linux-ext4 - Re: [PATCH] ext4: Simplify !page_bufs logic with simple BUG

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Date:   Wed, 5 Jan 2022 09:45:09 +0100
From:   Lukas Czerner <lczerner@...hat.com>
To:     Ritesh Harjani <riteshh@...ux.ibm.com>
Cc:     linux-ext4@...r.kernel.org, xu.xin16@....com.cn
Subject: Re: [PATCH] ext4: Simplify !page_bufs logic with simple BUG_ON()

On Wed, Jan 05, 2022 at 02:06:56PM +0530, Ritesh Harjani wrote:
> Simplify !page_bufs logic with simple BUG_ON().

Looks good, thanks!

Reviewed-by: Lukas Czerner <lczerner@...hat.com>

> 
> Signed-off-by: Ritesh Harjani <riteshh@...ux.ibm.com>
> ---
> Noticed a bug_on() related patch while reviewing, hence felt, this
> below trivial change could be included along with it.
> 
>  fs/ext4/inode.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index bfd3545f1e5d..5656b4a9007b 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -1879,10 +1879,7 @@ static int __ext4_journalled_writepage(struct page *page,
>  			goto out;
>  	} else {
>  		page_bufs = page_buffers(page);
> -		if (!page_bufs) {
> -			BUG();
> -			goto out;
> -		}
> +		BUG_ON(!page_bufs);
>  		ext4_walk_page_buffers(handle, inode, page_bufs, 0, len,
>  				       NULL, bget_one);
>  	}
> --
> 2.31.1
>