bm_rw
return bm_rw(device, BM_AIO_READ, 0);
return bm_rw(device, 0, 0);
return bm_rw(device, BM_AIO_WRITE_ALL_PAGES, 0);
return bm_rw(device, BM_AIO_COPY_PAGES, upper_idx);
return bm_rw(device, BM_AIO_COPY_PAGES, 0);
return bm_rw(device, BM_AIO_WRITE_HINTED | BM_AIO_COPY_PAGES, 0);