[PATCH] Documentation: kbuild: Add document about namespaces

[Adam Zerella <adam.zerella@xxxxxxxxx>]

Sphinx outputs the following build warning:

Documentation/kbuild/namespaces.rst:
WARNING: document isn't included in any toctree

Assuming this document is intended to be referenced within the
documentation it should be inside the toctree.

Signed-off-by: Adam Zerella <adam.zerella@xxxxxxxxx>
---
 Documentation/kbuild/index.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/kbuild/index.rst b/Documentation/kbuild/index.rst
index 0f144fad99a6..5dd01997c8ed 100644
--- a/Documentation/kbuild/index.rst
+++ b/Documentation/kbuild/index.rst
@@ -14,6 +14,7 @@ Kernel Build System
     kconfig
     makefiles
     modules
+    namespaces
 
     headers_install
 
-- 
2.21.0