docs: locking: add it to the main index
The locking directory is part of the Kernel API bookset. Add
it to the index file.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
diff --git a/Documentation/index.rst b/Documentation/index.rst
index 0cd4c39..eb5db85 100644
--- a/Documentation/index.rst
+++ b/Documentation/index.rst
@@ -96,6 +96,7 @@
driver-api/index
core-api/index
+ locking/index
accounting/index
block/index
cdrom/index
diff --git a/Documentation/locking/index.rst b/Documentation/locking/index.rst
index ef5da7fe..626a463 100644
--- a/Documentation/locking/index.rst
+++ b/Documentation/locking/index.rst
@@ -1,4 +1,4 @@
-:orphan:
+.. SPDX-License-Identifier: GPL-2.0
=======
locking
