예제 #1
0
/**
 * cpuidle_switch_governor - changes the governor
 * @gov: the new target governor
 *
 * NOTE: "gov" can be NULL to specify disabled
 * Must be called with cpuidle_lock acquired.
 */
int cpuidle_switch_governor(struct cpuidle_governor *gov)
{
	struct cpuidle_device *dev;

	if (gov == cpuidle_curr_governor)
		return 0;

	cpuidle_uninstall_idle_handler();

	if (cpuidle_curr_governor) {
		list_for_each_entry(dev, &cpuidle_detected_devices, device_list)
			cpuidle_disable_device(dev);
		module_put(cpuidle_curr_governor->owner);
	}

	cpuidle_curr_governor = gov;

	if (gov) {
		if (!try_module_get(cpuidle_curr_governor->owner))
			return -EINVAL;
		list_for_each_entry(dev, &cpuidle_detected_devices, device_list)
			cpuidle_enable_device(dev);
		cpuidle_install_idle_handler();
		printk(KERN_INFO "cpuidle: using governor %s\n", gov->name);
	}

	return 0;
}
예제 #2
0
void cpuidle_pause_and_lock(void)
{
	mutex_lock(&cpuidle_lock);
	cpuidle_uninstall_idle_handler();
}