vop_old_whiteout
DO_OPS(ops, error, &ap, vop_old_whiteout);
vop_old_whiteout(*(dvp)->v_ops, dvp, cnp, flags)
int (*vop_old_whiteout)(struct vop_old_whiteout_args *);
int vop_old_whiteout(struct vop_ops *ops, struct vnode *dvp,
.vop_old_whiteout = ufs_whiteout