NUD_NONE
error = neigh_update(entry->neigh, NULL, NUD_NONE,
neigh->nud_state = NUD_NONE;
state = NUD_NONE;
ndm->ndm_state = NUD_NONE;
n->nud_state = NUD_NONE;
n->nud_state = NUD_NONE;
int state = NUD_NONE;