vfs: remove DCACHE_NEED_LOOKUP

The code that relied on that flag was ripped out of btrfs quite some
time ago, and never added back. Josef indicated that he was going to
take a different approach to the problem in btrfs, and that we
could just eliminate this flag.

Cc: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 15 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 67ed24ae86bb..16d9e8e191e6 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4262,16 +4262,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
         if (dentry->d_name.len > BTRFS_NAME_LEN)
                 return ERR_PTR(-ENAMETOOLONG);
 
-        if (unlikely(d_need_lookup(dentry))) {
-                memcpy(&location, dentry->d_fsdata, sizeof(struct btrfs_key));
-                kfree(dentry->d_fsdata);
-                dentry->d_fsdata = NULL;
-                /* This thing is hashed, drop it for now */
-                d_drop(dentry);
-        } else {
-                ret = btrfs_inode_by_name(dir, dentry, &location);
-        }
-
+        ret = btrfs_inode_by_name(dir, dentry, &location);
         if (ret < 0)
                 return ERR_PTR(ret);
 
@@ -4341,11 +4332,6 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
         struct dentry *ret;
 
         ret = d_splice_alias(btrfs_lookup_dentry(dir, dentry), dentry);
-        if (unlikely(d_need_lookup(dentry))) {
-                spin_lock(&dentry->d_lock);
-                dentry->d_flags &= ~DCACHE_NEED_LOOKUP;
-                spin_unlock(&dentry->d_lock);
-        }
         return ret;
 }