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cpuidle: add poll_limit_ns to cpuidle_device structure

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Add a poll_limit_ns variable to cpuidle_device structure.

Calculate and configure it in the new cpuidle_poll_time
function, in case its zero.

Individual governors are allowed to override this value.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Marcelo Tosatti
2019-07-03 20:51:26 -03:00
committed by Rafael J. Wysocki
parent fa86ee90eb
commit 259231a045
4 changed files with 45 additions and 9 deletions
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drivers/cpuidle/poll_state.c
+2 -9
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@@ -20,16 +20,9 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev,
local_irq_enable();
if (!current_set_polling_and_test()) {
unsigned int loop_count = 0;
u64 limit = TICK_NSEC;
int i;
u64 limit;
for (i = 1; i < drv->state_count; i++) {
if (drv->states[i].disabled || dev->states_usage[i].disable)
continue;
limit = (u64)drv->states[i].target_residency * NSEC_PER_USEC;
break;
}
limit = cpuidle_poll_time(drv, dev);
while (!need_resched()) {
cpu_relax();