static int snooze_loop()

in cpuidle-pseries.c [36:71]

• 24 lines of code
• 4 McCabe index (conditional complexity)

static int snooze_loop(struct cpuidle_device *dev,
			struct cpuidle_driver *drv,
			int index)
{
	u64 snooze_exit_time;

	set_thread_flag(TIF_POLLING_NRFLAG);

	pseries_idle_prolog();
	local_irq_enable();
	snooze_exit_time = get_tb() + snooze_timeout;

	while (!need_resched()) {
		HMT_low();
		HMT_very_low();
		if (likely(snooze_timeout_en) && get_tb() > snooze_exit_time) {
			/*
			 * Task has not woken up but we are exiting the polling
			 * loop anyway. Require a barrier after polling is
			 * cleared to order subsequent test of need_resched().
			 */
			clear_thread_flag(TIF_POLLING_NRFLAG);
			smp_mb();
			break;
		}
	}

	HMT_medium();
	clear_thread_flag(TIF_POLLING_NRFLAG);

	local_irq_disable();

	pseries_idle_epilog();

	return index;
}