From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757083AbcIUMe5 (ORCPT ); Wed, 21 Sep 2016 08:34:57 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:19492 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756023AbcIUMew (ORCPT ); Wed, 21 Sep 2016 08:34:52 -0400 From: Vasily Averin Subject: [PATCH 2/2] notifiers: double register detection To: linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org Cc: "J. Bruce Fields" , Jeff Layton , Scott Mayhew Message-ID: <105a9bce-5539-73f1-2683-e52dba870c04@virtuozzo.com> Date: Wed, 21 Sep 2016 15:33:11 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org WARN_ON should help to detect double register of the same notifiers Signed-off-by: Vasily Averin --- kernel/notifier.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/notifier.c b/kernel/notifier.c index fd2c9ac..e02b2f0 100644 --- a/kernel/notifier.c +++ b/kernel/notifier.c @@ -22,6 +22,7 @@ static int notifier_chain_register(struct notifier_block **nl, struct notifier_block *n) { while ((*nl) != NULL) { + WARN_ON((*nl) == n); if (n->priority > (*nl)->priority) break; nl = &((*nl)->next); -- 1.9.1