On Wed, 2013-05-22 at 02:58 -0700, Paul E. McKenney wrote:

> Now that I am more awake...
> 
> The RCU list macros assume that the list header is either statically
> allocated (in which case no ACCESS_ONCE() or whatever is needed) or
> that the caller did whatever was necessary to protect the list header,
> whether that be holding the right lock, using rcu_dereference() when
> traversing the pointer to the list header, or whatever.

Not sure what you mean, we do hold rcu_read_lock() here.

But when we jump back to begin, we do not do
"rcu_read_unlock()/rcu_read_lock()" pair.



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