audit: optimize audit_compare_dname_path

In the cases where we already know the length of the parent, pass it as
a parm so we don't need to recompute it. In the cases where we don't
know the length, pass in AUDIT_NAME_FULL (-1) to indicate that it should
be determined.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index deb97c139e0c..9a9ae6e3d290 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -265,7 +265,8 @@ static void audit_update_watch(struct audit_parent *parent,
         /* Run all of the watches on this parent looking for the one that
          * matches the given dname */
         list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) {
-                if (audit_compare_dname_path(dname, owatch->path))
+                if (audit_compare_dname_path(dname, owatch->path,
+                                             AUDIT_NAME_FULL))
                         continue;
 
                 /* If the update involves invalidating rules, do the inode-based