bfq_merge_bfqqs
bfqq = bfq_merge_bfqqs(bfqd, bfqd->bio_bic, bfqq);
return bfq_merge_bfqqs(bfqd, bic, bfqq);
bfqq = bfq_merge_bfqqs(bfqd, RQ_BIC(rq), bfqq);