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Date:   Tue, 26 Jun 2018 19:14:54 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc:     linux-kernel@vger.kernel.org, mingo@kernel.org,
        jiangshanlai@gmail.com, dipankar@in.ibm.com,
        akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
        josh@joshtriplett.org, tglx@linutronix.de, rostedt@goodmis.org,
        dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com,
        oleg@redhat.com, joel@joelfernandes.org
Subject: Re: [PATCH tip/core/rcu 16/27] rcu: Add comment documenting how
 rcu_seq_snap works
Message-ID: <20180626171454.GI2494@hirez.programming.kicks-ass.net>
References: <20180626003448.GA26209@linux.vnet.ibm.com>
 <20180626003513.27812-16-paulmck@linux.vnet.ibm.com>
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On Mon, Jun 25, 2018 at 05:35:02PM -0700, Paul E. McKenney wrote:
> From: "Joel Fernandes (Google)" <joel@joelfernandes.org>
> 
> rcu_seq_snap may be tricky to decipher. Lets document how it works with
> an example to make it easier.

Since you had me looking at them functions; why isn't rcu_seq_snap()
using smp_load_acquire() and rcu_seq_end() using smp_store_release() ?
Their respective comments seem to suggest that would be sufficent.