bvec_iter_bvec
struct bio_vec bvec = bvec_iter_bvec(bio->bi_io_vec, iter);
struct bio_vec biv = bvec_iter_bvec(bip->bip_vec, bip->bip_iter);
struct bio_vec bvec = bvec_iter_bvec((struct bio_vec *)dp->context_ptr,
bv = bvec_iter_bvec(bip->bip_vec, bip->bip_iter);
bvec_iter_bvec((bio)->bi_io_vec, (iter))
((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \
struct bio_vec bv = bvec_iter_bvec(i->bvec, bi);
struct bio_vec bv = bvec_iter_bvec(cursor->data->bvec_pos.bvecs,