TDF_DEADLKTREAT
if ((td->td_flags & TDF_DEADLKTREAT) == 0) {
if ((td->td_flags & TDF_DEADLKTREAT) &&
save = td->td_flags & TDF_DEADLKTREAT;
td->td_flags |= TDF_DEADLKTREAT;
td->td_flags = (td->td_flags & ~TDF_DEADLKTREAT) | save;
save = td->td_flags & TDF_DEADLKTREAT;
td->td_flags |= TDF_DEADLKTREAT;
td->td_flags &= ~TDF_DEADLKTREAT;