ieee80211_node_critsec_begin(ic, s);
IEEE80211_NODE_LOCK(ic);
ieee80211_iterate_nodes(struct ieee80211com *ic, ieee80211_iter_func *f, void *arg){	struct ieee80211_node *ni;	ieee80211_node_critsec_decl(s);	ieee80211_node_critsec_begin(ic, s);	TAILQ_FOREACH(ni, &ic->ic_node, ni_list)		(*f)(arg, ni);	ieee80211_node_critsec_end(ic, s);}