ieee80211_syncflag_ht
ieee80211_syncflag_ht(vap, IEEE80211_FHT_HT);
ieee80211_syncflag_ht(vap, -IEEE80211_FHT_HT);
ieee80211_syncflag_ht(vap, IEEE80211_FHT_USEHT40);
ieee80211_syncflag_ht(vap, -IEEE80211_FHT_USEHT40);
void ieee80211_syncflag_ht(struct ieee80211vap *, int flag);