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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-05-06 22:08:46 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-05-06 22:08:46 +0200 |
| commit | fd7c3c29f9abab50a84fd4fd6811129641c53b2f (patch) | |
| tree | 907eb7ac29bdd4ab44f0e09bda8d54517cb4ebdb /drivers/cpuidle/cpuidle.c | |
| parent | 625fe4f8ffc1b915248558481bb94249f6bd411c (diff) | |
| parent | e93e59ce5b85e6c2b444f09fd1f707274ec066dc (diff) | |
| download | linux-fd7c3c29f9abab50a84fd4fd6811129641c53b2f.tar.bz2 | |
Merge back new cpuidle material for v4.7.
Diffstat (limited to 'drivers/cpuidle/cpuidle.c')
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index f996efc56605..2b8e6ce62e81 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -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) |