Merge tag 'docs-for-linus' of git://git.lwn.net/linux

Pull documentation update from Jon Corbet:
 "There is a nice new document from Neil on how pathname lookups work
  and some new CAN driver documentation.  Beyond that, we have
  kernel-doc fixes, a bit more work to support reproducible builds, and
  the usual collection of small fixes"

* tag 'docs-for-linus' of git://git.lwn.net/linux: (34 commits)
  Documentation: add new description of path-name lookup.
  Documentation/vm/slub.txt: document slabinfo-gnuplot.sh
  Doc: ABI/stable: Fix typo in ABI/stable
  doc: Clarify that nmi_watchdog param is for hardlockups
  Typo correction for description in gpio document.
  DocBook: Fix kernel-doc to be case-insensitive for private:
  kernel-docs.txt: update kernelnewbies reference
  Doc:kvm: Fix typo in Doc/virtual/kvm
  Documentation/Changes: Add bc in "Current Minimal Requirements" section
  Documentation/email-clients.txt: remove trailing whitespace
  DocBook: Use a fixed encoding for output
  MAINTAINERS: The docs tree has moved
  Docs/kernel-parameters: Add earlycon devicetree usage
  SubmittingPatches: make Subject examples match the de facto standard
  Documentation: gpio: mention that <function>-gpio has been deprecated
  Documentation: cgroups: just fix a few typos
  Documentation: Update kselftest.txt
  Documentation: DMA API: Be more explicit that nents is always the same
  Documentation: Update the default value of crashkernel low
  zram: update documentation
  ...

4 files changed, 85 insertions, 53 deletions

diff --git a/scripts/.gitignore b/scripts/.gitignore
index 12efbbefd4d7..1f78169d4254 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -8,6 +8,7 @@ unifdef
 ihex2fw
 recordmcount
 docproc
+check-lc_ctype
 sortextable
 asn1_compiler
 extract-cert
diff --git a/scripts/Makefile b/scripts/Makefile
index 1b2661712d44..fd0d53d4a234 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -7,6 +7,7 @@
 # conmakehash:   Create chartable
 # conmakehash:	 Create arrays for initializing the kernel console tables
 # docproc:       Used in Documentation/DocBook
+# check-lc_ctype: Used in Documentation/DocBook
 
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
 
@@ -27,14 +28,16 @@ HOSTLOADLIBES_extract-cert = -lcrypto
 always		:= $(hostprogs-y) $(hostprogs-m)
 
 # The following hostprogs-y programs are only build on demand
-hostprogs-y += unifdef docproc
+hostprogs-y += unifdef docproc check-lc_ctype
 
 # These targets are used internally to avoid "is up to date" messages
-PHONY += build_unifdef build_docproc
+PHONY += build_unifdef build_docproc build_check-lc_ctype
 build_unifdef: $(obj)/unifdef
 	@:
 build_docproc: $(obj)/docproc
 	@:
+build_check-lc_ctype: $(obj)/check-lc_ctype
+	@:
 
 subdir-$(CONFIG_MODVERSIONS) += genksyms
 subdir-y                     += mod
diff --git a/scripts/check-lc_ctype.c b/scripts/check-lc_ctype.c
new file mode 100644
index 000000000000..9097ff5449fb
--- /dev/null
+++ b/scripts/check-lc_ctype.c
@@ -0,0 +1,11 @@
+/*
+ * Check that a specified locale works as LC_CTYPE.  Used by the
+ * DocBook build system to probe for C.UTF-8 support.
+ */
+
+#include <locale.h>
+
+int main(void)
+{
+	return !setlocale(LC_CTYPE, "");
+}
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 0276d2b5eefe..125b906cd1d4 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -206,59 +206,73 @@ my $type_env = '(\$\w+)';
 #  One for each output format
 
 # these work fairly well
-my %highlights_html = ( $type_constant, "<i>\$1</i>",
-			$type_func, "<b>\$1</b>",
-			$type_struct_xml, "<i>\$1</i>",
-			$type_env, "<b><i>\$1</i></b>",
-			$type_param, "<tt><b>\$1</b></tt>" );
+my @highlights_html = (
+                       [$type_constant, "<i>\$1</i>"],
+                       [$type_func, "<b>\$1</b>"],
+                       [$type_struct_xml, "<i>\$1</i>"],
+                       [$type_env, "<b><i>\$1</i></b>"],
+                       [$type_param, "<tt><b>\$1</b></tt>"]
+                      );
 my $local_lt = "\\\\\\\\lt:";
 my $local_gt = "\\\\\\\\gt:";
 my $blankline_html = $local_lt . "p" . $local_gt;	# was "<p>"
 
 # html version 5
-my %highlights_html5 = ( $type_constant, "<span class=\"const\">\$1</span>",
-			$type_func, "<span class=\"func\">\$1</span>",
-			$type_struct_xml, "<span class=\"struct\">\$1</span>",
-			$type_env, "<span class=\"env\">\$1</span>",
-			$type_param, "<span class=\"param\">\$1</span>" );
+my @highlights_html5 = (
+                        [$type_constant, "<span class=\"const\">\$1</span>"],
+                        [$type_func, "<span class=\"func\">\$1</span>"],
+                        [$type_struct_xml, "<span class=\"struct\">\$1</span>"],
+                        [$type_env, "<span class=\"env\">\$1</span>"],
+                        [$type_param, "<span class=\"param\">\$1</span>]"]
+		       );
 my $blankline_html5 = $local_lt . "br /" . $local_gt;
 
 # XML, docbook format
-my %highlights_xml = ( "([^=])\\\"([^\\\"<]+)\\\"", "\$1<quote>\$2</quote>",
-			$type_constant, "<constant>\$1</constant>",
-			$type_func, "<function>\$1</function>",
-			$type_struct_xml, "<structname>\$1</structname>",
-			$type_env, "<envar>\$1</envar>",
-			$type_param, "<parameter>\$1</parameter>" );
+my @highlights_xml = (
+                      ["([^=])\\\"([^\\\"<]+)\\\"", "\$1<quote>\$2</quote>"],
+                      [$type_constant, "<constant>\$1</constant>"],
+                      [$type_struct_xml, "<structname>\$1</structname>"],
+                      [$type_param, "<parameter>\$1</parameter>"],
+                      [$type_func, "<function>\$1</function>"],
+                      [$type_env, "<envar>\$1</envar>"]
+		     );
 my $blankline_xml = $local_lt . "/para" . $local_gt . $local_lt . "para" . $local_gt . "\n";
 
 # gnome, docbook format
-my %highlights_gnome = ( $type_constant, "<replaceable class=\"option\">\$1</replaceable>",
-			 $type_func, "<function>\$1</function>",
-			 $type_struct, "<structname>\$1</structname>",
-			 $type_env, "<envar>\$1</envar>",
-			 $type_param, "<parameter>\$1</parameter>" );
+my @highlights_gnome = (
+                        [$type_constant, "<replaceable class=\"option\">\$1</replaceable>"],
+                        [$type_func, "<function>\$1</function>"],
+                        [$type_struct, "<structname>\$1</structname>"],
+                        [$type_env, "<envar>\$1</envar>"],
+                        [$type_param, "<parameter>\$1</parameter>" ]
+		       );
 my $blankline_gnome = "</para><para>\n";
 
 # these are pretty rough
-my %highlights_man = ( $type_constant, "\$1",
-		       $type_func, "\\\\fB\$1\\\\fP",
-		       $type_struct, "\\\\fI\$1\\\\fP",
-		       $type_param, "\\\\fI\$1\\\\fP" );
+my @highlights_man = (
+                      [$type_constant, "\$1"],
+                      [$type_func, "\\\\fB\$1\\\\fP"],
+                      [$type_struct, "\\\\fI\$1\\\\fP"],
+                      [$type_param, "\\\\fI\$1\\\\fP"]
+		     );
 my $blankline_man = "";
 
 # text-mode
-my %highlights_text = ( $type_constant, "\$1",
-			$type_func, "\$1",
-			$type_struct, "\$1",
-			$type_param, "\$1" );
+my @highlights_text = (
+                       [$type_constant, "\$1"],
+                       [$type_func, "\$1"],
+                       [$type_struct, "\$1"],
+                       [$type_param, "\$1"]
+		      );
 my $blankline_text = "";
 
 # list mode
-my %highlights_list = ( $type_constant, "\$1",
-			$type_func, "\$1",
-			$type_struct, "\$1",
-			$type_param, "\$1" );
+my @highlights_list = (
+                       [$type_constant, "\$1"],
+                       [$type_func, "\$1"],
+                       [$type_struct, "\$1"],
+                       [$type_param, "\$1"]
+		      );
 my $blankline_list = "";
 
 # read arguments
@@ -273,7 +287,7 @@ my $verbose = 0;
 my $output_mode = "man";
 my $output_preformatted = 0;
 my $no_doc_sections = 0;
-my %highlights = %highlights_man;
+my @highlights = @highlights_man;
 my $blankline = $blankline_man;
 my $modulename = "Kernel API";
 my $function_only = 0;
@@ -374,31 +388,31 @@ while ($ARGV[0] =~ m/^-(.*)/) {
     my $cmd = shift @ARGV;
     if ($cmd eq "-html") {
 	$output_mode = "html";
-	%highlights = %highlights_html;
+	@highlights = @highlights_html;
 	$blankline = $blankline_html;
     } elsif ($cmd eq "-html5") {
 	$output_mode = "html5";
-	%highlights = %highlights_html5;
+	@highlights = @highlights_html5;
 	$blankline = $blankline_html5;
     } elsif ($cmd eq "-man") {
 	$output_mode = "man";
-	%highlights = %highlights_man;
+	@highlights = @highlights_man;
 	$blankline = $blankline_man;
     } elsif ($cmd eq "-text") {
 	$output_mode = "text";
-	%highlights = %highlights_text;
+	@highlights = @highlights_text;
 	$blankline = $blankline_text;
     } elsif ($cmd eq "-docbook") {
 	$output_mode = "xml";
-	%highlights = %highlights_xml;
+	@highlights = @highlights_xml;
 	$blankline = $blankline_xml;
     } elsif ($cmd eq "-list") {
 	$output_mode = "list";
-	%highlights = %highlights_list;
+	@highlights = @highlights_list;
 	$blankline = $blankline_list;
     } elsif ($cmd eq "-gnome") {
 	$output_mode = "gnome";
-	%highlights = %highlights_gnome;
+	@highlights = @highlights_gnome;
 	$blankline = $blankline_gnome;
     } elsif ($cmd eq "-module") { # not needed for XML, inherits from calling document
 	$modulename = shift @ARGV;
@@ -1746,7 +1760,7 @@ sub output_declaration {
     my $func = "output_${functype}_$output_mode";
     if (($function_only==0) ||
 	( $function_only == 1 && defined($function_table{$name})) ||
-	( $function_only == 2 && !defined($function_table{$name})))
+	( $function_only == 2 && !($functype eq "function" && defined($function_table{$name}))))
     {
 	&$func(@_);
 	$section_counter++;
@@ -1791,8 +1805,8 @@ sub dump_struct($$) {
 	$nested = $1;
 
 	# ignore members marked private:
-	$members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gos;
-	$members =~ s/\/\*\s*private:.*//gos;
+	$members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
+	$members =~ s/\/\*\s*private:.*//gosi;
 	# strip comments:
 	$members =~ s/\/\*.*?\*\///gos;
 	$nested =~ s/\/\*.*?\*\///gos;
@@ -2416,12 +2430,13 @@ sub process_file($) {
     my $descr;
     my $in_purpose = 0;
     my $initial_section_counter = $section_counter;
+    my ($orig_file) = @_;
 
     if (defined($ENV{'SRCTREE'})) {
-	$file = "$ENV{'SRCTREE'}" . "/" . "@_";
+	$file = "$ENV{'SRCTREE'}" . "/" . $orig_file;
     }
     else {
-	$file = "@_";
+	$file = $orig_file;
     }
     if (defined($source_map{$file})) {
 	$file = $source_map{$file};
@@ -2665,7 +2680,7 @@ sub process_file($) {
 	    print "<refentry>\n";
 	    print " <refnamediv>\n";
 	    print "  <refname>\n";
-	    print "   ${file}\n";
+	    print "   ${orig_file}\n";
 	    print "  </refname>\n";
 	    print "  <refpurpose>\n";
 	    print "   Document generation inconsistency\n";
@@ -2679,7 +2694,7 @@ sub process_file($) {
 	    print "   <para>\n";
 	    print "    The template for this document tried to insert\n";
 	    print "    the structured comment from the file\n";
-	    print "    <filename>${file}</filename> at this point,\n";
+	    print "    <filename>${orig_file}</filename> at this point,\n";
 	    print "    but none was found.\n";
 	    print "    This dummy section is inserted to allow\n";
 	    print "    generation to continue.\n";
@@ -2696,9 +2711,11 @@ $kernelversion = get_kernel_version();
 
 # generate a sequence of code that will splice in highlighting information
 # using the s// operator.
-foreach my $pattern (sort keys %highlights) {
-#   print STDERR "scanning pattern:$pattern, highlight:($highlights{$pattern})\n";
-    $dohighlight .=  "\$contents =~ s:$pattern:$highlights{$pattern}:gs;\n";
+foreach my $k (keys @highlights) {
+    my $pattern = $highlights[$k][0];
+    my $result = $highlights[$k][1];
+#   print STDERR "scanning pattern:$pattern, highlight:($result)\n";
+    $dohighlight .=  "\$contents =~ s:$pattern:$result:gs;\n";
 }
 
 # Read the file that maps relative names to absolute names for