IPSA_F_USED
excludeflags |= IPSA_F_USED;
retval->ipsa_flags |= IPSA_F_USED;
if (need_unique && !(old_flags & IPSA_F_USED)) {
(walker->ipsa_flags & IPSA_F_USED) &&
assoc->ipsa_flags |= IPSA_F_USED;
assoc->ipsa_flags & IPSA_F_USED) {
assoc->ipsa_flags & IPSA_F_USED) {