From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755529AbaEVM2n (ORCPT ); Thu, 22 May 2014 08:28:43 -0400 Received: from terminus.zytor.com ([198.137.202.10]:51293 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755509AbaEVM2l (ORCPT ); Thu, 22 May 2014 08:28:41 -0400 Date: Thu, 22 May 2014 05:27:47 -0700 From: tip-bot for Dongsheng Yang Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, keescook@chromium.org, peterz@infradead.org, tglx@linutronix.de, yangds.fnst@cn.fujitsu.com Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, keescook@chromium.org, peterz@infradead.org, tglx@linutronix.de, yangds.fnst@cn.fujitsu.com In-Reply-To: <1399541715-19568-1-git-send-email-yangds.fnst@cn.fujitsu.com> References: <1399541715-19568-1-git-send-email-yangds.fnst@cn.fujitsu.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/core] sched: Use clamp() and clamp_val() to make sys_nice() more readable Git-Commit-ID: a9467fa3cd2d5bf39e7cb7d0706d29d7ef4df212 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: a9467fa3cd2d5bf39e7cb7d0706d29d7ef4df212 Gitweb: http://git.kernel.org/tip/a9467fa3cd2d5bf39e7cb7d0706d29d7ef4df212 Author: Dongsheng Yang AuthorDate: Thu, 8 May 2014 18:35:15 +0900 Committer: Ingo Molnar CommitDate: Thu, 22 May 2014 11:16:31 +0200 sched: Use clamp() and clamp_val() to make sys_nice() more readable Suggested-by: Kees Cook Signed-off-by: Dongsheng Yang Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1399541715-19568-1-git-send-email-yangds.fnst@cn.fujitsu.com Signed-off-by: Ingo Molnar --- kernel/sched/core.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 6340c60..f5605b6 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3057,17 +3057,10 @@ SYSCALL_DEFINE1(nice, int, increment) * We don't have to worry. Conceptually one call occurs first * and we have a single winner. */ - if (increment < -40) - increment = -40; - if (increment > 40) - increment = 40; - + increment = clamp(increment, -NICE_WIDTH, NICE_WIDTH); nice = task_nice(current) + increment; - if (nice < MIN_NICE) - nice = MIN_NICE; - if (nice > MAX_NICE) - nice = MAX_NICE; + nice = clamp_val(nice, MIN_NICE, MAX_NICE); if (increment < 0 && !can_nice(current, nice)) return -EPERM;