src/hotspot/cpu/sparc/templateInterpreterGenerator_sparc.cpp

@@ -1371,22 +1371,21 @@
     //     VM thread changes sync state to synchronizing and suspends threads for GC.
     //     Thread A is resumed to finish this native method, but doesn't block here since it
     //     didn't see any synchronization is progress, and escapes.
     __ set(_thread_in_native_trans, G3_scratch);
     __ st(G3_scratch, thread_state);
-    if (os::is_MP()) {
+
       if (UseMembar) {
         // Force this write out before the read below
         __ membar(Assembler::StoreLoad);
       } 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(G2_thread, G1_scratch, G3_scratch);
       }
-    }
 
     Label L;
     __ safepoint_poll(L, false, G2_thread, G3_scratch);
     __ delayed()->ld(G2_thread, JavaThread::suspend_flags_offset(), G3_scratch);
     __ cmp_and_br_short(G3_scratch, 0, Assembler::equal, Assembler::pt, no_block);