REQ_INTEGRITY
bid->bio->bi_opf &= ~REQ_INTEGRITY;
bio->bi_opf &= ~REQ_INTEGRITY;
bio->bi_opf &= ~REQ_INTEGRITY;
bio->bi_opf |= REQ_INTEGRITY;
rq->cmd_flags |= REQ_INTEGRITY;
bio->bi_opf |= REQ_INTEGRITY;
bio->bi_opf &= ~REQ_INTEGRITY;
if (bio->bi_opf & REQ_INTEGRITY)
return rq->cmd_flags & REQ_INTEGRITY;