linux-kernel - Re: [PATCH 1/3] fbdev/g364fb: Fix build failure

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Message-ID: <08447d52-0007-6f68-3848-209295a61d13@amsat.org>
Date:   Wed, 5 Feb 2020 19:19:08 +0100
From:   Philippe Mathieu-Daudé <f4bug@...at.org>
To:     Finn Thain <fthain@...egraphics.com.au>
Cc:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        James Hogan <jhogan@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "open list:BROADCOM NVRAM DRIVER" <linux-mips@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        Laurent Vivier <laurent@...ier.eu>,
        Thomas Bogendoerfer <tbogendoerfer@...e.de>
Subject: Re: [PATCH 1/3] fbdev/g364fb: Fix build failure

On 2/5/20 7:02 PM, Philippe Mathieu-Daudé wrote:
> On Sun, Feb 2, 2020 at 3:41 AM Finn Thain <fthain@...egraphics.com.au> wrote:
>>
>> This patch resolves these compiler errors and warnings --
>>
>>   CC      drivers/video/fbdev/g364fb.o
>> drivers/video/fbdev/g364fb.c: In function 'g364fb_cursor':
>> drivers/video/fbdev/g364fb.c:137:9: error: 'x' undeclared (first use in this function)
>> drivers/video/fbdev/g364fb.c:137:9: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/video/fbdev/g364fb.c:137:7: error: implicit declaration of function 'fontwidth' [-Werror=implicit-function-declaration]
>> drivers/video/fbdev/g364fb.c:137:23: error: 'p' undeclared (first use in this function)
>> drivers/video/fbdev/g364fb.c:137:38: error: 'y' undeclared (first use in this function)
>> drivers/video/fbdev/g364fb.c:137:7: error: implicit declaration of function 'fontheight' [-Werror=implicit-function-declaration]
>> drivers/video/fbdev/g364fb.c: In function 'g364fb_init':
>> drivers/video/fbdev/g364fb.c:233:24: error: 'fbvar' undeclared (first use in this function)
>> drivers/video/fbdev/g364fb.c:234:24: error: 'xres' undeclared (first use in this function)
> 
> 18 years unnoticed...
> 
>> drivers/video/fbdev/g364fb.c:201:14: warning: unused variable 'j' [-Wunused-variable]
>> drivers/video/fbdev/g364fb.c:197:25: warning: unused variable 'pal_ptr' [-Wunused-variable]
>>
>> The MIPS Magnum framebuffer console now works when tested in QEMU.
>>
>> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
>> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> 
> This commit is the kernel 'git origin' import, not the proper reference.
> 
> The actual change is between v2.5.17/2.5.19:
> https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/diff/drivers/video/g364fb.c?id=b30e6e183a728923267
> Date: 2002-05-22 07:52:33...
> 
> The same commit introduced the changes in g364fb_cursor(), which was
> implemented previous to v2.4.0 so it is hard to follow from there.
> 
> Nobody complains during 18 years so I doubt anyone care that
> g364fb_cursor() is removed.
> And by removing it, you improve the kernel quality, so:
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@...at.org>
> (Maybe remove the unhelpful 'Fixes' tag).
> 
>> Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
>> ---
>>  drivers/video/fbdev/g364fb.c | 29 +++--------------------------
>>  1 file changed, 3 insertions(+), 26 deletions(-)

Note, you need to rebase your series due to:

  commit 8a48ac339398f21282985bff16552447d41dcfb2
  Author: Jani Nikula <jani.nikula@...el.com>
  Date:   Tue Dec 3 18:38:50 2019 +0200

      video: constify fb ops across all drivers