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kernel-doc: detect/prevent duplicate doc section names 

I saw this problem recently.  With this kernel-doc:

 * Note: some important info
 *
 * Note: other important info

kernel-doc uses the "section name" (preceding the ':', like "Note") as a hash
key for storing the descriptive text ("blah important info").  It is (was)
possible to have duplicate (colliding) section names, without any kind of
warning or error.

kernel-doc happily used the latter descriptive text for all instances of
printing the <section-name> descriptive text and the former important info
was lost.

One way to "fix" this is to modify the kernel-doc comments, e.g.:

 * Note1: foo bar
 *
 * Note.2: blah zay

For now, kernel-doc will signal an error when it sees colliding section names
like this.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Randy Dunlap 2008-04-28 02:16:34 -07:00 committed by Linus Torvalds
parent 9f354858b8
commit 94dc7ad550
1 changed files with 13 additions and 7 deletions
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20
scripts/kernel-doc
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@ -5,7 +5,7 @@ use strict;
## Copyright (c) 1998 Michael Zucchi, All Rights Reserved ##
## Copyright (C) 2000, 1 Tim Waugh <twaugh@redhat.com> ##
## Copyright (C) 2001 Simon Huggins ##
## Copyright (C) 2005-2007 Randy Dunlap ##
## Copyright (C) 2005-2008 Randy Dunlap ##
## ##
## #define enhancements by Armin Kuster <akuster@mvista.com> ##
## Copyright (c) 2000 MontaVista Software, Inc. ##
@ -366,6 +366,7 @@ foreach my $pattern (keys %highlights) {
# dumps section contents to arrays/hashes intended for that purpose.
#
sub dump_section {
my $file = shift;
my $name = shift;
my $contents = join "\n", @_;
@ -379,6 +380,10 @@ sub dump_section {
$parameterdescs{$name} = $contents;
} else {
# print STDERR "other section '$name' = '$contents'\n";
if (defined($sections{$name}) && ($sections{$name} ne "")) {
print STDERR "Error(${file}:$.): duplicate section name '$name'\n";
++$errors;
}
$sections{$name} = $contents;
push @sectionlist, $name;
}
@ -388,6 +393,7 @@ sub dump_section {
# dump DOC: section after checking that it should go out
#
sub dump_doc_section {
my $file = shift;
my $name = shift;
my $contents = join "\n", @_;
@ -399,7 +405,7 @@ sub dump_doc_section {
( $function_only == 1 && defined($function_table{$name})) ||
( $function_only == 2 && !defined($function_table{$name})))
{
dump_section $name, $contents;
dump_section($file, $name, $contents);
output_blockhead({'sectionlist' => \@sectionlist,
'sections' => \%sections,
'module' => $modulename,
@ -1923,7 +1929,7 @@ sub process_file($) {
print STDERR "Warning(${file}:$.): contents before sections\n";
++$warnings;
}
dump_section($section, xml_escape($contents));
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
}
@ -1940,7 +1946,7 @@ sub process_file($) {
} elsif (/$doc_end/) {
if ($contents ne "") {
dump_section($section, xml_escape($contents));
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
}
@ -1954,7 +1960,7 @@ sub process_file($) {
# @parameter line to signify start of description
if ($1 eq "" &&
($section =~ m/^@/ || $section eq $section_context)) {
dump_section($section, xml_escape($contents));
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
} else {
@ -1974,7 +1980,7 @@ sub process_file($) {
} elsif ($state == 4) {
# Documentation block
if (/$doc_block/) {
dump_doc_section($section, xml_escape($contents));
dump_doc_section($file, $section, xml_escape($contents));
$contents = "";
$function = "";
%constants = ();
@ -1992,7 +1998,7 @@ sub process_file($) {
}
elsif (/$doc_end/)
{
dump_doc_section($section, xml_escape($contents));
dump_doc_section($file, $section, xml_escape($contents));
$contents = "";
$function = "";
%constants = ();