From: Peter Zijlstra <peterz@infradead.org>
Date: Mon, 25 Nov 2013 10:49:10 +0000 (+0100)
Subject: perf: Optimize ring-buffer write by depending on control dependencies
X-Git-Tag: v3.14-rc1~171^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7f2e3cd6c1f4932ccc4135d050eae3f7c7aef63;p=pandora-kernel.git

perf: Optimize ring-buffer write by depending on control dependencies

Remove a full barrier from the ring-buffer write path by relying on
a control dependency to order a LOAD -> STORE scenario.

Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-8alv40z6ikk57jzbaobnxrjl@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

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