static ssize_t show_debug_level(struct device *dev, struct device_attribute *attr, char *buf)
{
	ssize_t ret = 0;

	ret += snprintf(buf+ret, PAGE_SIZE-ret, "%d", gpu_get_debug_level());

	if (ret < PAGE_SIZE - 1) {
		ret += snprintf(buf+ret, PAGE_SIZE-ret, "\n");
	} else {
		buf[PAGE_SIZE-2] = '\n';
		buf[PAGE_SIZE-1] = '\0';
		ret = PAGE_SIZE-1;
	}

	return ret;
}
static ssize_t show_debug_level(struct device *dev, struct device_attribute *attr, char *buf)
{
	ssize_t ret = 0;

	ret += snprintf(buf+ret, PAGE_SIZE-ret, "[Current] %d (%d ~ %d)",
				gpu_get_debug_level(), DVFS_DEBUG_START+1, DVFS_DEBUG_END-1);

	if (ret < PAGE_SIZE - 1) {
		ret += snprintf(buf+ret, PAGE_SIZE-ret, "\n");
	} else {
		buf[PAGE_SIZE-2] = '\n';
		buf[PAGE_SIZE-1] = '\0';
		ret = PAGE_SIZE-1;
	}

	return ret;
}