (ns_capable(inode_userns(inode), CAP_DAC_OVERRIDE))
+                        return 0;
+                if (!(mask & MAY_WRITE))
+                        if (ns_capable(inode_userns(inode), CAP_DAC_READ_SEARCH))
+                                return 0;
+                return -EACCES;
+        }
         /*
          * Read/write DACs are always overridable.
-         * Executable DACs are overridable for all directories and
-         * for non-directories that have least one exec bit set.
+         * Executable DACs are overridable when there is
+         * at least one exec bit set.
          */
-        if (!(mask & MAY_EXEC) || execute_ok(inode))
+        if (!(mask & MAY_EXEC) || (inode->i_mode & S_IXUGO))
                 if (ns_capable(inode_userns(inode), CAP_DAC_OVERRIDE))
                         return 0;
 
@@ -249,7 +256,7 @@ int generic_permission(struct inode *inode, int mask, unsigned int flags,
          * Searching includes executable on directories, else just read.
          */
         mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
-        if (mask == MAY_READ || (S_ISDIR(inode->i_mode) && !(mask & MAY_WRITE)))
+        if (mask == MAY_READ)
                 if (ns_capable(inode_userns(inode), CAP_DAC_READ_SEARCH))
                         return 0;
 
@@ -288,10 +295,9 @@ int inode_permission(struct inode *inode, int mask)
         }
 
         if (inode->i_op->permission)
-                retval = inode->i_op->permission(inode, mask, 0);
+                retval = inode->i_op->permission(inode, mask);
         else
-                retval = generic_permission(inode, mask, 0,
-                                inode->i_op->check_acl);
+                retval = generic_permission(inode, mask);
 
         if (retval)
                 return retval;
@@ -304,69 +310,6 @@ int inode_permission(struct inode *inode, int mask)
 }
 
 /**
- * file_permission  -  check for additional access rights to a given file
- * @file:       file to check access rights for
- * @mask:       right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC)
- *
- * Used to check for read/write/execute permissions on an already opened
- * file.
- *
- * Note:
- *      Do not use this function in new code.  All access checks should
- *      be done using inode_permission().
- */
-int file_permission(struct file *file, int mask)
-{
-        return inode_permission(file->f_path.dentry->d_inode, mask);
-}
-
-/*
- * get_write_access() gets write permission for a file.
- * put_write_access() releases this write permission.
- * This is used for regular files.
- * We cannot support write (and maybe mmap read-write shared) accesses and
- * MAP_DENYWRITE mmappings simultaneously. The i_writecount field of an inode
- * can have the following values:
- * 0: no writers, no VM_DENYWRITE mappings
- * < 0: (-i_writecount) vm_area_structs with VM_DENYWRITE set exist
- * > 0: (i_writecount) users are writing to the file.
- *
- * Normally we operate on that counter with atomic_{inc,dec} and it's safe
- * except for the cases where we don't hold i_writecount yet. Then we need to
- * use {get,deny}_write_access() - these functions check the sign and refuse
- * to do the change if sign is wrong. Exclusion between them is provided by
- * the inode->i_lock spinlock.
- */
-
-int get_write_access(struct inode * inode)
-{
-        spin_lock(&inode->i_lock);
-        if (atomic_read(&inode->i_writecount) < 0) {
-                spin_unlock(&inode->i_lock);
-                return -ETXTBSY;
-        }
-        atomic_inc(&inode->i_writecount);
-        spin_unlock(&inode->i_lock);
-
-        return 0;
-}
-
-int deny_write_access(struct file * file)
-{
-        struct inode *inode = file->f_path.dentry->d_inode;
-
-        spin_lock(&inode->i_lock);
-        if (atomic_read(&inode->i_writecount) > 0) {
-                spin_unlock(&inode->i_lock);
-                return -ETXTBSY;
-        }
-        atomic_dec(&inode->i_writecount);
-        spin_unlock(&inode->i_lock);
-
-        return 0;
-}
-
-/**
  * path_get - get a reference to a path
  * @path: path to get the reference to
  *
@@ -492,28 +435,6 @@ static inline int d_revalidate(struct dentry *dentry, struct nameidata *nd)
         return dentry->d_op->d_revalidate(dentry, nd);
 }
 
-static struct dentry *
-do_revalidate(struct dentry *dentry, struct nameidata *nd)
-{
-        int status = d_revalidate(dentry, nd);
-        if (unlikely(status <= 0)) {
-                /*
-                 * The dentry failed validation.
-                 * If d_revalidate returned 0 attempt to invalidate
-                 * the dentry otherwise d_revalidate is asking us
-                 * to return a fail status.
-                 */
-                if (status < 0) {
-                        dput(dentry);
-                        dentry = ERR_PTR(status);
-                } else if (!d_invalidate(dentry)) {
-                        dput(dentry);
-                        dentry = NULL;
-                }
-        }
-        return dentry;
-}
-
 /**
  * complete_walk - successful completion of path walk
  * @nd:  pointer nameidata
@@ -568,40 +489,6 @@ static int complete_walk(struct nameidata *nd)
         return status;
 }
 
-/*
- * Short-cut version of permission(), for calling on directories
- * during pathname resolution.  Combines parts of permission()
- * and generic_permission(), and tests ONLY for MAY_EXEC permission.
- *
- * If appropriate, check DAC only.  If not appropriate, or
- * short-cut DAC fails, then call ->permission() to do more
- * complete permission check.
- */
-static inline int exec_permission(struct inode *inode, unsigned int flags)
-{
-        int ret;
-        struct user_namespace *ns = inode_userns(inode);
-
-        if (inode->i_op->permission) {
-                ret = inode->i_op->permission(inode, MAY_EXEC, flags);
-        } else {
-                ret = acl_permission_check(inode, MAY_EXEC, flags,
-                                inode->i_op->check_acl);
-        }
-        if (likely(!ret))
-                goto ok;
-        if (ret == -ECHILD)
-                return ret;
-
-        if (ns_capable(ns, CAP_DAC_OVERRIDE) ||
-                        ns_capable(ns, CAP_DAC_READ_SEARCH))
-                goto ok;
-
-        return ret;
-ok:
-        return security_inode_exec_permission(inode, flags);
-}
-
 static __always_inline void set_root(struct nameidata *nd)
 {
         if (!nd->root.mnt)
@@ -776,7 +663,7 @@ static int follow_automount(struct path *path, unsigned flags,
         /* We don't want to mount if someone supplied AT_NO_AUTOMOUNT
          * and this is the terminal part of the path.
          */
-        if ((flags & LOOKUP_NO_AUTOMOUNT) && !(flags & LOOKUP_CONTINUE))
+        if ((flags & LOOKUP_NO_AUTOMOUNT) && !(flags & LOOKUP_PARENT))
                 return -EISDIR; /* we actually want to stop here */
 
         /* We want to mount if someone is trying to open/create a file of any
@@ -788,7 +675,7 @@ static int follow_automount(struct path *path, unsigned flags,
          * appended a '/' to the name.
          */
         if (!(flags & LOOKUP_FOLLOW) &&
-            !(flags & (LOOKUP_CONTINUE | LOOKUP_DIRECTORY |
+            !(flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY |
                        LOOKUP_OPEN | LOOKUP_CREATE)))
                 return -EISDIR;
 
@@ -807,7 +694,7 @@ static int follow_automount(struct path *path, unsigned flags,
                  * the path being looked up; if it wasn't then the remainder of
                  * the path is inaccessible and we should say so.
                  */
-                if (PTR_ERR(mnt) == -EISDIR && (flags & LOOKUP_CONTINUE))
+                if (PTR_ERR(mnt) == -EISDIR && (flags & LOOKUP_PARENT))
                         return -EREMOTE;
                 return PTR_ERR(mnt);
         }
@@ -1134,6 +1021,30 @@ static struct dentry *d_alloc_and_lookup(struct dentry *parent,
 }
 
 /*
+ * We already have a dentry, but require a lookup to be performed on the parent
+ * directory to fill in d_inode. Returns the new dentry, or ERR_PTR on error.
+ * parent->d_inode->i_mutex must be held. d_lookup must have verified that no
+ * child exists while under i_mutex.
+ */
+static struct dentry *d_inode_lookup(struct dentry *parent, struct dentry *dentry,
+                                     struct nameidata *nd)
+{
+        struct inode *inode = parent->d_inode;
+        struct dentry *old;
+
+        /* Don't create child dentry for a dead directory. */
+        if (unlikely(IS_DEADDIR(inode)))
+                return ERR_PTR(-ENOENT);
+
+        old = inode->i_op->lookup(inode, dentry, nd);
+        if (unlikely(old)) {
+                dput(dentry);
+                dentry = old;
+        }
+        return dentry;
+}
+
+/*
  *  It's more convoluted than I'd like it to be, but... it's still fairly
  *  small and for now I'd prefer to have fast path as straight as possible.
  *  It _is_ time-critical.
@@ -1172,6 +1083,8 @@ static int do_lookup(struct nameidata *nd, struct qstr *name,
                                 goto unlazy;
                         }
                 }
+                if (unlikely(d_need_lookup(dentry)))
+                        goto unlazy;
                 path->mnt = mnt;
                 path->dentry = dentry;
                 if (unlikely(!__follow_mount_rcu(nd, path, inode)))
@@ -1186,6 +1099,10 @@ unlazy:
                 dentry = __d_lookup(parent, name);
         }
 
+        if (dentry && unlikely(d_need_lookup(dentry))) {
+                dput(dentry);
+                dentry = NULL;
+        }
 retry:
         if (unlikely(!dentry)) {
                 struct inode *dir = parent->d_inode;
@@ -1202,6 +1119,15 @@ retry:
                         /* known good */
                         need_reval = 0;
                         status = 1;
+                } else if (unlikely(d_need_lookup(dentry))) {
+                        dentry = d_inode_lookup(parent, dentry, nd);
+                        if (IS_ERR(dentry)) {
+                                mutex_unlock(&dir->i_mutex);
+                                return PTR_ERR(dentry);
+                        }
+                        /* known good */
+                        need_reval = 0;
+                        status = 1;
                 }
                 mutex_unlock(&dir->i_mutex);
         }
@@ -1234,13 +1160,13 @@ retry:
 static inline int may_lookup(struct nameidata *nd)
 {
         if (nd->flags & LOOKUP_RCU) {
-                int err = exec_permission(nd->inode, IPERM_FLAG_RCU);
+                int err = inode_permission(nd->inode, MAY_EXEC|MAY_NOT_BLOCK);
                 if (err != -ECHILD)
                         return err;
                 if (unlazy_walk(nd, NULL))
                         return -ECHILD;
         }
-        return exec_permission(nd->inode, 0);
+        return inode_permission(nd->inode, MAY_EXEC);
 }
 
 static inline int handle_dots(struct nameidata *nd, int type)
@@ -1354,7 +1280,6 @@ static int link_path_walk(const char *name, struct nameidata *nd)
 {
         struct path next;
         int err;
-        unsigned int lookup_flags = nd->flags;
         
         while (*name=='/')
                 name++;
@@ -1368,8 +1293,6 @@ static int link_path_walk(const char *name, struct nameidata *nd)
                 unsigned int c;
                 int type;
 
-                nd->flags |= LOOKUP_CONTINUE;
-
                 err = may_lookup(nd);
                 if (err)
                         break;
@@ -1431,8 +1354,6 @@ static int link_path_walk(const char *name, struct nameidata *nd)
                 /* here ends the main loop */
 
 last_component:
-                /* Clear LOOKUP_CONTINUE iff it was previously unset */
-                nd->flags &= lookup_flags | ~LOOKUP_CONTINUE;
                 nd->last = this;
                 nd->last_type = type;
                 return 0;
@@ -1515,7 +1436,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
                         if (!S_ISDIR(dentry->d_inode->i_mode))
                                 goto fput_fail;
 
-                        retval = file_permission(file, MAY_EXEC);
+                        retval = inode_permission(dentry->d_inode, MAY_EXEC);
                         if (retval)
                                 goto fput_fail;
                 }
@@ -1653,16 +1574,22 @@ int kern_path(const char *name, unsigned int flags, struct path *path)
  * @mnt: pointer to vfs mount of the base directory
  * @name: pointer to file name
  * @flags: lookup flags
- * @nd: pointer to nameidata
+ * @path: pointer to struct path to fill
  */
 int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt,
                     const char *name, unsigned int flags,
-                    struct nameidata *nd)
+                    struct path *path)
 {
-        nd->root.dentry = dentry;
-        nd->root.mnt = mnt;
+        struct nameidata nd;
+        int err;
+        nd.root.dentry = dentry;
+        nd.root.mnt = mnt;
+        BUG_ON(flags & LOOKUP_PARENT);
         /* the first argument of do_path_lookup() is ignored with LOOKUP_ROOT */
-        return do_path_lookup(AT_FDCWD, name, flags | LOOKUP_ROOT, nd);
+        err = do_path_lookup(AT_FDCWD, name, flags | LOOKUP_ROOT, &nd);
+        if (!err)
+                *path = nd.path;
+        return err;
 }
 
 static struct dentry *__lookup_hash(struct qstr *name,
@@ -1672,7 +1599,7 @@ static struct dentry *__lookup_hash(struct qstr *name,
         struct dentry *dentry;
         int err;
 
-        err = exec_permission(inode, 0);
+        err = inode_permission(inode, MAY_EXEC);
         if (err)
                 return ERR_PTR(err);
 
@@ -1683,8 +1610,34 @@ static struct dentry *__lookup_hash(struct qstr *name,
          */
         dentry = d_lookup(base, name);
 
-        if (dentry && (dentry->d_flags & DCACHE_OP_REVALIDATE))
-                dentry = do_revalidate(dentry, nd);
+        if (dentry && d_need_lookup(dentry)) {
+                /*
+                 * __lookup_hash is called with the parent dir's i_mutex already
+                 * held, so we are good to go here.
+                 */
+                dentry = d_inode_lookup(base, dentry, nd);
+                if (IS_ERR(dentry))
+                        return dentry;
+        }
+
+        if (dentry && (dentry->d_flags & DCACHE_OP_REVALIDATE)) {
+                int status = d_revalidate(dentry, nd);
+                if (unlikely(status <= 0)) {
+                        /*
+                         * The dentry failed validation.
+                         * If d_revalidate returned 0 attempt to invalidate
+                         * the dentry otherwise d_revalidate is asking us
+                         * to return a fail status.
+                         */
+                        if (status < 0) {
+                                dput(dentry);
+                                return ERR_PTR(status);
+                        } else if (!d_invalidate(dentry)) {
+                                dput(dentry);
+                                dentry = NULL;
+                        }
+                }
+        }
 
         if (!dentry)
                 dentry = d_alloc_and_lookup(base, name, nd);
@@ -2012,27 +1965,10 @@ static int handle_truncate(struct file *filp)
         return error;
 }
 
-/*
- * Note that while the flag value (low two bits) for sys_open means:
- *      00 - read-only
- *      01 - write-only
- *      10 - read-write
- *      11 - special
- * it is changed into
- *      00 - no permissions needed
- *      01 - read-permission
- *      10 - write-permission
- *      11 - read-write
- * for the internal routines (ie open_namei()/follow_link() etc)
- * This is more logical, and also allows the 00 "no perm needed"
- * to be used for symlinks (where the permissions are checked
- * later).
- *
-*/
 static inline int open_to_namei_flags(int flag)
 {
-        if ((flag+1) & O_ACCMODE)
-                flag++;
+        if ((flag & O_ACCMODE) == 3)
+                flag--;
         return flag;
 }
 
@@ -2327,35 +2263,29 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
         return file;
 }
 
-/**
- * lookup_create - lookup a dentry, creating it if it doesn't exist
- * @nd: nameidata info
- * @is_dir: directory flag
- *
- * Simple function to lookup and return a dentry and create it
- * if it doesn't exist.  Is SMP-safe.
- *
- * Returns with nd->path.dentry->d_inode->i_mutex locked.
- */
-struct dentry *lookup_create(struct nameidata *nd, int is_dir)
+struct dentry *kern_path_create(int dfd, const char *pathname, struct path *path, int is_dir)
 {
         struct dentry *dentry = ERR_PTR(-EEXIST);
+        struct nameidata nd;
+        int error = do_path_lookup(dfd, pathname, LOOKUP_PARENT, &nd);
+        if (error)
+                return ERR_PTR(error);
 
-        mutex_lock_nested(&nd->path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
         /*
          * Yucky last component or no last component at all?
          * (foo/., foo/.., /////)
          */
-        if (nd->last_type != LAST_NORM)
-                goto fail;
-        nd->flags &= ~LOOKUP_PARENT;
-        nd->flags |= LOOKUP_CREATE | LOOKUP_EXCL;
-        nd->intent.open.flags = O_EXCL;
+        if (nd.last_type != LAST_NORM)
+                goto out;
+        nd.flags &= ~LOOKUP_PARENT;
+        nd.flags |= LOOKUP_CREATE | LOOKUP_EXCL;
+        nd.intent.open.flags = O_EXCL;
 
         /*
          * Do the final lookup.
          */
-        dentry = lookup_hash(nd);
+        mutex_lock_nested(&nd.path.dentry->d_inode->i_mutex, I_MUTEX_PARENT);
+        dentry = lookup_hash(&nd);
         if (IS_ERR(dentry))
                 goto fail;
 
@@ -2367,18 +2297,35 @@ struct dentry *lookup_create(struct nameidata *nd, int is_dir)
          * all is fine. Let's be bastards - you had / on the end, you've
          * been asking for (non-existent) directory. -ENOENT for you.
          */
-        if (unlikely(!is_dir && nd->last.name[nd->last.len])) {
+        if (unlikely(!is_dir && nd.last.name[nd.last.len])) {
                 dput(dentry);
                 dentry = ERR_PTR(-ENOENT);
+                goto fail;
         }
+        *path = nd.path;
         return dentry;
 eexist:
         dput(dentry);
         dentry = ERR_PTR(-EEXIST);
 fail:
+        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
+out:
+        path_put(&nd.path);
         return dentry;
 }
-EXPORT_SYMBOL_GPL(lookup_create);
+EXPORT_SYMBOL(kern_path_create);
+
+struct dentry *user_path_create(int dfd, const char __user *pathname, struct path *path, int is_dir)
+{
+        char *tmp = getname(pathname);
+        struct dentry *res;
+        if (IS_ERR(tmp))
+                return ERR_CAST(tmp);
+        res = kern_path_create(dfd, tmp, path, is_dir);
+        putname(tmp);
+        return res;
+}
+EXPORT_SYMBOL(user_path_create);
 
 int vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
 {
@@ -2428,54 +2375,46 @@ static int may_mknod(mode_t mode)
 SYSCALL_DEFINE4(mknodat, int, dfd, const char __user *, filename, int, mode,
                 unsigned, dev)
 {
-        int error;
-        char *tmp;
         struct dentry *dentry;
-        struct nameidata nd;
+        struct path path;
+        int error;
 
         if (S_ISDIR(mode))
                 return -EPERM;
 
-        error = user_path_parent(dfd, filename, &nd, &tmp);
-        if (error)
-                return error;
+        dentry = user_path_create(dfd, filename, &path, 0);
+        if (IS_ERR(dentry))
+                return PTR_ERR(dentry);
 
-        dentry = lookup_create(&nd, 0);
-        if (IS_ERR(dentry)) {
-                error = PTR_ERR(dentry);
-                goto out_unlock;
-        }
-        if (!IS_POSIXACL(nd.path.dentry->d_inode))
+        if (!IS_POSIXACL(path.dentry->d_inode))
                 mode &= ~current_umask();
         error = may_mknod(mode);
         if (error)
                 goto out_dput;
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
         if (error)
                 goto out_dput;
-        error = security_path_mknod(&nd.path, dentry, mode, dev);
+        error = security_path_mknod(&path, dentry, mode, dev);
         if (error)
                 goto out_drop_write;
         switch (mode & S_IFMT) {
                 case 0: case S_IFREG:
-                        error = vfs_create(nd.path.dentry->d_inode,dentry,mode,&nd);
+                        error = vfs_create(path.dentry->d_inode,dentry,mode,NULL);
                         break;
                 case S_IFCHR: case S_IFBLK:
-                        error = vfs_mknod(nd.path.dentry->d_inode,dentry,mode,
+                        error = vfs_mknod(path.dentry->d_inode,dentry,mode,
                                         new_decode_dev(dev));
                         break;
                 case S_IFIFO: case S_IFSOCK:
-                        error = vfs_mknod(nd.path.dentry->d_inode,dentry,mode,0);
+                        error = vfs_mknod(path.dentry->d_inode,dentry,mode,0);
                         break;
         }
 out_drop_write:
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(path.mnt);
 out_dput:
         dput(dentry);
-out_unlock:
-        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-        path_put(&nd.path);
-        putname(tmp);
+        mutex_unlock(&path.dentry->d_inode->i_mutex);
+        path_put(&path);
 
         return error;
 }
@@ -2508,38 +2447,29 @@ int vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 
 SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, int, mode)
 {
-        int error = 0;
-        char * tmp;
         struct dentry *dentry;
-        struct nameidata nd;
-
-        error = user_path_parent(dfd, pathname, &nd, &tmp);
-        if (error)
-                goto out_err;
+        struct path path;
+        int error;
 
-        dentry = lookup_create(&nd, 1);
-        error = PTR_ERR(dentry);
+        dentry = user_path_create(dfd, pathname, &path, 1);
         if (IS_ERR(dentry))
-                goto out_unlock;
+                return PTR_ERR(dentry);
 
-        if (!IS_POSIXACL(nd.path.dentry->d_inode))
+        if (!IS_POSIXACL(path.dentry->d_inode))
                 mode &= ~current_umask();
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
         if (error)
                 goto out_dput;
-        error = security_path_mkdir(&nd.path, dentry, mode);
+        error = security_path_mkdir(&path, dentry, mode);
         if (error)
                 goto out_drop_write;
-        error = vfs_mkdir(nd.path.dentry->d_inode, dentry, mode);
+        error = vfs_mkdir(path.dentry->d_inode, dentry, mode);
 out_drop_write:
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(path.mnt);
 out_dput:
         dput(dentry);
-out_unlock:
-        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-        path_put(&nd.path);
-        putname(tmp);
-out_err:
+        mutex_unlock(&path.dentry->d_inode->i_mutex);
+        path_put(&path);
         return error;
 }
 
@@ -2799,38 +2729,31 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
 {
         int error;
         char *from;
-        char *to;
         struct dentry *dentry;
-        struct nameidata nd;
+        struct path path;
 
         from = getname(oldname);
         if (IS_ERR(from))
                 return PTR_ERR(from);
 
-        error = user_path_parent(newdfd, newname, &nd, &to);
-        if (error)
-                goto out_putname;
-
-        dentry = lookup_create(&nd, 0);
+        dentry = user_path_create(newdfd, newname, &path, 0);
         error = PTR_ERR(dentry);
         if (IS_ERR(dentry))
-                goto out_unlock;
+                goto out_putname;
 
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(path.mnt);
         if (error)
                 goto out_dput;
-        error = security_path_symlink(&nd.path, dentry, from);
+        error = security_path_symlink(&path, dentry, from);
         if (error)
                 goto out_drop_write;
-        error = vfs_symlink(nd.path.dentry->d_inode, dentry, from);
+        error = vfs_symlink(path.dentry->d_inode, dentry, from);
 out_drop_write:
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(path.mnt);
 out_dput:
         dput(dentry);
-out_unlock:
-        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-        path_put(&nd.path);
-        putname(to);
+        mutex_unlock(&path.dentry->d_inode->i_mutex);
+        path_put(&path);
 out_putname:
         putname(from);
         return error;
@@ -2895,11 +2818,9 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
                 int, newdfd, const char __user *, newname, int, flags)
 {
         struct dentry *new_dentry;
-        struct nameidata nd;
-        struct path old_path;
+        struct path old_path, new_path;
         int how = 0;
         int error;
-        char *to;
 
         if ((flags & ~(AT_SYMLINK_FOLLOW | AT_EMPTY_PATH)) != 0)
                 return -EINVAL;
@@ -2921,32 +2842,27 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
         if (error)
                 return error;
 
-        error = user_path_parent(newdfd, newname, &nd, &to);
-        if (error)
-                goto out;
-        error = -EXDEV;
-        if (old_path.mnt != nd.path.mnt)
-                goto out_release;
-        new_dentry = lookup_create(&nd, 0);
+        new_dentry = user_path_create(newdfd, newname, &new_path, 0);
         error = PTR_ERR(new_dentry);
         if (IS_ERR(new_dentry))
-                goto out_unlock;
-        error = mnt_want_write(nd.path.mnt);
+                goto out;
+
+        error = -EXDEV;
+        if (old_path.mnt != new_path.mnt)
+                goto out_dput;
+        error = mnt_want_write(new_path.mnt);
         if (error)
                 goto out_dput;
-        error = security_path_link(old_path.dentry, &nd.path, new_dentry);
+        error = security_path_link(old_path.dentry, &new_path, new_dentry);
         if (error)
                 goto out_drop_write;
-        error = vfs_link(old_path.dentry, nd.path.dentry->d_inode, new_dentry);
+        error = vfs_link(old_path.dentry, new_path.dentry->d_inode, new_dentry);
 out_drop_write:
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(new_path.mnt);
 out_dput:
         dput(new_dentry);
-out_unlock:
-        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-out_release:
-        path_put(&nd.path);
-        putname(to);
+        mutex_unlock(&new_path.dentry->d_inode->i_mutex);
+        path_put(&new_path);
 out:
         path_put(&old_path);
 
@@ -3352,11 +3268,9 @@ EXPORT_SYMBOL(page_readlink);
 EXPORT_SYMBOL(__page_symlink);
 EXPORT_SYMBOL(page_symlink);
 EXPORT_SYMBOL(page_symlink_inode_operations);
-EXPORT_SYMBOL(kern_path_parent);
 EXPORT_SYMBOL(kern_path);
 EXPORT_SYMBOL(vfs_path_lookup);
 EXPORT_SYMBOL(inode_permission);
-EXPORT_SYMBOL(file_permission);
 EXPORT_SYMBOL(unlock_rename);
 EXPORT_SYMBOL(vfs_create);
 EXPORT_SYMBOL(vfs_follow_link);
diff --git a/fs/namespace.c b/fs/namespace.c
index fe59bd145d21..cda50fe9250a 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -934,8 +934,8 @@ int mnt_had_events(struct proc_mounts *p)
         int res = 0;
 
         br_read_lock(vfsmount_lock);
-        if (p->event != ns->event) {
-                p->event = ns->event;
+        if (p->m.poll_event != ns->event) {
+                p->m.poll_event = ns->event;
                 res = 1;
         }
         br_read_unlock(vfsmount_lock);
diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c
index 0ed65e0c3dfe..64a326418aa2 100644
--- a/fs/ncpfs/file.c
+++ b/fs/ncpfs/file.c
@@ -20,9 +20,9 @@
 
 #include "ncp_fs.h"
 
-static int ncp_fsync(struct file *file, int datasync)
+static int ncp_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
-        return 0;
+        return filemap_write_and_wait_range(file->f_mapping, start, end);
 }
 
 /*
diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c
index 84690319e625..c98b439332fc 100644
--- a/fs/nfs/cache_lib.c
+++ b/fs/nfs/cache_lib.c
@@ -113,19 +113,18 @@ int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq)
 
 int nfs_cache_register(struct cache_detail *cd)
 {
-        struct nameidata nd;
         struct vfsmount *mnt;
+        struct path path;
         int ret;
 
         mnt = rpc_get_mount();
         if (IS_ERR(mnt))
                 return PTR_ERR(mnt);
-        ret = vfs_path_lookup(mnt->mnt_root, mnt, "/cache", 0, &nd);
+        ret = vfs_path_lookup(mnt->mnt_root, mnt, "/cache", 0, &path);
         if (ret)
                 goto err;
-        ret = sunrpc_cache_register_pipefs(nd.path.dentry,
-                        cd->name, 0600, cd);
-        path_put(&nd.path);
+        ret = sunrpc_cache_register_pipefs(path.dentry, cd->name, 0600, cd);
+        path_put(&path);
         if (!ret)
                 return ret;
 err:
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index ededdbd0db38..57f578e2560a 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -56,7 +56,7 @@ static int nfs_link(struct dentry *, struct inode *, struct dentry *);
 static int nfs_mknod(struct inode *, struct dentry *, int, dev_t);
 static int nfs_rename(struct inode *, struct dentry *,
                       struct inode *, struct dentry *);
-static int nfs_fsync_dir(struct file *, int);
+static int nfs_fsync_dir(struct file *, loff_t, loff_t, int);
 static loff_t nfs_llseek_dir(struct file *, loff_t, int);
 static void nfs_readdir_clear_array(struct page*);
 
@@ -945,15 +945,19 @@ out:
  * All directory operations under NFS are synchronous, so fsync()
  * is a dummy operation.
  */
-static int nfs_fsync_dir(struct file *filp, int datasync)
+static int nfs_fsync_dir(struct file *filp, loff_t start, loff_t end,
+                         int datasync)
 {
         struct dentry *dentry = filp->f_path.dentry;
+        struct inode *inode = dentry->d_inode;
 
         dfprintk(FILE, "NFS: fsync dir(%s/%s) datasync %d\n",
                         dentry->d_parent->d_name.name, dentry->d_name.name,
                         datasync);
 
+        mutex_lock(&inode->i_mutex);
         nfs_inc_stats(dentry->d_inode, NFSIOS_VFSFSYNC);
+        mutex_unlock(&inode->i_mutex);
         return 0;
 }
 
@@ -997,14 +1001,12 @@ 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.
- * We check for this using LOOKUP_CONTINUE and LOOKUP_PARENT.
+ * 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)
 {
-        if (nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))
-                return 0;
         return nd->flags & mask;
 }
 
@@ -1338,25 +1340,31 @@ static int is_atomic_open(struct nameidata *nd)
                 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|FMODE_WRITE)))
+            (nd->intent.open.flags & (O_CREAT|O_TRUNC|O_ACCMODE)))
                 return 0;
         return 1;
 }
 
-static struct nfs_open_context *nameidata_to_nfs_open_context(struct dentry *dentry, struct nameidata *nd)
+static fmode_t flags_to_mode(int flags)
+{
+        fmode_t res = (__force fmode_t)flags & FMODE_EXEC;
+        if ((flags & O_ACCMODE) != O_WRONLY)
+                res |= FMODE_READ;
+        if ((flags & O_ACCMODE) != O_RDONLY)
+                res |= FMODE_WRITE;
+        return res;
+}
+
+static struct nfs_open_context *create_nfs_open_context(struct dentry *dentry, int open_flags)
 {
-        struct path path = {
-                .mnt = nd->path.mnt,
-                .dentry = dentry,
-        };
         struct nfs_open_context *ctx;
         struct rpc_cred *cred;
-        fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
+        fmode_t fmode = flags_to_mode(open_flags);
 
         cred = rpc_lookup_cred();
         if (IS_ERR(cred))
                 return ERR_CAST(cred);
-        ctx = alloc_nfs_open_context(&path, cred, fmode);
+        ctx = alloc_nfs_open_context(dentry, cred, fmode);
         put_rpccred(cred);
         if (ctx == NULL)
                 return ERR_PTR(-ENOMEM);
@@ -1376,13 +1384,13 @@ static int nfs_intent_set_file(struct nameidata *nd, struct nfs_open_context *ct
 
         /* If the open_intent is for execute, we have an extra check to make */
         if (ctx->mode & FMODE_EXEC) {
-                ret = nfs_may_open(ctx->path.dentry->d_inode,
+                ret = nfs_may_open(ctx->dentry->d_inode,
                                 ctx->cred,
                                 nd->intent.open.flags);
                 if (ret < 0)
                         goto out;
         }
-        filp = lookup_instantiate_filp(nd, ctx->path.dentry, do_open);
+        filp = lookup_instantiate_filp(nd, ctx->dentry, do_open);
         if (IS_ERR(filp))
                 ret = PTR_ERR(filp);
         else
@@ -1420,12 +1428,13 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
                 goto out;
         }
 
-        ctx = nameidata_to_nfs_open_context(dentry, nd);
+        open_flags = nd->intent.open.flags;
+
+        ctx = create_nfs_open_context(dentry, open_flags);
         res = ERR_CAST(ctx);
         if (IS_ERR(ctx))
                 goto out;
 
-        open_flags = nd->intent.open.flags;
         if (nd->flags & LOOKUP_CREATE) {
                 attr.ia_mode = nd->intent.open.create_mode;
                 attr.ia_valid = ATTR_MODE;
@@ -1463,8 +1472,8 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
         res = d_add_unique(dentry, inode);
         nfs_unblock_sillyrename(dentry->d_parent);
         if (res != NULL) {
-                dput(ctx->path.dentry);
-                ctx->path.dentry = dget(res);
+                dput(ctx->dentry);
+                ctx->dentry = dget(res);
                 dentry = res;
         }
         err = nfs_intent_set_file(nd, ctx);
@@ -1517,7 +1526,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
         /* We can't create new files, or truncate existing ones here */
         openflags &= ~(O_CREAT|O_EXCL|O_TRUNC);
 
-        ctx = nameidata_to_nfs_open_context(dentry, nd);
+        ctx = create_nfs_open_context(dentry, openflags);
         ret = PTR_ERR(ctx);
         if (IS_ERR(ctx))
                 goto out;
@@ -1570,7 +1579,7 @@ static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode,
         struct nfs_open_context *ctx = NULL;
         struct iattr attr;
         int error;
-        int open_flags = 0;
+        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);
@@ -1578,27 +1587,27 @@ static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode,
         attr.ia_mode = mode;
         attr.ia_valid = ATTR_MODE;
 
-        if ((nd->flags & LOOKUP_CREATE) != 0) {
+        if (nd)
                 open_flags = nd->intent.open.flags;
 
-                ctx = nameidata_to_nfs_open_context(dentry, nd);
-                error = PTR_ERR(ctx);
-                if (IS_ERR(ctx))
-                        goto out_err_drop;
-        }
+        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 (ctx != NULL) {
+        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:
-        if (ctx != NULL)
-                put_nfs_open_context(ctx);
+        put_nfs_open_context(ctx);
 out_err_drop:
         d_drop(dentry);
 out_err:
@@ -1660,7 +1669,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
 {
         struct iattr attr;
         int error;
-        int open_flags = 0;
+        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);
@@ -1668,7 +1677,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
         attr.ia_mode = mode;
         attr.ia_valid = ATTR_MODE;
 
-        if ((nd->flags & LOOKUP_CREATE) != 0)
+        if (nd)
                 open_flags = nd->intent.open.flags;
 
         error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, NULL);
@@ -2259,11 +2268,11 @@ static int nfs_open_permission_mask(int openflags)
 {
         int mask = 0;
 
-        if (openflags & FMODE_READ)
+        if ((openflags & O_ACCMODE) != O_WRONLY)
                 mask |= MAY_READ;
-        if (openflags & FMODE_WRITE)
+        if ((openflags & O_ACCMODE) != O_RDONLY)
                 mask |= MAY_WRITE;
-        if (openflags & FMODE_EXEC)
+        if (openflags & __FMODE_EXEC)
                 mask |= MAY_EXEC;
         return mask;
 }
@@ -2273,12 +2282,12 @@ int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags)
         return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags));
 }
 
-int nfs_permission(struct inode *inode, int mask, unsigned int flags)
+int nfs_permission(struct inode *inode, int mask)
 {
         struct rpc_cred *cred;
         int res = 0;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         nfs_inc_stats(inode, NFSIOS_VFSACCESS);
@@ -2328,7 +2337,7 @@ out:
 out_notsup:
         res = nfs_revalidate_inode(NFS_SERVER(inode), inode);
         if (res == 0)
-                res = generic_permission(inode, mask, flags, NULL);
+                res = generic_permission(inode, mask);
         goto out;
 }
 
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 8eea25366717..b35d25b98da6 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -284,7 +284,7 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
                                                 loff_t pos)
 {
         struct nfs_open_context *ctx = dreq->ctx;
-        struct inode *inode = ctx->path.dentry->d_inode;
+        struct inode *inode = ctx->dentry->d_inode;
         unsigned long user_addr = (unsigned long)iov->iov_base;
         size_t count = iov->iov_len;
         size_t rsize = NFS_SERVER(inode)->rsize;
@@ -715,7 +715,7 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
                                                  loff_t pos, int sync)
 {
         struct nfs_open_context *ctx = dreq->ctx;
-        struct inode *inode = ctx->path.dentry->d_inode;
+        struct inode *inode = ctx->dentry->d_inode;
         unsigned long user_addr = (unsigned long)iov->iov_base;
         size_t count = iov->iov_len;
         struct rpc_task *task;
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 2f093ed16980..28b8c3f3cda3 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -55,7 +55,7 @@ static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
 static ssize_t nfs_file_write(struct kiocb *, const struct iovec *iov,
                                 unsigned long nr_segs, loff_t pos);
 static int  nfs_file_flush(struct file *, fl_owner_t id);
-static int  nfs_file_fsync(struct file *, int datasync);
+static int  nfs_file_fsync(struct file *, loff_t, loff_t, int datasync);
 static int nfs_check_flags(int flags);
 static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl);
 static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl);
@@ -187,8 +187,11 @@ static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
                         filp->f_path.dentry->d_name.name,
                         offset, origin);
 
-        /* origin == SEEK_END => we must revalidate the cached file length */
-        if (origin == SEEK_END) {
+        /*
+         * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
+         * the cached file length
+         */
+        if (origin != SEEK_SET || origin != SEEK_CUR) {
                 struct inode *inode = filp->f_mapping->host;
 
                 int retval = nfs_revalidate_file_size(inode, filp);
@@ -305,7 +308,7 @@ nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
  * fall back to doing a synchronous write.
  */
 static int
-nfs_file_fsync(struct file *file, int datasync)
+nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct dentry *dentry = file->f_path.dentry;
         struct nfs_open_context *ctx = nfs_file_open_context(file);
@@ -313,11 +316,15 @@ nfs_file_fsync(struct file *file, int datasync)
         int have_error, status;
         int ret = 0;
 
-
         dprintk("NFS: fsync file(%s/%s) datasync %d\n",
                         dentry->d_parent->d_name.name, dentry->d_name.name,
                         datasync);
 
+        ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (ret)
+                return ret;
+        mutex_lock(&inode->i_mutex);
+
         nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
         have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
         status = nfs_commit_inode(inode, FLUSH_SYNC);
@@ -329,6 +336,7 @@ nfs_file_fsync(struct file *file, int datasync)
         if (!ret && !datasync)
                 /* application has asked for meta-data sync */
                 ret = pnfs_layoutcommit_inode(inode, true);
+        mutex_unlock(&inode->i_mutex);
         return ret;
 }
 
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 6f4850deb272..fe1203797b2b 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -567,7 +567,7 @@ static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context
 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
 {
         struct nfs_lock_context *res, *new = NULL;
-        struct inode *inode = ctx->path.dentry->d_inode;
+        struct inode *inode = ctx->dentry->d_inode;
 
         spin_lock(&inode->i_lock);
         res = __nfs_find_lock_context(ctx);
@@ -594,7 +594,7 @@ struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
 {
         struct nfs_open_context *ctx = l_ctx->open_context;
-        struct inode *inode = ctx->path.dentry->d_inode;
+        struct inode *inode = ctx->dentry->d_inode;
 
         if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
                 return;
@@ -620,7 +620,7 @@ void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
                 return;
         if (!is_sync)
                 return;
-        inode = ctx->path.dentry->d_inode;
+        inode = ctx->dentry->d_inode;
         if (!list_empty(&NFS_I(inode)->open_files))
                 return;
         server = NFS_SERVER(inode);
@@ -629,14 +629,14 @@ void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
         nfs_revalidate_inode(server, inode);
 }
 
-struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode)
+struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred, fmode_t f_mode)
 {
         struct nfs_open_context *ctx;
 
         ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
         if (ctx != NULL) {
-                ctx->path = *path;
-                path_get(&ctx->path);
+                nfs_sb_active(dentry->d_sb);
+                ctx->dentry = dget(dentry);
                 ctx->cred = get_rpccred(cred);
                 ctx->state = NULL;
                 ctx->mode = f_mode;
@@ -658,7 +658,8 @@ struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
 
 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
 {
-        struct inode *inode = ctx->path.dentry->d_inode;
+        struct inode *inode = ctx->dentry->d_inode;
+        struct super_block *sb = ctx->dentry->d_sb;
 
         if (!list_empty(&ctx->list)) {
                 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
@@ -671,7 +672,8 @@ static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
                 NFS_PROTO(inode)->close_context(ctx, is_sync);
         if (ctx->cred != NULL)
                 put_rpccred(ctx->cred);
-        path_put(&ctx->path);
+        dput(ctx->dentry);
+        nfs_sb_deactive(sb);
         kfree(ctx);
 }
 
@@ -741,7 +743,7 @@ int nfs_open(struct inode *inode, struct file *filp)
         cred = rpc_lookup_cred();
         if (IS_ERR(cred))
                 return PTR_ERR(cred);
-        ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode);
+        ctx = alloc_nfs_open_context(filp->f_path.dentry, cred, filp->f_mode);
         put_rpccred(cred);
         if (ctx == NULL)
                 return -ENOMEM;
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index c4a69833dd0d..b788f2eb1ba0 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -238,7 +238,7 @@ extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
 extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *);
-extern int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc);
+extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc);
 extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
 extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
                 struct nfs4_fs_locations *fs_locations, struct page *page);
@@ -341,8 +341,8 @@ extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struc
 extern void nfs4_put_state_owner(struct nfs4_state_owner *);
 extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
 extern void nfs4_put_open_state(struct nfs4_state *);
-extern void nfs4_close_state(struct path *, struct nfs4_state *, fmode_t);
-extern void nfs4_close_sync(struct path *, struct nfs4_state *, fmode_t);
+extern void nfs4_close_state(struct nfs4_state *, fmode_t);
+extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
 extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
 extern void nfs4_schedule_lease_recovery(struct nfs_client *);
 extern void nfs4_schedule_state_manager(struct nfs_client *);
@@ -373,8 +373,8 @@ extern struct svc_version nfs4_callback_version4;
 
 #else
 
-#define nfs4_close_state(a, b, c) do { } while (0)
-#define nfs4_close_sync(a, b, c) do { } while (0)
+#define nfs4_close_state(a, b) do { } while (0)
+#define nfs4_close_sync(a, b) do { } while (0)
 
 #endif /* CONFIG_NFS_V4 */
 #endif /* __LINUX_FS_NFS_NFS4_FS.H */
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5879b23e0c99..26bece8f3083 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -763,8 +763,8 @@ struct nfs4_opendata {
         struct nfs_open_confirmres c_res;
         struct nfs_fattr f_attr;
         struct nfs_fattr dir_attr;
-        struct path path;
         struct dentry *dir;
+        struct dentry *dentry;
         struct nfs4_state_owner *owner;
         struct nfs4_state *state;
         struct iattr attrs;
@@ -786,12 +786,12 @@ static void nfs4_init_opendata_res(struct nfs4_opendata *p)
         nfs_fattr_init(&p->dir_attr);
 }
 
-static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
+static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
                 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
                 const struct iattr *attrs,
                 gfp_t gfp_mask)
 {
-        struct dentry *parent = dget_parent(path->dentry);
+        struct dentry *parent = dget_parent(dentry);
         struct inode *dir = parent->d_inode;
         struct nfs_server *server = NFS_SERVER(dir);
         struct nfs4_opendata *p;
@@ -802,8 +802,8 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
         p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
         if (p->o_arg.seqid == NULL)
                 goto err_free;
-        path_get(path);
-        p->path = *path;
+        nfs_sb_active(dentry->d_sb);
+        p->dentry = dget(dentry);
         p->dir = parent;
         p->owner = sp;
         atomic_inc(&sp->so_count);
@@ -812,7 +812,7 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
         p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
         p->o_arg.clientid = server->nfs_client->cl_clientid;
         p->o_arg.id = sp->so_owner_id.id;
-        p->o_arg.name = &p->path.dentry->d_name;
+        p->o_arg.name = &dentry->d_name;
         p->o_arg.server = server;
         p->o_arg.bitmask = server->attr_bitmask;
         p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
@@ -842,13 +842,15 @@ static void nfs4_opendata_free(struct kref *kref)
 {
         struct nfs4_opendata *p = container_of(kref,
                         struct nfs4_opendata, kref);
+        struct super_block *sb = p->dentry->d_sb;
 
         nfs_free_seqid(p->o_arg.seqid);
         if (p->state != NULL)
                 nfs4_put_open_state(p->state);
         nfs4_put_state_owner(p->owner);
         dput(p->dir);
-        path_put(&p->path);
+        dput(p->dentry);
+        nfs_sb_deactive(sb);
         kfree(p);
 }
 
@@ -1130,7 +1132,7 @@ static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context
 {
         struct nfs4_opendata *opendata;
 
-        opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
+        opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
         if (opendata == NULL)
                 return ERR_PTR(-ENOMEM);
         opendata->state = state;
@@ -1154,7 +1156,7 @@ static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmod
         newstate = nfs4_opendata_to_nfs4_state(opendata);
         if (IS_ERR(newstate))
                 return PTR_ERR(newstate);
-        nfs4_close_state(&opendata->path, newstate, fmode);
+        nfs4_close_state(newstate, fmode);
         *res = newstate;
         return 0;
 }
@@ -1352,7 +1354,7 @@ static void nfs4_open_confirm_release(void *calldata)
                 goto out_free;
         state = nfs4_opendata_to_nfs4_state(data);
         if (!IS_ERR(state))
-                nfs4_close_state(&data->path, state, data->o_arg.fmode);
+                nfs4_close_state(state, data->o_arg.fmode);
 out_free:
         nfs4_opendata_put(data);
 }
@@ -1497,7 +1499,7 @@ static void nfs4_open_release(void *calldata)
                 goto out_free;
         state = nfs4_opendata_to_nfs4_state(data);
         if (!IS_ERR(state))
-                nfs4_close_state(&data->path, state, data->o_arg.fmode);
+                nfs4_close_state(state, data->o_arg.fmode);
 out_free:
         nfs4_opendata_put(data);
 }
@@ -1648,7 +1650,7 @@ static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *s
                 return PTR_ERR(opendata);
         ret = nfs4_open_recover(opendata, state);
         if (ret == -ESTALE)
-                d_drop(ctx->path.dentry);
+                d_drop(ctx->dentry);
         nfs4_opendata_put(opendata);
         return ret;
 }
@@ -1706,7 +1708,7 @@ static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct
 /*
  * Returns a referenced nfs4_state
  */
-static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
+static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
 {
         struct nfs4_state_owner  *sp;
         struct nfs4_state     *state = NULL;
@@ -1723,15 +1725,15 @@ static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, in
         status = nfs4_recover_expired_lease(server);
         if (status != 0)
                 goto err_put_state_owner;
-        if (path->dentry->d_inode != NULL)
-                nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
+        if (dentry->d_inode != NULL)
+                nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
         status = -ENOMEM;
-        opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
+        opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
         if (opendata == NULL)
                 goto err_put_state_owner;
 
-        if (path->dentry->d_inode != NULL)
-                opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
+        if (dentry->d_inode != NULL)
+                opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
 
         status = _nfs4_proc_open(opendata);
         if (status != 0)
@@ -1769,14 +1771,14 @@ out_err:
 }
 
 
-static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
+static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
 {
         struct nfs4_exception exception = { };
         struct nfs4_state *res;
         int status;
 
         do {
-                status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
+                status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
                 if (status == 0)
                         break;
                 /* NOTE: BAD_SEQID means the server and client disagree about the
@@ -1873,7 +1875,6 @@ static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
 }
 
 struct nfs4_closedata {
-        struct path path;
         struct inode *inode;
         struct nfs4_state *state;
         struct nfs_closeargs arg;
@@ -1888,13 +1889,14 @@ static void nfs4_free_closedata(void *data)
 {
         struct nfs4_closedata *calldata = data;
         struct nfs4_state_owner *sp = calldata->state->owner;
+        struct super_block *sb = calldata->state->inode->i_sb;
 
         if (calldata->roc)
                 pnfs_roc_release(calldata->state->inode);
         nfs4_put_open_state(calldata->state);
         nfs_free_seqid(calldata->arg.seqid);
         nfs4_put_state_owner(sp);
-        path_put(&calldata->path);
+        nfs_sb_deactive(sb);
         kfree(calldata);
 }
 
@@ -2014,7 +2016,7 @@ static const struct rpc_call_ops nfs4_close_ops = {
  *
  * NOTE: Caller must be holding the sp->so_owner semaphore!
  */
-int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
+int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
 {
         struct nfs_server *server = NFS_SERVER(state->inode);
         struct nfs4_closedata *calldata;
@@ -2050,8 +2052,7 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, i
         calldata->res.seqid = calldata->arg.seqid;
         calldata->res.server = server;
         calldata->roc = roc;
-        path_get(path);
-        calldata->path = *path;
+        nfs_sb_active(calldata->inode->i_sb);
 
         msg.rpc_argp = &calldata->arg;
         msg.rpc_resp = &calldata->res;
@@ -2080,7 +2081,7 @@ nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags
         struct nfs4_state *state;
 
         /* Protect against concurrent sillydeletes */
-        state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
+        state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
         if (IS_ERR(state))
                 return ERR_CAST(state);
         ctx->state = state;
@@ -2092,9 +2093,9 @@ static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
         if (ctx->state == NULL)
                 return;
         if (is_sync)
-                nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
+                nfs4_close_sync(ctx->state, ctx->mode);
         else
-                nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
+                nfs4_close_state(ctx->state, ctx->mode);
 }
 
 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
@@ -2616,10 +2617,7 @@ static int
 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
                  int flags, struct nfs_open_context *ctx)
 {
-        struct path my_path = {
-                .dentry = dentry,
-        };
-        struct path *path = &my_path;
+        struct dentry *de = dentry;
         struct nfs4_state *state;
         struct rpc_cred *cred = NULL;
         fmode_t fmode = 0;
@@ -2627,11 +2625,11 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 
         if (ctx != NULL) {
                 cred = ctx->cred;
-                path = &ctx->path;
+                de = ctx->dentry;
                 fmode = ctx->mode;
         }
         sattr->ia_mode &= ~current_umask();
-        state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
+        state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
         d_drop(dentry);
         if (IS_ERR(state)) {
                 status = PTR_ERR(state);
@@ -2642,7 +2640,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
         if (ctx != NULL)
                 ctx->state = state;
         else
-                nfs4_close_sync(path, state, fmode);
+                nfs4_close_sync(state, fmode);
 out:
         return status;
 }
@@ -4294,7 +4292,7 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
                 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
                                         sizeof(data->lsp->ls_stateid.data));
                 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
-                renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
+                renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
         }
 out:
         dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index e97dd219f84f..7acfe8843626 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -641,7 +641,7 @@ void nfs4_put_open_state(struct nfs4_state *state)
 /*
  * Close the current file.
  */
-static void __nfs4_close(struct path *path, struct nfs4_state *state,
+static void __nfs4_close(struct nfs4_state *state,
                 fmode_t fmode, gfp_t gfp_mask, int wait)
 {
         struct nfs4_state_owner *owner = state->owner;
@@ -685,18 +685,18 @@ static void __nfs4_close(struct path *path, struct nfs4_state *state,
         } else {
                 bool roc = pnfs_roc(state->inode);
 
-                nfs4_do_close(path, state, gfp_mask, wait, roc);
+                nfs4_do_close(state, gfp_mask, wait, roc);
         }
 }
 
-void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode)
+void nfs4_close_state(struct nfs4_state *state, fmode_t fmode)
 {
-        __nfs4_close(path, state, fmode, GFP_NOFS, 0);
+        __nfs4_close(state, fmode, GFP_NOFS, 0);
 }
 
-void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode)
+void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode)
 {
-        __nfs4_close(path, state, fmode, GFP_KERNEL, 1);
+        __nfs4_close(state, fmode, GFP_KERNEL, 1);
 }
 
 /*
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 009855716286..18449f43c568 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -114,7 +114,7 @@ int nfs_set_page_tag_locked(struct nfs_page *req)
         if (!nfs_lock_request_dontget(req))
                 return 0;
         if (test_bit(PG_MAPPED, &req->wb_flags))
-                radix_tree_tag_set(&NFS_I(req->wb_context->path.dentry->d_inode)->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
+                radix_tree_tag_set(&NFS_I(req->wb_context->dentry->d_inode)->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
         return 1;
 }
 
@@ -124,7 +124,7 @@ int nfs_set_page_tag_locked(struct nfs_page *req)
 void nfs_clear_page_tag_locked(struct nfs_page *req)
 {
         if (test_bit(PG_MAPPED, &req->wb_flags)) {
-                struct inode *inode = req->wb_context->path.dentry->d_inode;
+                struct inode *inode = req->wb_context->dentry->d_inode;
                 struct nfs_inode *nfsi = NFS_I(inode);
 
                 spin_lock(&inode->i_lock);
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 20a7f952e244..a68679f538fc 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -144,7 +144,7 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
 
 static void nfs_readpage_release(struct nfs_page *req)
 {
-        struct inode *d_inode = req->wb_context->path.dentry->d_inode;
+        struct inode *d_inode = req->wb_context->dentry->d_inode;
 
         if (PageUptodate(req->wb_page))
                 nfs_readpage_to_fscache(d_inode, req->wb_page, 0);
@@ -152,8 +152,8 @@ static void nfs_readpage_release(struct nfs_page *req)
         unlock_page(req->wb_page);
 
         dprintk("NFS: read done (%s/%Ld %d@%Ld)\n",
-                        req->wb_context->path.dentry->d_inode->i_sb->s_id,
-                        (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
+                        req->wb_context->dentry->d_inode->i_sb->s_id,
+                        (long long)NFS_FILEID(req->wb_context->dentry->d_inode),
                         req->wb_bytes,
                         (long long)req_offset(req));
         nfs_release_request(req);
@@ -207,7 +207,7 @@ static int nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
                 unsigned int count, unsigned int offset,
                 struct pnfs_layout_segment *lseg)
 {
-        struct inode *inode = req->wb_context->path.dentry->d_inode;
+        struct inode *inode = req->wb_context->dentry->d_inode;
 
         data->req         = req;
         data->inode       = inode;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ce40e5c568ba..b961ceac66b4 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2773,16 +2773,12 @@ static void nfs_referral_loop_unprotect(void)
 static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
                 const char *export_path)
 {
-        struct nameidata *nd = NULL;
         struct mnt_namespace *ns_private;
         struct super_block *s;
         struct dentry *dentry;
+        struct path path;
         int ret;
 
-        nd = kmalloc(sizeof(*nd), GFP_KERNEL);
-        if (nd == NULL)
-                return ERR_PTR(-ENOMEM);
-
         ns_private = create_mnt_ns(root_mnt);
         ret = PTR_ERR(ns_private);
         if (IS_ERR(ns_private))
@@ -2793,7 +2789,7 @@ static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
                 goto out_put_mnt_ns;
 
         ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt,
-                        export_path, LOOKUP_FOLLOW, nd);
+                        export_path, LOOKUP_FOLLOW, &path);
 
         nfs_referral_loop_unprotect();
         put_mnt_ns(ns_private);
@@ -2801,12 +2797,11 @@ static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
         if (ret != 0)
                 goto out_err;
 
-        s = nd->path.mnt->mnt_sb;
+        s = path.mnt->mnt_sb;
         atomic_inc(&s->s_active);
-        dentry = dget(nd->path.dentry);
+        dentry = dget(path.dentry);
 
-        path_put(&nd->path);
-        kfree(nd);
+        path_put(&path);
         down_write(&s->s_umount);
         return dentry;
 out_put_mnt_ns:
@@ -2814,7 +2809,6 @@ out_put_mnt_ns:
 out_mntput:
         mntput(root_mnt);
 out_err:
-        kfree(nd);
         return ERR_PTR(ret);
 }
 
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 727168059684..08579312c57b 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -409,7 +409,7 @@ out:
  */
 static void nfs_inode_remove_request(struct nfs_page *req)
 {
-        struct inode *inode = req->wb_context->path.dentry->d_inode;
+        struct inode *inode = req->wb_context->dentry->d_inode;
         struct nfs_inode *nfsi = NFS_I(inode);
 
         BUG_ON (!NFS_WBACK_BUSY(req));
@@ -438,7 +438,7 @@ nfs_mark_request_dirty(struct nfs_page *req)
 static void
 nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg)
 {
-        struct inode *inode = req->wb_context->path.dentry->d_inode;
+        struct inode *inode = req->wb_context->dentry->d_inode;
         struct nfs_inode *nfsi = NFS_I(inode);
 
         spin_lock(&inode->i_lock);
@@ -852,13 +852,13 @@ static int nfs_write_rpcsetup(struct nfs_page *req,
                 struct pnfs_layout_segment *lseg,
                 int how)
 {
-        struct inode *inode = req->wb_context->path.dentry->d_inode;
+        struct inode *inode = req->wb_context->dentry->d_inode;
 
         /* Set up the RPC argument and reply structs
          * NB: take care not to mess about with data->commit et al. */
 
         data->req = req;
-        data->inode = inode = req->wb_context->path.dentry->d_inode;
+        data->inode = inode = req->wb_context->dentry->d_inode;
         data->cred = req->wb_context->cred;
         data->lseg = get_lseg(lseg);
 
@@ -1053,9 +1053,9 @@ static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata)
 
         dprintk("NFS: %5u write(%s/%lld %d@%lld)",
                 task->tk_pid,
-                data->req->wb_context->path.dentry->d_inode->i_sb->s_id,
+                data->req->wb_context->dentry->d_inode->i_sb->s_id,
                 (long long)
-                  NFS_FILEID(data->req->wb_context->path.dentry->d_inode),
+                  NFS_FILEID(data->req->wb_context->dentry->d_inode),
                 data->req->wb_bytes, (long long)req_offset(data->req));
 
         nfs_writeback_done(task, data);
@@ -1148,8 +1148,8 @@ static void nfs_writeback_release_full(void *calldata)
 
                 dprintk("NFS: %5u write (%s/%lld %d@%lld)",
                         data->task.tk_pid,
-                        req->wb_context->path.dentry->d_inode->i_sb->s_id,
-                        (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
+                        req->wb_context->dentry->d_inode->i_sb->s_id,
+                        (long long)NFS_FILEID(req->wb_context->dentry->d_inode),
                         req->wb_bytes,
                         (long long)req_offset(req));
 
@@ -1347,7 +1347,7 @@ void nfs_init_commit(struct nfs_write_data *data,
                             struct pnfs_layout_segment *lseg)
 {
         struct nfs_page *first = nfs_list_entry(head->next);
-        struct inode *inode = first->wb_context->path.dentry->d_inode;
+        struct inode *inode = first->wb_context->dentry->d_inode;
 
         /* Set up the RPC argument and reply structs
          * NB: take care not to mess about with data->commit et al. */
@@ -1435,8 +1435,8 @@ void nfs_commit_release_pages(struct nfs_write_data *data)
                 nfs_clear_request_commit(req);
 
                 dprintk("NFS:       commit (%s/%lld %d@%lld)",
-                        req->wb_context->path.dentry->d_inode->i_sb->s_id,
-                        (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
+                        req->wb_context->dentry->d_sb->s_id,
+                        (long long)NFS_FILEID(req->wb_context->dentry->d_inode),
                         req->wb_bytes,
                         (long long)req_offset(req));
                 if (status < 0) {
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index ffb59ef6f82f..29d77f60585b 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -191,52 +191,42 @@ nfsd4_build_namelist(void *arg, const char *name, int namlen,
 }
 
 static int
-nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f)
+nfsd4_list_rec_dir(recdir_func *f)
 {
         const struct cred *original_cred;
-        struct file *filp;
+        struct dentry *dir = rec_file->f_path.dentry;
         LIST_HEAD(names);
-        struct name_list *entry;
-        struct dentry *dentry;
         int status;
 
-        if (!rec_file)
-                return 0;
-
         status = nfs4_save_creds(&original_cred);
         if (status < 0)
                 return status;
 
-        filp = dentry_open(dget(dir), mntget(rec_file->f_path.mnt), O_RDONLY,
-                           current_cred());
-        status = PTR_ERR(filp);
-        if (IS_ERR(filp))
-                goto out;
-        status = vfs_readdir(filp, nfsd4_build_namelist, &names);
-        fput(filp);
+        status = vfs_llseek(rec_file, 0, SEEK_SET);
+        if (status < 0) {
+                nfs4_reset_creds(original_cred);
+                return status;
+        }
+
+        status = vfs_readdir(rec_file, nfsd4_build_namelist, &names);
         mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
         while (!list_empty(&names)) {
+                struct name_list *entry;
                 entry = list_entry(names.next, struct name_list, list);
-
-                dentry = lookup_one_len(entry->name, dir, HEXDIR_LEN-1);
-                if (IS_ERR(dentry)) {
-                        status = PTR_ERR(dentry);
-                        break;
+                if (!status) {
+                        struct dentry *dentry;
+                        dentry = lookup_one_len(entry->name, dir, HEXDIR_LEN-1);
+                        if (IS_ERR(dentry)) {
+                                status = PTR_ERR(dentry);
+                                break;
+                        }
+                        status = f(dir, dentry);
+                        dput(dentry);
                 }
-                status = f(dir, dentry);
-                dput(dentry);
-                if (status)
-                        break;
                 list_del(&entry->list);
                 kfree(entry);
         }
         mutex_unlock(&dir->d_inode->i_mutex);
-out:
-        while (!list_empty(&names)) {
-                entry = list_entry(names.next, struct name_list, list);
-                list_del(&entry->list);
-                kfree(entry);
-        }
         nfs4_reset_creds(original_cred);
         return status;
 }
@@ -322,7 +312,7 @@ nfsd4_recdir_purge_old(void) {
         status = mnt_want_write(rec_file->f_path.mnt);
         if (status)
                 goto out;
-        status = nfsd4_list_rec_dir(rec_file->f_path.dentry, purge_old);
+        status = nfsd4_list_rec_dir(purge_old);
         if (status == 0)
                 vfs_fsync(rec_file, 0);
         mnt_drop_write(rec_file->f_path.mnt);
@@ -352,7 +342,7 @@ nfsd4_recdir_load(void) {
         if (!rec_file)
                 return 0;
 
-        status = nfsd4_list_rec_dir(rec_file->f_path.dentry, load_recdir);
+        status = nfsd4_list_rec_dir(load_recdir);
         if (status)
                 printk("nfsd4: failed loading clients from recovery"
                         " directory %s\n", rec_file->f_path.dentry->d_name.name);
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index d7eeca62febd..26601529dc17 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -27,7 +27,7 @@
 #include "nilfs.h"
 #include "segment.h"
 
-int nilfs_sync_file(struct file *file, int datasync)
+int nilfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 {
         /*
          * Called from fsync() system call
@@ -40,8 +40,15 @@ int nilfs_sync_file(struct file *file, int datasync)
         struct inode *inode = file->f_mapping->host;
         int err;
 
-        if (!nilfs_inode_dirty(inode))
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+        mutex_lock(&inode->i_mutex);
+
+        if (!nilfs_inode_dirty(inode)) {
+                mutex_unlock(&inode->i_mutex);
                 return 0;
+        }
 
         if (datasync)
                 err = nilfs_construct_dsync_segment(inode->i_sb, inode, 0,
@@ -49,6 +56,7 @@ int nilfs_sync_file(struct file *file, int datasync)
         else
                 err = nilfs_construct_segment(inode->i_sb);
 
+        mutex_unlock(&inode->i_mutex);
         return err;
 }
 
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index b9b45fc2903e..666628b395f1 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -259,8 +259,8 @@ nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
                 return 0;
 
         /* Needs synchronization with the cleaner */
-        size = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
-                                  offset, nr_segs, nilfs_get_block, NULL);
+        size = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                  nilfs_get_block);
 
         /*
          * In case of error extending write may have instantiated a few
@@ -778,6 +778,8 @@ int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
 
         if ((iattr->ia_valid & ATTR_SIZE) &&
             iattr->ia_size != i_size_read(inode)) {
+                inode_dio_wait(inode);
+
                 err = vmtruncate(inode, iattr->ia_size);
                 if (unlikely(err))
                         goto out_err;
@@ -799,14 +801,14 @@ out_err:
         return err;
 }
 
-int nilfs_permission(struct inode *inode, int mask, unsigned int flags)
+int nilfs_permission(struct inode *inode, int mask)
 {
         struct nilfs_root *root = NILFS_I(inode)->i_root;
         if ((mask & MAY_WRITE) && root &&
             root->cno != NILFS_CPTREE_CURRENT_CNO)
                 return -EROFS; /* snapshot is not writable */
 
-        return generic_permission(inode, mask, flags, NULL);
+        return generic_permission(inode, mask);
 }
 
 int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh)
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 546849b3e88f..a3141990061e 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -72,12 +72,7 @@ nilfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
                 return ERR_PTR(-ENAMETOOLONG);
 
         ino = nilfs_inode_by_name(dir, &dentry->d_name);
-        inode = NULL;
-        if (ino) {
-                inode = nilfs_iget(dir->i_sb, NILFS_I(dir)->i_root, ino);
-                if (IS_ERR(inode))
-                        return ERR_CAST(inode);
-        }
+        inode = ino ? nilfs_iget(dir->i_sb, NILFS_I(dir)->i_root, ino) : NULL;
         return d_splice_alias(inode, dentry);
 }
 
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index f02b9ad43a21..255d5e1c03b7 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -235,7 +235,7 @@ extern void nilfs_set_link(struct inode *, struct nilfs_dir_entry *,
                            struct page *, struct inode *);
 
 /* file.c */
-extern int nilfs_sync_file(struct file *, int);
+extern int nilfs_sync_file(struct file *, loff_t, loff_t, int);
 
 /* ioctl.c */
 long nilfs_ioctl(struct file *, unsigned int, unsigned long);
@@ -264,7 +264,7 @@ extern void nilfs_update_inode(struct inode *, struct buffer_head *);
 extern void nilfs_truncate(struct inode *);
 extern void nilfs_evict_inode(struct inode *);
 extern int nilfs_setattr(struct dentry *, struct iattr *);
-int nilfs_permission(struct inode *inode, int mask, unsigned int flags);
+int nilfs_permission(struct inode *inode, int mask);
 int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh);
 extern int nilfs_inode_dirty(struct inode *);
 int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty);
diff --git a/fs/ntfs/dir.c b/fs/ntfs/dir.c
index 0f48e7c5d9e1..99e36107ff60 100644
--- a/fs/ntfs/dir.c
+++ b/fs/ntfs/dir.c
@@ -1527,13 +1527,20 @@ static int ntfs_dir_open(struct inode *vi, struct file *filp)
  * this problem for now.  We do write the $BITMAP attribute if it is present
  * which is the important one for a directory so things are not too bad.
  */
-static int ntfs_dir_fsync(struct file *filp, int datasync)
+static int ntfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
+                          int datasync)
 {
         struct inode *bmp_vi, *vi = filp->f_mapping->host;
         int err, ret;
         ntfs_attr na;
 
         ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
+
+        err = filemap_write_and_wait_range(vi->i_mapping, start, end);
+        if (err)
+                return err;
+        mutex_lock(&vi->i_mutex);
+
         BUG_ON(!S_ISDIR(vi->i_mode));
         /* If the bitmap attribute inode is in memory sync it, too. */
         na.mft_no = vi->i_ino;
@@ -1555,6 +1562,7 @@ static int ntfs_dir_fsync(struct file *filp, int datasync)
         else
                 ntfs_warning(vi->i_sb, "Failed to f%ssync inode 0x%lx.  Error "
                                 "%u.", datasync ? "data" : "", vi->i_ino, -ret);
+        mutex_unlock(&vi->i_mutex);
         return ret;
 }
 
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index f4b1057abdd2..c587e2d27183 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -1832,9 +1832,8 @@ static ssize_t ntfs_file_buffered_write(struct kiocb *iocb,
          * fails again.
          */
         if (unlikely(NInoTruncateFailed(ni))) {
-                down_write(&vi->i_alloc_sem);
+                inode_dio_wait(vi);
                 err = ntfs_truncate(vi);
-                up_write(&vi->i_alloc_sem);
                 if (err || NInoTruncateFailed(ni)) {
                         if (!err)
                                 err = -EIO;
@@ -2153,12 +2152,19 @@ static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
  * with this inode but since we have no simple way of getting to them we ignore
  * this problem for now.
  */
-static int ntfs_file_fsync(struct file *filp, int datasync)
+static int ntfs_file_fsync(struct file *filp, loff_t start, loff_t end,
+                           int datasync)
 {
         struct inode *vi = filp->f_mapping->host;
         int err, ret = 0;
 
         ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
+
+        err = filemap_write_and_wait_range(vi->i_mapping, start, end);
+        if (err)
+                return err;
+        mutex_lock(&vi->i_mutex);
+
         BUG_ON(S_ISDIR(vi->i_mode));
         if (!datasync || !NInoNonResident(NTFS_I(vi)))
                 ret = __ntfs_write_inode(vi, 1);
@@ -2176,6 +2182,7 @@ static int ntfs_file_fsync(struct file *filp, int datasync)
         else
                 ntfs_warning(vi->i_sb, "Failed to f%ssync inode 0x%lx.  Error "
                                 "%u.", datasync ? "data" : "", vi->i_ino, -ret);
+        mutex_unlock(&vi->i_mutex);
         return ret;
 }
 
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index c05d6dcf77a4..1371487da955 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -2357,12 +2357,7 @@ static const char *es = "  Leaving inconsistent metadata.  Unmount and run "
  *
  * Returns 0 on success or -errno on error.
  *
- * Called with ->i_mutex held.  In all but one case ->i_alloc_sem is held for
- * writing.  The only case in the kernel where ->i_alloc_sem is not held is
- * mm/filemap.c::generic_file_buffered_write() where vmtruncate() is called
- * with the current i_size as the offset.  The analogous place in NTFS is in
- * fs/ntfs/file.c::ntfs_file_buffered_write() where we call vmtruncate() again
- * without holding ->i_alloc_sem.
+ * Called with ->i_mutex held.
  */
 int ntfs_truncate(struct inode *vi)
 {
@@ -2887,8 +2882,7 @@ void ntfs_truncate_vfs(struct inode *vi) {
  * We also abort all changes of user, group, and mode as we do not implement
  * the NTFS ACLs yet.
  *
- * Called with ->i_mutex held.  For the ATTR_SIZE (i.e. ->truncate) case, also
- * called with ->i_alloc_sem held for writing.
+ * Called with ->i_mutex held.
  */
 int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
 {
diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index e913ad130fdd..1cee970eb55a 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -290,14 +290,14 @@ static int ocfs2_set_acl(handle_t *handle,
         return ret;
 }
 
-int ocfs2_check_acl(struct inode *inode, int mask, unsigned int flags)
+int ocfs2_check_acl(struct inode *inode, int mask)
 {
         struct ocfs2_super *osb;
         struct buffer_head *di_bh = NULL;
         struct posix_acl *acl;
         int ret = -EAGAIN;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         osb = OCFS2_SB(inode->i_sb);
diff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h
index 4fe7c9cf4bfb..5c5d31f05853 100644
--- a/fs/ocfs2/acl.h
+++ b/fs/ocfs2/acl.h
@@ -26,7 +26,7 @@ struct ocfs2_acl_entry {
         __le32 e_id;
 };
 
-extern int ocfs2_check_acl(struct inode *, int, unsigned int);
+extern int ocfs2_check_acl(struct inode *, int);
 extern int ocfs2_acl_chmod(struct inode *);
 extern int ocfs2_init_acl(handle_t *, struct inode *, struct inode *,
                           struct buffer_head *, struct buffer_head *,
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index ac97bca282d2..c1efe939c774 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -551,9 +551,8 @@ bail:
 
 /*
  * ocfs2_dio_end_io is called by the dio core when a dio is finished.  We're
- * particularly interested in the aio/dio case.  Like the core uses
- * i_alloc_sem, we use the rw_lock DLM lock to protect io on one node from
- * truncation on another.
+ * particularly interested in the aio/dio case.  We use the rw_lock DLM lock
+ * to protect io on one node from truncation on another.
  */
 static void ocfs2_dio_end_io(struct kiocb *iocb,
                              loff_t offset,
@@ -568,10 +567,8 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
         /* this io's submitter should not have unlocked this before we could */
         BUG_ON(!ocfs2_iocb_is_rw_locked(iocb));
 
-        if (ocfs2_iocb_is_sem_locked(iocb)) {
-                up_read(&inode->i_alloc_sem);
+        if (ocfs2_iocb_is_sem_locked(iocb))
                 ocfs2_iocb_clear_sem_locked(iocb);
-        }
 
         ocfs2_iocb_clear_rw_locked(iocb);
 
@@ -580,6 +577,7 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
 
         if (is_async)
                 aio_complete(iocb, ret, 0);
+        inode_dio_done(inode);
 }
 
 /*
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index b1e35a392ca5..0fc2bd34039d 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -171,7 +171,8 @@ static int ocfs2_dir_release(struct inode *inode, struct file *file)
         return 0;
 }
 
-static int ocfs2_sync_file(struct file *file, int datasync)
+static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end,
+                           int datasync)
 {
         int err = 0;
         journal_t *journal;
@@ -184,6 +185,16 @@ static int ocfs2_sync_file(struct file *file, int datasync)
                               file->f_path.dentry->d_name.name,
                               (unsigned long long)datasync);
 
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+
+        /*
+         * Probably don't need the i_mutex at all in here, just putting it here
+         * to be consistent with how fsync used to be called, someone more
+         * familiar with the fs could possibly remove it.
+         */
+        mutex_lock(&inode->i_mutex);
         if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) {
                 /*
                  * We still have to flush drive's caches to get data to the
@@ -200,6 +211,7 @@ static int ocfs2_sync_file(struct file *file, int datasync)
 bail:
         if (err)
                 mlog_errno(err);
+        mutex_unlock(&inode->i_mutex);
 
         return (err < 0) ? -EIO : 0;
 }
@@ -1142,6 +1154,8 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
                 if (status)
                         goto bail_unlock;
 
+                inode_dio_wait(inode);
+
                 if (i_size_read(inode) > attr->ia_size) {
                         if (ocfs2_should_order_data(inode)) {
                                 status = ocfs2_begin_ordered_truncate(inode,
@@ -1279,11 +1293,11 @@ bail:
         return err;
 }
 
-int ocfs2_permission(struct inode *inode, int mask, unsigned int flags)
+int ocfs2_permission(struct inode *inode, int mask)
 {
         int ret;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         ret = ocfs2_inode_lock(inode, NULL, 0);
@@ -1293,7 +1307,7 @@ int ocfs2_permission(struct inode *inode, int mask, unsigned int flags)
                 goto out;
         }
 
-        ret = generic_permission(inode, mask, flags, ocfs2_check_acl);
+        ret = generic_permission(inode, mask);
 
         ocfs2_inode_unlock(inode, 0);
 out:
@@ -2236,9 +2250,8 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
         ocfs2_iocb_clear_sem_locked(iocb);
 
 relock:
-        /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
+        /* to match setattr's i_mutex -> rw_lock ordering */
         if (direct_io) {
-                down_read(&inode->i_alloc_sem);
                 have_alloc_sem = 1;
                 /* communicate with ocfs2_dio_end_io */
                 ocfs2_iocb_set_sem_locked(iocb);
@@ -2290,7 +2303,6 @@ relock:
          */
         if (direct_io && !can_do_direct) {
                 ocfs2_rw_unlock(inode, rw_level);
-                up_read(&inode->i_alloc_sem);
 
                 have_alloc_sem = 0;
                 rw_level = -1;
@@ -2361,8 +2373,7 @@ out_dio:
         /*
          * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
          * function pointer which is called when o_direct io completes so that
-         * it can unlock our rw lock.  (it's the clustered equivalent of
-         * i_alloc_sem; protects truncate from racing with pending ios).
+         * it can unlock our rw lock.
          * Unfortunately there are error cases which call end_io and others
          * that don't.  so we don't have to unlock the rw_lock if either an
          * async dio is going to do it in the future or an end_io after an
@@ -2378,10 +2389,8 @@ out:
                 ocfs2_rw_unlock(inode, rw_level);
 
 out_sems:
-        if (have_alloc_sem) {
-                up_read(&inode->i_alloc_sem);
+        if (have_alloc_sem)
                 ocfs2_iocb_clear_sem_locked(iocb);
-        }
 
         mutex_unlock(&inode->i_mutex);
 
@@ -2531,7 +2540,6 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
          * need locks to protect pending reads from racing with truncate.
          */
         if (filp->f_flags & O_DIRECT) {
-                down_read(&inode->i_alloc_sem);
                 have_alloc_sem = 1;
                 ocfs2_iocb_set_sem_locked(iocb);
 
@@ -2574,10 +2582,9 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
         }
 
 bail:
-        if (have_alloc_sem) {
-                up_read(&inode->i_alloc_sem);
+        if (have_alloc_sem)
                 ocfs2_iocb_clear_sem_locked(iocb);
-        }
+
         if (rw_level != -1)
                 ocfs2_rw_unlock(inode, rw_level);
 
@@ -2593,12 +2600,14 @@ const struct inode_operations ocfs2_file_iops = {
         .listxattr      = ocfs2_listxattr,
         .removexattr    = generic_removexattr,
         .fiemap         = ocfs2_fiemap,
+        .check_acl      = ocfs2_check_acl,
 };
 
 const struct inode_operations ocfs2_special_file_iops = {
         .setattr        = ocfs2_setattr,
         .getattr        = ocfs2_getattr,
         .permission     = ocfs2_permission,
+        .check_acl      = ocfs2_check_acl,
 };
 
 /*
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index f5afbbef6703..97bf761c9e7c 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -61,7 +61,7 @@ int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh,
 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
 int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
                   struct kstat *stat);
-int ocfs2_permission(struct inode *inode, int mask, unsigned int flags);
+int ocfs2_permission(struct inode *inode, int mask);
 
 int ocfs2_should_update_atime(struct inode *inode,
                               struct vfsmount *vfsmnt);
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index e5d738cd9cc0..33889dc52dd7 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -2498,4 +2498,5 @@ const struct inode_operations ocfs2_dir_iops = {
         .listxattr      = ocfs2_listxattr,
         .removexattr    = generic_removexattr,
         .fiemap         = ocfs2_fiemap,
+        .check_acl      = ocfs2_check_acl,
 };
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index ebfd3825f12a..cf7823382664 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -4368,25 +4368,6 @@ static inline int ocfs2_may_create(struct inode *dir, struct dentry *child)
         return inode_permission(dir, MAY_WRITE | MAY_EXEC);
 }
 
-/* copied from user_path_parent. */
-static int ocfs2_user_path_parent(const char __user *path,
-                                  struct nameidata *nd, char **name)
-{
-        char *s = getname(path);
-        int error;
-
-        if (IS_ERR(s))
-                return PTR_ERR(s);
-
-        error = kern_path_parent(s, nd);
-        if (error)
-                putname(s);
-        else
-                *name = s;
-
-        return error;
-}
-
 /**
  * ocfs2_vfs_reflink - Create a reference-counted link
  *
@@ -4460,10 +4441,8 @@ int ocfs2_reflink_ioctl(struct inode *inode,
                         bool preserve)
 {
         struct dentry *new_dentry;
-        struct nameidata nd;
-        struct path old_path;
+        struct path old_path, new_path;
         int error;
-        char *to = NULL;
 
         if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)))
                 return -EOPNOTSUPP;
@@ -4474,39 +4453,33 @@ int ocfs2_reflink_ioctl(struct inode *inode,
                 return error;
         }
 
-        error = ocfs2_user_path_parent(newname, &nd, &to);
-        if (error) {
+        new_dentry = user_path_create(AT_FDCWD, newname, &new_path, 0);
+        error = PTR_ERR(new_dentry);
+        if (IS_ERR(new_dentry)) {
                 mlog_errno(error);
                 goto out;
         }
 
         error = -EXDEV;
-        if (old_path.mnt != nd.path.mnt)
-                goto out_release;
-        new_dentry = lookup_create(&nd, 0);
-        error = PTR_ERR(new_dentry);
-        if (IS_ERR(new_dentry)) {
+        if (old_path.mnt != new_path.mnt) {
                 mlog_errno(error);
-                goto out_unlock;
+                goto out_dput;
         }
 
-        error = mnt_want_write(nd.path.mnt);
+        error = mnt_want_write(new_path.mnt);
         if (error) {
                 mlog_errno(error);
                 goto out_dput;
         }
 
         error = ocfs2_vfs_reflink(old_path.dentry,
-                                  nd.path.dentry->d_inode,
+                                  new_path.dentry->d_inode,
                                   new_dentry, preserve);
-        mnt_drop_write(nd.path.mnt);
+        mnt_drop_write(new_path.mnt);
 out_dput:
         dput(new_dentry);
-out_unlock:
-        mutex_unlock(&nd.path.dentry->d_inode->i_mutex);
-out_release:
-        path_put(&nd.path);
-        putname(to);
+        mutex_unlock(&new_path.dentry->d_inode->i_mutex);
+        path_put(&new_path);
 out:
         path_put(&old_path);
 
diff --git a/fs/open.c b/fs/open.c
index b52cf013ffa1..739b751aa73e 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -793,7 +793,7 @@ out:
         return nd->intent.open.file;
 out_err:
         release_open_intent(nd);
-        nd->intent.open.file = (struct file *)dentry;
+        nd->intent.open.file = ERR_CAST(dentry);
         goto out;
 }
 EXPORT_SYMBOL_GPL(lookup_instantiate_filp);
diff --git a/fs/proc/base.c b/fs/proc/base.c
index c47719aaadef..91fb655a5cbf 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -673,7 +673,7 @@ static int mounts_open_common(struct inode *inode, struct file *file,
         p->m.private = p;
         p->ns = ns;
         p->root = root;
-        p->event = ns->event;
+        p->m.poll_event = ns->event;
 
         return 0;
 
@@ -2167,9 +2167,9 @@ static const struct file_operations proc_fd_operations = {
  * /proc/pid/fd needs a special permission handler so that a process can still
  * access /proc/self/fd after it has executed a setuid().
  */
-static int proc_fd_permission(struct inode *inode, int mask, unsigned int flags)
+static int proc_fd_permission(struct inode *inode, int mask)
 {
-        int rv = generic_permission(inode, mask, flags, NULL);
+        int rv = generic_permission(inode, mask);
         if (rv == 0)
                 return 0;
         if (task_pid(current) == proc_pid(inode))
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index d167de365a8d..1a77dbef226f 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -294,7 +294,7 @@ out:
         return ret;
 }
 
-static int proc_sys_permission(struct inode *inode, int mask,unsigned int flags)
+static int proc_sys_permission(struct inode *inode, int mask)
 {
         /*
          * sysctl entries that are not writeable,
@@ -316,7 +316,7 @@ static int proc_sys_permission(struct inode *inode, int mask,unsigned int flags)
         if (!table) /* global root - r-xr-xr-x */
                 error = mask & MAY_WRITE ? -EACCES : 0;
         else /* Use the permissions on the sysctl table entry */
-                error = sysctl_perm(head->root, table, mask);
+                error = sysctl_perm(head->root, table, mask & ~MAY_NOT_BLOCK);
 
         sysctl_head_finish(head);
         return error;
diff --git a/fs/read_write.c b/fs/read_write.c
index 5520f8ad5504..5907b49e4d7e 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -64,6 +64,23 @@ generic_file_llseek_unlocked(struct file *file, loff_t offset, int origin)
                         return file->f_pos;
                 offset += file->f_pos;
                 break;
+        case SEEK_DATA:
+                /*
+                 * 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 >= inode->i_size)
+                        return -ENXIO;
+                break;
+        case SEEK_HOLE:
+                /*
+                 * 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 >= inode->i_size)
+                        return -ENXIO;
+                offset = inode->i_size;
+                break;
         }
 
         if (offset < 0 && !unsigned_offsets(file))
@@ -128,12 +145,13 @@ EXPORT_SYMBOL(no_llseek);
 
 loff_t default_llseek(struct file *file, loff_t offset, int origin)
 {
+        struct inode *inode = file->f_path.dentry->d_inode;
         loff_t retval;
 
-        mutex_lock(&file->f_dentry->d_inode->i_mutex);
+        mutex_lock(&inode->i_mutex);
         switch (origin) {
                 case SEEK_END:
-                        offset += i_size_read(file->f_path.dentry->d_inode);
+                        offset += i_size_read(inode);
                         break;
                 case SEEK_CUR:
                         if (offset == 0) {
@@ -141,6 +159,26 @@ loff_t default_llseek(struct file *file, loff_t offset, int origin)
                                 goto out;
                         }
                         offset += file->f_pos;
+                        break;
+                case SEEK_DATA:
+                        /*
+                         * 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 >= inode->i_size)
+                                return -ENXIO;
+                        break;
+                case SEEK_HOLE:
+                        /*
+                         * 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 >= inode->i_size)
+                                return -ENXIO;
+                        offset = inode->i_size;
+                        break;
         }
         retval = -EINVAL;
         if (offset >= 0 || unsigned_offsets(file)) {
@@ -151,7 +189,7 @@ loff_t default_llseek(struct file *file, loff_t offset, int origin)
                 retval = offset;
         }
 out:
-        mutex_unlock(&file->f_dentry->d_inode->i_mutex);
+        mutex_unlock(&inode->i_mutex);
         return retval;
 }
 EXPORT_SYMBOL(default_llseek);
diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c
index 198dabf1b2bb..133e9355dc6f 100644
--- a/fs/reiserfs/dir.c
+++ b/fs/reiserfs/dir.c
@@ -14,7 +14,8 @@
 extern const struct reiserfs_key MIN_KEY;
 
 static int reiserfs_readdir(struct file *, void *, filldir_t);
-static int reiserfs_dir_fsync(struct file *filp, int datasync);
+static int reiserfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
+                              int datasync);
 
 const struct file_operations reiserfs_dir_operations = {
         .llseek = generic_file_llseek,
@@ -27,13 +28,21 @@ const struct file_operations reiserfs_dir_operations = {
 #endif
 };
 
-static int reiserfs_dir_fsync(struct file *filp, int datasync)
+static int reiserfs_dir_fsync(struct file *filp, loff_t start, loff_t end,
+                              int datasync)
 {
         struct inode *inode = filp->f_mapping->host;
         int err;
+
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+
+        mutex_lock(&inode->i_mutex);
         reiserfs_write_lock(inode->i_sb);
         err = reiserfs_commit_for_inode(inode);
         reiserfs_write_unlock(inode->i_sb);
+        mutex_unlock(&inode->i_mutex);
         if (err < 0)
                 return err;
         return 0;
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 91f080cc76c8..c7156dc39ce7 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -140,12 +140,18 @@ static void reiserfs_vfs_truncate_file(struct inode *inode)
  * be removed...
  */
 
-static int reiserfs_sync_file(struct file *filp, int datasync)
+static int reiserfs_sync_file(struct file *filp, loff_t start, loff_t end,
+                              int datasync)
 {
         struct inode *inode = filp->f_mapping->host;
         int err;
         int barrier_done;
 
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+
+        mutex_lock(&inode->i_mutex);
         BUG_ON(!S_ISREG(inode->i_mode));
         err = sync_mapping_buffers(inode->i_mapping);
         reiserfs_write_lock(inode->i_sb);
@@ -153,6 +159,7 @@ static int reiserfs_sync_file(struct file *filp, int datasync)
         reiserfs_write_unlock(inode->i_sb);
         if (barrier_done != 1 && reiserfs_barrier_flush(inode->i_sb))
                 blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
+        mutex_unlock(&inode->i_mutex);
         if (barrier_done < 0)
                 return barrier_done;
         return (err < 0) ? -EIO : 0;
@@ -312,4 +319,5 @@ const struct inode_operations reiserfs_file_inode_operations = {
         .listxattr = reiserfs_listxattr,
         .removexattr = reiserfs_removexattr,
         .permission = reiserfs_permission,
+        .check_acl = reiserfs_check_acl,
 };
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 4fd5bb33dbb5..2922b90ceac1 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -3068,9 +3068,8 @@ static ssize_t reiserfs_direct_IO(int rw, struct kiocb *iocb,
         struct inode *inode = file->f_mapping->host;
         ssize_t ret;
 
-        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
-                                  offset, nr_segs,
-                                  reiserfs_get_blocks_direct_io, NULL);
+        ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
+                                  reiserfs_get_blocks_direct_io);
 
         /*
          * In case of error extending write may have instantiated a few
@@ -3114,6 +3113,9 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
                         error = -EFBIG;
                         goto out;
                 }
+
+                inode_dio_wait(inode);
+
                 /* fill in hole pointers in the expanding truncate case. */
                 if (attr->ia_size > inode->i_size) {
                         error = generic_cont_expand_simple(inode, attr->ia_size);
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 118662690cdf..551f1b79dbc4 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -1529,6 +1529,7 @@ const struct inode_operations reiserfs_dir_inode_operations = {
         .listxattr = reiserfs_listxattr,
         .removexattr = reiserfs_removexattr,
         .permission = reiserfs_permission,
+        .check_acl = reiserfs_check_acl,
 };
 
 /*
@@ -1545,6 +1546,7 @@ const struct inode_operations reiserfs_symlink_inode_operations = {
         .listxattr = reiserfs_listxattr,
         .removexattr = reiserfs_removexattr,
         .permission = reiserfs_permission,
+        .check_acl = reiserfs_check_acl,
 
 };
 
@@ -1558,5 +1560,5 @@ const struct inode_operations reiserfs_special_inode_operations = {
         .listxattr = reiserfs_listxattr,
         .removexattr = reiserfs_removexattr,
         .permission = reiserfs_permission,
-
+        .check_acl = reiserfs_check_acl,
 };
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index aa91089162cb..14363b96b6af 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1643,6 +1643,7 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
         /* Set default values for options: non-aggressive tails, RO on errors */
         REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
         REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
+        REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_BARRIER_FLUSH);
         /* no preallocation minimum, be smart in
            reiserfs_file_write instead */
         REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index d78089690965..6938d8c68d6e 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -555,11 +555,10 @@ reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th,
 
                 reiserfs_write_unlock(inode->i_sb);
                 mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_XATTR);
-                down_write(&dentry->d_inode->i_alloc_sem);
+                inode_dio_wait(dentry->d_inode);
                 reiserfs_write_lock(inode->i_sb);
 
                 err = reiserfs_setattr(dentry, &newattrs);
-                up_write(&dentry->d_inode->i_alloc_sem);
                 mutex_unlock(&dentry->d_inode->i_mutex);
         } else
                 update_ctime(inode);
@@ -868,12 +867,18 @@ out:
         return err;
 }
 
-static int reiserfs_check_acl(struct inode *inode, int mask, unsigned int flags)
+int reiserfs_check_acl(struct inode *inode, int mask)
 {
         struct posix_acl *acl;
         int error = -EAGAIN; /* do regular unix permission checks by default */
 
-        if (flags & IPERM_FLAG_RCU)
+        /*
+         * Stat data v1 doesn't support ACLs.
+         */
+        if (get_inode_sd_version(inode) == STAT_DATA_V1)
+                return -EAGAIN;
+
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
@@ -952,7 +957,7 @@ static int xattr_mount_check(struct super_block *s)
         return 0;
 }
 
-int reiserfs_permission(struct inode *inode, int mask, unsigned int flags)
+int reiserfs_permission(struct inode *inode, int mask)
 {
         /*
          * We don't do permission checks on the internal objects.
@@ -961,15 +966,7 @@ int reiserfs_permission(struct inode *inode, int mask, unsigned int flags)
         if (IS_PRIVATE(inode))
                 return 0;
 
-#ifdef CONFIG_REISERFS_FS_XATTR
-        /*
-         * Stat data v1 doesn't support ACLs.
-         */
-        if (get_inode_sd_version(inode) != STAT_DATA_V1)
-                return generic_permission(inode, mask, flags,
-                                        reiserfs_check_acl);
-#endif
-        return generic_permission(inode, mask, flags, NULL);
+        return generic_permission(inode, mask);
 }
 
 static int xattr_hide_revalidate(struct dentry *dentry, struct nameidata *nd)
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c
index 4bc63ac64bc0..0682b38d7e31 100644
--- a/fs/squashfs/namei.c
+++ b/fs/squashfs/namei.c
@@ -220,11 +220,6 @@ static struct dentry *squashfs_lookup(struct inode *dir, struct dentry *dentry,
                                         blk, off, ino_num);
 
                                 inode = squashfs_iget(dir->i_sb, ino, ino_num);
-                                if (IS_ERR(inode)) {
-                                        err = PTR_ERR(inode);
-                                        goto failed;
-                                }
-
                                 goto exit_lookup;
                         }
                 }
@@ -232,10 +227,7 @@ static struct dentry *squashfs_lookup(struct inode *dir, struct dentry *dentry,
 
 exit_lookup:
         kfree(dire);
-        if (inode)
-                return d_splice_alias(inode, dentry);
-        d_add(dentry, inode);
-        return ERR_PTR(0);
+        return d_splice_alias(inode, dentry);
 
 data_error:
         err = -EIO;
diff --git a/fs/super.c b/fs/super.c
index ab3d672db0de..7943f04cb3a9 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -38,6 +38,69 @@
 LIST_HEAD(super_blocks);
 DEFINE_SPINLOCK(sb_lock);
 
+/*
+ * One thing we have to be careful of with a per-sb shrinker is that we don't
+ * drop the last active reference to the superblock from within the shrinker.
+ * If that happens we could trigger unregistering the shrinker from within the
+ * shrinker path and that leads to deadlock on the shrinker_rwsem. Hence we
+ * take a passive reference to the superblock to avoid this from occurring.
+ */
+static int prune_super(struct shrinker *shrink, struct shrink_control *sc)
+{
+        struct super_block *sb;
+        int     fs_objects = 0;
+        int     total_objects;
+
+        sb = container_of(shrink, struct super_block, s_shrink);
+
+        /*
+         * Deadlock avoidance.  We may hold various FS locks, and we don't want
+         * to recurse into the FS that called us in clear_inode() and friends..
+         */
+        if (sc->nr_to_scan && !(sc->gfp_mask & __GFP_FS))
+                return -1;
+
+        if (!grab_super_passive(sb))
+                return -1;
+
+        if (sb->s_op && sb->s_op->nr_cached_objects)
+                fs_objects = sb->s_op->nr_cached_objects(sb);
+
+        total_objects = sb->s_nr_dentry_unused +
+                        sb->s_nr_inodes_unused + fs_objects + 1;
+
+        if (sc->nr_to_scan) {
+                int     dentries;
+                int     inodes;
+
+                /* proportion the scan between the caches */
+                dentries = (sc->nr_to_scan * sb->s_nr_dentry_unused) /
+                                                        total_objects;
+                inodes = (sc->nr_to_scan * sb->s_nr_inodes_unused) /
+                                                        total_objects;
+                if (fs_objects)
+                        fs_objects = (sc->nr_to_scan * fs_objects) /
+                                                        total_objects;
+                /*
+                 * prune the dcache first as the icache is pinned by it, then
+                 * prune the icache, followed by the filesystem specific caches
+                 */
+                prune_dcache_sb(sb, dentries);
+                prune_icache_sb(sb, inodes);
+
+                if (fs_objects && sb->s_op->free_cached_objects) {
+                        sb->s_op->free_cached_objects(sb, fs_objects);
+                        fs_objects = sb->s_op->nr_cached_objects(sb);
+                }
+                total_objects = sb->s_nr_dentry_unused +
+                                sb->s_nr_inodes_unused + fs_objects;
+        }
+
+        total_objects = (total_objects / 100) * sysctl_vfs_cache_pressure;
+        drop_super(sb);
+        return total_objects;
+}
+
 /**
  *      alloc_super     -       create new superblock
  *      @type:  filesystem type superblock should belong to
@@ -77,6 +140,8 @@ static struct super_block *alloc_super(struct file_system_type *type)
                 INIT_HLIST_BL_HEAD(&s->s_anon);
                 INIT_LIST_HEAD(&s->s_inodes);
                 INIT_LIST_HEAD(&s->s_dentry_lru);
+                INIT_LIST_HEAD(&s->s_inode_lru);
+                spin_lock_init(&s->s_inode_lru_lock);
                 init_rwsem(&s->s_umount);
                 mutex_init(&s->s_lock);
                 lockdep_set_class(&s->s_umount, &type->s_umount_key);
@@ -114,6 +179,10 @@ static struct super_block *alloc_super(struct file_system_type *type)
                 s->s_op = &default_op;
                 s->s_time_gran = 1000000000;
                 s->cleancache_poolid = -1;
+
+                s->s_shrink.seeks = DEFAULT_SEEKS;
+                s->s_shrink.shrink = prune_super;
+                s->s_shrink.batch = 1024;
         }
 out:
         return s;
@@ -181,6 +250,10 @@ void deactivate_locked_super(struct super_block *s)
         if (atomic_dec_and_test(&s->s_active)) {
                 cleancache_flush_fs(s);
                 fs->kill_sb(s);
+
+                /* caches are now gone, we can safely kill the shrinker now */
+                unregister_shrinker(&s->s_shrink);
+
                 /*
                  * We need to call rcu_barrier so all the delayed rcu free
                  * inodes are flushed before we release the fs module.
@@ -241,6 +314,39 @@ static int grab_super(struct super_block *s) __releases(sb_lock)
 }
 
 /*
+ *      grab_super_passive - acquire a passive reference
+ *      @s: reference we are trying to grab
+ *
+ *      Tries to acquire a passive reference. This is used in places where we
+ *      cannot take an active reference but we need to ensure that the
+ *      superblock does not go away while we are working on it. It returns
+ *      false if a reference was not gained, and returns true with the s_umount
+ *      lock held in read mode if a reference is gained. On successful return,
+ *      the caller must drop the s_umount lock and the passive reference when
+ *      done.
+ */
+bool grab_super_passive(struct super_block *sb)
+{
+        spin_lock(&sb_lock);
+        if (list_empty(&sb->s_instances)) {
+                spin_unlock(&sb_lock);
+                return false;
+        }
+
+        sb->s_count++;
+        spin_unlock(&sb_lock);
+
+        if (down_read_trylock(&sb->s_umount)) {
+                if (sb->s_root)
+                        return true;
+                up_read(&sb->s_umount);
+        }
+
+        put_super(sb);
+        return false;
+}
+
+/*
  * Superblock locking.  We really ought to get rid of these two.
  */
 void lock_super(struct super_block * sb)
@@ -276,7 +382,6 @@ void generic_shutdown_super(struct super_block *sb)
 {
         const struct super_operations *sop = sb->s_op;
 
-
         if (sb->s_root) {
                 shrink_dcache_for_umount(sb);
                 sync_filesystem(sb);
@@ -364,6 +469,7 @@ retry:
         list_add(&s->s_instances, &type->fs_supers);
         spin_unlock(&sb_lock);
         get_filesystem(type);
+        register_shrinker(&s->s_shrink);
         return s;
 }
 
@@ -452,6 +558,42 @@ void iterate_supers(void (*f)(struct super_block *, void *), void *arg)
 }
 
 /**
+ *      iterate_supers_type - call function for superblocks of given type
+ *      @type: fs type
+ *      @f: function to call
+ *      @arg: argument to pass to it
+ *
+ *      Scans the superblock list and calls given function, passing it
+ *      locked superblock and given argument.
+ */
+void iterate_supers_type(struct file_system_type *type,
+        void (*f)(struct super_block *, void *), void *arg)
+{
+        struct super_block *sb, *p = NULL;
+
+        spin_lock(&sb_lock);
+        list_for_each_entry(sb, &type->fs_supers, s_instances) {
+                sb->s_count++;
+                spin_unlock(&sb_lock);
+
+                down_read(&sb->s_umount);
+                if (sb->s_root)
+                        f(sb, arg);
+                up_read(&sb->s_umount);
+
+                spin_lock(&sb_lock);
+                if (p)
+                        __put_super(p);
+                p = sb;
+        }
+        if (p)
+                __put_super(p);
+        spin_unlock(&sb_lock);
+}
+
+EXPORT_SYMBOL(iterate_supers_type);
+
+/**
  *      get_super - get the superblock of a device
  *      @bdev: device to get the superblock for
  *      
@@ -657,7 +799,7 @@ static DEFINE_IDA(unnamed_dev_ida);
 static DEFINE_SPINLOCK(unnamed_dev_lock);/* protects the above */
 static int unnamed_dev_start = 0; /* don't bother trying below it */
 
-int set_anon_super(struct super_block *s, void *data)
+int get_anon_bdev(dev_t *p)
 {
         int dev;
         int error;
@@ -684,24 +826,38 @@ int set_anon_super(struct super_block *s, void *data)
                 spin_unlock(&unnamed_dev_lock);
                 return -EMFILE;
         }
-        s->s_dev = MKDEV(0, dev & MINORMASK);
-        s->s_bdi = &noop_backing_dev_info;
+        *p = MKDEV(0, dev & MINORMASK);
         return 0;
 }
+EXPORT_SYMBOL(get_anon_bdev);
 
-EXPORT_SYMBOL(set_anon_super);
-
-void kill_anon_super(struct super_block *sb)
+void free_anon_bdev(dev_t dev)
 {
-        int slot = MINOR(sb->s_dev);
-
-        generic_shutdown_super(sb);
+        int slot = MINOR(dev);
         spin_lock(&unnamed_dev_lock);
         ida_remove(&unnamed_dev_ida, slot);
         if (slot < unnamed_dev_start)
                 unnamed_dev_start = slot;
         spin_unlock(&unnamed_dev_lock);
 }
+EXPORT_SYMBOL(free_anon_bdev);
+
+int set_anon_super(struct super_block *s, void *data)
+{
+        int error = get_anon_bdev(&s->s_dev);
+        if (!error)
+                s->s_bdi = &noop_backing_dev_info;
+        return error;
+}
+
+EXPORT_SYMBOL(set_anon_super);
+
+void kill_anon_super(struct super_block *sb)
+{
+        dev_t dev = sb->s_dev;
+        generic_shutdown_super(sb);
+        free_anon_bdev(dev);
+}
 
 EXPORT_SYMBOL(kill_anon_super);
 
diff --git a/fs/sync.c b/fs/sync.c
index c38ec163da6c..c98a7477edfd 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -165,28 +165,9 @@ SYSCALL_DEFINE1(syncfs, int, fd)
  */
 int vfs_fsync_range(struct file *file, loff_t start, loff_t end, int datasync)
 {
-        struct address_space *mapping = file->f_mapping;
-        int err, ret;
-
-        if (!file->f_op || !file->f_op->fsync) {
-                ret = -EINVAL;
-                goto out;
-        }
-
-        ret = filemap_write_and_wait_range(mapping, start, end);
-
-        /*
-         * We need to protect against concurrent writers, which could cause
-         * livelocks in fsync_buffers_list().
-         */
-        mutex_lock(&mapping->host->i_mutex);
-        err = file->f_op->fsync(file, datasync);
-        if (!ret)
-                ret = err;
-        mutex_unlock(&mapping->host->i_mutex);
-
-out:
-        return ret;
+        if (!file->f_op || !file->f_op->fsync)
+                return -EINVAL;
+        return file->f_op->fsync(file, start, end, datasync);
 }
 EXPORT_SYMBOL(vfs_fsync_range);
 
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 0a12eb89cd32..e3f091a81c72 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -349,11 +349,11 @@ int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, const cha
                 return -ENOENT;
 }
 
-int sysfs_permission(struct inode *inode, int mask, unsigned int flags)
+int sysfs_permission(struct inode *inode, int mask)
 {
         struct sysfs_dirent *sd;
 
-        if (flags & IPERM_FLAG_RCU)
+        if (mask & MAY_NOT_BLOCK)
                 return -ECHILD;
 
         sd = inode->i_private;
@@ -362,5 +362,5 @@ int sysfs_permission(struct inode *inode, int mask, unsigned int flags)
         sysfs_refresh_inode(sd, inode);
         mutex_unlock(&sysfs_mutex);
 
-        return generic_permission(inode, mask, flags, NULL);
+        return generic_permission(inode, mask);
 }
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 2ed2404f3113..845ab3ad229d 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -201,7 +201,7 @@ static inline void __sysfs_put(struct sysfs_dirent *sd)
 struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd);
 void sysfs_evict_inode(struct inode *inode);
 int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr);
-int sysfs_permission(struct inode *inode, int mask, unsigned int flags);
+int sysfs_permission(struct inode *inode, int mask);
 int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
 int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
 int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 7cf738a4544d..f9c234bf33d3 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1304,7 +1304,7 @@ static void *ubifs_follow_link(struct dentry *dentry, struct nameidata *nd)
         return NULL;
 }
 
-int ubifs_fsync(struct file *file, int datasync)
+int ubifs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
         struct inode *inode = file->f_mapping->host;
         struct ubifs_info *c = inode->i_sb->s_fs_info;
@@ -1319,14 +1319,16 @@ int ubifs_fsync(struct file *file, int datasync)
                  */
                 return 0;
 
-        /*
-         * VFS has already synchronized dirty pages for this inode. Synchronize
-         * the inode unless this is a 'datasync()' call.
-         */
+        err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (err)
+                return err;
+        mutex_lock(&inode->i_mutex);
+
+        /* Synchronize the inode unless this is a 'datasync()' call. */
         if (!datasync || (inode->i_state & I_DIRTY_DATASYNC)) {
                 err = inode->i_sb->s_op->write_inode(inode, NULL);
                 if (err)
-                        return err;
+                        goto out;
         }
 
         /*
@@ -1334,10 +1336,9 @@ int ubifs_fsync(struct file *file, int datasync)
          * them.
          */
         err = ubifs_sync_wbufs_by_inode(c, inode);
-        if (err)
-                return err;
-
-        return 0;
+out:
+        mutex_unlock(&inode->i_mutex);
+        return err;
 }
 
 /**
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 702b79258e30..27f22551f805 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -1729,7 +1729,7 @@ const struct ubifs_lprops *ubifs_fast_find_frdi_idx(struct ubifs_info *c);
 int ubifs_calc_dark(const struct ubifs_info *c, int spc);
 
 /* file.c */
-int ubifs_fsync(struct file *file, int datasync);
+int ubifs_fsync(struct file *file, loff_t start, loff_t end, int datasync);
 int ubifs_setattr(struct dentry *dentry, struct iattr *attr);
 
 /* dir.c */
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 2a346bb1d9f5..d8ffa7cc661d 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -150,7 +150,7 @@ long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
         long old_block, new_block;
         int result = -EINVAL;
 
-        if (file_permission(filp, MAY_READ) != 0) {
+        if (inode_permission(inode, MAY_READ) != 0) {
                 udf_debug("no permission to access inode %lu\n", inode->i_ino);
                 result = -EPERM;
                 goto out;
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index b57aab9a1184..639d49162241 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -59,8 +59,6 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, stru
         if (ino)
                 inode = ufs_iget(dir->i_sb, ino);
         unlock_ufs(dir->i_sb);
-        if (IS_ERR(inode))
-                return ERR_CAST(inode);
         return d_splice_alias(inode, dentry);
 }
 
diff --git a/fs/xfs/linux-2.6/xfs_acl.c b/fs/xfs/linux-2.6/xfs_acl.c
index 115ac6919533..cac48fe22ad5 100644
--- a/fs/xfs/linux-2.6/xfs_acl.c
+++ b/fs/xfs/linux-2.6/xfs_acl.c
@@ -219,7 +219,7 @@ xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
 }
 
 int
-xfs_check_acl(struct inode *inode, int mask, unsigned int flags)
+xfs_check_acl(struct inode *inode, int mask)
 {
         struct xfs_inode *ip;
         struct posix_acl *acl;
@@ -235,7 +235,7 @@ xfs_check_acl(struct inode *inode, int mask, unsigned int flags)
         if (!XFS_IFORK_Q(ip))
                 return -EAGAIN;
 
-        if (flags & IPERM_FLAG_RCU) {
+        if (mask & MAY_NOT_BLOCK) {
                 if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
                         return -ECHILD;
                 return -EAGAIN;
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 26384fe3f26d..63e971e2b837 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1329,6 +1329,9 @@ xfs_end_io_direct_write(
         } else {
                 xfs_finish_ioend_sync(ioend);
         }
+
+        /* XXX: probably should move into the real I/O completion handler */
+        inode_dio_done(ioend->io_inode);
 }
 
 STATIC ssize_t
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index 8073f61efb8e..cca00f49e092 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -127,6 +127,8 @@ xfs_iozero(
 STATIC int
 xfs_file_fsync(
         struct file             *file,
+        loff_t                  start,
+        loff_t                  end,
         int                     datasync)
 {
         struct inode            *inode = file->f_mapping->host;
@@ -138,6 +140,10 @@ xfs_file_fsync(
 
         trace_xfs_file_fsync(ip);
 
+        error = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (error)
+                return error;
+
         if (XFS_FORCED_SHUTDOWN(mp))
                 return -XFS_ERROR(EIO);
 
@@ -875,18 +881,11 @@ xfs_file_aio_write(
         /* Handle various SYNC-type writes */
         if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) {
                 loff_t end = pos + ret - 1;
-                int error, error2;
 
                 xfs_rw_iunlock(ip, iolock);
-                error = filemap_write_and_wait_range(mapping, pos, end);
+                ret = -xfs_file_fsync(file, pos, end,
+                                      (file->f_flags & __O_SYNC) ? 0 : 1);
                 xfs_rw_ilock(ip, iolock);
-
-                error2 = -xfs_file_fsync(file,
-                                         (file->f_flags & __O_SYNC) ? 0 : 1);
-                if (error)
-                        ret = error;
-                else if (error2)
-                        ret = error2;
         }
 
 out_unlock:
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 25fd2cd6c8b0..9a72dda58bd0 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1024,11 +1024,6 @@ xfs_fs_put_super(
 {
         struct xfs_mount        *mp = XFS_M(sb);
 
-        /*
-         * Unregister the memory shrinker before we tear down the mount
-         * structure so we don't have memory reclaim racing with us here.
-         */
-        xfs_inode_shrinker_unregister(mp);
         xfs_syncd_stop(mp);
 
         /*
@@ -1411,8 +1406,6 @@ xfs_fs_fill_super(
         sb->s_time_gran = 1;
         set_posix_acl_flag(sb);
 
-        xfs_inode_shrinker_register(mp);
-
         error = xfs_mountfs(mp);
         if (error)
                 goto out_filestream_unmount;
@@ -1439,7 +1432,6 @@ xfs_fs_fill_super(
         return 0;
 
  out_filestream_unmount:
-        xfs_inode_shrinker_unregister(mp);
         xfs_filestream_unmount(mp);
  out_free_sb:
         xfs_freesb(mp);
@@ -1458,8 +1450,6 @@ xfs_fs_fill_super(
  out_syncd_stop:
         xfs_syncd_stop(mp);
  out_unmount:
-        xfs_inode_shrinker_unregister(mp);
-
         /*
          * Blow away any referenced inode in the filestreams cache.
          * This can and will cause log traffic as inodes go inactive
@@ -1483,6 +1473,21 @@ xfs_fs_mount(
         return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
 }
 
+static int
+xfs_fs_nr_cached_objects(
+        struct super_block      *sb)
+{
+        return xfs_reclaim_inodes_count(XFS_M(sb));
+}
+
+static void
+xfs_fs_free_cached_objects(
+        struct super_block      *sb,
+        int                     nr_to_scan)
+{
+        xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan);
+}
+
 static const struct super_operations xfs_super_operations = {
         .alloc_inode            = xfs_fs_alloc_inode,
         .destroy_inode          = xfs_fs_destroy_inode,
@@ -1496,6 +1501,8 @@ static const struct super_operations xfs_super_operations = {
         .statfs                 = xfs_fs_statfs,
         .remount_fs             = xfs_fs_remount,
         .show_options           = xfs_fs_show_options,
+        .nr_cached_objects      = xfs_fs_nr_cached_objects,
+        .free_cached_objects    = xfs_fs_free_cached_objects,
 };
 
 static struct file_system_type xfs_fs_type = {
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index 5cc158e52d4c..e4c938afb910 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -179,6 +179,8 @@ restart:
                 if (error == EFSCORRUPTED)
                         break;
 
+                cond_resched();
+
         } while (nr_found && !done);
 
         if (skipped) {
@@ -984,6 +986,8 @@ restart:
 
                         *nr_to_scan -= XFS_LOOKUP_BATCH;
 
+                        cond_resched();
+
                 } while (nr_found && !done && *nr_to_scan > 0);
 
                 if (trylock && !done)
@@ -1001,7 +1005,7 @@ restart:
          * ensure that when we get more reclaimers than AGs we block rather
          * than spin trying to execute reclaim.
          */
-        if (trylock && skipped && *nr_to_scan > 0) {
+        if (skipped && (flags & SYNC_WAIT) && *nr_to_scan > 0) {
                 trylock = 0;
                 goto restart;
         }
@@ -1019,44 +1023,38 @@ xfs_reclaim_inodes(
 }
 
 /*
- * Inode cache shrinker.
+ * Scan a certain number of inodes for reclaim.
  *
  * When called we make sure that there is a background (fast) inode reclaim in
- * progress, while we will throttle the speed of reclaim via doiing synchronous
+ * progress, while we will throttle the speed of reclaim via doing synchronous
  * reclaim of inodes. That means if we come across dirty inodes, we wait for
  * them to be cleaned, which we hope will not be very long due to the
  * background walker having already kicked the IO off on those dirty inodes.
  */
-static int
-xfs_reclaim_inode_shrink(
-        struct shrinker *shrink,
-        struct shrink_control *sc)
+void
+xfs_reclaim_inodes_nr(
+        struct xfs_mount        *mp,
+        int                     nr_to_scan)
 {
-        struct xfs_mount *mp;
-        struct xfs_perag *pag;
-        xfs_agnumber_t  ag;
-        int             reclaimable;
-        int nr_to_scan = sc->nr_to_scan;
-        gfp_t gfp_mask = sc->gfp_mask;
-
-        mp = container_of(shrink, struct xfs_mount, m_inode_shrink);
-        if (nr_to_scan) {
-                /* kick background reclaimer and push the AIL */
-                xfs_syncd_queue_reclaim(mp);
-                xfs_ail_push_all(mp->m_ail);
+        /* kick background reclaimer and push the AIL */
+        xfs_syncd_queue_reclaim(mp);
+        xfs_ail_push_all(mp->m_ail);
 
-                if (!(gfp_mask & __GFP_FS))
-                        return -1;
+        xfs_reclaim_inodes_ag(mp, SYNC_TRYLOCK | SYNC_WAIT, &nr_to_scan);
+}
 
-                xfs_reclaim_inodes_ag(mp, SYNC_TRYLOCK | SYNC_WAIT,
-                                        &nr_to_scan);
-                /* terminate if we don't exhaust the scan */
-                if (nr_to_scan > 0)
-                        return -1;
-       }
+/*
+ * Return the number of reclaimable inodes in the filesystem for
+ * the shrinker to determine how much to reclaim.
+ */
+int
+xfs_reclaim_inodes_count(
+        struct xfs_mount        *mp)
+{
+        struct xfs_perag        *pag;
+        xfs_agnumber_t          ag = 0;
+        int                     reclaimable = 0;
 
-        reclaimable = 0;
-        ag = 0;
         while ((pag = xfs_perag_get_tag(mp, ag, XFS_ICI_RECLAIM_TAG))) {
                 ag = pag->pag_agno + 1;
                 reclaimable += pag->pag_ici_reclaimable;
@@ -1065,18 +1063,3 @@ xfs_reclaim_inode_shrink(
         return reclaimable;
 }
 
-void
-xfs_inode_shrinker_register(
-        struct xfs_mount        *mp)
-{
-        mp->m_inode_shrink.shrink = xfs_reclaim_inode_shrink;
-        mp->m_inode_shrink.seeks = DEFAULT_SEEKS;
-        register_shrinker(&mp->m_inode_shrink);
-}
-
-void
-xfs_inode_shrinker_unregister(
-        struct xfs_mount        *mp)
-{
-        unregister_shrinker(&mp->m_inode_shrink);
-}
diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h
index e914fd621746..941202e7ac6e 100644
--- a/fs/xfs/linux-2.6/xfs_sync.h
+++ b/fs/xfs/linux-2.6/xfs_sync.h
@@ -35,6 +35,8 @@ void xfs_quiesce_attr(struct xfs_mount *mp);
 void xfs_flush_inodes(struct xfs_inode *ip);
 
 int xfs_reclaim_inodes(struct xfs_mount *mp, int mode);
+int xfs_reclaim_inodes_count(struct xfs_mount *mp);
+void xfs_reclaim_inodes_nr(struct xfs_mount *mp, int nr_to_scan);
 
 void xfs_inode_set_reclaim_tag(struct xfs_inode *ip);
 void __xfs_inode_set_reclaim_tag(struct xfs_perag *pag, struct xfs_inode *ip);
@@ -46,7 +48,4 @@ int xfs_inode_ag_iterator(struct xfs_mount *mp,
         int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag, int flags),
         int flags);
 
-void xfs_inode_shrinker_register(struct xfs_mount *mp);
-void xfs_inode_shrinker_unregister(struct xfs_mount *mp);
-
 #endif
diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h
index 11dd72070cbb..0135e2a669d7 100644
--- a/fs/xfs/xfs_acl.h
+++ b/fs/xfs/xfs_acl.h
@@ -42,7 +42,7 @@ struct xfs_acl {
 #define SGI_ACL_DEFAULT_SIZE    (sizeof(SGI_ACL_DEFAULT)-1)
 
 #ifdef CONFIG_XFS_POSIX_ACL
-extern int xfs_check_acl(struct inode *inode, int mask, unsigned int flags);
+extern int xfs_check_acl(struct inode *inode, int mask);
 extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
 extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl);
 extern int xfs_acl_chmod(struct inode *inode);