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-rw-r--r--kernel/rcutree.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index e6ab31cc28ba..676eecd371d9 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -106,6 +106,18 @@ struct rcu_node {
/* blocked_tasks[] array. */
} ____cacheline_internodealigned_in_smp;
+/*
+ * Do a full breadth-first scan of the rcu_node structures for the
+ * specified rcu_state structure.
+ */
+#define rcu_for_each_node_breadth_first(rsp, rnp) \
+ for ((rnp) = &(rsp)->node[0]; \
+ (rnp) < &(rsp)->node[NUM_RCU_NODES]; (rnp)++)
+
+#define rcu_for_each_leaf_node(rsp, rnp) \
+ for ((rnp) = (rsp)->level[NUM_RCU_LVLS - 1]; \
+ (rnp) < &(rsp)->node[NUM_RCU_NODES]; (rnp)++)
+
/* Index values for nxttail array in struct rcu_data. */
#define RCU_DONE_TAIL 0 /* Also RCU_WAIT head. */
#define RCU_WAIT_TAIL 1 /* Also RCU_NEXT_READY head. */