From: Jeremy Fitzhardinge <jeremy@xensource.com>
Date: Wed, 18 Jul 2007 01:37:05 +0000 (-0700)
Subject: xen: ignore RW mapping of RO pages in pagetable_init
X-Git-Tag: v2.6.23-rc1~498^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9a4029fd3409eb224eb62c32d9792071382694ec;p=pandora-kernel.git

xen: ignore RW mapping of RO pages in pagetable_init

When setting up the initial pagetable, which includes mappings of all
low physical memory, ignore a mapping which tries to set the RW bit on
an RO pte.  An RO pte indicates a page which is part of the current
pagetable, and so it cannot be allowed to become RW.

Once xen_pagetable_setup_done is called, set_pte reverts to its normal
behaviour.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: ebiederm@xmission.com (Eric W. Biederman)
---

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