From: Steven Rostedt (Red Hat) <rostedt@goodmis.org>
Date: Sat, 31 Aug 2013 05:04:07 +0000 (-0400)
Subject: ftrace/rcu: Do not trace debug_lockdep_rcu_enabled()
X-Git-Tag: v3.12-rc1~79^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a0a5a0561f63905fe94c49bc567615829f42ce1e;p=pandora-kernel.git

ftrace/rcu: Do not trace debug_lockdep_rcu_enabled()

The function debug_lockdep_rcu_enabled() is part of the RCU lockdep
debugging, and is called very frequently. I found that if I enable
a lot of debugging and run the function graph tracer, this
function can cause a live lock of the system.

We don't usually trace lockdep infrastructure, no need to trace
this either.

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