On Mon, 23 May 2016, Paul E. McKenney wrote:
But rcu_read_lock() does not exclude updates, which is one reason why pointer reads use rcu_dereference() rather than normal assignments.
Yes, I was referring to readers. With updates, otoh, are done holding a number of locks.
So I do not believe that rcu_read_lock() is helping you in this case. That said, it is a bit hard to imagine the compiler tearing a load from an int...
Oh, right, good point. Thanks, Davidlohr
