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Date:	Thu, 23 Feb 2012 16:58:34 +0000
From:	"Liu, Jinsong" <jinsong.liu@...el.com>
To:	Jan Beulich <jbeulich@...e.com>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>
CC:	"keir.xen@...il.com" <keir.xen@...il.com>,
	"Brown, Len" <len.brown@...el.com>,
	"Li, Shaohua" <shaohua.li@...el.com>,
	"lenb@...nel.org" <lenb@...nel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] RFC: Prepare PAD for native and xen platform

Jan Beulich wrote:
>>>> "Liu, Jinsong" <jinsong.liu@...el.com> 02/23/12 2:29 PM >>>
>> --- a/drivers/acpi/Kconfig
>> +++ b/drivers/acpi/Kconfig
>> @@ -213,10 +213,11 @@ config ACPI_HOTPLUG_CPU
>>    default y
>  >
>> config ACPI_PROCESSOR_AGGREGATOR
>> -    tristate "Processor Aggregator"
>> +    bool "Processor Aggregator"
> 
> There must be ways to address whatever strange problem you see without
> making this piece of code non-modular.
> 

Yes, another approach is x86_init approach, defining acpi_pad_ops at x86_init.c and overwritten when xen_start_kernel.
This patch is just a RFC patch, to evaluate which approch is more reasonable :-)

>>    depends on ACPI_PROCESSOR
>>    depends on EXPERIMENTAL
>>    depends on X86
>> +    default n
> 
> This is pointless.

Elaborate more? just a little curious why Kconfig has so many default n.

> 
>>    help
>>      ACPI 4.0 defines processor Aggregator, which enables OS to
>>      perform specific processor configuration and control that
>> applies to all 
> 
> Jan

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