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Copy pathcheckpatch.pl
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checkpatch.pl
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#!/usr/bin/perl -w
# (c) 2001, Dave Jones. <[email protected]> (the file handling bit)
# (c) 2005, Joel Schopp <[email protected]> (the ugly bit)
# (c) 2007, Andy Whitcroft <[email protected]> (new conditions, test suite, etc)
# Licensed under the terms of the GNU GPL License version 2
use strict;
my $P = $0;
$P =~ s@.*/@@g;
my $V = '0.11';
use Getopt::Long qw(:config no_auto_abbrev);
my $quiet = 0;
my $tree = 1;
my $chk_signoff = 1;
my $chk_patch = 1;
my $tst_type = 0;
my $emacs = 0;
my $file = 0;
my $check = 0;
my $root;
GetOptions(
'q|quiet+' => \$quiet,
'tree!' => \$tree,
'signoff!' => \$chk_signoff,
'patch!' => \$chk_patch,
'test-type!' => \$tst_type,
'emacs!' => \$emacs,
'file!' => \$file,
'subjective!' => \$check,
'strict!' => \$check,
'root=s' => \$root,
) or exit;
my $exit = 0;
if ($#ARGV < 0) {
print "usage: $P [options] patchfile\n";
print "version: $V\n";
print "options: -q => quiet\n";
print " --no-tree => run without a kernel tree\n";
print " --emacs => emacs compile window format\n";
print " --file => check a source file\n";
print " --strict => enable more subjective tests\n";
print " --root => path to the kernel tree root\n";
exit(1);
}
if ($tree) {
if (defined $root) {
if (!top_of_kernel_tree($root)) {
die "$P: $root: --root does not point at a valid tree\n";
}
} else {
if (top_of_kernel_tree('.')) {
$root = '.';
} elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
top_of_kernel_tree($1)) {
$root = $1;
}
}
if (!defined $root) {
print "Must be run from the top-level dir. of a kernel tree\n";
exit(2);
}
}
my $emitted_corrupt = 0;
our $Ident = qr{[A-Za-z_][A-Za-z\d_]*};
our $Storage = qr{extern|static|asmlinkage};
our $Sparse = qr{
__user|
__kernel|
__force|
__iomem|
__must_check|
__init_refok|
__kprobes|
fastcall
}x;
our $Attribute = qr{
const|
__read_mostly|
__kprobes|
__(?:mem|cpu|dev|)(?:initdata|init)
}x;
our $Inline = qr{inline|__always_inline|noinline};
our $NonptrType = qr{
\b
(?:const\s+)?
(?:unsigned\s+)?
(?:
void|
char|
short|
int|
long|
unsigned|
float|
double|
bool|
long\s+int|
long\s+long|
long\s+long\s+int|
(?:__)?(?:u|s|be|le)(?:8|16|32|64)|
struct\s+$Ident|
union\s+$Ident|
enum\s+$Ident|
${Ident}_t|
${Ident}_handler|
${Ident}_handler_fn
)
(?:\s+$Sparse)*
\b
}x;
our $Type = qr{
\b$NonptrType\b
(?:\s*\*+\s*const|\s*\*+|(?:\s*\[\s*\])+)?
(?:\s+$Sparse|\s+$Attribute)*
}x;
our $Declare = qr{(?:$Storage\s+)?$Type};
our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
our $Lval = qr{$Ident(?:$Member)*};
our $Constant = qr{(?:[0-9]+|0x[0-9a-fA-F]+)[UL]*};
our $Assignment = qr{(?:\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=)};
our $Operators = qr{
<=|>=|==|!=|
=>|->|<<|>>|<|>|!|~|
&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/
}x;
our $Bare = '';
$chk_signoff = 0 if ($file);
my @dep_includes = ();
my @dep_functions = ();
my $removal = "Documentation/feature-removal-schedule.txt";
if ($tree && -f "$root/$removal") {
open(REMOVE, "<$root/$removal") ||
die "$P: $removal: open failed - $!\n";
while (<REMOVE>) {
if (/^Check:\s+(.*\S)/) {
for my $entry (split(/[, ]+/, $1)) {
if ($entry =~ m@include/(.*)@) {
push(@dep_includes, $1);
} elsif ($entry !~ m@/@) {
push(@dep_functions, $entry);
}
}
}
}
}
my @rawlines = ();
for my $filename (@ARGV) {
if ($file) {
open(FILE, "diff -u /dev/null $filename|") ||
die "$P: $filename: diff failed - $!\n";
} else {
open(FILE, "<$filename") ||
die "$P: $filename: open failed - $!\n";
}
while (<FILE>) {
chomp;
push(@rawlines, $_);
}
close(FILE);
if (!process($filename, @rawlines)) {
$exit = 1;
}
@rawlines = ();
}
exit($exit);
sub top_of_kernel_tree {
my ($root) = @_;
my @tree_check = (
"COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
"README", "Documentation", "arch", "include", "drivers",
"fs", "init", "ipc", "kernel", "lib", "scripts",
);
foreach my $check (@tree_check) {
if (! -e $root . '/' . $check) {
return 0;
}
}
return 1;
}
sub expand_tabs {
my ($str) = @_;
my $res = '';
my $n = 0;
for my $c (split(//, $str)) {
if ($c eq "\t") {
$res .= ' ';
$n++;
for (; ($n % 8) != 0; $n++) {
$res .= ' ';
}
next;
}
$res .= $c;
$n++;
}
return $res;
}
sub copy_spacing {
my ($str) = @_;
my $res = '';
for my $c (split(//, $str)) {
if ($c eq "\t") {
$res .= $c;
} else {
$res .= ' ';
}
}
return $res;
}
sub line_stats {
my ($line) = @_;
# Drop the diff line leader and expand tabs
$line =~ s/^.//;
$line = expand_tabs($line);
# Pick the indent from the front of the line.
my ($white) = ($line =~ /^(\s*)/);
return (length($line), length($white));
}
sub sanitise_line {
my ($line) = @_;
my $res = '';
my $l = '';
my $quote = '';
foreach my $c (split(//, $line)) {
if ($l ne "\\" && ($c eq "'" || $c eq '"')) {
if ($quote eq '') {
$quote = $c;
$res .= $c;
$l = $c;
next;
} elsif ($quote eq $c) {
$quote = '';
}
}
if ($quote && $c ne "\t") {
$res .= "X";
} else {
$res .= $c;
}
$l = $c;
}
return $res;
}
sub ctx_block_get {
my ($linenr, $remain, $outer, $open, $close, $off) = @_;
my $line;
my $start = $linenr - 1;
my $blk = '';
my @o;
my @c;
my @res = ();
my $level = 0;
for ($line = $start; $remain > 0; $line++) {
next if ($rawlines[$line] =~ /^-/);
$remain--;
$blk .= $rawlines[$line];
foreach my $c (split(//, $rawlines[$line])) {
##print "C<$c>L<$level><$open$close>O<$off>\n";
if ($off > 0) {
$off--;
next;
}
if ($c eq $close && $level > 0) {
$level--;
last if ($level == 0);
} elsif ($c eq $open) {
$level++;
}
}
if (!$outer || $level <= 1) {
push(@res, $rawlines[$line]);
}
last if ($level == 0);
}
return ($level, @res);
}
sub ctx_block_outer {
my ($linenr, $remain) = @_;
my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
return @r;
}
sub ctx_block {
my ($linenr, $remain) = @_;
my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
return @r;
}
sub ctx_statement {
my ($linenr, $remain, $off) = @_;
my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
return @r;
}
sub ctx_block_level {
my ($linenr, $remain) = @_;
return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
}
sub ctx_statement_level {
my ($linenr, $remain, $off) = @_;
return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
}
sub ctx_locate_comment {
my ($first_line, $end_line) = @_;
# Catch a comment on the end of the line itself.
my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*$@);
return $current_comment if (defined $current_comment);
# Look through the context and try and figure out if there is a
# comment.
my $in_comment = 0;
$current_comment = '';
for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
my $line = $rawlines[$linenr - 1];
#warn " $line\n";
if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
$in_comment = 1;
}
if ($line =~ m@/\*@) {
$in_comment = 1;
}
if (!$in_comment && $current_comment ne '') {
$current_comment = '';
}
$current_comment .= $line . "\n" if ($in_comment);
if ($line =~ m@\*/@) {
$in_comment = 0;
}
}
chomp($current_comment);
return($current_comment);
}
sub ctx_has_comment {
my ($first_line, $end_line) = @_;
my $cmt = ctx_locate_comment($first_line, $end_line);
##print "LINE: $rawlines[$end_line - 1 ]\n";
##print "CMMT: $cmt\n";
return ($cmt ne '');
}
sub cat_vet {
my ($vet) = @_;
my ($res, $coded);
$res = '';
while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
$res .= $1;
if ($2 ne '') {
$coded = sprintf("^%c", unpack('C', $2) + 64);
$res .= $coded;
}
}
$res =~ s/$/\$/;
return $res;
}
sub annotate_values {
my ($stream, $type) = @_;
my $res;
my $cur = $stream;
my $debug = 0;
print "$stream\n" if ($debug);
##my $type = 'N';
my $pos = 0;
my $preprocessor = 0;
my $paren = 0;
my @paren_type;
# Include any user defined types we may have found as we went.
my $type_match = "(?:$Type$Bare)";
while (length($cur)) {
print " <$type> " if ($debug);
if ($cur =~ /^(\s+)/o) {
print "WS($1)\n" if ($debug);
if ($1 =~ /\n/ && $preprocessor) {
$preprocessor = 0;
$type = 'N';
}
} elsif ($cur =~ /^($type_match)/) {
print "DECLARE($1)\n" if ($debug);
$type = 'T';
} elsif ($cur =~ /^(#\s*define\s*$Ident)(\(?)/o) {
print "DEFINE($1)\n" if ($debug);
$preprocessor = 1;
$paren_type[$paren] = 'N';
} elsif ($cur =~ /^(#\s*(?:ifdef|ifndef|if|else|endif))/o) {
print "PRE($1)\n" if ($debug);
$preprocessor = 1;
$type = 'N';
} elsif ($cur =~ /^(\\\n)/o) {
print "PRECONT($1)\n" if ($debug);
} elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
print "SIZEOF($1)\n" if ($debug);
if (defined $2) {
$paren_type[$paren] = 'V';
}
$type = 'N';
} elsif ($cur =~ /^(if|while|typeof)\b/o) {
print "COND($1)\n" if ($debug);
$paren_type[$paren] = 'N';
$type = 'N';
} elsif ($cur =~/^(return|case|else)/o) {
print "KEYWORD($1)\n" if ($debug);
$type = 'N';
} elsif ($cur =~ /^(\()/o) {
print "PAREN('$1')\n" if ($debug);
$paren++;
$type = 'N';
} elsif ($cur =~ /^(\))/o) {
$paren-- if ($paren > 0);
if (defined $paren_type[$paren]) {
$type = $paren_type[$paren];
undef $paren_type[$paren];
print "PAREN('$1') -> $type\n" if ($debug);
} else {
print "PAREN('$1')\n" if ($debug);
}
} elsif ($cur =~ /^($Ident)\(/o) {
print "FUNC($1)\n" if ($debug);
$paren_type[$paren] = 'V';
} elsif ($cur =~ /^($Ident|$Constant)/o) {
print "IDENT($1)\n" if ($debug);
$type = 'V';
} elsif ($cur =~ /^($Assignment)/o) {
print "ASSIGN($1)\n" if ($debug);
$type = 'N';
} elsif ($cur =~ /^(;|{|}|\?|:|\[)/o) {
print "END($1)\n" if ($debug);
$type = 'N';
} elsif ($cur =~ /^($Operators)/o) {
print "OP($1)\n" if ($debug);
if ($1 ne '++' && $1 ne '--') {
$type = 'N';
}
} elsif ($cur =~ /(^.)/o) {
print "C($1)\n" if ($debug);
}
if (defined $1) {
$cur = substr($cur, length($1));
$res .= $type x length($1);
}
}
return $res;
}
my $prefix = '';
my @report = ();
sub report {
push(@report, $prefix . $_[0]);
}
sub report_dump {
@report;
}
sub ERROR {
report("ERROR: $_[0]\n");
our $clean = 0;
our $cnt_error++;
}
sub WARN {
report("WARNING: $_[0]\n");
our $clean = 0;
our $cnt_warn++;
}
sub CHK {
if ($check) {
report("CHECK: $_[0]\n");
our $clean = 0;
our $cnt_chk++;
}
}
sub process {
my $filename = shift;
my @lines = @_;
my $linenr=0;
my $prevline="";
my $stashline="";
my $length;
my $indent;
my $previndent=0;
my $stashindent=0;
our $clean = 1;
my $signoff = 0;
my $is_patch = 0;
our $cnt_lines = 0;
our $cnt_error = 0;
our $cnt_warn = 0;
our $cnt_chk = 0;
# Trace the real file/line as we go.
my $realfile = '';
my $realline = 0;
my $realcnt = 0;
my $here = '';
my $in_comment = 0;
my $first_line = 0;
my $prev_values = 'N';
# Possible bare types.
my @bare = ();
# Pre-scan the patch looking for any __setup documentation.
my @setup_docs = ();
my $setup_docs = 0;
foreach my $line (@lines) {
if ($line=~/^\+\+\+\s+(\S+)/) {
$setup_docs = 0;
if ($1 =~ m@Documentation/kernel-parameters.txt$@) {
$setup_docs = 1;
}
next;
}
if ($setup_docs && $line =~ /^\+/) {
push(@setup_docs, $line);
}
}
$prefix = '';
foreach my $line (@lines) {
$linenr++;
my $rawline = $line;
#extract the filename as it passes
if ($line=~/^\+\+\+\s+(\S+)/) {
$realfile=$1;
$realfile =~ s@^[^/]*/@@;
$in_comment = 0;
next;
}
#extract the line range in the file after the patch is applied
if ($line=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
$is_patch = 1;
$first_line = $linenr + 1;
$in_comment = 0;
$realline=$1-1;
if (defined $2) {
$realcnt=$3+1;
} else {
$realcnt=1+1;
}
$prev_values = 'N';
next;
}
# track the line number as we move through the hunk, note that
# new versions of GNU diff omit the leading space on completely
# blank context lines so we need to count that too.
if ($line =~ /^( |\+|$)/) {
$realline++;
$realcnt-- if ($realcnt != 0);
# track any sort of multi-line comment. Obviously if
# the added text or context do not include the whole
# comment we will not see it. Such is life.
#
# Guestimate if this is a continuing comment. If this
# is the start of a diff block and this line starts
# ' *' then it is very likely a comment.
if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
$in_comment = 1;
}
if ($line =~ m@/\*@) {
$in_comment = 1;
}
if ($line =~ m@\*/@) {
$in_comment = 0;
}
# Measure the line length and indent.
($length, $indent) = line_stats($line);
# Track the previous line.
($prevline, $stashline) = ($stashline, $line);
($previndent, $stashindent) = ($stashindent, $indent);
} elsif ($realcnt == 1) {
$realcnt--;
}
#make up the handle for any error we report on this line
$here = "#$linenr: " if (!$file);
$here = "#$realline: " if ($file);
$here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
my $hereline = "$here\n$line\n";
my $herecurr = "$here\n$line\n";
my $hereprev = "$here\n$prevline\n$line\n";
$prefix = "$filename:$realline: " if ($emacs && $file);
$prefix = "$filename:$linenr: " if ($emacs && !$file);
$cnt_lines++ if ($realcnt != 0);
#check the patch for a signoff:
if ($line =~ /^\s*signed-off-by:/i) {
# This is a signoff, if ugly, so do not double report.
$signoff++;
if (!($line =~ /^\s*Signed-off-by:/)) {
WARN("Signed-off-by: is the preferred form\n" .
$herecurr);
}
if ($line =~ /^\s*signed-off-by:\S/i) {
WARN("need space after Signed-off-by:\n" .
$herecurr);
}
}
# Check for wrappage within a valid hunk of the file
if ($realcnt != 0 && $line !~ m{^(?:\+|-| |$)}) {
ERROR("patch seems to be corrupt (line wrapped?)\n" .
$herecurr) if (!$emitted_corrupt++);
}
# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
if (($realfile =~ /^$/ || $line =~ /^\+/) &&
!($line =~ m/^(
[\x09\x0A\x0D\x20-\x7E] # ASCII
| [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
)*$/x )) {
ERROR("Invalid UTF-8\n" . $herecurr);
}
#ignore lines being removed
if ($line=~/^-/) {next;}
# check we are in a valid source file if not then ignore this hunk
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
#trailing whitespace
if ($line =~ /^\+.*\015/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("DOS line endings\n" . $herevet);
} elsif ($line =~ /^\+.*\S\s+$/ || $line =~ /^\+\s+$/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("trailing whitespace\n" . $herevet);
}
#80 column limit
if ($line =~ /^\+/ && !($prevline=~/\/\*\*/) && $length > 80) {
WARN("line over 80 characters\n" . $herecurr);
}
# check we are in a valid source file *.[hc] if not then ignore this hunk
next if ($realfile !~ /\.[hc]$/);
# at the beginning of a line any tabs must come first and anything
# more than 8 must use tabs.
if ($line=~/^\+\s* \t\s*\S/ or $line=~/^\+\s* \s*/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("use tabs not spaces\n" . $herevet);
}
# Remove comments from the line before processing.
my $comment_edge = ($line =~ s@/\*.*\*/@@g) +
($line =~ s@/\*.*@@) +
($line =~ s@^(.).*\*/@$1@);
# The rest of our checks refer specifically to C style
# only apply those _outside_ comments. Only skip
# lines in the middle of comments.
next if (!$comment_edge && $in_comment);
# Standardise the strings and chars within the input to simplify matching.
$line = sanitise_line($line);
# Check for potential 'bare' types
if ($realcnt &&
$line !~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?$Type\b/ &&
$line !~ /$Ident:\s*$/ &&
$line !~ /^.\s*$Ident\s*\(/ &&
# definitions in global scope can only start with types
($line =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?($Ident)\b/ ||
# declarations always start with types
$line =~ /^.\s*(?:$Storage\s+)?($Ident)\b\s*\**\s*$Ident\s*(?:;|=)/) ||
# any (foo ... *) is a pointer cast, and foo is a type
$line =~ /\(($Ident)(?:\s+$Sparse)*\s*\*+\s*\)/) {
my $possible = $1;
if ($possible !~ /^(?:$Storage|$Type|DEFINE_\S+)$/ &&
$possible ne 'goto' && $possible ne 'return' &&
$possible ne 'struct' && $possible ne 'enum' &&
$possible ne 'case' && $possible ne 'else' &&
$possible ne 'typedef') {
#print "POSSIBLE<$possible>\n";
push(@bare, $possible);
my $bare = join("|", @bare);
$Bare = '|' . qr{
\b(?:$bare)\b
(?:\s*\*+\s*const|\s*\*+|(?:\s*\[\s*\])+)?
(?:\s+$Sparse)*
}x;
}
}
#
# Checks which may be anchored in the context.
#
# Check for switch () and associated case and default
# statements should be at the same indent.
if ($line=~/\bswitch\s*\(.*\)/) {
my $err = '';
my $sep = '';
my @ctx = ctx_block_outer($linenr, $realcnt);
shift(@ctx);
for my $ctx (@ctx) {
my ($clen, $cindent) = line_stats($ctx);
if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
$indent != $cindent) {
$err .= "$sep$ctx\n";
$sep = '';
} else {
$sep = "[...]\n";
}
}
if ($err ne '') {
ERROR("switch and case should be at the same indent\n$hereline$err");
}
}
# if/while/etc brace do not go on next line, unless defining a do while loop,
# or if that brace on the next line is for something else
if ($line =~ /\b(?:(if|while|for|switch)\s*\(|do\b|else\b)/ && $line !~ /^.#/) {
my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
my $ctx_ln = $linenr + $#ctx + 1;
my $ctx_cnt = $realcnt - $#ctx - 1;
my $ctx = join("\n", @ctx);
# Skip over any removed lines in the context following statement.
while ($ctx_cnt > 0 && $lines[$ctx_ln - 1] =~ /^-/) {
$ctx_ln++;
$ctx_cnt--;
}
##warn "line<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>";
if ($ctx !~ /{\s*/ && $ctx_cnt > 0 && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
ERROR("That open brace { should be on the previous line\n" .
"$here\n$ctx\n$lines[$ctx_ln - 1]");
}
if ($level == 0 && $ctx =~ /\)\s*\;\s*$/ && defined $lines[$ctx_ln - 1]) {
my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
if ($nindent > $indent) {
WARN("Trailing semicolon indicates no statements, indent implies otherwise\n" .
"$here\n$ctx\n$lines[$ctx_ln - 1]");
}
}
}
# Track the 'values' across context and added lines.
my $opline = $line; $opline =~ s/^./ /;
my $curr_values = annotate_values($opline . "\n", $prev_values);
$curr_values = $prev_values . $curr_values;
#warn "--> $opline\n";
#warn "--> $curr_values ($prev_values)\n";
$prev_values = substr($curr_values, -1);
#ignore lines not being added
if ($line=~/^[^\+]/) {next;}
# TEST: allow direct testing of the type matcher.
if ($tst_type && $line =~ /^.$Declare$/) {
ERROR("TEST: is type $Declare\n" . $herecurr);
next;
}
# check for initialisation to aggregates open brace on the next line
if ($prevline =~ /$Declare\s*$Ident\s*=\s*$/ &&
$line =~ /^.\s*{/) {
ERROR("That open brace { should be on the previous line\n" . $hereprev);
}
#
# Checks which are anchored on the added line.
#
# check for malformed paths in #include statements (uses RAW line)
if ($rawline =~ m{^.#\s*include\s+[<"](.*)[">]}) {
my $path = $1;
if ($path =~ m{//}) {
ERROR("malformed #include filename\n" .
$herecurr);
}
# Sanitise this special form of string.
$path = 'X' x length($path);
$line =~ s{\<.*\>}{<$path>};
}
# no C99 // comments
if ($line =~ m{//}) {
ERROR("do not use C99 // comments\n" . $herecurr);
}
# Remove C99 comments.
$line =~ s@//.*@@;
$opline =~ s@//.*@@;
#EXPORT_SYMBOL should immediately follow its function closing }.
if (($line =~ /EXPORT_SYMBOL.*\((.*)\)/) ||
($line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
my $name = $1;
if (($prevline !~ /^}/) &&
($prevline !~ /^\+}/) &&
($prevline !~ /^ }/) &&
($prevline !~ /\b\Q$name\E(?:\s+$Attribute)?\s*(?:;|=)/)) {
WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
}
}
# check for external initialisers.
if ($line =~ /^.$Type\s*$Ident\s*=\s*(0|NULL);/) {
ERROR("do not initialise externals to 0 or NULL\n" .
$herecurr);
}
# check for static initialisers.
if ($line =~ /\s*static\s.*=\s*(0|NULL);/) {
ERROR("do not initialise statics to 0 or NULL\n" .
$herecurr);
}
# check for new typedefs, only function parameters and sparse annotations
# make sense.
if ($line =~ /\btypedef\s/ &&
$line !~ /\btypedef\s+$Type\s+\(\s*\*?$Ident\s*\)\s*\(/ &&
$line !~ /\b__bitwise(?:__|)\b/) {
WARN("do not add new typedefs\n" . $herecurr);
}
# * goes on variable not on type
if ($line =~ m{\($NonptrType(\*+)(?:\s+const)?\)}) {
ERROR("\"(foo$1)\" should be \"(foo $1)\"\n" .
$herecurr);
} elsif ($line =~ m{\($NonptrType\s+(\*+)(?!\s+const)\s+\)}) {
ERROR("\"(foo $1 )\" should be \"(foo $1)\"\n" .
$herecurr);
} elsif ($line =~ m{$NonptrType(\*+)(?:\s+(?:$Attribute|$Sparse))?\s+[A-Za-z\d_]+}) {
ERROR("\"foo$1 bar\" should be \"foo $1bar\"\n" .
$herecurr);
} elsif ($line =~ m{$NonptrType\s+(\*+)(?!\s+(?:$Attribute|$Sparse))\s+[A-Za-z\d_]+}) {
ERROR("\"foo $1 bar\" should be \"foo $1bar\"\n" .
$herecurr);
}
# # no BUG() or BUG_ON()
# if ($line =~ /\b(BUG|BUG_ON)\b/) {
# print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
# print "$herecurr";
# $clean = 0;
# }
# printk should use KERN_* levels. Note that follow on printk's on the
# same line do not need a level, so we use the current block context
# to try and find and validate the current printk. In summary the current
# printk includes all preceeding printk's which have no newline on the end.
# we assume the first bad printk is the one to report.
if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
my $ok = 0;
for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
#print "CHECK<$lines[$ln - 1]\n";
# we have a preceeding printk if it ends
# with "\n" ignore it, else it is to blame
if ($lines[$ln - 1] =~ m{\bprintk\(}) {
if ($rawlines[$ln - 1] !~ m{\\n"}) {
$ok = 1;
}
last;
}
}
if ($ok == 0) {
WARN("printk() should include KERN_ facility level\n" . $herecurr);
}
}
# function brace can't be on same line, except for #defines of do while,
# or if closed on same line
if (($line=~/$Type\s*[A-Za-z\d_]+\(.*\).* {/) and
!($line=~/\#define.*do\s{/) and !($line=~/}/)) {
ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
}
# check for spaces between functions and their parentheses.
while ($line =~ /($Ident)\s+\(/g) {
if ($1 !~ /^(?:if|for|while|switch|return|volatile|__volatile__|__attribute__|format|__extension__|Copyright|case)$/ &&
$line !~ /$Type\s+\(/ && $line !~ /^.\#\s*define\b/) {
WARN("no space between function name and open parenthesis '('\n" . $herecurr);
}
}
# Check operator spacing.
if (!($line=~/\#\s*include/)) {
my $ops = qr{
<<=|>>=|<=|>=|==|!=|
\+=|-=|\*=|\/=|%=|\^=|\|=|&=|
=>|->|<<|>>|<|>|=|!|~|
&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/
}x;
my @elements = split(/($ops|;)/, $opline);
my $off = 0;
my $blank = copy_spacing($opline);
for (my $n = 0; $n < $#elements; $n += 2) {
$off += length($elements[$n]);
my $a = '';
$a = 'V' if ($elements[$n] ne '');
$a = 'W' if ($elements[$n] =~ /\s$/);
$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
$a = 'O' if ($elements[$n] eq '');
$a = 'E' if ($elements[$n] eq '' && $n == 0);
my $op = $elements[$n + 1];
my $c = '';