--- drivers/net/wireless/ath/ath9k/ath9k.h

+++ drivers/net/wireless/ath/ath9k/ath9k.h

@@ -368,6 +368,7 @@ void ath_tx_aggr_start(struct ath_softc

u16 tid, u16 *ssn);

void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid);

void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid);

+void ath9k_enable_ps(struct ath_softc *sc);

/********/

/* VIFs */