IEEE80211_DUR_DS_SHORT_PREAMBLE 3452 dev/ic/atw.c   		pre += IEEE80211_DUR_DS_SHORT_PREAMBLE +
IEEE80211_DUR_DS_SHORT_PREAMBLE 2969 dev/ic/rtw.c   		pre += IEEE80211_DUR_DS_SHORT_PREAMBLE +
IEEE80211_DUR_DS_SHORT_PREAMBLE  576 net80211/ieee80211.h     (IEEE80211_DUR_DS_LONG_PREAMBLE - IEEE80211_DUR_DS_SHORT_PREAMBLE)