From 1bb539ca36e21c2f4fce0865e11df384bc7b7656 Mon Sep 17 00:00:00 2001
From: Steven Rostedt <rostedt@goodmis.org>
Date: Tue, 28 May 2013 14:38:43 -0400
Subject: [PATCH] ftrace: Use the rcu _notrace variants for
 rcu_dereference_raw() and friends

As rcu_dereference_raw() under RCU debug config options can add quite a
bit of checks, and that tracing uses rcu_dereference_raw(), these checks
happen with the function tracer. The function tracer also happens to trace
these debug checks too. This added overhead can livelock the system.

Have the function tracer use the new RCU _notrace equivalents that do
not do the debug checks for RCU.

Link: http://lkml.kernel.org/r/20130528184209.467603904@goodmis.org

Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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