reservation_object_get_excl
f = reservation_object_get_excl(resv);
exclusive = reservation_object_get_excl(bo->tbo.resv);
struct dma_fence *old_fence = reservation_object_get_excl(obj);
old = reservation_object_get_excl(dst);
new = reservation_object_get_excl(src);
work->fence = dma_fence_get(reservation_object_get_excl(new_rbo->tbo.resv));
f = reservation_object_get_excl(resv);
f = reservation_object_get_excl(bo->tbo.resv);
fence = reservation_object_get_excl(&bo->ttm_resv);