linux-kernel - Re: [PATCH -next] x86 mrst: fix build error when X86

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Date:	Thu, 29 Sep 2011 16:16:29 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH -next] x86 mrst: fix build error when X86_MRST is not
 enabled

On 09/29/11 15:57, Alan Cox wrote:
> On Thu, 29 Sep 2011 13:35:16 -0700
> Randy Dunlap <rdunlap@...otime.net> wrote:
> 
>> From: Randy Dunlap <rdunlap@...otime.net>
>>
>> Fix build when CONFIG_X86_INTEL_MID is enabled but
>> CONFIG_X86_MRST is not enabled.  Fixes this build error:
> 
> This looks wrong. Unfortunately until we get kernel.org back its hard to
> do much about it and see what is in all the trees.
> 
>> -#ifdef CONFIG_X86_INTEL_MID
>> +#ifdef CONFIG_X86_MRST
>>  
>>  static inline enum mrst_cpu_type mrst_identify_cpu(void)
>>  {
>>  	return __mrst_cpu_chip;
>>  }
>>  
>> -#else /* !CONFIG_X86_INTEL_MID */
>> +#else /* !CONFIG_X86_MRST */
>>  
>>  #define mrst_identify_cpu()    (0)
>>  
>> -#endif /* !CONFIG_X86_INTEL_MID */
>> +#endif /* !CONFIG_X86_MRST */
> 
> This breaks Medfield so NAK
> 
> The correct behaviour should be 
> 
> INTEL_MID defined -> mrst_cpu_chip has meaning
> INTEL_MID not defined -> mrst_identify_chip is 0
> 
> your change makes it 0 for Medfield which means it will crash on boot.

arch/x86/platform/mrst/mrst.c -- where __mrst_cpu_chip lives --
is only built when CONFIG_X86_MRST is enabled.  You make it sound like
__mrst_cpu_chip needs to live any time that CONFIG_X86_INTEL_MID
is enabled, which sounds reasonable to me.

caveat:  given the current linux-next merge trees (as you mentioned).

Does anyone care?  If so, please help fix this muck.


-- 
~Randy
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