linux-ext4 - Re: [RFC PATCH v2 1/7] jbd2: remove the out label in __jbd2_journal_remove

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Message-ID: <20210421100153.GQ8706@quack2.suse.cz>
Date:   Wed, 21 Apr 2021 12:01:53 +0200
From:   Jan Kara <jack@...e.cz>
To:     Zhang Yi <yi.zhang@...wei.com>
Cc:     linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        tytso@....edu, adilger.kernel@...ger.ca, jack@...e.cz,
        yukuai3@...wei.com
Subject: Re: [RFC PATCH v2 1/7] jbd2: remove the out label in
 __jbd2_journal_remove_checkpoint()

On Wed 14-04-21 21:47:31, Zhang Yi wrote:
> 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@...wei.com>

Looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  fs/jbd2/checkpoint.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
> index 63b526d44886..bf5511d19ac5 100644
> --- a/fs/jbd2/checkpoint.c
> +++ b/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;
>  }
>  
>  /*
> -- 
> 2.25.4
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR