--- a/src/hotspot/share/runtime/interfaceSupport.cpp	Mon Nov 25 12:32:40 2019 +0100
+++ b/src/hotspot/share/runtime/interfaceSupport.cpp	Mon Nov 25 12:33:15 2019 +0100
@@ -87,7 +87,7 @@
   _name = elementName;
   uintx count = 0;
 
-  while (Atomic::cmpxchg(1, &RuntimeHistogram_lock, 0) != 0) {
+  while (Atomic::cmpxchg(&RuntimeHistogram_lock, 0, 1) != 0) {
     while (Atomic::load_acquire(&RuntimeHistogram_lock) != 0) {
       count +=1;
       if ( (WarnOnStalledSpinLock > 0)