--- a/hotspot/src/cpu/aarch64/vm/c1_LIRAssembler_aarch64.cpp	Tue Jul 05 17:57:20 2016 -0700
+++ b/hotspot/src/cpu/aarch64/vm/c1_LIRAssembler_aarch64.cpp	Thu Jul 07 15:07:13 2016 +0100
@@ -1556,13 +1556,13 @@
 }
 
 void LIR_Assembler::casw(Register addr, Register newval, Register cmpval) {
-  __ cmpxchg(addr, cmpval, newval, Assembler::word, /* acquire*/ true, /* release*/ true, rscratch1);
+  __ cmpxchg(addr, cmpval, newval, Assembler::word, /* acquire*/ true, /* release*/ true, /* weak*/ false, rscratch1);
   __ cset(rscratch1, Assembler::NE);
   __ membar(__ AnyAny);
 }
 
 void LIR_Assembler::casl(Register addr, Register newval, Register cmpval) {
-  __ cmpxchg(addr, cmpval, newval, Assembler::xword, /* acquire*/ true, /* release*/ true, rscratch1);
+  __ cmpxchg(addr, cmpval, newval, Assembler::xword, /* acquire*/ true, /* release*/ true, /* weak*/ false, rscratch1);
   __ cset(rscratch1, Assembler::NE);
   __ membar(__ AnyAny);
 }