diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index a95a171e608c..75f2b6c82392 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -4,6 +4,7 @@
  *  Copyright (C) 2008 Thomas Gleixner <tglx@linutronix.de>
  *  Copyright (C) 2008-2009 Red Hat, Inc., Ingo Molnar
  *  Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
+ *  Copyright  ©  2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
  *
  *  For licensing details see kernel-base/COPYING
  */