diff a/src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.hpp b/src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.hpp
--- a/src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.hpp
+++ b/src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.hpp
@@ -47,10 +47,12 @@
                                   bool isLU, Register cnt1, Register cnt2,
                                   Register tmp1, Register tmp2, Register tmp3,
                                   const int STUB_THRESHOLD, Label *STUB, Label *DONE);
 
  public:
+  void entry_barrier();
+
   // Code used by cmpFastLock and cmpFastUnlock mach instructions in .ad file.
   void fast_lock(Register object, Register box,
                  Register tmp1, Register tmp2, Register tmp3, Register tmp4);
   void fast_unlock(Register object, Register box,
                    Register tmp1, Register tmp2, Register tmp3);