tt_unbound
ttm->state = tt_unbound;
ttm->state = tt_unbound;
ttm->state = tt_unbound;
ttm->state = tt_unbound;
ttm->state = tt_unbound;
ttm->state = tt_unbound;
if (ttm->state == tt_unbound)
ttm->state = tt_unbound;
BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);