From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Date: Sat, 9 May 2009 14:48:38 +0000 (-0400)
Subject: Add ACCESS_ONCE to _STORE_SHARED
X-Git-Tag: v0.1~245
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=ad7de003b45b3a7339b90208c321517c2dcbdc3e;p=urcu.git

Add ACCESS_ONCE to _STORE_SHARED

We assume that the compiler does not reorder _STORE_SHARED across each other
and wrt _READ_SHARED. We therefore need to mark this access as volatile. The
compiler cannot reorder volatile accesses.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
---

diff --git a/urcu.h b/urcu.h
index 819555e..b43b280 100644
--- a/urcu.h
+++ b/urcu.h
@@ -87,7 +87,7 @@
  */
 #define _STORE_SHARED(x, v) \
 	do { \
-		(x) = (v); \
+		ACCESS_ONCE(x) = (v); \
 	} while (0)
 
 /*