umem_walk_step
bufctl_walk_init, umem_walk_step, umem_walk_fini },
freectl_walk_init, umem_walk_step, umem_walk_fini },
freemem_walk_init, umem_walk_step, umem_walk_fini },
umem_walk_init, umem_walk_step, umem_walk_fini },
w.walk_step = umem_walk_step;
extern int umem_walk_step(mdb_walk_state_t *);