--- old/src/hotspot/share/runtime/synchronizer.cpp	2019-08-13 12:39:55.224315708 +0200
+++ new/src/hotspot/share/runtime/synchronizer.cpp	2019-08-13 12:39:54.924310505 +0200
@@ -351,7 +351,7 @@
              THREAD->is_lock_owned((address)mark.locker())) {
     assert(lock != mark.locker(), "must not re-lock the same lock");
     assert(lock != (BasicLock*)obj->mark().value(), "don't relock with same BasicLock");
-    lock->set_displaced_header(markWord(0));
+    lock->set_displaced_header(markWord::from_pointer(NULL));
     return;
   }
 
@@ -718,12 +718,12 @@
   assert(!mark.has_bias_pattern(), "invariant");
 
   if (mark.is_neutral()) {
-    hash = mark.hash();              // this is a normal header
+    hash = mark.hash();               // this is a normal header
     if (hash != 0) {                  // if it has hash, just return it
       return hash;
     }
     hash = get_next_hash(Self, obj);  // allocate a new hash code
-    temp = mark.copy_set_hash(hash); // merge the hash code into header
+    temp = mark.copy_set_hash(hash);  // merge the hash code into header
     // use (machine word version) atomic operation to install the hash
     test = obj->cas_set_mark(temp, mark);
     if (test == mark) {
@@ -1477,7 +1477,7 @@
     m->_SpinDuration = ObjectMonitor::Knob_SpinLimit;       // consider: keep metastats by type/class
 
     if (object->cas_set_mark(markWord::encode(m), mark) != mark) {
-      m->set_header(markWord(0));
+      m->set_header(markWord(markWord::zero));
       m->set_object(NULL);
       m->Recycle();
       omRelease(Self, m, true);