linux-kernel - Re: 回复： [PATCH] arch/unicore32/kernel/setup.c: add generic 'screen

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Date:	Wed, 21 May 2014 17:10:45 +0800
From:	Chen Gang <gang.chen.5i5j@...il.com>
To:	管雪涛 <gxt@....edu.cn>
CC:	Guan Xuetao <gxt@...c.pku.edu.cn>, linux-kernel@...r.kernel.org
Subject: Re: 回复： [PATCH] arch/unicore32/kernel/setup.c: add generic 'screen_info' to avoid compiling failure

On 05/21/2014 04:01 PM, 管雪涛 wrote:
> 
> ----- Chen Gang <gang.chen.5i5j@...il.com> 写道：
>> Add generic 'screen_info' just like another architectures have done
>> (e.g. tile, sh, score, ia64, hexagon, and cris).
>>
>> The related error (with allmodconfig under unicore32):
>>
>>     LD      init/built-in.o
>>   drivers/built-in.o: In function `vgacon_save_screen':
>>   powercap_sys.c:(.text+0x21788): undefined reference to `screen_info'
>>   drivers/built-in.o: In function `vgacon_resize':
>>   powercap_sys.c:(.text+0x21b54): undefined reference to `screen_info'
>>   drivers/built-in.o: In function `vgacon_switch':
>>   powercap_sys.c:(.text+0x21cb4): undefined reference to `screen_info'
>>   drivers/built-in.o: In function `vgacon_init':
>>   powercap_sys.c:(.text+0x2296c): undefined reference to `screen_info'
>>   drivers/built-in.o: In function `vgacon_startup':
>>   powercap_sys.c:(.text+0x22e80): undefined reference to `screen_info'
>>
>>
>> Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
>> ---
>>  arch/unicore32/kernel/setup.c | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/arch/unicore32/kernel/setup.c b/arch/unicore32/kernel/setup.c
>> index 87adbf5..94bc4bc 100644
>> --- a/arch/unicore32/kernel/setup.c
>> +++ b/arch/unicore32/kernel/setup.c
>> @@ -53,6 +53,8 @@ struct stack {
>>  
>>  static struct stack stacks[NR_CPUS];
>>  
>> +struct screen_info screen_info;
>> +
> 
> could be as following if it's only used by vga console:
> 
> +#ifdef CONFIG_VGA_CONSOLE
> +struct screen_info screen_info;
> +#endif
> 

Yeah, I shall send patch v2 for it (within this week). And also thank
you for your review the other patches.

BTW: I guess, it only leaves 2 kernel related issues for allmodconfig:

 - one for 'find_first*', 'cpuc_coherent_kern_range' and 'pm_power_off'.
   I guess, we can export their symbol explicitly to fix this issue.

 - the other for additional 'clk_*' which are needed when HAVE_CLK.
   I guess, just "copy/past" the other platforms' implementation is OK.

The related errors:

  ERROR: "clk_round_rate" [sound/spi/snd-at73c213.ko] undefined!
  ERROR: "clk_set_parent" [sound/soc/jz4740/snd-soc-jz4740-i2s.ko] undefined!
  ERROR: "clk_round_rate" [sound/soc/fsl/snd-soc-fsl-ssi.ko] undefined!
  ERROR: "clk_round_rate" [sound/soc/fsl/snd-soc-fsl-spdif.ko] undefined!
  ERROR: "find_first_bit" [sound/soc/codecs/snd-soc-uda1380.ko] undefined!
  ERROR: "find_first_zero_bit" [net/sctp/sctp.ko] undefined!
  ERROR: "find_first_bit" [net/phonet/phonet.ko] undefined!
  ERROR: "find_first_zero_bit" [net/nfc/nfc.ko] undefined!
  ERROR: "find_first_zero_bit" [net/netfilter/nf_tables.ko] undefined!
  ERROR: "find_first_bit" [net/mac80211/mac80211.ko] undefined!
  ERROR: "find_first_zero_bit" [net/bridge/bridge.ko] undefined!
  ERROR: "find_first_bit" [net/bridge/bridge.ko] undefined!
  ERROR: "find_first_zero_bit" [fs/reiserfs/reiserfs.ko] undefined!
  ERROR: "find_first_bit" [fs/ocfs2/ocfs2.ko] undefined!
  ERROR: "find_first_zero_bit" [fs/ocfs2/cluster/ocfs2_nodemanager.ko] undefined!
  ERROR: "find_first_bit" [fs/ocfs2/cluster/ocfs2_nodemanager.ko] undefined!
  ERROR: "find_first_zero_bit" [fs/nfs/nfsv4.ko] undefined!
  ERROR: "find_first_zero_bit" [fs/minix/minix.ko] undefined!
  ERROR: "find_first_bit" [fs/hfsplus/hfsplus.ko] undefined!
  ERROR: "find_first_zero_bit" [fs/gfs2/gfs2.ko] undefined!
  ERROR: "find_first_zero_bit" [fs/bfs/bfs.ko] undefined!
  ERROR: "find_first_zero_bit" [drivers/uwb/uwb.ko] undefined!
  ...

Thanks.
-- 
Chen Gang

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