linux-kernel - Re: [PATCH 2/3] jbd2: remove unused transaction->t_private

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Message-ID: <20241218113634.7t3m6ctguwfmwrwg@quack3>
Date: Wed, 18 Dec 2024 12:36:34 +0100
From: Jan Kara <jack@...e.cz>
To: Kemeng Shi <shikemeng@...weicloud.com>
Cc: tytso@....edu, adilger.kernel@...ger.ca, jack@...e.com,
	dennis.lamerice@...il.com, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 2/3] jbd2: remove unused transaction->t_private_list

On Tue 17-12-24 20:03:55, Kemeng Shi wrote:
> After we remove ext4 journal callback, transaction->t_private_list is
> not used anymore. Just remove unused transaction->t_private_list.
> 
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>

After the doc fixup feel free to add:

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

								Honza

> ---
>  Documentation/filesystems/journalling.rst | 2 --
>  fs/jbd2/transaction.c                     | 1 -
>  include/linux/jbd2.h                      | 6 ------
>  3 files changed, 9 deletions(-)
> 
> diff --git a/Documentation/filesystems/journalling.rst b/Documentation/filesystems/journalling.rst
> index 0254f7d57429..74f6aa2e1009 100644
> --- a/Documentation/filesystems/journalling.rst
> +++ b/Documentation/filesystems/journalling.rst
> @@ -112,8 +112,6 @@ so that you can do some of your own management. You ask the journalling
>  layer for calling the callback by simply setting
>  ``journal->j_commit_callback`` function pointer and that function is
>  called after each transaction commit. You can also use
> -``transaction->t_private_list`` for attaching entries to a transaction
> -that need processing when the transaction commits.
>  
>  JBD2 also provides a way to block all transaction updates via
>  jbd2_journal_lock_updates() /
> diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
> index 66513c18ca29..9fe17e290c21 100644
> --- a/fs/jbd2/transaction.c
> +++ b/fs/jbd2/transaction.c
> @@ -92,7 +92,6 @@ static void jbd2_get_transaction(journal_t *journal,
>  	atomic_set(&transaction->t_outstanding_revokes, 0);
>  	atomic_set(&transaction->t_handle_count, 0);
>  	INIT_LIST_HEAD(&transaction->t_inode_list);
> -	INIT_LIST_HEAD(&transaction->t_private_list);
>  
>  	/* Set up the commit timer for the new transaction. */
>  	journal->j_commit_timer.expires = round_jiffies_up(transaction->t_expires);
> diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
> index 50f7ea8714bf..90c802e48e23 100644
> --- a/include/linux/jbd2.h
> +++ b/include/linux/jbd2.h
> @@ -700,12 +700,6 @@ struct transaction_s
>  
>  	/* Disk flush needs to be sent to fs partition [no locking] */
>  	int			t_need_data_flush;
> -
> -	/*
> -	 * For use by the filesystem to store fs-specific data
> -	 * structures associated with the transaction
> -	 */
> -	struct list_head	t_private_list;
>  };
>  
>  struct transaction_run_stats_s {
> -- 
> 2.30.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR