diff -up mozilla-aurora/js/src/jit/AtomicOperations.h.s390-atomic mozilla-aurora/js/src/jit/AtomicOperations.h

--- mozilla-aurora/js/src/jit/AtomicOperations.h.s390-atomic	2016-11-15 12:22:38.000000000 +0100

+++ mozilla-aurora/js/src/jit/AtomicOperations.h	2016-12-08 15:36:11.792439891 +0100

@@ -341,6 +341,9 @@ AtomicOperations::isLockfree(int32_t siz

 #  include "jit/none/AtomicOperations-ppc.h"

 # elif defined(__aarch64__)

 #  include "jit/arm64/AtomicOperations-arm64.h"

+# elif defined(__s390__)

+   // Also works with ppc atomic operations

+#  include "jit/none/AtomicOperations-ppc.h"

 # else

 #  include "jit/none/AtomicOperations-none.h" // These MOZ_CRASH() always

 # endif