doc-rst: add index to sub-folders
Add a index if only a sub-folder is build e.g.::
make SPHINXDIRS=media cleandocs htmldocs
BTW: removed dead search link in the top-index file
Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/gpu/conf.py b/Documentation/gpu/conf.py
index d60bcd0..6314d17 100644
--- a/Documentation/gpu/conf.py
+++ b/Documentation/gpu/conf.py
@@ -1,3 +1,5 @@
# -*- coding: utf-8; mode: python -*-
project = "Linux GPU Driver Developer's Guide"
+
+tags.add("subproject")