diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
index 4a2e13870a9b1edaccd86976e8218ab2efac1cce..57bef4fbfb31cb65788caaa2e8ee654378aa3246 100644
--- a/kernel/locking/locktorture.c
+++ b/kernel/locking/locktorture.c
@@ -21,6 +21,9 @@
  *          Davidlohr Bueso <dave@stgolabs.net>
  *	Based on kernel/rcu/torture.c.
  */
+
+#define pr_fmt(fmt) fmt
+
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/kthread.h>
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index fb8094848906586e319d76f697a3c2da4929b13f..df29119b2013f1c3c7f716cc35ee7116ace5c0ca 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -19,6 +19,9 @@
  *
  * Authors: Paul E. McKenney <paulmck@us.ibm.com>
  */
+
+#define pr_fmt(fmt) fmt
+
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index a5540bd831c47f9d4129f53fc8281f6787a0360d..5604bfac8df4f23c05809db4fdc4920288970bdb 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -22,6 +22,9 @@
  *
  * See also:  Documentation/RCU/torture.txt
  */
+
+#define pr_fmt(fmt) fmt
+
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
diff --git a/kernel/torture.c b/kernel/torture.c
index 840fd33c1cda7148a16b15d46a608758295b82ee..1ac24a826589353396f02c98150049d134e6e7dd 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -20,6 +20,9 @@
  * Author: Paul E. McKenney <paulmck@us.ibm.com>
  *	Based on kernel/rcu/torture.c.
  */
+
+#define pr_fmt(fmt) fmt
+
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/init.h>