nvif_object_map
ret = nvif_object_map(&disp->caps, NULL, 0);
nvif_object_map(&wndw->wimm.base.user, NULL, 0);
ret = nvif_object_map(&chan->user, NULL, 0);
nvif_object_map(&wndw->wimm.base.user, NULL, 0);
int nvif_object_map(struct nvif_object *, void *, u32);
ret = nvif_object_map(chan->userd, NULL, 0);
nvif_object_map(&buffer->object, NULL, 0);
return nvif_object_map(&device->object, NULL, 0);
ret = nvif_object_map(&mem->object, NULL, 0);
nvif_object_map(&device->user.object, NULL, 0);