pre_announced_chanswitch(struct net_device *dev, u_int32_t channel, u_int32_t tbtt) {
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;
pre_announced_chanswitch(struct net_device *dev, u_int32_t channel, u_int32_t tbtt) {
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;