From 85b68a42af541bc91f2851389ac09b012a6d3aa1 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Sat, 25 May 2019 12:59:01 -0400
Subject: [PATCH] [atomic] Fix warnings

https://bugzilla.mozilla.org/show_bug.cgi?id=1554306
---
 src/hb-atomic.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-atomic.hh b/src/hb-atomic.hh
index a82ce6cf3..e58ec7570 100644
--- a/src/hb-atomic.hh
+++ b/src/hb-atomic.hh
@@ -216,7 +216,7 @@ static_assert ((sizeof (long) == sizeof (void *)), "");
 
 #define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */
 
-#define _hb_memory_barrier()
+#define _hb_memory_barrier()			do {} while (0)
 
 #define hb_atomic_int_impl_add(AI, V)		((*(AI) += (V)) - (V))