rcu_pointer_handoff
service = rcu_pointer_handoff(service);
service = rcu_pointer_handoff(service);
service = rcu_pointer_handoff(service);
service = rcu_pointer_handoff(service);
service = rcu_pointer_handoff(service);
service = rcu_pointer_handoff(service);
service = rcu_pointer_handoff(service);
return rcu_pointer_handoff(fence);
opt = rcu_pointer_handoff(opt);
hook = rcu_pointer_handoff(hook);