linux-kernel - Re: [PATCH] arch/microblaze/kernel/setup.c: Add default 'screen

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Date:	Mon, 15 Sep 2014 19:10:57 +0800
From:	Chen Gang <gang.chen.5i5j@...il.com>
To:	Jesper Nilsson <jesper.nilsson@...s.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
CC:	Michal Simek <monstr@...str.eu>,
	Rob Herring <rob.herring@...xeda.com>,
	Paul Bolle <pebolle@...cali.nl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Mikael Starvik <starvik@...s.com>,
	Jesper Nilsson <jespern@...s.com>
Subject: Re: [PATCH] arch/microblaze/kernel/setup.c: Add default 'screen_info"
 for fixing compiling break

On 9/15/14 16:50, Jesper Nilsson wrote:
> On Sun, Sep 14, 2014 at 10:45:23AM +0200, Geert Uytterhoeven wrote:
>> Hi Chen,
>>
>> On Sun, Sep 14, 2014 at 10:32 AM, Chen Gang <gang.chen.5i5j@...il.com> wrote:
>>> Add default one just like other architectures have done (e.g. cris,
>>> score, sh ...), the related error with allmodconfig:
>>>
>>>     LD      init/built-in.o
>>>   drivers/built-in.o: In function `vgacon_save_screen':
>>>   drivers/video/console/.tmp_vgacon.o:(.text+0x834d0): undefined reference to `screen_info'
>>>   drivers/video/console/.tmp_vgacon.o:(.text+0x834ec): undefined reference to `screen_info'
>>>   drivers/built-in.o: In function `vgacon_resize':
>>>   drivers/video/console/.tmp_vgacon.o:(.text+0x83cdc): undefined reference to `screen_info'
>>>   drivers/video/console/.tmp_vgacon.o:(.text+0x83d38): undefined reference to `screen_info'
>>>   drivers/built-in.o: In function `vgacon_switch':
>>>   drivers/video/console/.tmp_vgacon.o:(.text+0x83f50): undefined reference to `screen_info'
>>>   drivers/built-in.o:drivers/video/console/.tmp_vgacon.o:(.text+0x8407c): more undefined references to `screen_info' follow
>>>   make: *** [vmlinux] Error 1
>>
>> Can microblaze actually have VGA?
>>
>> If not, it's better to disable it.
>>
>> BTW, it's interesting you mention cris, as VGA_CONSOLE depends on !CRIS
>> in drivers/video/console/Kconfig...
> 
> No CRIS platform has ever had a video console.
> 
>> I (still) think it's time to introduce ARCH_MIGHT_HAVE_VGA, and make
>> VGA_CONSOLE depend on that, cfr.
> 
> Sounds reasonable, at least it can avoid the specific depends on !*arch* cruft.
> 

Thank you very much, next when I try the ARCH_MIGHT_HAVE_VGA, I shall
process it (remove useless "screen_info").


Thanks.
-- 
Chen Gang

Open, share, and attitude like air, water, and life which God blessed
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