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Subject[PATCH 22/26] kernel-doc: check for extra kernel-doc notations
Date
From: Randy Dunlap <randy.dunlap@oracle.com>

Add functionality to check for function parameters or structure (or
union/typedef/enum) field members that are described in kernel-doc but
are not part of the expected (declared) parameters or structure.
These generate warnings that are called "Excess" descriptions.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---
scripts/kernel-doc | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 66 insertions(+), 1 deletions(-)
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index d27aad7..8bb83a1 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -289,6 +289,8 @@ my %parameterdescs;
my @parameterlist;
my %sections;
my @sectionlist;
+my $sectcheck;
+my $struct_actual;

my $contents = "";
my $section_default = "Description"; # default section
@@ -378,10 +380,12 @@ sub dump_section {
# print STDERR "parameter def '$1' = '$contents'\n";
$name = $1;
$parameterdescs{$name} = $contents;
+ $sectcheck = $sectcheck . $name . " ";
} elsif ($name eq "@\.\.\.") {
# print STDERR "parameter def '...' = '$contents'\n";
$name = "...";
$parameterdescs{$name} = $contents;
+ $sectcheck = $sectcheck . $name . " ";
} else {
# print STDERR "other section '$name' = '$contents'\n";
if (defined($sections{$name}) && ($sections{$name} ne "")) {
@@ -1405,21 +1409,25 @@ sub dump_union($$) {
sub dump_struct($$) {
my $x = shift;
my $file = shift;
+ my $nested;

if ($x =~/(struct|union)\s+(\w+)\s*{(.*)}/) {
$declaration_name = $2;
my $members = $3;

# ignore embedded structs or unions
- $members =~ s/{.*}//g;
+ $members =~ s/({.*})//g;
+ $nested = $1;

# ignore members marked private:
$members =~ s/\/\*.*?private:.*?public:.*?\*\///gos;
$members =~ s/\/\*.*?private:.*//gos;
# strip comments:
$members =~ s/\/\*.*?\*\///gos;
+ $nested =~ s/\/\*.*?\*\///gos;

create_parameterlist($members, ';', $file);
+ check_sections($file, $declaration_name, "struct", $sectcheck, $struct_actual, $nested);

output_declaration($declaration_name,
'struct',
@@ -1505,6 +1513,14 @@ sub dump_typedef($$) {
}
}

+sub save_struct_actual($) {
+ my $actual = shift;
+
+ # strip all spaces from the actual param so that it looks like one string item
+ $actual =~ s/\s*//g;
+ $struct_actual = $struct_actual . $actual . " ";
+}
+
sub create_parameterlist($$$) {
my $args = shift;
my $splitter = shift;
@@ -1537,6 +1553,7 @@ sub create_parameterlist($$$) {
$param = $1;
$type = $arg;
$type =~ s/([^\(]+\(\*?)\s*$param/$1/;
+ save_struct_actual($param);
push_parameter($param, $type, $file);
} elsif ($arg) {
$arg =~ s/\s*:\s*/:/g;
@@ -1561,14 +1578,17 @@ sub create_parameterlist($$$) {

foreach $param (@args) {
if ($param =~ m/^(\*+)\s*(.*)/) {
+ save_struct_actual($2);
push_parameter($2, "$type $1", $file);
}
elsif ($param =~ m/(.*?):(\d+)/) {
if ($type ne "") { # skip unnamed bit-fields
+ save_struct_actual($1);
push_parameter($1, "$type:$2", $file)
}
}
else {
+ save_struct_actual($param);
push_parameter($param, $type, $file);
}
}
@@ -1634,6 +1654,46 @@ sub push_parameter($$$) {
$parametertypes{$param} = $type;
}

+sub check_sections($$$$$$) {
+ my ($file, $decl_name, $decl_type, $sectcheck, $prmscheck, $nested) = @_;
+ my @sects = split ' ', $sectcheck;
+ my @prms = split ' ', $prmscheck;
+ my $err;
+ my ($px, $sx);
+ my $prm_clean; # strip trailing "[array size]" and/or beginning "*"
+
+ foreach $sx (0 .. $#sects) {
+ $err = 1;
+ foreach $px (0 .. $#prms) {
+ $prm_clean = $prms[$px];
+ $prm_clean =~ s/\[.*\]//;
+ $prm_clean =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//;
+ ##$prm_clean =~ s/^\**//;
+ if ($prm_clean eq $sects[$sx]) {
+ $err = 0;
+ last;
+ }
+ }
+ if ($err) {
+ if ($decl_type eq "function") {
+ print STDERR "Warning(${file}:$.): " .
+ "Excess function parameter " .
+ "'$sects[$sx]' " .
+ "description in '$decl_name'\n";
+ ++$warnings;
+ } else {
+ if ($nested !~ m/\Q$sects[$sx]\E/) {
+ print STDERR "Warning(${file}:$.): " .
+ "Excess struct/union/enum/typedef member " .
+ "'$sects[$sx]' " .
+ "description in '$decl_name'\n";
+ ++$warnings;
+ }
+ }
+ }
+ }
+}
+
##
# takes a function prototype and the name of the current file being
# processed and spits out all the details stored in the global
@@ -1699,6 +1759,9 @@ sub dump_function($$) {
return;
}

+ my $prms = join " ", @parameterlist;
+ check_sections($file, $declaration_name, "function", $sectcheck, $prms, "");
+
output_declaration($declaration_name,
'function',
{'function' => $declaration_name,
@@ -1757,6 +1820,8 @@ sub reset_state {
@parameterlist = ();
%sections = ();
@sectionlist = ();
+ $sectcheck = "";
+ $struct_actual = "";
$prototype = "";

$state = 0;
--
1.6.0.2.GIT


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