linux-kernel - Re: [PATCH] gpio: aspeed: fix compile testing warning

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Message-ID: <CACRpkdaMdcAnA9GWx2vJtfGtDEUzpE64g6v+tJM8NVtY=Bc_Mg@mail.gmail.com>
Date:   Fri, 13 Jul 2018 09:05:48 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Joel Stanley <joel@....id.au>, Andrew Jeffery <andrew@...id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Thierry Reding <treding@...dia.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-aspeed@...ts.ozlabs.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio: aspeed: fix compile testing warning

On Mon, Jul 9, 2018 at 4:56 PM Arnd Bergmann <arnd@...db.de> wrote:

> Gcc cannot always see that BUG_ON(1) is guaranteed to not
> return, so we get a warning message in some configurations:
>
> drivers/gpio/gpio-aspeed.c: In function 'bank_reg':
> drivers/gpio/gpio-aspeed.c:244:1: error: control reaches end of non-void function [-Werror=return-type]
>
> Using a plain BUG() is easier here and avoids the problem.
>
> Fixes: 44ddf559d579 ("gpio: aspeed: Rework register type accessors")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Patch applied with Benjamin's ACK.

Yours,
Linus Walleij