rxe_odp_map_range_and_lock
err = rxe_odp_map_range_and_lock(mr, iova, length, flags);
err = rxe_odp_map_range_and_lock(mr, iova, sizeof(char),
err = rxe_odp_map_range_and_lock(mr, iova, length,
err = rxe_odp_map_range_and_lock(mr, iova, sizeof(value),