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x86/mm: fix mod_l1_entry() return value when encountering r/o MMIO page

While putting together the workaround announced in
http://lists.xen.org/archives/html/xen-devel/2012-06/msg00709.html, I
found that mod_l1_entry(), upon encountering a set bit in
mmio_ro_ranges, would return 1 instead of 0 (the removal of the write
permission is supposed to be entirely transparent to the caller, even
more so to the calling guest).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
xen-unstable changeset: 25487:baa85434d0ec
xen-unstable date: Thu Jun 21 11:30:59 2012 +0200
author Jan Beulich <jbeulich@novell.com>
date Mon Jul 09 10:30:16 2012 +0100 (2012-07-09)
parents a1626e972148
line source
1 *.size
2 *.pyc
3 checker
4 checker.c
5 ia64.h
6 x86_32.h
7 x86_64.h