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

#include <linux/mutex.h>

#include <linux/sched.h>

#include <linux/sched/clock.h>

#include <linux/sched/idle.h>

#include <linux/notifier.h>

#include <linux/pm_qos.h>

#include <linux/cpu.h>

#ifdef CONFIG_SMP

static void wake_up_idle_cpus(void *v)

{

	int cpu;

	struct cpumask cpus;

	if (v) {

		cpumask_andnot(&cpus, v, cpu_isolated_mask);

		cpumask_and(&cpus, &cpus, cpu_online_mask);

	} else

		cpumask_andnot(&cpus, cpu_online_mask, cpu_isolated_mask);

	preempt_disable();

	for_each_cpu(cpu, &cpus) {

		if (cpu == smp_processor_id())

			continue;

		wake_up_if_idle(cpu);

	}

	preempt_enable();

}

/*

 * 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();

	wake_up_idle_cpus(v);

	return NOTIFY_OK;

}