From bee67c53a990452c4f3c7a0e9cebfecb5acfbde3 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 4 Apr 2017 17:05:16 +0100 Subject: [PATCH] arm64: arch_timer: Save cntkctl_el1 as a per-cpu variable 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. Acked-by: Thomas Gleixner 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; }