Messages in this thread Patch in this message | | | From | "Rafael J. Wysocki" <> | Subject | [PATCH 3/3] cpuidle: teo: Avoid code duplication in conditionals | Date | Wed, 13 Nov 2019 01:10:13 +0100 |
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From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
There are three places in teo_select() where a given amount of time is compared with TICK_NSEC if tick_nohz_tick_stopped() returns true, which is a bit of duplicated code.
Avoid that code duplication by defining a helper function to do the check and using it in all of the places in question.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> --- drivers/cpuidle/governors/teo.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
Index: linux-pm/drivers/cpuidle/governors/teo.c =================================================================== --- linux-pm.orig/drivers/cpuidle/governors/teo.c +++ linux-pm/drivers/cpuidle/governors/teo.c @@ -202,6 +202,11 @@ static void teo_update(struct cpuidle_dr cpu_data->interval_idx = 0; } +static bool teo_time_ok(u64 interval_ns) +{ + return !tick_nohz_tick_stopped() || interval_ns >= TICK_NSEC; +} + /** * teo_find_shallower_state - Find shallower idle state matching given duration. * @drv: cpuidle driver containing state data. @@ -306,8 +311,7 @@ static int teo_select(struct cpuidle_dri * check if the current candidate state is not too * shallow for that role. */ - if (!(tick_nohz_tick_stopped() && - drv->states[idx].target_residency_ns < TICK_NSEC)) { + if (teo_time_ok(drv->states[idx].target_residency_ns)) { prev_max_early_idx = max_early_idx; early_hits = cpu_data->states[i].early_hits; max_early_idx = idx; @@ -333,8 +337,7 @@ static int teo_select(struct cpuidle_dri misses = cpu_data->states[i].misses; if (early_hits < cpu_data->states[i].early_hits && - !(tick_nohz_tick_stopped() && - drv->states[i].target_residency_ns < TICK_NSEC)) { + teo_time_ok(drv->states[i].target_residency_ns)) { prev_max_early_idx = max_early_idx; early_hits = cpu_data->states[i].early_hits; max_early_idx = i; @@ -409,7 +412,7 @@ static int teo_select(struct cpuidle_dri * Avoid spending too much time in an idle state that * would be too shallow. */ - if (!(tick_nohz_tick_stopped() && avg_ns < TICK_NSEC)) { + if (teo_time_ok(avg_ns)) { duration_ns = avg_ns; if (drv->states[idx].target_residency_ns > avg_ns) idx = teo_find_shallower_state(drv, dev,
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