[PATCH] docs: fix reference to core-api/namespaces.rst

[Jonathan Corbet]

Fix a couple of dangling links to core-api/namespaces.rst by turning them
into proper references.  Enable the autosection extension (available since
Sphinx 1.4) to make this work.

Co-developed-by: Federico Vaga <federico.vaga@xxxxxxxxxx>
Fixes: fcfacb9f8374 ("doc: move namespaces.rst from kbuild/ to core-api/")
Signed-off-by: Jonathan Corbet <corbet@xxxxxxx>
---
 Documentation/conf.py                    | 2 +-
 Documentation/kernel-hacking/hacking.rst | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/conf.py b/Documentation/conf.py
index 3c7bdf4cd31f..fa2bfcd6df1d 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -38,7 +38,7 @@ needs_sphinx = '1.3'
 # ones.
 extensions = ['kerneldoc', 'rstFlatTable', 'kernel_include', 'cdomain',
               'kfigure', 'sphinx.ext.ifconfig', 'automarkup',
-              'maintainers_include']
+              'maintainers_include', 'sphinx.ext.autosectionlabel' ]
 
 # The name of the math extension changed on Sphinx 1.4
 if (major == 1 and minor > 3) or (major > 1):
diff --git a/Documentation/kernel-hacking/hacking.rst b/Documentation/kernel-hacking/hacking.rst
index a3ddb213a5e1..d707a0a61cc9 100644
--- a/Documentation/kernel-hacking/hacking.rst
+++ b/Documentation/kernel-hacking/hacking.rst
@@ -601,7 +601,7 @@ Defined in ``include/linux/export.h``
 
 This is the variant of `EXPORT_SYMBOL()` that allows specifying a symbol
 namespace. Symbol Namespaces are documented in
-``Documentation/kbuild/namespaces.rst``.
+:ref:`Documentation/core-api/symbol-namespaces.rst <Symbol Namespaces>`
 
 :c:func:`EXPORT_SYMBOL_NS_GPL()`
 --------------------------------
@@ -610,7 +610,7 @@ Defined in ``include/linux/export.h``
 
 This is the variant of `EXPORT_SYMBOL_GPL()` that allows specifying a symbol
 namespace. Symbol Namespaces are documented in
-``Documentation/kbuild/namespaces.rst``.
+:ref:`Documentation/core-api/symbol-namespaces.rst <Symbol Namespaces>`
 
 Routines and Conventions
 ========================
-- 
2.21.0