/*
* Enter an interrupt context.
*/
void irq_enter(void)
{
__irq_enter();
#ifdef CONFIG_NO_HZ
if (idle_cpu(smp_processor_id()))
tick_nohz_update_jiffies();
#endif
}
static inline void tick_check_nohz(int cpu)
{
struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
ktime_t now;
if (!ts->idle_active && !ts->tick_stopped)
return;
now = ktime_get();
if (ts->idle_active)
tick_nohz_stop_idle(cpu, now);
if (ts->tick_stopped) {
tick_nohz_update_jiffies(now);
tick_nohz_kick_tick(cpu, now);
}
}