[PATCH] vfs: Update lookup_dcache() comment

[Oleg Drokin <green@linuxhacker.ru>]

commit 6c51e513a3aa ("lookup_dcache(): lift d_alloc() into callers")
removed the need_lookup argument from lookup_dcache(), but the
comment was forgotten. Also it no longer allocates a new dentry
if nothing was found.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
---
 fs/namei.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 70580ab..c4f52e8 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1449,9 +1449,8 @@ static int follow_dotdot(struct nameidata *nd)
 }
 
 /*
- * This looks up the name in dcache, possibly revalidates the old dentry and
- * allocates a new one if not found or not valid.  In the need_lookup argument
- * returns whether i_op->lookup is necessary.
+ * This looks up the name in dcache and possibly revalidates the found dentry.
+ * NULL is returned if the dentry does not exist in the cache.
  */
 static struct dentry *lookup_dcache(const struct qstr *name,
 				    struct dentry *dir,
-- 
2.7.4