--- /dev/null
+#if defined(__i386__) || defined(__x86_64__)
+#define barrier() asm volatile("" ::: "memory")
+#define mb() __sync_synchronize()
+
+#define smp_mb() mb()
+# define smp_rmb() barrier()
+# define smp_wmb() barrier()
+/* Weak barriers should be used. If not - it's a bug */
+# define rmb() abort()
+# define wmb() abort()
+#else
+#error Please fill in barrier macros
+#endif
+