The index wasn't calculated correctly (off by one) for huge spte so KVM guest
was unstable with transparent hugepages.
Signed-off-by: NAndrea Arcangeli <aarcange@redhat.com>
Reviewed-by: NReviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>