commit a82274151af2b075163e3c42c828529dee311487
author Alexander Z Lam <azl@google.com> Mon Jul 01 19:37:54 2013 -0700
committer Steven Rostedt <rostedt@goodmis.org> Mon Jul 01 23:30:08 2013 -0400
tree 0923f9f765266925e9c800a461917ea312d3cc16
parent 2d71619c59fac95a5415a326162fa046161b938c

tracing: Protect ftrace_trace_arrays list in trace_events.c

There are multiple places where the ftrace_trace_arrays list is accessed in
trace_events.c without the trace_types_lock held.

Link: http://lkml.kernel.org/r/1372732674-22726-1-git-send-email-azl@google.com

Cc: Vaibhav Nagarnaik <vnagarnaik@google.com>
Cc: David Sharp <dhsharp@google.com>
Cc: Alexander Z Lam <lambchop468@gmail.com>
Cc: stable@vger.kernel.org # 3.10
Signed-off-by: Alexander Z Lam <azl@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

kernel/trace/trace.c

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index e04e711..e36da7f 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -266,7 +266,7 @@
 /*
  * trace_types_lock is used to protect the trace_types list.
  */
-static DEFINE_MUTEX(trace_types_lock);
+DEFINE_MUTEX(trace_types_lock);
 
 /*
  * serialize the access of the ring buffer