diff --git i/Documentation/conf.py w/Documentation/conf.py
index a8fe845832bc..2dae2e830c26 100644
--- i/Documentation/conf.py
+++ w/Documentation/conf.py
@@ -36,8 +36,8 @@ needs_sphinx = '1.3'
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['kerneldoc', 'rstFlatTable', 'kernel_include', 'cdomain',
-              'kfigure', 'sphinx.ext.ifconfig', 'automarkup']
+extensions = ['kerneldoc', 'rstFlatTable', 'kernel_include',
+              'kfigure', 'sphinx.ext.ifconfig']
 
 # The name of the math extension changed on Sphinx 1.4
 if (major == 1 and minor > 3) or (major > 1):
