Merge "cpu-hotplug: Always use real time scheduling when hotplugging a CPU"

	return ret;

}

static int switch_to_rt_policy(void)

{

	struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };

	unsigned int policy = current->policy;

	int err;

	/* Nobody should be attempting hotplug from these policy contexts. */

	if (policy == SCHED_BATCH || policy == SCHED_IDLE ||

					policy == SCHED_DEADLINE)

		return -EPERM;

	if (policy == SCHED_FIFO || policy == SCHED_RR)

		return 1;

	/* Only SCHED_NORMAL left. */

	err = sched_setscheduler_nocheck(current, SCHED_FIFO, &param);

	return err;

}

static int switch_to_fair_policy(void)

{

	struct sched_param param = { .sched_priority = 0 };

	return sched_setscheduler_nocheck(current, SCHED_NORMAL, &param);

}

int cpu_up(unsigned int cpu)

{

	int err = 0;

	int switch_err = 0;

	switch_err = switch_to_rt_policy();

	if (switch_err < 0)

		return switch_err;

	if (!cpu_possible(cpu)) {

		pr_err("can't online cpu %d because it is not configured as may-hotadd at boot time\n",

out:

	cpu_maps_update_done();

	if (!switch_err) {

		switch_err = switch_to_fair_policy();

		pr_err("Hotplug policy switch err. Task %s pid=%d\n",

					current->comm, current->pid);

	}

	return err;

}

EXPORT_SYMBOL_GPL(cpu_up);