linux-kernel - Re: [PATCH 12/31] nds32: Device specific operations

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Message-ID: <CAEbi=3fCjkTSXLe+jP4UTe1W7570aN9LEpM9-v54p8xEW2YnAA@mail.gmail.com>
Date:   Sat, 11 Nov 2017 00:07:29 +0800
From:   Greentime Hu <green.hu@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
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 <vincentc@...estech.com>, deanbo422@...il.com
Subject: Re: [PATCH 12/31] nds32: Device specific operations

2017-11-09 15:04 GMT+08:00 Greentime Hu <green.hu@...il.com>:
> 2017-11-08 17:04 GMT+08:00 Arnd Bergmann <arnd@...db.de>:
>> On Wed, Nov 8, 2017 at 6:55 AM, Greentime Hu <green.hu@...il.com> wrote:
>>
>>> +
>>> +#define ioremap(cookie,size)           __ioremap(cookie,size,0,1)
>>> +#define ioremap_nocache(cookie,size)   __ioremap(cookie,size,0,1)
>>> +#define iounmap(cookie)                        __iounmap(cookie)
>>
>>> +#include <asm-generic/io.h>
>>
>> asm-generic/io.h now provides an ioremap_nocache() helper along with
>> ioremap_uc/ioremap_wc/ioremap_wt, so I think you can remove the
>> ioremap_nocache definition here. You might also be able to remove
>> __ioremap and __iounmap, and only provide ioremap/iounmap, plus
>> the identity macro 'define ioremap ioremap'
>
> Thanks. I will try to use generic ioremap_nocache() helper in the next
> version patch.

I think I can't remove ioremap_nocache definition because it is defined
in asm-generic/io.h with !CONFIG_MMU.