Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755136AbdDDRU3 (ORCPT ); Tue, 4 Apr 2017 13:20:29 -0400 Received: from foss.arm.com ([217.140.101.70]:47706 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932478AbdDDRTQ (ORCPT ); Tue, 4 Apr 2017 13:19:16 -0400 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Mark Rutland , Catalin Marinas , Daniel Lezcano , Will Deacon , Scott Wood , Hanjun Guo , Ding Tianhong , dann frazier , Thomas Gleixner Subject: [PATCH v3 14/18] arm64: arch_timer: Save cntkctl_el1 as a per-cpu variable Date: Tue, 4 Apr 2017 18:18:22 +0100 Message-Id: <20170404171826.25030-15-marc.zyngier@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170404171826.25030-1-marc.zyngier@arm.com> References: <20170404171826.25030-1-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1206 Lines: 35 As we're about to allow per CPU cntkctl_el1 configuration, we cannot rely on the register value to be common when performing power management. Let's turn saved_cntkctl into a per-cpu variable. Signed-off-by: Marc Zyngier --- drivers/clocksource/arm_arch_timer.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 395f5d95a737..5c114da0ed71 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -839,14 +839,14 @@ static int arch_timer_dying_cpu(unsigned int cpu) } #ifdef CONFIG_CPU_PM -static unsigned int saved_cntkctl; +static DEFINE_PER_CPU(unsigned long, saved_cntkctl); static int arch_timer_cpu_pm_notify(struct notifier_block *self, unsigned long action, void *hcpu) { if (action == CPU_PM_ENTER) - saved_cntkctl = arch_timer_get_cntkctl(); + __this_cpu_write(saved_cntkctl, arch_timer_get_cntkctl()); else if (action == CPU_PM_ENTER_FAILED || action == CPU_PM_EXIT) - arch_timer_set_cntkctl(saved_cntkctl); + arch_timer_set_cntkctl(__this_cpu_read(saved_cntkctl)); return NOTIFY_OK; } -- 2.11.0