Merge branch 'doc/4.9' into docs-next

9 files changed, 178 insertions, 20 deletions

diff --git a/Documentation/DocBook/Makefile b/Documentation/DocBook/Makefile
index a91c96522379..a558dfcc9e2d 100644
--- a/Documentation/DocBook/Makefile
+++ b/Documentation/DocBook/Makefile
@@ -72,6 +72,7 @@ installmandocs: mandocs
 
 # no-op for the DocBook toolchain
 epubdocs:
+latexdocs:
 
 ###
 #External programs used
diff --git a/Documentation/Makefile.sphinx b/Documentation/Makefile.sphinx
index ba4efb1f68f3..894cfaa41f55 100644
--- a/Documentation/Makefile.sphinx
+++ b/Documentation/Makefile.sphinx
@@ -66,12 +66,16 @@ quiet_cmd_sphinx = SPHINX  $@ --> file://$(abspath $(BUILDDIR)/$3/$4);
 htmldocs:
 	@$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,html,$(var),,$(var)))
 
-pdfdocs:
+latexdocs:
 ifeq ($(HAVE_PDFLATEX),0)
 	$(warning The 'xelatex' command was not found. Make sure you have it installed and in PATH to produce PDF output.)
 	@echo "  SKIP    Sphinx $@ target."
 else # HAVE_PDFLATEX
 	@$(call loop_cmd,sphinx,latex,.,latex,.)
+endif # HAVE_PDFLATEX
+
+pdfdocs: latexdocs
+ifneq ($(HAVE_PDFLATEX),0)
 	$(Q)$(MAKE) PDFLATEX=xelatex LATEXOPTS="-interaction=nonstopmode" -C $(BUILDDIR)/latex
 endif # HAVE_PDFLATEX
 
@@ -95,6 +99,7 @@ endif # HAVE_SPHINX
 dochelp:
 	@echo  ' Linux kernel internal documentation in different formats (Sphinx):'
 	@echo  '  htmldocs        - HTML'
+	@echo  '  latexdocs       - LaTeX'
 	@echo  '  pdfdocs         - PDF'
 	@echo  '  epubdocs        - EPUB'
 	@echo  '  xmldocs         - XML'
diff --git a/Documentation/conf.py b/Documentation/conf.py
index 39b9c4a26f6e..46e69dba0e3c 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -34,7 +34,7 @@ from load_config import loadConfig
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['kernel-doc', 'rstFlatTable', 'kernel_include']
+extensions = ['kernel-doc', 'rstFlatTable', 'kernel_include', 'cdomain']
 
 # The name of the math extension changed on Sphinx 1.4
 if minor > 3:
@@ -277,26 +277,46 @@ latex_elements = {
         % Allow generate some pages in landscape
         \\usepackage{lscape}
 
-        % Put notes in gray color and let them be inside a table
-
-        \\definecolor{MyGray}{rgb}{0.80,0.80,0.80}
-
-        \\makeatletter\\newenvironment{graybox}{%
-           \\begin{lrbox}{\\@tempboxa}\\begin{minipage}{\\columnwidth}}{\\end{minipage}\\end{lrbox}%
-           \\colorbox{MyGray}{\\usebox{\\@tempboxa}}
+        % Put notes in color and let them be inside a table
+	\\definecolor{NoteColor}{RGB}{204,255,255}
+	\\definecolor{WarningColor}{RGB}{255,204,204}
+	\\definecolor{AttentionColor}{RGB}{255,255,204}
+	\\definecolor{OtherColor}{RGB}{204,204,204}
+        \\newlength{\\mynoticelength}
+        \\makeatletter\\newenvironment{coloredbox}[1]{%
+	   \\setlength{\\fboxrule}{1pt}
+	   \\setlength{\\fboxsep}{7pt}
+	   \\setlength{\\mynoticelength}{\\linewidth}
+	   \\addtolength{\\mynoticelength}{-2\\fboxsep}
+	   \\addtolength{\\mynoticelength}{-2\\fboxrule}
+           \\begin{lrbox}{\\@tempboxa}\\begin{minipage}{\\mynoticelength}}{\\end{minipage}\\end{lrbox}%
+	   \\ifthenelse%
+	      {\\equal{\\py@noticetype}{note}}%
+	      {\\colorbox{NoteColor}{\\usebox{\\@tempboxa}}}%
+	      {%
+	         \\ifthenelse%
+	         {\\equal{\\py@noticetype}{warning}}%
+	         {\\colorbox{WarningColor}{\\usebox{\\@tempboxa}}}%
+		 {%
+	            \\ifthenelse%
+	            {\\equal{\\py@noticetype}{attention}}%
+	            {\\colorbox{AttentionColor}{\\usebox{\\@tempboxa}}}%
+	            {\\colorbox{OtherColor}{\\usebox{\\@tempboxa}}}%
+		 }%
+	      }%
         }\\makeatother
 
         \\makeatletter
-        \\renewenvironment{notice}[2]{
-          \\begin{graybox}
-          \\bf\\it
+        \\renewenvironment{notice}[2]{%
           \\def\\py@noticetype{#1}
+          \\begin{coloredbox}{#1}
+          \\bf\\it
           \\par\\strong{#2}
           \\csname py@noticestart@#1\\endcsname
         }
 	{
           \\csname py@noticeend@\\py@noticetype\\endcsname
-          \\end{graybox}
+          \\end{coloredbox}
         }
 	\\makeatother
 
@@ -306,6 +326,9 @@ latex_elements = {
         \\setromanfont{DejaVu Sans}
         \\setmonofont{DejaVu Sans Mono}
 
+	% To allow adjusting table sizes
+	\\usepackage{adjustbox}
+
      '''
 }
 
diff --git a/Documentation/kernel-documentation.rst b/Documentation/kernel-documentation.rst
index 391decc66a18..a0dcae15639b 100644
--- a/Documentation/kernel-documentation.rst
+++ b/Documentation/kernel-documentation.rst
@@ -107,6 +107,35 @@ Here are some specific guidelines for the kernel documentation:
   the order as encountered."), having the higher levels the same overall makes
   it easier to follow the documents.
 
+
+the C domain
+------------
+
+The `Sphinx C Domain`_ (name c) is suited for documentation of C API. E.g. a
+function prototype:
+
+.. code-block:: rst
+
+    .. c:function:: int ioctl( int fd, int request )
+
+The C domain of the kernel-doc has some additional features. E.g. you can
+*rename* the reference name of a function with a common name like ``open`` or
+``ioctl``:
+
+.. code-block:: rst
+
+     .. c:function:: int ioctl( int fd, int request )
+        :name: VIDIOC_LOG_STATUS
+
+The func-name (e.g. ioctl) remains in the output but the ref-name changed from
+``ioctl`` to ``VIDIOC_LOG_STATUS``. The index entry for this function is also
+changed to ``VIDIOC_LOG_STATUS`` and the function can now referenced by:
+
+.. code-block:: rst
+
+     :c:func:`VIDIOC_LOG_STATUS`
+
+
 list tables
 -----------
 
diff --git a/Documentation/media/uapi/cec/cec-func-open.rst b/Documentation/media/uapi/cec/cec-func-open.rst
index 38fd7e0cfccd..7c0f981a6e07 100644
--- a/Documentation/media/uapi/cec/cec-func-open.rst
+++ b/Documentation/media/uapi/cec/cec-func-open.rst
@@ -32,7 +32,7 @@ Arguments
     Open flags. Access mode must be ``O_RDWR``.
 
     When the ``O_NONBLOCK`` flag is given, the
-    :ref:`CEC_RECEIVE <CEC_RECEIVE>` and :ref:`CEC_DQEVENT <CEC_DQEVENT>` ioctls
+    :ref:`CEC_RECEIVE <CEC_RECEIVE>` and :c:func:`CEC_DQEVENT` ioctls
     will return the ``EAGAIN`` error code when no message or event is available, and
     ioctls :ref:`CEC_TRANSMIT <CEC_TRANSMIT>`,
     :ref:`CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` and
diff --git a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst
index 7a6d6d00ce19..4e12e6cd88ee 100644
--- a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst
+++ b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst
@@ -15,7 +15,8 @@ CEC_DQEVENT - Dequeue a CEC event
 Synopsis
 ========
 
-.. cpp:function:: int ioctl( int fd, int request, struct cec_event *argp )
+.. c:function:: int ioctl( int fd, int request, struct cec_event *argp )
+   :name: CEC_DQEVENT
 
 Arguments
 =========
@@ -36,7 +37,7 @@ Description
    and is currently only available as a staging kernel module.
 
 CEC devices can send asynchronous events. These can be retrieved by
-calling :ref:`ioctl CEC_DQEVENT <CEC_DQEVENT>`. If the file descriptor is in
+calling :c:func:`CEC_DQEVENT`. If the file descriptor is in
 non-blocking mode and no event is pending, then it will return -1 and
 set errno to the ``EAGAIN`` error code.
 
diff --git a/Documentation/sphinx/cdomain.py b/Documentation/sphinx/cdomain.py
new file mode 100644
index 000000000000..9eb714ada394
--- /dev/null
+++ b/Documentation/sphinx/cdomain.py
@@ -0,0 +1,102 @@
+# -*- coding: utf-8; mode: python -*-
+u"""
+    cdomain
+    ~~~~~~~
+
+    Replacement for the sphinx c-domain.
+
+    :copyright:  Copyright (C) 2016  Markus Heiser
+    :license:    GPL Version 2, June 1991 see Linux/COPYING for details.
+
+    List of customizations:
+
+    * Moved the *duplicate C object description* warnings for function
+      declarations in the nitpicky mode. See Sphinx documentation for
+      the config values for ``nitpick`` and ``nitpick_ignore``.
+
+    * Add option 'name' to the "c:function:" directive.  With option 'name' the
+      ref-name of a function can be modified. E.g.::
+
+          .. c:function:: int ioctl( int fd, int request )
+             :name: VIDIOC_LOG_STATUS
+
+      The func-name (e.g. ioctl) remains in the output but the ref-name changed
+      from 'ioctl' to 'VIDIOC_LOG_STATUS'. The function is referenced by::
+
+          * :c:func:`VIDIOC_LOG_STATUS` or
+          * :any:`VIDIOC_LOG_STATUS` (``:any:`` needs sphinx 1.3)
+"""
+
+from docutils.parsers.rst import directives
+
+from sphinx.domains.c import CObject as Base_CObject
+from sphinx.domains.c import CDomain as Base_CDomain
+
+__version__  = '1.0'
+
+def setup(app):
+
+    app.override_domain(CDomain)
+
+    return dict(
+        version = __version__,
+        parallel_read_safe = True,
+        parallel_write_safe = True
+    )
+
+class CObject(Base_CObject):
+
+    """
+    Description of a C language object.
+    """
+    option_spec = {
+        "name" : directives.unchanged
+    }
+
+    def handle_signature(self, sig, signode):
+        """Transform a C signature into RST nodes."""
+        fullname = super(CObject, self).handle_signature(sig, signode)
+        if "name" in self.options:
+            if self.objtype == 'function':
+                fullname = self.options["name"]
+            else:
+                # FIXME: handle :name: value of other declaration types?
+                pass
+        return fullname
+
+    def add_target_and_index(self, name, sig, signode):
+        # for C API items we add a prefix since names are usually not qualified
+        # by a module name and so easily clash with e.g. section titles
+        targetname = 'c.' + name
+        if targetname not in self.state.document.ids:
+            signode['names'].append(targetname)
+            signode['ids'].append(targetname)
+            signode['first'] = (not self.names)
+            self.state.document.note_explicit_target(signode)
+            inv = self.env.domaindata['c']['objects']
+            if (name in inv and self.env.config.nitpicky):
+                if self.objtype == 'function':
+                    if ('c:func', name) not in self.env.config.nitpick_ignore:
+                        self.state_machine.reporter.warning(
+                            'duplicate C object description of %s, ' % name +
+                            'other instance in ' + self.env.doc2path(inv[name][0]),
+                            line=self.lineno)
+            inv[name] = (self.env.docname, self.objtype)
+
+        indextext = self.get_index_text(name)
+        if indextext:
+            self.indexnode['entries'].append(('single', indextext,
+                                              targetname, '', None))
+
+class CDomain(Base_CDomain):
+
+    """C language domain."""
+    name = 'c'
+    label = 'C'
+    directives = {
+        'function': CObject,
+        'member':   CObject,
+        'macro':    CObject,
+        'type':     CObject,
+        'var':      CObject,
+    }
diff --git a/Makefile b/Makefile
index 70de1448c571..0fa3feb6f74e 100644
--- a/Makefile
+++ b/Makefile
@@ -1432,7 +1432,7 @@ $(help-board-dirs): help-%:
 
 # Documentation targets
 # ---------------------------------------------------------------------------
-DOC_TARGETS := xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs
+DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs
 PHONY += $(DOC_TARGETS)
 $(DOC_TARGETS): scripts_basic FORCE
 	$(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 4f2e9049e8fa..ba081c7636a2 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1849,9 +1849,6 @@ sub output_function_rst(%) {
 	$count++;
 	$type = $args{'parametertypes'}{$parameter};
 
-	# RST doesn't like address_space tags at function prototypes
-	$type =~ s/__(user|kernel|iomem|percpu|pmem|rcu)\s*//;
-
 	if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
 	    # pointer-to-function
 	    print $1 . $parameter . ") (" . $2;