From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752511Ab1IPFv7 (ORCPT ); Fri, 16 Sep 2011 01:51:59 -0400 Received: from mga02.intel.com ([134.134.136.20]:33679 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752365Ab1IPFv6 (ORCPT ); Fri, 16 Sep 2011 01:51:58 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,351,1309762800"; d="scan'208";a="49037829" From: Wang Xingchao To: linux-kernel@vger.kernel.org Cc: mingo@elte.hu, peterz@infradead.org, yong.zhang0@gmail.com, alex.shi@intel.com, Wang Xingchao Subject: [PATCH] cfs: NULL pointer check Date: Fri, 16 Sep 2011 13:48:53 -0400 Message-Id: <1316195333-12374-1-git-send-email-xingchao.wang@intel.com> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org se maybe NULL if cfs_rq->rb_leftmost is NULL Signed-off-by: Wang Xingchao --- kernel/sched_fair.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index fef0bfd..109b232 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1130,6 +1130,10 @@ check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr) return; se = __pick_first_entity(cfs_rq); + + if (!se) + return; + delta = curr->vruntime - se->vruntime; if (delta < 0) -- 1.7.1