linux-kernel - Re: [patch 04/26] Xen-paravirt_ops: Add pagetable accessors to pack and unpack pagetable entries

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Date:	Wed, 28 Feb 2007 12:12:37 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Andi Kleen <ak@....de>, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, virtualization@...ts.osdl.org,
	xen-devel@...ts.xensource.com, Chris Wright <chrisw@...s-sol.org>,
	Zachary Amsden <zach@...are.com>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [patch 04/26] Xen-paravirt_ops: Add pagetable accessors to pack
 and unpack pagetable entries

Ingo Molnar wrote:
>> Yes, but it happens after asm/paravirt.h has already included some 
>> things, and it ends up causing problems.  paravirt.h still defines 
>> various stub functions in the !CONFIG_PARAVIRT case, so it needs to do 
>> the includes either way.
>>     
>
> hm, it then needs to be fixed first, instead of adding to the mess.
>   

OK, I've fixed this by hoisting all the native_* implementations into
pgtable.h.  In the !PARAVIRT case the normal macros directly use the
native_* functions, and in the PARAVIRT case they're used by the native
paravirt_ops.  This has the nice property of avoiding this specific
problem, and also generally removes code duplication.

    J
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