[PATCH] rcu: Make struct rcu_head searchable

[Steven Rostedt]

After wasting too much time trying to see where struct rcu_head was
declared, I finally found it in include/linux/types.h as a define for
callback_head!

To prevent other developers from wasting their precious time in
searching for this structure, add a comment to help them find it!

Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Steven "frustrated" Rostedt <rostedt@xxxxxxxxxxx>

diff --git a/include/linux/types.h b/include/linux/types.h
index 4d118ba..073e9a8 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -210,6 +210,9 @@ struct callback_head {
 	struct callback_head *next;
 	void (*func)(struct callback_head *head);
 };
+/*
+ * Make "struct rcu_head {" seachable with this comment.
+ */
 #define rcu_head callback_head
 
 #endif /*  __ASSEMBLY__ */
--
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