rw_panic
rw_panic("rw_destroy: lock already destroyed", lp);
rw_panic("rw_destroy: lock still active", lp);
rw_panic("rw_enter: bad rwlock", lp);
rw_panic("recursive rw_enter", lp);
rw_panic("rw_exit: not owner", lp);
rw_panic("rw_exit: lock not held", lp);
rw_panic("rw_downgrade: not owner", lp);