linux-kernel - Re: [PATCH] fs/ext4: Remove unnecessary zero-initialization via memset

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Message-ID: <8f7133f3-5303-4782-84da-e43fc57e86e3@huaweicloud.com>
Date: Tue, 16 Dec 2025 15:59:27 +0800
From: Zhang Yi <yi.zhang@...weicloud.com>
To: Donglin Peng <dolinux.peng@...il.com>
Cc: tytso@....edu, adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
 linux-kernel@...r.kernel.org, pengdonglin <pengdonglin@...omi.com>
Subject: Re: [PATCH] fs/ext4: Remove unnecessary zero-initialization via
 memset

On 12/11/2025 8:38 PM, Donglin Peng wrote:
> From: pengdonglin <pengdonglin@...omi.com>
> 
> The d_path function does not require the caller to pre-zero the
> buffer.
> 
> Signed-off-by: pengdonglin <pengdonglin@...omi.com>

This should just be a cleanup.

Reviewed-by: Zhang Yi <yi.zhang@...wei.com>

> ---
>  fs/ext4/file.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
> index 7a8b30932189..484cb7388802 100644
> --- a/fs/ext4/file.c
> +++ b/fs/ext4/file.c
> @@ -858,7 +858,6 @@ static int ext4_sample_last_mounted(struct super_block *sb,
>  	 * when trying to sort through large numbers of block
>  	 * devices or filesystem images.
>  	 */
> -	memset(buf, 0, sizeof(buf));
>  	path.mnt = mnt;
>  	path.dentry = mnt->mnt_root;
>  	cp = d_path(&path, buf, sizeof(buf));