static ssize_t block_size_bytes_show(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	return sysfs_emit(buf, "%lx\n", memory_block_size_bytes());
}
static ssize_t block_size_bytes_show(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	return sysfs_emit(buf, "%lx\n", memory_block_size_bytes());
}