2 # (c) 2001, Dave Jones. <davej@redhat.com> (the file handling bit)
3 # (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
4 # (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
5 # (c) 2008, Andy Whitcroft <apw@canonical.com>
6 # Licensed under the terms of the GNU GPL License version 2
15 use Getopt::Long qw(:config no_auto_abbrev);
32 'q|quiet+' => \$quiet,
34 'signoff!' => \$chk_signoff,
35 'patch!' => \$chk_patch,
39 'subjective!' => \$check,
42 'summary!' => \$summary,
43 'mailback!' => \$mailback,
44 'summary-file!' => \$summary_file,
47 'test-only=s' => \$tst_only,
53 print "usage: $P [options] patchfile\n";
54 print "version: $V\n";
55 print "options: -q => quiet\n";
56 print " --no-tree => run without a kernel tree\n";
57 print " --terse => one line per report\n";
58 print " --emacs => emacs compile window format\n";
59 print " --file => check a source file\n";
60 print " --strict => enable more subjective tests\n";
61 print " --root => path to the kernel tree root\n";
62 print " --no-summary => suppress the per-file summary\n";
63 print " --summary-file => include the filename in summary\n";
71 for my $key (keys %debug) {
73 eval "\${dbg_$key} = '$debug{$key}';";
84 if (!top_of_kernel_tree($root)) {
85 die "$P: $root: --root does not point at a valid tree\n";
88 if (top_of_kernel_tree('.')) {
90 } elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
91 top_of_kernel_tree($1)) {
97 print "Must be run from the top-level dir. of a kernel tree\n";
102 my $emitted_corrupt = 0;
104 our $Ident = qr{[A-Za-z_][A-Za-z\d_]*};
105 our $Storage = qr{extern|static|asmlinkage};
120 __(?:mem|cpu|dev|)(?:initdata|init)|
121 ____cacheline_aligned|
122 ____cacheline_aligned_in_smp|
123 ____cacheline_internodealigned_in_smp|
127 our $Inline = qr{inline|__always_inline|noinline};
128 our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
129 our $Lval = qr{$Ident(?:$Member)*};
131 our $Constant = qr{(?:[0-9]+|0x[0-9a-fA-F]+)[UL]*};
132 our $Assignment = qr{(?:\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=)};
133 our $Compare = qr{<=|>=|==|!=|<|>};
137 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%
145 [\x09\x0A\x0D\x20-\x7E] # ASCII
146 | [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
147 | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
148 | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
149 | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
150 | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
151 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
152 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
155 our $typeTypedefs = qr{(?x:
156 (?:__)?(?:u|s|be|le)(?:\d|\d\d)|
162 qr{(?:unsigned\s+)?char},
163 qr{(?:unsigned\s+)?short},
164 qr{(?:unsigned\s+)?int},
165 qr{(?:unsigned\s+)?long},
166 qr{(?:unsigned\s+)?long\s+int},
167 qr{(?:unsigned\s+)?long\s+long},
168 qr{(?:unsigned\s+)?long\s+long\s+int},
177 qr{${Ident}_handler},
178 qr{${Ident}_handler_fn},
180 our @modifierList = (
185 my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)";
186 my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)";
187 $Modifier = qr{(?:$Attribute|$Sparse|$mods)};
189 (?:$Modifier\s+|const\s+)*
191 (?:typeof|__typeof__)\s*\(\s*\**\s*$Ident\s*\)|
195 (?:\s+$Modifier|\s+const)*
199 (?:[\s\*]+\s*const|[\s\*]+|(?:\s*\[\s*\])+)?
200 (?:\s+$Inline|\s+$Modifier)*
202 $Declare = qr{(?:$Storage\s+)?$Type};
206 $chk_signoff = 0 if ($file);
208 my @dep_includes = ();
209 my @dep_functions = ();
210 my $removal = "Documentation/feature-removal-schedule.txt";
211 if ($tree && -f "$root/$removal") {
212 open(my $REMOVE, '<', "$root/$removal") ||
213 die "$P: $removal: open failed - $!\n";
215 if (/^Check:\s+(.*\S)/) {
216 for my $entry (split(/[, ]+/, $1)) {
217 if ($entry =~ m@include/(.*)@) {
218 push(@dep_includes, $1);
220 } elsif ($entry !~ m@/@) {
221 push(@dep_functions, $entry);
232 for my $filename (@ARGV) {
235 open($FILE, '-|', "diff -u /dev/null $filename") ||
236 die "$P: $filename: diff failed - $!\n";
237 } elsif ($filename eq '-') {
238 open($FILE, '<&STDIN');
240 open($FILE, '<', "$filename") ||
241 die "$P: $filename: open failed - $!\n";
243 if ($filename eq '-') {
244 $vname = 'Your patch';
253 if (!process($filename)) {
262 sub top_of_kernel_tree {
266 "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
267 "README", "Documentation", "arch", "include", "drivers",
268 "fs", "init", "ipc", "kernel", "lib", "scripts",
271 foreach my $check (@tree_check) {
272 if (! -e $root . '/' . $check) {
284 for my $c (split(//, $str)) {
288 for (; ($n % 8) != 0; $n++) {
300 (my $res = shift) =~ tr/\t/ /c;
307 # Drop the diff line leader and expand tabs
309 $line = expand_tabs($line);
311 # Pick the indent from the front of the line.
312 my ($white) = ($line =~ /^(\s*)/);
314 return (length($line), length($white));
317 my $sanitise_quote = '';
319 sub sanitise_line_reset {
320 my ($in_comment) = @_;
323 $sanitise_quote = '*/';
325 $sanitise_quote = '';
338 # Always copy over the diff marker.
339 $res = substr($line, 0, 1);
341 for ($off = 1; $off < length($line); $off++) {
342 $c = substr($line, $off, 1);
344 # Comments we are wacking completly including the begin
345 # and end, all to $;.
346 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
347 $sanitise_quote = '*/';
349 substr($res, $off, 2, "$;$;");
353 if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
354 $sanitise_quote = '';
355 substr($res, $off, 2, "$;$;");
360 # A \ in a string means ignore the next character.
361 if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
363 substr($res, $off, 2, 'XX');
368 if ($c eq "'" || $c eq '"') {
369 if ($sanitise_quote eq '') {
370 $sanitise_quote = $c;
372 substr($res, $off, 1, $c);
374 } elsif ($sanitise_quote eq $c) {
375 $sanitise_quote = '';
379 #print "c<$c> SQ<$sanitise_quote>\n";
380 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
381 substr($res, $off, 1, $;);
382 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
383 substr($res, $off, 1, 'X');
385 substr($res, $off, 1, $c);
389 # The pathname on a #include may be surrounded by '<' and '>'.
390 if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
391 my $clean = 'X' x length($1);
392 $res =~ s@\<.*\>@<$clean>@;
394 # The whole of a #error is a string.
395 } elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
396 my $clean = 'X' x length($1);
397 $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
403 sub ctx_statement_block {
404 my ($linenr, $remain, $off) = @_;
405 my $line = $linenr - 1;
422 @stack = (['', 0]) if ($#stack == -1);
424 #warn "CSB: blk<$blk> remain<$remain>\n";
425 # If we are about to drop off the end, pull in more
428 for (; $remain > 0; $line++) {
429 last if (!defined $lines[$line]);
430 next if ($lines[$line] =~ /^-/);
433 $blk .= $lines[$line] . "\n";
438 # Bail if there is no further context.
439 #warn "CSB: blk<$blk> off<$off> len<$len>\n";
445 $c = substr($blk, $off, 1);
446 $remainder = substr($blk, $off);
448 #warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
450 # Handle nested #if/#else.
451 if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
452 push(@stack, [ $type, $level ]);
453 } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
454 ($type, $level) = @{$stack[$#stack - 1]};
455 } elsif ($remainder =~ /^#\s*endif\b/) {
456 ($type, $level) = @{pop(@stack)};
459 # Statement ends at the ';' or a close '}' at the
461 if ($level == 0 && $c eq ';') {
465 # An else is really a conditional as long as its not else if
466 if ($level == 0 && $coff_set == 0 &&
467 (!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
468 $remainder =~ /^(else)(?:\s|{)/ &&
469 $remainder !~ /^else\s+if\b/) {
470 $coff = $off + length($1) - 1;
472 #warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
473 #warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
476 if (($type eq '' || $type eq '(') && $c eq '(') {
480 if ($type eq '(' && $c eq ')') {
482 $type = ($level != 0)? '(' : '';
484 if ($level == 0 && $coff < $soff) {
487 #warn "CSB: mark coff<$coff>\n";
490 if (($type eq '' || $type eq '{') && $c eq '{') {
494 if ($type eq '{' && $c eq '}') {
496 $type = ($level != 0)? '{' : '';
504 # We are truly at the end, so shuffle to the next line.
511 my $statement = substr($blk, $soff, $off - $soff + 1);
512 my $condition = substr($blk, $soff, $coff - $soff + 1);
514 #warn "STATEMENT<$statement>\n";
515 #warn "CONDITION<$condition>\n";
517 #print "coff<$coff> soff<$off> loff<$loff>\n";
519 return ($statement, $condition,
520 $line, $remain + 1, $off - $loff + 1, $level);
523 sub statement_lines {
526 # Strip the diff line prefixes and rip blank lines at start and end.
527 $stmt =~ s/(^|\n)./$1/g;
531 my @stmt_lines = ($stmt =~ /\n/g);
533 return $#stmt_lines + 2;
536 sub statement_rawlines {
539 my @stmt_lines = ($stmt =~ /\n/g);
541 return $#stmt_lines + 2;
544 sub statement_block_size {
547 $stmt =~ s/(^|\n)./$1/g;
553 my @stmt_lines = ($stmt =~ /\n/g);
554 my @stmt_statements = ($stmt =~ /;/g);
556 my $stmt_lines = $#stmt_lines + 2;
557 my $stmt_statements = $#stmt_statements + 1;
559 if ($stmt_lines > $stmt_statements) {
562 return $stmt_statements;
566 sub ctx_statement_full {
567 my ($linenr, $remain, $off) = @_;
568 my ($statement, $condition, $level);
572 # Grab the first conditional/block pair.
573 ($statement, $condition, $linenr, $remain, $off, $level) =
574 ctx_statement_block($linenr, $remain, $off);
575 #print "F: c<$condition> s<$statement> remain<$remain>\n";
576 push(@chunks, [ $condition, $statement ]);
577 if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
578 return ($level, $linenr, @chunks);
581 # Pull in the following conditional/block pairs and see if they
582 # could continue the statement.
584 ($statement, $condition, $linenr, $remain, $off, $level) =
585 ctx_statement_block($linenr, $remain, $off);
586 #print "C: c<$condition> s<$statement> remain<$remain>\n";
587 last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
589 push(@chunks, [ $condition, $statement ]);
592 return ($level, $linenr, @chunks);
596 my ($linenr, $remain, $outer, $open, $close, $off) = @_;
598 my $start = $linenr - 1;
605 my @stack = ($level);
606 for ($line = $start; $remain > 0; $line++) {
607 next if ($rawlines[$line] =~ /^-/);
610 $blk .= $rawlines[$line];
612 # Handle nested #if/#else.
613 if ($rawlines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
614 push(@stack, $level);
615 } elsif ($rawlines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
616 $level = $stack[$#stack - 1];
617 } elsif ($rawlines[$line] =~ /^.\s*#\s*endif\b/) {
618 $level = pop(@stack);
621 foreach my $c (split(//, $rawlines[$line])) {
622 ##print "C<$c>L<$level><$open$close>O<$off>\n";
628 if ($c eq $close && $level > 0) {
630 last if ($level == 0);
631 } elsif ($c eq $open) {
636 if (!$outer || $level <= 1) {
637 push(@res, $rawlines[$line]);
640 last if ($level == 0);
643 return ($level, @res);
645 sub ctx_block_outer {
646 my ($linenr, $remain) = @_;
648 my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
652 my ($linenr, $remain) = @_;
654 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
658 my ($linenr, $remain, $off) = @_;
660 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
663 sub ctx_block_level {
664 my ($linenr, $remain) = @_;
666 return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
668 sub ctx_statement_level {
669 my ($linenr, $remain, $off) = @_;
671 return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
674 sub ctx_locate_comment {
675 my ($first_line, $end_line) = @_;
677 # Catch a comment on the end of the line itself.
678 my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@);
679 return $current_comment if (defined $current_comment);
681 # Look through the context and try and figure out if there is a
684 $current_comment = '';
685 for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
686 my $line = $rawlines[$linenr - 1];
688 if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
691 if ($line =~ m@/\*@) {
694 if (!$in_comment && $current_comment ne '') {
695 $current_comment = '';
697 $current_comment .= $line . "\n" if ($in_comment);
698 if ($line =~ m@\*/@) {
703 chomp($current_comment);
704 return($current_comment);
706 sub ctx_has_comment {
707 my ($first_line, $end_line) = @_;
708 my $cmt = ctx_locate_comment($first_line, $end_line);
710 ##print "LINE: $rawlines[$end_line - 1 ]\n";
711 ##print "CMMT: $cmt\n";
717 my ($linenr, $cnt) = @_;
719 my $offset = $linenr - 1;
724 $line = $rawlines[$offset++];
725 next if (defined($line) && $line =~ /^-/);
737 while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
740 $coded = sprintf("^%c", unpack('C', $2) + 64);
749 my $av_preprocessor = 0;
755 $av_preprocessor = 0;
757 @av_paren_type = ('E');
758 $av_pend_colon = 'O';
761 sub annotate_values {
762 my ($stream, $type) = @_;
765 my $var = '_' x length($stream);
768 print "$stream\n" if ($dbg_values > 1);
770 while (length($cur)) {
771 @av_paren_type = ('E') if ($#av_paren_type < 0);
772 print " <" . join('', @av_paren_type) .
773 "> <$type> <$av_pending>" if ($dbg_values > 1);
774 if ($cur =~ /^(\s+)/o) {
775 print "WS($1)\n" if ($dbg_values > 1);
776 if ($1 =~ /\n/ && $av_preprocessor) {
777 $type = pop(@av_paren_type);
778 $av_preprocessor = 0;
781 } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\()/) {
782 print "DECLARE($1)\n" if ($dbg_values > 1);
785 } elsif ($cur =~ /^($Modifier)\s*/) {
786 print "MODIFIER($1)\n" if ($dbg_values > 1);
789 } elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) {
790 print "DEFINE($1,$2)\n" if ($dbg_values > 1);
791 $av_preprocessor = 1;
792 push(@av_paren_type, $type);
798 } elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) {
799 print "UNDEF($1)\n" if ($dbg_values > 1);
800 $av_preprocessor = 1;
801 push(@av_paren_type, $type);
803 } elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) {
804 print "PRE_START($1)\n" if ($dbg_values > 1);
805 $av_preprocessor = 1;
807 push(@av_paren_type, $type);
808 push(@av_paren_type, $type);
811 } elsif ($cur =~ /^(\#\s*(?:else|elif))/o) {
812 print "PRE_RESTART($1)\n" if ($dbg_values > 1);
813 $av_preprocessor = 1;
815 push(@av_paren_type, $av_paren_type[$#av_paren_type]);
819 } elsif ($cur =~ /^(\#\s*(?:endif))/o) {
820 print "PRE_END($1)\n" if ($dbg_values > 1);
822 $av_preprocessor = 1;
824 # Assume all arms of the conditional end as this
825 # one does, and continue as if the #endif was not here.
827 push(@av_paren_type, $type);
830 } elsif ($cur =~ /^(\\\n)/o) {
831 print "PRECONT($1)\n" if ($dbg_values > 1);
833 } elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
834 print "ATTR($1)\n" if ($dbg_values > 1);
838 } elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
839 print "SIZEOF($1)\n" if ($dbg_values > 1);
845 } elsif ($cur =~ /^(if|while|for)\b/o) {
846 print "COND($1)\n" if ($dbg_values > 1);
850 } elsif ($cur =~/^(case)/o) {
851 print "CASE($1)\n" if ($dbg_values > 1);
852 $av_pend_colon = 'C';
855 } elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) {
856 print "KEYWORD($1)\n" if ($dbg_values > 1);
859 } elsif ($cur =~ /^(\()/o) {
860 print "PAREN('$1')\n" if ($dbg_values > 1);
861 push(@av_paren_type, $av_pending);
865 } elsif ($cur =~ /^(\))/o) {
866 my $new_type = pop(@av_paren_type);
867 if ($new_type ne '_') {
869 print "PAREN('$1') -> $type\n"
870 if ($dbg_values > 1);
872 print "PAREN('$1')\n" if ($dbg_values > 1);
875 } elsif ($cur =~ /^($Ident)\s*\(/o) {
876 print "FUNC($1)\n" if ($dbg_values > 1);
880 } elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) {
881 if (defined $2 && $type eq 'C' || $type eq 'T') {
882 $av_pend_colon = 'B';
883 } elsif ($type eq 'E') {
884 $av_pend_colon = 'L';
886 print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1);
889 } elsif ($cur =~ /^($Ident|$Constant)/o) {
890 print "IDENT($1)\n" if ($dbg_values > 1);
893 } elsif ($cur =~ /^($Assignment)/o) {
894 print "ASSIGN($1)\n" if ($dbg_values > 1);
897 } elsif ($cur =~/^(;|{|})/) {
898 print "END($1)\n" if ($dbg_values > 1);
900 $av_pend_colon = 'O';
902 } elsif ($cur =~/^(,)/) {
903 print "COMMA($1)\n" if ($dbg_values > 1);
906 } elsif ($cur =~ /^(\?)/o) {
907 print "QUESTION($1)\n" if ($dbg_values > 1);
910 } elsif ($cur =~ /^(:)/o) {
911 print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1);
913 substr($var, length($res), 1, $av_pend_colon);
914 if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') {
919 $av_pend_colon = 'O';
921 } elsif ($cur =~ /^(\[)/o) {
922 print "CLOSE($1)\n" if ($dbg_values > 1);
925 } elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) {
928 print "OPV($1)\n" if ($dbg_values > 1);
935 substr($var, length($res), 1, $variant);
938 } elsif ($cur =~ /^($Operators)/o) {
939 print "OP($1)\n" if ($dbg_values > 1);
940 if ($1 ne '++' && $1 ne '--') {
944 } elsif ($cur =~ /(^.)/o) {
945 print "C($1)\n" if ($dbg_values > 1);
948 $cur = substr($cur, length($1));
949 $res .= $type x length($1);
957 my ($possible, $line) = @_;
959 print "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
960 if ($possible !~ /(?:
973 ^(?:typedef|struct|enum)\b
975 # Check for modifiers.
976 $possible =~ s/\s*$Storage\s*//g;
977 $possible =~ s/\s*$Sparse\s*//g;
978 if ($possible =~ /^\s*$/) {
980 } elsif ($possible =~ /\s/) {
981 $possible =~ s/\s*$Type\s*//g;
982 for my $modifier (split(' ', $possible)) {
983 warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
984 push(@modifierList, $modifier);
988 warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
989 push(@typeList, $possible);
993 warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1);
1000 if (defined $tst_only && $_[0] !~ /\Q$tst_only\E/) {
1003 my $line = $prefix . $_[0];
1005 $line = (split('\n', $line))[0] . "\n" if ($terse);
1007 push(our @report, $line);
1015 if (report("ERROR: $_[0]\n")) {
1021 if (report("WARNING: $_[0]\n")) {
1027 if ($check && report("CHECK: $_[0]\n")) {
1033 sub check_absolute_file {
1034 my ($absolute, $herecurr) = @_;
1035 my $file = $absolute;
1037 ##print "absolute<$absolute>\n";
1039 # See if any suffix of this path is a path within the tree.
1040 while ($file =~ s@^[^/]*/@@) {
1041 if (-f "$root/$file") {
1042 ##print "file<$file>\n";
1050 # It is, so see if the prefix is acceptable.
1051 my $prefix = $absolute;
1052 substr($prefix, -length($file)) = '';
1054 ##print "prefix<$prefix>\n";
1055 if ($prefix ne ".../") {
1056 WARN("use relative pathname instead of absolute in changelog text\n" . $herecurr);
1061 my $filename = shift;
1067 my $stashrawline="";
1084 # Trace the real file/line as we go.
1090 my $comment_edge = 0;
1094 my $prev_values = 'E';
1097 my %suppress_ifbraces;
1098 my %suppress_whiletrailers;
1100 # Pre-scan the patch sanitizing the lines.
1101 # Pre-scan the patch looking for any __setup documentation.
1103 my @setup_docs = ();
1106 sanitise_line_reset();
1108 foreach my $rawline (@rawlines) {
1112 if ($rawline=~/^\+\+\+\s+(\S+)/) {
1114 if ($1 =~ m@Documentation/kernel-parameters.txt$@) {
1119 if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
1128 # Guestimate if this is a continuing comment. Run
1129 # the context looking for a comment "edge". If this
1130 # edge is a close comment then we must be in a comment
1134 for (my $ln = $linenr + 1; $cnt > 0; $ln++) {
1135 next if (defined $rawlines[$ln - 1] &&
1136 $rawlines[$ln - 1] =~ /^-/);
1138 #print "RAW<$rawlines[$ln - 1]>\n";
1139 last if (!defined $rawlines[$ln - 1]);
1140 if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
1141 $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
1146 if (defined $edge && $edge eq '*/') {
1150 # Guestimate if this is a continuing comment. If this
1151 # is the start of a diff block and this line starts
1152 # ' *' then it is very likely a comment.
1153 if (!defined $edge &&
1154 $rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@)
1159 ##print "COMMENT:$in_comment edge<$edge> $rawline\n";
1160 sanitise_line_reset($in_comment);
1162 } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
1163 # Standardise the strings and chars within the input to
1164 # simplify matching -- only bother with positive lines.
1165 $line = sanitise_line($rawline);
1167 push(@lines, $line);
1170 $realcnt-- if ($line =~ /^(?:\+| |$)/);
1175 #print "==>$rawline\n";
1176 #print "-->$line\n";
1178 if ($setup_docs && $line =~ /^\+/) {
1179 push(@setup_docs, $line);
1187 foreach my $line (@lines) {
1190 my $rawline = $rawlines[$linenr - 1];
1191 my $hunk_line = ($realcnt != 0);
1193 #extract the line range in the file after the patch is applied
1194 if ($line=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
1196 $first_line = $linenr + 1;
1206 %suppress_ifbraces = ();
1207 %suppress_whiletrailers = ();
1210 # track the line number as we move through the hunk, note that
1211 # new versions of GNU diff omit the leading space on completely
1212 # blank context lines so we need to count that too.
1213 } elsif ($line =~ /^( |\+|$)/) {
1215 $realcnt-- if ($realcnt != 0);
1217 # Measure the line length and indent.
1218 ($length, $indent) = line_stats($rawline);
1220 # Track the previous line.
1221 ($prevline, $stashline) = ($stashline, $line);
1222 ($previndent, $stashindent) = ($stashindent, $indent);
1223 ($prevrawline, $stashrawline) = ($stashrawline, $rawline);
1225 #warn "line<$line>\n";
1227 } elsif ($realcnt == 1) {
1231 #make up the handle for any error we report on this line
1232 $prefix = "$filename:$realline: " if ($emacs && $file);
1233 $prefix = "$filename:$linenr: " if ($emacs && !$file);
1235 $here = "#$linenr: " if (!$file);
1236 $here = "#$realline: " if ($file);
1238 # extract the filename as it passes
1239 if ($line=~/^\+\+\+\s+(\S+)/) {
1241 $realfile =~ s@^([^/]*)/@@;
1244 if (!$file && $tree && $p1_prefix ne '' &&
1245 -e "$root/$p1_prefix") {
1246 WARN("patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
1249 if ($realfile =~ m@^include/asm/@) {
1250 ERROR("do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
1255 $here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
1257 my $hereline = "$here\n$rawline\n";
1258 my $herecurr = "$here\n$rawline\n";
1259 my $hereprev = "$here\n$prevrawline\n$rawline\n";
1261 $cnt_lines++ if ($realcnt != 0);
1263 #check the patch for a signoff:
1264 if ($line =~ /^\s*signed-off-by:/i) {
1265 # This is a signoff, if ugly, so do not double report.
1267 if (!($line =~ /^\s*Signed-off-by:/)) {
1268 WARN("Signed-off-by: is the preferred form\n" .
1271 if ($line =~ /^\s*signed-off-by:\S/i) {
1272 WARN("space required after Signed-off-by:\n" .
1277 # Check for wrappage within a valid hunk of the file
1278 if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
1279 ERROR("patch seems to be corrupt (line wrapped?)\n" .
1280 $herecurr) if (!$emitted_corrupt++);
1283 # Check for absolute kernel paths.
1285 while ($line =~ m{(?:^|\s)(/\S*)}g) {
1288 if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
1289 check_absolute_file($1, $herecurr)) {
1292 check_absolute_file($file, $herecurr);
1297 # UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
1298 if (($realfile =~ /^$/ || $line =~ /^\+/) &&
1299 $rawline !~ m/^$UTF8*$/) {
1300 my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
1302 my $blank = copy_spacing($rawline);
1303 my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
1304 my $hereptr = "$hereline$ptr\n";
1306 ERROR("Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
1309 # ignore non-hunk lines and lines being removed
1310 next if (!$hunk_line || $line =~ /^-/);
1312 #trailing whitespace
1313 if ($line =~ /^\+.*\015/) {
1314 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1315 ERROR("DOS line endings\n" . $herevet);
1317 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
1318 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1319 ERROR("trailing whitespace\n" . $herevet);
1322 # check we are in a valid source file if not then ignore this hunk
1323 next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
1326 if ($line =~ /^\+/ && $prevrawline !~ /\/\*\*/ &&
1327 $rawline !~ /^.\s*\*\s*\@$Ident\s/ &&
1328 $line !~ /^\+\s*printk\s*\(\s*(?:KERN_\S+\s*)?"[X\t]*"\s*(?:,|\)\s*;)\s*$/ &&
1331 WARN("line over 80 characters\n" . $herecurr);
1334 # check for adding lines without a newline.
1335 if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
1336 WARN("adding a line without newline at end of file\n" . $herecurr);
1339 # check we are in a valid source file C or perl if not then ignore this hunk
1340 next if ($realfile !~ /\.(h|c|pl)$/);
1342 # at the beginning of a line any tabs must come first and anything
1343 # more than 8 must use tabs.
1344 if ($rawline =~ /^\+\s* \t\s*\S/ ||
1345 $rawline =~ /^\+\s* \s*/) {
1346 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1347 ERROR("code indent should use tabs where possible\n" . $herevet);
1350 # check we are in a valid C source file if not then ignore this hunk
1351 next if ($realfile !~ /\.(h|c)$/);
1353 # check for RCS/CVS revision markers
1354 if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
1355 WARN("CVS style keyword markers, these will _not_ be updated\n". $herecurr);
1358 # Check for potential 'bare' types
1359 my ($stat, $cond, $line_nr_next, $remain_next, $off_next);
1360 if ($realcnt && $line =~ /.\s*\S/) {
1361 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
1362 ctx_statement_block($linenr, $realcnt, 0);
1363 $stat =~ s/\n./\n /g;
1364 $cond =~ s/\n./\n /g;
1369 # Ignore goto labels.
1370 if ($s =~ /$Ident:\*$/s) {
1372 # Ignore functions being called
1373 } elsif ($s =~ /^.\s*$Ident\s*\(/s) {
1375 # declarations always start with types
1376 } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(?:;|=|,|\()/s) {
1379 possible($type, "A:" . $s);
1381 # definitions in global scope can only start with types
1382 } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) {
1383 possible($1, "B:" . $s);
1386 # any (foo ... *) is a pointer cast, and foo is a type
1387 while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) {
1388 possible($1, "C:" . $s);
1391 # Check for any sort of function declaration.
1392 # int foo(something bar, other baz);
1393 # void (*store_gdt)(x86_descr_ptr *);
1394 if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
1395 my ($name_len) = length($1);
1398 substr($ctx, 0, $name_len + 1, '');
1399 $ctx =~ s/\)[^\)]*$//;
1401 for my $arg (split(/\s*,\s*/, $ctx)) {
1402 if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
1404 possible($1, "D:" . $s);
1412 # Checks which may be anchored in the context.
1415 # Check for switch () and associated case and default
1416 # statements should be at the same indent.
1417 if ($line=~/\bswitch\s*\(.*\)/) {
1420 my @ctx = ctx_block_outer($linenr, $realcnt);
1422 for my $ctx (@ctx) {
1423 my ($clen, $cindent) = line_stats($ctx);
1424 if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
1425 $indent != $cindent) {
1426 $err .= "$sep$ctx\n";
1433 ERROR("switch and case should be at the same indent\n$hereline$err");
1437 # if/while/etc brace do not go on next line, unless defining a do while loop,
1438 # or if that brace on the next line is for something else
1439 if ($line =~ /(.*)\b((?:if|while|for|switch)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) {
1440 my $pre_ctx = "$1$2";
1442 my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
1443 my $ctx_cnt = $realcnt - $#ctx - 1;
1444 my $ctx = join("\n", @ctx);
1446 my $ctx_ln = $linenr;
1447 my $ctx_skip = $realcnt;
1449 while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
1450 defined $lines[$ctx_ln - 1] &&
1451 $lines[$ctx_ln - 1] =~ /^-/)) {
1452 ##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
1453 $ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
1457 #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
1458 #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
1460 if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln -1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
1461 ERROR("that open brace { should be on the previous line\n" .
1462 "$here\n$ctx\n$lines[$ctx_ln - 1]\n");
1464 if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
1465 $ctx =~ /\)\s*\;\s*$/ &&
1466 defined $lines[$ctx_ln - 1])
1468 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
1469 if ($nindent > $indent) {
1470 WARN("trailing semicolon indicates no statements, indent implies otherwise\n" .
1471 "$here\n$ctx\n$lines[$ctx_ln - 1]\n");
1476 # Check relative indent for conditionals and blocks.
1477 if ($line =~ /\b(?:(?:if|while|for)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
1478 my ($s, $c) = ($stat, $cond);
1480 substr($s, 0, length($c), '');
1482 # Make sure we remove the line prefixes as we have
1483 # none on the first line, and are going to readd them
1487 # Find out how long the conditional actually is.
1488 my @newlines = ($c =~ /\n/gs);
1489 my $cond_lines = 1 + $#newlines;
1491 # We want to check the first line inside the block
1492 # starting at the end of the conditional, so remove:
1493 # 1) any blank line termination
1494 # 2) any opening brace { on end of the line
1496 my $continuation = 0;
1498 $s =~ s/^.*\bdo\b//;
1500 if ($s =~ s/^\s*\\//) {
1503 if ($s =~ s/^\s*?\n//) {
1508 # Also ignore a loop construct at the end of a
1509 # preprocessor statement.
1510 if (($prevline =~ /^.\s*#\s*define\s/ ||
1511 $prevline =~ /\\\s*$/) && $continuation == 0) {
1517 while ($cond_ptr != $cond_lines) {
1518 $cond_ptr = $cond_lines;
1520 # If we see an #else/#elif then the code
1522 if ($s =~ /^\s*\#\s*(?:else|elif)/) {
1527 # 1) blank lines, they should be at 0,
1528 # 2) preprocessor lines, and
1530 if ($continuation ||
1532 $s =~ /^\s*#\s*?/ ||
1533 $s =~ /^\s*$Ident\s*:/) {
1534 $continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
1540 my (undef, $sindent) = line_stats("+" . $s);
1541 my $stat_real = raw_line($linenr, $cond_lines);
1543 # Check if either of these lines are modified, else
1544 # this is not this patch's fault.
1545 if (!defined($stat_real) ||
1546 $stat !~ /^\+/ && $stat_real !~ /^\+/) {
1549 if (defined($stat_real) && $cond_lines > 1) {
1550 $stat_real = "[...]\n$stat_real";
1553 #print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
1555 if ($check && (($sindent % 8) != 0 ||
1556 ($sindent <= $indent && $s ne ''))) {
1557 WARN("suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
1561 # Track the 'values' across context and added lines.
1562 my $opline = $line; $opline =~ s/^./ /;
1563 my ($curr_values, $curr_vars) =
1564 annotate_values($opline . "\n", $prev_values);
1565 $curr_values = $prev_values . $curr_values;
1567 my $outline = $opline; $outline =~ s/\t/ /g;
1568 print "$linenr > .$outline\n";
1569 print "$linenr > $curr_values\n";
1570 print "$linenr > $curr_vars\n";
1572 $prev_values = substr($curr_values, -1);
1574 #ignore lines not being added
1575 if ($line=~/^[^\+]/) {next;}
1577 # TEST: allow direct testing of the type matcher.
1579 if ($line =~ /^.\s*$Declare\s*$/) {
1580 ERROR("TEST: is type\n" . $herecurr);
1581 } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
1582 ERROR("TEST: is not type ($1 is)\n". $herecurr);
1586 # TEST: allow direct testing of the attribute matcher.
1588 if ($line =~ /^.\s*$Modifier\s*$/) {
1589 ERROR("TEST: is attr\n" . $herecurr);
1590 } elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
1591 ERROR("TEST: is not attr ($1 is)\n". $herecurr);
1596 # check for initialisation to aggregates open brace on the next line
1597 if ($prevline =~ /$Declare\s*$Ident\s*=\s*$/ &&
1598 $line =~ /^.\s*{/) {
1599 ERROR("that open brace { should be on the previous line\n" . $hereprev);
1603 # Checks which are anchored on the added line.
1606 # check for malformed paths in #include statements (uses RAW line)
1607 if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
1609 if ($path =~ m{//}) {
1610 ERROR("malformed #include filename\n" .
1615 # no C99 // comments
1616 if ($line =~ m{//}) {
1617 ERROR("do not use C99 // comments\n" . $herecurr);
1619 # Remove C99 comments.
1621 $opline =~ s@//.*@@;
1623 #EXPORT_SYMBOL should immediately follow its function closing }.
1624 if (($line =~ /EXPORT_SYMBOL.*\((.*)\)/) ||
1625 ($line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
1627 if ($prevline !~ /(?:
1629 ^.DEFINE_$Ident\(\Q$name\E\)|
1630 ^.DECLARE_$Ident\(\Q$name\E\)|
1631 ^.LIST_HEAD\(\Q$name\E\)|
1632 ^.$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
1633 \b\Q$name\E(?:\s+$Attribute)?\s*(?:;|=|\[)
1635 WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
1639 # check for external initialisers.
1640 if ($line =~ /^.$Type\s*$Ident\s*(?:\s+$Modifier)*\s*=\s*(0|NULL|false)\s*;/) {
1641 ERROR("do not initialise externals to 0 or NULL\n" .
1644 # check for static initialisers.
1645 if ($line =~ /\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
1646 ERROR("do not initialise statics to 0 or NULL\n" .
1650 # check for new typedefs, only function parameters and sparse annotations
1652 if ($line =~ /\btypedef\s/ &&
1653 $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
1654 $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
1655 $line !~ /\b$typeTypedefs\b/ &&
1656 $line !~ /\b__bitwise(?:__|)\b/) {
1657 WARN("do not add new typedefs\n" . $herecurr);
1660 # * goes on variable not on type
1662 if ($line =~ m{\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\)}) {
1663 my ($from, $to) = ($1, $1);
1665 # Should start with a space.
1666 $to =~ s/^(\S)/ $1/;
1667 # Should not end with a space.
1669 # '*'s should not have spaces between.
1670 while ($to =~ s/\*\s+\*/\*\*/) {
1673 #print "from<$from> to<$to>\n";
1675 ERROR("\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr);
1677 } elsif ($line =~ m{\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident)}) {
1678 my ($from, $to, $ident) = ($1, $1, $2);
1680 # Should start with a space.
1681 $to =~ s/^(\S)/ $1/;
1682 # Should not end with a space.
1684 # '*'s should not have spaces between.
1685 while ($to =~ s/\*\s+\*/\*\*/) {
1687 # Modifiers should have spaces.
1688 $to =~ s/(\b$Modifier$)/$1 /;
1690 #print "from<$from> to<$to> ident<$ident>\n";
1691 if ($from ne $to && $ident !~ /^$Modifier$/) {
1692 ERROR("\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr);
1696 # # no BUG() or BUG_ON()
1697 # if ($line =~ /\b(BUG|BUG_ON)\b/) {
1698 # print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
1699 # print "$herecurr";
1703 if ($line =~ /\bLINUX_VERSION_CODE\b/) {
1704 WARN("LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
1707 # printk should use KERN_* levels. Note that follow on printk's on the
1708 # same line do not need a level, so we use the current block context
1709 # to try and find and validate the current printk. In summary the current
1710 # printk includes all preceeding printk's which have no newline on the end.
1711 # we assume the first bad printk is the one to report.
1712 if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
1714 for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
1715 #print "CHECK<$lines[$ln - 1]\n";
1716 # we have a preceeding printk if it ends
1717 # with "\n" ignore it, else it is to blame
1718 if ($lines[$ln - 1] =~ m{\bprintk\(}) {
1719 if ($rawlines[$ln - 1] !~ m{\\n"}) {
1726 WARN("printk() should include KERN_ facility level\n" . $herecurr);
1730 # function brace can't be on same line, except for #defines of do while,
1731 # or if closed on same line
1732 if (($line=~/$Type\s*$Ident\(.*\).*\s{/) and
1733 !($line=~/\#\s*define.*do\s{/) and !($line=~/}/)) {
1734 ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
1737 # open braces for enum, union and struct go on the same line.
1738 if ($line =~ /^.\s*{/ &&
1739 $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
1740 ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
1743 # check for spacing round square brackets; allowed:
1744 # 1. with a type on the left -- int [] a;
1745 # 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
1746 # 3. inside a curly brace -- = { [0...10] = 5 }
1747 while ($line =~ /(.*?\s)\[/g) {
1748 my ($where, $prefix) = ($-[1], $1);
1749 if ($prefix !~ /$Type\s+$/ &&
1750 ($where != 0 || $prefix !~ /^.\s+$/) &&
1751 $prefix !~ /{\s+$/) {
1752 ERROR("space prohibited before open square bracket '['\n" . $herecurr);
1756 # check for spaces between functions and their parentheses.
1757 while ($line =~ /($Ident)\s+\(/g) {
1759 my $ctx_before = substr($line, 0, $-[1]);
1760 my $ctx = "$ctx_before$name";
1762 # Ignore those directives where spaces _are_ permitted.
1764 if|for|while|switch|return|case|
1765 volatile|__volatile__|
1766 __attribute__|format|__extension__|
1770 # cpp #define statements have non-optional spaces, ie
1771 # if there is a space between the name and the open
1772 # parenthesis it is simply not a parameter group.
1773 } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
1775 # cpp #elif statement condition may start with a (
1776 } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
1778 # If this whole things ends with a type its most
1779 # likely a typedef for a function.
1780 } elsif ($ctx =~ /$Type$/) {
1783 WARN("space prohibited between function name and open parenthesis '('\n" . $herecurr);
1786 # Check operator spacing.
1787 if (!($line=~/\#\s*include/)) {
1789 <<=|>>=|<=|>=|==|!=|
1790 \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
1791 =>|->|<<|>>|<|>|=|!|~|
1792 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
1795 my @elements = split(/($ops|;)/, $opline);
1798 my $blank = copy_spacing($opline);
1800 for (my $n = 0; $n < $#elements; $n += 2) {
1801 $off += length($elements[$n]);
1803 # Pick up the preceeding and succeeding characters.
1804 my $ca = substr($opline, 0, $off);
1806 if (length($opline) >= ($off + length($elements[$n + 1]))) {
1807 $cc = substr($opline, $off + length($elements[$n + 1]));
1809 my $cb = "$ca$;$cc";
1812 $a = 'V' if ($elements[$n] ne '');
1813 $a = 'W' if ($elements[$n] =~ /\s$/);
1814 $a = 'C' if ($elements[$n] =~ /$;$/);
1815 $a = 'B' if ($elements[$n] =~ /(\[|\()$/);
1816 $a = 'O' if ($elements[$n] eq '');
1817 $a = 'E' if ($ca =~ /^\s*$/);
1819 my $op = $elements[$n + 1];
1822 if (defined $elements[$n + 2]) {
1823 $c = 'V' if ($elements[$n + 2] ne '');
1824 $c = 'W' if ($elements[$n + 2] =~ /^\s/);
1825 $c = 'C' if ($elements[$n + 2] =~ /^$;/);
1826 $c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
1827 $c = 'O' if ($elements[$n + 2] eq '');
1828 $c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
1833 my $ctx = "${a}x${c}";
1835 my $at = "(ctx:$ctx)";
1837 my $ptr = substr($blank, 0, $off) . "^";
1838 my $hereptr = "$hereline$ptr\n";
1840 # Pull out the value of this operator.
1841 my $op_type = substr($curr_values, $off + 1, 1);
1843 # Get the full operator variant.
1844 my $opv = $op . substr($curr_vars, $off, 1);
1846 # Ignore operators passed as parameters.
1847 if ($op_type ne 'V' &&
1848 $ca =~ /\s$/ && $cc =~ /^\s*,/) {
1851 # } elsif ($op =~ /^$;+$/) {
1853 # ; should have either the end of line or a space or \ after it
1854 } elsif ($op eq ';') {
1855 if ($ctx !~ /.x[WEBC]/ &&
1856 $cc !~ /^\\/ && $cc !~ /^;/) {
1857 ERROR("space required after that '$op' $at\n" . $hereptr);
1861 } elsif ($op eq '//') {
1865 # : when part of a bitfield
1866 } elsif ($op eq '->' || $opv eq ':B') {
1867 if ($ctx =~ /Wx.|.xW/) {
1868 ERROR("spaces prohibited around that '$op' $at\n" . $hereptr);
1871 # , must have a space on the right.
1872 } elsif ($op eq ',') {
1873 if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
1874 ERROR("space required after that '$op' $at\n" . $hereptr);
1877 # '*' as part of a type definition -- reported already.
1878 } elsif ($opv eq '*_') {
1879 #warn "'*' is part of type\n";
1881 # unary operators should have a space before and
1882 # none after. May be left adjacent to another
1883 # unary operator, or a cast
1884 } elsif ($op eq '!' || $op eq '~' ||
1885 $opv eq '*U' || $opv eq '-U' ||
1886 $opv eq '&U' || $opv eq '&&U') {
1887 if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
1888 ERROR("space required before that '$op' $at\n" . $hereptr);
1890 if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
1891 # A unary '*' may be const
1893 } elsif ($ctx =~ /.xW/) {
1894 ERROR("Aspace prohibited after that '$op' $at\n" . $hereptr);
1897 # unary ++ and unary -- are allowed no space on one side.
1898 } elsif ($op eq '++' or $op eq '--') {
1899 if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
1900 ERROR("space required one side of that '$op' $at\n" . $hereptr);
1902 if ($ctx =~ /Wx[BE]/ ||
1903 ($ctx =~ /Wx./ && $cc =~ /^;/)) {
1904 ERROR("space prohibited before that '$op' $at\n" . $hereptr);
1906 if ($ctx =~ /ExW/) {
1907 ERROR("space prohibited after that '$op' $at\n" . $hereptr);
1911 # << and >> may either have or not have spaces both sides
1912 } elsif ($op eq '<<' or $op eq '>>' or
1913 $op eq '&' or $op eq '^' or $op eq '|' or
1914 $op eq '+' or $op eq '-' or
1915 $op eq '*' or $op eq '/' or
1918 if ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
1919 ERROR("need consistent spacing around '$op' $at\n" .
1923 # A colon needs no spaces before when it is
1924 # terminating a case value or a label.
1925 } elsif ($opv eq ':C' || $opv eq ':L') {
1926 if ($ctx =~ /Wx./) {
1927 ERROR("space prohibited before that '$op' $at\n" . $hereptr);
1930 # All the others need spaces both sides.
1931 } elsif ($ctx !~ /[EWC]x[CWE]/) {
1934 # Ignore email addresses <foo@bar>
1936 $cc =~ /^\S+\@\S+>/) ||
1938 $ca =~ /<\S+\@\S+$/))
1944 if (($opv eq ':O' && $ca =~ /\?$/) ||
1945 ($op eq '?' && $cc =~ /^:/)) {
1950 ERROR("spaces required around that '$op' $at\n" . $hereptr);
1953 $off += length($elements[$n + 1]);
1957 # check for multiple assignments
1958 if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
1959 CHK("multiple assignments should be avoided\n" . $herecurr);
1962 ## # check for multiple declarations, allowing for a function declaration
1964 ## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
1965 ## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
1967 ## # Remove any bracketed sections to ensure we do not
1968 ## # falsly report the parameters of functions.
1970 ## while ($ln =~ s/\([^\(\)]*\)//g) {
1972 ## if ($ln =~ /,/) {
1973 ## WARN("declaring multiple variables together should be avoided\n" . $herecurr);
1977 #need space before brace following if, while, etc
1978 if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
1980 ERROR("space required before the open brace '{'\n" . $herecurr);
1983 # closing brace should have a space following it when it has anything
1985 if ($line =~ /}(?!(?:,|;|\)))\S/) {
1986 ERROR("space required after that close brace '}'\n" . $herecurr);
1989 # check spacing on square brackets
1990 if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
1991 ERROR("space prohibited after that open square bracket '['\n" . $herecurr);
1993 if ($line =~ /\s\]/) {
1994 ERROR("space prohibited before that close square bracket ']'\n" . $herecurr);
1997 # check spacing on parentheses
1998 if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
1999 $line !~ /for\s*\(\s+;/) {
2000 ERROR("space prohibited after that open parenthesis '('\n" . $herecurr);
2002 if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
2003 $line !~ /for\s*\(.*;\s+\)/ &&
2004 $line !~ /:\s+\)/) {
2005 ERROR("space prohibited before that close parenthesis ')'\n" . $herecurr);
2008 #goto labels aren't indented, allow a single space however
2009 if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
2010 !($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
2011 WARN("labels should not be indented\n" . $herecurr);
2014 # Return is not a function.
2015 if (defined($stat) && $stat =~ /^.\s*return(\s*)(\(.*);/s) {
2019 # Flatten any parentheses
2020 $value =~ s/\)\(/\) \(/g;
2021 while ($value =~ s/\[[^\{\}]*\]/1/ ||
2022 $value !~ /(?:$Ident|-?$Constant)\s*
2024 (?:$Ident|-?$Constant)/x &&
2025 $value =~ s/\([^\(\)]*\)/1/) {
2028 if ($value =~ /^(?:$Ident|-?$Constant)$/) {
2029 ERROR("return is not a function, parentheses are not required\n" . $herecurr);
2031 } elsif ($spacing !~ /\s+/) {
2032 ERROR("space required before the open parenthesis '('\n" . $herecurr);
2036 # Need a space before open parenthesis after if, while etc
2037 if ($line=~/\b(if|while|for|switch)\(/) {
2038 ERROR("space required before the open parenthesis '('\n" . $herecurr);
2041 # Check for illegal assignment in if conditional -- and check for trailing
2042 # statements after the conditional.
2043 if ($line =~ /do\s*(?!{)/) {
2044 my ($stat_next) = ctx_statement_block($line_nr_next,
2045 $remain_next, $off_next);
2046 $stat_next =~ s/\n./\n /g;
2047 ##print "stat<$stat> stat_next<$stat_next>\n";
2049 if ($stat_next =~ /^\s*while\b/) {
2050 # If the statement carries leading newlines,
2051 # then count those as offsets.
2053 ($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
2055 statement_rawlines($whitespace) - 1;
2057 $suppress_whiletrailers{$line_nr_next +
2061 if (!defined $suppress_whiletrailers{$linenr} &&
2062 $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
2063 my ($s, $c) = ($stat, $cond);
2065 if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
2066 ERROR("do not use assignment in if condition\n" . $herecurr);
2069 # Find out what is on the end of the line after the
2071 substr($s, 0, length($c), '');
2073 $s =~ s/$;//g; # Remove any comments
2074 if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
2075 $c !~ /}\s*while\s*/)
2077 # Find out how long the conditional actually is.
2078 my @newlines = ($c =~ /\n/gs);
2079 my $cond_lines = 1 + $#newlines;
2081 my $stat_real = raw_line($linenr, $cond_lines);
2082 if (defined($stat_real) && $cond_lines > 1) {
2083 $stat_real = "[...]\n$stat_real";
2086 ERROR("trailing statements should be on next line\n" . $herecurr . $stat_real);
2090 # Check for bitwise tests written as boolean
2102 WARN("boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
2105 # if and else should not have general statements after it
2106 if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
2108 $s =~ s/$;//g; # Remove any comments
2109 if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
2110 ERROR("trailing statements should be on next line\n" . $herecurr);
2113 # if should not continue a brace
2114 if ($line =~ /}\s*if\b/) {
2115 ERROR("trailing statements should be on next line\n" .
2118 # case and default should not have general statements after them
2119 if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
2121 (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
2125 ERROR("trailing statements should be on next line\n" . $herecurr);
2128 # Check for }<nl>else {, these must be at the same
2129 # indent level to be relevant to each other.
2130 if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
2131 $previndent == $indent) {
2132 ERROR("else should follow close brace '}'\n" . $hereprev);
2135 if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ and
2136 $previndent == $indent) {
2137 my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
2139 # Find out what is on the end of the line after the
2141 substr($s, 0, length($c), '');
2144 if ($s =~ /^\s*;/) {
2145 ERROR("while should follow close brace '}'\n" . $hereprev);
2149 #studly caps, commented out until figure out how to distinguish between use of existing and adding new
2150 # if (($line=~/[\w_][a-z\d]+[A-Z]/) and !($line=~/print/)) {
2151 # print "No studly caps, use _\n";
2152 # print "$herecurr";
2156 #no spaces allowed after \ in define
2157 if ($line=~/\#\s*define.*\\\s$/) {
2158 WARN("Whitepspace after \\ makes next lines useless\n" . $herecurr);
2161 #warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
2162 if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
2164 my $checkfile = "include/linux/$file";
2165 if (-f "$root/$checkfile" &&
2166 $realfile ne $checkfile &&
2169 if ($realfile =~ m{^arch/}) {
2170 CHK("Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
2172 WARN("Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
2177 # multi-statement macros should be enclosed in a do while loop, grab the
2178 # first statement and ensure its the whole macro if its not enclosed
2179 # in a known good container
2180 if ($realfile !~ m@/vmlinux.lds.h$@ &&
2181 $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
2184 my ($off, $dstat, $dcond, $rest);
2187 my $args = defined($1);
2189 # Find the end of the macro and limit our statement
2191 while ($cnt > 0 && defined $lines[$ln - 1] &&
2192 $lines[$ln - 1] =~ /^(?:-|..*\\$)/)
2194 $ctx .= $rawlines[$ln - 1] . "\n";
2195 $cnt-- if ($lines[$ln - 1] !~ /^-/);
2198 $ctx .= $rawlines[$ln - 1];
2200 ($dstat, $dcond, $ln, $cnt, $off) =
2201 ctx_statement_block($linenr, $ln - $linenr + 1, 0);
2202 #print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
2203 #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
2205 # Extract the remainder of the define (if any) and
2206 # rip off surrounding spaces, and trailing \'s.
2208 while ($off != 0 || ($cnt > 0 && $rest =~ /\\\s*$/)) {
2209 #print "ADDING cnt<$cnt> $off <" . substr($lines[$ln - 1], $off) . "> rest<$rest>\n";
2210 if ($off != 0 || $lines[$ln - 1] !~ /^-/) {
2211 $rest .= substr($lines[$ln - 1], $off) . "\n";
2217 $rest =~ s/\\\n.//g;
2221 # Clean up the original statement.
2223 substr($dstat, 0, length($dcond), '');
2225 $dstat =~ s/^.\s*\#\s*define\s+$Ident\s*//;
2228 $dstat =~ s/\\\n.//g;
2229 $dstat =~ s/^\s*//s;
2230 $dstat =~ s/\s*$//s;
2232 # Flatten any parentheses and braces
2233 while ($dstat =~ s/\([^\(\)]*\)/1/ ||
2234 $dstat =~ s/\{[^\{\}]*\}/1/ ||
2235 $dstat =~ s/\[[^\{\}]*\]/1/)
2239 my $exceptions = qr{
2248 #print "REST<$rest> dstat<$dstat>\n";
2250 if ($rest !~ /while\s*\(/ &&
2251 $dstat !~ /$exceptions/)
2253 ERROR("Macros with multiple statements should be enclosed in a do - while loop\n" . "$here\n$ctx\n");
2256 } elsif ($ctx !~ /;/) {
2258 $dstat !~ /^(?:$Ident|-?$Constant)$/ &&
2259 $dstat !~ /$exceptions/ &&
2260 $dstat !~ /^\.$Ident\s*=/ &&
2261 $dstat =~ /$Operators/)
2263 ERROR("Macros with complex values should be enclosed in parenthesis\n" . "$here\n$ctx\n");
2268 # make sure symbols are always wrapped with VMLINUX_SYMBOL() ...
2269 # all assignments may have only one of the following with an assignment:
2272 # VMLINUX_SYMBOL(...)
2273 if ($realfile eq 'vmlinux.lds.h' && $line =~ /(?:(?:^|\s)$Ident\s*=|=\s*$Ident(?:\s|$))/) {
2274 WARN("vmlinux.lds.h needs VMLINUX_SYMBOL() around C-visible symbols\n" . $herecurr);
2277 # check for redundant bracing round if etc
2278 if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
2279 my ($level, $endln, @chunks) =
2280 ctx_statement_full($linenr, $realcnt, 1);
2281 #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
2282 #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
2283 if ($#chunks > 0 && $level == 0) {
2286 my $herectx = $here . "\n";
2287 my $ln = $linenr - 1;
2288 for my $chunk (@chunks) {
2289 my ($cond, $block) = @{$chunk};
2291 # If the condition carries leading newlines, then count those as offsets.
2292 my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
2293 my $offset = statement_rawlines($whitespace) - 1;
2295 #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
2297 # We have looked at and allowed this specific line.
2298 $suppress_ifbraces{$ln + $offset} = 1;
2300 $herectx .= "$rawlines[$ln + $offset]\n[...]\n";
2301 $ln += statement_rawlines($block) - 1;
2303 substr($block, 0, length($cond), '');
2305 $seen++ if ($block =~ /^\s*{/);
2307 #print "cond<$cond> block<$block> allowed<$allowed>\n";
2308 if (statement_lines($cond) > 1) {
2309 #print "APW: ALLOWED: cond<$cond>\n";
2312 if ($block =~/\b(?:if|for|while)\b/) {
2313 #print "APW: ALLOWED: block<$block>\n";
2316 if (statement_block_size($block) > 1) {
2317 #print "APW: ALLOWED: lines block<$block>\n";
2321 if ($seen && !$allowed) {
2322 WARN("braces {} are not necessary for any arm of this statement\n" . $herectx);
2326 if (!defined $suppress_ifbraces{$linenr - 1} &&
2327 $line =~ /\b(if|while|for|else)\b/) {
2330 # Check the pre-context.
2331 if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
2332 #print "APW: ALLOWED: pre<$1>\n";
2336 my ($level, $endln, @chunks) =
2337 ctx_statement_full($linenr, $realcnt, $-[0]);
2339 # Check the condition.
2340 my ($cond, $block) = @{$chunks[0]};
2341 #print "CHECKING<$linenr> cond<$cond> block<$block>\n";
2342 if (defined $cond) {
2343 substr($block, 0, length($cond), '');
2345 if (statement_lines($cond) > 1) {
2346 #print "APW: ALLOWED: cond<$cond>\n";
2349 if ($block =~/\b(?:if|for|while)\b/) {
2350 #print "APW: ALLOWED: block<$block>\n";
2353 if (statement_block_size($block) > 1) {
2354 #print "APW: ALLOWED: lines block<$block>\n";
2357 # Check the post-context.
2358 if (defined $chunks[1]) {
2359 my ($cond, $block) = @{$chunks[1]};
2360 if (defined $cond) {
2361 substr($block, 0, length($cond), '');
2363 if ($block =~ /^\s*\{/) {
2364 #print "APW: ALLOWED: chunk-1 block<$block>\n";
2368 if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
2369 my $herectx = $here . "\n";;
2370 my $cnt = statement_rawlines($block);
2372 for (my $n = 0; $n < $cnt; $n++) {
2373 $herectx .= raw_line($linenr, $n) . "\n";;
2376 WARN("braces {} are not necessary for single statement blocks\n" . $herectx);
2380 # don't include deprecated include files (uses RAW line)
2381 for my $inc (@dep_includes) {
2382 if ($rawline =~ m@^.\s*\#\s*include\s*\<$inc>@) {
2383 ERROR("Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n" . $herecurr);
2387 # don't use deprecated functions
2388 for my $func (@dep_functions) {
2389 if ($line =~ /\b$func\b/) {
2390 ERROR("Don't use $func(): see Documentation/feature-removal-schedule.txt\n" . $herecurr);
2394 # no volatiles please
2395 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
2396 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
2397 WARN("Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
2400 # SPIN_LOCK_UNLOCKED & RW_LOCK_UNLOCKED are deprecated
2401 if ($line =~ /\b(SPIN_LOCK_UNLOCKED|RW_LOCK_UNLOCKED)/) {
2402 ERROR("Use of $1 is deprecated: see Documentation/spinlocks.txt\n" . $herecurr);
2406 if ($line =~ /^.\s*\#\s*if\s+0\b/) {
2407 CHK("if this code is redundant consider removing it\n" .
2411 # check for needless kfree() checks
2412 if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
2414 if ($line =~ /\bkfree\(\Q$expr\E\);/) {
2415 WARN("kfree(NULL) is safe this check is probably not required\n" . $hereprev);
2418 # check for needless usb_free_urb() checks
2419 if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
2421 if ($line =~ /\busb_free_urb\(\Q$expr\E\);/) {
2422 WARN("usb_free_urb(NULL) is safe this check is probably not required\n" . $hereprev);
2426 # warn about #ifdefs in C files
2427 # if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
2428 # print "#ifdef in C files should be avoided\n";
2429 # print "$herecurr";
2433 # warn about spacing in #ifdefs
2434 if ($line =~ /^.\s*\#\s*(ifdef|ifndef|elif)\s\s+/) {
2435 ERROR("exactly one space required after that #$1\n" . $herecurr);
2438 # check for spinlock_t definitions without a comment.
2439 if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ ||
2440 $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
2442 if (!ctx_has_comment($first_line, $linenr)) {
2443 CHK("$1 definition without comment\n" . $herecurr);
2446 # check for memory barriers without a comment.
2447 if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
2448 if (!ctx_has_comment($first_line, $linenr)) {
2449 CHK("memory barrier without comment\n" . $herecurr);
2452 # check of hardware specific defines
2453 if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
2454 CHK("architecture specific defines should be avoided\n" . $herecurr);
2457 # check the location of the inline attribute, that it is between
2458 # storage class and type.
2459 if ($line =~ /\b$Type\s+$Inline\b/ ||
2460 $line =~ /\b$Inline\s+$Storage\b/) {
2461 ERROR("inline keyword should sit between storage class and type\n" . $herecurr);
2464 # Check for __inline__ and __inline, prefer inline
2465 if ($line =~ /\b(__inline__|__inline)\b/) {
2466 WARN("plain inline is preferred over $1\n" . $herecurr);
2469 # check for new externs in .c files.
2470 if ($realfile =~ /\.c$/ && defined $stat &&
2471 $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
2473 my $function_name = $1;
2474 my $paren_space = $2;
2477 if (defined $cond) {
2478 substr($s, 0, length($cond), '');
2480 if ($s =~ /^\s*;/ &&
2481 $function_name ne 'uninitialized_var')
2483 WARN("externs should be avoided in .c files\n" . $herecurr);
2486 if ($paren_space =~ /\n/) {
2487 WARN("arguments for function declarations should follow identifier\n" . $herecurr);
2490 } elsif ($realfile =~ /\.c$/ && defined $stat &&
2491 $stat =~ /^.\s*extern\s+/)
2493 WARN("externs should be avoided in .c files\n" . $herecurr);
2496 # checks for new __setup's
2497 if ($rawline =~ /\b__setup\("([^"]*)"/) {
2500 if (!grep(/$name/, @setup_docs)) {
2501 CHK("__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
2505 # check for pointless casting of kmalloc return
2506 if ($line =~ /\*\s*\)\s*k[czm]alloc\b/) {
2507 WARN("unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
2510 # check for gcc specific __FUNCTION__
2511 if ($line =~ /__FUNCTION__/) {
2512 WARN("__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr);
2515 # check for semaphores used as mutexes
2516 if ($line =~ /^.\s*(DECLARE_MUTEX|init_MUTEX)\s*\(/) {
2517 WARN("mutexes are preferred for single holder semaphores\n" . $herecurr);
2519 # check for semaphores used as mutexes
2520 if ($line =~ /^.\s*init_MUTEX_LOCKED\s*\(/) {
2521 WARN("consider using a completion\n" . $herecurr);
2523 # recommend strict_strto* over simple_strto*
2524 if ($line =~ /\bsimple_(strto.*?)\s*\(/) {
2525 WARN("consider using strict_$1 in preference to simple_$1\n" . $herecurr);
2527 # check for __initcall(), use device_initcall() explicitly please
2528 if ($line =~ /^.\s*__initcall\s*\(/) {
2529 WARN("please use device_initcall() instead of __initcall()\n" . $herecurr);
2531 # check for struct file_operations, ensure they are const.
2532 if ($line !~ /\bconst\b/ &&
2533 $line =~ /\bstruct\s+(file_operations|seq_operations)\b/) {
2534 WARN("struct $1 should normally be const\n" .
2538 # use of NR_CPUS is usually wrong
2539 # ignore definitions of NR_CPUS and usage to define arrays as likely right
2540 if ($line =~ /\bNR_CPUS\b/ &&
2541 $line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ &&
2542 $line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ &&
2543 $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
2544 $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
2545 $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/)
2547 WARN("usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
2550 # check for %L{u,d,i} in strings
2552 while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
2553 $string = substr($rawline, $-[1], $+[1] - $-[1]);
2554 $string =~ s/%%/__/g;
2555 if ($string =~ /(?<!%)%L[udi]/) {
2556 WARN("\%Ld/%Lu are not-standard C, use %lld/%llu\n" . $herecurr);
2561 # whine mightly about in_atomic
2562 if ($line =~ /\bin_atomic\s*\(/) {
2563 if ($realfile =~ m@^drivers/@) {
2564 ERROR("do not use in_atomic in drivers\n" . $herecurr);
2565 } elsif ($realfile !~ m@^kernel/@) {
2566 WARN("use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
2571 # If we have no input at all, then there is nothing to report on
2572 # so just keep quiet.
2573 if ($#rawlines == -1) {
2577 # In mailback mode only produce a report in the negative, for
2578 # things that appear to be patches.
2579 if ($mailback && ($clean == 1 || !$is_patch)) {
2583 # This is not a patch, and we are are in 'no-patch' mode so
2585 if (!$chk_patch && !$is_patch) {
2590 ERROR("Does not appear to be a unified-diff format patch\n");
2592 if ($is_patch && $chk_signoff && $signoff == 0) {
2593 ERROR("Missing Signed-off-by: line(s)\n");
2596 print report_dump();
2597 if ($summary && !($clean == 1 && $quiet == 1)) {
2598 print "$filename " if ($summary_file);
2599 print "total: $cnt_error errors, $cnt_warn warnings, " .
2600 (($check)? "$cnt_chk checks, " : "") .
2601 "$cnt_lines lines checked\n";
2602 print "\n" if ($quiet == 0);
2605 if ($clean == 1 && $quiet == 0) {
2606 print "$vname has no obvious style problems and is ready for submission.\n"
2608 if ($clean == 0 && $quiet == 0) {
2609 print "$vname has style problems, please review. If any of these errors\n";
2610 print "are false positives report them to the maintainer, see\n";
2611 print "CHECKPATCH in MAINTAINERS.\n";