linux-kernel - Re: [PATCH 4/6] ext4: remove unneeded check in get_dx

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Message-ID: <a002a2bd-f8ff-4bf2-bb4d-e686cfeea6ac@huaweicloud.com>
Date: Sat, 21 Dec 2024 15:44:31 +0800
From: Zhang Yi <yi.zhang@...weicloud.com>
To: Kemeng Shi <shikemeng@...weicloud.com>
Cc: linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, tytso@....edu,
 adilger.kernel@...ger.ca
Subject: Re: [PATCH 4/6] ext4: remove unneeded check in get_dx_countlimit

On 2024/12/19 19:00, Kemeng Shi wrote:
> The "offset" is always non-NULL, remove unneeded NULL check of "offset".
> 
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>

I agree with Ojaswin, the check strengthens the function, and I'd
suggest that we'd better to keep it for now.

Thanks,
Yi.

> ---
>  fs/ext4/namei.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
> index 33670cebdedc..07a1bb570deb 100644
> --- a/fs/ext4/namei.c
> +++ b/fs/ext4/namei.c
> @@ -434,8 +434,7 @@ static struct dx_countlimit *get_dx_countlimit(struct inode *inode,
>  	} else
>  		return NULL;
>  
> -	if (offset)
> -		*offset = count_offset;
> +	*offset = count_offset;
>  	return (struct dx_countlimit *)(((void *)dirent) + count_offset);
>  }
>