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

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Date:	Thu, 01 Mar 2007 08:02:50 +1100
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>, 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>
Subject: Re: [patch 04/26] Xen-paravirt_ops: Add pagetable accessors to
	pack and unpack pagetable entries

On Wed, 2007-02-28 at 09:32 +0100, Ingo Molnar wrote:
> * Jeremy Fitzhardinge <jeremy@...p.org> wrote:
> 
> > >> +#ifdef CONFIG_PARAVIRT
> > >> +/* After pte_t, etc, have been defined */
> > >> +#include <asm/paravirt.h>
> > >> +#endif
> > >>     
> > >
> > > hm - there's already a CONFIG_PARAVIRT conditional in 
> > > asm-i386/paravirt.h.
> > 
> > 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.

Yes, originally paravirt.h didn't define anything if !CONFIG_PARAVIRT
for this reason: getting it tied into the other headers correctly is a
PITA.

Rusty.


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