linux-kernel - Re: [PATCH] m68k: Prevent some compiler warnings in coldfire builds

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Message-ID: <e73a9616-23c3-f04d-1519-185483adcb98@linux-m68k.org>
Date:   Mon, 5 Aug 2019 22:18:30 +1000
From:   Greg Ungerer <gregungerer00@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Finn Thain <fthain@...egraphics.com.au>,
        Michael Schmitz <schmitzmic@...il.com>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] m68k: Prevent some compiler warnings in coldfire builds

Hi Geert,

On 5/8/19 5:14 pm, Geert Uytterhoeven wrote:
> On Sat, Aug 3, 2019 at 1:36 AM Greg Ungerer <gregungerer00@...il.com> wrote:
>> On 2/8/19 10:10 am, Finn Thain wrote:
>>> Since commit d3b41b6bb49e ("m68k: Dispatch nvram_ops calls to Atari or
>>> Mac functions"), Coldfire builds generate compiler warnings due to the
>>> unconditional inclusion of asm/atarihw.h and asm/macintosh.h.
>>>
>>> The inclusion of asm/atarihw.h causes warnings like this:
>>>
>>> In file included from ./arch/m68k/include/asm/atarihw.h:25:0,
>>>                    from arch/m68k/kernel/setup_mm.c:41,
>>>                    from arch/m68k/kernel/setup.c:3:
>>> ./arch/m68k/include/asm/raw_io.h:39:0: warning: "__raw_readb" redefined
>>>    #define __raw_readb in_8
>>>
>>> In file included from ./arch/m68k/include/asm/io.h:6:0,
>>>                    from arch/m68k/kernel/setup_mm.c:36,
>>>                    from arch/m68k/kernel/setup.c:3:
>>> ./arch/m68k/include/asm/io_no.h:16:0: note: this is the location of the previous definition
>>>    #define __raw_readb(addr) \
>>> ...
>>>
>>> This issue is resolved by dropping the asm/raw_io.h include. It turns out
>>> that asm/io_mm.h already includes that header file.
>>>
>>> Moving the relevant macro definitions helps to clarify this dependency
>>> and make it safe to include asm/atarihw.h.
>>>
>>> The other warnings look like this:
>>>
>>> In file included from arch/m68k/kernel/setup_mm.c:48:0,
>>>                    from arch/m68k/kernel/setup.c:3:
>>> ./arch/m68k/include/asm/macintosh.h:19:35: warning: 'struct irq_data' declared inside parameter list will not be visible outside of this definition or declaration
>>>    extern void mac_irq_enable(struct irq_data *data);
>>>                                      ^~~~~~~~
>>> ...
>>>
>>> This issue is resolved by adding the missing linux/irq.h include.
>>>
>>> Cc: Michael Schmitz <schmitzmic@...il.com>
>>> Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
> 
>>
>> Looks good to me:
>>
>> Acked-by: Greg Ungerer <gerg@...ux-m68k.org>
>>
>> Geert: I can take this via the m68knommu tree if you like?
>> Or if you want to pick it up then no problem.
> 
> If you have fixes for m68knommu for v5.3, feel free to queue it.
> Else I can queue it for v5.4.
> 
> Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>

I don't currently have any fixes for 5.3 queued.
And there is no real hurry on this anyway, it can wait for 5.4.
So please add to your queue for 5.4

Regards
Greg