VTBALLOON_SLZ
#define VTBALLOON_ENTER_SLZ(_sc) lwkt_serialize_enter(VTBALLOON_SLZ(sc));
#define VTBALLOON_EXIT_SLZ(_sc) lwkt_serialize_exit(VTBALLOON_SLZ(sc));
lwkt_serialize_init(VTBALLOON_SLZ(sc));
error = virtio_setup_intr(dev, i, VTBALLOON_SLZ(sc));
zsleep(sc->vtballoon_td, VTBALLOON_SLZ(sc), 0, "vtbdth", 0);
lwkt_serialize_handler_disable(VTBALLOON_SLZ(sc));
ASSERT_SERIALIZED(VTBALLOON_SLZ(sc));
ASSERT_SERIALIZED(VTBALLOON_SLZ(sc));
ASSERT_SERIALIZED(VTBALLOON_SLZ(sc));
ASSERT_SERIALIZED(VTBALLOON_SLZ(sc));
ASSERT_SERIALIZED(VTBALLOON_SLZ(sc));
zsleep(sc, VTBALLOON_SLZ(sc), 0, "vtbspf", 0);
zsleep(sc, VTBALLOON_SLZ(sc), 0, "vtbslp", timeout);