vhost: Allow adjoining regions
My rework of section adding combines overlapping or adjoining regions, but checks they're actually the same underlying RAM block. Fix the case where two blocks adjoin but don't overlap; that new region should get added (but not combined), but my previous patch was disallowing it. Fixes: c1ece84eReported-by: NAlex Williamson <alex.williamson@redhat.com> Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com> Tested-by: NAlex Williamson <alex.williamson@redhat.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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