From: Huang Ying <ying.huang@intel.com>
Date: Tue, 22 Jun 2010 06:23:11 +0000 (+0800)
Subject: KVM: Fix a race condition for usage of is_hwpoison_address()
X-Git-Tag: v2.6.36-rc1~580^2~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bbeb34062fbad287c949a945a516a0c15b179993;p=pandora-kernel.git

KVM: Fix a race condition for usage of is_hwpoison_address()

is_hwpoison_address accesses the page table, so the caller must hold
current->mm->mmap_sem in read mode. So fix its usage in hva_to_pfn of
kvm accordingly.

Comment is_hwpoison_address to remind other users.

Reported-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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