Merge pull request #1236 from jsquyres/pr/v2.0.0/delete-unused-opal-thread-multi-macro

bml r2: remove use of undefined macro

Author: jsquyres

ompi/mca/bml/r2/bml_r2.c

@@ -12,7 +12,7 @@
  *                         All rights reserved.
  * Copyright (c) 2007-2015 Los Alamos National Security, LLC.  All rights
  *                         reserved.
- * Copyright (c) 2008-2014 Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2008-2016 Cisco Systems, Inc.  All rights reserved.
  * Copyright (c) 2013      Intel, Inc. All rights reserved
  * Copyright (c) 2014      NVIDIA Corporation.  All rights reserved.
  * Copyright (c) 2014      Research Organization for Information Science
@@ -438,9 +438,7 @@ static int mca_bml_r2_add_proc (struct ompi_proc_t *proc)
     mca_bml_r2_compute_endpoint_metrics (bml_endpoint);
 
     /* do it last, for the lazy initialization check in bml_base_get* */
-#if OPAL_ENABLE_THREAD_MULTI
     opal_atomic_wmb();
-#endif /* OPAL_ENABLE_THREAD_MULTI */
     proc->proc_endpoints[OMPI_PROC_ENDPOINT_TAG_BML] = bml_endpoint;
 
     return OMPI_SUCCESS;