int cpu_hp_enable:1; /* Enable CPU hotplug notif. */
int hp_iter_enable:1; /* Enable hp iter notif. */
wait_queue_head_t read_wait; /* reader wait queue */
int cpu_hp_enable:1; /* Enable CPU hotplug notif. */
int hp_iter_enable:1; /* Enable hp iter notif. */
wait_queue_head_t read_wait; /* reader wait queue */