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