KVADDR
*r_addr = KVADDR(n);
if (KVADDR(p) == (void *)addr)
return (KVADDR(ed));
if (KVADDR(p) == addr) {
for (ed = sc->sc_dmas; ed != NULL && KVADDR(ed) != start;
for (ed = sc->sc_dmas; ed != NULL && KVADDR(ed) != start;