Date: Fri, 11 Oct 2013 23:53:27 -0700
From: Josh Triplett <josh@joshtriplett.org>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, laijs@cn.fujitsu.com,
        dipankar@in.ibm.com, akpm@linux-foundation.org,
        mathieu.desnoyers@efficios.com, niv@us.ibm.com, tglx@linutronix.de,
        peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com,
        edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com,
        sbw@mit.edu, fengguang.wu@intel.com, stephen@networkplumber.org,
        davem@davemloft.net, bridge@lists.linux-foundation.org,
        netdev@vger.kernel.org, tgraf@suug.ch, gaofeng@cn.fujitsu.com,
        linux-decnet-user@lists.sourceforge.net, kuznet@ms2.inr.ac.ru,
        jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net,
        linville@tuxdriver.com, johannes@sipsolutions.net
Subject: Re: [PATCH v3 tip/core/rcu 0/14] Sparse-related updates for 3.13
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References: <20131011231659.GA28062@linux.vnet.ibm.com>
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On Fri, Oct 11, 2013 at 04:16:59PM -0700, Paul E. McKenney wrote:
> Changes from v2:
> 
> o	Switch from rcu_assign_pointer() to ACCESS_ONCE() given that
> 	the pointers are all --rcu and already visible to readers,
> 	as suggested by Eric Dumazet and Josh Triplett.

Hang on a moment.  Do *none* of these cases need write memory barriers?

- Josh Triplet
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