sched/idle: Move latency tracing stop/start calls deeper inside the idle loop

[karo-tx-linux.git] / drivers / cpuidle / cpuidle.c

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index e8e2775c3821e26dc179ea6e300025d0cf6e75e5..a5d9f2e470ea1fc9f94536f230d60c0633933dda 100644 (file)
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -118,6 +118,7 @@ static void enter_freeze_proper(struct cpuidle_driver *drv,
         * cpuidle mechanism enables interrupts and doing that with timekeeping
         * suspended is generally unsafe.
         */
+       stop_critical_timings();
        drv->states[index].enter_freeze(dev, drv, index);
        WARN_ON(!irqs_disabled());
        /*
@@ -126,6 +127,7 @@ static void enter_freeze_proper(struct cpuidle_driver *drv,
         * critical sections, so tell RCU about that.
         */
        RCU_NONIDLE(tick_unfreeze());
+       start_critical_timings();
 }
 
 /**
@@ -190,7 +192,9 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
        trace_cpu_idle_rcuidle(index, dev->cpu);
        time_start = ktime_get();
 
+       stop_critical_timings();
        entered_state = target_state->enter(dev, drv, index);
+       start_critical_timings();
 
        time_end = ktime_get();
        trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);