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sched / idle: Call idle_set_state() from cpuidle_enter_state()

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Introduce a wrapper function around idle_set_state() called
sched_idle_set_state() that will pass this_rq() to it as the
first argument and make cpuidle_enter_state() call the new
function before and after entering the target state.

At the same time, remove direct invocations of idle_set_state()
from call_cpuidle().

This will allow the invocation of default_idle_call() to be
moved from call_cpuidle() to cpuidle_enter_state() safely
and call_cpuidle() to be simplified a bit as a result.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Preeti U Murthy <[email protected]>
Tested-by: Preeti U Murthy <[email protected]>
Tested-by: Sudeep Holla <[email protected]>
Acked-by: Kevin Hilman <[email protected]>
This commit is contained in:
Rafael J. Wysocki 2015-05-10 01:18:03 +02:00
commit faad384928
3 changed files with 18 additions and 6 deletions
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6
drivers/cpuidle/cpuidle.c
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@ -170,6 +170,9 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
if (broadcast && tick_broadcast_enter())
return -EBUSY;
/* Take note of the planned idle state. */
sched_idle_set_state(target_state);
trace_cpu_idle_rcuidle(index, dev->cpu);
time_start = ktime_get();
@ -178,6 +181,9 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
time_end = ktime_get();
trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);
/* The cpu is no longer idle or about to enter idle. */
sched_idle_set_state(NULL);
if (broadcast) {
if (WARN_ON_ONCE(!irqs_disabled()))
local_irq_disable();