autofs4: revert - redo lookup in ttfd

This patch series enables the use of a single dentry for lookups prior to
the dentry being hashed and so we no longer need to redo the lookup.  This
patch reverts the patch of commit
033790449ba9c4dcf8478a87693d33df625c23b5.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 21 deletions

diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 9ead2279df4f..53dabe8d5b8b 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -242,7 +242,6 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
 {
         struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
         struct autofs_info *ino = autofs4_dentry_ino(dentry);
-        struct dentry *new;
         int status;
 
         /* Block on any pending expiry here; invalidate the dentry
@@ -320,26 +319,6 @@ static int try_to_fill_dentry(struct dentry *dentry, int flags)
         dentry->d_flags &= ~DCACHE_AUTOFS_PENDING;
         spin_unlock(&dentry->d_lock);
 
-        /*
-         * The dentry that is passed in from lookup may not be the one
-         * we end up using, as mkdir can create a new one.  If this
-         * happens, and another process tries the lookup at the same time,
-         * it will set the PENDING flag on this new dentry, but add itself
-         * to our waitq.  Then, if after the lookup succeeds, the first
-         * process that requested the mount performs another lookup of the
-         * same directory, it will show up as still pending!  So, we need
-         * to redo the lookup here and clear pending on that dentry.
-         */
-        if (d_unhashed(dentry)) {
-                new = d_lookup(dentry->d_parent, &dentry->d_name);
-                if (new) {
-                        spin_lock(&new->d_lock);
-                        new->d_flags &= ~DCACHE_AUTOFS_PENDING;
-                        spin_unlock(&new->d_lock);
-                        dput(new);
-                }
-        }
-
         return 0;
 }