From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755267AbeEHNi4 (ORCPT ); Tue, 8 May 2018 09:38:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:60276 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755237AbeEHNiv (ORCPT ); Tue, 8 May 2018 09:38:51 -0400 From: Frederic Weisbecker To: Ingo Molnar Cc: LKML , Frederic Weisbecker , Sebastian Andrzej Siewior , Tony Luck , Peter Zijlstra , "David S . Miller" , Yoshinori Sato , Michael Ellerman , Helge Deller , Benjamin Herrenschmidt , Paul Mackerras , Thomas Gleixner , Martin Schwidefsky , Rich Felker , Fenghua Yu , Heiko Carstens , "James E . J . Bottomley" Subject: [PATCH 04/11] softirq: Turn default irq_cpustat_t to standard per-cpu Date: Tue, 8 May 2018 15:38:19 +0200 Message-Id: <1525786706-22846-5-git-send-email-frederic@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1525786706-22846-1-git-send-email-frederic@kernel.org> References: <1525786706-22846-1-git-send-email-frederic@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In order to optimize and consolidate softirq mask accesses, let's convert the default irq_cpustat_t implementation to per-CPU standard API. Signed-off-by: Frederic Weisbecker Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Sebastian Andrzej Siewior Cc: David S. Miller Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: James E.J. Bottomley Cc: Helge Deller Cc: Tony Luck Cc: Fenghua Yu Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Yoshinori Sato Cc: Rich Felker --- include/linux/irq_cpustat.h | 4 ++-- kernel/softirq.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/irq_cpustat.h b/include/linux/irq_cpustat.h index 4954948..ddea03c 100644 --- a/include/linux/irq_cpustat.h +++ b/include/linux/irq_cpustat.h @@ -18,8 +18,8 @@ */ #ifndef __ARCH_IRQ_STAT -extern irq_cpustat_t irq_stat[]; /* defined in asm/hardirq.h */ -#define __IRQ_STAT(cpu, member) (irq_stat[cpu].member) +DECLARE_PER_CPU_ALIGNED(irq_cpustat_t, irq_stat); /* defined in asm/hardirq.h */ +#define __IRQ_STAT(cpu, member) (per_cpu(irq_stat.member, cpu)) #endif /* arch independent irq_stat fields */ diff --git a/kernel/softirq.c b/kernel/softirq.c index 177de36..c5fafd7 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -49,8 +49,8 @@ */ #ifndef __ARCH_IRQ_STAT -irq_cpustat_t irq_stat[NR_CPUS] ____cacheline_aligned; -EXPORT_SYMBOL(irq_stat); +DEFINE_PER_CPU_ALIGNED(irq_cpustat_t, irq_stat); +EXPORT_PER_CPU_SYMBOL(irq_stat); #endif static struct softirq_action softirq_vec[NR_SOFTIRQS] __cacheline_aligned_in_smp; -- 2.7.4