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cpuidle / menu: move repeated correction factor check to init 

In menu_select function we check for correction factor every time.
If it is zero we are initializing to unity. Hence move it to init function
and initialise by unity, hence avoid repeated comparisons.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Reviewed-by: Tuukka Tikkanen <tuukka.tikkanen@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Chander Kashyap 2014-04-22 18:08:04 +05:30 committed by Rafael J. Wysocki
parent 3836785a1b
commit bed4d597a0
1 changed files with 8 additions and 7 deletions
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15
drivers/cpuidle/governors/menu.c
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@ -310,13 +310,6 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev)
data->bucket = which_bucket(data->next_timer_us); data->bucket = which_bucket(data->next_timer_us);
/*
* if the correction factor is 0 (eg first time init or cpu hotplug
* etc), we actually want to start out with a unity factor.
*/
if (data->correction_factor[data->bucket] == 0)
data->correction_factor[data->bucket] = RESOLUTION * DECAY;
/* /*
* Force the result of multiplication to be 64 bits even if both * Force the result of multiplication to be 64 bits even if both
* operands are 32 bits. * operands are 32 bits.
@ -466,9 +459,17 @@ static int menu_enable_device(struct cpuidle_driver *drv,
struct cpuidle_device *dev) struct cpuidle_device *dev)
{ {
struct menu_device *data = &per_cpu(menu_devices, dev->cpu); struct menu_device *data = &per_cpu(menu_devices, dev->cpu);
int i;
memset(data, 0, sizeof(struct menu_device)); memset(data, 0, sizeof(struct menu_device));
/*
* if the correction factor is 0 (eg first time init or cpu hotplug
* etc), we actually want to start out with a unity factor.
*/
for(i = 0; i < BUCKETS; i++)
data->correction_factor[i] = RESOLUTION * DECAY;
return 0; return 0;
} }