get_online_cpus();for_each_online_cpu(cpu)if(__zswap_cpu_notifier(CPU_UP_PREPARE, cpu) != NOTIFY_OK)gotocleanup; register_cpu_notifier(&zswap_cpu_notifier_block); put_online_cpus();return0; cleanup:for_each_online_cpu(cpu) __zswap_cpu_notifier(CPU_UP_CANCELED, cpu); put_online_cpu...