mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-08 17:49:45 +00:00
653d4876b7
This version brings a some new tests, and a host of changes to fix
false positives, of particular note:
- detect 'var ++;' and 'var --;' as a bad combination
- multistatement #defines are now checked based on statement count
- multistatement #defines with initialisation correctly reported
- checks the location of the inline keywords
- EXPORT_SYMBOL for variables are now understood
- typedefs are loosened to handle sparse etc
This version of checkpatch.pl can be found at the following URL:
http://www.shadowen.org/~apw/public/checkpatch/checkpatch.pl-0.05
Full Changelog:
Andy Whitcroft (18):
Version: 0.05
macro definition checks should be for a single statement
avoid assignements only in if conditionals
declarations of function pointers need no space
multiline macros which are purely initialisation cannot be wrapped
EXPORT_SYMBOL can also directly follow a variable definition
check on the location of the inline keyword
EXPORT_SYMBOL needs to allow for attributes
ensure we do not find C99 // in strings
handle malformed #include lines
accept the {0,} form
typedefs are sensible for defining function pointer parameters
ensure { handling correctly handles nested switch() statements
trailing whitespace checks are not anchored
typedefs for sparse bitwise annotations make sense
update the type matcher to include sparse annotations
clean up indent and spacing
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
943 lines
24 KiB
Perl
Executable file
943 lines
24 KiB
Perl
Executable file
#!/usr/bin/perl -w
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# (c) 2001, Dave Jones. <davej@codemonkey.org.uk> (the file handling bit)
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# (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
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# (c) 2007, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite, etc)
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# Licensed under the terms of the GNU GPL License version 2
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use strict;
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my $P = $0;
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$P =~ s@.*/@@g;
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my $V = '0.05';
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use Getopt::Long qw(:config no_auto_abbrev);
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my $quiet = 0;
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my $tree = 1;
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my $chk_signoff = 1;
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my $chk_patch = 1;
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my $tst_type = 0;
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GetOptions(
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'q|quiet' => \$quiet,
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'tree!' => \$tree,
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'signoff!' => \$chk_signoff,
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'patch!' => \$chk_patch,
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'test-type!' => \$tst_type,
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) or exit;
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my $exit = 0;
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if ($#ARGV < 0) {
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print "usage: $P [options] patchfile\n";
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print "version: $V\n";
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print "options: -q => quiet\n";
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print " --no-tree => run without a kernel tree\n";
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exit(1);
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}
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if ($tree && !top_of_kernel_tree()) {
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print "Must be run from the top-level dir. of a kernel tree\n";
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exit(2);
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}
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my @dep_includes = ();
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my @dep_functions = ();
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my $removal = 'Documentation/feature-removal-schedule.txt';
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if ($tree && -f $removal) {
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open(REMOVE, "<$removal") || die "$P: $removal: open failed - $!\n";
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while (<REMOVE>) {
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if (/^Files:\s+(.*\S)/) {
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for my $file (split(/[, ]+/, $1)) {
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if ($file =~ m@include/(.*)@) {
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push(@dep_includes, $1);
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}
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}
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} elsif (/^Funcs:\s+(.*\S)/) {
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for my $func (split(/[, ]+/, $1)) {
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push(@dep_functions, $func);
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}
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}
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}
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}
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my @rawlines = ();
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while (<>) {
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chomp;
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push(@rawlines, $_);
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if (eof(ARGV)) {
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if (!process($ARGV, @rawlines)) {
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$exit = 1;
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}
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@rawlines = ();
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}
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}
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exit($exit);
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sub top_of_kernel_tree {
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if ((-f "COPYING") && (-f "CREDITS") && (-f "Kbuild") &&
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(-f "MAINTAINERS") && (-f "Makefile") && (-f "README") &&
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(-d "Documentation") && (-d "arch") && (-d "include") &&
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(-d "drivers") && (-d "fs") && (-d "init") && (-d "ipc") &&
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(-d "kernel") && (-d "lib") && (-d "scripts")) {
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return 1;
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}
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return 0;
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}
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sub expand_tabs {
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my ($str) = @_;
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my $res = '';
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my $n = 0;
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for my $c (split(//, $str)) {
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if ($c eq "\t") {
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$res .= ' ';
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$n++;
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for (; ($n % 8) != 0; $n++) {
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$res .= ' ';
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}
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next;
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}
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$res .= $c;
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$n++;
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}
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return $res;
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}
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sub line_stats {
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my ($line) = @_;
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# Drop the diff line leader and expand tabs
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$line =~ s/^.//;
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$line = expand_tabs($line);
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# Pick the indent from the front of the line.
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my ($white) = ($line =~ /^(\s*)/);
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return (length($line), length($white));
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}
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sub sanitise_line {
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my ($line) = @_;
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my $res = '';
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my $l = '';
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my $quote = '';
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foreach my $c (split(//, $line)) {
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if ($l ne "\\" && ($c eq "'" || $c eq '"')) {
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if ($quote eq '') {
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$quote = $c;
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$res .= $c;
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$l = $c;
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next;
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} elsif ($quote eq $c) {
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$quote = '';
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}
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}
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if ($quote && $c ne "\t") {
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$res .= "X";
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} else {
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$res .= $c;
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}
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$l = $c;
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}
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return $res;
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}
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sub ctx_block_get {
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my ($linenr, $remain, $outer, $open, $close) = @_;
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my $line;
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my $start = $linenr - 1;
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my $blk = '';
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my @o;
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my @c;
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my @res = ();
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for ($line = $start; $remain > 0; $line++) {
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next if ($rawlines[$line] =~ /^-/);
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$remain--;
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$blk .= $rawlines[$line];
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@o = ($blk =~ /$open/g);
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@c = ($blk =~ /$close/g);
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if (!$outer || (scalar(@o) - scalar(@c)) == 1) {
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push(@res, $rawlines[$line]);
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}
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last if (scalar(@o) == scalar(@c));
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}
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return @res;
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}
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sub ctx_block_outer {
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my ($linenr, $remain) = @_;
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return ctx_block_get($linenr, $remain, 1, '\{', '\}');
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}
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sub ctx_block {
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my ($linenr, $remain) = @_;
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return ctx_block_get($linenr, $remain, 0, '\{', '\}');
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}
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sub ctx_statement {
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my ($linenr, $remain) = @_;
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return ctx_block_get($linenr, $remain, 0, '\(', '\)');
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}
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sub ctx_locate_comment {
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my ($first_line, $end_line) = @_;
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# Catch a comment on the end of the line itself.
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my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*$@);
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return $current_comment if (defined $current_comment);
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# Look through the context and try and figure out if there is a
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# comment.
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my $in_comment = 0;
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$current_comment = '';
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for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
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my $line = $rawlines[$linenr - 1];
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#warn " $line\n";
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if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
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$in_comment = 1;
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}
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if ($line =~ m@/\*@) {
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$in_comment = 1;
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}
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if (!$in_comment && $current_comment ne '') {
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$current_comment = '';
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}
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$current_comment .= $line . "\n" if ($in_comment);
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if ($line =~ m@\*/@) {
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$in_comment = 0;
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}
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}
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chomp($current_comment);
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return($current_comment);
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}
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sub ctx_has_comment {
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my ($first_line, $end_line) = @_;
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my $cmt = ctx_locate_comment($first_line, $end_line);
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##print "LINE: $rawlines[$end_line - 1 ]\n";
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##print "CMMT: $cmt\n";
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return ($cmt ne '');
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}
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sub cat_vet {
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my ($vet) = @_;
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$vet =~ s/\t/^I/;
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$vet =~ s/$/\$/;
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return $vet;
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}
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sub process {
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my $filename = shift;
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my @lines = @_;
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my $linenr=0;
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my $prevline="";
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my $stashline="";
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my $length;
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my $indent;
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my $previndent=0;
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my $stashindent=0;
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my $clean = 1;
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my $signoff = 0;
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my $is_patch = 0;
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# Trace the real file/line as we go.
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my $realfile = '';
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my $realline = 0;
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my $realcnt = 0;
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my $here = '';
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my $in_comment = 0;
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my $first_line = 0;
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my $ident = '[A-Za-z\d_]+';
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my $storage = '(?:extern|static)';
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my $sparse = '(?:__user|__kernel|__force|__iomem)';
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my $type = '(?:unsigned\s+)?' .
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'(?:void|char|short|int|long|unsigned|float|double|' .
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'long\s+long|' .
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"struct\\s+${ident}|" .
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"union\\s+${ident}|" .
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"${ident}_t)" .
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"(?:\\s+$sparse)*" .
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'(?:\s*\*+)?';
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my $attribute = '(?:__read_mostly|__init|__initdata)';
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my $Ident = $ident;
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my $Type = $type;
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my $Storage = $storage;
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my $Declare = "(?:$storage\\s+)?$type";
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my $Attribute = $attribute;
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foreach my $line (@lines) {
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$linenr++;
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my $rawline = $line;
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#extract the filename as it passes
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if ($line=~/^\+\+\+\s+(\S+)/) {
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$realfile=$1;
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$realfile =~ s@^[^/]*/@@;
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$in_comment = 0;
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next;
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}
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#extract the line range in the file after the patch is applied
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if ($line=~/^\@\@ -\d+,\d+ \+(\d+)(,(\d+))? \@\@/) {
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$is_patch = 1;
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$first_line = $linenr + 1;
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$in_comment = 0;
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$realline=$1-1;
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if (defined $2) {
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$realcnt=$3+1;
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} else {
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$realcnt=1+1;
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}
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next;
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}
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# track the line number as we move through the hunk, note that
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# new versions of GNU diff omit the leading space on completely
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# blank context lines so we need to count that too.
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if ($line =~ /^( |\+|$)/) {
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$realline++;
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# track any sort of multi-line comment. Obviously if
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# the added text or context do not include the whole
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# comment we will not see it. Such is life.
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#
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# Guestimate if this is a continuing comment. If this
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# is the start of a diff block and this line starts
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# ' *' then it is very likely a comment.
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if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
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$in_comment = 1;
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}
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if ($line =~ m@/\*@) {
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$in_comment = 1;
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}
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if ($line =~ m@\*/@) {
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$in_comment = 0;
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}
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# Measure the line length and indent.
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($length, $indent) = line_stats($line);
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# Track the previous line.
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($prevline, $stashline) = ($stashline, $line);
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($previndent, $stashindent) = ($stashindent, $indent);
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}
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$realcnt-- if ($realcnt != 0);
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#make up the handle for any error we report on this line
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$here = "#$linenr: ";
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$here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
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my $hereline = "$here\n$line\n";
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my $herecurr = "$here\n$line\n\n";
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my $hereprev = "$here\n$prevline\n$line\n\n";
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#check the patch for a signoff:
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if ($line =~ /^\s*Signed-off-by:\s/) {
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$signoff++;
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} elsif ($line =~ /^\s*signed-off-by:/i) {
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# This is a signoff, if ugly, so do not double report.
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$signoff++;
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if (!($line =~ /^\s*Signed-off-by:/)) {
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print "use Signed-off-by:\n";
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print "$herecurr";
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$clean = 0;
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}
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if ($line =~ /^\s*signed-off-by:\S/i) {
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print "need space after Signed-off-by:\n";
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print "$herecurr";
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$clean = 0;
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}
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}
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# Check for wrappage within a valid hunk of the file
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if ($realcnt != 0 && $line !~ m{^(?:\+|-| |$)}) {
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print "patch seems to be corrupt (line wrapped?) [$realcnt]\n";
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print "$herecurr";
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$clean = 0;
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}
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#ignore lines being removed
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if ($line=~/^-/) {next;}
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# check we are in a valid source file if not then ignore this hunk
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next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
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#trailing whitespace
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if ($line=~/^\+.*\S\s+$/) {
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my $herevet = "$here\n" . cat_vet($line) . "\n\n";
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print "trailing whitespace\n";
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print "$herevet";
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$clean = 0;
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}
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#80 column limit
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if ($line =~ /^\+/ && !($prevline=~/\/\*\*/) && $length > 80) {
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print "line over 80 characters\n";
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print "$herecurr";
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$clean = 0;
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}
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# check we are in a valid source file *.[hc] if not then ignore this hunk
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next if ($realfile !~ /\.[hc]$/);
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# at the beginning of a line any tabs must come first and anything
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# more than 8 must use tabs.
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if ($line=~/^\+\s* \t\s*\S/ or $line=~/^\+\s* \s*/) {
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my $herevet = "$here\n" . cat_vet($line) . "\n\n";
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print "use tabs not spaces\n";
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print "$herevet";
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$clean = 0;
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}
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#
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# The rest of our checks refer specifically to C style
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# only apply those _outside_ comments.
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#
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next if ($in_comment);
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# Remove comments from the line before processing.
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$line =~ s@/\*.*\*/@@g;
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$line =~ s@/\*.*@@;
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$line =~ s@.*\*/@@;
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# Standardise the strings and chars within the input to simplify matching.
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$line = sanitise_line($line);
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#
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# Checks which may be anchored in the context.
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#
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# Check for switch () and associated case and default
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# statements should be at the same indent.
|
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if ($line=~/\bswitch\s*\(.*\)/) {
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my $err = '';
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my $sep = '';
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my @ctx = ctx_block_outer($linenr, $realcnt);
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shift(@ctx);
|
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for my $ctx (@ctx) {
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my ($clen, $cindent) = line_stats($ctx);
|
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if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
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$indent != $cindent) {
|
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$err .= "$sep$ctx\n";
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$sep = '';
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} else {
|
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$sep = "[...]\n";
|
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}
|
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}
|
|
if ($err ne '') {
|
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print "switch and case should be at the same indent\n";
|
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print "$here\n$line\n$err\n";
|
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$clean = 0;
|
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}
|
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}
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|
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#ignore lines not being added
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if ($line=~/^[^\+]/) {next;}
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|
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# TEST: allow direct testing of the type matcher.
|
|
if ($tst_type && $line =~ /^.$Declare$/) {
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print "TEST: is type $Declare\n";
|
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print "$herecurr";
|
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$clean = 0;
|
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next;
|
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}
|
|
|
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#
|
|
# Checks which are anchored on the added line.
|
|
#
|
|
|
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# check for malformed paths in #include statements (uses RAW line)
|
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if ($rawline =~ m{^.#\s*include\s+[<"](.*)[">]}) {
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my $path = $1;
|
|
if ($path =~ m{//}) {
|
|
print "malformed #include filename\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
# Sanitise this special form of string.
|
|
$path = 'X' x length($path);
|
|
$line =~ s{\<.*\>}{<$path>};
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|
}
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|
|
# no C99 // comments
|
|
if ($line =~ m{//}) {
|
|
print "do not use C99 // comments\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
# Remove C99 comments.
|
|
$line =~ s@//.*@@;
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|
|
#EXPORT_SYMBOL should immediately follow its function closing }.
|
|
if (($line =~ /EXPORT_SYMBOL.*\((.*)\)/) ||
|
|
($line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
|
|
my $name = $1;
|
|
if (($prevline !~ /^}/) &&
|
|
($prevline !~ /^\+}/) &&
|
|
($prevline !~ /^ }/) &&
|
|
($prevline !~ /\s$name(?:\s+$Attribute)?\s*(?:;|=)/)) {
|
|
print "EXPORT_SYMBOL(foo); should immediately follow its function/variable\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# check for static initialisers.
|
|
if ($line=~/\s*static\s.*=\s+(0|NULL);/) {
|
|
print "do not initialise statics to 0 or NULL\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# check for new typedefs, only function parameters and sparse annotations
|
|
# make sense.
|
|
if ($line =~ /\btypedef\s/ &&
|
|
$line !~ /\btypedef\s+$Type\s+\(\s*$Ident\s*\)\s*\(/ &&
|
|
$line !~ /\b__bitwise(?:__|)\b/) {
|
|
print "do not add new typedefs\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# * goes on variable not on type
|
|
if ($line =~ m{[A-Za-z\d_]+(\*+) [A-Za-z\d_]+}) {
|
|
print "\"foo$1 bar\" should be \"foo $1bar\"\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
if ($line =~ m{$Type (\*) [A-Za-z\d_]+} ||
|
|
$line =~ m{[A-Za-z\d_]+ (\*\*+) [A-Za-z\d_]+}) {
|
|
print "\"foo $1 bar\" should be \"foo $1bar\"\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
if ($line =~ m{\([A-Za-z\d_\s]+[A-Za-z\d_](\*+)\)}) {
|
|
print "\"(foo$1)\" should be \"(foo $1)\"\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
if ($line =~ m{\([A-Za-z\d_\s]+[A-Za-z\d_]\s+(\*+)\s+\)}) {
|
|
print "\"(foo $1 )\" should be \"(foo $1)\"\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# # no BUG() or BUG_ON()
|
|
# if ($line =~ /\b(BUG|BUG_ON)\b/) {
|
|
# print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
|
|
# print "$herecurr";
|
|
# $clean = 0;
|
|
# }
|
|
|
|
# printk should use KERN_* levels. Note that follow on printk's on the
|
|
# same line do not need a level, so we use the current block context
|
|
# to try and find and validate the current printk. In summary the current
|
|
# printk includes all preceeding printk's which have no newline on the end.
|
|
# we assume the first bad printk is the one to report.
|
|
if ($line =~ /\bprintk\((?!KERN_)/) {
|
|
my $ok = 0;
|
|
for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
|
|
#print "CHECK<$lines[$ln - 1]\n";
|
|
# we have a preceeding printk if it ends
|
|
# with "\n" ignore it, else it is to blame
|
|
if ($lines[$ln - 1] =~ m{\bprintk\(}) {
|
|
if ($rawlines[$ln - 1] !~ m{\\n"}) {
|
|
$ok = 1;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
if ($ok == 0) {
|
|
print "printk() should include KERN_ facility level\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# function brace can't be on same line, except for #defines of do while,
|
|
# or if closed on same line
|
|
if (($line=~/[A-Za-z\d_]+\**\s+\**[A-Za-z\d_]+\(.*\).* {/) and
|
|
!($line=~/\#define.*do\s{/) and !($line=~/}/)) {
|
|
print "braces following function declarations go on the next line\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# Check operator spacing.
|
|
# Note we expand the line with the leading + as the real
|
|
# line will be displayed with the leading + and the tabs
|
|
# will therefore also expand that way.
|
|
my $opline = $line;
|
|
$opline = expand_tabs($opline);
|
|
$opline =~ s/^./ /;
|
|
if (!($line=~/\#\s*include/)) {
|
|
my @elements = split(/(<<=|>>=|<=|>=|==|!=|\+=|-=|\*=|\/=|%=|\^=|\|=|&=|->|<<|>>|<|>|=|!|~|&&|\|\||,|\^|\+\+|--|;|&|\||\+|-|\*|\/\/|\/)/, $opline);
|
|
my $off = 0;
|
|
for (my $n = 0; $n < $#elements; $n += 2) {
|
|
$off += length($elements[$n]);
|
|
|
|
my $a = '';
|
|
$a = 'V' if ($elements[$n] ne '');
|
|
$a = 'W' if ($elements[$n] =~ /\s$/);
|
|
$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
|
|
$a = 'O' if ($elements[$n] eq '');
|
|
$a = 'E' if ($elements[$n] eq '' && $n == 0);
|
|
|
|
my $op = $elements[$n + 1];
|
|
|
|
my $c = '';
|
|
if (defined $elements[$n + 2]) {
|
|
$c = 'V' if ($elements[$n + 2] ne '');
|
|
$c = 'W' if ($elements[$n + 2] =~ /^\s/);
|
|
$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
|
|
$c = 'O' if ($elements[$n + 2] eq '');
|
|
} else {
|
|
$c = 'E';
|
|
}
|
|
|
|
# Pick up the preceeding and succeeding characters.
|
|
my $ca = substr($opline, $off - 1, 1);
|
|
my $cc = '';
|
|
if (length($opline) >= ($off + length($elements[$n + 1]))) {
|
|
$cc = substr($opline, $off + length($elements[$n + 1]), 1);
|
|
}
|
|
|
|
my $ctx = "${a}x${c}";
|
|
|
|
my $at = "(ctx:$ctx)";
|
|
|
|
my $ptr = (" " x $off) . "^";
|
|
my $hereptr = "$hereline$ptr\n\n";
|
|
|
|
##print "<$s1:$op:$s2> <$elements[$n]:$elements[$n + 1]:$elements[$n + 2]>\n";
|
|
|
|
# We need ; as an operator. // is a comment.
|
|
if ($op eq ';' or $op eq '//') {
|
|
|
|
# -> should have no spaces
|
|
} elsif ($op eq '->') {
|
|
if ($ctx =~ /Wx.|.xW/) {
|
|
print "no spaces around that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# , must have a space on the right.
|
|
} elsif ($op eq ',') {
|
|
if ($ctx !~ /.xW|.xE/ && $cc ne '}') {
|
|
print "need space after that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# unary ! and unary ~ are allowed no space on the right
|
|
} elsif ($op eq '!' or $op eq '~') {
|
|
if ($ctx !~ /[WOEB]x./) {
|
|
print "need space before that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
if ($ctx =~ /.xW/) {
|
|
print "no space after that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# unary ++ and unary -- are allowed no space on one side.
|
|
} elsif ($op eq '++' or $op eq '--') {
|
|
if ($ctx !~ /[WOB]x[^W]/ && $ctx !~ /[^W]x[WOB]/) {
|
|
print "need space one side of that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
if ($ctx =~ /Wx./ && $cc eq ';') {
|
|
print "no space before that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# & is both unary and binary
|
|
# unary:
|
|
# a &b
|
|
# binary (consistent spacing):
|
|
# a&b OK
|
|
# a & b OK
|
|
#
|
|
# boiling down to: if there is a space on the right then there
|
|
# should be one on the left.
|
|
#
|
|
# - is the same
|
|
#
|
|
} elsif ($op eq '&' or $op eq '-') {
|
|
if ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]/) {
|
|
print "need space before that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# * is the same as & only adding:
|
|
# type:
|
|
# (foo *)
|
|
# (foo **)
|
|
#
|
|
} elsif ($op eq '*') {
|
|
if ($ca eq '*') {
|
|
if ($cc =~ /\s/) {
|
|
print "no space after that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
} elsif ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]|OxV|WxB|BxB/) {
|
|
print "need space before that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# << and >> may either have or not have spaces both sides
|
|
} elsif ($op eq '<<' or $op eq '>>' or $op eq '+' or $op eq '/' or
|
|
$op eq '^' or $op eq '|')
|
|
{
|
|
if ($ctx !~ /VxV|WxW|VxE|WxE/) {
|
|
print "need consistent spacing around '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# All the others need spaces both sides.
|
|
} elsif ($ctx !~ /[EW]x[WE]/) {
|
|
print "need spaces around that '$op' $at\n";
|
|
print "$hereptr";
|
|
$clean = 0;
|
|
}
|
|
$off += length($elements[$n + 1]);
|
|
}
|
|
}
|
|
|
|
#need space before brace following if, while, etc
|
|
if ($line=~/\(.*\){/) {
|
|
print "need a space before the brace\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
#goto labels aren't indented, allow a single space however
|
|
if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
|
|
!($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
|
|
print "labels should not be indented\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# Need a space before open parenthesis after if, while etc
|
|
if ($line=~/\b(if|while|for|switch)\(/) {
|
|
print "need a space before the open parenthesis\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# Check for illegal assignment in if conditional.
|
|
if ($line=~/\bif\s*\(.*[^<>!=]=[^=].*\)/) {
|
|
#next if ($line=~/\".*\Q$op\E.*\"/ or $line=~/\'\Q$op\E\'/);
|
|
print "do not use assignment in if condition\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# Check for }<nl>else {, these must be at the same
|
|
# indent level to be relevant to each other.
|
|
if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
|
|
$previndent == $indent) {
|
|
print "else should follow close brace\n";
|
|
print "$hereprev";
|
|
$clean = 0;
|
|
}
|
|
|
|
#studly caps, commented out until figure out how to distinguish between use of existing and adding new
|
|
# if (($line=~/[\w_][a-z\d]+[A-Z]/) and !($line=~/print/)) {
|
|
# print "No studly caps, use _\n";
|
|
# print "$herecurr";
|
|
# $clean = 0;
|
|
# }
|
|
|
|
#no spaces allowed after \ in define
|
|
if ($line=~/\#define.*\\\s$/) {
|
|
print("Whitepspace after \\ makes next lines useless\n");
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
#warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
|
|
if ($tree && $rawline =~ m{^.\#\s*include\s*\<asm\/(.*)\.h\>}) {
|
|
my $checkfile = "include/linux/$1.h";
|
|
if (-f $checkfile) {
|
|
print "Use #include <linux/$1.h> instead of <asm/$1.h>\n";
|
|
print $herecurr;
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# if/while/etc brace do not go on next line, unless defining a do while loop,
|
|
# or if that brace on the next line is for something else
|
|
if ($prevline=~/\b(if|while|for|switch)\s*\(/) {
|
|
my @opened = $prevline=~/\(/g;
|
|
my @closed = $prevline=~/\)/g;
|
|
my $nr_line = $linenr;
|
|
my $remaining = $realcnt - 1;
|
|
my $next_line = $line;
|
|
my $extra_lines = 0;
|
|
my $display_segment = $prevline;
|
|
|
|
while ($remaining > 0 && scalar @opened > scalar @closed) {
|
|
$prevline .= $next_line;
|
|
$display_segment .= "\n" . $next_line;
|
|
$next_line = $lines[$nr_line];
|
|
$nr_line++;
|
|
$remaining--;
|
|
|
|
@opened = $prevline=~/\(/g;
|
|
@closed = $prevline=~/\)/g;
|
|
}
|
|
|
|
if (($prevline=~/\b(if|while|for|switch)\s*\(.*\)\s*$/) and ($next_line=~/{/) and
|
|
!($next_line=~/\b(if|while|for|switch)/) and !($next_line=~/\#define.*do.*while/)) {
|
|
print "That { should be on the previous line\n";
|
|
print "$here\n$display_segment\n$next_line\n\n";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# multi-statement macros should be enclosed in a do while loop, grab the
|
|
# first statement and ensure its the whole macro if its not enclosed
|
|
# in a known goot container
|
|
if (($prevline=~/\#define.*\\/) and
|
|
!($prevline=~/do\s+{/) and !($prevline=~/\(\{/) and
|
|
!($line=~/do.*{/) and !($line=~/\(\{/) and
|
|
!($line=~/^.\s*$Declare\s/)) {
|
|
# Grab the first statement, if that is the entire macro
|
|
# its ok. This may start either on the #define line
|
|
# or the one below.
|
|
my $ctx1 = join('', ctx_statement($linenr - 1, $realcnt + 1));
|
|
my $ctx2 = join('', ctx_statement($linenr, $realcnt));
|
|
|
|
if ($ctx1 =~ /\\$/ && $ctx2 =~ /\\$/) {
|
|
print "Macros with multiple statements should be enclosed in a do - while loop\n";
|
|
print "$hereprev";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# don't include deprecated include files (uses RAW line)
|
|
for my $inc (@dep_includes) {
|
|
if ($rawline =~ m@\#\s*include\s*\<$inc>@) {
|
|
print "Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# don't use deprecated functions
|
|
for my $func (@dep_functions) {
|
|
if ($line =~ /\b$func\b/) {
|
|
print "Don't use $func(): see Documentation/feature-removal-schedule.txt\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
# no volatiles please
|
|
if ($line =~ /\bvolatile\b/ && $line !~ /\basm\s+volatile\b/) {
|
|
print "Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# warn about #if 0
|
|
if ($line =~ /^.#\s*if\s+0\b/) {
|
|
print "#if 0 -- if this code redundant remove it\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
# warn about #ifdefs in C files
|
|
# if ($line =~ /^.#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
|
|
# print "#ifdef in C files should be avoided\n";
|
|
# print "$herecurr";
|
|
# $clean = 0;
|
|
# }
|
|
|
|
# check for spinlock_t definitions without a comment.
|
|
if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/) {
|
|
my $which = $1;
|
|
if (!ctx_has_comment($first_line, $linenr)) {
|
|
print "$1 definition without comment\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
# check for memory barriers without a comment.
|
|
if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
|
|
if (!ctx_has_comment($first_line, $linenr)) {
|
|
print "memory barrier without comment\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
# check of hardware specific defines
|
|
if ($line =~ m@^.#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@) {
|
|
print "architecture specific defines should be avoided\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
|
|
if ($line =~ /$Type\s+(?:inline|__always_inline)\b/ ||
|
|
$line =~ /\b(?:inline|always_inline)\s+$Storage/) {
|
|
print "inline keyword should sit between storage class and type\n";
|
|
print "$herecurr";
|
|
$clean = 0;
|
|
}
|
|
}
|
|
|
|
if ($chk_patch && !$is_patch) {
|
|
$clean = 0;
|
|
print "Does not appear to be a unified-diff format patch\n";
|
|
}
|
|
if ($is_patch && $chk_signoff && $signoff == 0) {
|
|
$clean = 0;
|
|
print "Missing Signed-off-by: line(s)\n";
|
|
}
|
|
|
|
if ($clean == 1 && $quiet == 0) {
|
|
print "Your patch has no obvious style problems and is ready for submission.\n"
|
|
}
|
|
if ($clean == 0 && $quiet == 0) {
|
|
print "Your patch has style problems, please review. If any of these errors\n";
|
|
print "are false positives report them to the maintainer, see\n";
|
|
print "CHECKPATCH in MAINTAINERS.\n";
|
|
}
|
|
return $clean;
|
|
}
|