--- net/mac80211/main.c

+++ net/mac80211/main.c

@@ -859,6 +859,8 @@ int ieee80211_register_hw(struct ieee802

* and we need some headroom for passing the frame to monitor

* interfaces, but never both at the same time.

*/

+ BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=

+ sizeof(struct ieee80211_tx_status_rtap_hdr));

local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,

sizeof(struct ieee80211_tx_status_rtap_hdr));