Function intr_map_get_isrc

freebsd/kern/subr_intr.c:1583–1595

static struct mtx irq_map_lock;

static struct intr_irqsrc *
intr_map_get_isrc(u_int res_id)
{
	struct intr_irqsrc *isrc;

	isrc = NULL;
	mtx_lock(&irq_map_lock);
	if (res_id < irq_map_count && irq_map[res_id] != NULL)
		isrc = irq_map[res_id]->isrc;
	mtx_unlock(&irq_map_lock);

	return (isrc);
}

static void
intr_map_set_isrc(u_int res_id, struct intr_irqsrc *isrc)