From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751768AbaCVUaV (ORCPT ); Sat, 22 Mar 2014 16:30:21 -0400 Received: from mail-pa0-f41.google.com ([209.85.220.41]:58597 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751681AbaCVUaO (ORCPT ); Sat, 22 Mar 2014 16:30:14 -0400 From: Monam Agarwal To: axboe@kernel.dk, linux-kernel@vger.kernel.org Subject: [PATCH] block: Use RCU_INIT_POINTER(x, NULL) in blk-ioc.c Date: Sun, 23 Mar 2014 01:59:14 +0530 Message-Id: <1395520154-2815-1-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 --- block/blk-ioc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-ioc.c b/block/blk-ioc.c index 242df01..6585186 100644 --- a/block/blk-ioc.c +++ b/block/blk-ioc.c @@ -69,7 +69,7 @@ static void ioc_destroy_icq(struct io_cq *icq) * will. Hint assignment itself can race safely. */ if (rcu_dereference_raw(ioc->icq_hint) == icq) - rcu_assign_pointer(ioc->icq_hint, NULL); + RCU_INIT_POINTER(ioc->icq_hint, NULL); ioc_exit_icq(icq); -- 1.7.9.5