check_rdev
static int check_rdev(struct key_call_private *);
(void) check_rdev(kcp);
(!check_rdev(kcp) || kcp->pid != getpid() || stale)) {
(void) check_rdev(p);
if (!(*binding)->cache_bad && check_rdev(*binding)) {
static int check_rdev(struct dom_binding *);