Use the new interface to boost readability.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1489151370-15453-3-git-send-email-peterx@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>