--- old/src/hotspot/share/prims/jvm.cpp	2019-11-21 11:58:22.436201060 +0100
+++ new/src/hotspot/share/prims/jvm.cpp	2019-11-21 11:58:21.960193023 +0100
@@ -233,7 +233,7 @@
     _name = elementName;
     uintx count = 0;
 
-    while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
+    while (Atomic::cmpxchg(&JVMHistogram_lock, 0, 1) != 0) {
       while (Atomic::load_acquire(&JVMHistogram_lock) != 0) {
         count +=1;
         if ( (WarnOnStalledSpinLock > 0)