linux-kernel - Re: [PATCH v4 13/36] nds32: Device specific operations

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Message-ID: <CAK8P3a0xQ4mYnkxjWTTEcvpJg6SfcA4WZKNkopa93_6Mz_YOGw@mail.gmail.com>
Date:   Mon, 18 Dec 2017 12:26:23 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Greentime Hu <green.hu@...il.com>
Cc:     Greentime <greentime@...estech.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Networking <netdev@...r.kernel.org>,
        Vincent Chen <deanbo422@...il.com>,
        DTML <devicetree@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        David Howells <dhowells@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-serial@...r.kernel.org,
        Geert Uytterhoeven <geert.uytterhoeven@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Mark Rutland <mark.rutland@....com>, Greg KH <greg@...ah.com>,
        ren_guo@...ky.com, Philippe Ombredanne <pombredanne@...b.com>,
        Vincent Chen <vincentc@...estech.com>
Subject: Re: [PATCH v4 13/36] nds32: Device specific operations

On Mon, Dec 18, 2017 at 7:46 AM, Greentime Hu <green.hu@...il.com> wrote:

> +#define __ASM_NDS32_IO_H
> +
> +extern void iounmap(void __iomem *addr);

The prototype here should probably include 'volatile' to avoid warnings in an
allmodconfig build.

      Arnd