linux-kernel - Re: [Xen-devel] 2.6.27 - SMP enabled, but only 1 CPU

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Message-Id: <49141E3B.76E4.0078.0@novell.com>
Date:	Fri, 07 Nov 2008 09:53:47 +0000
From:	"Jan Beulich" <jbeulich@...ell.com>
To:	"Ingo Molnar" <mingo@...e.hu>,
	"Jeremy Fitzhardinge" <jeremy@...p.org>
Cc:	"Ian Campbell" <Ian.Campbell@...rix.com>,
	"xen devel" <xen-devel@...ts.xensource.com>,
	"Christopher S. Aker" <caker@...shore.net>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] 2.6.27 - SMP enabled, but only 1 CPU

>>> Ingo Molnar <mingo@...e.hu> 06.11.08 23:20 >>>
>
>* Jeremy Fitzhardinge <jeremy@...p.org> wrote:
>
>> Ingo Molnar wrote:
>>> where exactly is that use? My grep didnt show any users of pud_page().  
>>> pud_page() was changed in an incompatible way, all users of it must be  
>>> updated.
>>>   
>>
>> pgd_page() uses it in pgtable-nopud.h, so any users of pgd_page() 
>> also need to be looked at.  It so happens the only user is 
>> arch/x86/xen/mmu.c, which expects it to return the vaddr.  Fixed 
>> below.
>
>ah! asm-generic was missed by my grep. (and i suspect Jan missed it 
>too)

Indeed - broken as it was I never even considered this could be used
somewhere in generic code.

>> Subject: xen: fix use of pgd_page now that it really does return a page
>
>applied to tip/x86/urgent, thanks!

And my thanks, too, Jeremy, for the quick spotting of the problem.

Jan

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