linux-kernel - Re: [PATCH 18/22] watchdog: mt7621_wdt: Use 'dev' instead of dereferencing it repeatedly

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Date:   Wed, 10 Apr 2019 11:46:24 -0700
From:   Joe Perches <joe@...ches.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>
Cc:     linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matthias Brugger <matthias.bgg@...il.com>
Subject: Re: [PATCH 18/22] watchdog: mt7621_wdt: Use 'dev' instead of
 dereferencing it repeatedly

On Wed, 2019-04-10 at 09:27 -0700, Guenter Roeck wrote:
> Introduce local variable 'struct device *dev' and use it instead of
> dereferencing it repeatedly.
> 
> The conversion was done automatically with coccinelle using the
> following semantic patches. The semantic patches and the scripts
> used to generate this commit log are available at
> https://github.com/groeck/coccinelle-patches

Interesting collection.  It would be useful to specify which
particular script generated or enabled this patch.

Just scanning briefly, it might have been this one:
https://github.com/groeck/coccinelle-patches/blob/master/common/deref.cocci
But it looks like some manual bit might have been required too.

And trivially:

> diff --git a/drivers/watchdog/mt7621_wdt.c b/drivers/watchdog/mt7621_wdt.c
[]
> @@ -133,18 +133,19 @@ static struct watchdog_device mt7621_wdt_dev = {
[]
>  	watchdog_init_timeout(&mt7621_wdt_dev, mt7621_wdt_dev.max_timeout,
> -			      &pdev->dev);
> +			      dev);

This could be on one line.