The current mm patches don't respect 'sync()'. In particular, reiser4_sync_inodes in fs/reiser4/super_ops.c skips it, due to NULL being handed over. The skip was introduced by http://userweb.kernel.org/~akpm/mmotm/broken-out/reiser4-fixed-null-pointer-dereference.patch to mitigate a NULL dereference introduced by http://userweb.kernel.org/~akpm/mmotm/broken-out/reiser4-vfs-add-super_operationssync_inodes-2.patch