linux-kernel - Re: [PATCH] sh: make !MMU iounmap an inline function

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Message-ID: <d9ef4940-9aca-1932-c04d-e554cecfbe31@physik.fu-berlin.de>
Date:   Tue, 19 Apr 2022 14:21:39 +0200
From:   John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Rich Felker <dalias@...c.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc:     Vincent Whitchurch <vincent.whitchurch@...s.com>, kernel@...s.com,
        Christoph Hellwig <hch@....de>,
        kernel test robot <lkp@...el.com>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rob Landley <rob@...dley.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] sh: make !MMU iounmap an inline function

Hi Geert!

On 4/19/22 11:42, Geert Uytterhoeven wrote:
> Hi Rich, Sato-san,
> 
> On Sat, Apr 16, 2022 at 12:01 AM Rob Landley <rob@...dley.net> wrote:
>> On 4/14/22 03:12, Vincent Whitchurch wrote:
>>> The current definition of sh's !MMU iounmap makes it unusable in certain
>>> kinds of code, such as this instance caught by 0day on a patch posted to
>>> the mailing lists:
>>>
>>>  In file included from include/linux/io.h:13,
>>>                   from drivers/mtd/devices/phram.c:21:
>>>  drivers/mtd/devices/phram.c: In function 'register_device':
>>>  arch/sh/include/asm/io.h:274:33: error: expected expression before 'do'
>>>    274 | #define iounmap(addr)           do { } while (0)
>>>        |                                 ^~
>>>  drivers/mtd/devices/phram.c:150:44: note: in expansion of macro 'iounmap'
>>>    150 |         cached ? memunmap(new->mtd.priv) : iounmap(new->mtd.priv);
>>>        |                                            ^~~~~~~
>>>
>>> Make it an inline function as it was earlier.
>>>
>>> Link: https://lore.kernel.org/lkml/202204131446.omJ5mC54-lkp@intel.com/
>>> Fixes: 13f1fc870dd747131 ("sh: move the ioremap implementation out of line")
>>> Reported-by: kernel test robot <lkp@...el.com>
>>> Signed-off-by: Vincent Whitchurch <vincent.whitchurch@...s.com>
>>
>> Tested-by: Rob Landley <rob@...dley.net>
>>
>> Worked For Me.
> 
> Can we please get any of [1], [2], [3], or [4] applied and sent
> upstream, so people can stop wasting time on recreating and
> resubmitting similar patches all the time?

I agree. Those patches shouldn't be sent in vain. I very much appreciate everyone
sending in patches to improve Linux support for SH which is why I find it saddening
that the maintainers don't find enough time to review the patches.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@...ian.org
`. `'   Freie Universitaet Berlin - glaubitz@...sik.fu-berlin.de
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