docs: update old references for DocBook from the documentation

DocBook is mentioned several times at the documentation. Update
the obsolete references from it at the DocBook.

Acked-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

3 files changed, 6 insertions, 62 deletions

diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst
index e25d63f8c0da..3aed751e0cb5 100644
--- a/Documentation/process/changes.rst
+++ b/Documentation/process/changes.rst
@@ -116,12 +116,11 @@ DevFS has been obsoleted in favour of udev
 
 Linux documentation for functions is transitioning to inline
 documentation via specially-formatted comments near their
-definitions in the source.  These comments can be combined with the
-SGML templates in the Documentation/DocBook directory to make DocBook
-files, which can then be converted by DocBook stylesheets to PostScript,
-HTML, PDF files, and several other formats.  In order to convert from
-DocBook format to a format of your choice, you'll need to install Jade as
-well as the desired DocBook stylesheets.
+definitions in the source.  These comments can be combined with ReST
+files the Documentation/ directory to make enriched documentation, which can
+then be converted to PostScript, HTML, LaTex, ePUB and PDF files.
+In order to convert from ReST format to a format of your choice, you'll need
+Sphinx.
 
 Util-linux
 ----------
@@ -323,12 +322,6 @@ PDF outputs, it is recommended to use version 1.4.6.
   functionalities required for ``XeLaTex`` to work. For PDF output you'll also
   need ``convert(1)`` from ImageMagick (https://www.imagemagick.org).
 
-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
-``Sphinx``.
 
 Getting updated software
 ========================
@@ -409,15 +402,6 @@ Quota-tools
 
 - <http://sourceforge.net/projects/linuxquota/>
 
-DocBook Stylesheets
--------------------
-
-- <http://sourceforge.net/projects/docbook/files/docbook-dsssl/>
-
-XMLTO XSLT Frontend
--------------------
-
-- <http://cyberelk.net/tim/xmlto/>
 
 Intel P6 microcode
 ------------------
diff --git a/Documentation/process/howto.rst b/Documentation/process/howto.rst
index 1260f60d4cb9..c6875b1db56f 100644
--- a/Documentation/process/howto.rst
+++ b/Documentation/process/howto.rst
@@ -180,14 +180,6 @@ They can also be generated on LaTeX and ePub formats with::
 	make latexdocs
 	make epubdocs
 
-Currently, there are some documents written on DocBook that are in
-the process of conversion to ReST. Such documents will be created in the
-Documentation/DocBook/ directory and can be generated also as
-Postscript or man pages by running::
-
-	make psdocs
-	make mandocs
-
 Becoming A Kernel Developer
 ---------------------------
 
diff --git a/Documentation/process/kernel-docs.rst b/Documentation/process/kernel-docs.rst
index 05a7857a4a83..b8cac85a4001 100644
--- a/Documentation/process/kernel-docs.rst
+++ b/Documentation/process/kernel-docs.rst
@@ -40,50 +40,18 @@ Enjoy!
 Docs at the Linux Kernel tree
 -----------------------------
 
-The DocBook books should be built with ``make {htmldocs | psdocs | pdfdocs}``.
 The Sphinx books should be built with ``make {htmldocs | pdfdocs | epubdocs}``.
 
     * Name: **linux/Documentation**
 
       :Author: Many.
       :Location: Documentation/
-      :Keywords: text files, Sphinx, DocBook.
+      :Keywords: text files, Sphinx.
       :Description: Documentation that comes with the kernel sources,
         inside the Documentation directory. Some pages from this document
         (including this document itself) have been moved there, and might
         be more up to date than the web version.
 
-    * Title: **The Kernel Hacking HOWTO**
-
-      :Author: Various Talented People, and Rusty.
-      :Location: Documentation/DocBook/kernel-hacking.tmpl
-      :Keywords: HOWTO, kernel contexts, deadlock, locking, modules,
-        symbols, return conventions.
-      :Description: From the Introduction: "Please understand that I
-        never wanted to write this document, being grossly underqualified,
-        but I always wanted to read it, and this was the only way. I
-        simply explain some best practices, and give reading entry-points
-        into the kernel sources. I avoid implementation details: that's
-        what the code is for, and I ignore whole tracts of useful
-        routines. This document assumes familiarity with C, and an
-        understanding of what the kernel is, and how it is used. It was
-        originally written for the 2.3 kernels, but nearly all of it
-        applies to 2.2 too; 2.0 is slightly different".
-
-    * Title: **Linux Kernel Locking HOWTO**
-
-      :Author: Various Talented People, and Rusty.
-      :Location: Documentation/DocBook/kernel-locking.tmpl
-      :Keywords: locks, locking, spinlock, semaphore, atomic, race
-        condition, bottom halves, tasklets, softirqs.
-      :Description: The title says it all: document describing the
-        locking system in the Linux Kernel either in uniprocessor or SMP
-        systems.
-      :Notes: "It was originally written for the later (>2.3.47) 2.3
-        kernels, but most of it applies to 2.2 too; 2.0 is slightly
-        different". Freely redistributable under the conditions of the GNU
-        General Public License.
-
 On-line docs
 ------------