Adding the dax maintainers and they really need to review this. > + long want = (drbd_md_last_sector(bdev) + 1 - first_sector) >> > (PAGE_SHIFT - SECTOR_SHIFT); > + pgoff_t pgoff = first_sector >> (PAGE_SHIFT - SECTOR_SHIFT); > + long md_offset_byte = (bdev->md.md_offset - first_sector) << > SECTOR_SHIFT; > + long al_offset_byte = (al_sector - first_sector) << SECTOR_SHIFT;
You really want helpers to make all these unit conversions maintainable.
