infer_cblock
if (!test_and_set_bit(from_cblock(infer_cblock(mq, e)), mq->cache_hit_bits)) {
work.cblock = infer_cblock(mq, e);
work.cblock = infer_cblock(mq, e);
work.cblock = infer_cblock(mq, e);
*cblock = infer_cblock(mq, e);