kvm: region_add and region_del is not called on updates
Attributes are not updated via region_add()/region_del(). Attribute changes lead to a delete first, followed by a new add. If this would ever not be the case, we would get an error when trying to register the new slot. Signed-off-by: NDavid Hildenbrand <david@redhat.com> Message-Id: <20171016144302.24284-6-david@redhat.com> Tested-by: NJoe Clifford <joeclifford@gmail.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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