+/*
+ * RCU memory barrier broadcast group. Currently, only broadcast to all process
+ * threads is supported (group 0).
+ *
+ * Slave barriers are only guaranteed to be ordered wrt master barriers.
+ *
+ * The pair ordering is detailed as (O: ordered, X: not ordered) :
+ * slave master
+ * slave X O
+ * master O O
+ */
+
+#define MB_GROUP_ALL 0
+#define RCU_MB_GROUP MB_GROUP_ALL
+
+#ifdef RCU_MEMBARRIER
+extern int has_sys_membarrier;
+
+static inline void smp_mb_slave(int group)
+{
+ if (likely(has_sys_membarrier))
+ cmm_barrier();
+ else
+ cmm_smp_mb();
+}
+#endif
+
+#ifdef RCU_MB
+static inline void smp_mb_slave(int group)