linux-kernel - Re: [PATCH 6/13] maps#2: Move the page walker code to lib/

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Message-ID: <461DD3FD.3070803@yahoo.com.au>
Date:	Thu, 12 Apr 2007 16:38:53 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Matt Mackall <mpm@...enic.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/13] maps#2: Move the page walker code to lib/

Matt Mackall wrote:
> On Wed, Apr 11, 2007 at 04:35:44PM +1000, Nick Piggin wrote:
> 
>>Matt Mackall wrote:
>>
>>>Move the page walker code to lib/
>>>
>>>This lets it get shared outside of proc/ and linked in only when
>>>needed.
>>
>>Still should go into mm/
>>
>>If it had, you might have also noticed your pagetable walking code
>>is completely different from how everyone else does it, and fixed
>>that too.
> 
> 
> I actually did notice that, when I compared it to jsgf's page walking
> code for Xen.

Can you fix it then, since you are doing the big reorganisation?

>  
> 
>>BTW. Is it the case that unused and unexported symbols don't get
>>pruned by the linker except inside lib/?
> 
> 
> Yes, that's been my point all along. It also currently only happens at
> the granularity of an object file, not a symbol, FYI.

You have the config symbols, don't you? Please use them in the
makefile to prevent compiling and linking.

My point all along is that it belongs in mm/. If you don't want to
do it then I can't make you, but I'll submit a patch to use the
correct page table walking conventions and move it to mm/.

-- 
SUSE Labs, Novell Inc.
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