linux-kernel - Re: [PATCH] kernfs: Simplify if--else codes

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Date:   Mon, 28 Jun 2021 08:47:41 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     13145886936@....com
Cc:     tj@...nel.org, linux-kernel@...r.kernel.org,
        gushengxian <gushengxian@...ong.com>
Subject: Re: [PATCH] kernfs: Simplify if--else codes

On Sun, Jun 27, 2021 at 11:01:55PM -0700, 13145886936@....com wrote:
> From: gushengxian <gushengxian@...ong.com>
> 
> Simplify if--else codes.
> 
> Signed-off-by: gushengxian <13145886936@....com>
> Signed-off-by: gushengxian <gushengxian@...ong.com>
> ---
>  fs/kernfs/file.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
> index c75719312147..6bd531419f30 100644
> --- a/fs/kernfs/file.c
> +++ b/fs/kernfs/file.c
> @@ -644,10 +644,7 @@ static int kernfs_fop_open(struct inode *inode, struct file *file)
>  	 * Both paths of the branch look the same.  They're supposed to
>  	 * look that way and give @of->mutex different static lockdep keys.
>  	 */
> -	if (has_mmap)
> -		mutex_init(&of->mutex);
> -	else
> -		mutex_init(&of->mutex);
> +	mutex_init(&of->mutex);

Please always read the code, and the comments, you are modifying before
you modify it :(

This is a sign you are doing "blind" code cleanups.  Please stick with
drivers/staging/ for now as that part of the kernel accepts them much
easier than the rest of the kernel does.

thanks,

greg k-h