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Merge back new cpuidle material for v4.7.

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This commit is contained in:
Rafael J. Wysocki 2016-05-06 22:08:46 +02:00
commit fd7c3c29f9
6 changed files with 153 additions and 10 deletions
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14
drivers/cpuidle/cpuidle.c
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@ -173,7 +173,7 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
struct cpuidle_state *target_state = &drv->states[index];
bool broadcast = !!(target_state->flags & CPUIDLE_FLAG_TIMER_STOP);
ktime_t time_start, time_end;
u64 time_start, time_end;
s64 diff;
/*
@ -195,13 +195,13 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
sched_idle_set_state(target_state);
trace_cpu_idle_rcuidle(index, dev->cpu);
time_start = ktime_get();
time_start = local_clock();
stop_critical_timings();
entered_state = target_state->enter(dev, drv, index);
start_critical_timings();
time_end = ktime_get();
time_end = local_clock();
trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);
/* The cpu is no longer idle or about to enter idle. */
@ -217,7 +217,11 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
if (!cpuidle_state_is_coupled(drv, entered_state))
local_irq_enable();
diff = ktime_to_us(ktime_sub(time_end, time_start));
/*
* local_clock() returns the time in nanosecond, let's shift
* by 10 (divide by 1024) to have microsecond based time.
*/
diff = (time_end - time_start) >> 10;
if (diff > INT_MAX)
diff = INT_MAX;
@ -433,6 +437,8 @@ static void __cpuidle_unregister_device(struct cpuidle_device *dev)
list_del(&dev->device_list);
per_cpu(cpuidle_devices, dev->cpu) = NULL;
module_put(drv->owner);
dev->registered = 0;
}
static void __cpuidle_device_init(struct cpuidle_device *dev)