From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751209AbaCWS33 (ORCPT ); Sun, 23 Mar 2014 14:29:29 -0400 Received: from mail-pd0-f170.google.com ([209.85.192.170]:45156 "EHLO mail-pd0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750807AbaCWS32 (ORCPT ); Sun, 23 Mar 2014 14:29:28 -0400 From: Monam Agarwal To: agk@redhat.com, snitzer@redhat.com, dm-devel@redhat.com, neilb@suse.de, linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] drivers/md: Use RCU_INIT_POINTER(x, NULL) in dm.c Date: Sun, 23 Mar 2014 23:58:27 +0530 Message-Id: <1395599307-6862-1-git-send-email-monamagarwal123@gmail.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch replaces rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL) The rcu_assign_pointer() ensures that the initialization of a structure is carried out before storing a pointer to that structure. And in the case of the NULL pointer, there is no structure to initialize. So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL) Signed-off-by: Monam Agarwal --- drivers/md/dm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 8c53b09..804412a 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2172,7 +2172,7 @@ static struct dm_table *__unbind(struct mapped_device *md) return NULL; dm_table_event_callback(map, NULL, NULL); - rcu_assign_pointer(md->map, NULL); + RCU_INIT_POINTER(md->map, NULL); dm_sync_table(md); return map; -- 1.7.9.5