The code should only be enabled if CONFIG_VIRTIO_BALLOON has been
set. This can be done best if the code resides in a separate file.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1532521224-27235-4-git-send-email-thuth@redhat.com>
Signed-off-by: NCornelia Huck <cohuck@redhat.com>