void __init time_init_deferred()

in kernel/time.c [163:202]

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

void __init time_init_deferred(void)
{
	struct resource *resource = NULL;
	struct clock_event_device *ce_dev = &hexagon_clockevent_dev;
	unsigned long flag = IRQF_TIMER | IRQF_TRIGGER_RISING;

	ce_dev->cpumask = cpu_all_mask;

	if (!resource)
		resource = rtos_timer_device.resource;

	/*  ioremap here means this has to run later, after paging init  */
	rtos_timer = ioremap(resource->start, resource_size(resource));

	if (!rtos_timer) {
		release_mem_region(resource->start, resource_size(resource));
	}
	clocksource_register_khz(&hexagon_clocksource, pcycle_freq_mhz * 1000);

	/*  Note: the sim generic RTOS clock is apparently really 18750Hz  */

	/*
	 * Last arg is some guaranteed seconds for which the conversion will
	 * work without overflow.
	 */
	clockevents_calc_mult_shift(ce_dev, sleep_clk_freq, 4);

	ce_dev->max_delta_ns = clockevent_delta2ns(0x7fffffff, ce_dev);
	ce_dev->max_delta_ticks = 0x7fffffff;
	ce_dev->min_delta_ns = clockevent_delta2ns(0xf, ce_dev);
	ce_dev->min_delta_ticks = 0xf;

#ifdef CONFIG_SMP
	setup_percpu_clockdev();
#endif

	clockevents_register_device(ce_dev);
	if (request_irq(ce_dev->irq, timer_interrupt, flag, "rtos_timer", NULL))
		pr_err("Failed to register rtos_timer interrupt\n");
}