From 70debf33fadd0b897995365266bc6457abd8e62b Mon Sep 17 00:00:00 2001
From: Rickard Green <rickard@erlang.org>
Date: Tue, 11 Dec 2012 16:46:48 +0100
Subject: Fix bit set op of non-atomic fallback in atomic API

---
 erts/emulator/beam/erl_threads.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'erts/emulator/beam/erl_threads.h')

diff --git a/erts/emulator/beam/erl_threads.h b/erts/emulator/beam/erl_threads.h
index 0e759a1eec..1dc3ffeb3c 100644
--- a/erts/emulator/beam/erl_threads.h
+++ b/erts/emulator/beam/erl_threads.h
@@ -2138,6 +2138,7 @@ erts_no_atomic_read_bset(erts_no_atomic_t *var,
 			 erts_aint_t set)
 {
     erts_aint_t old = *var;
+    *var &= ~mask;
     *var |= (mask & set);
     return old;
 }
@@ -2235,6 +2236,7 @@ erts_no_atomic32_read_bset(erts_no_atomic32_t *var,
 			   erts_aint32_t set)
 {
     erts_aint32_t old = *var;
+    *var &= ~mask;
     *var |= (mask & set);
     return old;
 }
-- 
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