AFFS_BLOCK
map_bh(bh_result, sb, (sector_t)be32_to_cpu(AFFS_BLOCK(sb, ext_bh, block)));
AFFS_BLOCK(sb, ext_bh, block) = cpu_to_be32(blocknr);
affs_free_block(sb, be32_to_cpu(AFFS_BLOCK(sb, ext_bh, i)));
AFFS_BLOCK(sb, ext_bh, i) = 0;
affs_free_block(sb, be32_to_cpu(AFFS_BLOCK(sb, ext_bh, i)));