untraverse
dvp = untraverse(dvp, zone_rootvp);
cs->vp = untraverse(cs->vp, zone_rootvp);
stubvp = untraverse(vp, ZONE_ROOTVP());
vp = untraverse(vp, ne->exi_root->exi_vp);
dvp = untraverse(dvp, zone_rootvp);
extern vnode_t *untraverse(vnode_t *, vnode_t *);