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From: David Howells <dhowells@redhat.com>
In-Reply-To: <20171204215448.GY3326@worktop>
References: <20171204215448.GY3326@worktop> <1512157876-24665-1-git-send-email-paulmck@linux.vnet.ibm.com> <20171201195053.GA23494@linux.vnet.ibm.com> <15076.1512401936@warthog.procyon.org.uk> <20171204185215.GB7829@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: dhowells@redhat.com, "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        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, edumazet@google.com,
        fweisbec@gmail.com, oleg@redhat.com
Subject: Re: [PATCH tip/core/rcu 01/21] doc: READ_ONCE() now implies smp_barrier_depends()
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Date: Mon, 04 Dec 2017 22:39:05 +0000
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Peter Zijlstra <peterz@infradead.org> wrote:

> > Good point!  How about as shown in the updated patch below?
> 
> Humm, I thought the idea was to completely remove read_barrier_depends
> from the lkmm and memory-barriers.txt, making it an Alpha implementation
> detail.

memory-barriers.txt explains how the barriers used by the kernel work, amongst
other things.

Don't forget, btw, that Blackfin uses it also.

David