kernel/rcu/tree.c

122  * optimize synchronize_rcu() to a simple barrier().  When this variable
3478 	 * Inline kvfree() after synchronize_rcu(). We can do
3484 		synchronize_rcu();
3563  * synchronize_rcu - wait until a grace period has elapsed.
3568  * upon return from synchronize_rcu(), the caller might well be executing
3570  * synchronize_rcu() was waiting.
3580  * On systems with more than one CPU, when synchronize_rcu() returns,
3583  * preceded the call to synchronize_rcu().  In addition, each CPU having
3585  * synchronize_rcu() is guaranteed to have executed a full memory barrier
3586  * after the beginning of synchronize_rcu() and before the beginning of
3591  * Furthermore, if CPU A invoked synchronize_rcu(), which returned
3594  * synchronize_rcu() -- even if CPU A and CPU B are the same CPU (but
3600 void synchronize_rcu(void)
3608 			 "Illegal synchronize_rcu() in RCU read-side critical section");
3637 EXPORT_SYMBOL_GPL(synchronize_rcu);
3783  * on the one hand or by directly invoking either synchronize_rcu() or
3797  * it can miss a grace period when synchronize_rcu() runs concurrently
3802  * would be provided by a synchronize_rcu() that was invoked at the call
3826  * to cond_synchronize_rcu() or by directly invoking synchronize_rcu().
3839  * be provided by a synchronize_rcu() that was invoked at the call to
3846  * field is updated.  Therefore, if a single synchronize_rcu() is to
3872  * Otherwise, invoke synchronize_rcu() to wait for a full grace period.
3880  * would be provided by a synchronize_rcu() that was invoked at the call
3887 		synchronize_rcu();
3898  * obtained, just return.  Otherwise, invoke synchronize_rcu() to wait
3907  * would be provided by a synchronize_rcu() that was invoked at the call
3914 		synchronize_rcu();