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

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Date:   Mon, 19 Aug 2019 13:27:52 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Greg Ungerer <gregungerer00@...il.com>
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

On Mon, Aug 5, 2019 at 2:18 PM Greg Ungerer <gregungerer00@...il.com> wrote:
> 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

Thanks, applied and queued for v5.4.


Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds