bvec->bv_len, pos); kunmap(bvec->bv_page); cond_resched(); return bw; struct bio_vec bvec; struct req_iterator iter; int ret = 0;rq_for_each_segment(bvec, rq, iter) { ret = lo_write_bvec(lo->lo_backing_file, &bvec, &pos); ...