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