From mboxrd@z Thu Jan 1 00:00:00 1970 From: jszhang@marvell.com (Jisheng Zhang) Date: Thu, 17 Sep 2015 01:32:40 +0800 Subject: [PATCH v2] arm: add cpu_idle tracepoints to arch_cpu_idle Message-ID: <1442424760-4104-1-git-send-email-jszhang@marvell.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- Since v1: - ignore arm_pm_idle. arch/arm/kernel/process.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 7a7c4ce..83d2dc5 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include @@ -66,11 +67,15 @@ void (*arm_pm_idle)(void); void arch_cpu_idle(void) { - if (arm_pm_idle) + if (arm_pm_idle) { arm_pm_idle(); - else + local_irq_enable(); + } else { + trace_cpu_idle_rcuidle(1, smp_processor_id()); cpu_do_idle(); - local_irq_enable(); + local_irq_enable(); + trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id()); + } } void arch_cpu_idle_prepare(void) -- 2.5.1