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 <jszh...@marvell.com>
---
arch/arm/kernel/process.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index f192a2a..aa78e09 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -28,6 +28,7 @@
#include <linux/random.h>
#include <linux/hw_breakpoint.h>
#include <linux/leds.h>
+#include <trace/events/power.h>
#include <asm/processor.h>
#include <asm/thread_notify.h>
@@ -66,11 +67,13 @@ void (*arm_pm_idle)(void);
void arch_cpu_idle(void)
{
+ trace_cpu_idle_rcuidle(1, smp_processor_id());
if (arm_pm_idle)
arm_pm_idle();
else
cpu_do_idle();
local_irq_enable();
+ trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
}
void arch_cpu_idle_prepare(void)
--
2.5.1
--
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