static void adjust_poll_limit()

in governors/haltpoll.c [78:105]

• 21 lines of code
• 8 McCabe index (conditional complexity)

static void adjust_poll_limit(struct cpuidle_device *dev, u64 block_ns)
{
	unsigned int val;

	/* Grow cpu_halt_poll_us if
	 * cpu_halt_poll_us < block_ns < guest_halt_poll_us
	 */
	if (block_ns > dev->poll_limit_ns && block_ns <= guest_halt_poll_ns) {
		val = dev->poll_limit_ns * guest_halt_poll_grow;

		if (val < guest_halt_poll_grow_start)
			val = guest_halt_poll_grow_start;
		if (val > guest_halt_poll_ns)
			val = guest_halt_poll_ns;

		dev->poll_limit_ns = val;
	} else if (block_ns > guest_halt_poll_ns &&
		   guest_halt_poll_allow_shrink) {
		unsigned int shrink = guest_halt_poll_shrink;

		val = dev->poll_limit_ns;
		if (shrink == 0)
			val = 0;
		else
			val /= shrink;
		dev->poll_limit_ns = val;
	}
}