Index: openmp/trunk/libomptarget/deviceRTLs/nvptx/src/sync.cu
===================================================================
--- openmp/trunk/libomptarget/deviceRTLs/nvptx/src/sync.cu
+++ openmp/trunk/libomptarget/deviceRTLs/nvptx/src/sync.cu
@@ -132,7 +132,7 @@
 
 EXTERN void __kmpc_flush(kmp_Ident *loc) {
   PRINT0(LD_IO, "call kmpc_flush\n");
-  __threadfence_block();
+  __threadfence_system();
 }
 
 ////////////////////////////////////////////////////////////////////////////////