From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Thu, 6 Nov 2008 21:48:24 +0000 (-0800)
Subject: x86, xen: fix use of pgd_page now that it really does return a page
X-Git-Tag: v2.6.28-rc4~16^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47cb2ed9df2789fc4a3fe1201e475078f93c4839;p=pandora-kernel.git

x86, xen: fix use of pgd_page now that it really does return a page

Impact: fix 32-bit Xen guest boot crash

On 32-bit PAE, pud_page, for no good reason, didn't really return a
struct page *.  Since Jan Beulich's fix "i386/PAE: fix pud_page()",
pud_page does return a struct page *.

Because PAE has 3 pagetable levels, the pud level is folded into the
pgd level, so pgd_page() is the same as pud_page(), and now returns
a struct page *.  Update the xen/mmu.c code which uses pgd_page()
accordingly.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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