bio_first_bvec_all
phys_addr_t bvec_paddr = bvec_phys(bio_first_bvec_all(bio));
int sector_nr = calc_sector_number(stripe, bio_first_bvec_all(&bbio->bio));
int sector_nr = calc_sector_number(stripe, bio_first_bvec_all(&bbio->bio));
int sector_nr = calc_sector_number(stripe, bio_first_bvec_all(&bbio->bio));
for (i = 0, bvl = bio_first_bvec_all(bio); \
return bio_first_bvec_all(bio)->bv_page;
struct bio_vec *bvec = bio_first_bvec_all(bio) + i;