ntfs3_bitmap_size
new_wnd = bytes_to_block(sb, ntfs3_bitmap_size(new_bits));
wnd->nwnd = bytes_to_block(sb, ntfs3_bitmap_size(nbits));
new_bitmap_bytes = ntfs3_bitmap_size(new_mft_total);
err = ni_insert_resident(ni, ntfs3_bitmap_size(1), ATTR_BITMAP,
ntfs3_bitmap_size(bit + 1), NULL, true);
bpb = ntfs3_bitmap_size(bit);
if (inode->i_size < ntfs3_bitmap_size(tt)) {