static void __device_driver_lock(struct device *dev, struct device *parent)
{
	if (parent && dev->bus->need_parent_lock)
		device_lock(parent);
	device_lock(dev);
}
static void __device_driver_lock(struct device *dev, struct device *parent)
{
	if (parent && dev->bus->need_parent_lock)
		device_lock(parent);
	device_lock(dev);
}