+/*
+ * Define the membarrier system call number if not yet available in the
+ * system headers.
+ */
+#if (CAA_BITS_PER_LONG == 32)
+#ifndef __NR_membarrier
+#define __NR_membarrier 375
+#endif
+#else
+#ifndef __NR_membarrier
+#define __NR_membarrier 324
+#endif
+#endif
+