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sched / idle: Move the default idle call code to a separate function 

Move the code under the "use_default" label in cpuidle_idle_call()
into a separate (new) function.

This just allows the subsequent changes to be more stratightforward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
hifive-unleashed-5.1
Rafael J. Wysocki 2015-05-04 22:53:22 +02:00
parent 5ebe6afaf0
commit 82f663277d
1 changed files with 24 additions and 19 deletions
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43
kernel/sched/idle.c
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@ -67,6 +67,18 @@ void __weak arch_cpu_idle(void)
local_irq_enable();
}
static void default_idle_call(void)
{
/*
* We can't use the cpuidle framework, let's use the default idle
* routine.
*/
if (current_clr_polling_and_test())
local_irq_enable();
else
arch_cpu_idle();
}
/**
* cpuidle_idle_call - the main idle function
*
@ -105,8 +117,10 @@ static void cpuidle_idle_call(void)
*/
rcu_idle_enter();
if (cpuidle_not_available(drv, dev))
goto use_default;
if (cpuidle_not_available(drv, dev)) {
default_idle_call();
goto exit_idle;
}
/*
* Suspend-to-idle ("freeze") is a system state in which all user space
@ -134,8 +148,10 @@ static void cpuidle_idle_call(void)
next_state = cpuidle_select(drv, dev);
}
/* Fall back to the default arch idle method on errors. */
if (next_state < 0)
goto use_default;
if (next_state < 0) {
default_idle_call();
goto exit_idle;
}
/*
* The idle task must be scheduled, it is pointless to
@ -162,8 +178,10 @@ static void cpuidle_idle_call(void)
/* The cpu is no longer idle or about to enter idle. */
idle_set_state(this_rq(), NULL);
if (entered_state == -EBUSY)
goto use_default;
if (entered_state == -EBUSY) {
default_idle_call();
goto exit_idle;
}
/*
* Give the governor an opportunity to reflect on the outcome
@ -182,19 +200,6 @@ exit_idle:
rcu_idle_exit();
start_critical_timings();
return;
use_default:
/*
* We can't use the cpuidle framework, let's use the default
* idle routine.
*/
if (current_clr_polling_and_test())
local_irq_enable();
else
arch_cpu_idle();
goto exit_idle;
}
DEFINE_PER_CPU(bool, cpu_dead_idle);