As discussed at linux-doc ML, the best is to keep all documents
backward compatible with Sphinx version 1.2, as it is the latest
version found on some distros like Debian.

All books currently support it.

Please notice that, while it mentions the eventual need of
XeLaTex and texlive to build pdf files, this is not a minimal
requirement, as one could just be interested on building html
documents. Also, identifying the minimal requirements for
texlive packages is not trivial, as each distribution seems to
use different criteria on grouping LaTex functionalities.

While here, update the current kernel version to 4.x.

Signed-off-by: Mauro Carvalho Chehab <>
 Documentation/Changes | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/Documentation/Changes b/Documentation/Changes
index a9f365d864c7..93c8e1c15844 100644
--- a/Documentation/Changes
+++ b/Documentation/Changes
@@ -5,7 +5,7 @@ Intro
 This document is designed to provide a list of the minimum levels of
-software necessary to run the 3.0 kernels.
+software necessary to run the 4.x kernels.
 This document is originally based on my "Changes" file for 2.0.x kernels
 and therefore owes credit to the same people as that file (Jared Mauch,
@@ -51,8 +51,10 @@ mcelog                 0.6              mcelog --version
 iptables               1.4.2            iptables -V
 openssl & libcrypto    1.0.0            openssl version
 bc                     1.06.95          bc --version
+Sphinx\ [#f1]_        1.2              sphinx-build --version
 ====================== ===============  
+.. [#f1] Sphinx is needed only to build the Kernel documentation
 Kernel compilation
@@ -307,6 +309,30 @@ On x86 kernels the mcelog utility is needed to process and 
log machine check
 events when ``CONFIG_X86_MCE`` is enabled. Machine check events are errors
 reported by the CPU. Processing them is strongly encouraged.
+Kernel documentation
+The ReST markups currently used by the Documentation/ files are meant to be
+built with ``Sphinx`` version 1.2 or upper. If you're desiring to build
+PDF outputs, it is recommended to use version 1.4.6.
+.. note::
+  Please notice that, for PDF and LaTeX output, you'll also need ``XeLaTeX``
+  version 3.14159265. Depending on the distribution, you may also need
+  to install a series of ``texlive`` packages that provide the minimal
+  set of functionalities required for ``XeLaTex`` to work.
+Other tools
+In order to produce documentation from DocBook, you'll also need ``xmlto``.
+Please notice, however, that we're currently migrating all documents to use
 Getting updated software
@@ -453,3 +479,11 @@ NFS-Utils
 - <>
+Kernel documentation
+- <>

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