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

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Date:   Fri, 15 Apr 2022 14:21:30 -0500
From:   Rob Landley <rob@...dley.net>
To:     Vincent Whitchurch <vincent.whitchurch@...s.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>
Cc:     kernel@...s.com, hch@....de, kernel test robot <lkp@...el.com>,
        linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sh: make !MMU iounmap an inline function

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.

Rob