--- a/hotspot/src/cpu/ppc/vm/globalDefinitions_ppc.hpp	Tue Jan 07 17:24:59 2014 +0100
+++ b/hotspot/src/cpu/ppc/vm/globalDefinitions_ppc.hpp	Thu Jan 16 14:25:51 2014 +0100
@@ -37,4 +37,7 @@
 // signatures accordingly.
 const bool CCallingConventionRequiresIntsAsLongs = true;
 
+// The PPC CPUs are NOT multiple-copy-atomic.
+#define CPU_NOT_MULTIPLE_COPY_ATOMIC
+
 #endif // CPU_PPC_VM_GLOBALDEFINITIONS_PPC_HPP