RBT_PROTOTYPE
RBT_PROTOTYPE(ieee80211_tree, ieee80211_node, ni_node, ieee80211_node_cmp);
RBT_PROTOTYPE(ieee80211_ess_tree, ieee80211_ess_rbt, ess_rbt, ieee80211_ess_cmp);
RBT_PROTOTYPE(btshead, btnode, entry, btcmp);
RBT_PROTOTYPE(leaktree, leaknode, entry, leakcmp);