vma_add_ufence
vma_add_ufence(op->map.vma, ufence);
vma_add_ufence(op->remap.prev, ufence);
vma_add_ufence(op->remap.next, ufence);
vma_add_ufence(gpuva_to_vma(op->base.prefetch.va), ufence);