mhioc_register_t
mhioc_register_t *ptr = (mhioc_register_t *)usr_bufp;
mhioc_register_t reg;
sizeof (mhioc_register_t), flag) != 0) {
mhioc_register_t reg;
sizeof (mhioc_register_t), flag) != 0) {
mhioc_register_t mhd_reg;