From 0a8eaa81df10983e6363814fce4cae5a0cb8bcf4 Mon Sep 17 00:00:00 2001
From: Johan Wikman <johan.wikman@mariadb.com>
Date: Mon, 27 Feb 2017 13:32:28 +0200
Subject: [PATCH] Add volatile to spinlock variables

Otherwise the loop inside spinlock_acquire will turn into an
eternal loop when optimizations have been turned on.
---
 include/maxscale/spinlock.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/maxscale/spinlock.h b/include/maxscale/spinlock.h
index 4c08ec108..c0d46356b 100644
--- a/include/maxscale/spinlock.h
+++ b/include/maxscale/spinlock.h
@@ -42,7 +42,7 @@ MXS_BEGIN_DECLS
  */
 typedef struct spinlock
 {
-    int lock;         /*< Is the lock held? */
+    volatile int lock;/*< Is the lock held? */
 #if SPINLOCK_PROFILE
     int spins;        /*< Number of spins on this lock */
     int maxspins;     /*< Max no of spins to acquire lock */