2 # (c) 2001, Dave Jones. (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) 2008,2009, 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);
37 Usage: $P [OPTION]... [FILE]...
42 --no-tree run without a kernel tree
43 --no-signoff do not check for 'Signed-off-by' line
44 --patch treat FILE as patchfile (default)
45 --emacs emacs compile window format
46 --terse one line per report
47 -f, --file treat FILE as regular source file
48 --subjective, --strict enable more subjective tests
49 --root=PATH PATH to the kernel tree root
50 --no-summary suppress the per-file summary
51 --mailback only produce a report in case of warnings/errors
52 --summary-file include the filename in summary
53 --debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of
54 'values', 'possible', 'type', and 'attr' (default
56 --test-only=WORD report only warnings/errors containing WORD
58 -h, --help, --version display this help and exit
60 When FILE is - read standard input.
67 'q|quiet+' => \$quiet,
69 'signoff!' => \$chk_signoff,
70 'patch!' => \$chk_patch,
74 'subjective!' => \$check,
77 'summary!' => \$summary,
78 'mailback!' => \$mailback,
79 'summary-file!' => \$summary_file,
82 'test-only=s' => \$tst_only,
92 print "$P: no input files\n";
100 for my $key (keys %debug) {
102 eval "\${dbg_$key} = '$debug{$key}';";
113 if (!top_of_kernel_tree($root)) {
114 die "$P: $root: --root does not point at a valid tree\n";
117 if (top_of_kernel_tree('.')) {
119 } elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
120 top_of_kernel_tree($1)) {
125 if (!defined $root) {
126 print "Must be run from the top-level dir. of a kernel tree\n";
131 my $emitted_corrupt = 0;
134 [A-Za-z_][A-Za-z\d_]*
135 (?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)*
137 our $Storage = qr{extern|static|asmlinkage};
149 # Notes to $Attribute:
150 # We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
155 __(?:mem|cpu|dev|)(?:initdata|initconst|init\b)|
156 ____cacheline_aligned|
157 ____cacheline_aligned_in_smp|
158 ____cacheline_internodealigned_in_smp|
162 our $Inline = qr{inline|__always_inline|noinline};
163 our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
164 our $Lval = qr{$Ident(?:$Member)*};
166 our $Constant = qr{(?:[0-9]+|0x[0-9a-fA-F]+)[UL]*};
167 our $Assignment = qr{(?:\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=)};
168 our $Compare = qr{<=|>=|==|!=|<|>};
172 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%
180 [\x09\x0A\x0D\x20-\x7E] # ASCII
181 | [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
182 | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
183 | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
184 | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
185 | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
186 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
187 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
190 our $typeTypedefs = qr{(?x:
191 (?:__)?(?:u|s|be|le)(?:8|16|32|64)|
195 our $logFunctions = qr{(?x:
197 pr_(debug|dbg|vdbg|devel|info|warning|err|notice|alert|crit|emerg|cont)|
198 dev_(printk|dbg|vdbg|info|warn|err|notice|alert|crit|emerg|WARN)|
205 qr{(?:unsigned\s+)?char},
206 qr{(?:unsigned\s+)?short},
207 qr{(?:unsigned\s+)?int},
208 qr{(?:unsigned\s+)?long},
209 qr{(?:unsigned\s+)?long\s+int},
210 qr{(?:unsigned\s+)?long\s+long},
211 qr{(?:unsigned\s+)?long\s+long\s+int},
220 qr{${Ident}_handler},
221 qr{${Ident}_handler_fn},
223 our @modifierList = (
228 my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)";
229 my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)";
230 $Modifier = qr{(?:$Attribute|$Sparse|$mods)};
232 (?:$Modifier\s+|const\s+)*
234 (?:typeof|__typeof__)\s*\(\s*\**\s*$Ident\s*\)|
238 (?:\s+$Modifier|\s+const)*
242 (?:[\s\*]+\s*const|[\s\*]+|(?:\s*\[\s*\])+)?
243 (?:\s+$Inline|\s+$Modifier)*
245 $Declare = qr{(?:$Storage\s+)?$Type};
249 $chk_signoff = 0 if ($file);
251 my @dep_includes = ();
252 my @dep_functions = ();
253 my $removal = "Documentation/feature-removal-schedule.txt";
254 if ($tree && -f "$root/$removal") {
255 open(my $REMOVE, '<', "$root/$removal") ||
256 die "$P: $removal: open failed - $!\n";
258 if (/^Check:\s+(.*\S)/) {
259 for my $entry (split(/[, ]+/, $1)) {
260 if ($entry =~ m@include/(.*)@) {
261 push(@dep_includes, $1);
263 } elsif ($entry !~ m@/@) {
264 push(@dep_functions, $entry);
275 for my $filename (@ARGV) {
278 open($FILE, '-|', "diff -u /dev/null $filename") ||
279 die "$P: $filename: diff failed - $!\n";
280 } elsif ($filename eq '-') {
281 open($FILE, '<&STDIN');
283 open($FILE, '<', "$filename") ||
284 die "$P: $filename: open failed - $!\n";
286 if ($filename eq '-') {
287 $vname = 'Your patch';
296 if (!process($filename)) {
305 sub top_of_kernel_tree {
309 "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
310 "README", "Documentation", "arch", "include", "drivers",
311 "fs", "init", "ipc", "kernel", "lib", "scripts",
314 foreach my $check (@tree_check) {
315 if (! -e $root . '/' . $check) {
327 for my $c (split(//, $str)) {
331 for (; ($n % 8) != 0; $n++) {
343 (my $res = shift) =~ tr/\t/ /c;
350 # Drop the diff line leader and expand tabs
352 $line = expand_tabs($line);
354 # Pick the indent from the front of the line.
355 my ($white) = ($line =~ /^(\s*)/);
357 return (length($line), length($white));
360 my $sanitise_quote = '';
362 sub sanitise_line_reset {
363 my ($in_comment) = @_;
366 $sanitise_quote = '*/';
368 $sanitise_quote = '';
381 # Always copy over the diff marker.
382 $res = substr($line, 0, 1);
384 for ($off = 1; $off < length($line); $off++) {
385 $c = substr($line, $off, 1);
387 # Comments we are wacking completly including the begin
388 # and end, all to $;.
389 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
390 $sanitise_quote = '*/';
392 substr($res, $off, 2, "$;$;");
396 if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
397 $sanitise_quote = '';
398 substr($res, $off, 2, "$;$;");
402 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '//') {
403 $sanitise_quote = '//';
405 substr($res, $off, 2, $sanitise_quote);
410 # A \ in a string means ignore the next character.
411 if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
413 substr($res, $off, 2, 'XX');
418 if ($c eq "'" || $c eq '"') {
419 if ($sanitise_quote eq '') {
420 $sanitise_quote = $c;
422 substr($res, $off, 1, $c);
424 } elsif ($sanitise_quote eq $c) {
425 $sanitise_quote = '';
429 #print "c<$c> SQ<$sanitise_quote>\n";
430 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
431 substr($res, $off, 1, $;);
432 } elsif ($off != 0 && $sanitise_quote eq '//' && $c ne "\t") {
433 substr($res, $off, 1, $;);
434 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
435 substr($res, $off, 1, 'X');
437 substr($res, $off, 1, $c);
441 if ($sanitise_quote eq '//') {
442 $sanitise_quote = '';
445 # The pathname on a #include may be surrounded by '<' and '>'.
446 if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
447 my $clean = 'X' x length($1);
448 $res =~ s@\<.*\>@<$clean>@;
450 # The whole of a #error is a string.
451 } elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
452 my $clean = 'X' x length($1);
453 $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
459 sub ctx_statement_block {
460 my ($linenr, $remain, $off) = @_;
461 my $line = $linenr - 1;
478 @stack = (['', 0]) if ($#stack == -1);
480 #warn "CSB: blk<$blk> remain<$remain>\n";
481 # If we are about to drop off the end, pull in more
484 for (; $remain > 0; $line++) {
485 last if (!defined $lines[$line]);
486 next if ($lines[$line] =~ /^-/);
489 $blk .= $lines[$line] . "\n";
494 # Bail if there is no further context.
495 #warn "CSB: blk<$blk> off<$off> len<$len>\n";
501 $c = substr($blk, $off, 1);
502 $remainder = substr($blk, $off);
504 #warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
506 # Handle nested #if/#else.
507 if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
508 push(@stack, [ $type, $level ]);
509 } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
510 ($type, $level) = @{$stack[$#stack - 1]};
511 } elsif ($remainder =~ /^#\s*endif\b/) {
512 ($type, $level) = @{pop(@stack)};
515 # Statement ends at the ';' or a close '}' at the
517 if ($level == 0 && $c eq ';') {
521 # An else is really a conditional as long as its not else if
522 if ($level == 0 && $coff_set == 0 &&
523 (!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
524 $remainder =~ /^(else)(?:\s|{)/ &&
525 $remainder !~ /^else\s+if\b/) {
526 $coff = $off + length($1) - 1;
528 #warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
529 #warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
532 if (($type eq '' || $type eq '(') && $c eq '(') {
536 if ($type eq '(' && $c eq ')') {
538 $type = ($level != 0)? '(' : '';
540 if ($level == 0 && $coff < $soff) {
543 #warn "CSB: mark coff<$coff>\n";
546 if (($type eq '' || $type eq '{') && $c eq '{') {
550 if ($type eq '{' && $c eq '}') {
552 $type = ($level != 0)? '{' : '';
560 # We are truly at the end, so shuffle to the next line.
567 my $statement = substr($blk, $soff, $off - $soff + 1);
568 my $condition = substr($blk, $soff, $coff - $soff + 1);
570 #warn "STATEMENT<$statement>\n";
571 #warn "CONDITION<$condition>\n";
573 #print "coff<$coff> soff<$off> loff<$loff>\n";
575 return ($statement, $condition,
576 $line, $remain + 1, $off - $loff + 1, $level);
579 sub statement_lines {
582 # Strip the diff line prefixes and rip blank lines at start and end.
583 $stmt =~ s/(^|\n)./$1/g;
587 my @stmt_lines = ($stmt =~ /\n/g);
589 return $#stmt_lines + 2;
592 sub statement_rawlines {
595 my @stmt_lines = ($stmt =~ /\n/g);
597 return $#stmt_lines + 2;
600 sub statement_block_size {
603 $stmt =~ s/(^|\n)./$1/g;
609 my @stmt_lines = ($stmt =~ /\n/g);
610 my @stmt_statements = ($stmt =~ /;/g);
612 my $stmt_lines = $#stmt_lines + 2;
613 my $stmt_statements = $#stmt_statements + 1;
615 if ($stmt_lines > $stmt_statements) {
618 return $stmt_statements;
622 sub ctx_statement_full {
623 my ($linenr, $remain, $off) = @_;
624 my ($statement, $condition, $level);
628 # Grab the first conditional/block pair.
629 ($statement, $condition, $linenr, $remain, $off, $level) =
630 ctx_statement_block($linenr, $remain, $off);
631 #print "F: c<$condition> s<$statement> remain<$remain>\n";
632 push(@chunks, [ $condition, $statement ]);
633 if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
634 return ($level, $linenr, @chunks);
637 # Pull in the following conditional/block pairs and see if they
638 # could continue the statement.
640 ($statement, $condition, $linenr, $remain, $off, $level) =
641 ctx_statement_block($linenr, $remain, $off);
642 #print "C: c<$condition> s<$statement> remain<$remain>\n";
643 last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
645 push(@chunks, [ $condition, $statement ]);
648 return ($level, $linenr, @chunks);
652 my ($linenr, $remain, $outer, $open, $close, $off) = @_;
654 my $start = $linenr - 1;
661 my @stack = ($level);
662 for ($line = $start; $remain > 0; $line++) {
663 next if ($rawlines[$line] =~ /^-/);
666 $blk .= $rawlines[$line];
668 # Handle nested #if/#else.
669 if ($rawlines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
670 push(@stack, $level);
671 } elsif ($rawlines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
672 $level = $stack[$#stack - 1];
673 } elsif ($rawlines[$line] =~ /^.\s*#\s*endif\b/) {
674 $level = pop(@stack);
677 foreach my $c (split(//, $rawlines[$line])) {
678 ##print "C<$c>L<$level><$open$close>O<$off>\n";
684 if ($c eq $close && $level > 0) {
686 last if ($level == 0);
687 } elsif ($c eq $open) {
692 if (!$outer || $level <= 1) {
693 push(@res, $rawlines[$line]);
696 last if ($level == 0);
699 return ($level, @res);
701 sub ctx_block_outer {
702 my ($linenr, $remain) = @_;
704 my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
708 my ($linenr, $remain) = @_;
710 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
714 my ($linenr, $remain, $off) = @_;
716 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
719 sub ctx_block_level {
720 my ($linenr, $remain) = @_;
722 return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
724 sub ctx_statement_level {
725 my ($linenr, $remain, $off) = @_;
727 return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
730 sub ctx_locate_comment {
731 my ($first_line, $end_line) = @_;
733 # Catch a comment on the end of the line itself.
734 my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@);
735 return $current_comment if (defined $current_comment);
737 # Look through the context and try and figure out if there is a
740 $current_comment = '';
741 for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
742 my $line = $rawlines[$linenr - 1];
744 if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
747 if ($line =~ m@/\*@) {
750 if (!$in_comment && $current_comment ne '') {
751 $current_comment = '';
753 $current_comment .= $line . "\n" if ($in_comment);
754 if ($line =~ m@\*/@) {
759 chomp($current_comment);
760 return($current_comment);
762 sub ctx_has_comment {
763 my ($first_line, $end_line) = @_;
764 my $cmt = ctx_locate_comment($first_line, $end_line);
766 ##print "LINE: $rawlines[$end_line - 1 ]\n";
767 ##print "CMMT: $cmt\n";
773 my ($linenr, $cnt) = @_;
775 my $offset = $linenr - 1;
780 $line = $rawlines[$offset++];
781 next if (defined($line) && $line =~ /^-/);
793 while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
796 $coded = sprintf("^%c", unpack('C', $2) + 64);
805 my $av_preprocessor = 0;
811 $av_preprocessor = 0;
813 @av_paren_type = ('E');
814 $av_pend_colon = 'O';
817 sub annotate_values {
818 my ($stream, $type) = @_;
821 my $var = '_' x length($stream);
824 print "$stream\n" if ($dbg_values > 1);
826 while (length($cur)) {
827 @av_paren_type = ('E') if ($#av_paren_type < 0);
828 print " <" . join('', @av_paren_type) .
829 "> <$type> <$av_pending>" if ($dbg_values > 1);
830 if ($cur =~ /^(\s+)/o) {
831 print "WS($1)\n" if ($dbg_values > 1);
832 if ($1 =~ /\n/ && $av_preprocessor) {
833 $type = pop(@av_paren_type);
834 $av_preprocessor = 0;
837 } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\()/) {
838 print "DECLARE($1)\n" if ($dbg_values > 1);
841 } elsif ($cur =~ /^($Modifier)\s*/) {
842 print "MODIFIER($1)\n" if ($dbg_values > 1);
845 } elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) {
846 print "DEFINE($1,$2)\n" if ($dbg_values > 1);
847 $av_preprocessor = 1;
848 push(@av_paren_type, $type);
854 } elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) {
855 print "UNDEF($1)\n" if ($dbg_values > 1);
856 $av_preprocessor = 1;
857 push(@av_paren_type, $type);
859 } elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) {
860 print "PRE_START($1)\n" if ($dbg_values > 1);
861 $av_preprocessor = 1;
863 push(@av_paren_type, $type);
864 push(@av_paren_type, $type);
867 } elsif ($cur =~ /^(\#\s*(?:else|elif))/o) {
868 print "PRE_RESTART($1)\n" if ($dbg_values > 1);
869 $av_preprocessor = 1;
871 push(@av_paren_type, $av_paren_type[$#av_paren_type]);
875 } elsif ($cur =~ /^(\#\s*(?:endif))/o) {
876 print "PRE_END($1)\n" if ($dbg_values > 1);
878 $av_preprocessor = 1;
880 # Assume all arms of the conditional end as this
881 # one does, and continue as if the #endif was not here.
883 push(@av_paren_type, $type);
886 } elsif ($cur =~ /^(\\\n)/o) {
887 print "PRECONT($1)\n" if ($dbg_values > 1);
889 } elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
890 print "ATTR($1)\n" if ($dbg_values > 1);
894 } elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
895 print "SIZEOF($1)\n" if ($dbg_values > 1);
901 } elsif ($cur =~ /^(if|while|for)\b/o) {
902 print "COND($1)\n" if ($dbg_values > 1);
906 } elsif ($cur =~/^(case)/o) {
907 print "CASE($1)\n" if ($dbg_values > 1);
908 $av_pend_colon = 'C';
911 } elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) {
912 print "KEYWORD($1)\n" if ($dbg_values > 1);
915 } elsif ($cur =~ /^(\()/o) {
916 print "PAREN('$1')\n" if ($dbg_values > 1);
917 push(@av_paren_type, $av_pending);
921 } elsif ($cur =~ /^(\))/o) {
922 my $new_type = pop(@av_paren_type);
923 if ($new_type ne '_') {
925 print "PAREN('$1') -> $type\n"
926 if ($dbg_values > 1);
928 print "PAREN('$1')\n" if ($dbg_values > 1);
931 } elsif ($cur =~ /^($Ident)\s*\(/o) {
932 print "FUNC($1)\n" if ($dbg_values > 1);
936 } elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) {
937 if (defined $2 && $type eq 'C' || $type eq 'T') {
938 $av_pend_colon = 'B';
939 } elsif ($type eq 'E') {
940 $av_pend_colon = 'L';
942 print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1);
945 } elsif ($cur =~ /^($Ident|$Constant)/o) {
946 print "IDENT($1)\n" if ($dbg_values > 1);
949 } elsif ($cur =~ /^($Assignment)/o) {
950 print "ASSIGN($1)\n" if ($dbg_values > 1);
953 } elsif ($cur =~/^(;|{|})/) {
954 print "END($1)\n" if ($dbg_values > 1);
956 $av_pend_colon = 'O';
958 } elsif ($cur =~/^(,)/) {
959 print "COMMA($1)\n" if ($dbg_values > 1);
962 } elsif ($cur =~ /^(\?)/o) {
963 print "QUESTION($1)\n" if ($dbg_values > 1);
966 } elsif ($cur =~ /^(:)/o) {
967 print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1);
969 substr($var, length($res), 1, $av_pend_colon);
970 if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') {
975 $av_pend_colon = 'O';
977 } elsif ($cur =~ /^(\[)/o) {
978 print "CLOSE($1)\n" if ($dbg_values > 1);
981 } elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) {
984 print "OPV($1)\n" if ($dbg_values > 1);
991 substr($var, length($res), 1, $variant);
994 } elsif ($cur =~ /^($Operators)/o) {
995 print "OP($1)\n" if ($dbg_values > 1);
996 if ($1 ne '++' && $1 ne '--') {
1000 } elsif ($cur =~ /(^.)/o) {
1001 print "C($1)\n" if ($dbg_values > 1);
1004 $cur = substr($cur, length($1));
1005 $res .= $type x length($1);
1009 return ($res, $var);
1013 my ($possible, $line) = @_;
1014 my $notPermitted = qr{(?:
1029 ^(?:typedef|struct|enum)\b
1031 warn "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
1032 if ($possible !~ $notPermitted) {
1033 # Check for modifiers.
1034 $possible =~ s/\s*$Storage\s*//g;
1035 $possible =~ s/\s*$Sparse\s*//g;
1036 if ($possible =~ /^\s*$/) {
1038 } elsif ($possible =~ /\s/) {
1039 $possible =~ s/\s*$Type\s*//g;
1040 for my $modifier (split(' ', $possible)) {
1041 if ($modifier !~ $notPermitted) {
1042 warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
1043 push(@modifierList, $modifier);
1048 warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
1049 push(@typeList, $possible);
1053 warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1);
1060 if (defined $tst_only && $_[0] !~ /\Q$tst_only\E/) {
1063 my $line = $prefix . $_[0];
1065 $line = (split('\n', $line))[0] . "\n" if ($terse);
1067 push(our @report, $line);
1075 if (report("ERROR: $_[0]\n")) {
1081 if (report("WARNING: $_[0]\n")) {
1087 if ($check && report("CHECK: $_[0]\n")) {
1093 sub check_absolute_file {
1094 my ($absolute, $herecurr) = @_;
1095 my $file = $absolute;
1097 ##print "absolute<$absolute>\n";
1099 # See if any suffix of this path is a path within the tree.
1100 while ($file =~ s@^[^/]*/@@) {
1101 if (-f "$root/$file") {
1102 ##print "file<$file>\n";
1110 # It is, so see if the prefix is acceptable.
1111 my $prefix = $absolute;
1112 substr($prefix, -length($file)) = '';
1114 ##print "prefix<$prefix>\n";
1115 if ($prefix ne ".../") {
1116 WARN("use relative pathname instead of absolute in changelog text\n" . $herecurr);
1121 my $filename = shift;
1127 my $stashrawline="";
1144 # Trace the real file/line as we go.
1150 my $comment_edge = 0;
1154 my $prev_values = 'E';
1157 my %suppress_ifbraces;
1158 my %suppress_whiletrailers;
1159 my %suppress_export;
1161 # Pre-scan the patch sanitizing the lines.
1162 # Pre-scan the patch looking for any __setup documentation.
1164 my @setup_docs = ();
1167 sanitise_line_reset();
1169 foreach my $rawline (@rawlines) {
1173 if ($rawline=~/^\+\+\+\s+(\S+)/) {
1175 if ($1 =~ m@Documentation/kernel-parameters.txt$@) {
1180 if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
1189 # Guestimate if this is a continuing comment. Run
1190 # the context looking for a comment "edge". If this
1191 # edge is a close comment then we must be in a comment
1195 for (my $ln = $linenr + 1; $cnt > 0; $ln++) {
1196 next if (defined $rawlines[$ln - 1] &&
1197 $rawlines[$ln - 1] =~ /^-/);
1199 #print "RAW<$rawlines[$ln - 1]>\n";
1200 last if (!defined $rawlines[$ln - 1]);
1201 if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
1202 $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
1207 if (defined $edge && $edge eq '*/') {
1211 # Guestimate if this is a continuing comment. If this
1212 # is the start of a diff block and this line starts
1213 # ' *' then it is very likely a comment.
1214 if (!defined $edge &&
1215 $rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@)
1220 ##print "COMMENT:$in_comment edge<$edge> $rawline\n";
1221 sanitise_line_reset($in_comment);
1223 } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
1224 # Standardise the strings and chars within the input to
1225 # simplify matching -- only bother with positive lines.
1226 $line = sanitise_line($rawline);
1228 push(@lines, $line);
1231 $realcnt-- if ($line =~ /^(?:\+| |$)/);
1236 #print "==>$rawline\n";
1237 #print "-->$line\n";
1239 if ($setup_docs && $line =~ /^\+/) {
1240 push(@setup_docs, $line);
1248 foreach my $line (@lines) {
1251 my $rawline = $rawlines[$linenr - 1];
1253 #extract the line range in the file after the patch is applied
1254 if ($line=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
1256 $first_line = $linenr + 1;
1266 %suppress_ifbraces = ();
1267 %suppress_whiletrailers = ();
1268 %suppress_export = ();
1271 # track the line number as we move through the hunk, note that
1272 # new versions of GNU diff omit the leading space on completely
1273 # blank context lines so we need to count that too.
1274 } elsif ($line =~ /^( |\+|$)/) {
1276 $realcnt-- if ($realcnt != 0);
1278 # Measure the line length and indent.
1279 ($length, $indent) = line_stats($rawline);
1281 # Track the previous line.
1282 ($prevline, $stashline) = ($stashline, $line);
1283 ($previndent, $stashindent) = ($stashindent, $indent);
1284 ($prevrawline, $stashrawline) = ($stashrawline, $rawline);
1286 #warn "line<$line>\n";
1288 } elsif ($realcnt == 1) {
1292 my $hunk_line = ($realcnt != 0);
1294 #make up the handle for any error we report on this line
1295 $prefix = "$filename:$realline: " if ($emacs && $file);
1296 $prefix = "$filename:$linenr: " if ($emacs && !$file);
1298 $here = "#$linenr: " if (!$file);
1299 $here = "#$realline: " if ($file);
1301 # extract the filename as it passes
1302 if ($line=~/^\+\+\+\s+(\S+)/) {
1304 $realfile =~ s@^([^/]*)/@@;
1307 if (!$file && $tree && $p1_prefix ne '' &&
1308 -e "$root/$p1_prefix") {
1309 WARN("patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
1312 if ($realfile =~ m@^include/asm/@) {
1313 ERROR("do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
1318 $here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
1320 my $hereline = "$here\n$rawline\n";
1321 my $herecurr = "$here\n$rawline\n";
1322 my $hereprev = "$here\n$prevrawline\n$rawline\n";
1324 $cnt_lines++ if ($realcnt != 0);
1326 #check the patch for a signoff:
1327 if ($line =~ /^\s*signed-off-by:/i) {
1328 # This is a signoff, if ugly, so do not double report.
1330 if (!($line =~ /^\s*Signed-off-by:/)) {
1331 WARN("Signed-off-by: is the preferred form\n" .
1334 if ($line =~ /^\s*signed-off-by:\S/i) {
1335 WARN("space required after Signed-off-by:\n" .
1340 # Check for wrappage within a valid hunk of the file
1341 if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
1342 ERROR("patch seems to be corrupt (line wrapped?)\n" .
1343 $herecurr) if (!$emitted_corrupt++);
1346 # Check for absolute kernel paths.
1348 while ($line =~ m{(?:^|\s)(/\S*)}g) {
1351 if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
1352 check_absolute_file($1, $herecurr)) {
1355 check_absolute_file($file, $herecurr);
1360 # UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
1361 if (($realfile =~ /^$/ || $line =~ /^\+/) &&
1362 $rawline !~ m/^$UTF8*$/) {
1363 my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
1365 my $blank = copy_spacing($rawline);
1366 my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
1367 my $hereptr = "$hereline$ptr\n";
1369 ERROR("Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
1372 # ignore non-hunk lines and lines being removed
1373 next if (!$hunk_line || $line =~ /^-/);
1375 #trailing whitespace
1376 if ($line =~ /^\+.*\015/) {
1377 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1378 ERROR("DOS line endings\n" . $herevet);
1380 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
1381 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1382 ERROR("trailing whitespace\n" . $herevet);
1385 # check we are in a valid source file if not then ignore this hunk
1386 next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
1389 if ($line =~ /^\+/ && $prevrawline !~ /\/\*\*/ &&
1390 $rawline !~ /^.\s*\*\s*\@$Ident\s/ &&
1391 $line !~ /^\+\s*$logFunctions\s*\(\s*(?:KERN_\S+\s*)?"[X\t]*"\s*(?:,|\)\s*;)\s*$/ &&
1394 WARN("line over 80 characters\n" . $herecurr);
1397 # check for adding lines without a newline.
1398 if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
1399 WARN("adding a line without newline at end of file\n" . $herecurr);
1402 # Blackfin: use hi/lo macros
1403 if ($realfile =~ m@arch/blackfin/.*\.S$@) {
1404 if ($line =~ /\.[lL][[:space:]]*=.*&[[:space:]]*0x[fF][fF][fF][fF]/) {
1405 my $herevet = "$here\n" . cat_vet($line) . "\n";
1406 ERROR("use the LO() macro, not (... & 0xFFFF)\n" . $herevet);
1408 if ($line =~ /\.[hH][[:space:]]*=.*>>[[:space:]]*16/) {
1409 my $herevet = "$here\n" . cat_vet($line) . "\n";
1410 ERROR("use the HI() macro, not (... >> 16)\n" . $herevet);
1414 # check we are in a valid source file C or perl if not then ignore this hunk
1415 next if ($realfile !~ /\.(h|c|pl)$/);
1417 # at the beginning of a line any tabs must come first and anything
1418 # more than 8 must use tabs.
1419 if ($rawline =~ /^\+\s* \t\s*\S/ ||
1420 $rawline =~ /^\+\s* \s*/) {
1421 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
1422 ERROR("code indent should use tabs where possible\n" . $herevet);
1425 # check we are in a valid C source file if not then ignore this hunk
1426 next if ($realfile !~ /\.(h|c)$/);
1428 # check for RCS/CVS revision markers
1429 if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
1430 WARN("CVS style keyword markers, these will _not_ be updated\n". $herecurr);
1433 # Blackfin: don't use __builtin_bfin_[cs]sync
1434 if ($line =~ /__builtin_bfin_csync/) {
1435 my $herevet = "$here\n" . cat_vet($line) . "\n";
1436 ERROR("use the CSYNC() macro in asm/blackfin.h\n" . $herevet);
1438 if ($line =~ /__builtin_bfin_ssync/) {
1439 my $herevet = "$here\n" . cat_vet($line) . "\n";
1440 ERROR("use the SSYNC() macro in asm/blackfin.h\n" . $herevet);
1443 # Check for potential 'bare' types
1444 my ($stat, $cond, $line_nr_next, $remain_next, $off_next,
1446 if ($realcnt && $line =~ /.\s*\S/) {
1447 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
1448 ctx_statement_block($linenr, $realcnt, 0);
1449 $stat =~ s/\n./\n /g;
1450 $cond =~ s/\n./\n /g;
1452 # Find the real next line.
1453 $realline_next = $line_nr_next;
1454 if (defined $realline_next &&
1455 (!defined $lines[$realline_next - 1] ||
1456 substr($lines[$realline_next - 1], $off_next) =~ /^\s*$/)) {
1463 # Ignore goto labels.
1464 if ($s =~ /$Ident:\*$/s) {
1466 # Ignore functions being called
1467 } elsif ($s =~ /^.\s*$Ident\s*\(/s) {
1469 } elsif ($s =~ /^.\s*else\b/s) {
1471 # declarations always start with types
1472 } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(?:;|=|,|\()/s) {
1475 possible($type, "A:" . $s);
1477 # definitions in global scope can only start with types
1478 } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) {
1479 possible($1, "B:" . $s);
1482 # any (foo ... *) is a pointer cast, and foo is a type
1483 while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) {
1484 possible($1, "C:" . $s);
1487 # Check for any sort of function declaration.
1488 # int foo(something bar, other baz);
1489 # void (*store_gdt)(x86_descr_ptr *);
1490 if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
1491 my ($name_len) = length($1);
1494 substr($ctx, 0, $name_len + 1, '');
1495 $ctx =~ s/\)[^\)]*$//;
1497 for my $arg (split(/\s*,\s*/, $ctx)) {
1498 if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
1500 possible($1, "D:" . $s);
1508 # Checks which may be anchored in the context.
1511 # Check for switch () and associated case and default
1512 # statements should be at the same indent.
1513 if ($line=~/\bswitch\s*\(.*\)/) {
1516 my @ctx = ctx_block_outer($linenr, $realcnt);
1518 for my $ctx (@ctx) {
1519 my ($clen, $cindent) = line_stats($ctx);
1520 if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
1521 $indent != $cindent) {
1522 $err .= "$sep$ctx\n";
1529 ERROR("switch and case should be at the same indent\n$hereline$err");
1533 # if/while/etc brace do not go on next line, unless defining a do while loop,
1534 # or if that brace on the next line is for something else
1535 if ($line =~ /(.*)\b((?:if|while|for|switch)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) {
1536 my $pre_ctx = "$1$2";
1538 my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
1539 my $ctx_cnt = $realcnt - $#ctx - 1;
1540 my $ctx = join("\n", @ctx);
1542 my $ctx_ln = $linenr;
1543 my $ctx_skip = $realcnt;
1545 while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
1546 defined $lines[$ctx_ln - 1] &&
1547 $lines[$ctx_ln - 1] =~ /^-/)) {
1548 ##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
1549 $ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
1553 #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
1554 #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
1556 if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln -1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
1557 ERROR("that open brace { should be on the previous line\n" .
1558 "$here\n$ctx\n$lines[$ctx_ln - 1]\n");
1560 if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
1561 $ctx =~ /\)\s*\;\s*$/ &&
1562 defined $lines[$ctx_ln - 1])
1564 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
1565 if ($nindent > $indent) {
1566 WARN("trailing semicolon indicates no statements, indent implies otherwise\n" .
1567 "$here\n$ctx\n$lines[$ctx_ln - 1]\n");
1572 # Check relative indent for conditionals and blocks.
1573 if ($line =~ /\b(?:(?:if|while|for)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
1574 my ($s, $c) = ($stat, $cond);
1576 substr($s, 0, length($c), '');
1578 # Make sure we remove the line prefixes as we have
1579 # none on the first line, and are going to readd them
1583 # Find out how long the conditional actually is.
1584 my @newlines = ($c =~ /\n/gs);
1585 my $cond_lines = 1 + $#newlines;
1587 # We want to check the first line inside the block
1588 # starting at the end of the conditional, so remove:
1589 # 1) any blank line termination
1590 # 2) any opening brace { on end of the line
1592 my $continuation = 0;
1594 $s =~ s/^.*\bdo\b//;
1596 if ($s =~ s/^\s*\\//) {
1599 if ($s =~ s/^\s*?\n//) {
1604 # Also ignore a loop construct at the end of a
1605 # preprocessor statement.
1606 if (($prevline =~ /^.\s*#\s*define\s/ ||
1607 $prevline =~ /\\\s*$/) && $continuation == 0) {
1613 while ($cond_ptr != $cond_lines) {
1614 $cond_ptr = $cond_lines;
1616 # If we see an #else/#elif then the code
1618 if ($s =~ /^\s*\#\s*(?:else|elif)/) {
1623 # 1) blank lines, they should be at 0,
1624 # 2) preprocessor lines, and
1626 if ($continuation ||
1628 $s =~ /^\s*#\s*?/ ||
1629 $s =~ /^\s*$Ident\s*:/) {
1630 $continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
1631 if ($s =~ s/^.*?\n//) {
1637 my (undef, $sindent) = line_stats("+" . $s);
1638 my $stat_real = raw_line($linenr, $cond_lines);
1640 # Check if either of these lines are modified, else
1641 # this is not this patch's fault.
1642 if (!defined($stat_real) ||
1643 $stat !~ /^\+/ && $stat_real !~ /^\+/) {
1646 if (defined($stat_real) && $cond_lines > 1) {
1647 $stat_real = "[...]\n$stat_real";
1650 #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";
1652 if ($check && (($sindent % 8) != 0 ||
1653 ($sindent <= $indent && $s ne ''))) {
1654 WARN("suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
1658 # Track the 'values' across context and added lines.
1659 my $opline = $line; $opline =~ s/^./ /;
1660 my ($curr_values, $curr_vars) =
1661 annotate_values($opline . "\n", $prev_values);
1662 $curr_values = $prev_values . $curr_values;
1664 my $outline = $opline; $outline =~ s/\t/ /g;
1665 print "$linenr > .$outline\n";
1666 print "$linenr > $curr_values\n";
1667 print "$linenr > $curr_vars\n";
1669 $prev_values = substr($curr_values, -1);
1671 #ignore lines not being added
1672 if ($line=~/^[^\+]/) {next;}
1674 # TEST: allow direct testing of the type matcher.
1676 if ($line =~ /^.\s*$Declare\s*$/) {
1677 ERROR("TEST: is type\n" . $herecurr);
1678 } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
1679 ERROR("TEST: is not type ($1 is)\n". $herecurr);
1683 # TEST: allow direct testing of the attribute matcher.
1685 if ($line =~ /^.\s*$Modifier\s*$/) {
1686 ERROR("TEST: is attr\n" . $herecurr);
1687 } elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
1688 ERROR("TEST: is not attr ($1 is)\n". $herecurr);
1693 # check for initialisation to aggregates open brace on the next line
1694 if ($line =~ /^.\s*{/ &&
1695 $prevline =~ /(?:^|[^=])=\s*$/) {
1696 ERROR("that open brace { should be on the previous line\n" . $hereprev);
1700 # Checks which are anchored on the added line.
1703 # check for malformed paths in #include statements (uses RAW line)
1704 if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
1706 if ($path =~ m{//}) {
1707 ERROR("malformed #include filename\n" .
1712 # no C99 // comments
1713 if ($line =~ m{//}) {
1714 ERROR("do not use C99 // comments\n" . $herecurr);
1716 # Remove C99 comments.
1718 $opline =~ s@//.*@@;
1720 # EXPORT_SYMBOL should immediately follow the thing it is exporting, consider
1721 # the whole statement.
1722 #print "APW <$lines[$realline_next - 1]>\n";
1723 if (defined $realline_next &&
1724 exists $lines[$realline_next - 1] &&
1725 !defined $suppress_export{$realline_next} &&
1726 ($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
1727 $lines[$realline_next - 1] =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
1731 ^.DEFINE_$Ident\(\Q$name\E\)|
1732 ^.DECLARE_$Ident\(\Q$name\E\)|
1733 ^.LIST_HEAD\(\Q$name\E\)|
1734 ^.(?:$Storage\s+)?$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
1735 \b\Q$name\E(?:\s+$Attribute)*\s*(?:;|=|\[|\()
1737 #print "FOO A<$lines[$realline_next - 1]> stat<$stat> name<$name>\n";
1738 $suppress_export{$realline_next} = 2;
1740 $suppress_export{$realline_next} = 1;
1743 if (!defined $suppress_export{$linenr} &&
1744 $prevline =~ /^.\s*$/ &&
1745 ($line =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
1746 $line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
1747 #print "FOO B <$lines[$linenr - 1]>\n";
1748 $suppress_export{$linenr} = 2;
1750 if (defined $suppress_export{$linenr} &&
1751 $suppress_export{$linenr} == 2) {
1752 WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
1755 # check for external initialisers.
1756 if ($line =~ /^.$Type\s*$Ident\s*(?:\s+$Modifier)*\s*=\s*(0|NULL|false)\s*;/) {
1757 ERROR("do not initialise externals to 0 or NULL\n" .
1760 # check for static initialisers.
1761 if ($line =~ /\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
1762 ERROR("do not initialise statics to 0 or NULL\n" .
1766 # check for new typedefs, only function parameters and sparse annotations
1768 if ($line =~ /\btypedef\s/ &&
1769 $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
1770 $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
1771 $line !~ /\b$typeTypedefs\b/ &&
1772 $line !~ /\b__bitwise(?:__|)\b/) {
1773 WARN("do not add new typedefs\n" . $herecurr);
1776 # * goes on variable not on type
1778 if ($line =~ m{\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\)}) {
1779 my ($from, $to) = ($1, $1);
1781 # Should start with a space.
1782 $to =~ s/^(\S)/ $1/;
1783 # Should not end with a space.
1785 # '*'s should not have spaces between.
1786 while ($to =~ s/\*\s+\*/\*\*/) {
1789 #print "from<$from> to<$to>\n";
1791 ERROR("\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr);
1793 } elsif ($line =~ m{\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident)}) {
1794 my ($from, $to, $ident) = ($1, $1, $2);
1796 # Should start with a space.
1797 $to =~ s/^(\S)/ $1/;
1798 # Should not end with a space.
1800 # '*'s should not have spaces between.
1801 while ($to =~ s/\*\s+\*/\*\*/) {
1803 # Modifiers should have spaces.
1804 $to =~ s/(\b$Modifier$)/$1 /;
1806 #print "from<$from> to<$to> ident<$ident>\n";
1807 if ($from ne $to && $ident !~ /^$Modifier$/) {
1808 ERROR("\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr);
1812 # # no BUG() or BUG_ON()
1813 # if ($line =~ /\b(BUG|BUG_ON)\b/) {
1814 # print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
1815 # print "$herecurr";
1819 if ($line =~ /\bLINUX_VERSION_CODE\b/) {
1820 WARN("LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
1823 # printk should use KERN_* levels. Note that follow on printk's on the
1824 # same line do not need a level, so we use the current block context
1825 # to try and find and validate the current printk. In summary the current
1826 # printk includes all preceeding printk's which have no newline on the end.
1827 # we assume the first bad printk is the one to report.
1828 if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
1830 for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
1831 #print "CHECK<$lines[$ln - 1]\n";
1832 # we have a preceeding printk if it ends
1833 # with "\n" ignore it, else it is to blame
1834 if ($lines[$ln - 1] =~ m{\bprintk\(}) {
1835 if ($rawlines[$ln - 1] !~ m{\\n"}) {
1842 WARN("printk() should include KERN_ facility level\n" . $herecurr);
1846 # function brace can't be on same line, except for #defines of do while,
1847 # or if closed on same line
1848 if (($line=~/$Type\s*$Ident\(.*\).*\s{/) and
1849 !($line=~/\#\s*define.*do\s{/) and !($line=~/}/)) {
1850 ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
1853 # open braces for enum, union and struct go on the same line.
1854 if ($line =~ /^.\s*{/ &&
1855 $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
1856 ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
1859 # check for spacing round square brackets; allowed:
1860 # 1. with a type on the left -- int [] a;
1861 # 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
1862 # 3. inside a curly brace -- = { [0...10] = 5 }
1863 while ($line =~ /(.*?\s)\[/g) {
1864 my ($where, $prefix) = ($-[1], $1);
1865 if ($prefix !~ /$Type\s+$/ &&
1866 ($where != 0 || $prefix !~ /^.\s+$/) &&
1867 $prefix !~ /{\s+$/) {
1868 ERROR("space prohibited before open square bracket '['\n" . $herecurr);
1872 # check for spaces between functions and their parentheses.
1873 while ($line =~ /($Ident)\s+\(/g) {
1875 my $ctx_before = substr($line, 0, $-[1]);
1876 my $ctx = "$ctx_before$name";
1878 # Ignore those directives where spaces _are_ permitted.
1880 if|for|while|switch|return|case|
1881 volatile|__volatile__|
1882 __attribute__|format|__extension__|
1886 # cpp #define statements have non-optional spaces, ie
1887 # if there is a space between the name and the open
1888 # parenthesis it is simply not a parameter group.
1889 } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
1891 # cpp #elif statement condition may start with a (
1892 } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
1894 # If this whole things ends with a type its most
1895 # likely a typedef for a function.
1896 } elsif ($ctx =~ /$Type$/) {
1899 WARN("space prohibited between function name and open parenthesis '('\n" . $herecurr);
1902 # Check operator spacing.
1903 if (!($line=~/\#\s*include/)) {
1905 <<=|>>=|<=|>=|==|!=|
1906 \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
1907 =>|->|<<|>>|<|>|=|!|~|
1908 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
1911 my @elements = split(/($ops|;)/, $opline);
1914 my $blank = copy_spacing($opline);
1916 for (my $n = 0; $n < $#elements; $n += 2) {
1917 $off += length($elements[$n]);
1919 # Pick up the preceeding and succeeding characters.
1920 my $ca = substr($opline, 0, $off);
1922 if (length($opline) >= ($off + length($elements[$n + 1]))) {
1923 $cc = substr($opline, $off + length($elements[$n + 1]));
1925 my $cb = "$ca$;$cc";
1928 $a = 'V' if ($elements[$n] ne '');
1929 $a = 'W' if ($elements[$n] =~ /\s$/);
1930 $a = 'C' if ($elements[$n] =~ /$;$/);
1931 $a = 'B' if ($elements[$n] =~ /(\[|\()$/);
1932 $a = 'O' if ($elements[$n] eq '');
1933 $a = 'E' if ($ca =~ /^\s*$/);
1935 my $op = $elements[$n + 1];
1938 if (defined $elements[$n + 2]) {
1939 $c = 'V' if ($elements[$n + 2] ne '');
1940 $c = 'W' if ($elements[$n + 2] =~ /^\s/);
1941 $c = 'C' if ($elements[$n + 2] =~ /^$;/);
1942 $c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
1943 $c = 'O' if ($elements[$n + 2] eq '');
1944 $c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
1949 my $ctx = "${a}x${c}";
1951 my $at = "(ctx:$ctx)";
1953 my $ptr = substr($blank, 0, $off) . "^";
1954 my $hereptr = "$hereline$ptr\n";
1956 # Pull out the value of this operator.
1957 my $op_type = substr($curr_values, $off + 1, 1);
1959 # Get the full operator variant.
1960 my $opv = $op . substr($curr_vars, $off, 1);
1962 # Ignore operators passed as parameters.
1963 if ($op_type ne 'V' &&
1964 $ca =~ /\s$/ && $cc =~ /^\s*,/) {
1967 # } elsif ($op =~ /^$;+$/) {
1969 # ; should have either the end of line or a space or \ after it
1970 } elsif ($op eq ';') {
1971 if ($ctx !~ /.x[WEBC]/ &&
1972 $cc !~ /^\\/ && $cc !~ /^;/) {
1973 ERROR("space required after that '$op' $at\n" . $hereptr);
1977 } elsif ($op eq '//') {
1981 # : when part of a bitfield
1982 } elsif ($op eq '->' || $opv eq ':B') {
1983 if ($ctx =~ /Wx.|.xW/) {
1984 ERROR("spaces prohibited around that '$op' $at\n" . $hereptr);
1987 # , must have a space on the right.
1988 } elsif ($op eq ',') {
1989 if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
1990 ERROR("space required after that '$op' $at\n" . $hereptr);
1993 # '*' as part of a type definition -- reported already.
1994 } elsif ($opv eq '*_') {
1995 #warn "'*' is part of type\n";
1997 # unary operators should have a space before and
1998 # none after. May be left adjacent to another
1999 # unary operator, or a cast
2000 } elsif ($op eq '!' || $op eq '~' ||
2001 $opv eq '*U' || $opv eq '-U' ||
2002 $opv eq '&U' || $opv eq '&&U') {
2003 if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
2004 ERROR("space required before that '$op' $at\n" . $hereptr);
2006 if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
2007 # A unary '*' may be const
2009 } elsif ($ctx =~ /.xW/) {
2010 ERROR("space prohibited after that '$op' $at\n" . $hereptr);
2013 # unary ++ and unary -- are allowed no space on one side.
2014 } elsif ($op eq '++' or $op eq '--') {
2015 if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
2016 ERROR("space required one side of that '$op' $at\n" . $hereptr);
2018 if ($ctx =~ /Wx[BE]/ ||
2019 ($ctx =~ /Wx./ && $cc =~ /^;/)) {
2020 ERROR("space prohibited before that '$op' $at\n" . $hereptr);
2022 if ($ctx =~ /ExW/) {
2023 ERROR("space prohibited after that '$op' $at\n" . $hereptr);
2027 # << and >> may either have or not have spaces both sides
2028 } elsif ($op eq '<<' or $op eq '>>' or
2029 $op eq '&' or $op eq '^' or $op eq '|' or
2030 $op eq '+' or $op eq '-' or
2031 $op eq '*' or $op eq '/' or
2034 if ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
2035 ERROR("need consistent spacing around '$op' $at\n" .
2039 # A colon needs no spaces before when it is
2040 # terminating a case value or a label.
2041 } elsif ($opv eq ':C' || $opv eq ':L') {
2042 if ($ctx =~ /Wx./) {
2043 ERROR("space prohibited before that '$op' $at\n" . $hereptr);
2046 # All the others need spaces both sides.
2047 } elsif ($ctx !~ /[EWC]x[CWE]/) {
2050 # Ignore email addresses <foo@bar>
2052 $cc =~ /^\S+\@\S+>/) ||
2054 $ca =~ /<\S+\@\S+$/))
2060 if (($opv eq ':O' && $ca =~ /\?$/) ||
2061 ($op eq '?' && $cc =~ /^:/)) {
2066 ERROR("spaces required around that '$op' $at\n" . $hereptr);
2069 $off += length($elements[$n + 1]);
2073 # check for multiple assignments
2074 if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
2075 CHK("multiple assignments should be avoided\n" . $herecurr);
2078 ## # check for multiple declarations, allowing for a function declaration
2080 ## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
2081 ## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
2083 ## # Remove any bracketed sections to ensure we do not
2084 ## # falsly report the parameters of functions.
2086 ## while ($ln =~ s/\([^\(\)]*\)//g) {
2088 ## if ($ln =~ /,/) {
2089 ## WARN("declaring multiple variables together should be avoided\n" . $herecurr);
2093 #need space before brace following if, while, etc
2094 if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
2096 ERROR("space required before the open brace '{'\n" . $herecurr);
2099 # closing brace should have a space following it when it has anything
2101 if ($line =~ /}(?!(?:,|;|\)))\S/) {
2102 ERROR("space required after that close brace '}'\n" . $herecurr);
2105 # check spacing on square brackets
2106 if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
2107 ERROR("space prohibited after that open square bracket '['\n" . $herecurr);
2109 if ($line =~ /\s\]/) {
2110 ERROR("space prohibited before that close square bracket ']'\n" . $herecurr);
2113 # check spacing on parentheses
2114 if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
2115 $line !~ /for\s*\(\s+;/) {
2116 ERROR("space prohibited after that open parenthesis '('\n" . $herecurr);
2118 if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
2119 $line !~ /for\s*\(.*;\s+\)/ &&
2120 $line !~ /:\s+\)/) {
2121 ERROR("space prohibited before that close parenthesis ')'\n" . $herecurr);
2124 #goto labels aren't indented, allow a single space however
2125 if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
2126 !($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
2127 WARN("labels should not be indented\n" . $herecurr);
2130 # Return is not a function.
2131 if (defined($stat) && $stat =~ /^.\s*return(\s*)(\(.*);/s) {
2135 # Flatten any parentheses
2136 $value =~ s/\)\(/\) \(/g;
2137 while ($value =~ s/\[[^\{\}]*\]/1/ ||
2138 $value !~ /(?:$Ident|-?$Constant)\s*
2140 (?:$Ident|-?$Constant)/x &&
2141 $value =~ s/\([^\(\)]*\)/1/) {
2144 if ($value =~ /^(?:$Ident|-?$Constant)$/) {
2145 ERROR("return is not a function, parentheses are not required\n" . $herecurr);
2147 } elsif ($spacing !~ /\s+/) {
2148 ERROR("space required before the open parenthesis '('\n" . $herecurr);
2152 # Need a space before open parenthesis after if, while etc
2153 if ($line=~/\b(if|while|for|switch)\(/) {
2154 ERROR("space required before the open parenthesis '('\n" . $herecurr);
2157 # Check for illegal assignment in if conditional -- and check for trailing
2158 # statements after the conditional.
2159 if ($line =~ /do\s*(?!{)/) {
2160 my ($stat_next) = ctx_statement_block($line_nr_next,
2161 $remain_next, $off_next);
2162 $stat_next =~ s/\n./\n /g;
2163 ##print "stat<$stat> stat_next<$stat_next>\n";
2165 if ($stat_next =~ /^\s*while\b/) {
2166 # If the statement carries leading newlines,
2167 # then count those as offsets.
2169 ($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
2171 statement_rawlines($whitespace) - 1;
2173 $suppress_whiletrailers{$line_nr_next +
2177 if (!defined $suppress_whiletrailers{$linenr} &&
2178 $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
2179 my ($s, $c) = ($stat, $cond);
2181 if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
2182 ERROR("do not use assignment in if condition\n" . $herecurr);
2185 # Find out what is on the end of the line after the
2187 substr($s, 0, length($c), '');
2189 $s =~ s/$;//g; # Remove any comments
2190 if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
2191 $c !~ /}\s*while\s*/)
2193 # Find out how long the conditional actually is.
2194 my @newlines = ($c =~ /\n/gs);
2195 my $cond_lines = 1 + $#newlines;
2198 $stat_real = raw_line($linenr, $cond_lines)
2199 . "\n" if ($cond_lines);
2200 if (defined($stat_real) && $cond_lines > 1) {
2201 $stat_real = "[...]\n$stat_real";
2204 ERROR("trailing statements should be on next line\n" . $herecurr . $stat_real);
2208 # Check for bitwise tests written as boolean
2220 WARN("boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
2223 # if and else should not have general statements after it
2224 if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
2226 $s =~ s/$;//g; # Remove any comments
2227 if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
2228 ERROR("trailing statements should be on next line\n" . $herecurr);
2231 # if should not continue a brace
2232 if ($line =~ /}\s*if\b/) {
2233 ERROR("trailing statements should be on next line\n" .
2236 # case and default should not have general statements after them
2237 if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
2239 (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
2243 ERROR("trailing statements should be on next line\n" . $herecurr);
2246 # Check for }<nl>else {, these must be at the same
2247 # indent level to be relevant to each other.
2248 if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
2249 $previndent == $indent) {
2250 ERROR("else should follow close brace '}'\n" . $hereprev);
2253 if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ and
2254 $previndent == $indent) {
2255 my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
2257 # Find out what is on the end of the line after the
2259 substr($s, 0, length($c), '');
2262 if ($s =~ /^\s*;/) {
2263 ERROR("while should follow close brace '}'\n" . $hereprev);
2267 #studly caps, commented out until figure out how to distinguish between use of existing and adding new
2268 # if (($line=~/[\w_][a-z\d]+[A-Z]/) and !($line=~/print/)) {
2269 # print "No studly caps, use _\n";
2270 # print "$herecurr";
2274 #no spaces allowed after \ in define
2275 if ($line=~/\#\s*define.*\\\s$/) {
2276 WARN("Whitepspace after \\ makes next lines useless\n" . $herecurr);
2279 #warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
2280 if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
2282 my $checkfile = "include/linux/$file";
2283 if (-f "$root/$checkfile" &&
2284 $realfile ne $checkfile &&
2287 if ($realfile =~ m{^arch/}) {
2288 CHK("Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
2290 WARN("Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
2295 # multi-statement macros should be enclosed in a do while loop, grab the
2296 # first statement and ensure its the whole macro if its not enclosed
2297 # in a known good container
2298 if ($realfile !~ m@/vmlinux.lds.h$@ &&
2299 $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
2302 my ($off, $dstat, $dcond, $rest);
2305 my $args = defined($1);
2307 # Find the end of the macro and limit our statement
2309 while ($cnt > 0 && defined $lines[$ln - 1] &&
2310 $lines[$ln - 1] =~ /^(?:-|..*\\$)/)
2312 $ctx .= $rawlines[$ln - 1] . "\n";
2313 $cnt-- if ($lines[$ln - 1] !~ /^-/);
2316 $ctx .= $rawlines[$ln - 1];
2318 ($dstat, $dcond, $ln, $cnt, $off) =
2319 ctx_statement_block($linenr, $ln - $linenr + 1, 0);
2320 #print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
2321 #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
2323 # Extract the remainder of the define (if any) and
2324 # rip off surrounding spaces, and trailing \'s.
2326 while ($off != 0 || ($cnt > 0 && $rest =~ /\\\s*$/)) {
2327 #print "ADDING cnt<$cnt> $off <" . substr($lines[$ln - 1], $off) . "> rest<$rest>\n";
2328 if ($off != 0 || $lines[$ln - 1] !~ /^-/) {
2329 $rest .= substr($lines[$ln - 1], $off) . "\n";
2335 $rest =~ s/\\\n.//g;
2339 # Clean up the original statement.
2341 substr($dstat, 0, length($dcond), '');
2343 $dstat =~ s/^.\s*\#\s*define\s+$Ident\s*//;
2346 $dstat =~ s/\\\n.//g;
2347 $dstat =~ s/^\s*//s;
2348 $dstat =~ s/\s*$//s;
2350 # Flatten any parentheses and braces
2351 while ($dstat =~ s/\([^\(\)]*\)/1/ ||
2352 $dstat =~ s/\{[^\{\}]*\}/1/ ||
2353 $dstat =~ s/\[[^\{\}]*\]/1/)
2357 my $exceptions = qr{
2369 #print "REST<$rest> dstat<$dstat>\n";
2371 if ($rest !~ /while\s*\(/ &&
2372 $dstat !~ /$exceptions/)
2374 ERROR("Macros with multiple statements should be enclosed in a do - while loop\n" . "$here\n$ctx\n");
2377 } elsif ($ctx !~ /;/) {
2379 $dstat !~ /^(?:$Ident|-?$Constant)$/ &&
2380 $dstat !~ /$exceptions/ &&
2381 $dstat !~ /^\.$Ident\s*=/ &&
2382 $dstat =~ /$Operators/)
2384 ERROR("Macros with complex values should be enclosed in parenthesis\n" . "$here\n$ctx\n");
2389 # make sure symbols are always wrapped with VMLINUX_SYMBOL() ...
2390 # all assignments may have only one of the following with an assignment:
2393 # VMLINUX_SYMBOL(...)
2394 if ($realfile eq 'vmlinux.lds.h' && $line =~ /(?:(?:^|\s)$Ident\s*=|=\s*$Ident(?:\s|$))/) {
2395 WARN("vmlinux.lds.h needs VMLINUX_SYMBOL() around C-visible symbols\n" . $herecurr);
2398 # check for redundant bracing round if etc
2399 if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
2400 my ($level, $endln, @chunks) =
2401 ctx_statement_full($linenr, $realcnt, 1);
2402 #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
2403 #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
2404 if ($#chunks > 0 && $level == 0) {
2407 my $herectx = $here . "\n";
2408 my $ln = $linenr - 1;
2409 for my $chunk (@chunks) {
2410 my ($cond, $block) = @{$chunk};
2412 # If the condition carries leading newlines, then count those as offsets.
2413 my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
2414 my $offset = statement_rawlines($whitespace) - 1;
2416 #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
2418 # We have looked at and allowed this specific line.
2419 $suppress_ifbraces{$ln + $offset} = 1;
2421 $herectx .= "$rawlines[$ln + $offset]\n[...]\n";
2422 $ln += statement_rawlines($block) - 1;
2424 substr($block, 0, length($cond), '');
2426 $seen++ if ($block =~ /^\s*{/);
2428 #print "cond<$cond> block<$block> allowed<$allowed>\n";
2429 if (statement_lines($cond) > 1) {
2430 #print "APW: ALLOWED: cond<$cond>\n";
2433 if ($block =~/\b(?:if|for|while)\b/) {
2434 #print "APW: ALLOWED: block<$block>\n";
2437 if (statement_block_size($block) > 1) {
2438 #print "APW: ALLOWED: lines block<$block>\n";
2442 if ($seen && !$allowed) {
2443 WARN("braces {} are not necessary for any arm of this statement\n" . $herectx);
2447 if (!defined $suppress_ifbraces{$linenr - 1} &&
2448 $line =~ /\b(if|while|for|else)\b/) {
2451 # Check the pre-context.
2452 if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
2453 #print "APW: ALLOWED: pre<$1>\n";
2457 my ($level, $endln, @chunks) =
2458 ctx_statement_full($linenr, $realcnt, $-[0]);
2460 # Check the condition.
2461 my ($cond, $block) = @{$chunks[0]};
2462 #print "CHECKING<$linenr> cond<$cond> block<$block>\n";
2463 if (defined $cond) {
2464 substr($block, 0, length($cond), '');
2466 if (statement_lines($cond) > 1) {
2467 #print "APW: ALLOWED: cond<$cond>\n";
2470 if ($block =~/\b(?:if|for|while)\b/) {
2471 #print "APW: ALLOWED: block<$block>\n";
2474 if (statement_block_size($block) > 1) {
2475 #print "APW: ALLOWED: lines block<$block>\n";
2478 # Check the post-context.
2479 if (defined $chunks[1]) {
2480 my ($cond, $block) = @{$chunks[1]};
2481 if (defined $cond) {
2482 substr($block, 0, length($cond), '');
2484 if ($block =~ /^\s*\{/) {
2485 #print "APW: ALLOWED: chunk-1 block<$block>\n";
2489 if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
2490 my $herectx = $here . "\n";;
2491 my $cnt = statement_rawlines($block);
2493 for (my $n = 0; $n < $cnt; $n++) {
2494 $herectx .= raw_line($linenr, $n) . "\n";;
2497 WARN("braces {} are not necessary for single statement blocks\n" . $herectx);
2501 # don't include deprecated include files (uses RAW line)
2502 for my $inc (@dep_includes) {
2503 if ($rawline =~ m@^.\s*\#\s*include\s*\<$inc>@) {
2504 ERROR("Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n" . $herecurr);
2508 # don't use deprecated functions
2509 for my $func (@dep_functions) {
2510 if ($line =~ /\b$func\b/) {
2511 ERROR("Don't use $func(): see Documentation/feature-removal-schedule.txt\n" . $herecurr);
2515 # no volatiles please
2516 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
2517 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
2518 WARN("Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
2521 # SPIN_LOCK_UNLOCKED & RW_LOCK_UNLOCKED are deprecated
2522 if ($line =~ /\b(SPIN_LOCK_UNLOCKED|RW_LOCK_UNLOCKED)/) {
2523 ERROR("Use of $1 is deprecated: see Documentation/spinlocks.txt\n" . $herecurr);
2527 if ($line =~ /^.\s*\#\s*if\s+0\b/) {
2528 CHK("if this code is redundant consider removing it\n" .
2532 # check for needless kfree() checks
2533 if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
2535 if ($line =~ /\bkfree\(\Q$expr\E\);/) {
2536 WARN("kfree(NULL) is safe this check is probably not required\n" . $hereprev);
2539 # check for needless usb_free_urb() checks
2540 if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
2542 if ($line =~ /\busb_free_urb\(\Q$expr\E\);/) {
2543 WARN("usb_free_urb(NULL) is safe this check is probably not required\n" . $hereprev);
2547 # warn about #ifdefs in C files
2548 # if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
2549 # print "#ifdef in C files should be avoided\n";
2550 # print "$herecurr";
2554 # warn about spacing in #ifdefs
2555 if ($line =~ /^.\s*\#\s*(ifdef|ifndef|elif)\s\s+/) {
2556 ERROR("exactly one space required after that #$1\n" . $herecurr);
2559 # check for spinlock_t definitions without a comment.
2560 if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ ||
2561 $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
2563 if (!ctx_has_comment($first_line, $linenr)) {
2564 CHK("$1 definition without comment\n" . $herecurr);
2567 # check for memory barriers without a comment.
2568 if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
2569 if (!ctx_has_comment($first_line, $linenr)) {
2570 CHK("memory barrier without comment\n" . $herecurr);
2573 # check of hardware specific defines
2574 if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
2575 CHK("architecture specific defines should be avoided\n" . $herecurr);
2578 # check the location of the inline attribute, that it is between
2579 # storage class and type.
2580 if ($line =~ /\b$Type\s+$Inline\b/ ||
2581 $line =~ /\b$Inline\s+$Storage\b/) {
2582 ERROR("inline keyword should sit between storage class and type\n" . $herecurr);
2585 # Check for __inline__ and __inline, prefer inline
2586 if ($line =~ /\b(__inline__|__inline)\b/) {
2587 WARN("plain inline is preferred over $1\n" . $herecurr);
2590 # check for sizeof(&)
2591 if ($line =~ /\bsizeof\s*\(\s*\&/) {
2592 WARN("sizeof(& should be avoided\n" . $herecurr);
2595 # check for new externs in .c files.
2596 if ($realfile =~ /\.c$/ && defined $stat &&
2597 $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
2599 my $function_name = $1;
2600 my $paren_space = $2;
2603 if (defined $cond) {
2604 substr($s, 0, length($cond), '');
2606 if ($s =~ /^\s*;/ &&
2607 $function_name ne 'uninitialized_var')
2609 WARN("externs should be avoided in .c files\n" . $herecurr);
2612 if ($paren_space =~ /\n/) {
2613 WARN("arguments for function declarations should follow identifier\n" . $herecurr);
2616 } elsif ($realfile =~ /\.c$/ && defined $stat &&
2617 $stat =~ /^.\s*extern\s+/)
2619 WARN("externs should be avoided in .c files\n" . $herecurr);
2622 # checks for new __setup's
2623 if ($rawline =~ /\b__setup\("([^"]*)"/) {
2626 if (!grep(/$name/, @setup_docs)) {
2627 CHK("__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
2631 # check for pointless casting of kmalloc return
2632 if ($line =~ /\*\s*\)\s*k[czm]alloc\b/) {
2633 WARN("unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
2636 # check for gcc specific __FUNCTION__
2637 if ($line =~ /__FUNCTION__/) {
2638 WARN("__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr);
2641 # check for semaphores used as mutexes
2642 if ($line =~ /^.\s*(DECLARE_MUTEX|init_MUTEX)\s*\(/) {
2643 WARN("mutexes are preferred for single holder semaphores\n" . $herecurr);
2645 # check for semaphores used as mutexes
2646 if ($line =~ /^.\s*init_MUTEX_LOCKED\s*\(/) {
2647 WARN("consider using a completion\n" . $herecurr);
2649 # recommend strict_strto* over simple_strto*
2650 if ($line =~ /\bsimple_(strto.*?)\s*\(/) {
2651 WARN("consider using strict_$1 in preference to simple_$1\n" . $herecurr);
2653 # check for __initcall(), use device_initcall() explicitly please
2654 if ($line =~ /^.\s*__initcall\s*\(/) {
2655 WARN("please use device_initcall() instead of __initcall()\n" . $herecurr);
2657 # check for various ops structs, ensure they are const.
2658 my $struct_ops = qr{acpi_dock_ops|
2659 address_space_operations|
2661 block_device_operations|
2666 file_lock_operations|
2676 lock_manager_operations|
2682 pipe_buf_operations|
2683 platform_hibernation_ops|
2684 platform_suspend_ops|
2689 soc_pcmcia_socket_ops|
2695 if ($line !~ /\bconst\b/ &&
2696 $line =~ /\bstruct\s+($struct_ops)\b/) {
2697 WARN("struct $1 should normally be const\n" .
2701 # use of NR_CPUS is usually wrong
2702 # ignore definitions of NR_CPUS and usage to define arrays as likely right
2703 if ($line =~ /\bNR_CPUS\b/ &&
2704 $line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ &&
2705 $line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ &&
2706 $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
2707 $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
2708 $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/)
2710 WARN("usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
2713 # check for %L{u,d,i} in strings
2715 while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
2716 $string = substr($rawline, $-[1], $+[1] - $-[1]);
2717 $string =~ s/%%/__/g;
2718 if ($string =~ /(?<!%)%L[udi]/) {
2719 WARN("\%Ld/%Lu are not-standard C, use %lld/%llu\n" . $herecurr);
2724 # whine mightly about in_atomic
2725 if ($line =~ /\bin_atomic\s*\(/) {
2726 if ($realfile =~ m@^drivers/@) {
2727 ERROR("do not use in_atomic in drivers\n" . $herecurr);
2728 } elsif ($realfile !~ m@^kernel/@) {
2729 WARN("use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
2734 # If we have no input at all, then there is nothing to report on
2735 # so just keep quiet.
2736 if ($#rawlines == -1) {
2740 # In mailback mode only produce a report in the negative, for
2741 # things that appear to be patches.
2742 if ($mailback && ($clean == 1 || !$is_patch)) {
2746 # This is not a patch, and we are are in 'no-patch' mode so
2748 if (!$chk_patch && !$is_patch) {
2753 ERROR("Does not appear to be a unified-diff format patch\n");
2755 if ($is_patch && $chk_signoff && $signoff == 0) {
2756 ERROR("Missing Signed-off-by: line(s)\n");
2759 print report_dump();
2760 if ($summary && !($clean == 1 && $quiet == 1)) {
2761 print "$filename " if ($summary_file);
2762 print "total: $cnt_error errors, $cnt_warn warnings, " .
2763 (($check)? "$cnt_chk checks, " : "") .
2764 "$cnt_lines lines checked\n";
2765 print "\n" if ($quiet == 0);
2768 if ($clean == 1 && $quiet == 0) {
2769 print "$vname has no obvious style problems and is ready for submission.\n"
2771 if ($clean == 0 && $quiet == 0) {
2772 print "$vname has style problems, please review. If any of these errors\n";
2773 print "are false positives report them to the maintainer, see\n";
2774 print "CHECKPATCH in MAINTAINERS.\n";