*/
void run_local_timers(void)
{
+ struct tvec_base *base = this_cpu_ptr(&tvec_bases);
+
hrtimer_run_queues();
- raise_softirq(TIMER_SOFTIRQ);
+ /*
+ * We can access this lockless as we are in the timer
+ * interrupt. If there are no timers queued, nothing to do in
+ * the timer softirq.
+ */
+#ifdef CONFIG_PREEMPT_RT_FULL
+ if (irq_work_needs_cpu()) {
+ raise_softirq(TIMER_SOFTIRQ);
+ return;
+ }
+ if (!spin_do_trylock(&base->lock)) {
+ raise_softirq(TIMER_SOFTIRQ);
+ return;
+ }
+#endif
+ if (!base->active_timers)
+ goto out;
+
+ /* Check whether the next pending timer has expired */
+ if (time_before_eq(base->next_timer, jiffies))
+ raise_softirq(TIMER_SOFTIRQ);
+out:
+#ifdef CONFIG_PREEMPT_RT_FULL
+ rt_spin_unlock(&base->lock);
+#endif
+ /* The ; ensures that gcc won't complain in the !RT case */
+ ;
}
#ifdef __ARCH_WANT_SYS_ALARM