HFS_PMAP_BLK
bh = sb_bread512(sb, *part_start + HFS_PMAP_BLK + ++i, pm);
bh = sb_bread512(sb, *part_start + HFS_PMAP_BLK, data);
*part_start + HFS_PMAP_BLK + i,
res = hfsplus_submit_bio(sb, *part_start + HFS_PMAP_BLK,