srcu_notifier_chain_register
ret = srcu_notifier_chain_register(&cn->notifier_head, nb);
ret = srcu_notifier_chain_register(
ret = srcu_notifier_chain_register(
srcu_notifier_chain_register(&info->notifier_list, nb);
return srcu_notifier_chain_register(&lease_notifier_chain, nb);
extern int srcu_notifier_chain_register(struct srcu_notifier_head *nh,
EXPORT_SYMBOL_GPL(srcu_notifier_chain_register);