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arm64: add cpu_idle tracepoints to arch_cpu_idle 

Currently, if cpuidle is disabled or not supported, powertop reports
zero wakeups and zero events. This is due to the cpu_idle tracepoints
are missing.

This patch is to make cpu_idle tracepoints always available even if
cpuidle is disabled or not supported.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Jisheng Zhang 2015-09-16 22:23:21 +08:00 committed by Catalin Marinas
parent 215399392f
commit 096b3224d5
1 changed files with 3 additions and 0 deletions
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3
arch/arm64/kernel/process.c
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@ -44,6 +44,7 @@
#include <linux/hw_breakpoint.h>
#include <linux/personality.h>
#include <linux/notifier.h>
#include <trace/events/power.h>
#include <asm/compat.h>
#include <asm/cacheflush.h>
@ -75,8 +76,10 @@ void arch_cpu_idle(void)
* This should do all the clock switching and wait for interrupt
* tricks
*/
trace_cpu_idle_rcuidle(1, smp_processor_id());
cpu_do_idle();
local_irq_enable();
trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
}
#ifdef CONFIG_HOTPLUG_CPU