linux-kernel - Re: 2.6.23-rc8-mm1 - powerpc memory hotplug link failure

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Message-ID: <46FA15C7.9020603@linux.vnet.ibm.com>
Date:	Wed, 26 Sep 2007 13:48:15 +0530
From:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
To:	Badari Pulavarty <pbadari@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, kamezawa.hiroyu@...fujitsu.com,
	Andy Whitcroft <apw@...dowen.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>
Subject: Re: 2.6.23-rc8-mm1 - powerpc memory hotplug link failure

Badari Pulavarty wrote:
> On Wed, 2007-09-26 at 01:30 +0530, Kamalesh Babulal wrote:
>> Hi Andrew,
>>
>> The 2.6.23-rc8-mm1 kernel linking fails on the powerpc (P5+) box
>>
>>   CC      init/version.o
>>   LD      init/built-in.o
>>   LD      .tmp_vmlinux1
>> drivers/built-in.o: In function `memory_block_action':
>> /root/scrap/linux-2.6.23-rc8/drivers/base/memory.c:188: undefined reference to `.remove_memory'
>> make: *** [.tmp_vmlinux1] Error 1
>>
> 
> I ran into the same thing earlier. Here is the fix I made.
> 
> Thanks,
> Badari
> 
> Memory hotplug remove is currently supported only on IA64
> 
> Signed-off-by: Badari Pulavarty <pbadari@...ibm.com>
> 
> Index: linux-2.6.23-rc8/mm/Kconfig
> ===================================================================
> --- linux-2.6.23-rc8.orig/mm/Kconfig	2007-09-25 14:44:03.000000000 -0700
> +++ linux-2.6.23-rc8/mm/Kconfig	2007-09-25 14:44:48.000000000 -0700
> @@ -143,6 +143,7 @@ config MEMORY_HOTREMOVE
>  	bool "Allow for memory hot remove"
>  	depends on MEMORY_HOTPLUG
>  	depends on MIGRATION
> +	depends on (IA64)
> 
>  # Heavily threaded applications may benefit from splitting the mm-wide
>  # page_table_lock, so that faults on different parts of the user address
> 
> 
> -
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Hi Badari,

Thanks, your patch fixed the problem.

-- 
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
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