Documentation/RCU/checklist.rst

192 6.	Since synchronize_rcu() can block, it cannot be called
218 	If the updater uses call_rcu() or synchronize_rcu(),
238 8.	Although synchronize_rcu() is slower than is call_rcu(), it
241 	synchronize_rcu() is visible from userspace, synchronize_rcu()
244 	synchronize_rcu() without synchronize_rcu()'s multi-millisecond
248 	An especially important property of the synchronize_rcu()
250 	are delayed for whatever reason, then the synchronize_rcu()
289 	d.	Periodically invoke synchronize_rcu(), permitting a limited
393 14.	The whole point of call_rcu(), synchronize_rcu(), and friends
399 	synchronize_rcu(), or friends.
445 	The current (say) synchronize_rcu() implementation is -not-
462 	both rcu_barrier() and synchronize_rcu(), if necessary, using