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cpuidle: teo: Get rid of redundant check in teo_update()

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Notice that setting measured_us to UINT_MAX in teo_update() earlier
doesn't change the behavior of the following code, so do that and
eliminate a redundant check used for setting measured_us to UINT_MAX.

This change is not expected to alter functionality.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2019-07-30 12:11:08 +02:00
parent cab09f3d2d
commit b7e7fffd3e
1 changed files with 4 additions and 12 deletions
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16
drivers/cpuidle/governors/teo.c
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@ -123,10 +123,11 @@ static void teo_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
if (cpu_data->time_span_ns >= cpu_data->sleep_length_ns) { if (cpu_data->time_span_ns >= cpu_data->sleep_length_ns) {
/* /*
* One of the safety nets has triggered or this was a timer * One of the safety nets has triggered or the wakeup was close
* wakeup (or equivalent). * enough to the closest timer event expected at the idle state
* selection time to be discarded.
*/ */
measured_us = sleep_length_us; measured_us = UINT_MAX;
} else { } else {
unsigned int lat; unsigned int lat;
@ -188,15 +189,6 @@ static void teo_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
cpu_data->states[idx_timer].hits = hits; cpu_data->states[idx_timer].hits = hits;
} }
/*
* If the total time span between idle state selection and the "reflect"
* callback is greater than or equal to the sleep length determined at
* the idle state selection time, the wakeup is likely to be due to a
* timer event.
*/
if (cpu_data->time_span_ns >= cpu_data->sleep_length_ns)
measured_us = UINT_MAX;
/* /*
* Save idle duration values corresponding to non-timer wakeups for * Save idle duration values corresponding to non-timer wakeups for
* pattern detection. * pattern detection.