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From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 18 Dec 2017 12:26:23 +0100
Message-ID: <CAK8P3a0xQ4mYnkxjWTTEcvpJg6SfcA4WZKNkopa93_6Mz_YOGw@mail.gmail.com>
Subject: Re: [PATCH v4 13/36] nds32: Device specific operations
To: Greentime Hu <green.hu@gmail.com>
Cc: Greentime <greentime@andestech.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-arch <linux-arch@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <marc.zyngier@arm.com>, Rob Herring <robh+dt@kernel.org>,
        Networking <netdev@vger.kernel.org>,
        Vincent Chen <deanbo422@gmail.com>, DTML <devicetree@vger.kernel.org>,
        Al Viro <viro@zeniv.linux.org.uk>, David Howells <dhowells@redhat.com>,
        Will Deacon <will.deacon@arm.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        linux-serial@vger.kernel.org,
        Geert Uytterhoeven <geert.uytterhoeven@gmail.com>,
        Linus Walleij <linus.walleij@linaro.org>,
        Mark Rutland <mark.rutland@arm.com>, Greg KH <greg@kroah.com>,
        ren_guo@c-sky.com, Philippe Ombredanne <pombredanne@nexb.com>,
        Vincent Chen <vincentc@andestech.com>
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On Mon, Dec 18, 2017 at 7:46 AM, Greentime Hu <green.hu@gmail.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