linux-kernel - Re: [PATCH 16/16] rxrpc: Replace smp_read_barrier_depends() with lockless

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Message-ID: <24601.1415911646@warthog.procyon.org.uk>
Date:	Thu, 13 Nov 2014 20:47:26 +0000
From:	David Howells <dhowells@...hat.com>
To:	Pranith Kumar <bobby.prani@...il.com>
Cc:	dhowells@...hat.com, "David S. Miller" <davem@...emloft.net>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	netdev@...r.kernel.org (open list:NETWORKING [GENERAL]),
	linux-kernel@...r.kernel.org (open list),
	paulmck@...ux.vnet.ibm.com
Subject: Re: [PATCH 16/16] rxrpc: Replace smp_read_barrier_depends() with lockless_dereference()

Pranith Kumar <bobby.prani@...il.com> wrote:

> Recently lockless_dereference() was added which can be used in place of
> hard-coding smp_read_barrier_depends(). The following PATCH makes the change.

Actually, the use of smp_read_barrier_depends() is wrong in circular
buffering.  See Documentation/circular-buffers.txt

David
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