when initializing the devmapper driver, attempt to sync udev and device mapper. If udev sync is not supported, print a warning. Eventually we'll likely bail here to avoid unpredictable behavior for users. Signed-off-by: Vincent Batts <vbatts@redhat.com> Upstream-commit: 022e1232f84966c4b70a612bc35463ebb58e3137 Component: engine