/* Construct a dummy mapping that only returns zeros  */
static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv)
/* Construct a dummy mapping that only returns zeros  */
static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv)
{
	if (argc != 0) {
		ti->error = "No arguments required";
		return -EINVAL;
	}
	return 0;
}