src/hotspot/cpu/ppc/sharedRuntime_ppc.cpp

*** 2428,2449 ****
    // In order for GC to work, don't clear the last_Java_sp until after blocking.
    Label after_transition;
    {
      Label no_block, sync;
  
-     if (os::is_MP()) {
        if (UseMembar) {
          // Force this write out before the read below.
          __ fence();
        } else {
          // Write serialization page so VM thread can do a pseudo remote membar.
          // We use the current thread pointer to calculate a thread specific
          // offset to write to within the page. This minimizes bus traffic
          // due to cache line collision.
          __ serialize_memory(R16_thread, r_temp_4, r_temp_5);
        }
-     }
  
      Register sync_state_addr = r_temp_4;
      Register sync_state      = r_temp_5;
      Register suspend_flags   = r_temp_6;
  
--- 2428,2447 ----