From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Date: Fri, 19 Nov 2010 09:02:35 +0000 (+0800)
Subject: KVM: MMU: don't drop spte if overwrite it from W to RO
X-Git-Tag: v2.6.38-rc1~244^2~70
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b330aa0c7df1ece45f45566c45ea44f01e379ab0;p=pandora-kernel.git

KVM: MMU: don't drop spte if overwrite it from W to RO

We just need flush tlb if overwrite a writable spte with a read-only one.

And we should move this operation to set_spte() for sync_page path

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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