ieee80211_duration  752 net/mac80211/tx.c 		hdr->duration_id = ieee80211_duration(tx, group_addr, 0);
ieee80211_duration  756 net/mac80211/tx.c 	hdr->duration_id = ieee80211_duration(tx, group_addr,
ieee80211_duration  768 net/mac80211/tx.c 		hdr->duration_id = ieee80211_duration(tx, 0, next_len);