Commit 096b3224 authored Sep 16, 2015 by Jisheng Zhang Committed by Catalin Marinas Oct 19, 2015

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>

parent 21539939

arch/arm64/kernel/process.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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

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