docs: deprecate kernel-doc-nano-HOWTO.txt
Now that the new Sphinx world order is taking over, the information in
kernel-doc-nano-HOWTO.txt is outmoded. I hate to remove it altogether,
since it's one of those files that people expect to find. But we can add a
warning and fix all the other pointers to it.
Reminded-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/kernel-doc-nano-HOWTO.txt b/Documentation/kernel-doc-nano-HOWTO.txt
index 78f69cd..062e3af 100644
--- a/Documentation/kernel-doc-nano-HOWTO.txt
+++ b/Documentation/kernel-doc-nano-HOWTO.txt
@@ -1,3 +1,6 @@
+NOTE: this document is outdated and will eventually be removed. See
+Documentation/kernel-documentation.rst for current information.
+
kernel-doc nano-HOWTO
=====================