From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753991AbZGNHfH (ORCPT ); Tue, 14 Jul 2009 03:35:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753940AbZGNHfG (ORCPT ); Tue, 14 Jul 2009 03:35:06 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:49914 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753609AbZGNHfF (ORCPT ); Tue, 14 Jul 2009 03:35:05 -0400 Message-ID: <4A5C3549.7000905@cn.fujitsu.com> Date: Tue, 14 Jul 2009 15:35:37 +0800 From: Lai Jiangshan User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: Ingo Molnar , Steven Rostedt , Frederic Weisbecker , LKML Subject: [PATCH -tip] ring_buffer: fix warning 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 kernel/trace/ring_buffer.c: In function 'rb_tail_page_update': kernel/trace/ring_buffer.c:849: warning: value computed is not used kernel/trace/ring_buffer.c:850: warning: value computed is not used Add a "(void)" to fix this warning. Signed-off-by: Lai Jiangshan --- diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index e648ba4..d371279 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -846,8 +846,8 @@ static int rb_tail_page_update(struct ring_buffer_per_cpu *cpu_buffer, * not come in and change it. In which case, we * do not want to modify it. */ - local_cmpxchg(&next_page->write, old_write, val); - local_cmpxchg(&next_page->entries, old_entries, eval); + (void)local_cmpxchg(&next_page->write, old_write, val); + (void)local_cmpxchg(&next_page->entries, old_entries, eval); /* * No need to worry about races with clearing out the commit.