dm_pdev_correct_dump_offset
dump_helper.offset = dm_pdev_correct_dump_offset(priv->pdev,
off_t dm_pdev_correct_dump_offset(dm_pdev_t *, off_t);
offset = dm_pdev_correct_dump_offset(tlc->pdev, offset);
off2 = dm_pdev_correct_dump_offset(tsc->stripe_devs[devnr].pdev,