linux-kernel - Re: [PATCH] pinctrl: bcm2835: constify gpio

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Date:   Wed, 12 Jul 2017 12:13:16 -0700
From:   Eric Anholt <eric@...olt.net>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Stefan Wahren <stefan.wahren@...e.com>
Cc:     bcm-kernel-feedback-list@...adcom.com, linux-gpio@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Subject: Re: [PATCH] pinctrl: bcm2835: constify gpio_chip structure

"Gustavo A. R. Silva" <garsilva@...eddedor.com> writes:

> This structure is only used to copy into other structure, so declare
> it as const.
>
> This issue was detected using Coccinelle and the following semantic patch:

Acked-by: Eric Anholt <eric@...olt.net>

> ---
>  drivers/pinctrl/bcm/pinctrl-bcm2835.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
> index 2308831..7203f35 100644
> --- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
> +++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
> @@ -353,7 +353,7 @@ static int bcm2835_gpio_direction_output(struct gpio_chip *chip,
>  	return pinctrl_gpio_direction_output(chip->base + offset);
>  }
>  
> -static struct gpio_chip bcm2835_gpio_chip = {
> +static const struct gpio_chip bcm2835_gpio_chip = {
>  	.label = MODULE_NAME,
>  	.owner = THIS_MODULE,
>  	.request = gpiochip_generic_request,
> -- 
> 2.5.0

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