Embed a struct path into struct nameidata instead of nd->{dentry,mnt}

This is the central patch of a cleanup series. In most cases there is no good
reason why someone would want to use a dentry for itself. This series reflects
that fact and embeds a struct path into nameidata.

Together with the other patches of this series
- it enforced the correct order of getting/releasing the reference count on
  <dentry,vfsmount> pairs
- it prepares the VFS for stacking support since it is essential to have a
  struct path in every place where the stack can be traversed
- it reduces the overall code size:

without patch series:
   text    data     bss     dec     hex filename
5321639  858418  715768 6895825  6938d1 vmlinux

with patch series:
   text    data     bss     dec     hex filename
5320026  858418  715768 6894212  693284 vmlinux

This patch:

Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix cifs]
[akpm@linux-foundation.org: fix smack]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index cb20b964419f..841a032050a7 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -51,13 +51,13 @@ static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
 
         if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
                 goto out;
-        dentry_save = nd->dentry;
-        vfsmount_save = nd->mnt;
-        nd->dentry = lower_dentry;
-        nd->mnt = lower_mnt;
+        dentry_save = nd->path.dentry;
+        vfsmount_save = nd->path.mnt;
+        nd->path.dentry = lower_dentry;
+        nd->path.mnt = lower_mnt;
         rc = lower_dentry->d_op->d_revalidate(lower_dentry, nd);
-        nd->dentry = dentry_save;
-        nd->mnt = vfsmount_save;
+        nd->path.dentry = dentry_save;
+        nd->path.mnt = vfsmount_save;
         if (dentry->d_inode) {
                 struct inode *lower_inode =
                         ecryptfs_inode_to_lower(dentry->d_inode);