From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757442AbcHYNW5 (ORCPT ); Thu, 25 Aug 2016 09:22:57 -0400 Received: from mail-pa0-f67.google.com ([209.85.220.67]:36128 "EHLO mail-pa0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754246AbcHYNW4 (ORCPT ); Thu, 25 Aug 2016 09:22:56 -0400 From: "seokhoon.yoon" To: Ingo Molnar Cc: Peter Zijlstra , iamyooon@gmail.com, linux-kernel@vger.kernel.org Subject: [RESEND PATCH 1/1] sched: remove duplicated init_task's preempt_notifiers init Date: Thu, 25 Aug 2016 22:22:21 +0900 Message-Id: <1472131341-5500-1-git-send-email-iamyooon@gmail.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org init_task's preempt_notifiers is initialized at two times. 1) sched_init() -> INIT_HLIST_HEAD(&init_task.preempt_notifiers) 2) sched_init() -> init_idle(current,) <--- current task is init_task at this time -> __sched_fork(,current) -> INIT_HLIST_HEAD(&p->preempt_notifiers) I think first one is needless, remove it. Signed-off-by: seokhoon.yoon --- kernel/sched/core.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 5c883fe..5760f62 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7482,10 +7482,6 @@ void __init sched_init(void) set_load_weight(&init_task); -#ifdef CONFIG_PREEMPT_NOTIFIERS - INIT_HLIST_HEAD(&init_task.preempt_notifiers); -#endif - /* * The boot idle thread does lazy MMU switching as well: */ -- 1.9.1