--- old/src/hotspot/cpu/s390/globals_s390.hpp	2020-02-25 17:43:46.000000000 -0500
+++ new/src/hotspot/cpu/s390/globals_s390.hpp	2020-02-25 17:43:45.000000000 -0500
@@ -76,10 +76,6 @@
 // 8146801 (Short Array Allocation): No performance work done here yet.
 define_pd_global(intx, InitArrayShortSize, 1*BytesPerLong);
 
-// ObjectMonitor ref_count not implemented in C2 fast_lock() or
-// fast_unlock() so use a handshake for safety.
-define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true);
-
 #define ARCH_FLAGS(develop,      \
                    product,      \
                    diagnostic,   \