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Subject: Re: [RFC PATCH 5/6] implement per-cpu&per-domain state machine
 call_srcu()
From: Peter Zijlstra <peterz@infradead.org>
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Date: Tue, 13 Mar 2012 00:18:39 +0100
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On Mon, 2012-03-12 at 16:15 -0700, Paul E. McKenney wrote:
> We need rcu_barrier() in order to be able to safely unload modules
> that
> use call_rcu(). 

Oh, right.. I always forget about modules.