static int really_probe_debug(struct device *dev, struct device_driver *drv)
{
	ktime_t calltime, rettime;
	int ret;

	calltime = ktime_get();
	ret = really_probe(dev, drv);
	rettime = ktime_get();
	pr_debug("probe of %s returned %d after %lld usecs\n",
		 dev_name(dev), ret, ktime_us_delta(rettime, calltime));
	return ret;
}
static int really_probe_debug(struct device *dev, struct device_driver *drv)
{
	ktime_t calltime, rettime;
	int ret;

	calltime = ktime_get();
	ret = really_probe(dev, drv);
	rettime = ktime_get();
	pr_debug("probe of %s returned %d after %lld usecs\n",
		 dev_name(dev), ret, ktime_us_delta(rettime, calltime));
	return ret;
}