Signed-off-by: Pingfan Liu <kernelfans@xxxxxxxxx>
Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxx>
Cc: Frederic Weisbecker <frederic@xxxxxxxxxx>,
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: "Zhang, Qiang1" <qiang1.zhang@xxxxxxxxx>
To: rcu@xxxxxxxxxxxxxxx
---
include/linux/srcutree.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/srcutree.h b/include/linux/srcutree.h
index d4b7f3daf2f8..ee4f3ffa1cce 100644
--- a/include/linux/srcutree.h
+++ b/include/linux/srcutree.h
@@ -94,8 +94,16 @@ struct srcu_struct {
/* Values for size state variable (->srcu_size_state). */
#define SRCU_SIZE_SMALL 0
#define SRCU_SIZE_ALLOC 1
+/* snp tree has been initialized */
#define SRCU_SIZE_WAIT_BARRIER 2
+/* In this state, any srcu_barrier(), which considers the system not using snp
+ * tree, has finished.
+ */
#define SRCU_SIZE_WAIT_CALL 3
+/*
+ * Before snp tree is used, there can be two GPs , each takes two seq snap values.
+ * Wait until CBS1 - CBS4 elapse so these callbacks finishes.
+ */
#define SRCU_SIZE_WAIT_CBS1 4
#define SRCU_SIZE_WAIT_CBS2 5
#define SRCU_SIZE_WAIT_CBS3 6
--
2.31.1
