doc: update Kernel documentation build system

Update the documentation build system according to Linux v5.11-rc1.

Deactive the automarkup.py extension module which on Gitlab CI is
incompatible with Unicode.

With this patch we can build the HTML documentation using either of
Sphinx 2 and Sphinx 3.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/doc/sphinx/kernellog.py b/doc/sphinx/kernellog.py
index af924f51a7..8ac7d274f5 100644
--- a/doc/sphinx/kernellog.py
+++ b/doc/sphinx/kernellog.py
@@ -25,4 +25,8 @@ def verbose(app, message):
     else:
         app.verbose(message)
 
-
+def info(app, message):
+    if UseLogging:
+        logger.info(message)
+    else:
+        app.info(message)