3.12.54-rt74-rc1 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Clark Williams <williams@redhat.com>

RT has dropped support of rcu_bh, comment out in rcutorture.

Signed-off-by: Clark Williams <williams@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 kernel/rcutorture.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index be63101c6175..a31bab6c70ad 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -473,6 +473,7 @@ static struct rcu_torture_ops rcu_ops = {
 	.name		= "rcu"
 };
 
+#ifndef CONFIG_PREEMPT_RT_FULL
 /*
  * Definitions for rcu_bh torture testing.
  */
@@ -515,6 +516,12 @@ static struct rcu_torture_ops rcu_bh_ops = {
 	.name		= "rcu_bh"
 };
 
+#else
+static struct rcu_torture_ops rcu_bh_ops = {
+	.ttype		= INVALID_RCU_FLAVOR,
+};
+#endif
+
 /*
  * Definitions for srcu torture testing.
  */
-- 
2.7.0