hrtimer_hres_active
if (!hrtimer_hres_active(cpu_base))
if (hrtimer_hres_active(cpu_base)) {
if (hrtimer_hres_active(cpu_base))
if (!hrtimer_hres_active(cpu_base) || cpu_base->hang_detected)
if (hrtimer_hres_active(base))
if (!hrtimer_hres_active(cpu_base) && !tick_nohz_is_active())