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-rw-r--r--include/trace/events/rcu.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
index d3e756539d44..9d4f9b3a2b7b 100644
--- a/include/trace/events/rcu.h
+++ b/include/trace/events/rcu.h
@@ -698,7 +698,10 @@ TRACE_EVENT(rcu_batch_end,
/*
* Tracepoint for rcutorture readers. The first argument is the name
* of the RCU flavor from rcutorture's viewpoint and the second argument
- * is the callback address.
+ * is the callback address. The third argument is the start time in
+ * seconds, and the last two arguments are the grace period numbers
+ * at the beginning and end of the read, respectively. Note that the
+ * callback address can be NULL.
*/
TRACE_EVENT(rcu_torture_read,