relookup
error = relookup(dvp, &vp, cnp, 0);
error = relookup(ap->a_dvp, &vp, ap->a_cnp, 0);
if ((error = relookup(dvp, vpp, cn, 0))) {
if ((error = relookup(udvp, &vp, &cn, 0)) != 0)
error = relookup(tdvp, &tnd.ni_vp, &tnd.ni_cnd, 0);
error = relookup(fromnd.ni_dvp, &fromnd.ni_vp, &fromnd.ni_cnd, 0);
int relookup(struct vnode *, struct vnode **, struct componentname *, int);
error = relookup(dvp, &vp, cnp, 0 /* dummy */);
error = relookup(dvp, &vp, cnp, 0 /* dummy */);
error = relookup(dvp, &vp, cnp, 0 /* dummy */);