linux-kernel - Re: [PATCH 1/2] watchdog: tegra: constify watchdog

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Date:   Tue, 6 Sep 2016 11:13:11 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Julia Lawall <Julia.Lawall@...6.fr>
Cc:     Wim Van Sebroeck <wim@...ana.be>, kernel-janitors@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>,
        Stephen Warren <swarren@...dotorg.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-watchdog@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] watchdog: tegra: constify watchdog_ops structures

On Thu, Sep 01, 2016 at 07:35:25PM +0200, Julia Lawall wrote:
> Check for watchdog_ops structures that are only stored in the ops field of
> a watchdog_device structure.  This field is declared const, so watchdog_ops
> structures that have this property can be declared as const also.
> 
> The semantic patch that makes this change is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @r disable optional_qualifier@
> identifier i;
> position p;
> @@
> static struct watchdog_ops i@p = { ... };
> 
> @ok@
> identifier r.i;
> struct watchdog_device e;
> position p;
> @@
> e.ops = &i@p;
> 
> @bad@
> position p != {r.p,ok.p};
> identifier r.i;
> struct watchdog_ops e;
> @@
> e@i@p
> 
> @depends on !bad disable optional_qualifier@
> identifier r.i;
> @@
> static
> +const
>  struct watchdog_ops i = { ... };
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  drivers/watchdog/tegra_wdt.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Thierry Reding <treding@...dia.com>

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