From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752132Ab1GSU6g (ORCPT ); Tue, 19 Jul 2011 16:58:36 -0400 Received: from g4t0014.houston.hp.com ([15.201.24.17]:4630 "EHLO g4t0014.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751787Ab1GSU6e (ORCPT ); Tue, 19 Jul 2011 16:58:34 -0400 Message-ID: <4E25F006.2010205@hp.com> Date: Tue, 19 Jul 2011 14:58:46 -0600 From: Terry Loftin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.18) Gecko/20110617 Lightning/1.0b2 Thunderbird/3.1.11 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org, Ingo Molnar , Peter Zijlstra CC: Bob Montgomery Subject: [PATCH 1/2] sched: Fix "divide error: 0000" in find_busiest_group Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Correct the protection expression in update_cpu_power() to avoid setting rq->cpu_power to zero. Signed-off-by: Terry Loftin Signed-off-by: Bob Montgomery --- diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 0c26e2d..9c50020 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -2549,7 +2549,7 @@ static void update_cpu_power(struct sched_domain *sd, int cpu) power *= scale_rt_power(cpu); power >>= SCHED_LOAD_SHIFT; - if (!power) + if ((u32)power == 0) power = 1; cpu_rq(cpu)->cpu_power = power;