# insmod ext3
dmesg output after insmod ext3:
ext3: Unknown symbol journal_force_commit
ext3: Unknown symbol __ashldi3
ext3: Unknown symbol journal_dirty_data
ext3: Unknown symbol journal_force_commit_nested
ext3: Unknown symbol journal_init_dev
ext3: Unknown symbol journal_dirty_metadata
ext3: Unknown symbol journal_forget
ext3: Unknown symbol journal_wipe
ext3: Unknown symbol journal_blocks_per_page
ext3: Unknown symbol journal_errno
ext3: Unknown symbol journal_extend
ext3: Unknown symbol journal_invalidatepage
ext3: Unknown symbol journal_create
ext3: Unknown symbol journal_unlock_updates
ext3: Unknown symbol journal_revoke
ext3: Unknown symbol journal_lock_updates
ext3: Unknown symbol journal_start_commit
ext3: Unknown symbol __ashrdi3
ext3: Unknown symbol journal_flush
ext3: Unknown symbol journal_load
ext3: Unknown symbol journal_try_to_free_buffers
ext3: Unknown symbol journal_update_format
ext3: Unknown symbol journal_get_write_access
ext3: Unknown symbol journal_get_undo_access
ext3: Unknown symbol journal_get_create_access
ext3: Unknown symbol journal_destroy
ext3: Unknown symbol journal_clear_err
ext3: Unknown symbol journal_stop
ext3: Unknown symbol journal_init_inode
ext3: Unknown symbol journal_start
ext3: Unknown symbol log_wait_commit
ext3: Unknown symbol journal_release_buffer
ext3: Unknown symbol journal_check_available_features
ext3: Unknown symbol journal_abort
ext3: Unknown symbol journal_restart