[PATCH tip/core/rcu 2/3] doc: Fix diagram references in memory-ordering document

From: Paul E. McKenney
Date: Tue May 11 2021 - 18:44:43 EST


From: Frederic Weisbecker <frederic@xxxxxxxxxx>

The three diagrams describing rcu_gp_init() all spuriously refer to
the same figure, probably due to a copy/paste issue. This commit fixes
these references.

Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
.../RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst
index 3f6ce41ee0c5..11cdab037bff 100644
--- a/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst
+++ b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst
@@ -339,14 +339,14 @@ The diagram below shows the path of ordering if the leftmost
leftmost ``rcu_node`` structure offlines its last CPU and if the next
``rcu_node`` structure has no online CPUs).

-.. kernel-figure:: TreeRCU-gp-init-1.svg
+.. kernel-figure:: TreeRCU-gp-init-2.svg

The final ``rcu_gp_init()`` pass through the ``rcu_node`` tree traverses
breadth-first, setting each ``rcu_node`` structure's ``->gp_seq`` field
to the newly advanced value from the ``rcu_state`` structure, as shown
in the following diagram.

-.. kernel-figure:: TreeRCU-gp-init-1.svg
+.. kernel-figure:: TreeRCU-gp-init-3.svg

This change will also cause each CPU's next call to
``__note_gp_changes()`` to notice that a new grace period has started,
--
2.31.1.189.g2e36527f23