diff -r 4cbfa5077d68 -r 623722a6aeb9 src/hotspot/share/runtime/os.cpp
--- a/src/hotspot/share/runtime/os.cpp	Mon Nov 25 12:32:40 2019 +0100
+++ b/src/hotspot/share/runtime/os.cpp	Mon Nov 25 12:33:15 2019 +0100
@@ -855,7 +855,7 @@
   while (true) {
     unsigned int seed = _rand_seed;
     unsigned int rand = random_helper(seed);
-    if (Atomic::cmpxchg(rand, &_rand_seed, seed) == seed) {
+    if (Atomic::cmpxchg(&_rand_seed, seed, rand) == seed) {
       return static_cast<int>(rand);
     }
   }
@@ -1804,7 +1804,7 @@
 os::SuspendResume::State os::SuspendResume::switch_state(os::SuspendResume::State from,
                                                          os::SuspendResume::State to)
 {
-  os::SuspendResume::State result = Atomic::cmpxchg(to, &_state, from);
+  os::SuspendResume::State result = Atomic::cmpxchg(&_state, from, to);
   if (result == from) {
     // success
     return to;