From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752741Ab0C1DOu (ORCPT ); Sat, 27 Mar 2010 23:14:50 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:61902 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752494Ab0C1DOt (ORCPT ); Sat, 27 Mar 2010 23:14:49 -0400 Message-ID: <4BAEC9C8.8080704@cn.fujitsu.com> Date: Sun, 28 Mar 2010 11:15:20 +0800 From: Lai Jiangshan User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: "Paul E. McKenney" , Ingo Molnar , LKML Subject: [PATCH] rcu: make dead code really dead 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 cleanup: make dead code really dead Signed-off-by: Lai Jiangshan --- diff --git a/kernel/rcutree.c b/kernel/rcutree.c index e6014e1..1947c4e 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1236,11 +1236,11 @@ static void force_quiescent_state(struct rcu_state *rsp, int relaxed) break; /* grace period idle or initializing, ignore. */ case RCU_SAVE_DYNTICK: - - raw_spin_unlock(&rnp->lock); /* irqs remain disabled */ if (RCU_SIGNAL_INIT != RCU_SAVE_DYNTICK) break; /* So gcc recognizes the dead code. */ + raw_spin_unlock(&rnp->lock); /* irqs remain disabled */ + /* Record dyntick-idle state. */ force_qs_rnp(rsp, dyntick_save_progress_counter); raw_spin_lock(&rnp->lock); /* irqs already disabled */