void (*thread_online)(void);
void (*register_thread)(void);
void (*unregister_thread)(void);
void (*thread_online)(void);
void (*register_thread)(void);
void (*unregister_thread)(void);
.thread_online = rcu_thread_online, \
.register_thread = rcu_register_thread, \
.unregister_thread = rcu_unregister_thread,\
.thread_online = rcu_thread_online, \
.register_thread = rcu_register_thread, \
.unregister_thread = rcu_unregister_thread,\