jbd2: remove the out label in __jbd2_journal_remove_checkpoint()

The 'out' lable just return the 'ret' value and seems not required, so
remove this label and switch to return appropriate value immediately.
This patch also do some minor cleanup, no logical change.
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210610112440.3438139-2-yi.zhang@huawei.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/jbd2/checkpoint.c

@@ -564,13 +564,13 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
 	struct transaction_chp_stats_s *stats;
 	transaction_t *transaction;
 	journal_t *journal;
-	int ret = 0;
 
 	JBUFFER_TRACE(jh, "entry");
 
-	if ((transaction = jh->b_cp_transaction) == NULL) {
+	transaction = jh->b_cp_transaction;
+	if (!transaction) {
 		JBUFFER_TRACE(jh, "not on transaction");
-		goto out;
+		return 0;
 	}
 	journal = transaction->t_journal;
 
@@ -579,9 +579,9 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
 	jh->b_cp_transaction = NULL;
 	jbd2_journal_put_journal_head(jh);
 
-	if (transaction->t_checkpoint_list != NULL ||
-	    transaction->t_checkpoint_io_list != NULL)
-		goto out;
+	/* Is this transaction empty? */
+	if (transaction->t_checkpoint_list || transaction->t_checkpoint_io_list)
+		return 0;
 
 	/*
 	 * There is one special case to worry about: if we have just pulled the
@@ -593,10 +593,12 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
 	 * See the comment at the end of jbd2_journal_commit_transaction().
 	 */
 	if (transaction->t_state != T_FINISHED)
-		goto out;
+		return 0;
 
-	/* OK, that was the last buffer for the transaction: we can now
-	   safely remove this transaction from the log */
+	/*
+	 * OK, that was the last buffer for the transaction, we can now
+	 * safely remove this transaction from the log.
+	 */
 	stats = &transaction->t_chp_stats;
 	if (stats->cs_chp_time)
 		stats->cs_chp_time = jbd2_time_diff(stats->cs_chp_time,
@@ -606,9 +608,7 @@ int __jbd2_journal_remove_checkpoint(struct journal_head *jh)
 
 	__jbd2_journal_drop_transaction(journal, transaction);
 	jbd2_journal_free_transaction(transaction);
-	ret = 1;
-out:
-	return ret;
+	return 1;
 }
 
 /*