VTOUNION
#define LOWERVP(vp) (VTOUNION(vp)->un_lowervp)
#define UPPERVP(vp) (VTOUNION(vp)->un_uppervp)
un = VTOUNION(vp);
dircache = VTOUNION(vp)->un_dircache;
VTOUNION(vp)->un_dircache = dircache;
if (*vpp++ == VTOUNION(vp)->un_lowervp)
VTOUNION(vp)->un_dircache = 0;
VTOUNION(nvp)->un_hooknode = true;
VTOUNION(nvp)->un_dircache = dircache;
struct union_node *un = VTOUNION(vp);
struct union_node *un = VTOUNION(vp);
struct union_node *un = VTOUNION(vp);
struct union_node *un = VTOUNION(ap->a_vp);
struct union_node *un = VTOUNION(ap->a_vp);
struct union_node *dun = VTOUNION(ap->a_dvp);
struct union_node *un = VTOUNION(ap->a_vp);
dun = VTOUNION(ap->a_dvp);
struct union_node *un = VTOUNION(ap->a_vp);
struct union_node *un = VTOUNION(fdvp);
struct union_node *un = VTOUNION(fvp);
struct union_node *un = VTOUNION(tdvp);
struct union_node *un = VTOUNION(tvp);
struct union_node *un = VTOUNION(ap->a_dvp);
struct union_node *dun = VTOUNION(ap->a_dvp);
struct union_node *un = VTOUNION(ap->a_vp);
struct union_node *un = VTOUNION(ap->a_dvp);
struct union_node *un = VTOUNION(ap->a_vp);
struct union_node *un = VTOUNION(vp);
struct union_node *un = VTOUNION(vp);
for (vpp = VTOUNION(vp)->un_dircache; *vpp != NULLVP; vpp++)
un = VTOUNION(ap->a_vp);
struct union_node *dun = VTOUNION(dvp);
struct union_node *un = VTOUNION(ap->a_dvp);
struct union_node *un = VTOUNION(ap->a_dvp);
struct union_node *un = VTOUNION(ap->a_dvp);
struct union_node *un = VTOUNION(ap->a_vp);
struct union_node *un = VTOUNION(ap->a_vp);
struct union_node *un = VTOUNION(vp);
struct union_node *un = VTOUNION(ap->a_vp);
struct union_node *un = VTOUNION(vp);