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Date: Tue, 16 Feb 2010 15:53:05 -0800
From: Yinghai Lu <yinghai@kernel.org>
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To: "H. Peter Anvin" <hpa@zytor.com>
CC: Stephen Rothwell <sfr@canb.auug.org.au>, Ingo Molnar <mingo@elte.hu>,
       Thomas Gleixner <tglx@linutronix.de>,
       Andrew Morton <akpm@linux-foundation.org>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Jesse Barnes <jbarnes@virtuousgeek.org>,
       Christoph Lameter <cl@linux-foundation.org>,
       linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH 27/35] core: move early_res
References: <1265793639-15071-1-git-send-email-yinghai@kernel.org>	<1265793639-15071-28-git-send-email-yinghai@kernel.org> <20100215011615.e3d35121.sfr@canb.auug.org.au> <4B786110.9020806@kernel.org> <4B7B2E3B.9060903@zytor.com>
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On 02/16/2010 03:46 PM, H. Peter Anvin wrote:
> On 02/14/2010 12:46 PM, Yinghai Lu wrote:
>>
>> please check
>>
>> Subject: [PATCH -v2] x86: fix cross-arch compiling
>>
>> Ingo found:
>> lots of cross-arch build failures in latest -tip:
>>
>>  
>> +u64 __init __weak get_max_mapped(void)
>> +{
>> +	panic("should have get_max_mapped defined with arch");
>> +
>> +	return -1ULL;
>> +}
>> +
> 
> All this does would seem is it would change a build failure into a
> runtime panic.  I really fail to see how this is an improvement...

current only x86 support to early_res replace bootmem.

later if other arch is using that feature, it need to provide that get_max_mapped.

Yinghai