From 454e2398be9b9fa30433fccc548db34d19aa9958 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Fri, 23 Jun 2006 02:02:57 -0700
Subject: [PATCH] VFS: Permit filesystem to override root dentry on mount

Extend the get_sb() filesystem operation to take an extra argument that
permits the VFS to pass in the target vfsmount that defines the mountpoint.

The filesystem is then required to manually set the superblock and root dentry
pointers.  For most filesystems, this should be done with simple_set_mnt()
which will set the superblock pointer and then set the root dentry to the
superblock's s_root (as per the old default behaviour).

The get_sb() op now returns an integer as there's now no need to return the
superblock pointer.

This patch permits a superblock to be implicitly shared amongst several mount
points, such as can be done with NFS to avoid potential inode aliasing.  In
such a case, simple_set_mnt() would not be called, and instead the mnt_root
and mnt_sb would be set directly.

The patch also makes the following changes:

 (*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
     pointer argument and return an integer, so most filesystems have to change
     very little.

 (*) If one of the convenience function is not used, then get_sb() should
     normally call simple_set_mnt() to instantiate the vfsmount. This will
     always return 0, and so can be tail-called from get_sb().

 (*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
     dcache upon superblock destruction rather than shrink_dcache_anon().

     This is required because the superblock may now have multiple trees that
     aren't actually bound to s_root, but that still need to be cleaned up. The
     currently called functions assume that the whole tree is rooted at s_root,
     and that anonymous dentries are not the roots of trees which results in
     dentries being left unculled.

     However, with the way NFS superblock sharing are currently set to be
     implemented, these assumptions are violated: the root of the filesystem is
     simply a dummy dentry and inode (the real inode for '/' may well be
     inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
     with child trees.

     [*] Anonymous until discovered from another tree.

 (*) The documentation has been adjusted, including the additional bit of
     changing ext2_* into foo_* in the documentation.

[akpm@osdl.org: convert ipath_fs, do other stuff]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 mm/shmem.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'mm/shmem.c')

diff --git a/mm/shmem.c b/mm/shmem.c
index 1e43c8a865ba..7617bb1c6bf7 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2233,10 +2233,10 @@ static struct vm_operations_struct shmem_vm_ops = {
 };
 
 
-static struct super_block *shmem_get_sb(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data)
+static int shmem_get_sb(struct file_system_type *fs_type,
+	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
 {
-	return get_sb_nodev(fs_type, flags, data, shmem_fill_super);
+	return get_sb_nodev(fs_type, flags, data, shmem_fill_super, mnt);
 }
 
 static struct file_system_type tmpfs_fs_type = {
-- 
cgit v1.2.3-58-ga151


From 726c334223180e3c0197cc980a432681370d4baf Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Fri, 23 Jun 2006 02:02:58 -0700
Subject: [PATCH] VFS: Permit filesystem to perform statfs with a known root
 dentry

Give the statfs superblock operation a dentry pointer rather than a superblock
pointer.

This complements the get_sb() patch.  That reduced the significance of
sb->s_root, allowing NFS to place a fake root there.  However, NFS does
require a dentry to use as a target for the statfs operation.  This permits
the root in the vfsmount to be used instead.

linux/mount.h has been added where necessary to make allyesconfig build
successfully.

Interest has also been expressed for use with the FUSE and XFS filesystems.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nathan Scott <nathans@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 Documentation/filesystems/Locking |  2 +-
 Documentation/filesystems/vfs.txt |  2 +-
 arch/alpha/kernel/osf_sys.c       |  2 +-
 arch/mips/kernel/sysirix.c        | 12 ++++++------
 arch/parisc/hpux/sys_hpux.c       | 10 +++++-----
 arch/sparc64/solaris/fs.c         |  4 ++--
 fs/adfs/super.c                   |  8 ++++----
 fs/affs/super.c                   |  5 +++--
 fs/befs/linuxvfs.c                |  5 +++--
 fs/bfs/inode.c                    |  3 ++-
 fs/cifs/cifsfs.c                  |  3 ++-
 fs/coda/inode.c                   |  6 +++---
 fs/coda/upcall.c                  |  4 ++--
 fs/compat.c                       |  8 ++++----
 fs/cramfs/inode.c                 |  4 +++-
 fs/efs/super.c                    |  6 +++---
 fs/ext2/super.c                   |  5 +++--
 fs/ext3/super.c                   |  5 +++--
 fs/fat/inode.c                    |  8 ++++----
 fs/freevxfs/vxfs_super.c          | 13 +++++++------
 fs/fuse/inode.c                   |  3 ++-
 fs/hfs/super.c                    |  4 +++-
 fs/hfsplus/super.c                |  4 +++-
 fs/hostfs/hostfs_kern.c           |  4 ++--
 fs/hpfs/super.c                   |  3 ++-
 fs/hppfs/hppfs_kern.c             |  2 +-
 fs/hugetlbfs/inode.c              |  4 ++--
 fs/isofs/inode.c                  |  6 ++++--
 fs/jffs/inode-v23.c               |  4 ++--
 fs/jffs2/fs.c                     |  4 ++--
 fs/jffs2/os-linux.h               |  2 +-
 fs/jfs/super.c                    |  4 ++--
 fs/libfs.c                        |  4 ++--
 fs/minix/inode.c                  | 10 +++++-----
 fs/ncpfs/inode.c                  |  5 +++--
 fs/nfs/inode.c                    |  5 +++--
 fs/nfsd/nfs4xdr.c                 |  2 +-
 fs/nfsd/vfs.c                     |  2 +-
 fs/ntfs/super.c                   |  7 ++++---
 fs/ocfs2/super.c                  | 10 +++++-----
 fs/open.c                         | 26 +++++++++++++-------------
 fs/qnx4/inode.c                   |  6 ++++--
 fs/reiserfs/super.c               |  8 ++++----
 fs/romfs/inode.c                  |  4 ++--
 fs/smbfs/inode.c                  |  6 +++---
 fs/smbfs/proc.c                   |  4 ++--
 fs/smbfs/proto.h                  |  2 +-
 fs/super.c                        |  2 +-
 fs/sysv/inode.c                   |  3 ++-
 fs/udf/super.c                    |  6 ++++--
 fs/ufs/super.c                    |  3 ++-
 fs/xfs/linux-2.6/xfs_super.c      |  4 ++--
 include/linux/coda_psdev.h        |  2 +-
 include/linux/fs.h                |  6 +++---
 include/linux/mount.h             |  5 +++++
 include/linux/security.h          | 14 +++++++-------
 kernel/acct.c                     |  2 +-
 mm/shmem.c                        |  4 ++--
 security/dummy.c                  |  2 +-
 security/selinux/hooks.c          |  6 +++---
 60 files changed, 175 insertions(+), 144 deletions(-)

(limited to 'mm/shmem.c')

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 3abf08f1b14a..d31efbbdfe50 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -99,7 +99,7 @@ prototypes:
 	int (*sync_fs)(struct super_block *sb, int wait);
 	void (*write_super_lockfs) (struct super_block *);
 	void (*unlockfs) (struct super_block *);
-	int (*statfs) (struct super_block *, struct kstatfs *);
+	int (*statfs) (struct dentry *, struct kstatfs *);
 	int (*remount_fs) (struct super_block *, int *, char *);
 	void (*clear_inode) (struct inode *);
 	void (*umount_begin) (struct super_block *);
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index dd7d0dcedc87..9d3aed628bc1 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -211,7 +211,7 @@ struct super_operations {
         int (*sync_fs)(struct super_block *sb, int wait);
         void (*write_super_lockfs) (struct super_block *);
         void (*unlockfs) (struct super_block *);
-        int (*statfs) (struct super_block *, struct kstatfs *);
+        int (*statfs) (struct dentry *, struct kstatfs *);
         int (*remount_fs) (struct super_block *, int *, char *);
         void (*clear_inode) (struct inode *);
         void (*umount_begin) (struct super_block *);
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 31afe3d91ac6..e15dcf4f3dcd 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -244,7 +244,7 @@ do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
 	      unsigned long bufsiz)
 {
 	struct kstatfs linux_stat;
-	int error = vfs_statfs(dentry->d_inode->i_sb, &linux_stat);
+	int error = vfs_statfs(dentry, &linux_stat);
 	if (!error)
 		error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
 	return error;	
diff --git a/arch/mips/kernel/sysirix.c b/arch/mips/kernel/sysirix.c
index 5407b784cd01..19e1ef43eb4b 100644
--- a/arch/mips/kernel/sysirix.c
+++ b/arch/mips/kernel/sysirix.c
@@ -694,7 +694,7 @@ asmlinkage int irix_statfs(const char __user *path,
 	if (error)
 		goto out;
 
-	error = vfs_statfs(nd.dentry->d_inode->i_sb, &kbuf);
+	error = vfs_statfs(nd.dentry, &kbuf);
 	if (error)
 		goto dput_and_out;
 
@@ -732,7 +732,7 @@ asmlinkage int irix_fstatfs(unsigned int fd, struct irix_statfs __user *buf)
 		goto out;
 	}
 
-	error = vfs_statfs(file->f_dentry->d_inode->i_sb, &kbuf);
+	error = vfs_statfs(file->f_dentry, &kbuf);
 	if (error)
 		goto out_f;
 
@@ -1360,7 +1360,7 @@ asmlinkage int irix_statvfs(char __user *fname, struct irix_statvfs __user *buf)
 	error = user_path_walk(fname, &nd);
 	if (error)
 		goto out;
-	error = vfs_statfs(nd.dentry->d_inode->i_sb, &kbuf);
+	error = vfs_statfs(nd.dentry, &kbuf);
 	if (error)
 		goto dput_and_out;
 
@@ -1406,7 +1406,7 @@ asmlinkage int irix_fstatvfs(int fd, struct irix_statvfs __user *buf)
 		error = -EBADF;
 		goto out;
 	}
-	error = vfs_statfs(file->f_dentry->d_inode->i_sb, &kbuf);
+	error = vfs_statfs(file->f_dentry, &kbuf);
 	if (error)
 		goto out_f;
 
@@ -1611,7 +1611,7 @@ asmlinkage int irix_statvfs64(char __user *fname, struct irix_statvfs64 __user *
 	error = user_path_walk(fname, &nd);
 	if (error)
 		goto out;
-	error = vfs_statfs(nd.dentry->d_inode->i_sb, &kbuf);
+	error = vfs_statfs(nd.dentry, &kbuf);
 	if (error)
 		goto dput_and_out;
 
@@ -1658,7 +1658,7 @@ asmlinkage int irix_fstatvfs64(int fd, struct irix_statvfs __user *buf)
 		error = -EBADF;
 		goto out;
 	}
-	error = vfs_statfs(file->f_dentry->d_inode->i_sb, &kbuf);
+	error = vfs_statfs(file->f_dentry, &kbuf);
 	if (error)
 		goto out_f;
 
diff --git a/arch/parisc/hpux/sys_hpux.c b/arch/parisc/hpux/sys_hpux.c
index 05273ccced0e..cb69727027ae 100644
--- a/arch/parisc/hpux/sys_hpux.c
+++ b/arch/parisc/hpux/sys_hpux.c
@@ -145,7 +145,7 @@ static int hpux_ustat(dev_t dev, struct hpux_ustat __user *ubuf)
 	s = user_get_super(dev);
 	if (s == NULL)
 		goto out;
-	err = vfs_statfs(s, &sbuf);
+	err = vfs_statfs(s->s_root, &sbuf);
 	drop_super(s);
 	if (err)
 		goto out;
@@ -186,12 +186,12 @@ struct hpux_statfs {
      int16_t f_pad;
 };
 
-static int vfs_statfs_hpux(struct super_block *sb, struct hpux_statfs *buf)
+static int vfs_statfs_hpux(struct dentry *dentry, struct hpux_statfs *buf)
 {
 	struct kstatfs st;
 	int retval;
 	
-	retval = vfs_statfs(sb, &st);
+	retval = vfs_statfs(dentry, &st);
 	if (retval)
 		return retval;
 
@@ -219,7 +219,7 @@ asmlinkage long hpux_statfs(const char __user *path,
 	error = user_path_walk(path, &nd);
 	if (!error) {
 		struct hpux_statfs tmp;
-		error = vfs_statfs_hpux(nd.dentry->d_inode->i_sb, &tmp);
+		error = vfs_statfs_hpux(nd.dentry, &tmp);
 		if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
 			error = -EFAULT;
 		path_release(&nd);
@@ -237,7 +237,7 @@ asmlinkage long hpux_fstatfs(unsigned int fd, struct hpux_statfs __user * buf)
 	file = fget(fd);
 	if (!file)
 		goto out;
-	error = vfs_statfs_hpux(file->f_dentry->d_inode->i_sb, &tmp);
+	error = vfs_statfs_hpux(file->f_dentry, &tmp);
 	if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
 		error = -EFAULT;
 	fput(file);
diff --git a/arch/sparc64/solaris/fs.c b/arch/sparc64/solaris/fs.c
index 4885ca6cbc77..0f0eb6aa1c40 100644
--- a/arch/sparc64/solaris/fs.c
+++ b/arch/sparc64/solaris/fs.c
@@ -356,7 +356,7 @@ static int report_statvfs(struct vfsmount *mnt, struct inode *inode, u32 buf)
 	int error;
 	struct sol_statvfs __user *ss = A(buf);
 
-	error = vfs_statfs(mnt->mnt_sb, &s);
+	error = vfs_statfs(mnt->mnt_root, &s);
 	if (!error) {
 		const char *p = mnt->mnt_sb->s_type->name;
 		int i = 0;
@@ -392,7 +392,7 @@ static int report_statvfs64(struct vfsmount *mnt, struct inode *inode, u32 buf)
 	int error;
 	struct sol_statvfs64 __user *ss = A(buf);
 			
-	error = vfs_statfs(mnt->mnt_sb, &s);
+	error = vfs_statfs(mnt->mnt_root, &s);
 	if (!error) {
 		const char *p = mnt->mnt_sb->s_type->name;
 		int i = 0;
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 1b58a9b7f6aa..ba1c88af49fe 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -196,17 +196,17 @@ static int adfs_remount(struct super_block *sb, int *flags, char *data)
 	return parse_options(sb, data);
 }
 
-static int adfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int adfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct adfs_sb_info *asb = ADFS_SB(sb);
+	struct adfs_sb_info *asb = ADFS_SB(dentry->d_sb);
 
 	buf->f_type    = ADFS_SUPER_MAGIC;
 	buf->f_namelen = asb->s_namelen;
-	buf->f_bsize   = sb->s_blocksize;
+	buf->f_bsize   = dentry->d_sb->s_blocksize;
 	buf->f_blocks  = asb->s_size;
 	buf->f_files   = asb->s_ids_per_zone * asb->s_map_size;
 	buf->f_bavail  =
-	buf->f_bfree   = adfs_map_free(sb);
+	buf->f_bfree   = adfs_map_free(dentry->d_sb);
 	buf->f_ffree   = (long)(buf->f_bfree * buf->f_files) / (long)buf->f_blocks;
 
 	return 0;
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 6a52e7875403..8765cba35bb9 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -18,7 +18,7 @@
 
 extern struct timezone sys_tz;
 
-static int affs_statfs(struct super_block *sb, struct kstatfs *buf);
+static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int affs_remount (struct super_block *sb, int *flags, char *data);
 
 static void
@@ -508,8 +508,9 @@ affs_remount(struct super_block *sb, int *flags, char *data)
 }
 
 static int
-affs_statfs(struct super_block *sb, struct kstatfs *buf)
+affs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
 	int		 free;
 
 	pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size,
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 6ed07a5f10c6..08201fab26cd 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -49,7 +49,7 @@ static int befs_nls2utf(struct super_block *sb, const char *in, int in_len,
 			char **out, int *out_len);
 static void befs_put_super(struct super_block *);
 static int befs_remount(struct super_block *, int *, char *);
-static int befs_statfs(struct super_block *, struct kstatfs *);
+static int befs_statfs(struct dentry *, struct kstatfs *);
 static int parse_options(char *, befs_mount_options *);
 
 static const struct super_operations befs_sops = {
@@ -880,8 +880,9 @@ befs_remount(struct super_block *sb, int *flags, char *data)
 }
 
 static int
-befs_statfs(struct super_block *sb, struct kstatfs *buf)
+befs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
 
 	befs_debug(sb, "---> befs_statfs()");
 
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index e7da03f63a5a..cf74f3d4d966 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -203,8 +203,9 @@ static void bfs_put_super(struct super_block *s)
 	s->s_fs_info = NULL;
 }
 
-static int bfs_statfs(struct super_block *s, struct kstatfs *buf)
+static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *s = dentry->d_sb;
 	struct bfs_sb_info *info = BFS_SB(s);
 	u64 id = huge_encode_dev(s->s_bdev->bd_dev);
 	buf->f_type = BFS_MAGIC;
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 08b35801dfed..7520f4687158 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -166,8 +166,9 @@ cifs_put_super(struct super_block *sb)
 }
 
 static int
-cifs_statfs(struct super_block *sb, struct kstatfs *buf)
+cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
 	int xid; 
 	int rc = -EOPNOTSUPP;
 	struct cifs_sb_info *cifs_sb;
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index cba70201567d..87f1dc8aa24b 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -36,7 +36,7 @@
 /* VFS super_block ops */
 static void coda_clear_inode(struct inode *);
 static void coda_put_super(struct super_block *);
-static int coda_statfs(struct super_block *sb, struct kstatfs *buf);
+static int coda_statfs(struct dentry *dentry, struct kstatfs *buf);
 
 static kmem_cache_t * coda_inode_cachep;
 
@@ -278,13 +278,13 @@ struct inode_operations coda_file_inode_operations = {
 	.setattr	= coda_setattr,
 };
 
-static int coda_statfs(struct super_block *sb, struct kstatfs *buf)
+static int coda_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	int error;
 	
 	lock_kernel();
 
-	error = venus_statfs(sb, buf);
+	error = venus_statfs(dentry, buf);
 
 	unlock_kernel();
 
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index 1bae99650a91..b040eba13a7d 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -611,7 +611,7 @@ int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
 	return error;
 }
 
-int venus_statfs(struct super_block *sb, struct kstatfs *sfs) 
+int venus_statfs(struct dentry *dentry, struct kstatfs *sfs)
 { 
         union inputArgs *inp;
         union outputArgs *outp;
@@ -620,7 +620,7 @@ int venus_statfs(struct super_block *sb, struct kstatfs *sfs)
 	insize = max_t(unsigned int, INSIZE(statfs), OUTSIZE(statfs));
 	UPARG(CODA_STATFS);
 
-        error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+        error = coda_upcall(coda_sbp(dentry->d_sb), insize, &outsize, inp);
 	
         if (!error) {
 		sfs->f_blocks = outp->coda_statfs.stat.f_blocks;
diff --git a/fs/compat.c b/fs/compat.c
index b1f64786a613..7e7e5bc4f3cf 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -197,7 +197,7 @@ asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs
 	error = user_path_walk(path, &nd);
 	if (!error) {
 		struct kstatfs tmp;
-		error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
+		error = vfs_statfs(nd.dentry, &tmp);
 		if (!error)
 			error = put_compat_statfs(buf, &tmp);
 		path_release(&nd);
@@ -215,7 +215,7 @@ asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user
 	file = fget(fd);
 	if (!file)
 		goto out;
-	error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
+	error = vfs_statfs(file->f_dentry, &tmp);
 	if (!error)
 		error = put_compat_statfs(buf, &tmp);
 	fput(file);
@@ -265,7 +265,7 @@ asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, s
 	error = user_path_walk(path, &nd);
 	if (!error) {
 		struct kstatfs tmp;
-		error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
+		error = vfs_statfs(nd.dentry, &tmp);
 		if (!error)
 			error = put_compat_statfs64(buf, &tmp);
 		path_release(&nd);
@@ -286,7 +286,7 @@ asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct c
 	file = fget(fd);
 	if (!file)
 		goto out;
-	error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
+	error = vfs_statfs(file->f_dentry, &tmp);
 	if (!error)
 		error = put_compat_statfs64(buf, &tmp);
 	fput(file);
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 37a91a153aa5..8a9d5d3b3262 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -322,8 +322,10 @@ out:
 	return -EINVAL;
 }
 
-static int cramfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int cramfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
+
 	buf->f_type = CRAMFS_MAGIC;
 	buf->f_bsize = PAGE_CACHE_SIZE;
 	buf->f_blocks = CRAMFS_SB(sb)->blocks;
diff --git a/fs/efs/super.c b/fs/efs/super.c
index 1ba5e14f879f..8ac2462ae5dd 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -15,7 +15,7 @@
 #include <linux/buffer_head.h>
 #include <linux/vfs.h>
 
-static int efs_statfs(struct super_block *s, struct kstatfs *buf);
+static int efs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int efs_fill_super(struct super_block *s, void *d, int silent);
 
 static int efs_get_sb(struct file_system_type *fs_type,
@@ -322,8 +322,8 @@ out_no_fs:
 	return -EINVAL;
 }
 
-static int efs_statfs(struct super_block *s, struct kstatfs *buf) {
-	struct efs_sb_info *sb = SUPER_INFO(s);
+static int efs_statfs(struct dentry *dentry, struct kstatfs *buf) {
+	struct efs_sb_info *sb = SUPER_INFO(dentry->d_sb);
 
 	buf->f_type    = EFS_SUPER_MAGIC;	/* efs magic number */
 	buf->f_bsize   = EFS_BLOCKSIZE;		/* blocksize */
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index a4dfffac5967..a6c4d6e02324 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -39,7 +39,7 @@
 static void ext2_sync_super(struct super_block *sb,
 			    struct ext2_super_block *es);
 static int ext2_remount (struct super_block * sb, int * flags, char * data);
-static int ext2_statfs (struct super_block * sb, struct kstatfs * buf);
+static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf);
 
 void ext2_error (struct super_block * sb, const char * function,
 		 const char * fmt, ...)
@@ -1038,8 +1038,9 @@ restore_opts:
 	return err;
 }
 
-static int ext2_statfs (struct super_block * sb, struct kstatfs * buf)
+static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
 {
+	struct super_block *sb = dentry->d_sb;
 	struct ext2_sb_info *sbi = EXT2_SB(sb);
 	unsigned long overhead;
 	int i;
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 657f8e73b62f..e08b6439617c 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -58,7 +58,7 @@ static int ext3_sync_fs(struct super_block *sb, int wait);
 static const char *ext3_decode_error(struct super_block * sb, int errno,
 				     char nbuf[16]);
 static int ext3_remount (struct super_block * sb, int * flags, char * data);
-static int ext3_statfs (struct super_block * sb, struct kstatfs * buf);
+static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
 static void ext3_unlockfs(struct super_block *sb);
 static void ext3_write_super (struct super_block * sb);
 static void ext3_write_super_lockfs(struct super_block *sb);
@@ -2318,8 +2318,9 @@ restore_opts:
 	return err;
 }
 
-static int ext3_statfs (struct super_block * sb, struct kstatfs * buf)
+static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 {
+	struct super_block *sb = dentry->d_sb;
 	struct ext3_sb_info *sbi = EXT3_SB(sb);
 	struct ext3_super_block *es = sbi->s_es;
 	unsigned long overhead;
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index c1ce284f8a94..7c35d582ec10 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -539,18 +539,18 @@ static int fat_remount(struct super_block *sb, int *flags, char *data)
 	return 0;
 }
 
-static int fat_statfs(struct super_block *sb, struct kstatfs *buf)
+static int fat_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct msdos_sb_info *sbi = MSDOS_SB(sb);
+	struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
 
 	/* If the count of free cluster is still unknown, counts it here. */
 	if (sbi->free_clusters == -1) {
-		int err = fat_count_free_clusters(sb);
+		int err = fat_count_free_clusters(dentry->d_sb);
 		if (err)
 			return err;
 	}
 
-	buf->f_type = sb->s_magic;
+	buf->f_type = dentry->d_sb->s_magic;
 	buf->f_bsize = sbi->cluster_size;
 	buf->f_blocks = sbi->max_cluster - FAT_START_ENT;
 	buf->f_bfree = sbi->free_clusters;
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index d76eeaafbde2..b74b791fc23b 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -40,6 +40,7 @@
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/vfs.h>
+#include <linux/mount.h>
 
 #include "vxfs.h"
 #include "vxfs_extern.h"
@@ -55,7 +56,7 @@ MODULE_ALIAS("vxfs"); /* makes mount -t vxfs autoload the module */
 
 
 static void		vxfs_put_super(struct super_block *);
-static int		vxfs_statfs(struct super_block *, struct kstatfs *);
+static int		vxfs_statfs(struct dentry *, struct kstatfs *);
 static int		vxfs_remount(struct super_block *, int *, char *);
 
 static struct super_operations vxfs_super_ops = {
@@ -90,12 +91,12 @@ vxfs_put_super(struct super_block *sbp)
 
 /**
  * vxfs_statfs - get filesystem information
- * @sbp:	VFS superblock
+ * @dentry:	VFS dentry to locate superblock
  * @bufp:	output buffer
  *
  * Description:
  *   vxfs_statfs fills the statfs buffer @bufp with information
- *   about the filesystem described by @sbp.
+ *   about the filesystem described by @dentry.
  *
  * Returns:
  *   Zero.
@@ -107,12 +108,12 @@ vxfs_put_super(struct super_block *sbp)
  *   This is everything but complete...
  */
 static int
-vxfs_statfs(struct super_block *sbp, struct kstatfs *bufp)
+vxfs_statfs(struct dentry *dentry, struct kstatfs *bufp)
 {
-	struct vxfs_sb_info		*infp = VXFS_SBI(sbp);
+	struct vxfs_sb_info		*infp = VXFS_SBI(dentry->d_sb);
 
 	bufp->f_type = VXFS_SUPER_MAGIC;
-	bufp->f_bsize = sbp->s_blocksize;
+	bufp->f_bsize = dentry->d_sb->s_blocksize;
 	bufp->f_blocks = infp->vsi_raw->vs_dsize;
 	bufp->f_bfree = infp->vsi_raw->vs_free;
 	bufp->f_bavail = 0;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index c91f0a50aadb..a13c0f529058 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -236,8 +236,9 @@ static void convert_fuse_statfs(struct kstatfs *stbuf, struct fuse_kstatfs *attr
 	/* fsid is left zero */
 }
 
-static int fuse_statfs(struct super_block *sb, struct kstatfs *buf)
+static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
 	struct fuse_conn *fc = get_fuse_conn_super(sb);
 	struct fuse_req *req;
 	struct fuse_statfs_out outarg;
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index ee5b80a409e8..d9227bf14e86 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -80,8 +80,10 @@ static void hfs_put_super(struct super_block *sb)
  *
  * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks.
  */
-static int hfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
+
 	buf->f_type = HFS_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div;
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 0ed8b7e8e87f..0a92fa2336a2 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -212,8 +212,10 @@ static void hfsplus_put_super(struct super_block *sb)
 	sb->s_fs_info = NULL;
 }
 
-static int hfsplus_statfs(struct super_block *sb, struct kstatfs *buf)
+static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
+
 	buf->f_type = HFSPLUS_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = HFSPLUS_SB(sb).total_blocks << HFSPLUS_SB(sb).fs_shift;
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 04035e08f5c1..8e0d37743e7c 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -239,7 +239,7 @@ static int read_inode(struct inode *ino)
 	return(err);
 }
 
-int hostfs_statfs(struct super_block *sb, struct kstatfs *sf)
+int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
 {
 	/* do_statfs uses struct statfs64 internally, but the linux kernel
 	 * struct statfs still has 32-bit versions for most of these fields,
@@ -252,7 +252,7 @@ int hostfs_statfs(struct super_block *sb, struct kstatfs *sf)
 	long long f_files;
 	long long f_ffree;
 
-	err = do_statfs(HOSTFS_I(sb->s_root->d_inode)->host_filename,
+	err = do_statfs(HOSTFS_I(dentry->d_sb->s_root->d_inode)->host_filename,
 			&sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files,
 			&f_ffree, &sf->f_fsid, sizeof(sf->f_fsid),
 			&sf->f_namelen, sf->f_spare);
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 3b25cf3e2e65..f798480a363f 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -135,8 +135,9 @@ static unsigned count_bitmaps(struct super_block *s)
 	return count;
 }
 
-static int hpfs_statfs(struct super_block *s, struct kstatfs *buf)
+static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *s = dentry->d_sb;
 	struct hpfs_sb_info *sbi = hpfs_sb(s);
 	lock_kernel();
 
diff --git a/fs/hppfs/hppfs_kern.c b/fs/hppfs/hppfs_kern.c
index ec43c22bc9c0..3a9bdf58166f 100644
--- a/fs/hppfs/hppfs_kern.c
+++ b/fs/hppfs/hppfs_kern.c
@@ -616,7 +616,7 @@ static const struct file_operations hppfs_dir_fops = {
 	.fsync		= hppfs_fsync,
 };
 
-static int hppfs_statfs(struct super_block *sb, struct kstatfs *sf)
+static int hppfs_statfs(struct dentry *dentry, struct kstatfs *sf)
 {
 	sf->f_blocks = 0;
 	sf->f_bfree = 0;
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 4665c26171f7..678fc72c3646 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -467,9 +467,9 @@ static int hugetlbfs_set_page_dirty(struct page *page)
 	return 0;
 }
 
-static int hugetlbfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb);
+	struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(dentry->d_sb);
 
 	buf->f_type = HUGETLBFS_MAGIC;
 	buf->f_bsize = HPAGE_SIZE;
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 17268da63a49..3f9c8ba1fa1f 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -56,7 +56,7 @@ static void isofs_put_super(struct super_block *sb)
 }
 
 static void isofs_read_inode(struct inode *);
-static int isofs_statfs (struct super_block *, struct kstatfs *);
+static int isofs_statfs (struct dentry *, struct kstatfs *);
 
 static kmem_cache_t *isofs_inode_cachep;
 
@@ -901,8 +901,10 @@ out_freesbi:
 	return -EINVAL;
 }
 
-static int isofs_statfs (struct super_block *sb, struct kstatfs *buf)
+static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
+
 	buf->f_type = ISOFS_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = (ISOFS_SB(sb)->s_nzones
diff --git a/fs/jffs/inode-v23.c b/fs/jffs/inode-v23.c
index dd93a091ad67..9e46ea6da752 100644
--- a/fs/jffs/inode-v23.c
+++ b/fs/jffs/inode-v23.c
@@ -377,9 +377,9 @@ jffs_new_inode(const struct inode * dir, struct jffs_raw_inode *raw_inode,
 
 /* Get statistics of the file system.  */
 static int
-jffs_statfs(struct super_block *sb, struct kstatfs *buf)
+jffs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct jffs_control *c = (struct jffs_control *) sb->s_fs_info;
+	struct jffs_control *c = (struct jffs_control *) dentry->d_sb->s_fs_info;
 	struct jffs_fmcontrol *fmc;
 
 	lock_kernel();
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 7b6c24b14f85..2900ec3ec3af 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -192,9 +192,9 @@ int jffs2_setattr(struct dentry *dentry, struct iattr *iattr)
 	return rc;
 }
 
-int jffs2_statfs(struct super_block *sb, struct kstatfs *buf)
+int jffs2_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
+	struct jffs2_sb_info *c = JFFS2_SB_INFO(dentry->d_sb);
 	unsigned long avail;
 
 	buf->f_type = JFFS2_SUPER_MAGIC;
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index cd4021bcb944..6b5223565405 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -175,7 +175,7 @@ void jffs2_clear_inode (struct inode *);
 void jffs2_dirty_inode(struct inode *inode);
 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 			       struct jffs2_raw_inode *ri);
-int jffs2_statfs (struct super_block *, struct kstatfs *);
+int jffs2_statfs (struct dentry *, struct kstatfs *);
 void jffs2_write_super (struct super_block *);
 int jffs2_remount_fs (struct super_block *, int *, char *);
 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 18a28137b90e..73d2aba084c6 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -139,9 +139,9 @@ static void jfs_destroy_inode(struct inode *inode)
 	kmem_cache_free(jfs_inode_cachep, ji);
 }
 
-static int jfs_statfs(struct super_block *sb, struct kstatfs *buf)
+static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct jfs_sb_info *sbi = JFS_SBI(sb);
+	struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
 	s64 maxinodes;
 	struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
 
diff --git a/fs/libfs.c b/fs/libfs.c
index 7d70efa46da9..1b1156381787 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -20,9 +20,9 @@ int simple_getattr(struct vfsmount *mnt, struct dentry *dentry,
 	return 0;
 }
 
-int simple_statfs(struct super_block *sb, struct kstatfs *buf)
+int simple_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	buf->f_type = sb->s_magic;
+	buf->f_type = dentry->d_sb->s_magic;
 	buf->f_bsize = PAGE_CACHE_SIZE;
 	buf->f_namelen = NAME_MAX;
 	return 0;
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 14f24dfbfe30..a6fb509b7341 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -19,7 +19,7 @@
 
 static void minix_read_inode(struct inode * inode);
 static int minix_write_inode(struct inode * inode, int wait);
-static int minix_statfs(struct super_block *sb, struct kstatfs *buf);
+static int minix_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int minix_remount (struct super_block * sb, int * flags, char * data);
 
 static void minix_delete_inode(struct inode *inode)
@@ -296,11 +296,11 @@ out_bad_sb:
 	return -EINVAL;
 }
 
-static int minix_statfs(struct super_block *sb, struct kstatfs *buf)
+static int minix_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct minix_sb_info *sbi = minix_sb(sb);
-	buf->f_type = sb->s_magic;
-	buf->f_bsize = sb->s_blocksize;
+	struct minix_sb_info *sbi = minix_sb(dentry->d_sb);
+	buf->f_type = dentry->d_sb->s_magic;
+	buf->f_bsize = dentry->d_sb->s_blocksize;
 	buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size;
 	buf->f_bfree = minix_count_free_blocks(sbi);
 	buf->f_bavail = buf->f_bfree;
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 8db033fab3fd..90d2ea28f333 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -39,7 +39,7 @@
 
 static void ncp_delete_inode(struct inode *);
 static void ncp_put_super(struct super_block *);
-static int  ncp_statfs(struct super_block *, struct kstatfs *);
+static int  ncp_statfs(struct dentry *, struct kstatfs *);
 
 static kmem_cache_t * ncp_inode_cachep;
 
@@ -724,13 +724,14 @@ static void ncp_put_super(struct super_block *sb)
 	kfree(server);
 }
 
-static int ncp_statfs(struct super_block *sb, struct kstatfs *buf)
+static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct dentry* d;
 	struct inode* i;
 	struct ncp_inode_info* ni;
 	struct ncp_server* s;
 	struct ncp_volume_info vi;
+	struct super_block *sb = dentry->d_sb;
 	int err;
 	__u8 dh;
 	
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index ff645a961bc8..937fbfc381bb 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -65,7 +65,7 @@ static int nfs_write_inode(struct inode *,int);
 static void nfs_delete_inode(struct inode *);
 static void nfs_clear_inode(struct inode *);
 static void nfs_umount_begin(struct super_block *);
-static int  nfs_statfs(struct super_block *, struct kstatfs *);
+static int  nfs_statfs(struct dentry *, struct kstatfs *);
 static int  nfs_show_options(struct seq_file *, struct vfsmount *);
 static int  nfs_show_stats(struct seq_file *, struct vfsmount *);
 static void nfs_zap_acl_cache(struct inode *);
@@ -534,8 +534,9 @@ nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
 }
 
 static int
-nfs_statfs(struct super_block *sb, struct kstatfs *buf)
+nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
 	struct nfs_server *server = NFS_SB(sb);
 	unsigned char blockbits;
 	unsigned long blockres;
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index de3998f15f10..5446a0861d1d 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1310,7 +1310,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
 	if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
 	    (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
 		       FATTR4_WORD1_SPACE_TOTAL))) {
-		status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
+		status = vfs_statfs(dentry, &statfs);
 		if (status)
 			goto out_nfserr;
 	}
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 1d65f13f458c..245eaa1fb59b 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1737,7 +1737,7 @@ int
 nfsd_statfs(struct svc_rqst *rqstp, struct svc_fh *fhp, struct kstatfs *stat)
 {
 	int err = fh_verify(rqstp, fhp, 0, MAY_NOP);
-	if (!err && vfs_statfs(fhp->fh_dentry->d_inode->i_sb,stat))
+	if (!err && vfs_statfs(fhp->fh_dentry,stat))
 		err = nfserr_io;
 	return err;
 }
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index d5d5e969294f..0e14acea3f8b 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2601,10 +2601,10 @@ static unsigned long __get_nr_free_mft_records(ntfs_volume *vol,
 
 /**
  * ntfs_statfs - return information about mounted NTFS volume
- * @sb:		super block of mounted volume
+ * @dentry:	dentry from mounted volume
  * @sfs:	statfs structure in which to return the information
  *
- * Return information about the mounted NTFS volume @sb in the statfs structure
+ * Return information about the mounted NTFS volume @dentry in the statfs structure
  * pointed to by @sfs (this is initialized with zeros before ntfs_statfs is
  * called). We interpret the values to be correct of the moment in time at
  * which we are called. Most values are variable otherwise and this isn't just
@@ -2617,8 +2617,9 @@ static unsigned long __get_nr_free_mft_records(ntfs_volume *vol,
  *
  * Return 0 on success or -errno on error.
  */
-static int ntfs_statfs(struct super_block *sb, struct kstatfs *sfs)
+static int ntfs_statfs(struct dentry *dentry, struct kstatfs *sfs)
 {
+	struct super_block *sb = dentry->d_sb;
 	s64 size;
 	ntfs_volume *vol = NTFS_SB(sb);
 	ntfs_inode *mft_ni = NTFS_I(vol->mft_ino);
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 788b8b50dc4c..cdf73393f094 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -100,7 +100,7 @@ static int ocfs2_initialize_mem_caches(void);
 static void ocfs2_free_mem_caches(void);
 static void ocfs2_delete_osb(struct ocfs2_super *osb);
 
-static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf);
+static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
 
 static int ocfs2_sync_fs(struct super_block *sb, int wait);
 
@@ -857,7 +857,7 @@ static void ocfs2_put_super(struct super_block *sb)
 	mlog_exit_void();
 }
 
-static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf)
+static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct ocfs2_super *osb;
 	u32 numbits, freebits;
@@ -866,9 +866,9 @@ static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf)
 	struct buffer_head *bh = NULL;
 	struct inode *inode = NULL;
 
-	mlog_entry("(%p, %p)\n", sb, buf);
+	mlog_entry("(%p, %p)\n", dentry->d_sb, buf);
 
-	osb = OCFS2_SB(sb);
+	osb = OCFS2_SB(dentry->d_sb);
 
 	inode = ocfs2_get_system_file_inode(osb,
 					    GLOBAL_BITMAP_SYSTEM_INODE,
@@ -891,7 +891,7 @@ static int ocfs2_statfs(struct super_block *sb, struct kstatfs *buf)
 	freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
 
 	buf->f_type = OCFS2_SUPER_MAGIC;
-	buf->f_bsize = sb->s_blocksize;
+	buf->f_bsize = dentry->d_sb->s_blocksize;
 	buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
 	buf->f_blocks = ((sector_t) numbits) *
 			(osb->s_clustersize >> osb->sb->s_blocksize_bits);
diff --git a/fs/open.c b/fs/open.c
index 4f178acd4c09..a37ff861108f 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -31,18 +31,18 @@
 
 #include <asm/unistd.h>
 
-int vfs_statfs(struct super_block *sb, struct kstatfs *buf)
+int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	int retval = -ENODEV;
 
-	if (sb) {
+	if (dentry) {
 		retval = -ENOSYS;
-		if (sb->s_op->statfs) {
+		if (dentry->d_sb->s_op->statfs) {
 			memset(buf, 0, sizeof(*buf));
-			retval = security_sb_statfs(sb);
+			retval = security_sb_statfs(dentry);
 			if (retval)
 				return retval;
-			retval = sb->s_op->statfs(sb, buf);
+			retval = dentry->d_sb->s_op->statfs(dentry, buf);
 			if (retval == 0 && buf->f_frsize == 0)
 				buf->f_frsize = buf->f_bsize;
 		}
@@ -52,12 +52,12 @@ int vfs_statfs(struct super_block *sb, struct kstatfs *buf)
 
 EXPORT_SYMBOL(vfs_statfs);
 
-static int vfs_statfs_native(struct super_block *sb, struct statfs *buf)
+static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf)
 {
 	struct kstatfs st;
 	int retval;
 
-	retval = vfs_statfs(sb, &st);
+	retval = vfs_statfs(dentry, &st);
 	if (retval)
 		return retval;
 
@@ -95,12 +95,12 @@ static int vfs_statfs_native(struct super_block *sb, struct statfs *buf)
 	return 0;
 }
 
-static int vfs_statfs64(struct super_block *sb, struct statfs64 *buf)
+static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf)
 {
 	struct kstatfs st;
 	int retval;
 
-	retval = vfs_statfs(sb, &st);
+	retval = vfs_statfs(dentry, &st);
 	if (retval)
 		return retval;
 
@@ -130,7 +130,7 @@ asmlinkage long sys_statfs(const char __user * path, struct statfs __user * buf)
 	error = user_path_walk(path, &nd);
 	if (!error) {
 		struct statfs tmp;
-		error = vfs_statfs_native(nd.dentry->d_inode->i_sb, &tmp);
+		error = vfs_statfs_native(nd.dentry, &tmp);
 		if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
 			error = -EFAULT;
 		path_release(&nd);
@@ -149,7 +149,7 @@ asmlinkage long sys_statfs64(const char __user *path, size_t sz, struct statfs64
 	error = user_path_walk(path, &nd);
 	if (!error) {
 		struct statfs64 tmp;
-		error = vfs_statfs64(nd.dentry->d_inode->i_sb, &tmp);
+		error = vfs_statfs64(nd.dentry, &tmp);
 		if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
 			error = -EFAULT;
 		path_release(&nd);
@@ -168,7 +168,7 @@ asmlinkage long sys_fstatfs(unsigned int fd, struct statfs __user * buf)
 	file = fget(fd);
 	if (!file)
 		goto out;
-	error = vfs_statfs_native(file->f_dentry->d_inode->i_sb, &tmp);
+	error = vfs_statfs_native(file->f_dentry, &tmp);
 	if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
 		error = -EFAULT;
 	fput(file);
@@ -189,7 +189,7 @@ asmlinkage long sys_fstatfs64(unsigned int fd, size_t sz, struct statfs64 __user
 	file = fget(fd);
 	if (!file)
 		goto out;
-	error = vfs_statfs64(file->f_dentry->d_inode->i_sb, &tmp);
+	error = vfs_statfs64(file->f_dentry, &tmp);
 	if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
 		error = -EFAULT;
 	fput(file);
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index e6cca5cd4b44..2f24c46f72a1 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -128,7 +128,7 @@ static struct inode *qnx4_alloc_inode(struct super_block *sb);
 static void qnx4_destroy_inode(struct inode *inode);
 static void qnx4_read_inode(struct inode *);
 static int qnx4_remount(struct super_block *sb, int *flags, char *data);
-static int qnx4_statfs(struct super_block *, struct kstatfs *);
+static int qnx4_statfs(struct dentry *, struct kstatfs *);
 
 static struct super_operations qnx4_sops =
 {
@@ -282,8 +282,10 @@ unsigned long qnx4_block_map( struct inode *inode, long iblock )
 	return block;
 }
 
-static int qnx4_statfs(struct super_block *sb, struct kstatfs *buf)
+static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
+
 	lock_kernel();
 
 	buf->f_type    = sb->s_magic;
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index f3ff41d33989..00f1321e9209 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -60,7 +60,7 @@ static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
 }
 
 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
-static int reiserfs_statfs(struct super_block *s, struct kstatfs *buf);
+static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
 
 static int reiserfs_sync_fs(struct super_block *s, int wait)
 {
@@ -1938,15 +1938,15 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
 	return errval;
 }
 
-static int reiserfs_statfs(struct super_block *s, struct kstatfs *buf)
+static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
+	struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
 
 	buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
 	buf->f_bfree = sb_free_blocks(rs);
 	buf->f_bavail = buf->f_bfree;
 	buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
-	buf->f_bsize = s->s_blocksize;
+	buf->f_bsize = dentry->d_sb->s_blocksize;
 	/* changed to accommodate gcc folks. */
 	buf->f_type = REISERFS_SUPER_MAGIC;
 	return 0;
diff --git a/fs/romfs/inode.c b/fs/romfs/inode.c
index 4d6cd6621062..283fbc6b8eea 100644
--- a/fs/romfs/inode.c
+++ b/fs/romfs/inode.c
@@ -179,12 +179,12 @@ outnobh:
 /* That's simple too. */
 
 static int
-romfs_statfs(struct super_block *sb, struct kstatfs *buf)
+romfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	buf->f_type = ROMFS_MAGIC;
 	buf->f_bsize = ROMBSIZE;
 	buf->f_bfree = buf->f_bavail = buf->f_ffree;
-	buf->f_blocks = (romfs_maxsize(sb)+ROMBSIZE-1)>>ROMBSBITS;
+	buf->f_blocks = (romfs_maxsize(dentry->d_sb)+ROMBSIZE-1)>>ROMBSBITS;
 	buf->f_namelen = ROMFS_MAXFN;
 	return 0;
 }
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 4a37c2bbfa3f..506ff87c1d4b 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -48,7 +48,7 @@
 
 static void smb_delete_inode(struct inode *);
 static void smb_put_super(struct super_block *);
-static int  smb_statfs(struct super_block *, struct kstatfs *);
+static int  smb_statfs(struct dentry *, struct kstatfs *);
 static int  smb_show_options(struct seq_file *, struct vfsmount *);
 
 static kmem_cache_t *smb_inode_cachep;
@@ -641,13 +641,13 @@ out_no_server:
 }
 
 static int
-smb_statfs(struct super_block *sb, struct kstatfs *buf)
+smb_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	int result;
 	
 	lock_kernel();
 
-	result = smb_proc_dskattr(sb, buf);
+	result = smb_proc_dskattr(dentry, buf);
 
 	unlock_kernel();
 
diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c
index b1b878b81730..c3495059889d 100644
--- a/fs/smbfs/proc.c
+++ b/fs/smbfs/proc.c
@@ -3226,9 +3226,9 @@ smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr)
 }
 
 int
-smb_proc_dskattr(struct super_block *sb, struct kstatfs *attr)
+smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr)
 {
-	struct smb_sb_info *server = SMB_SB(sb);
+	struct smb_sb_info *server = SMB_SB(dentry->d_sb);
 	int result;
 	char *p;
 	long unit;
diff --git a/fs/smbfs/proto.h b/fs/smbfs/proto.h
index 47664597e6b1..972ed7dad388 100644
--- a/fs/smbfs/proto.h
+++ b/fs/smbfs/proto.h
@@ -29,7 +29,7 @@ extern int smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr);
 extern int smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr);
 extern int smb_proc_setattr_unix(struct dentry *d, struct iattr *attr, unsigned int major, unsigned int minor);
 extern int smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr);
-extern int smb_proc_dskattr(struct super_block *sb, struct kstatfs *attr);
+extern int smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr);
 extern int smb_proc_read_link(struct smb_sb_info *server, struct dentry *d, char *buffer, int len);
 extern int smb_proc_symlink(struct smb_sb_info *server, struct dentry *d, const char *oldpath);
 extern int smb_proc_link(struct smb_sb_info *server, struct dentry *dentry, struct dentry *new_dentry);
diff --git a/fs/super.c b/fs/super.c
index 324c2d232f54..057b5325b7ef 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -486,7 +486,7 @@ asmlinkage long sys_ustat(unsigned dev, struct ustat __user * ubuf)
         s = user_get_super(new_decode_dev(dev));
         if (s == NULL)
                 goto out;
-	err = vfs_statfs(s, &sbuf);
+	err = vfs_statfs(s->s_root, &sbuf);
 	drop_super(s);
 	if (err)
 		goto out;
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index 3ff89cc5833a..58b2d22142ba 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -85,8 +85,9 @@ static void sysv_put_super(struct super_block *sb)
 	kfree(sbi);
 }
 
-static int sysv_statfs(struct super_block *sb, struct kstatfs *buf)
+static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
 	struct sysv_sb_info *sbi = SYSV_SB(sb);
 
 	buf->f_type = sb->s_magic;
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 2250774a831d..44fe2cb0bbb2 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -91,7 +91,7 @@ static void udf_load_partdesc(struct super_block *, struct buffer_head *);
 static void udf_open_lvid(struct super_block *);
 static void udf_close_lvid(struct super_block *);
 static unsigned int udf_count_free(struct super_block *);
-static int udf_statfs(struct super_block *, struct kstatfs *);
+static int udf_statfs(struct dentry *, struct kstatfs *);
 
 /* UDF filesystem type */
 static int udf_get_sb(struct file_system_type *fs_type,
@@ -1779,8 +1779,10 @@ udf_put_super(struct super_block *sb)
  *	Written, tested, and released.
  */
 static int
-udf_statfs(struct super_block *sb, struct kstatfs *buf)
+udf_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
+
 	buf->f_type = UDF_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 768fb8d9e67a..fe5ab2aa2899 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1113,8 +1113,9 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
 	return 0;
 }
 
-static int ufs_statfs (struct super_block *sb, struct kstatfs *buf)
+static int ufs_statfs (struct dentry *dentry, struct kstatfs *buf)
 {
+	struct super_block *sb = dentry->d_sb;
 	struct ufs_sb_private_info * uspi;
 	struct ufs_super_block_first * usb1;
 	struct ufs_super_block * usb;
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index d03c89a36655..4fb0fc65af34 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -684,10 +684,10 @@ xfs_fs_sync_super(
 
 STATIC int
 xfs_fs_statfs(
-	struct super_block	*sb,
+	struct dentry		*dentry,
 	struct kstatfs		*statp)
 {
-	return -bhv_vfs_statvfs(vfs_from_sb(sb), statp, NULL);
+	return -bhv_vfs_statvfs(vfs_from_sb(dentry->d_sb), statp, NULL);
 }
 
 STATIC int
diff --git a/include/linux/coda_psdev.h b/include/linux/coda_psdev.h
index d539262a8f89..98f6c52c152b 100644
--- a/include/linux/coda_psdev.h
+++ b/include/linux/coda_psdev.h
@@ -70,7 +70,7 @@ int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
 		 unsigned int cmd, struct PioctlData *data);
 int coda_downcall(int opcode, union outputArgs *out, struct super_block *sb);
 int venus_fsync(struct super_block *sb, struct CodaFid *fid);
-int venus_statfs(struct super_block *sb, struct kstatfs *sfs);
+int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);
 
 
 /* messages between coda filesystem in kernel and Venus */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3e50dd24af87..c823a3815e24 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1096,7 +1096,7 @@ struct super_operations {
 	int (*sync_fs)(struct super_block *sb, int wait);
 	void (*write_super_lockfs) (struct super_block *);
 	void (*unlockfs) (struct super_block *);
-	int (*statfs) (struct super_block *, struct kstatfs *);
+	int (*statfs) (struct dentry *, struct kstatfs *);
 	int (*remount_fs) (struct super_block *, int *, char *);
 	void (*clear_inode) (struct inode *);
 	void (*umount_begin) (struct super_block *);
@@ -1325,7 +1325,7 @@ extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
 extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
 				  struct vfsmount *);
 
-extern int vfs_statfs(struct super_block *, struct kstatfs *);
+extern int vfs_statfs(struct dentry *, struct kstatfs *);
 
 /* /sys/fs */
 extern struct subsystem fs_subsys;
@@ -1746,7 +1746,7 @@ extern int dcache_dir_close(struct inode *, struct file *);
 extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
 extern int dcache_readdir(struct file *, void *, filldir_t);
 extern int simple_getattr(struct vfsmount *, struct dentry *, struct kstat *);
-extern int simple_statfs(struct super_block *, struct kstatfs *);
+extern int simple_statfs(struct dentry *, struct kstatfs *);
 extern int simple_link(struct dentry *, struct inode *, struct dentry *);
 extern int simple_unlink(struct inode *, struct dentry *);
 extern int simple_rmdir(struct inode *, struct dentry *);
diff --git a/include/linux/mount.h b/include/linux/mount.h
index b7472ae91fa4..60718f12caa9 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -17,6 +17,11 @@
 #include <linux/spinlock.h>
 #include <asm/atomic.h>
 
+struct super_block;
+struct vfsmount;
+struct dentry;
+struct namespace;
+
 #define MNT_NOSUID	0x01
 #define MNT_NODEV	0x02
 #define MNT_NOEXEC	0x04
diff --git a/include/linux/security.h b/include/linux/security.h
index 47722d355532..383c320fc834 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -171,9 +171,9 @@ struct swap_info_struct;
  *	Deallocate and clear the sb->s_security field.
  *	@sb contains the super_block structure to be modified.
  * @sb_statfs:
- *	Check permission before obtaining filesystem statistics for the @sb
- *	filesystem.
- *	@sb contains the super_block structure for the filesystem.
+ *	Check permission before obtaining filesystem statistics for the @mnt
+ *	mountpoint.
+ *	@dentry is a handle on the superblock for the filesystem.
  *	Return 0 if permission is granted.  
  * @sb_mount:
  *	Check permission before an object specified by @dev_name is mounted on
@@ -1127,7 +1127,7 @@ struct security_operations {
 	int (*sb_copy_data)(struct file_system_type *type,
 			    void *orig, void *copy);
 	int (*sb_kern_mount) (struct super_block *sb, void *data);
-	int (*sb_statfs) (struct super_block * sb);
+	int (*sb_statfs) (struct dentry *dentry);
 	int (*sb_mount) (char *dev_name, struct nameidata * nd,
 			 char *type, unsigned long flags, void *data);
 	int (*sb_check_sb) (struct vfsmount * mnt, struct nameidata * nd);
@@ -1450,9 +1450,9 @@ static inline int security_sb_kern_mount (struct super_block *sb, void *data)
 	return security_ops->sb_kern_mount (sb, data);
 }
 
-static inline int security_sb_statfs (struct super_block *sb)
+static inline int security_sb_statfs (struct dentry *dentry)
 {
-	return security_ops->sb_statfs (sb);
+	return security_ops->sb_statfs (dentry);
 }
 
 static inline int security_sb_mount (char *dev_name, struct nameidata *nd,
@@ -2162,7 +2162,7 @@ static inline int security_sb_kern_mount (struct super_block *sb, void *data)
 	return 0;
 }
 
-static inline int security_sb_statfs (struct super_block *sb)
+static inline int security_sb_statfs (struct dentry *dentry)
 {
 	return 0;
 }
diff --git a/kernel/acct.c b/kernel/acct.c
index b327f4d20104..6802020e0ceb 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -118,7 +118,7 @@ static int check_free_space(struct file *file)
 	spin_unlock(&acct_globals.lock);
 
 	/* May block */
-	if (vfs_statfs(file->f_dentry->d_inode->i_sb, &sbuf))
+	if (vfs_statfs(file->f_dentry, &sbuf))
 		return res;
 	suspend = sbuf.f_blocks * SUSPEND;
 	resume = sbuf.f_blocks * RESUME;
diff --git a/mm/shmem.c b/mm/shmem.c
index 7617bb1c6bf7..10020d8b4073 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1654,9 +1654,9 @@ static ssize_t shmem_file_sendfile(struct file *in_file, loff_t *ppos,
 	return desc.error;
 }
 
-static int shmem_statfs(struct super_block *sb, struct kstatfs *buf)
+static int shmem_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
+	struct shmem_sb_info *sbinfo = SHMEM_SB(dentry->d_sb);
 
 	buf->f_type = TMPFS_MAGIC;
 	buf->f_bsize = PAGE_CACHE_SIZE;
diff --git a/security/dummy.c b/security/dummy.c
index 6de4a4a5eb13..c98d553984ec 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -191,7 +191,7 @@ static int dummy_sb_kern_mount (struct super_block *sb, void *data)
 	return 0;
 }
 
-static int dummy_sb_statfs (struct super_block *sb)
+static int dummy_sb_statfs (struct dentry *dentry)
 {
 	return 0;
 }
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 524915dfda64..093efba4d9b6 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1903,13 +1903,13 @@ static int selinux_sb_kern_mount(struct super_block *sb, void *data)
 	return superblock_has_perm(current, sb, FILESYSTEM__MOUNT, &ad);
 }
 
-static int selinux_sb_statfs(struct super_block *sb)
+static int selinux_sb_statfs(struct dentry *dentry)
 {
 	struct avc_audit_data ad;
 
 	AVC_AUDIT_DATA_INIT(&ad,FS);
-	ad.u.fs.dentry = sb->s_root;
-	return superblock_has_perm(current, sb, FILESYSTEM__GETATTR, &ad);
+	ad.u.fs.dentry = dentry->d_sb->s_root;
+	return superblock_has_perm(current, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
 }
 
 static int selinux_mount(char * dev_name,
-- 
cgit v1.2.3-58-ga151


From 3c5a87f476bed45616e7e543dcaea4440c77bf93 Mon Sep 17 00:00:00 2001
From: Christoph Lameter <clameter@sgi.com>
Date: Fri, 23 Jun 2006 02:03:08 -0700
Subject: [PATCH] migration: remove unnecessary PageSwapCache checks

Remove two unnecessary PageSwapCache checks.  The page refcount is raised
and therefore page migration cannot occur in both functions.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 mm/shmem.c    | 8 --------
 mm/swapfile.c | 7 -------
 2 files changed, 15 deletions(-)

(limited to 'mm/shmem.c')

diff --git a/mm/shmem.c b/mm/shmem.c
index 10020d8b4073..84b5cf9b63c5 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1081,14 +1081,6 @@ repeat:
 			page_cache_release(swappage);
 			goto repeat;
 		}
-		if (!PageSwapCache(swappage)) {
-			/* Page migration has occured */
-			shmem_swp_unmap(entry);
-			spin_unlock(&info->lock);
-			unlock_page(swappage);
-			page_cache_release(swappage);
-			goto repeat;
-		}
 		if (PageWriteback(swappage)) {
 			shmem_swp_unmap(entry);
 			spin_unlock(&info->lock);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index e5fd5385f0cc..47a6812f5f8c 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -716,7 +716,6 @@ static int try_to_unuse(unsigned int type)
 		 */
 		swap_map = &si->swap_map[i];
 		entry = swp_entry(type, i);
-again:
 		page = read_swap_cache_async(entry, NULL, 0);
 		if (!page) {
 			/*
@@ -751,12 +750,6 @@ again:
 		wait_on_page_locked(page);
 		wait_on_page_writeback(page);
 		lock_page(page);
-		if (!PageSwapCache(page)) {
-			/* Page migration has occured */
-			unlock_page(page);
-			page_cache_release(page);
-			goto again;
-		}
 		wait_on_page_writeback(page);
 
 		/*
-- 
cgit v1.2.3-58-ga151