--- old/src/hotspot/share/prims/unsafe.cpp	2018-03-22 16:37:50.220885268 +0100
+++ new/src/hotspot/share/prims/unsafe.cpp	2018-03-22 16:37:50.020885275 +0100
@@ -209,7 +209,7 @@
   }
 
   T get() {
-    if (oopDesc::is_null(_obj)) {
+    if (_obj == NULL) {
       GuardUnsafeAccess guard(_thread);
       T ret = RawAccess<>::load(addr());
       return normalize_for_read(ret);
@@ -220,7 +220,7 @@
   }
 
   void put(T x) {
-    if (oopDesc::is_null(_obj)) {
+    if (_obj == NULL) {
       GuardUnsafeAccess guard(_thread);
       RawAccess<>::store(addr(), normalize_for_write(x));
     } else {
@@ -230,7 +230,7 @@
 
 
   T get_volatile() {
-    if (oopDesc::is_null(_obj)) {
+    if (_obj == NULL) {
       GuardUnsafeAccess guard(_thread);
       volatile T ret = RawAccess<MO_SEQ_CST>::load(addr());
       return normalize_for_read(ret);
@@ -241,7 +241,7 @@
   }
 
   void put_volatile(T x) {
-    if (oopDesc::is_null(_obj)) {
+    if (_obj == NULL) {
       GuardUnsafeAccess guard(_thread);
       RawAccess<MO_SEQ_CST>::store(addr(), normalize_for_write(x));
     } else {
@@ -871,7 +871,7 @@
 
 UNSAFE_ENTRY(jint, Unsafe_CompareAndExchangeInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) {
   oop p = JNIHandles::resolve(obj);
-  if (oopDesc::is_null(p)) {
+  if (p == NULL) {
     volatile jint* addr = (volatile jint*)index_oop_from_field_offset_long(p, offset);
     return RawAccess<>::atomic_cmpxchg(x, addr, e);
   } else {
@@ -882,7 +882,7 @@
 
 UNSAFE_ENTRY(jlong, Unsafe_CompareAndExchangeLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) {
   oop p = JNIHandles::resolve(obj);
-  if (oopDesc::is_null(p)) {
+  if (p == NULL) {
     volatile jlong* addr = (volatile jlong*)index_oop_from_field_offset_long(p, offset);
     return RawAccess<>::atomic_cmpxchg(x, addr, e);
   } else {
@@ -902,7 +902,7 @@
 
 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSetInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) {
   oop p = JNIHandles::resolve(obj);
-  if (oopDesc::is_null(p)) {
+  if (p == NULL) {
     volatile jint* addr = (volatile jint*)index_oop_from_field_offset_long(p, offset);
     return RawAccess<>::atomic_cmpxchg(x, addr, e) == e;
   } else {
@@ -913,7 +913,7 @@
 
 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSetLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) {
   oop p = JNIHandles::resolve(obj);
-  if (oopDesc::is_null(p)) {
+  if (p == NULL) {
     volatile jlong* addr = (volatile jlong*)index_oop_from_field_offset_long(p, offset);
     return RawAccess<>::atomic_cmpxchg(x, addr, e) == e;
   } else {