sched: Fix HRTICK

#ifdef CONFIG_SCHED_HRTICK

/*

 * Use HR-timers to deliver accurate preemption points.

 *

 * Its all a bit involved since we cannot program an hrt while holding the

 * rq->lock. So what we do is store a state in in rq->hrtick_* and ask for a

 * reschedule event.

 *

 * When we get rescheduled we reprogram the hrtick_timer outside of the

 * rq->lock.

 */

static void hrtick_clear(struct rq *rq)

}

#ifdef CONFIG_SMP

static int __hrtick_restart(struct rq *rq)

{

	struct hrtimer *timer = &rq->hrtick_timer;

	ktime_t time = hrtimer_get_softexpires(timer);

	return __hrtimer_start_range_ns(timer, time, 0, HRTIMER_MODE_ABS_PINNED, 0);

}

/*

 * called from hardirq (IPI) context

 */

	struct rq *rq = arg;

	raw_spin_lock(&rq->lock);

	hrtimer_restart(&rq->hrtick_timer);

	__hrtick_restart(rq);

	rq->hrtick_csd_pending = 0;

	raw_spin_unlock(&rq->lock);

}

	hrtimer_set_expires(timer, time);

	if (rq == this_rq()) {

		hrtimer_restart(timer);

		__hrtick_restart(rq);

	} else if (!rq->hrtick_csd_pending) {

		__smp_call_function_single(cpu_of(rq), &rq->hrtick_csd, 0);

		rq->hrtick_csd_pending = 1;