From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754106AbcIBODY (ORCPT ); Fri, 2 Sep 2016 10:03:24 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:33384 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751971AbcIBODR (ORCPT ); Fri, 2 Sep 2016 10:03:17 -0400 From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Paolo Bonzini , Peter Zijlstra , Wanpeng Li , Eric Dumazet , Ingo Molnar , Mike Galbraith , Rik van Riel Subject: [PATCH 1/5] irqtime: No need for preempt-safe accessors Date: Fri, 2 Sep 2016 16:03:01 +0200 Message-Id: <1472824985-22947-2-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1472824985-22947-1-git-send-email-fweisbec@gmail.com> References: <1472824985-22947-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We can safely use the preempt-unsafe accessors for irqtime when we flush its counters to kcpustat as IRQs are disabled at this time. Cc: Rik van Riel Cc: Paolo Bonzini Cc: Wanpeng Li Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Eric Dumazet Signed-off-by: Frederic Weisbecker --- kernel/sched/cputime.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index b93c72d..f111076 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -82,7 +82,7 @@ static cputime_t irqtime_account_hi_update(cputime_t maxtime) cputime_t irq_cputime; local_irq_save(flags); - irq_cputime = nsecs_to_cputime64(this_cpu_read(cpu_hardirq_time)) - + irq_cputime = nsecs_to_cputime64(__this_cpu_read(cpu_hardirq_time)) - cpustat[CPUTIME_IRQ]; irq_cputime = min(irq_cputime, maxtime); cpustat[CPUTIME_IRQ] += irq_cputime; @@ -97,7 +97,7 @@ static cputime_t irqtime_account_si_update(cputime_t maxtime) cputime_t softirq_cputime; local_irq_save(flags); - softirq_cputime = nsecs_to_cputime64(this_cpu_read(cpu_softirq_time)) - + softirq_cputime = nsecs_to_cputime64(__this_cpu_read(cpu_softirq_time)) - cpustat[CPUTIME_SOFTIRQ]; softirq_cputime = min(softirq_cputime, maxtime); cpustat[CPUTIME_SOFTIRQ] += softirq_cputime; -- 2.7.0