linux-kernel - Re: [PATCH] fs: ext4: Fix traditional comparison using max/min method

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Message-ID: <c4d1822c-1c4d-376a-1a35-80ddb990a9a4@huaweicloud.com>
Date:   Tue, 20 Jun 2023 10:22:32 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     Li Dong <lidong@...o.com>, Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        "open list:EXT4 FILE SYSTEM" <linux-ext4@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Cc:     opensource.kernel@...o.com
Subject: Re: [PATCH] fs: ext4: Fix traditional comparison using max/min method



on 6/19/2023 9:44 PM, Li Dong wrote:
> It would be better to replace the traditional ternary conditional operator with max()/min()
Hi Li, thanks for the patch, but this is a duplicate of [1] :)

[1] https://lore.kernel.org/linux-ext4/51be7b9a-726c-c232-146b-7785c50e875a@huaweicloud.com/
> Signed-off-by: Li Dong <lidong@...o.com>
> ---
>  fs/ext4/balloc.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
> index 1f72f977c6db..90ff655ddddb 100644
> --- a/fs/ext4/balloc.c
> +++ b/fs/ext4/balloc.c
> @@ -111,10 +111,8 @@ static unsigned ext4_num_overhead_clusters(struct super_block *sb,
>  	itbl_blk_start = ext4_inode_table(sb, gdp);
>  	itbl_blk_end = itbl_blk_start + sbi->s_itb_per_group - 1;
>  	if (itbl_blk_start <= end && itbl_blk_end >= start) {
> -		itbl_blk_start = itbl_blk_start >= start ?
> -			itbl_blk_start : start;
> -		itbl_blk_end = itbl_blk_end <= end ?
> -			itbl_blk_end : end;
> +		itbl_blk_start = max(itbl_blk_start, start);
> +		itbl_blk_end = min(itbl_blk_end, end);
>  
>  		itbl_cluster_start = EXT4_B2C(sbi, itbl_blk_start - start);
>  		itbl_cluster_end = EXT4_B2C(sbi, itbl_blk_end - start);
> 

-- 
Best wishes
Kemeng Shi