linux-ext4 - Re: [PATCH RFC 4/8] btrfs: use super write guard in sb_start

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Message-ID: <cxrp3a7wu5lz5o6fiwleqiqwqm6xyevdjiega77mwxy5aekeab@522tt37vnwip>
Date: Tue, 4 Nov 2025 18:00:29 +0100
From: Mateusz Guzik <mjguzik@...il.com>
To: Christian Brauner <brauner@...nel.org>
Cc: linux-fsdevel@...r.kernel.org, 
	Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>, linux-btrfs@...r.kernel.org, 
	linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org
Subject: Re: [PATCH RFC 4/8] btrfs: use super write guard in sb_start_write()

On Tue, Nov 04, 2025 at 01:12:33PM +0100, Christian Brauner wrote:
> Signed-off-by: Christian Brauner <brauner@...nel.org>
> ---
>  fs/btrfs/volumes.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 2bec544d8ba3..4152b0a5537a 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -4660,7 +4660,8 @@ static int balance_kthread(void *data)
>  	struct btrfs_fs_info *fs_info = data;
>  	int ret = 0;
>  
> -	sb_start_write(fs_info->sb);
> +	guard(super_write)(fs_info->sb);
> +
>  	mutex_lock(&fs_info->balance_mutex);
>  	if (fs_info->balance_ctl)
>  		ret = btrfs_balance(fs_info, fs_info->balance_ctl, NULL);
> 

this missed sb_end_write call removal