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};
119 __(?:mem|cpu|dev|)(?:initdata|init)|
120 ____cacheline_aligned|
121 ____cacheline_aligned_in_smp|
122 ____cacheline_internodealigned_in_smp|
126 our $Inline = qr{inline|__always_inline|noinline};
127 our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
128 our $Lval = qr{$Ident(?:$Member)*};
130 our $Constant = qr{(?:[0-9]+|0x[0-9a-fA-F]+)[UL]*};
131 our $Assignment = qr{(?:\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=)};
132 our $Compare = qr{<=|>=|==|!=|<|>};
136 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%
144 [\x09\x0A\x0D\x20-\x7E] # ASCII
145 | [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
146 | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
147 | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
148 | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
149 | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
150 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
151 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
154 our $typeTypedefs = qr{(?x:
155 (?:__)?(?:u|s|be|le)(?:\d|\d\d)|
161 qr{(?:unsigned\s+)?char},
162 qr{(?:unsigned\s+)?short},
163 qr{(?:unsigned\s+)?int},
164 qr{(?:unsigned\s+)?long},
165 qr{(?:unsigned\s+)?long\s+int},
166 qr{(?:unsigned\s+)?long\s+long},
167 qr{(?:unsigned\s+)?long\s+long\s+int},
176 qr{${Ident}_handler},
177 qr{${Ident}_handler_fn},
179 our @modifierList = (
184 my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)";
185 my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)";
186 $Modifier = qr{(?:$Attribute|$Sparse|$mods)};
188 (?:$Modifier\s+|const\s+)*
190 (?:typeof|__typeof__)\s*\(\s*\**\s*$Ident\s*\)|
194 (?:\s+$Modifier|\s+const)*
198 (?:[\s\*]+\s*const|[\s\*]+|(?:\s*\[\s*\])+)?
199 (?:\s+$Inline|\s+$Modifier)*
201 $Declare = qr{(?:$Storage\s+)?$Type};
205 $chk_signoff = 0 if ($file);
207 my @dep_includes = ();
208 my @dep_functions = ();
209 my $removal = "Documentation/feature-removal-schedule.txt";
210 if ($tree && -f "$root/$removal") {
211 open(my $REMOVE, '<', "$root/$removal") ||
212 die "$P: $removal: open failed - $!\n";
214 if (/^Check:\s+(.*\S)/) {
215 for my $entry (split(/[, ]+/, $1)) {
216 if ($entry =~ m@include/(.*)@) {
217 push(@dep_includes, $1);
219 } elsif ($entry !~ m@/@) {
220 push(@dep_functions, $entry);
231 for my $filename (@ARGV) {
234 open($FILE, '-|', "diff -u /dev/null $filename") ||
235 die "$P: $filename: diff failed - $!\n";
236 } elsif ($filename eq '-') {
237 open($FILE, '<&STDIN');
239 open($FILE, '<', "$filename") ||
240 die "$P: $filename: open failed - $!\n";
242 if ($filename eq '-') {
243 $vname = 'Your patch';
252 if (!process($filename)) {
261 sub top_of_kernel_tree {
265 "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
266 "README", "Documentation", "arch", "include", "drivers",
267 "fs", "init", "ipc", "kernel", "lib", "scripts",
270 foreach my $check (@tree_check) {
271 if (! -e $root . '/' . $check) {
283 for my $c (split(//, $str)) {
287 for (; ($n % 8) != 0; $n++) {
299 (my $res = shift) =~ tr/\t/ /c;
306 # Drop the diff line leader and expand tabs
308 $line = expand_tabs($line);
310 # Pick the indent from the front of the line.
311 my ($white) = ($line =~ /^(\s*)/);
313 return (length($line), length($white));
316 my $sanitise_quote = '';
318 sub sanitise_line_reset {
319 my ($in_comment) = @_;
322 $sanitise_quote = '*/';
324 $sanitise_quote = '';
337 # Always copy over the diff marker.
338 $res = substr($line, 0, 1);
340 for ($off = 1; $off < length($line); $off++) {
341 $c = substr($line, $off, 1);
343 # Comments we are wacking completly including the begin
344 # and end, all to $;.
345 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
346 $sanitise_quote = '*/';
348 substr($res, $off, 2, "$;$;");
352 if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
353 $sanitise_quote = '';
354 substr($res, $off, 2, "$;$;");
359 # A \ in a string means ignore the next character.
360 if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
362 substr($res, $off, 2, 'XX');
367 if ($c eq "'" || $c eq '"') {
368 if ($sanitise_quote eq '') {
369 $sanitise_quote = $c;
371 substr($res, $off, 1, $c);
373 } elsif ($sanitise_quote eq $c) {
374 $sanitise_quote = '';
378 #print "c<$c> SQ<$sanitise_quote>\n";
379 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
380 substr($res, $off, 1, $;);
381 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
382 substr($res, $off, 1, 'X');
384 substr($res, $off, 1, $c);
388 # The pathname on a #include may be surrounded by '<' and '>'.
389 if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
390 my $clean = 'X' x length($1);
391 $res =~ s@\<.*\>@<$clean>@;
393 # The whole of a #error is a string.
394 } elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
395 my $clean = 'X' x length($1);
396 $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
402 sub ctx_statement_block {
403 my ($linenr, $remain, $off) = @_;
404 my $line = $linenr - 1;
421 @stack = (['', 0]) if ($#stack == -1);
423 #warn "CSB: blk<$blk> remain<$remain>\n";
424 # If we are about to drop off the end, pull in more
427 for (; $remain > 0; $line++) {
428 last if (!defined $lines[$line]);
429 next if ($lines[$line] =~ /^-/);
432 $blk .= $lines[$line] . "\n";
437 # Bail if there is no further context.
438 #warn "CSB: blk<$blk> off<$off> len<$len>\n";
444 $c = substr($blk, $off, 1);
445 $remainder = substr($blk, $off);
447 #warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
449 # Handle nested #if/#else.
450 if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
451 push(@stack, [ $type, $level ]);
452 } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
453 ($type, $level) = @{$stack[$#stack - 1]};
454 } elsif ($remainder =~ /^#\s*endif\b/) {
455 ($type, $level) = @{pop(@stack)};
458 # Statement ends at the ';' or a close '}' at the
460 if ($level == 0 && $c eq ';') {
464 # An else is really a conditional as long as its not else if
465 if ($level == 0 && $coff_set == 0 &&
466 (!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
467 $remainder =~ /^(else)(?:\s|{)/ &&
468 $remainder !~ /^else\s+if\b/) {
469 $coff = $off + length($1) - 1;
471 #warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
472 #warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
475 if (($type eq '' || $type eq '(') && $c eq '(') {
479 if ($type eq '(' && $c eq ')') {
481 $type = ($level != 0)? '(' : '';
483 if ($level == 0 && $coff < $soff) {
486 #warn "CSB: mark coff<$coff>\n";
489 if (($type eq '' || $type eq '{') && $c eq '{') {
493 if ($type eq '{' && $c eq '}') {
495 $type = ($level != 0)? '{' : '';
503 # We are truly at the end, so shuffle to the next line.
510 my $statement = substr($blk, $soff, $off - $soff + 1);
511 my $condition = substr($blk, $soff, $coff - $soff + 1);
513 #warn "STATEMENT<$statement>\n";
514 #warn "CONDITION<$condition>\n";
516 #print "coff<$coff> soff<$off> loff<$loff>\n";
518 return ($statement, $condition,
519 $line, $remain + 1, $off - $loff + 1, $level);
522 sub statement_lines {
525 # Strip the diff line prefixes and rip blank lines at start and end.
526 $stmt =~ s/(^|\n)./$1/g;
530 my @stmt_lines = ($stmt =~ /\n/g);
532 return $#stmt_lines + 2;
535 sub statement_rawlines {
538 my @stmt_lines = ($stmt =~ /\n/g);
540 return $#stmt_lines + 2;
543 sub statement_block_size {
546 $stmt =~ s/(^|\n)./$1/g;
552 my @stmt_lines = ($stmt =~ /\n/g);
553 my @stmt_statements = ($stmt =~ /;/g);
555 my $stmt_lines = $#stmt_lines + 2;
556 my $stmt_statements = $#stmt_statements + 1;
558 if ($stmt_lines > $stmt_statements) {
561 return $stmt_statements;
565 sub ctx_statement_full {
566 my ($linenr, $remain, $off) = @_;
567 my ($statement, $condition, $level);
571 # Grab the first conditional/block pair.
572 ($statement, $condition, $linenr, $remain, $off, $level) =
573 ctx_statement_block($linenr, $remain, $off);
574 #print "F: c<$condition> s<$statement> remain<$remain>\n";
575 push(@chunks, [ $condition, $statement ]);
576 if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
577 return ($level, $linenr, @chunks);
580 # Pull in the following conditional/block pairs and see if they
581 # could continue the statement.
583 ($statement, $condition, $linenr, $remain, $off, $level) =
584 ctx_statement_block($linenr, $remain, $off);
585 #print "C: c<$condition> s<$statement> remain<$remain>\n";
586 last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
588 push(@chunks, [ $condition, $statement ]);
591 return ($level, $linenr, @chunks);
595 my ($linenr, $remain, $outer, $open, $close, $off) = @_;
597 my $start = $linenr - 1;
604 my @stack = ($level);
605 for ($line = $start; $remain > 0; $line++) {
606 next if ($rawlines[$line] =~ /^-/);
609 $blk .= $rawlines[$line];
611 # Handle nested #if/#else.
612 if ($rawlines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
613 push(@stack, $level);
614 } elsif ($rawlines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
615 $level = $stack[$#stack - 1];
616 } elsif ($rawlines[$line] =~ /^.\s*#\s*endif\b/) {
617 $level = pop(@stack);
620 foreach my $c (split(//, $rawlines[$line])) {
621 ##print "C<$c>L<$level><$open$close>O<$off>\n";
627 if ($c eq $close && $level > 0) {
629 last if ($level == 0);
630 } elsif ($c eq $open) {
635 if (!$outer || $level <= 1) {
636 push(@res, $rawlines[$line]);
639 last if ($level == 0);
642 return ($level, @res);
644 sub ctx_block_outer {
645 my ($linenr, $remain) = @_;
647 my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
651 my ($linenr, $remain) = @_;
653 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
657 my ($linenr, $remain, $off) = @_;
659 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
662 sub ctx_block_level {
663 my ($linenr, $remain) = @_;
665 return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
667 sub ctx_statement_level {
668 my ($linenr, $remain, $off) = @_;
670 return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
673 sub ctx_locate_comment {
674 my ($first_line, $end_line) = @_;
676 # Catch a comment on the end of the line itself.
677 my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@);
678 return $current_comment if (defined $current_comment);
680 # Look through the context and try and figure out if there is a
683 $current_comment = '';
684 for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
685 my $line = $rawlines[$linenr - 1];
687 if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
690 if ($line =~ m@/\*@) {
693 if (!$in_comment && $current_comment ne '') {
694 $current_comment = '';
696 $current_comment .= $line . "\n" if ($in_comment);
697 if ($line =~ m@\*/@) {
702 chomp($current_comment);
703 return($current_comment);
705 sub ctx_has_comment {
706 my ($first_line, $end_line) = @_;
707 my $cmt = ctx_locate_comment($first_line, $end_line);
709 ##print "LINE: $rawlines[$end_line - 1 ]\n";
710 ##print "CMMT: $cmt\n";
716 my ($linenr, $cnt) = @_;
718 my $offset = $linenr - 1;
723 $line = $rawlines[$offset++];
724 next if (defined($line) && $line =~ /^-/);
736 while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
739 $coded = sprintf("^%c", unpack('C', $2) + 64);
748 my $av_preprocessor = 0;
754 $av_preprocessor = 0;
756 @av_paren_type = ('E');
757 $av_pend_colon = 'O';
760 sub annotate_values {
761 my ($stream, $type) = @_;
764 my $var = '_' x length($stream);
767 print "$stream\n" if ($dbg_values > 1);
769 while (length($cur)) {
770 @av_paren_type = ('E') if ($#av_paren_type < 0);
771 print " <" . join('', @av_paren_type) .
772 "> <$type> <$av_pending>" if ($dbg_values > 1);
773 if ($cur =~ /^(\s+)/o) {
774 print "WS($1)\n" if ($dbg_values > 1);
775 if ($1 =~ /\n/ && $av_preprocessor) {
776 $type = pop(@av_paren_type);
777 $av_preprocessor = 0;
780 } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\()/) {
781 print "DECLARE($1)\n" if ($dbg_values > 1);
784 } elsif ($cur =~ /^($Modifier)\s*/) {
785 print "MODIFIER($1)\n" if ($dbg_values > 1);
788 } elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) {
789 print "DEFINE($1,$2)\n" if ($dbg_values > 1);
790 $av_preprocessor = 1;
791 push(@av_paren_type, $type);
797 } elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) {
798 print "UNDEF($1)\n" if ($dbg_values > 1);
799 $av_preprocessor = 1;
800 push(@av_paren_type, $type);
802 } elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) {
803 print "PRE_START($1)\n" if ($dbg_values > 1);
804 $av_preprocessor = 1;
806 push(@av_paren_type, $type);
807 push(@av_paren_type, $type);
810 } elsif ($cur =~ /^(\#\s*(?:else|elif))/o) {
811 print "PRE_RESTART($1)\n" if ($dbg_values > 1);
812 $av_preprocessor = 1;
814 push(@av_paren_type, $av_paren_type[$#av_paren_type]);
818 } elsif ($cur =~ /^(\#\s*(?:endif))/o) {
819 print "PRE_END($1)\n" if ($dbg_values > 1);
821 $av_preprocessor = 1;
823 # Assume all arms of the conditional end as this
824 # one does, and continue as if the #endif was not here.
826 push(@av_paren_type, $type);
829 } elsif ($cur =~ /^(\\\n)/o) {
830 print "PRECONT($1)\n" if ($dbg_values > 1);
832 } elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
833 print "ATTR($1)\n" if ($dbg_values > 1);
837 } elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
838 print "SIZEOF($1)\n" if ($dbg_values > 1);
844 } elsif ($cur =~ /^(if|while|for)\b/o) {
845 print "COND($1)\n" if ($dbg_values > 1);
849 } elsif ($cur =~/^(case)/o) {
850 print "CASE($1)\n" if ($dbg_values > 1);
851 $av_pend_colon = 'C';
854 } elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) {
855 print "KEYWORD($1)\n" if ($dbg_values > 1);
858 } elsif ($cur =~ /^(\()/o) {
859 print "PAREN('$1')\n" if ($dbg_values > 1);
860 push(@av_paren_type, $av_pending);
864 } elsif ($cur =~ /^(\))/o) {
865 my $new_type = pop(@av_paren_type);
866 if ($new_type ne '_') {
868 print "PAREN('$1') -> $type\n"
869 if ($dbg_values > 1);
871 print "PAREN('$1')\n" if ($dbg_values > 1);
874 } elsif ($cur =~ /^($Ident)\s*\(/o) {
875 print "FUNC($1)\n" if ($dbg_values > 1);
879 } elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) {
880 if (defined $2 && $type eq 'C' || $type eq 'T') {
881 $av_pend_colon = 'B';
882 } elsif ($type eq 'E') {
883 $av_pend_colon = 'L';
885 print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1);
888 } elsif ($cur =~ /^($Ident|$Constant)/o) {
889 print "IDENT($1)\n" if ($dbg_values > 1);
892 } elsif ($cur =~ /^($Assignment)/o) {
893 print "ASSIGN($1)\n" if ($dbg_values > 1);
896 } elsif ($cur =~/^(;|{|})/) {
897 print "END($1)\n" if ($dbg_values > 1);
899 $av_pend_colon = 'O';
901 } elsif ($cur =~/^(,)/) {
902 print "COMMA($1)\n" if ($dbg_values > 1);
905 } elsif ($cur =~ /^(\?)/o) {
906 print "QUESTION($1)\n" if ($dbg_values > 1);
909 } elsif ($cur =~ /^(:)/o) {
910 print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1);
912 substr($var, length($res), 1, $av_pend_colon);
913 if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') {
918 $av_pend_colon = 'O';
920 } elsif ($cur =~ /^(\[)/o) {
921 print "CLOSE($1)\n" if ($dbg_values > 1);
924 } elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) {
927 print "OPV($1)\n" if ($dbg_values > 1);
934 substr($var, length($res), 1, $variant);
937 } elsif ($cur =~ /^($Operators)/o) {
938 print "OP($1)\n" if ($dbg_values > 1);
939 if ($1 ne '++' && $1 ne '--') {
943 } elsif ($cur =~ /(^.)/o) {
944 print "C($1)\n" if ($dbg_values > 1);
947 $cur = substr($cur, length($1));
948 $res .= $type x length($1);
956 my ($possible, $line) = @_;
958 print "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
959 if ($possible !~ /(?:
972 ^(?:typedef|struct|enum)\b
974 # Check for modifiers.
975 $possible =~ s/\s*$Storage\s*//g;
976 $possible =~ s/\s*$Sparse\s*//g;
977 if ($possible =~ /^\s*$/) {
979 } elsif ($possible =~ /\s/) {
980 $possible =~ s/\s*$Type\s*//g;
981 for my $modifier (split(' ', $possible)) {
982 warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
983 push(@modifierList, $modifier);
987 warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
988 push(@typeList, $possible);
992 warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1);
999 if (defined $tst_only && $_[0] !~ /\Q$tst_only\E/) {
1002 my $line = $prefix . $_[0];
1004 $line = (split('\n', $line))[0] . "\n" if ($terse);
1006 push(our @report, $line);
1014 if (report("ERROR: $_[0]\n")) {
1020 if (report("WARNING: $_[0]\n")) {
1026 if ($check && report("CHECK: $_[0]\n")) {
1032 sub check_absolute_file {
1033 my ($absolute, $herecurr) = @_;
1034 my $file = $absolute;
1036 ##print "absolute<$absolute>\n";
1038 # See if any suffix of this path is a path within the tree.
1039 while ($file =~ s@^[^/]*/@@) {
1040 if (-f "$root/$file") {
1041 ##print "file<$file>\n";
1049 # It is, so see if the prefix is acceptable.
1050 my $prefix = $absolute;
1051 substr($prefix, -length($file)) = '';
1053 ##print "prefix<$prefix>\n";
1054 if ($prefix ne ".../") {
1055 WARN("use relative pathname instead of absolute in changelog text\n" . $herecurr);
1060 my $filename = shift;
1066 my $stashrawline="";
1083 # Trace the real file/line as we go.
1089 my $comment_edge = 0;
1093 my $prev_values = 'E';
1096 my %suppress_ifbraces;
1097 my %suppress_whiletrailers;
1099 # Pre-scan the patch sanitizing the lines.
1100 # Pre-scan the patch looking for any __setup documentation.
1102 my @setup_docs = ();
1105 sanitise_line_reset();
1107 foreach my $rawline (@rawlines) {
1111 if ($rawline=~/^\+\+\+\s+(\S+)/) {
1113 if ($1 =~ m@Documentation/kernel-parameters.txt$@) {
1118 if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
1127 # Guestimate if this is a continuing comment. Run
1128 # the context looking for a comment "edge". If this
1129 # edge is a close comment then we must be in a comment
1133 for (my $ln = $linenr + 1; $cnt > 0; $ln++) {
1134 next if (defined $rawlines[$ln - 1] &&
1135 $rawlines[$ln - 1] =~ /^-/);
1137 #print "RAW<$rawlines[$ln - 1]>\n";
1138 last if (!defined $rawlines[$ln - 1]);
1139 if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
1140 $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
1145 if (defined $edge && $edge eq '*/') {
1149 # Guestimate if this is a continuing comment. If this
1150 # is the start of a diff block and this line starts
1151 # ' *' then it is very likely a comment.
1152 if (!defined $edge &&
1153 $rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@)
1158 ##print "COMMENT:$in_comment edge<$edge> $rawline\n";
1159 sanitise_line_reset($in_comment);
1161 } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
1162 # Standardise the strings and chars within the input to
1163 # simplify matching -- only bother with positive lines.
1164 $line = sanitise_line($rawline);
1166 push(@lines, $line);
1169 $realcnt-- if ($line =~ /^(?:\+| |$)/);
1174 #print "==>$rawline\n";
1175 #print "-->$line\n";
1177 if ($setup_docs && $line =~ /^\+/) {
1178 push(@setup_docs, $line);
1186 foreach my $line (@lines) {
1189 my $rawline = $rawlines[$linenr - 1];
1190 my $hunk_line = ($realcnt != 0);
1192 #extract the line range in the file after the patch is applied
1193 if ($line=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
1195 $first_line = $linenr + 1;
1205 %suppress_ifbraces = ();
1206 %suppress_whiletrailers = ();
1209 # track the line number as we move through the hunk, note that
1210 # new versions of GNU diff omit the leading space on completely
1211 # blank context lines so we need to count that too.
1212 } elsif ($line =~ /^( |\+|$)/) {
1214 $realcnt-- if ($realcnt != 0);
1216 # Measure the line length and indent.
1217 ($length, $indent) = line_stats($rawline);
1219 # Track the previous line.
1220 ($prevline, $stashline) = ($stashline, $line);
1221 ($previndent, $stashindent) = ($stashindent, $indent);
1222 ($prevrawline, $stashrawline) = ($stashrawline, $rawline);
1224 #warn "line<$line>\n";
1226 } elsif ($realcnt == 1) {
1230 #make up the handle for any error we report on this line
1231 $prefix = "$filename:$realline: " if ($emacs && $file);
1232 $prefix = "$filename:$linenr: " if ($emacs && !$file);
1234 $here = "#$linenr: " if (!$file);
1235 $here = "#$realline: " if ($file);
1237 # extract the filename as it passes
1238 if ($line=~/^\+\+\+\s+(\S+)/) {
1240 $realfile =~ s@^([^/]*)/@@;
1243 if ($tree && $p1_prefix ne '' && -e "$root/$p1_prefix") {
1244 WARN("patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
1247 if ($realfile =~ m@^include/asm/@) {
1248 ERROR("do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
1253 $here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
1255 my $hereline = "$here\n$rawline\n";
1256 my $herecurr = "$here\n$rawline\n";
1257 my $hereprev = "$here\n$prevrawline\n$rawline\n";
1259 $cnt_lines++ if ($realcnt != 0);
1261 #check the patch for a signoff:
1262 if ($line =~ /^\s*signed-off-by:/i) {
1263 # This is a signoff, if ugly, so do not double report.
1265 if (!($line =~ /^\s*Signed-off-by:/)) {
1266 WARN("Signed-off-by: is the preferred form\n" .
1269 if ($line =~ /^\s*signed-off-by:\S/i) {
1270 WARN("space required after Signed-off-by:\n" .
1275 # Check for wrappage within a valid hunk of the file
1276 if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
1277 ERROR("patch seems to be corrupt (line wrapped?)\n" .
1278 $herecurr) if (!$emitted_corrupt++);
1281 # Check for absolute kernel paths.
1283 while ($line =~ m{(?:^|\s)(/\S*)}g) {
1286 if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
1287 check_absolute_file($1, $herecurr)) {
1290 check_absolute_file($file, $herecurr);
1295 # UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
1296 if (($realfile =~ /^$/ || $line =~ /^\+/) &&
1297 $rawline !~ m/^$UTF8*$/) {
1298 my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
1300 my $blank = copy_spacing($rawline);
1301 my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
1302 my $hereptr = "$hereline$ptr\n";
1304 ERROR("Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
1307 # ignore non-hunk lines and lines being removed
1308 next if (!$hunk_line || $line =~ /^-/);
1310 #trailing whitespace
1311 if ($line =~ /^\+.*\015/) {
1312 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1313 ERROR("DOS line endings\n" . $herevet);
1315 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
1316 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1317 ERROR("trailing whitespace\n" . $herevet);
1320 # check we are in a valid source file if not then ignore this hunk
1321 next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
1324 if ($line =~ /^\+/ && $prevrawline !~ /\/\*\*/ &&
1325 $rawline !~ /^.\s*\*\s*\@$Ident\s/ &&
1326 $line !~ /^\+\s*printk\s*\(\s*(?:KERN_\S+\s*)?"[X\t]*"\s*(?:,|\)\s*;)\s*$/ &&
1329 WARN("line over 80 characters\n" . $herecurr);
1332 # check for adding lines without a newline.
1333 if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
1334 WARN("adding a line without newline at end of file\n" . $herecurr);
1337 # check we are in a valid source file C or perl if not then ignore this hunk
1338 next if ($realfile !~ /\.(h|c|pl)$/);
1340 # at the beginning of a line any tabs must come first and anything
1341 # more than 8 must use tabs.
1342 if ($rawline =~ /^\+\s* \t\s*\S/ ||
1343 $rawline =~ /^\+\s* \s*/) {
1344 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1345 ERROR("code indent should use tabs where possible\n" . $herevet);
1348 # check we are in a valid C source file if not then ignore this hunk
1349 next if ($realfile !~ /\.(h|c)$/);
1351 # check for RCS/CVS revision markers
1352 if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
1353 WARN("CVS style keyword markers, these will _not_ be updated\n". $herecurr);
1356 # Check for potential 'bare' types
1357 my ($stat, $cond, $line_nr_next, $remain_next, $off_next);
1358 if ($realcnt && $line =~ /.\s*\S/) {
1359 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
1360 ctx_statement_block($linenr, $realcnt, 0);
1361 $stat =~ s/\n./\n /g;
1362 $cond =~ s/\n./\n /g;
1367 # Ignore goto labels.
1368 if ($s =~ /$Ident:\*$/s) {
1370 # Ignore functions being called
1371 } elsif ($s =~ /^.\s*$Ident\s*\(/s) {
1373 # declarations always start with types
1374 } 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) {
1377 possible($type, "A:" . $s);
1379 # definitions in global scope can only start with types
1380 } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) {
1381 possible($1, "B:" . $s);
1384 # any (foo ... *) is a pointer cast, and foo is a type
1385 while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) {
1386 possible($1, "C:" . $s);
1389 # Check for any sort of function declaration.
1390 # int foo(something bar, other baz);
1391 # void (*store_gdt)(x86_descr_ptr *);
1392 if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
1393 my ($name_len) = length($1);
1396 substr($ctx, 0, $name_len + 1, '');
1397 $ctx =~ s/\)[^\)]*$//;
1399 for my $arg (split(/\s*,\s*/, $ctx)) {
1400 if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
1402 possible($1, "D:" . $s);
1410 # Checks which may be anchored in the context.
1413 # Check for switch () and associated case and default
1414 # statements should be at the same indent.
1415 if ($line=~/\bswitch\s*\(.*\)/) {
1418 my @ctx = ctx_block_outer($linenr, $realcnt);
1420 for my $ctx (@ctx) {
1421 my ($clen, $cindent) = line_stats($ctx);
1422 if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
1423 $indent != $cindent) {
1424 $err .= "$sep$ctx\n";
1431 ERROR("switch and case should be at the same indent\n$hereline$err");
1435 # if/while/etc brace do not go on next line, unless defining a do while loop,
1436 # or if that brace on the next line is for something else
1437 if ($line =~ /(.*)\b((?:if|while|for|switch)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) {
1438 my $pre_ctx = "$1$2";
1440 my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
1441 my $ctx_cnt = $realcnt - $#ctx - 1;
1442 my $ctx = join("\n", @ctx);
1444 my $ctx_ln = $linenr;
1445 my $ctx_skip = $realcnt;
1447 while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
1448 defined $lines[$ctx_ln - 1] &&
1449 $lines[$ctx_ln - 1] =~ /^-/)) {
1450 ##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
1451 $ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
1455 #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
1456 #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
1458 if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln -1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
1459 ERROR("that open brace { should be on the previous line\n" .
1460 "$here\n$ctx\n$lines[$ctx_ln - 1]\n");
1462 if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
1463 $ctx =~ /\)\s*\;\s*$/ &&
1464 defined $lines[$ctx_ln - 1])
1466 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
1467 if ($nindent > $indent) {
1468 WARN("trailing semicolon indicates no statements, indent implies otherwise\n" .
1469 "$here\n$ctx\n$lines[$ctx_ln - 1]\n");
1474 # Check relative indent for conditionals and blocks.
1475 if ($line =~ /\b(?:(?:if|while|for)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
1476 my ($s, $c) = ($stat, $cond);
1478 substr($s, 0, length($c), '');
1480 # Make sure we remove the line prefixes as we have
1481 # none on the first line, and are going to readd them
1485 # Find out how long the conditional actually is.
1486 my @newlines = ($c =~ /\n/gs);
1487 my $cond_lines = 1 + $#newlines;
1489 # We want to check the first line inside the block
1490 # starting at the end of the conditional, so remove:
1491 # 1) any blank line termination
1492 # 2) any opening brace { on end of the line
1494 my $continuation = 0;
1496 $s =~ s/^.*\bdo\b//;
1498 if ($s =~ s/^\s*\\//) {
1501 if ($s =~ s/^\s*?\n//) {
1506 # Also ignore a loop construct at the end of a
1507 # preprocessor statement.
1508 if (($prevline =~ /^.\s*#\s*define\s/ ||
1509 $prevline =~ /\\\s*$/) && $continuation == 0) {
1515 while ($cond_ptr != $cond_lines) {
1516 $cond_ptr = $cond_lines;
1518 # If we see an #else/#elif then the code
1520 if ($s =~ /^\s*\#\s*(?:else|elif)/) {
1525 # 1) blank lines, they should be at 0,
1526 # 2) preprocessor lines, and
1528 if ($continuation ||
1530 $s =~ /^\s*#\s*?/ ||
1531 $s =~ /^\s*$Ident\s*:/) {
1532 $continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
1538 my (undef, $sindent) = line_stats("+" . $s);
1539 my $stat_real = raw_line($linenr, $cond_lines);
1541 # Check if either of these lines are modified, else
1542 # this is not this patch's fault.
1543 if (!defined($stat_real) ||
1544 $stat !~ /^\+/ && $stat_real !~ /^\+/) {
1547 if (defined($stat_real) && $cond_lines > 1) {
1548 $stat_real = "[...]\n$stat_real";
1551 #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";
1553 if ($check && (($sindent % 8) != 0 ||
1554 ($sindent <= $indent && $s ne ''))) {
1555 WARN("suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
1559 # Track the 'values' across context and added lines.
1560 my $opline = $line; $opline =~ s/^./ /;
1561 my ($curr_values, $curr_vars) =
1562 annotate_values($opline . "\n", $prev_values);
1563 $curr_values = $prev_values . $curr_values;
1565 my $outline = $opline; $outline =~ s/\t/ /g;
1566 print "$linenr > .$outline\n";
1567 print "$linenr > $curr_values\n";
1568 print "$linenr > $curr_vars\n";
1570 $prev_values = substr($curr_values, -1);
1572 #ignore lines not being added
1573 if ($line=~/^[^\+]/) {next;}
1575 # TEST: allow direct testing of the type matcher.
1577 if ($line =~ /^.\s*$Declare\s*$/) {
1578 ERROR("TEST: is type\n" . $herecurr);
1579 } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
1580 ERROR("TEST: is not type ($1 is)\n". $herecurr);
1584 # TEST: allow direct testing of the attribute matcher.
1586 if ($line =~ /^.\s*$Attribute\s*$/) {
1587 ERROR("TEST: is attr\n" . $herecurr);
1588 } elsif ($dbg_attr > 1 && $line =~ /^.+($Attribute)/) {
1589 ERROR("TEST: is not attr ($1 is)\n". $herecurr);
1594 # check for initialisation to aggregates open brace on the next line
1595 if ($prevline =~ /$Declare\s*$Ident\s*=\s*$/ &&
1596 $line =~ /^.\s*{/) {
1597 ERROR("that open brace { should be on the previous line\n" . $hereprev);
1601 # Checks which are anchored on the added line.
1604 # check for malformed paths in #include statements (uses RAW line)
1605 if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
1607 if ($path =~ m{//}) {
1608 ERROR("malformed #include filename\n" .
1613 # no C99 // comments
1614 if ($line =~ m{//}) {
1615 ERROR("do not use C99 // comments\n" . $herecurr);
1617 # Remove C99 comments.
1619 $opline =~ s@//.*@@;
1621 #EXPORT_SYMBOL should immediately follow its function closing }.
1622 if (($line =~ /EXPORT_SYMBOL.*\((.*)\)/) ||
1623 ($line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
1625 if ($prevline !~ /(?:
1627 ^.DEFINE_$Ident\(\Q$name\E\)|
1628 ^.DECLARE_$Ident\(\Q$name\E\)|
1629 ^.LIST_HEAD\(\Q$name\E\)|
1630 ^.$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
1631 \b\Q$name\E(?:\s+$Attribute)?\s*(?:;|=|\[)
1633 WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
1637 # check for external initialisers.
1638 if ($line =~ /^.$Type\s*$Ident\s*(?:\s+$Modifier)*\s*=\s*(0|NULL|false)\s*;/) {
1639 ERROR("do not initialise externals to 0 or NULL\n" .
1642 # check for static initialisers.
1643 if ($line =~ /\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
1644 ERROR("do not initialise statics to 0 or NULL\n" .
1648 # check for new typedefs, only function parameters and sparse annotations
1650 if ($line =~ /\btypedef\s/ &&
1651 $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
1652 $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
1653 $line !~ /\b$typeTypedefs\b/ &&
1654 $line !~ /\b__bitwise(?:__|)\b/) {
1655 WARN("do not add new typedefs\n" . $herecurr);
1658 # * goes on variable not on type
1660 if ($line =~ m{\($NonptrType(\s*\*[\s\*]*(?:$Modifier\s*)*)\)}) {
1661 my ($from, $to) = ($1, $1);
1663 # Should start with a space.
1664 $to =~ s/^(\S)/ $1/;
1665 # Should not end with a space.
1667 # '*'s should not have spaces between.
1668 while ($to =~ s/\*\s+\*/\*\*/) {
1671 #print "from<$from> to<$to>\n";
1673 ERROR("\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr);
1675 } elsif ($line =~ m{\b$NonptrType(\s*\*[\s\*]*(?:$Modifier\s*)?)($Ident)}) {
1676 my ($from, $to, $ident) = ($1, $1, $2);
1678 # Should start with a space.
1679 $to =~ s/^(\S)/ $1/;
1680 # Should not end with a space.
1682 # '*'s should not have spaces between.
1683 while ($to =~ s/\*\s+\*/\*\*/) {
1685 # Modifiers should have spaces.
1686 $to =~ s/(\b$Modifier$)/$1 /;
1688 #print "from<$from> to<$to>\n";
1690 ERROR("\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr);
1694 # # no BUG() or BUG_ON()
1695 # if ($line =~ /\b(BUG|BUG_ON)\b/) {
1696 # print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
1697 # print "$herecurr";
1701 if ($line =~ /\bLINUX_VERSION_CODE\b/) {
1702 WARN("LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
1705 # printk should use KERN_* levels. Note that follow on printk's on the
1706 # same line do not need a level, so we use the current block context
1707 # to try and find and validate the current printk. In summary the current
1708 # printk includes all preceeding printk's which have no newline on the end.
1709 # we assume the first bad printk is the one to report.
1710 if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
1712 for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
1713 #print "CHECK<$lines[$ln - 1]\n";
1714 # we have a preceeding printk if it ends
1715 # with "\n" ignore it, else it is to blame
1716 if ($lines[$ln - 1] =~ m{\bprintk\(}) {
1717 if ($rawlines[$ln - 1] !~ m{\\n"}) {
1724 WARN("printk() should include KERN_ facility level\n" . $herecurr);
1728 # function brace can't be on same line, except for #defines of do while,
1729 # or if closed on same line
1730 if (($line=~/$Type\s*$Ident\(.*\).*\s{/) and
1731 !($line=~/\#\s*define.*do\s{/) and !($line=~/}/)) {
1732 ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
1735 # open braces for enum, union and struct go on the same line.
1736 if ($line =~ /^.\s*{/ &&
1737 $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
1738 ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
1741 # check for spacing round square brackets; allowed:
1742 # 1. with a type on the left -- int [] a;
1743 # 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
1744 # 3. inside a curly brace -- = { [0...10] = 5 }
1745 while ($line =~ /(.*?\s)\[/g) {
1746 my ($where, $prefix) = ($-[1], $1);
1747 if ($prefix !~ /$Type\s+$/ &&
1748 ($where != 0 || $prefix !~ /^.\s+$/) &&
1749 $prefix !~ /{\s+$/) {
1750 ERROR("space prohibited before open square bracket '['\n" . $herecurr);
1754 # check for spaces between functions and their parentheses.
1755 while ($line =~ /($Ident)\s+\(/g) {
1757 my $ctx_before = substr($line, 0, $-[1]);
1758 my $ctx = "$ctx_before$name";
1760 # Ignore those directives where spaces _are_ permitted.
1762 if|for|while|switch|return|case|
1763 volatile|__volatile__|
1764 __attribute__|format|__extension__|
1768 # cpp #define statements have non-optional spaces, ie
1769 # if there is a space between the name and the open
1770 # parenthesis it is simply not a parameter group.
1771 } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
1773 # cpp #elif statement condition may start with a (
1774 } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
1776 # If this whole things ends with a type its most
1777 # likely a typedef for a function.
1778 } elsif ($ctx =~ /$Type$/) {
1781 WARN("space prohibited between function name and open parenthesis '('\n" . $herecurr);
1784 # Check operator spacing.
1785 if (!($line=~/\#\s*include/)) {
1787 <<=|>>=|<=|>=|==|!=|
1788 \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
1789 =>|->|<<|>>|<|>|=|!|~|
1790 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
1793 my @elements = split(/($ops|;)/, $opline);
1796 my $blank = copy_spacing($opline);
1798 for (my $n = 0; $n < $#elements; $n += 2) {
1799 $off += length($elements[$n]);
1801 # Pick up the preceeding and succeeding characters.
1802 my $ca = substr($opline, 0, $off);
1804 if (length($opline) >= ($off + length($elements[$n + 1]))) {
1805 $cc = substr($opline, $off + length($elements[$n + 1]));
1807 my $cb = "$ca$;$cc";
1810 $a = 'V' if ($elements[$n] ne '');
1811 $a = 'W' if ($elements[$n] =~ /\s$/);
1812 $a = 'C' if ($elements[$n] =~ /$;$/);
1813 $a = 'B' if ($elements[$n] =~ /(\[|\()$/);
1814 $a = 'O' if ($elements[$n] eq '');
1815 $a = 'E' if ($ca =~ /^\s*$/);
1817 my $op = $elements[$n + 1];
1820 if (defined $elements[$n + 2]) {
1821 $c = 'V' if ($elements[$n + 2] ne '');
1822 $c = 'W' if ($elements[$n + 2] =~ /^\s/);
1823 $c = 'C' if ($elements[$n + 2] =~ /^$;/);
1824 $c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
1825 $c = 'O' if ($elements[$n + 2] eq '');
1826 $c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
1831 my $ctx = "${a}x${c}";
1833 my $at = "(ctx:$ctx)";
1835 my $ptr = substr($blank, 0, $off) . "^";
1836 my $hereptr = "$hereline$ptr\n";
1838 # Pull out the value of this operator.
1839 my $op_type = substr($curr_values, $off + 1, 1);
1841 # Get the full operator variant.
1842 my $opv = $op . substr($curr_vars, $off, 1);
1844 # Ignore operators passed as parameters.
1845 if ($op_type ne 'V' &&
1846 $ca =~ /\s$/ && $cc =~ /^\s*,/) {
1849 # } elsif ($op =~ /^$;+$/) {
1851 # ; should have either the end of line or a space or \ after it
1852 } elsif ($op eq ';') {
1853 if ($ctx !~ /.x[WEBC]/ &&
1854 $cc !~ /^\\/ && $cc !~ /^;/) {
1855 ERROR("space required after that '$op' $at\n" . $hereptr);
1859 } elsif ($op eq '//') {
1863 # : when part of a bitfield
1864 } elsif ($op eq '->' || $opv eq ':B') {
1865 if ($ctx =~ /Wx.|.xW/) {
1866 ERROR("spaces prohibited around that '$op' $at\n" . $hereptr);
1869 # , must have a space on the right.
1870 } elsif ($op eq ',') {
1871 if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
1872 ERROR("space required after that '$op' $at\n" . $hereptr);
1875 # '*' as part of a type definition -- reported already.
1876 } elsif ($opv eq '*_') {
1877 #warn "'*' is part of type\n";
1879 # unary operators should have a space before and
1880 # none after. May be left adjacent to another
1881 # unary operator, or a cast
1882 } elsif ($op eq '!' || $op eq '~' ||
1883 $opv eq '*U' || $opv eq '-U' ||
1884 $opv eq '&U' || $opv eq '&&U') {
1885 if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
1886 ERROR("space required before that '$op' $at\n" . $hereptr);
1888 if ($op eq '*' && $cc =~/\s*const\b/) {
1889 # A unary '*' may be const
1891 } elsif ($ctx =~ /.xW/) {
1892 ERROR("space prohibited after that '$op' $at\n" . $hereptr);
1895 # unary ++ and unary -- are allowed no space on one side.
1896 } elsif ($op eq '++' or $op eq '--') {
1897 if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
1898 ERROR("space required one side of that '$op' $at\n" . $hereptr);
1900 if ($ctx =~ /Wx[BE]/ ||
1901 ($ctx =~ /Wx./ && $cc =~ /^;/)) {
1902 ERROR("space prohibited before that '$op' $at\n" . $hereptr);
1904 if ($ctx =~ /ExW/) {
1905 ERROR("space prohibited after that '$op' $at\n" . $hereptr);
1909 # << and >> may either have or not have spaces both sides
1910 } elsif ($op eq '<<' or $op eq '>>' or
1911 $op eq '&' or $op eq '^' or $op eq '|' or
1912 $op eq '+' or $op eq '-' or
1913 $op eq '*' or $op eq '/' or
1916 if ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
1917 ERROR("need consistent spacing around '$op' $at\n" .
1921 # A colon needs no spaces before when it is
1922 # terminating a case value or a label.
1923 } elsif ($opv eq ':C' || $opv eq ':L') {
1924 if ($ctx =~ /Wx./) {
1925 ERROR("space prohibited before that '$op' $at\n" . $hereptr);
1928 # All the others need spaces both sides.
1929 } elsif ($ctx !~ /[EWC]x[CWE]/) {
1932 # Ignore email addresses <foo@bar>
1934 $cc =~ /^\S+\@\S+>/) ||
1936 $ca =~ /<\S+\@\S+$/))
1942 if (($opv eq ':O' && $ca =~ /\?$/) ||
1943 ($op eq '?' && $cc =~ /^:/)) {
1948 ERROR("spaces required around that '$op' $at\n" . $hereptr);
1951 $off += length($elements[$n + 1]);
1955 # check for multiple assignments
1956 if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
1957 CHK("multiple assignments should be avoided\n" . $herecurr);
1960 ## # check for multiple declarations, allowing for a function declaration
1962 ## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
1963 ## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
1965 ## # Remove any bracketed sections to ensure we do not
1966 ## # falsly report the parameters of functions.
1968 ## while ($ln =~ s/\([^\(\)]*\)//g) {
1970 ## if ($ln =~ /,/) {
1971 ## WARN("declaring multiple variables together should be avoided\n" . $herecurr);
1975 #need space before brace following if, while, etc
1976 if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
1978 ERROR("space required before the open brace '{'\n" . $herecurr);
1981 # closing brace should have a space following it when it has anything
1983 if ($line =~ /}(?!(?:,|;|\)))\S/) {
1984 ERROR("space required after that close brace '}'\n" . $herecurr);
1987 # check spacing on square brackets
1988 if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
1989 ERROR("space prohibited after that open square bracket '['\n" . $herecurr);
1991 if ($line =~ /\s\]/) {
1992 ERROR("space prohibited before that close square bracket ']'\n" . $herecurr);
1995 # check spacing on parentheses
1996 if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
1997 $line !~ /for\s*\(\s+;/) {
1998 ERROR("space prohibited after that open parenthesis '('\n" . $herecurr);
2000 if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
2001 $line !~ /for\s*\(.*;\s+\)/ &&
2002 $line !~ /:\s+\)/) {
2003 ERROR("space prohibited before that close parenthesis ')'\n" . $herecurr);
2006 #goto labels aren't indented, allow a single space however
2007 if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
2008 !($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
2009 WARN("labels should not be indented\n" . $herecurr);
2012 # Return is not a function.
2013 if (defined($stat) && $stat =~ /^.\s*return(\s*)(\(.*);/s) {
2017 # Flatten any parentheses
2018 $value =~ s/\)\(/\) \(/g;
2019 while ($value =~ s/\[[^\{\}]*\]/1/ ||
2020 $value !~ /(?:$Ident|-?$Constant)\s*
2022 (?:$Ident|-?$Constant)/x &&
2023 $value =~ s/\([^\(\)]*\)/1/) {
2026 if ($value =~ /^(?:$Ident|-?$Constant)$/) {
2027 ERROR("return is not a function, parentheses are not required\n" . $herecurr);
2029 } elsif ($spacing !~ /\s+/) {
2030 ERROR("space required before the open parenthesis '('\n" . $herecurr);
2034 # Need a space before open parenthesis after if, while etc
2035 if ($line=~/\b(if|while|for|switch)\(/) {
2036 ERROR("space required before the open parenthesis '('\n" . $herecurr);
2039 # Check for illegal assignment in if conditional -- and check for trailing
2040 # statements after the conditional.
2041 if ($line =~ /do\s*(?!{)/) {
2042 my ($stat_next) = ctx_statement_block($line_nr_next,
2043 $remain_next, $off_next);
2044 $stat_next =~ s/\n./\n /g;
2045 ##print "stat<$stat> stat_next<$stat_next>\n";
2047 if ($stat_next =~ /^\s*while\b/) {
2048 # If the statement carries leading newlines,
2049 # then count those as offsets.
2051 ($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
2053 statement_rawlines($whitespace) - 1;
2055 $suppress_whiletrailers{$line_nr_next +
2059 if (!defined $suppress_whiletrailers{$linenr} &&
2060 $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
2061 my ($s, $c) = ($stat, $cond);
2063 if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
2064 ERROR("do not use assignment in if condition\n" . $herecurr);
2067 # Find out what is on the end of the line after the
2069 substr($s, 0, length($c), '');
2071 $s =~ s/$;//g; # Remove any comments
2072 if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
2073 $c !~ /}\s*while\s*/)
2075 # Find out how long the conditional actually is.
2076 my @newlines = ($c =~ /\n/gs);
2077 my $cond_lines = 1 + $#newlines;
2079 my $stat_real = raw_line($linenr, $cond_lines);
2080 if (defined($stat_real) && $cond_lines > 1) {
2081 $stat_real = "[...]\n$stat_real";
2084 ERROR("trailing statements should be on next line\n" . $herecurr . $stat_real);
2088 # Check for bitwise tests written as boolean
2100 WARN("boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
2103 # if and else should not have general statements after it
2104 if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
2106 $s =~ s/$;//g; # Remove any comments
2107 if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
2108 ERROR("trailing statements should be on next line\n" . $herecurr);
2111 # if should not continue a brace
2112 if ($line =~ /}\s*if\b/) {
2113 ERROR("trailing statements should be on next line\n" .
2116 # case and default should not have general statements after them
2117 if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
2119 (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
2123 ERROR("trailing statements should be on next line\n" . $herecurr);
2126 # Check for }<nl>else {, these must be at the same
2127 # indent level to be relevant to each other.
2128 if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
2129 $previndent == $indent) {
2130 ERROR("else should follow close brace '}'\n" . $hereprev);
2133 if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ and
2134 $previndent == $indent) {
2135 my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
2137 # Find out what is on the end of the line after the
2139 substr($s, 0, length($c), '');
2142 if ($s =~ /^\s*;/) {
2143 ERROR("while should follow close brace '}'\n" . $hereprev);
2147 #studly caps, commented out until figure out how to distinguish between use of existing and adding new
2148 # if (($line=~/[\w_][a-z\d]+[A-Z]/) and !($line=~/print/)) {
2149 # print "No studly caps, use _\n";
2150 # print "$herecurr";
2154 #no spaces allowed after \ in define
2155 if ($line=~/\#\s*define.*\\\s$/) {
2156 WARN("Whitepspace after \\ makes next lines useless\n" . $herecurr);
2159 #warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
2160 if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
2162 my $checkfile = "include/linux/$file";
2163 if (-f "$root/$checkfile" &&
2164 $realfile ne $checkfile &&
2167 if ($realfile =~ m{^arch/}) {
2168 CHK("Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
2170 WARN("Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
2175 # multi-statement macros should be enclosed in a do while loop, grab the
2176 # first statement and ensure its the whole macro if its not enclosed
2177 # in a known good container
2178 if ($realfile !~ m@/vmlinux.lds.h$@ &&
2179 $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
2182 my ($off, $dstat, $dcond, $rest);
2185 my $args = defined($1);
2187 # Find the end of the macro and limit our statement
2189 while ($cnt > 0 && defined $lines[$ln - 1] &&
2190 $lines[$ln - 1] =~ /^(?:-|..*\\$)/)
2192 $ctx .= $rawlines[$ln - 1] . "\n";
2193 $cnt-- if ($lines[$ln - 1] !~ /^-/);
2196 $ctx .= $rawlines[$ln - 1];
2198 ($dstat, $dcond, $ln, $cnt, $off) =
2199 ctx_statement_block($linenr, $ln - $linenr + 1, 0);
2200 #print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
2201 #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
2203 # Extract the remainder of the define (if any) and
2204 # rip off surrounding spaces, and trailing \'s.
2206 while ($off != 0 || ($cnt > 0 && $rest =~ /\\\s*$/)) {
2207 #print "ADDING cnt<$cnt> $off <" . substr($lines[$ln - 1], $off) . "> rest<$rest>\n";
2208 if ($off != 0 || $lines[$ln - 1] !~ /^-/) {
2209 $rest .= substr($lines[$ln - 1], $off) . "\n";
2215 $rest =~ s/\\\n.//g;
2219 # Clean up the original statement.
2221 substr($dstat, 0, length($dcond), '');
2223 $dstat =~ s/^.\s*\#\s*define\s+$Ident\s*//;
2226 $dstat =~ s/\\\n.//g;
2227 $dstat =~ s/^\s*//s;
2228 $dstat =~ s/\s*$//s;
2230 # Flatten any parentheses and braces
2231 while ($dstat =~ s/\([^\(\)]*\)/1/ ||
2232 $dstat =~ s/\{[^\{\}]*\}/1/ ||
2233 $dstat =~ s/\[[^\{\}]*\]/1/)
2237 my $exceptions = qr{
2246 #print "REST<$rest> dstat<$dstat>\n";
2248 if ($rest !~ /while\s*\(/ &&
2249 $dstat !~ /$exceptions/)
2251 ERROR("Macros with multiple statements should be enclosed in a do - while loop\n" . "$here\n$ctx\n");
2254 } elsif ($ctx !~ /;/) {
2256 $dstat !~ /^(?:$Ident|-?$Constant)$/ &&
2257 $dstat !~ /$exceptions/ &&
2258 $dstat !~ /^\.$Ident\s*=/ &&
2259 $dstat =~ /$Operators/)
2261 ERROR("Macros with complex values should be enclosed in parenthesis\n" . "$here\n$ctx\n");
2266 # make sure symbols are always wrapped with VMLINUX_SYMBOL() ...
2267 # all assignments may have only one of the following with an assignment:
2270 # VMLINUX_SYMBOL(...)
2271 if ($realfile eq 'vmlinux.lds.h' && $line =~ /(?:(?:^|\s)$Ident\s*=|=\s*$Ident(?:\s|$))/) {
2272 WARN("vmlinux.lds.h needs VMLINUX_SYMBOL() around C-visible symbols\n" . $herecurr);
2275 # check for redundant bracing round if etc
2276 if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
2277 my ($level, $endln, @chunks) =
2278 ctx_statement_full($linenr, $realcnt, 1);
2279 #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
2280 #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
2281 if ($#chunks > 0 && $level == 0) {
2284 my $herectx = $here . "\n";
2285 my $ln = $linenr - 1;
2286 for my $chunk (@chunks) {
2287 my ($cond, $block) = @{$chunk};
2289 # If the condition carries leading newlines, then count those as offsets.
2290 my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
2291 my $offset = statement_rawlines($whitespace) - 1;
2293 #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
2295 # We have looked at and allowed this specific line.
2296 $suppress_ifbraces{$ln + $offset} = 1;
2298 $herectx .= "$rawlines[$ln + $offset]\n[...]\n";
2299 $ln += statement_rawlines($block) - 1;
2301 substr($block, 0, length($cond), '');
2303 $seen++ if ($block =~ /^\s*{/);
2305 #print "cond<$cond> block<$block> allowed<$allowed>\n";
2306 if (statement_lines($cond) > 1) {
2307 #print "APW: ALLOWED: cond<$cond>\n";
2310 if ($block =~/\b(?:if|for|while)\b/) {
2311 #print "APW: ALLOWED: block<$block>\n";
2314 if (statement_block_size($block) > 1) {
2315 #print "APW: ALLOWED: lines block<$block>\n";
2319 if ($seen && !$allowed) {
2320 WARN("braces {} are not necessary for any arm of this statement\n" . $herectx);
2324 if (!defined $suppress_ifbraces{$linenr - 1} &&
2325 $line =~ /\b(if|while|for|else)\b/) {
2328 # Check the pre-context.
2329 if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
2330 #print "APW: ALLOWED: pre<$1>\n";
2334 my ($level, $endln, @chunks) =
2335 ctx_statement_full($linenr, $realcnt, $-[0]);
2337 # Check the condition.
2338 my ($cond, $block) = @{$chunks[0]};
2339 #print "CHECKING<$linenr> cond<$cond> block<$block>\n";
2340 if (defined $cond) {
2341 substr($block, 0, length($cond), '');
2343 if (statement_lines($cond) > 1) {
2344 #print "APW: ALLOWED: cond<$cond>\n";
2347 if ($block =~/\b(?:if|for|while)\b/) {
2348 #print "APW: ALLOWED: block<$block>\n";
2351 if (statement_block_size($block) > 1) {
2352 #print "APW: ALLOWED: lines block<$block>\n";
2355 # Check the post-context.
2356 if (defined $chunks[1]) {
2357 my ($cond, $block) = @{$chunks[1]};
2358 if (defined $cond) {
2359 substr($block, 0, length($cond), '');
2361 if ($block =~ /^\s*\{/) {
2362 #print "APW: ALLOWED: chunk-1 block<$block>\n";
2366 if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
2367 my $herectx = $here . "\n";;
2368 my $cnt = statement_rawlines($block);
2370 for (my $n = 0; $n < $cnt; $n++) {
2371 $herectx .= raw_line($linenr, $n) . "\n";;
2374 WARN("braces {} are not necessary for single statement blocks\n" . $herectx);
2378 # don't include deprecated include files (uses RAW line)
2379 for my $inc (@dep_includes) {
2380 if ($rawline =~ m@^.\s*\#\s*include\s*\<$inc>@) {
2381 ERROR("Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n" . $herecurr);
2385 # don't use deprecated functions
2386 for my $func (@dep_functions) {
2387 if ($line =~ /\b$func\b/) {
2388 ERROR("Don't use $func(): see Documentation/feature-removal-schedule.txt\n" . $herecurr);
2392 # no volatiles please
2393 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
2394 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
2395 WARN("Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
2398 # SPIN_LOCK_UNLOCKED & RW_LOCK_UNLOCKED are deprecated
2399 if ($line =~ /\b(SPIN_LOCK_UNLOCKED|RW_LOCK_UNLOCKED)/) {
2400 ERROR("Use of $1 is deprecated: see Documentation/spinlocks.txt\n" . $herecurr);
2404 if ($line =~ /^.\s*\#\s*if\s+0\b/) {
2405 CHK("if this code is redundant consider removing it\n" .
2409 # check for needless kfree() checks
2410 if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
2412 if ($line =~ /\bkfree\(\Q$expr\E\);/) {
2413 WARN("kfree(NULL) is safe this check is probably not required\n" . $hereprev);
2416 # check for needless usb_free_urb() checks
2417 if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
2419 if ($line =~ /\busb_free_urb\(\Q$expr\E\);/) {
2420 WARN("usb_free_urb(NULL) is safe this check is probably not required\n" . $hereprev);
2424 # warn about #ifdefs in C files
2425 # if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
2426 # print "#ifdef in C files should be avoided\n";
2427 # print "$herecurr";
2431 # warn about spacing in #ifdefs
2432 if ($line =~ /^.\s*\#\s*(ifdef|ifndef|elif)\s\s+/) {
2433 ERROR("exactly one space required after that #$1\n" . $herecurr);
2436 # check for spinlock_t definitions without a comment.
2437 if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ ||
2438 $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
2440 if (!ctx_has_comment($first_line, $linenr)) {
2441 CHK("$1 definition without comment\n" . $herecurr);
2444 # check for memory barriers without a comment.
2445 if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
2446 if (!ctx_has_comment($first_line, $linenr)) {
2447 CHK("memory barrier without comment\n" . $herecurr);
2450 # check of hardware specific defines
2451 if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
2452 CHK("architecture specific defines should be avoided\n" . $herecurr);
2455 # check the location of the inline attribute, that it is between
2456 # storage class and type.
2457 if ($line =~ /\b$Type\s+$Inline\b/ ||
2458 $line =~ /\b$Inline\s+$Storage\b/) {
2459 ERROR("inline keyword should sit between storage class and type\n" . $herecurr);
2462 # Check for __inline__ and __inline, prefer inline
2463 if ($line =~ /\b(__inline__|__inline)\b/) {
2464 WARN("plain inline is preferred over $1\n" . $herecurr);
2467 # check for new externs in .c files.
2468 if ($realfile =~ /\.c$/ && defined $stat &&
2469 $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
2471 my $function_name = $1;
2472 my $paren_space = $2;
2475 if (defined $cond) {
2476 substr($s, 0, length($cond), '');
2478 if ($s =~ /^\s*;/ &&
2479 $function_name ne 'uninitialized_var')
2481 WARN("externs should be avoided in .c files\n" . $herecurr);
2484 if ($paren_space =~ /\n/) {
2485 WARN("arguments for function declarations should follow identifier\n" . $herecurr);
2488 } elsif ($realfile =~ /\.c$/ && defined $stat &&
2489 $stat =~ /^.\s*extern\s+/)
2491 WARN("externs should be avoided in .c files\n" . $herecurr);
2494 # checks for new __setup's
2495 if ($rawline =~ /\b__setup\("([^"]*)"/) {
2498 if (!grep(/$name/, @setup_docs)) {
2499 CHK("__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
2503 # check for pointless casting of kmalloc return
2504 if ($line =~ /\*\s*\)\s*k[czm]alloc\b/) {
2505 WARN("unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
2508 # check for gcc specific __FUNCTION__
2509 if ($line =~ /__FUNCTION__/) {
2510 WARN("__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr);
2513 # check for semaphores used as mutexes
2514 if ($line =~ /^.\s*(DECLARE_MUTEX|init_MUTEX)\s*\(/) {
2515 WARN("mutexes are preferred for single holder semaphores\n" . $herecurr);
2517 # check for semaphores used as mutexes
2518 if ($line =~ /^.\s*init_MUTEX_LOCKED\s*\(/) {
2519 WARN("consider using a completion\n" . $herecurr);
2521 # recommend strict_strto* over simple_strto*
2522 if ($line =~ /\bsimple_(strto.*?)\s*\(/) {
2523 WARN("consider using strict_$1 in preference to simple_$1\n" . $herecurr);
2525 # check for __initcall(), use device_initcall() explicitly please
2526 if ($line =~ /^.\s*__initcall\s*\(/) {
2527 WARN("please use device_initcall() instead of __initcall()\n" . $herecurr);
2529 # check for struct file_operations, ensure they are const.
2530 if ($line !~ /\bconst\b/ &&
2531 $line =~ /\bstruct\s+(file_operations|seq_operations)\b/) {
2532 WARN("struct $1 should normally be const\n" .
2536 # use of NR_CPUS is usually wrong
2537 # ignore definitions of NR_CPUS and usage to define arrays as likely right
2538 if ($line =~ /\bNR_CPUS\b/ &&
2539 $line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ &&
2540 $line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ &&
2541 $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
2542 $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
2543 $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/)
2545 WARN("usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
2548 # check for %L{u,d,i} in strings
2550 while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
2551 $string = substr($rawline, $-[1], $+[1] - $-[1]);
2552 $string =~ s/%%/__/g;
2553 if ($string =~ /(?<!%)%L[udi]/) {
2554 WARN("\%Ld/%Lu are not-standard C, use %lld/%llu\n" . $herecurr);
2559 # whine mightly about in_atomic
2560 if ($line =~ /\bin_atomic\s*\(/) {
2561 if ($realfile =~ m@^drivers/@) {
2562 ERROR("do not use in_atomic in drivers\n" . $herecurr);
2564 WARN("use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
2569 # If we have no input at all, then there is nothing to report on
2570 # so just keep quiet.
2571 if ($#rawlines == -1) {
2575 # In mailback mode only produce a report in the negative, for
2576 # things that appear to be patches.
2577 if ($mailback && ($clean == 1 || !$is_patch)) {
2581 # This is not a patch, and we are are in 'no-patch' mode so
2583 if (!$chk_patch && !$is_patch) {
2588 ERROR("Does not appear to be a unified-diff format patch\n");
2590 if ($is_patch && $chk_signoff && $signoff == 0) {
2591 ERROR("Missing Signed-off-by: line(s)\n");
2594 print report_dump();
2595 if ($summary && !($clean == 1 && $quiet == 1)) {
2596 print "$filename " if ($summary_file);
2597 print "total: $cnt_error errors, $cnt_warn warnings, " .
2598 (($check)? "$cnt_chk checks, " : "") .
2599 "$cnt_lines lines checked\n";
2600 print "\n" if ($quiet == 0);
2603 if ($clean == 1 && $quiet == 0) {
2604 print "$vname has no obvious style problems and is ready for submission.\n"
2606 if ($clean == 0 && $quiet == 0) {
2607 print "$vname has style problems, please review. If any of these errors\n";
2608 print "are false positives report them to the maintainer, see\n";
2609 print "CHECKPATCH in MAINTAINERS.\n";