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From: Greentime Hu <green.hu@gmail.com>
Date: Mon, 18 Dec 2017 19:44:49 +0800
Message-ID: <CAEbi=3cAoP85hc-0rMwPoJ8=BjfG=4HaD89rqbEdiA7saUx7yQ@mail.gmail.com>
Subject: Re: [PATCH v4 13/36] nds32: Device specific operations
To: Arnd Bergmann <arnd@arndb.de>
Cc: Greentime <greentime@andestech.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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2017-12-18 19:26 GMT+08:00 Arnd Bergmann <arnd@arndb.de>:
> 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.
>

Thanks. I will update it like this.
extern void iounmap(volatile void __iomem *addr);