nvkm_ucgrp
nvkm_object_ctor(&nvkm_ucgrp, oclass, &ucgrp->object);
#define nvkm_ucgrp(p) container_of((p), struct nvkm_ucgrp, object)
struct nvkm_cgrp *cgrp = nvkm_ucgrp(oclass->parent)->cgrp;
struct nvkm_cgrp *cgrp = nvkm_ucgrp(object)->cgrp;
struct nvkm_ucgrp *ucgrp = nvkm_ucgrp(object);
nvkm_ucgrp = {
struct nvkm_ucgrp *ucgrp;