sock: tigthen lockdep checks for sock_owned_by_user

sock_owned_by_user should not be used without socket lock held. It seems
to be a common practice to check .owned before lock reclassification, so
provide a little help to abstract this check away.

Cc: linux-cifs@vger.kernel.org
Cc: linux-bluetooth@vger.kernel.org
Cc: linux-nfs@vger.kernel.org
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/llc/llc_proc.c b/net/llc/llc_proc.c
index 1a3c7e0..29c509c 100644
--- a/net/llc/llc_proc.c
+++ b/net/llc/llc_proc.c
@@ -195,7 +195,7 @@
 		   timer_pending(&llc->pf_cycle_timer.timer),
 		   timer_pending(&llc->rej_sent_timer.timer),
 		   timer_pending(&llc->busy_state_timer.timer),
-		   !!sk->sk_backlog.tail, !!sock_owned_by_user(sk));
+		   !!sk->sk_backlog.tail, !!sk->sk_lock.owned);
 out:
 	return 0;
 }