struct rcu_synchronize rcu;  init_completion(&rcu.completion);  call_rcu(&rcu.head, wakeme_after_rcu);   wait_for_completion(&rcu.completion);
synchronize_rcu();
void synchronize_kernel(void){	struct rcu_synchronize rcu;	init_completion(&rcu.completion);	/* Will wake me after RCU finished */	call_rcu(&rcu.head, wakeme_after_rcu);	/* Wait for it */	wait_for_completion(&rcu.completion);}