docs: rcu: Increase toctree to 3

These documents are long and have various sections. Provide a good
toc nesting level.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/Documentation/RCU/index.rst b/Documentation/RCU/index.rst
index 94427dc1f23d6b66d63360331578c562fcf76e0d..5c99185710fa4b083e144c988090aedd4fb96a7a 100644 (file)
--- a/Documentation/RCU/index.rst
+++ b/Documentation/RCU/index.rst
@@ -5,7 +5,7 @@ RCU concepts
 ============
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 3
 
    rcu
    listRCU