USHM_OBJ_UMTX
LIST_INIT(USHM_OBJ_UMTX(object));
if (LIST_EMPTY(USHM_OBJ_UMTX(object)))
LIST_FOREACH_SAFE(reg, USHM_OBJ_UMTX(object), ushm_obj_link, reg1) {
LIST_INSERT_HEAD(USHM_OBJ_UMTX(key->info.shared.object), reg,