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ftrace/rcu: Do not trace debug_lockdep_rcu_enabled()
authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>
Sat, 31 Aug 2013 05:04:07 +0000 (01:04 -0400)
committerSteven Rostedt <rostedt@goodmis.org>
Thu, 5 Sep 2013 13:31:33 +0000 (09:31 -0400)
commita0a5a0561f63905fe94c49bc567615829f42ce1e
tree25b3136d404317ee0298a7387cc7afdd90f34089tree | snapshot
parentaf058ab04d3d11383e5159132fc78a3700be3af5commit | diff
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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