Message-ID: <4D0943D5.1090404@kernel.org>
Date: Wed, 15 Dec 2010 14:40:21 -0800
From: Yinghai Lu <yinghai@kernel.org>
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To: "H. Peter Anvin" <hpa@zytor.com>
CC: Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Wu Fengguang <fengguang.wu@intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Nikanth Karthikesan <knikanth@suse.de>,
        David Rientjes <rientjes@google.com>,
        "Zheng, Shaohui" <shaohui.zheng@intel.com>,
        "linux-hotplug@vger.kernel.org" <linux-hotplug@vger.kernel.org>,
        Eric Dumazet <eric.dumazet@gmail.com>,
        Bjorn Helgaas <bjorn.helgaas@hp.com>,
        Venkatesh Pallipadi <venki@google.com>, Nikhil Rao <ncrao@google.com>,
        Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Subject: Re: [PATCH] x86, acpi: Handle all SRAT cpu entries even have cpu
 num limitation
References: <20101111100628.GA24728@localhost> <1289478978.2084.74.camel@laptop> <20101111124015.GA9706@localhost> <1289480656.2084.80.camel@laptop> <20101113084018.GA23098@localhost> <1289644224.2084.521.camel@laptop> <20101113120030.GA31517@localhost> <1289653078.2084.675.camel@laptop> <20101113131042.GA5522@localhost> <4CDEE314.6090107@kernel.org> <20101113235746.GA9458@localhost> <4CDF3DA1.2090806@kernel.org> <4D093ABB.4030206@zytor.com>
In-Reply-To: <4D093ABB.4030206@zytor.com>
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On 12/15/2010 02:01 PM, H. Peter Anvin wrote:
> On 11/13/2010 05:38 PM, Yinghai Lu wrote:
>> Index: linux-2.6/arch/x86/kernel/acpi/boot.c
>> ===================================================================
>> --- linux-2.6.orig/arch/x86/kernel/acpi/boot.c
>> +++ linux-2.6/arch/x86/kernel/acpi/boot.c
>> @@ -198,6 +198,13 @@ static void __cpuinit acpi_register_lapi
>>  {
>>  	unsigned int ver = 0;
>>  
>> +#ifdef CONFIG_X86_64
>> +	if (id >= (MAX_APICS-1)) {
>> +		printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
>> +		return;
>> +	}
>> +#endif
>> +
>>  	if (!enabled) {
>>  		++disabled_cpus;
>>  		return;
> 
> Why the #ifdef?

try to limit the affects to 32bit's bunch sub arch etc.

Thanks

	Yinghai

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