unregister_restart_handler
unregister_restart_handler(&a500_ec_restart_handler);
unregister_restart_handler(&kb3930_restart_nb);
unregister_restart_handler(&ntxec_restart_handler);
unregister_restart_handler(&rn5t618_restart_handler);
unregister_restart_handler(&pwrseq->reset_nb);
unregister_restart_handler(&reset->nb);
unregister_restart_handler(&wdt_restart_handler);
unregister_restart_handler(&wdt_restart_handler);
res = unregister_restart_handler(&at91rm9200_restart_nb);
unregister_restart_handler(&wdd->restart_nb);
extern int unregister_restart_handler(struct notifier_block *);
EXPORT_SYMBOL(unregister_restart_handler);