linux-kernel - Re: [SPAM?]Re: arch/m68k/68000/dragen2.c:73:16: error: 'screen

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Date:   Wed, 17 Feb 2021 12:42:41 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Greg Ungerer <gerg@...ux-m68k.org>
Cc:     Arnd Bergmann <arnd@...nel.org>, kernel test robot <lkp@...el.com>,
        Arnd Bergmann <arnd@...db.de>, kbuild-all@...ts.01.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [SPAM?]Re: arch/m68k/68000/dragen2.c:73:16: error: 'screen_bits' undeclared

Hi Greg,

On Wed, Feb 17, 2021 at 5:59 AM Greg Ungerer <gerg@...ux-m68k.org> wrote:
> On 12/2/21 8:05 pm, Arnd Bergmann wrote:
> > On Fri, Feb 12, 2021 at 6:48 AM kernel test robot <lkp@...el.com> wrote:
> >> FYI, the error/warning still remains.
> >
> >>           |             ^~~~~~~~~~~~
> >>     arch/m68k/68000/dragen2.c: In function 'init_dragen2':
> >>>> arch/m68k/68000/dragen2.c:73:16: error: 'screen_bits' undeclared (first use in this function)
> >>        73 |  LSSA = (long) screen_bits;
> >>           |                ^~~~~~~~~~~
> >>     arch/m68k/68000/dragen2.c:73:16: note: each undeclared identifier is reported only once for each function it appears in
> >
> > This problem existed before my patch, I just moved the line to another file.
> > To fix it, one needs to test on real hardware and figure out what is supposed
> > to go in there.
> >
> > The bug was apparently introduced in linux-2.5.70 in this commit:
>  >
> > commit 2b1a7e97c8c2d6330a432cbcaf83a0ef5fab848e
> > Author: gerg <gerg>
> > Date:   Mon May 26 16:45:57 2003 +0000
> >
> >      [PATCH] fix m68knommu DragonEngine2 target setup code
> >
> >      Numerous fixes for the m68knommu DragonEngine2 setup code.
> >
> >      It was out of date relative to more recent kernels.  Original patches
> >      from Georges Menie.
> >
> >      BKrev: 3ed244c5dPVeFKP63b4kkeS_rEshag
>
> Digging around a bit I think the screen_bits data structure was
> originally in a screen.h file that was generated from a screen.xbm file.
> That was removed in commit 0c0e6db80683 ("m68k: drop unused parts of
> 68VZ328 Makefile").
>
> Obviously no one seems to be using this, that has been broken for a long
> time now.
>
> I could restore the generated screen.h here, so this could compile at
> least. I don't have any of the hardware supported in the arch/m68k/68000
> directory, so I can't test anything we fix in there.

Do you have the generated screen.h?
Looks like both the tool (xbm2lcd.pl) and the source (screen.xbm)
never made it upstream?

> The other option is to remove the dragen code altogether.

Just remove the part protected by checks for CONFIG_INIT_LCD?

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