linux-kernel - Re: [PATCH] pinctrl: ish-pfc: avoid unused variable warning

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Date:	Wed, 27 Apr 2016 15:23:39 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Arnd Bergmann <arnd@...db.de>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Linus Walleij <linus.walleij@...aro.org>
CC:	Simon Horman <horms+renesas@...ge.net.au>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Ulrich Hecht <ulrich.hecht+renesas@...il.com>,
	Hisashi Nakamura <hisashi.nakamura.ak@...esas.com>,
	Takeshi Kihara <takeshi.kihara.df@...esas.com>,
	<linux-renesas-soc@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: ish-pfc: avoid unused variable warning


On Wednesday 27 April 2016 03:26 PM, Arnd Bergmann wrote:
> After the conversion to devm_pinctrl_register, we get a warning in
> sh_pfc_remove when CONFIG_PINCTRL_SH_PFC_GPIO is disabled:
>
> drivers/pinctrl/sh-pfc/core.c: In function 'sh_pfc_remove':
> drivers/pinctrl/sh-pfc/core.c:603:17: unused variable 'pfc' [-Werror=unused-variable]
>    struct sh_pfc *pfc = platform_get_drvdata(pdev);
>
> This moves the variable definition inside of the same ifdef
> that has the only user, to get a clean build again.
>


Similar patch from Geert also:
[PATCH] pinctrl: sh-pfc: Kill unused variable in sh_pfc_remove()

If devm_gpiochip_add_data() used then this may not be required.