mly_user_health
static int mly_user_health(struct mly_softc *, struct mly_user_health *);
rv = mly_user_health(mly, (void *)data);
mly_user_health(struct mly_softc *mly, struct mly_user_health *uh)
#define MLYIO_HEALTH _IOW('M', 201, struct mly_user_health)