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

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Message-ID: <54181810.1060105@monstr.eu>
Date:	Tue, 16 Sep 2014 12:59:28 +0200
From:	Michal Simek <monstr@...str.eu>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
CC:	Chen Gang <gang.chen.5i5j@...il.com>,
	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 <jesper.nilsson@...s.com>
Subject: Re: [PATCH] arch/microblaze/kernel/setup.c: Add default 'screen_info"
 for fixing compiling break

On 09/16/2014 12:04 PM, Geert Uytterhoeven wrote:
> Hi Michal,
> 
> On Tue, Sep 16, 2014 at 11:23 AM, Michal Simek <monstr@...str.eu> wrote:
>> On 09/14/2014 11:02 AM, Chen Gang wrote:
>>> On 09/14/2014 04:45 PM, 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.
>>>>
>>>
>>> Welcome the related microblaze maintainers ideas for it
>>
>> Is this is just about VGA or video console in general?
>> There is xilinx FB driver and other FB are around too.
> 
> These days screen_info is only used by:
>   - vgacon,
>   - dummycon on ARM,
>   - a few fb drivers (efifb, intelfbdrv,sis, vesafb, and vga16fb).
> 
> E.g. m68k doesn't have it.

ok. IRC I think I remember one non mainline FB driver which required it too.
It breaks nothing for me that's why no problem to apply it.

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform



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