iopt_area_start_byte
if (iopt_area_start_byte(iter->area, iter->cur_iova) % PAGE_SIZE)
(iopt_area_start_byte(iter->area, iopt_area_last_iova(iter->area)) %
area->pages, iopt_area_start_byte(area, iter.cur_iova),
iopt_area_start_byte(area, new_start) & (alignment - 1))
iopt_area_start_byte(area, start_iova),
iopt_area_start_byte(area, new_start),
elm->start_byte = iopt_area_start_byte(area, iter.cur_iova);
return iopt_area_start_byte(area, iova) / PAGE_SIZE;