ib_destroy_usecnt
ret = ib_destroy_usecnt(&uxrcd->refcnt, why, uobject);
ret = ib_destroy_usecnt(&pd->usecnt, why, uobject);
ret = ib_destroy_usecnt(&counters->usecnt, why, uobject);
ret = ib_destroy_usecnt(&dm->usecnt, why, uobject);
ret = ib_destroy_usecnt(&action->usecnt, why, uobject);