no need for locks in system mode

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@433 c046a42c-6fe2-441c-8c8c-71466251a162

exec-all.h

@@ -384,7 +384,7 @@ typedef int spinlock_t;
 
 #define SPIN_LOCK_UNLOCKED 0
 
-#if 1
+#if defined(CONFIG_USER_ONLY)
 static inline void spin_lock(spinlock_t *lock)
 {
     while (testandset(lock));