M_LEADINGSPACE
if (M_LEADINGSPACE(m) >= space) {
if ((off == 0 || offp) && M_LEADINGSPACE(n->m_next) >= hlen &&
i = MHLEN - M_LEADINGSPACE(mb_copy);
i = MHLEN - M_LEADINGSPACE(mm);
KASSERT(M_LEADINGSPACE(m) >= hdrlen,
("leading space %zd", M_LEADINGSPACE(m)));
if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame),
("leading space %zd", M_LEADINGSPACE(m)));
if (M_LEADINGSPACE(_mm) >= _mplen) { \