RWLOCK_OBJ_MAGIC
mo->ro_magic = RWLOCK_OBJ_MAGIC;
KASSERTMSG(mo->ro_magic == RWLOCK_OBJ_MAGIC,
__func__, mo, mo->ro_magic, RWLOCK_OBJ_MAGIC);
KASSERTMSG(mo->ro_magic == RWLOCK_OBJ_MAGIC,
__func__, mo, mo->ro_magic, RWLOCK_OBJ_MAGIC);