Merge "cpuidle: Wakeup only cpus for which qos has changed."

#ifdef CONFIG_SMP

static void smp_callback(void *v)

{

	/* we already woke the CPU up, nothing more to do */

}

/*

 * This function gets called when a part of the kernel has a new latency

 * requirement.  This means we need to get all processors out of their C-state,

 * and then recalculate a new suitable C-state. Just do a cross-cpu IPI; that

 * wakes them all right up.

 * requirement.  This means we need to get only those processors out of their

 * C-state for which qos requirement is changed, and then recalculate a new

 * suitable C-state. Just do a cross-cpu IPI; that wakes them all right up.

 */

static int cpuidle_latency_notify(struct notifier_block *b,

		unsigned long l, void *v)

{

	wake_up_all_idle_cpus();

	const struct cpumask *cpus;

	cpus = v ?: cpu_online_mask;

	preempt_disable();

	smp_call_function_many(cpus, smp_callback, NULL, 1);

	preempt_enable();

	return NOTIFY_OK;

}