devinfo_children_walk_data_t
devinfo_children_walk_data_t *dic;
dic = mdb_alloc(sizeof (devinfo_children_walk_data_t), UM_SLEEP);
devinfo_children_walk_data_t *dic = wsp->walk_data;
mdb_free(wsp->walk_data, sizeof (devinfo_children_walk_data_t));