+/* MEMORY BARRIERS */
+
+#define smp_rmb() do {} while(0)
+#define smp_wmb() do {} while(0)
+#define smp_mb() do {} while(0)
+#define smp_mb__after_atomic_inc() do {} while(0)
+
+#define read_barrier_depends() do {} while(0)
+#define smp_read_barrier_depends() do {} while(0)