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Date: Wed, 16 Sep 2015 22:37:00 +0800 From: Jisheng Zhang <jszhang@...vell.com> To: <linux@....linux.org.uk> CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, Jisheng Zhang <jszhang@...vell.com> Subject: [PATCH] arm: 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@...vell.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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