RBT_NEXT
ni = RBT_NEXT(ieee80211_tree, ni);
ni = RBT_NEXT(ieee80211_tree, ni);
next_ni = RBT_NEXT(ieee80211_tree, ni);
nextbs = RBT_NEXT(ieee80211_tree, ni);
next_ni = RBT_NEXT(ieee80211_tree, ni);
next_ni = RBT_NEXT(ieee80211_tree, ni);
next_ni = RBT_NEXT(ieee80211_tree, ni);
(_e) = RBT_NEXT(_name, (_e)))
(_e) != NULL && ((_n) = RBT_NEXT(_name, (_e)), 1); \