void __irq_entry do_IRQ()

in kernel/irq.c [25:47]

• 20 lines of code
• 2 McCabe index (conditional complexity)

void __irq_entry do_IRQ(struct pt_regs *regs)
{
	unsigned int irq;
	struct pt_regs *old_regs = set_irq_regs(regs);
	trace_hardirqs_off();

	irq_enter();
	irq = xintc_get_irq();
next_irq:
	BUG_ON(!irq);
	generic_handle_irq(irq);

	irq = xintc_get_irq();
	if (irq != -1U) {
		pr_debug("next irq: %d\n", irq);
		++concurrent_irq;
		goto next_irq;
	}

	irq_exit();
	set_irq_regs(old_regs);
	trace_hardirqs_on();
}