[PATCH] jbd: fix ordered-data writeout logic

There's some nasty code in commit which deals with a lock ranking problem. 
Currently if it fails to get the lock when and local variable `bufs' is zero
we forget to write out some ordered-data buffers.  So a subsequent
crash+recovery could yield stale data in existing files.

Fix it by correctly restarting the t_sync_datalist search.

fs/jbd/commit.c

@@ -262,8 +262,7 @@ void journal_commit_transaction(journal_t *journal)
 				if (!jbd_trylock_bh_state(bh)) {
 					spin_unlock(&journal->j_list_lock);
 					schedule();
-					spin_lock(&journal->j_list_lock);
-					break;
+					goto write_out_data;
 				}
 				__journal_unfile_buffer(jh);
 				jh->b_transaction = NULL;