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773647a09a
This version brings proper quote tracking across lines, and brings the
handling of comments into the same mechanism ensuring nesting is correctly
handled. It brings the usual flurry of fixes for false positives. It also
brings a number of new checks. The most contentious change will likely be
the checks for NR_CPUS as this throws some new warnings in kernel/sched.c.
Of note:
- all new quote tracking across lines
- all new comment tracking
- new more direct, less ambigious wording for some warnings
- recommends mutexes and completions over semaphores
- recommends strict_strto* over simple_strto*
- report on direct use of NR_CPUS
Andy Whitcroft (22):
Version: 0.16
string quote tracking should cross line boundaries
check spacing round -> correctly across newlines
checks for linux/ against asm/ include files should be warnings
standardise on 'required' and 'prohibited'
take the first end of condition when parsing statements
values: cope with unbalanced brackets
preprocessor #elif is not a function
preprocessor #if should not trigger trailing statement checks
test: allow us to limit output to a single error
recommend real mutexes over semaphores
asm checks should mirror those for __asm__
warn on semaphores being used in place of completions
trailing ; on control structure should ignore do {} while ();
recommend strict_strtoX over simple_strtoX
redo comment handling as a quote type
use of NR_CPUS is normally wrong
consistant spacing should only be about spaces
if brace check suppression should only apply to the top-levels
use tr/// to align spacing for operators
move to using four parameter form of substr
check and report modifications to include/asm
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2027 lines
53 KiB
Perl
Executable File
2027 lines
53 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 = '0.16';
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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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my $tst_only;
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my $emacs = 0;
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my $terse = 0;
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my $file = 0;
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my $check = 0;
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my $summary = 1;
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my $mailback = 0;
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my $summary_file = 0;
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my $root;
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my %debug;
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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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'emacs!' => \$emacs,
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'terse!' => \$terse,
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'file!' => \$file,
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'subjective!' => \$check,
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'strict!' => \$check,
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'root=s' => \$root,
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'summary!' => \$summary,
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'mailback!' => \$mailback,
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'summary-file!' => \$summary_file,
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'debug=s' => \%debug,
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'test-type!' => \$tst_type,
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'test-only=s' => \$tst_only,
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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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print " --terse => one line per report\n";
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print " --emacs => emacs compile window format\n";
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print " --file => check a source file\n";
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print " --strict => enable more subjective tests\n";
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print " --root => path to the kernel tree root\n";
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print " --no-summary => suppress the per-file summary\n";
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print " --summary-file => include the filename in summary\n";
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exit(1);
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}
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my $dbg_values = 0;
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my $dbg_possible = 0;
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for my $key (keys %debug) {
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eval "\${dbg_$key} = '$debug{$key}';"
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}
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if ($terse) {
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$emacs = 1;
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$quiet++;
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}
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if ($tree) {
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if (defined $root) {
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if (!top_of_kernel_tree($root)) {
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die "$P: $root: --root does not point at a valid tree\n";
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}
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} else {
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if (top_of_kernel_tree('.')) {
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$root = '.';
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} elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
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top_of_kernel_tree($1)) {
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$root = $1;
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}
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}
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if (!defined $root) {
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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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}
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my $emitted_corrupt = 0;
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our $Ident = qr{[A-Za-z_][A-Za-z\d_]*};
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our $Storage = qr{extern|static|asmlinkage};
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our $Sparse = qr{
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__user|
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__kernel|
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__force|
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__iomem|
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__must_check|
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__init_refok|
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__kprobes
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}x;
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our $Attribute = qr{
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const|
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__read_mostly|
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__kprobes|
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__(?:mem|cpu|dev|)(?:initdata|init)
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}x;
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our $Inline = qr{inline|__always_inline|noinline};
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our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
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our $Lval = qr{$Ident(?:$Member)*};
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our $Constant = qr{(?:[0-9]+|0x[0-9a-fA-F]+)[UL]*};
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our $Assignment = qr{(?:\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=)};
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our $Operators = qr{
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<=|>=|==|!=|
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=>|->|<<|>>|<|>|!|~|
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&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%
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}x;
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our $NonptrType;
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our $Type;
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our $Declare;
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our @typeList = (
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qr{void},
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qr{char},
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qr{short},
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qr{int},
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qr{long},
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qr{unsigned},
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qr{float},
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qr{double},
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qr{bool},
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qr{long\s+int},
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qr{long\s+long},
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qr{long\s+long\s+int},
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qr{(?:__)?(?:u|s|be|le)(?:8|16|32|64)},
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qr{struct\s+$Ident},
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qr{union\s+$Ident},
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qr{enum\s+$Ident},
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qr{${Ident}_t},
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qr{${Ident}_handler},
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qr{${Ident}_handler_fn},
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);
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sub build_types {
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my $all = "(?: \n" . join("|\n ", @typeList) . "\n)";
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$NonptrType = qr{
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\b
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(?:const\s+)?
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(?:unsigned\s+)?
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(?:
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$all|
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(?:typeof|__typeof__)\s*\(\s*\**\s*$Ident\s*\)
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)
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(?:\s+$Sparse|\s+const)*
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\b
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}x;
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$Type = qr{
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\b$NonptrType\b
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(?:\s*\*+\s*const|\s*\*+|(?:\s*\[\s*\])+)?
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(?:\s+$Inline|\s+$Sparse|\s+$Attribute)*
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}x;
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$Declare = qr{(?:$Storage\s+)?$Type};
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}
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build_types();
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$chk_signoff = 0 if ($file);
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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 "$root/$removal") {
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open(REMOVE, "<$root/$removal") ||
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die "$P: $removal: open failed - $!\n";
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while (<REMOVE>) {
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if (/^Check:\s+(.*\S)/) {
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for my $entry (split(/[, ]+/, $1)) {
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if ($entry =~ m@include/(.*)@) {
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push(@dep_includes, $1);
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} elsif ($entry !~ m@/@) {
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push(@dep_functions, $entry);
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}
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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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my @lines = ();
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my $vname;
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for my $filename (@ARGV) {
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if ($file) {
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open(FILE, "diff -u /dev/null $filename|") ||
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die "$P: $filename: diff failed - $!\n";
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} else {
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open(FILE, "<$filename") ||
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die "$P: $filename: open failed - $!\n";
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}
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if ($filename eq '-') {
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$vname = 'Your patch';
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} else {
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$vname = $filename;
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}
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while (<FILE>) {
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chomp;
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push(@rawlines, $_);
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}
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close(FILE);
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if (!process($filename)) {
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$exit = 1;
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}
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@rawlines = ();
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@lines = ();
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}
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exit($exit);
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sub top_of_kernel_tree {
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my ($root) = @_;
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my @tree_check = (
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"COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
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"README", "Documentation", "arch", "include", "drivers",
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"fs", "init", "ipc", "kernel", "lib", "scripts",
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);
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foreach my $check (@tree_check) {
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if (! -e $root . '/' . $check) {
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return 0;
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}
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}
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return 1;
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}
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sub expand_tabs {
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my ($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 copy_spacing {
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(my $res = shift) =~ tr/\t/ /c;
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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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my $sanitise_quote = '';
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sub sanitise_line_reset {
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my ($in_comment) = @_;
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if ($in_comment) {
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$sanitise_quote = '*/';
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} else {
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$sanitise_quote = '';
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}
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}
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sub sanitise_line {
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my ($line) = @_;
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my $res = '';
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my $l = '';
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my $qlen = 0;
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my $off = 0;
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my $c;
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# Always copy over the diff marker.
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$res = substr($line, 0, 1);
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for ($off = 1; $off < length($line); $off++) {
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$c = substr($line, $off, 1);
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# Comments we are wacking completly including the begin
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# and end, all to $;.
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if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
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$sanitise_quote = '*/';
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substr($res, $off, 2, "$;$;");
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$off++;
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next;
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}
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if (substr($line, $off, 2) eq $sanitise_quote) {
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$sanitise_quote = '';
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substr($res, $off, 2, "$;$;");
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$off++;
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next;
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}
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# A \ in a string means ignore the next character.
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if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
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$c eq "\\") {
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substr($res, $off, 2, 'XX');
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$off++;
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next;
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}
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# Regular quotes.
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if ($c eq "'" || $c eq '"') {
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if ($sanitise_quote eq '') {
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$sanitise_quote = $c;
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substr($res, $off, 1, $c);
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next;
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} elsif ($sanitise_quote eq $c) {
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$sanitise_quote = '';
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}
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}
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#print "SQ:$sanitise_quote\n";
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if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
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substr($res, $off, 1, $;);
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} elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
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substr($res, $off, 1, 'X');
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} else {
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substr($res, $off, 1, $c);
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}
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}
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# The pathname on a #include may be surrounded by '<' and '>'.
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if ($res =~ /^.#\s*include\s+\<(.*)\>/) {
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my $clean = 'X' x length($1);
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$res =~ s@\<.*\>@<$clean>@;
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# The whole of a #error is a string.
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} elsif ($res =~ /^.#\s*(?:error|warning)\s+(.*)\b/) {
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my $clean = 'X' x length($1);
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$res =~ s@(#\s*(?:error|warning)\s+).*@$1$clean@;
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}
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return $res;
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}
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sub ctx_statement_block {
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my ($linenr, $remain, $off) = @_;
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my $line = $linenr - 1;
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my $blk = '';
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my $soff = $off;
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my $coff = $off - 1;
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my $coff_set = 0;
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my $loff = 0;
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my $type = '';
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my $level = 0;
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my $p;
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my $c;
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my $len = 0;
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my $remainder;
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while (1) {
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#warn "CSB: blk<$blk> remain<$remain>\n";
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# If we are about to drop off the end, pull in more
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# context.
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if ($off >= $len) {
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for (; $remain > 0; $line++) {
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next if ($lines[$line] =~ /^-/);
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$remain--;
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$loff = $len;
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$blk .= $lines[$line] . "\n";
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$len = length($blk);
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$line++;
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last;
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}
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# Bail if there is no further context.
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#warn "CSB: blk<$blk> off<$off> len<$len>\n";
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if ($off >= $len) {
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last;
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}
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}
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$p = $c;
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$c = substr($blk, $off, 1);
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$remainder = substr($blk, $off);
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#warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
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# Statement ends at the ';' or a close '}' at the
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# outermost level.
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if ($level == 0 && $c eq ';') {
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last;
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}
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# An else is really a conditional as long as its not else if
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if ($level == 0 && $coff_set == 0 &&
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(!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
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$remainder =~ /^(else)(?:\s|{)/ &&
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$remainder !~ /^else\s+if\b/) {
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$coff = $off + length($1) - 1;
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$coff_set = 1;
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#warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
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#warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
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}
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if (($type eq '' || $type eq '(') && $c eq '(') {
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$level++;
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$type = '(';
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}
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if ($type eq '(' && $c eq ')') {
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$level--;
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$type = ($level != 0)? '(' : '';
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if ($level == 0 && $coff < $soff) {
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$coff = $off;
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$coff_set = 1;
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#warn "CSB: mark coff<$coff>\n";
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}
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}
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if (($type eq '' || $type eq '{') && $c eq '{') {
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$level++;
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$type = '{';
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}
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if ($type eq '{' && $c eq '}') {
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$level--;
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$type = ($level != 0)? '{' : '';
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if ($level == 0) {
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last;
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}
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}
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$off++;
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}
|
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if ($off == $len) {
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$line++;
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$remain--;
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}
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my $statement = substr($blk, $soff, $off - $soff + 1);
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my $condition = substr($blk, $soff, $coff - $soff + 1);
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#warn "STATEMENT<$statement>\n";
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#warn "CONDITION<$condition>\n";
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#print "coff<$coff> soff<$off> loff<$loff>\n";
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return ($statement, $condition,
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$line, $remain + 1, $off - $loff + 1, $level);
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}
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sub statement_lines {
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my ($stmt) = @_;
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# Strip the diff line prefixes and rip blank lines at start and end.
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$stmt =~ s/(^|\n)./$1/g;
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$stmt =~ s/^\s*//;
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$stmt =~ s/\s*$//;
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my @stmt_lines = ($stmt =~ /\n/g);
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return $#stmt_lines + 2;
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}
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sub statement_rawlines {
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my ($stmt) = @_;
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my @stmt_lines = ($stmt =~ /\n/g);
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return $#stmt_lines + 2;
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}
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sub statement_block_size {
|
|
my ($stmt) = @_;
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|
|
$stmt =~ s/(^|\n)./$1/g;
|
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$stmt =~ s/^\s*{//;
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$stmt =~ s/}\s*$//;
|
|
$stmt =~ s/^\s*//;
|
|
$stmt =~ s/\s*$//;
|
|
|
|
my @stmt_lines = ($stmt =~ /\n/g);
|
|
my @stmt_statements = ($stmt =~ /;/g);
|
|
|
|
my $stmt_lines = $#stmt_lines + 2;
|
|
my $stmt_statements = $#stmt_statements + 1;
|
|
|
|
if ($stmt_lines > $stmt_statements) {
|
|
return $stmt_lines;
|
|
} else {
|
|
return $stmt_statements;
|
|
}
|
|
}
|
|
|
|
sub ctx_statement_full {
|
|
my ($linenr, $remain, $off) = @_;
|
|
my ($statement, $condition, $level);
|
|
|
|
my (@chunks);
|
|
|
|
# Grab the first conditional/block pair.
|
|
($statement, $condition, $linenr, $remain, $off, $level) =
|
|
ctx_statement_block($linenr, $remain, $off);
|
|
#print "F: c<$condition> s<$statement> remain<$remain>\n";
|
|
push(@chunks, [ $condition, $statement ]);
|
|
if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
|
|
return ($level, $linenr, @chunks);
|
|
}
|
|
|
|
# Pull in the following conditional/block pairs and see if they
|
|
# could continue the statement.
|
|
for (;;) {
|
|
($statement, $condition, $linenr, $remain, $off, $level) =
|
|
ctx_statement_block($linenr, $remain, $off);
|
|
#print "C: c<$condition> s<$statement> remain<$remain>\n";
|
|
last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
|
|
#print "C: push\n";
|
|
push(@chunks, [ $condition, $statement ]);
|
|
}
|
|
|
|
return ($level, $linenr, @chunks);
|
|
}
|
|
|
|
sub ctx_block_get {
|
|
my ($linenr, $remain, $outer, $open, $close, $off) = @_;
|
|
my $line;
|
|
my $start = $linenr - 1;
|
|
my $blk = '';
|
|
my @o;
|
|
my @c;
|
|
my @res = ();
|
|
|
|
my $level = 0;
|
|
for ($line = $start; $remain > 0; $line++) {
|
|
next if ($rawlines[$line] =~ /^-/);
|
|
$remain--;
|
|
|
|
$blk .= $rawlines[$line];
|
|
foreach my $c (split(//, $rawlines[$line])) {
|
|
##print "C<$c>L<$level><$open$close>O<$off>\n";
|
|
if ($off > 0) {
|
|
$off--;
|
|
next;
|
|
}
|
|
|
|
if ($c eq $close && $level > 0) {
|
|
$level--;
|
|
last if ($level == 0);
|
|
} elsif ($c eq $open) {
|
|
$level++;
|
|
}
|
|
}
|
|
|
|
if (!$outer || $level <= 1) {
|
|
push(@res, $rawlines[$line]);
|
|
}
|
|
|
|
last if ($level == 0);
|
|
}
|
|
|
|
return ($level, @res);
|
|
}
|
|
sub ctx_block_outer {
|
|
my ($linenr, $remain) = @_;
|
|
|
|
my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
|
|
return @r;
|
|
}
|
|
sub ctx_block {
|
|
my ($linenr, $remain) = @_;
|
|
|
|
my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
|
|
return @r;
|
|
}
|
|
sub ctx_statement {
|
|
my ($linenr, $remain, $off) = @_;
|
|
|
|
my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
|
|
return @r;
|
|
}
|
|
sub ctx_block_level {
|
|
my ($linenr, $remain) = @_;
|
|
|
|
return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
|
|
}
|
|
sub ctx_statement_level {
|
|
my ($linenr, $remain, $off) = @_;
|
|
|
|
return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
|
|
}
|
|
|
|
sub ctx_locate_comment {
|
|
my ($first_line, $end_line) = @_;
|
|
|
|
# Catch a comment on the end of the line itself.
|
|
my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*$@);
|
|
return $current_comment if (defined $current_comment);
|
|
|
|
# Look through the context and try and figure out if there is a
|
|
# comment.
|
|
my $in_comment = 0;
|
|
$current_comment = '';
|
|
for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
|
|
my $line = $rawlines[$linenr - 1];
|
|
#warn " $line\n";
|
|
if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
|
|
$in_comment = 1;
|
|
}
|
|
if ($line =~ m@/\*@) {
|
|
$in_comment = 1;
|
|
}
|
|
if (!$in_comment && $current_comment ne '') {
|
|
$current_comment = '';
|
|
}
|
|
$current_comment .= $line . "\n" if ($in_comment);
|
|
if ($line =~ m@\*/@) {
|
|
$in_comment = 0;
|
|
}
|
|
}
|
|
|
|
chomp($current_comment);
|
|
return($current_comment);
|
|
}
|
|
sub ctx_has_comment {
|
|
my ($first_line, $end_line) = @_;
|
|
my $cmt = ctx_locate_comment($first_line, $end_line);
|
|
|
|
##print "LINE: $rawlines[$end_line - 1 ]\n";
|
|
##print "CMMT: $cmt\n";
|
|
|
|
return ($cmt ne '');
|
|
}
|
|
|
|
sub cat_vet {
|
|
my ($vet) = @_;
|
|
my ($res, $coded);
|
|
|
|
$res = '';
|
|
while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
|
|
$res .= $1;
|
|
if ($2 ne '') {
|
|
$coded = sprintf("^%c", unpack('C', $2) + 64);
|
|
$res .= $coded;
|
|
}
|
|
}
|
|
$res =~ s/$/\$/;
|
|
|
|
return $res;
|
|
}
|
|
|
|
my $av_preprocessor = 0;
|
|
my $av_pending;
|
|
my @av_paren_type;
|
|
|
|
sub annotate_reset {
|
|
$av_preprocessor = 0;
|
|
$av_pending = '_';
|
|
@av_paren_type = ('E');
|
|
}
|
|
|
|
sub annotate_values {
|
|
my ($stream, $type) = @_;
|
|
|
|
my $res;
|
|
my $cur = $stream;
|
|
|
|
print "$stream\n" if ($dbg_values > 1);
|
|
|
|
while (length($cur)) {
|
|
@av_paren_type = ('E') if ($#av_paren_type < 0);
|
|
print " <" . join('', @av_paren_type) .
|
|
"> <$type> " if ($dbg_values > 1);
|
|
if ($cur =~ /^(\s+)/o) {
|
|
print "WS($1)\n" if ($dbg_values > 1);
|
|
if ($1 =~ /\n/ && $av_preprocessor) {
|
|
$type = pop(@av_paren_type);
|
|
$av_preprocessor = 0;
|
|
}
|
|
|
|
} elsif ($cur =~ /^($Type)/) {
|
|
print "DECLARE($1)\n" if ($dbg_values > 1);
|
|
$type = 'T';
|
|
|
|
} elsif ($cur =~ /^(#\s*define\s*$Ident)(\(?)/o) {
|
|
print "DEFINE($1)\n" if ($dbg_values > 1);
|
|
$av_preprocessor = 1;
|
|
$av_pending = 'N';
|
|
|
|
} elsif ($cur =~ /^(#\s*(?:ifdef|ifndef|if))/o) {
|
|
print "PRE_START($1)\n" if ($dbg_values > 1);
|
|
$av_preprocessor = 1;
|
|
|
|
push(@av_paren_type, $type);
|
|
push(@av_paren_type, $type);
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~ /^(#\s*(?:else|elif))/o) {
|
|
print "PRE_RESTART($1)\n" if ($dbg_values > 1);
|
|
$av_preprocessor = 1;
|
|
|
|
push(@av_paren_type, $av_paren_type[$#av_paren_type]);
|
|
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~ /^(#\s*(?:endif))/o) {
|
|
print "PRE_END($1)\n" if ($dbg_values > 1);
|
|
|
|
$av_preprocessor = 1;
|
|
|
|
# Assume all arms of the conditional end as this
|
|
# one does, and continue as if the #endif was not here.
|
|
pop(@av_paren_type);
|
|
push(@av_paren_type, $type);
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~ /^(\\\n)/o) {
|
|
print "PRECONT($1)\n" if ($dbg_values > 1);
|
|
|
|
} elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
|
|
print "SIZEOF($1)\n" if ($dbg_values > 1);
|
|
if (defined $2) {
|
|
$av_pending = 'V';
|
|
}
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~ /^(if|while|typeof|__typeof__|for)\b/o) {
|
|
print "COND($1)\n" if ($dbg_values > 1);
|
|
$av_pending = 'N';
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~/^(return|case|else)/o) {
|
|
print "KEYWORD($1)\n" if ($dbg_values > 1);
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~ /^(\()/o) {
|
|
print "PAREN('$1')\n" if ($dbg_values > 1);
|
|
push(@av_paren_type, $av_pending);
|
|
$av_pending = '_';
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~ /^(\))/o) {
|
|
my $new_type = pop(@av_paren_type);
|
|
if ($new_type ne '_') {
|
|
$type = $new_type;
|
|
print "PAREN('$1') -> $type\n"
|
|
if ($dbg_values > 1);
|
|
} else {
|
|
print "PAREN('$1')\n" if ($dbg_values > 1);
|
|
}
|
|
|
|
} elsif ($cur =~ /^($Ident)\(/o) {
|
|
print "FUNC($1)\n" if ($dbg_values > 1);
|
|
$av_pending = 'V';
|
|
|
|
} elsif ($cur =~ /^($Ident|$Constant)/o) {
|
|
print "IDENT($1)\n" if ($dbg_values > 1);
|
|
$type = 'V';
|
|
|
|
} elsif ($cur =~ /^($Assignment)/o) {
|
|
print "ASSIGN($1)\n" if ($dbg_values > 1);
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~/^(;|{|})/) {
|
|
print "END($1)\n" if ($dbg_values > 1);
|
|
$type = 'E';
|
|
|
|
} elsif ($cur =~ /^(;|\?|:|\[)/o) {
|
|
print "CLOSE($1)\n" if ($dbg_values > 1);
|
|
$type = 'N';
|
|
|
|
} elsif ($cur =~ /^($Operators)/o) {
|
|
print "OP($1)\n" if ($dbg_values > 1);
|
|
if ($1 ne '++' && $1 ne '--') {
|
|
$type = 'N';
|
|
}
|
|
|
|
} elsif ($cur =~ /(^.)/o) {
|
|
print "C($1)\n" if ($dbg_values > 1);
|
|
}
|
|
if (defined $1) {
|
|
$cur = substr($cur, length($1));
|
|
$res .= $type x length($1);
|
|
}
|
|
}
|
|
|
|
return $res;
|
|
}
|
|
|
|
sub possible {
|
|
my ($possible, $line) = @_;
|
|
|
|
#print "CHECK<$possible>\n";
|
|
if ($possible !~ /^(?:$Storage|$Type|DEFINE_\S+)$/ &&
|
|
$possible ne 'goto' && $possible ne 'return' &&
|
|
$possible ne 'struct' && $possible ne 'enum' &&
|
|
$possible ne 'case' && $possible ne 'else' &&
|
|
$possible ne 'typedef') {
|
|
warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
|
|
push(@typeList, $possible);
|
|
build_types();
|
|
}
|
|
}
|
|
|
|
my $prefix = '';
|
|
|
|
sub report {
|
|
if (defined $tst_only && $_[0] !~ /\Q$tst_only\E/) {
|
|
return 0;
|
|
}
|
|
my $line = $prefix . $_[0];
|
|
|
|
$line = (split('\n', $line))[0] . "\n" if ($terse);
|
|
|
|
push(our @report, $line);
|
|
|
|
return 1;
|
|
}
|
|
sub report_dump {
|
|
our @report;
|
|
}
|
|
sub ERROR {
|
|
if (report("ERROR: $_[0]\n")) {
|
|
our $clean = 0;
|
|
our $cnt_error++;
|
|
}
|
|
}
|
|
sub WARN {
|
|
if (report("WARNING: $_[0]\n")) {
|
|
our $clean = 0;
|
|
our $cnt_warn++;
|
|
}
|
|
}
|
|
sub CHK {
|
|
if ($check && report("CHECK: $_[0]\n")) {
|
|
our $clean = 0;
|
|
our $cnt_chk++;
|
|
}
|
|
}
|
|
|
|
sub process {
|
|
my $filename = shift;
|
|
|
|
my $linenr=0;
|
|
my $prevline="";
|
|
my $prevrawline="";
|
|
my $stashline="";
|
|
my $stashrawline="";
|
|
|
|
my $length;
|
|
my $indent;
|
|
my $previndent=0;
|
|
my $stashindent=0;
|
|
|
|
our $clean = 1;
|
|
my $signoff = 0;
|
|
my $is_patch = 0;
|
|
|
|
our @report = ();
|
|
our $cnt_lines = 0;
|
|
our $cnt_error = 0;
|
|
our $cnt_warn = 0;
|
|
our $cnt_chk = 0;
|
|
|
|
# Trace the real file/line as we go.
|
|
my $realfile = '';
|
|
my $realline = 0;
|
|
my $realcnt = 0;
|
|
my $here = '';
|
|
my $in_comment = 0;
|
|
my $comment_edge = 0;
|
|
my $first_line = 0;
|
|
|
|
my $prev_values = 'E';
|
|
|
|
# suppression flags
|
|
my %suppress_ifbraces;
|
|
|
|
# Pre-scan the patch sanitizing the lines.
|
|
# Pre-scan the patch looking for any __setup documentation.
|
|
#
|
|
my @setup_docs = ();
|
|
my $setup_docs = 0;
|
|
|
|
sanitise_line_reset();
|
|
my $line;
|
|
foreach my $rawline (@rawlines) {
|
|
$linenr++;
|
|
$line = $rawline;
|
|
|
|
if ($rawline=~/^\+\+\+\s+(\S+)/) {
|
|
$setup_docs = 0;
|
|
if ($1 =~ m@Documentation/kernel-parameters.txt$@) {
|
|
$setup_docs = 1;
|
|
}
|
|
#next;
|
|
}
|
|
if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
|
|
$realline=$1-1;
|
|
if (defined $2) {
|
|
$realcnt=$3+1;
|
|
} else {
|
|
$realcnt=1+1;
|
|
}
|
|
|
|
# Guestimate if this is a continuing comment. Run
|
|
# the context looking for a comment "edge". If this
|
|
# edge is a close comment then we must be in a comment
|
|
# at context start.
|
|
my $edge;
|
|
for (my $ln = $linenr; $ln < ($linenr + $realcnt); $ln++) {
|
|
next if ($line =~ /^-/);
|
|
($edge) = ($rawlines[$ln - 1] =~ m@(/\*|\*/)@);
|
|
last if (defined $edge);
|
|
}
|
|
if (defined $edge && $edge eq '*/') {
|
|
$in_comment = 1;
|
|
}
|
|
|
|
# Guestimate if this is a continuing comment. If this
|
|
# is the start of a diff block and this line starts
|
|
# ' *' then it is very likely a comment.
|
|
if (!defined $edge &&
|
|
$rawlines[$linenr] =~ m@^.\s* \*(?:\s|$)@)
|
|
{
|
|
$in_comment = 1;
|
|
}
|
|
|
|
##print "COMMENT:$in_comment edge<$edge> $rawline\n";
|
|
sanitise_line_reset($in_comment);
|
|
|
|
} elsif ($realcnt) {
|
|
# Standardise the strings and chars within the input to
|
|
# simplify matching.
|
|
$line = sanitise_line($rawline);
|
|
}
|
|
push(@lines, $line);
|
|
|
|
if ($realcnt > 1) {
|
|
$realcnt-- if ($line =~ /^(?:\+| |$)/);
|
|
} else {
|
|
$realcnt = 0;
|
|
}
|
|
|
|
#print "==>$rawline\n";
|
|
#print "-->$line\n";
|
|
|
|
if ($setup_docs && $line =~ /^\+/) {
|
|
push(@setup_docs, $line);
|
|
}
|
|
}
|
|
|
|
$prefix = '';
|
|
|
|
$realcnt = 0;
|
|
$linenr = 0;
|
|
foreach my $line (@lines) {
|
|
$linenr++;
|
|
|
|
my $rawline = $rawlines[$linenr - 1];
|
|
|
|
#extract the line range in the file after the patch is applied
|
|
if ($line=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
|
|
$is_patch = 1;
|
|
$first_line = $linenr + 1;
|
|
$realline=$1-1;
|
|
if (defined $2) {
|
|
$realcnt=$3+1;
|
|
} else {
|
|
$realcnt=1+1;
|
|
}
|
|
annotate_reset();
|
|
$prev_values = 'E';
|
|
|
|
%suppress_ifbraces = ();
|
|
next;
|
|
|
|
# track the line number as we move through the hunk, note that
|
|
# new versions of GNU diff omit the leading space on completely
|
|
# blank context lines so we need to count that too.
|
|
} elsif ($line =~ /^( |\+|$)/) {
|
|
$realline++;
|
|
$realcnt-- if ($realcnt != 0);
|
|
|
|
# Measure the line length and indent.
|
|
($length, $indent) = line_stats($rawline);
|
|
|
|
# Track the previous line.
|
|
($prevline, $stashline) = ($stashline, $line);
|
|
($previndent, $stashindent) = ($stashindent, $indent);
|
|
($prevrawline, $stashrawline) = ($stashrawline, $rawline);
|
|
|
|
#warn "line<$line>\n";
|
|
|
|
} elsif ($realcnt == 1) {
|
|
$realcnt--;
|
|
}
|
|
|
|
#make up the handle for any error we report on this line
|
|
$prefix = "$filename:$realline: " if ($emacs && $file);
|
|
$prefix = "$filename:$linenr: " if ($emacs && !$file);
|
|
|
|
$here = "#$linenr: " if (!$file);
|
|
$here = "#$realline: " if ($file);
|
|
|
|
# extract the filename as it passes
|
|
if ($line=~/^\+\+\+\s+(\S+)/) {
|
|
$realfile = $1;
|
|
$realfile =~ s@^[^/]*/@@;
|
|
|
|
if ($realfile =~ m@include/asm/@) {
|
|
ERROR("do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
|
|
}
|
|
next;
|
|
}
|
|
|
|
$here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
|
|
|
|
my $hereline = "$here\n$rawline\n";
|
|
my $herecurr = "$here\n$rawline\n";
|
|
my $hereprev = "$here\n$prevrawline\n$rawline\n";
|
|
|
|
$cnt_lines++ if ($realcnt != 0);
|
|
|
|
#check the patch for a signoff:
|
|
if ($line =~ /^\s*signed-off-by:/i) {
|
|
# This is a signoff, if ugly, so do not double report.
|
|
$signoff++;
|
|
if (!($line =~ /^\s*Signed-off-by:/)) {
|
|
WARN("Signed-off-by: is the preferred form\n" .
|
|
$herecurr);
|
|
}
|
|
if ($line =~ /^\s*signed-off-by:\S/i) {
|
|
WARN("space required after Signed-off-by:\n" .
|
|
$herecurr);
|
|
}
|
|
}
|
|
|
|
# Check for wrappage within a valid hunk of the file
|
|
if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
|
|
ERROR("patch seems to be corrupt (line wrapped?)\n" .
|
|
$herecurr) if (!$emitted_corrupt++);
|
|
}
|
|
|
|
# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
|
|
if (($realfile =~ /^$/ || $line =~ /^\+/) &&
|
|
!($rawline =~ m/^(
|
|
[\x09\x0A\x0D\x20-\x7E] # ASCII
|
|
| [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
|
|
| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
|
|
| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
|
|
| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
|
|
| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
|
|
| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
|
|
| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
|
|
)*$/x )) {
|
|
ERROR("Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $herecurr);
|
|
}
|
|
|
|
#ignore lines being removed
|
|
if ($line=~/^-/) {next;}
|
|
|
|
# check we are in a valid source file if not then ignore this hunk
|
|
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
|
|
|
|
#trailing whitespace
|
|
if ($line =~ /^\+.*\015/) {
|
|
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
|
|
ERROR("DOS line endings\n" . $herevet);
|
|
|
|
} elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
|
|
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
|
|
ERROR("trailing whitespace\n" . $herevet);
|
|
}
|
|
#80 column limit
|
|
if ($line =~ /^\+/ && !($prevrawline=~/\/\*\*/) && $length > 80) {
|
|
WARN("line over 80 characters\n" . $herecurr);
|
|
}
|
|
|
|
# check for adding lines without a newline.
|
|
if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
|
|
WARN("adding a line without newline at end of file\n" . $herecurr);
|
|
}
|
|
|
|
# check we are in a valid source file *.[hc] if not then ignore this hunk
|
|
next if ($realfile !~ /\.[hc]$/);
|
|
|
|
# at the beginning of a line any tabs must come first and anything
|
|
# more than 8 must use tabs.
|
|
if ($rawline =~ /^\+\s* \t\s*\S/ ||
|
|
$rawline =~ /^\+\s* \s*/) {
|
|
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
|
|
ERROR("use tabs not spaces\n" . $herevet);
|
|
}
|
|
|
|
# check for RCS/CVS revision markers
|
|
if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
|
|
WARN("CVS style keyword markers, these will _not_ be updated\n". $herecurr);
|
|
}
|
|
|
|
# Check for potential 'bare' types
|
|
if ($realcnt) {
|
|
my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
|
|
$s =~ s/\n./ /g;
|
|
$s =~ s/{.*$//;
|
|
|
|
# Ignore goto labels.
|
|
if ($s =~ /$Ident:\*$/) {
|
|
|
|
# Ignore functions being called
|
|
} elsif ($s =~ /^.\s*$Ident\s*\(/) {
|
|
|
|
# definitions in global scope can only start with types
|
|
} elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b/) {
|
|
possible($1, $s);
|
|
|
|
# declarations always start with types
|
|
} elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:const\s+)?($Ident)\b(:?\s+$Sparse)?\s*\**\s*$Ident\s*(?:;|=|,)/) {
|
|
possible($1, $s);
|
|
}
|
|
|
|
# any (foo ... *) is a pointer cast, and foo is a type
|
|
while ($s =~ /\(($Ident)(?:\s+$Sparse)*\s*\*+\s*\)/g) {
|
|
possible($1, $s);
|
|
}
|
|
|
|
# Check for any sort of function declaration.
|
|
# int foo(something bar, other baz);
|
|
# void (*store_gdt)(x86_descr_ptr *);
|
|
if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/) {
|
|
my ($name_len) = length($1);
|
|
|
|
my $ctx = $s;
|
|
substr($ctx, 0, $name_len + 1, '');
|
|
$ctx =~ s/\)[^\)]*$//;
|
|
|
|
for my $arg (split(/\s*,\s*/, $ctx)) {
|
|
if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/ || $arg =~ /^($Ident)$/) {
|
|
|
|
possible($1, $s);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
#
|
|
# Checks which may be anchored in the context.
|
|
#
|
|
|
|
# Check for switch () and associated case and default
|
|
# statements should be at the same indent.
|
|
if ($line=~/\bswitch\s*\(.*\)/) {
|
|
my $err = '';
|
|
my $sep = '';
|
|
my @ctx = ctx_block_outer($linenr, $realcnt);
|
|
shift(@ctx);
|
|
for my $ctx (@ctx) {
|
|
my ($clen, $cindent) = line_stats($ctx);
|
|
if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
|
|
$indent != $cindent) {
|
|
$err .= "$sep$ctx\n";
|
|
$sep = '';
|
|
} else {
|
|
$sep = "[...]\n";
|
|
}
|
|
}
|
|
if ($err ne '') {
|
|
ERROR("switch and case should be at the same indent\n$hereline$err");
|
|
}
|
|
}
|
|
|
|
# if/while/etc brace do not go on next line, unless defining a do while loop,
|
|
# or if that brace on the next line is for something else
|
|
if ($line =~ /(.*)\b((?:if|while|for|switch)\s*\(|do\b|else\b)/ && $line !~ /^.#/) {
|
|
my $pre_ctx = "$1$2";
|
|
|
|
my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
|
|
my $ctx_ln = $linenr + $#ctx + 1;
|
|
my $ctx_cnt = $realcnt - $#ctx - 1;
|
|
my $ctx = join("\n", @ctx);
|
|
|
|
##warn "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
|
|
|
|
# Skip over any removed lines in the context following statement.
|
|
while (defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^-/) {
|
|
$ctx_ln++;
|
|
}
|
|
##warn "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
|
|
|
|
if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln -1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
|
|
ERROR("that open brace { should be on the previous line\n" .
|
|
"$here\n$ctx\n$lines[$ctx_ln - 1]");
|
|
}
|
|
if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
|
|
$ctx =~ /\)\s*\;\s*$/ &&
|
|
defined $lines[$ctx_ln - 1])
|
|
{
|
|
my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
|
|
if ($nindent > $indent) {
|
|
WARN("trailing semicolon indicates no statements, indent implies otherwise\n" .
|
|
"$here\n$ctx\n$lines[$ctx_ln - 1]");
|
|
}
|
|
}
|
|
}
|
|
|
|
# Track the 'values' across context and added lines.
|
|
my $opline = $line; $opline =~ s/^./ /;
|
|
my $curr_values = annotate_values($opline . "\n", $prev_values);
|
|
$curr_values = $prev_values . $curr_values;
|
|
if ($dbg_values) {
|
|
my $outline = $opline; $outline =~ s/\t/ /g;
|
|
print "$linenr > .$outline\n";
|
|
print "$linenr > $curr_values\n";
|
|
}
|
|
$prev_values = substr($curr_values, -1);
|
|
|
|
#ignore lines not being added
|
|
if ($line=~/^[^\+]/) {next;}
|
|
|
|
# TEST: allow direct testing of the type matcher.
|
|
if ($tst_type && $line =~ /^.$Declare$/) {
|
|
ERROR("TEST: is type $Declare\n" . $herecurr);
|
|
next;
|
|
}
|
|
|
|
# check for initialisation to aggregates open brace on the next line
|
|
if ($prevline =~ /$Declare\s*$Ident\s*=\s*$/ &&
|
|
$line =~ /^.\s*{/) {
|
|
ERROR("that open brace { should be on the previous line\n" . $hereprev);
|
|
}
|
|
|
|
#
|
|
# Checks which are anchored on the added line.
|
|
#
|
|
|
|
# check for malformed paths in #include statements (uses RAW line)
|
|
if ($rawline =~ m{^.#\s*include\s+[<"](.*)[">]}) {
|
|
my $path = $1;
|
|
if ($path =~ m{//}) {
|
|
ERROR("malformed #include filename\n" .
|
|
$herecurr);
|
|
}
|
|
}
|
|
|
|
# no C99 // comments
|
|
if ($line =~ m{//}) {
|
|
ERROR("do not use C99 // comments\n" . $herecurr);
|
|
}
|
|
# Remove C99 comments.
|
|
$line =~ s@//.*@@;
|
|
$opline =~ s@//.*@@;
|
|
|
|
#EXPORT_SYMBOL should immediately follow its function closing }.
|
|
if (($line =~ /EXPORT_SYMBOL.*\((.*)\)/) ||
|
|
($line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
|
|
my $name = $1;
|
|
if (($prevline !~ /^}/) &&
|
|
($prevline !~ /^\+}/) &&
|
|
($prevline !~ /^ }/) &&
|
|
($prevline !~ /^.DECLARE_$Ident\(\Q$name\E\)/) &&
|
|
($prevline !~ /^.LIST_HEAD\(\Q$name\E\)/) &&
|
|
($prevline !~ /\b\Q$name\E(?:\s+$Attribute)?\s*(?:;|=|\[)/)) {
|
|
WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# check for external initialisers.
|
|
if ($line =~ /^.$Type\s*$Ident\s*=\s*(0|NULL);/) {
|
|
ERROR("do not initialise externals to 0 or NULL\n" .
|
|
$herecurr);
|
|
}
|
|
# check for static initialisers.
|
|
if ($line =~ /\s*static\s.*=\s*(0|NULL);/) {
|
|
ERROR("do not initialise statics to 0 or NULL\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# check for new typedefs, only function parameters and sparse annotations
|
|
# make sense.
|
|
if ($line =~ /\btypedef\s/ &&
|
|
$line !~ /\btypedef\s+$Type\s+\(\s*\*?$Ident\s*\)\s*\(/ &&
|
|
$line !~ /\b__bitwise(?:__|)\b/) {
|
|
WARN("do not add new typedefs\n" . $herecurr);
|
|
}
|
|
|
|
# * goes on variable not on type
|
|
if ($line =~ m{\($NonptrType(\*+)(?:\s+const)?\)}) {
|
|
ERROR("\"(foo$1)\" should be \"(foo $1)\"\n" .
|
|
$herecurr);
|
|
|
|
} elsif ($line =~ m{\($NonptrType\s+(\*+)(?!\s+const)\s+\)}) {
|
|
ERROR("\"(foo $1 )\" should be \"(foo $1)\"\n" .
|
|
$herecurr);
|
|
|
|
} elsif ($line =~ m{$NonptrType(\*+)(?:\s+(?:$Attribute|$Sparse))?\s+[A-Za-z\d_]+}) {
|
|
ERROR("\"foo$1 bar\" should be \"foo $1bar\"\n" .
|
|
$herecurr);
|
|
|
|
} elsif ($line =~ m{$NonptrType\s+(\*+)(?!\s+(?:$Attribute|$Sparse))\s+[A-Za-z\d_]+}) {
|
|
ERROR("\"foo $1 bar\" should be \"foo $1bar\"\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# # no BUG() or BUG_ON()
|
|
# if ($line =~ /\b(BUG|BUG_ON)\b/) {
|
|
# print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
|
|
# print "$herecurr";
|
|
# $clean = 0;
|
|
# }
|
|
|
|
if ($line =~ /\bLINUX_VERSION_CODE\b/) {
|
|
WARN("LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
|
|
}
|
|
|
|
# printk should use KERN_* levels. Note that follow on printk's on the
|
|
# same line do not need a level, so we use the current block context
|
|
# to try and find and validate the current printk. In summary the current
|
|
# printk includes all preceeding printk's which have no newline on the end.
|
|
# we assume the first bad printk is the one to report.
|
|
if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
|
|
my $ok = 0;
|
|
for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
|
|
#print "CHECK<$lines[$ln - 1]\n";
|
|
# we have a preceeding printk if it ends
|
|
# with "\n" ignore it, else it is to blame
|
|
if ($lines[$ln - 1] =~ m{\bprintk\(}) {
|
|
if ($rawlines[$ln - 1] !~ m{\\n"}) {
|
|
$ok = 1;
|
|
}
|
|
last;
|
|
}
|
|
}
|
|
if ($ok == 0) {
|
|
WARN("printk() should include KERN_ facility level\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# function brace can't be on same line, except for #defines of do while,
|
|
# or if closed on same line
|
|
if (($line=~/$Type\s*[A-Za-z\d_]+\(.*\).*\s{/) and
|
|
!($line=~/\#define.*do\s{/) and !($line=~/}/)) {
|
|
ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
|
|
}
|
|
|
|
# open braces for enum, union and struct go on the same line.
|
|
if ($line =~ /^.\s*{/ &&
|
|
$prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
|
|
ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
|
|
}
|
|
|
|
# check for spaces between functions and their parentheses.
|
|
while ($line =~ /($Ident)\s+\(/g) {
|
|
my $name = $1;
|
|
my $ctx_before = substr($line, 0, $-[1]);
|
|
my $ctx = "$ctx_before$name";
|
|
|
|
# Ignore those directives where spaces _are_ permitted.
|
|
if ($name =~ /^(?:
|
|
if|for|while|switch|return|case|
|
|
volatile|__volatile__|
|
|
__attribute__|format|__extension__|
|
|
asm|__asm__)$/x)
|
|
{
|
|
|
|
# cpp #define statements have non-optional spaces, ie
|
|
# if there is a space between the name and the open
|
|
# parenthesis it is simply not a parameter group.
|
|
} elsif ($ctx_before =~ /^.\#\s*define\s*$/) {
|
|
|
|
# cpp #elif statement condition may start with a (
|
|
} elsif ($ctx =~ /^.\#\s*elif\s*$/) {
|
|
|
|
# If this whole things ends with a type its most
|
|
# likely a typedef for a function.
|
|
} elsif ($ctx =~ /$Type$/) {
|
|
|
|
} else {
|
|
WARN("space prohibited between function name and open parenthesis '('\n" . $herecurr);
|
|
}
|
|
}
|
|
# Check operator spacing.
|
|
if (!($line=~/\#\s*include/)) {
|
|
my $ops = qr{
|
|
<<=|>>=|<=|>=|==|!=|
|
|
\+=|-=|\*=|\/=|%=|\^=|\|=|&=|
|
|
=>|->|<<|>>|<|>|=|!|~|
|
|
&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%
|
|
}x;
|
|
my @elements = split(/($ops|;)/, $opline);
|
|
my $off = 0;
|
|
|
|
my $blank = copy_spacing($opline);
|
|
|
|
for (my $n = 0; $n < $#elements; $n += 2) {
|
|
$off += length($elements[$n]);
|
|
|
|
# Pick up the preceeding and succeeding characters.
|
|
my $ca = substr($opline, 0, $off);
|
|
my $cc = '';
|
|
if (length($opline) >= ($off + length($elements[$n + 1]))) {
|
|
$cc = substr($opline, $off + length($elements[$n + 1]));
|
|
}
|
|
my $cb = "$ca$;$cc";
|
|
|
|
my $a = '';
|
|
$a = 'V' if ($elements[$n] ne '');
|
|
$a = 'W' if ($elements[$n] =~ /\s$/);
|
|
$a = 'C' if ($elements[$n] =~ /$;$/);
|
|
$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
|
|
$a = 'O' if ($elements[$n] eq '');
|
|
$a = 'E' if ($ca =~ /^\s*$/);
|
|
|
|
my $op = $elements[$n + 1];
|
|
|
|
my $c = '';
|
|
if (defined $elements[$n + 2]) {
|
|
$c = 'V' if ($elements[$n + 2] ne '');
|
|
$c = 'W' if ($elements[$n + 2] =~ /^\s/);
|
|
$c = 'C' if ($elements[$n + 2] =~ /^$;/);
|
|
$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
|
|
$c = 'O' if ($elements[$n + 2] eq '');
|
|
$c = 'E' if ($elements[$n + 2] =~ /\s*\\$/);
|
|
} else {
|
|
$c = 'E';
|
|
}
|
|
|
|
my $ctx = "${a}x${c}";
|
|
|
|
my $at = "(ctx:$ctx)";
|
|
|
|
my $ptr = substr($blank, 0, $off) . "^";
|
|
my $hereptr = "$hereline$ptr\n";
|
|
|
|
# Classify operators into binary, unary, or
|
|
# definitions (* only) where they have more
|
|
# than one mode.
|
|
my $op_type = substr($curr_values, $off + 1, 1);
|
|
my $op_left = substr($curr_values, $off, 1);
|
|
my $is_unary;
|
|
if ($op_type eq 'T') {
|
|
$is_unary = 2;
|
|
} elsif ($op_left eq 'V') {
|
|
$is_unary = 0;
|
|
} else {
|
|
$is_unary = 1;
|
|
}
|
|
#if ($op eq '-' || $op eq '&' || $op eq '*') {
|
|
# print "UNARY: <$op_left$op_type $is_unary $a:$op:$c> <$ca:$op:$cc> <$unary_ctx>\n";
|
|
#}
|
|
|
|
# Ignore operators passed as parameters.
|
|
if ($op_type ne 'V' &&
|
|
$ca =~ /\s$/ && $cc =~ /^\s*,/) {
|
|
|
|
# # Ignore comments
|
|
# } elsif ($op =~ /^$;+$/) {
|
|
|
|
# ; should have either the end of line or a space or \ after it
|
|
} elsif ($op eq ';') {
|
|
if ($ctx !~ /.x[WEBC]/ &&
|
|
$cc !~ /^\\/ && $cc !~ /^;/) {
|
|
ERROR("space required after that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# // is a comment
|
|
} elsif ($op eq '//') {
|
|
|
|
# -> should have no spaces
|
|
} elsif ($op eq '->') {
|
|
if ($ctx =~ /Wx.|.xW/) {
|
|
ERROR("spaces prohibited around that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# , must have a space on the right.
|
|
} elsif ($op eq ',') {
|
|
if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
|
|
ERROR("space required after that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# '*' as part of a type definition -- reported already.
|
|
} elsif ($op eq '*' && $is_unary == 2) {
|
|
#warn "'*' is part of type\n";
|
|
|
|
# unary operators should have a space before and
|
|
# none after. May be left adjacent to another
|
|
# unary operator, or a cast
|
|
} elsif ($op eq '!' || $op eq '~' ||
|
|
($is_unary && ($op eq '*' || $op eq '-' || $op eq '&'))) {
|
|
if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
|
|
ERROR("space required before that '$op' $at\n" . $hereptr);
|
|
}
|
|
if ($ctx =~ /.xW/) {
|
|
ERROR("space prohibited after that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
# unary ++ and unary -- are allowed no space on one side.
|
|
} elsif ($op eq '++' or $op eq '--') {
|
|
if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
|
|
ERROR("space required one side of that '$op' $at\n" . $hereptr);
|
|
}
|
|
if ($ctx =~ /Wx[BE]/ ||
|
|
($ctx =~ /Wx./ && $cc =~ /^;/)) {
|
|
ERROR("space prohibited before that '$op' $at\n" . $hereptr);
|
|
}
|
|
if ($ctx =~ /ExW/) {
|
|
ERROR("space prohibited after that '$op' $at\n" . $hereptr);
|
|
}
|
|
|
|
|
|
# << and >> may either have or not have spaces both sides
|
|
} elsif ($op eq '<<' or $op eq '>>' or
|
|
$op eq '&' or $op eq '^' or $op eq '|' or
|
|
$op eq '+' or $op eq '-' or
|
|
$op eq '*' or $op eq '/' or
|
|
$op eq '%')
|
|
{
|
|
if ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
|
|
ERROR("need consistent spacing around '$op' $at\n" .
|
|
$hereptr);
|
|
}
|
|
|
|
# All the others need spaces both sides.
|
|
} elsif ($ctx !~ /[EWC]x[CWE]/) {
|
|
# Ignore email addresses <foo@bar>
|
|
if (!($op eq '<' && $cb =~ /$;\S+\@\S+>/) &&
|
|
!($op eq '>' && $cb =~ /<\S+\@\S+$;/)) {
|
|
ERROR("spaces required around that '$op' $at\n" . $hereptr);
|
|
}
|
|
}
|
|
$off += length($elements[$n + 1]);
|
|
}
|
|
}
|
|
|
|
# check for multiple assignments
|
|
if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
|
|
CHK("multiple assignments should be avoided\n" . $herecurr);
|
|
}
|
|
|
|
## # check for multiple declarations, allowing for a function declaration
|
|
## # continuation.
|
|
## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
|
|
## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
|
|
##
|
|
## # Remove any bracketed sections to ensure we do not
|
|
## # falsly report the parameters of functions.
|
|
## my $ln = $line;
|
|
## while ($ln =~ s/\([^\(\)]*\)//g) {
|
|
## }
|
|
## if ($ln =~ /,/) {
|
|
## WARN("declaring multiple variables together should be avoided\n" . $herecurr);
|
|
## }
|
|
## }
|
|
|
|
#need space before brace following if, while, etc
|
|
if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
|
|
$line =~ /do{/) {
|
|
ERROR("space required before the open brace '{'\n" . $herecurr);
|
|
}
|
|
|
|
# closing brace should have a space following it when it has anything
|
|
# on the line
|
|
if ($line =~ /}(?!(?:,|;|\)))\S/) {
|
|
ERROR("space required after that close brace '}'\n" . $herecurr);
|
|
}
|
|
|
|
# check spacing on square brackets
|
|
if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
|
|
ERROR("space prohibited after that open square bracket '['\n" . $herecurr);
|
|
}
|
|
if ($line =~ /\s\]/) {
|
|
ERROR("space prohibited before that close square bracket ']'\n" . $herecurr);
|
|
}
|
|
|
|
# check spacing on paretheses
|
|
if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
|
|
$line !~ /for\s*\(\s+;/) {
|
|
ERROR("space prohibited after that open parenthesis '('\n" . $herecurr);
|
|
}
|
|
if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
|
|
$line !~ /for\s*\(.*;\s+\)/) {
|
|
ERROR("space prohibited before that close parenthesis ')'\n" . $herecurr);
|
|
}
|
|
|
|
#goto labels aren't indented, allow a single space however
|
|
if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
|
|
!($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
|
|
WARN("labels should not be indented\n" . $herecurr);
|
|
}
|
|
|
|
# Need a space before open parenthesis after if, while etc
|
|
if ($line=~/\b(if|while|for|switch)\(/) {
|
|
ERROR("space required before the open parenthesis '('\n" . $herecurr);
|
|
}
|
|
|
|
# Check for illegal assignment in if conditional.
|
|
if ($line =~ /\bif\s*\(/) {
|
|
my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
|
|
|
|
if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/) {
|
|
ERROR("do not use assignment in if condition\n" . $herecurr);
|
|
}
|
|
|
|
# Find out what is on the end of the line after the
|
|
# conditional.
|
|
substr($s, 0, length($c), '');
|
|
$s =~ s/\n.*//g;
|
|
$s =~ s/$;//g; # Remove any comments
|
|
if (length($c) && $s !~ /^\s*({|;|)\s*\\*\s*$/ &&
|
|
$c !~ /^.\#\s*if/)
|
|
{
|
|
ERROR("trailing statements should be on next line\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# Check for bitwise tests written as boolean
|
|
if ($line =~ /
|
|
(?:
|
|
(?:\[|\(|\&\&|\|\|)
|
|
\s*0[xX][0-9]+\s*
|
|
(?:\&\&|\|\|)
|
|
|
|
|
(?:\&\&|\|\|)
|
|
\s*0[xX][0-9]+\s*
|
|
(?:\&\&|\|\||\)|\])
|
|
)/x)
|
|
{
|
|
WARN("boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
|
|
}
|
|
|
|
# if and else should not have general statements after it
|
|
if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
|
|
my $s = $1;
|
|
$s =~ s/$;//g; # Remove any comments
|
|
if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
|
|
ERROR("trailing statements should be on next line\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# Check for }<nl>else {, these must be at the same
|
|
# indent level to be relevant to each other.
|
|
if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
|
|
$previndent == $indent) {
|
|
ERROR("else should follow close brace '}'\n" . $hereprev);
|
|
}
|
|
|
|
if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ and
|
|
$previndent == $indent) {
|
|
my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
|
|
|
|
# Find out what is on the end of the line after the
|
|
# conditional.
|
|
substr($s, 0, length($c), '');
|
|
$s =~ s/\n.*//g;
|
|
|
|
if ($s =~ /^\s*;/) {
|
|
ERROR("while should follow close brace '}'\n" . $hereprev);
|
|
}
|
|
}
|
|
|
|
#studly caps, commented out until figure out how to distinguish between use of existing and adding new
|
|
# if (($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$/) {
|
|
WARN("Whitepspace after \\ makes next lines useless\n" . $herecurr);
|
|
}
|
|
|
|
#warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
|
|
if ($tree && $rawline =~ m{^.\#\s*include\s*\<asm\/(.*)\.h\>}) {
|
|
my $checkfile = "$root/include/linux/$1.h";
|
|
if (-f $checkfile && $1 ne 'irq.h') {
|
|
WARN("Use #include <linux/$1.h> instead of <asm/$1.h>\n" .
|
|
$herecurr);
|
|
}
|
|
}
|
|
|
|
# multi-statement macros should be enclosed in a do while loop, grab the
|
|
# first statement and ensure its the whole macro if its not enclosed
|
|
# in a known good container
|
|
if ($prevline =~ /\#define.*\\/ &&
|
|
$prevline !~/(?:do\s+{|\(\{|\{)/ &&
|
|
$line !~ /(?:do\s+{|\(\{|\{)/ &&
|
|
$line !~ /^.\s*$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 $ln = $linenr;
|
|
my $cnt = $realcnt;
|
|
my $off = 0;
|
|
|
|
# If the macro starts on the define line start
|
|
# grabbing the statement after the identifier
|
|
$prevline =~ m{^(.#\s*define\s*$Ident(?:\([^\)]*\))?\s*)(.*)\\\s*$};
|
|
##print "1<$1> 2<$2>\n";
|
|
if (defined $2 && $2 ne '') {
|
|
$off = length($1);
|
|
$ln--;
|
|
$cnt++;
|
|
while ($lines[$ln - 1] =~ /^-/) {
|
|
$ln--;
|
|
$cnt++;
|
|
}
|
|
}
|
|
my @ctx = ctx_statement($ln, $cnt, $off);
|
|
my $ctx_ln = $ln + $#ctx + 1;
|
|
my $ctx = join("\n", @ctx);
|
|
|
|
# Pull in any empty extension lines.
|
|
while ($ctx =~ /\\$/ &&
|
|
$lines[$ctx_ln - 1] =~ /^.\s*(?:\\)?$/) {
|
|
$ctx .= $lines[$ctx_ln - 1];
|
|
$ctx_ln++;
|
|
}
|
|
|
|
if ($ctx =~ /\\$/) {
|
|
if ($ctx =~ /;/) {
|
|
ERROR("Macros with multiple statements should be enclosed in a do - while loop\n" . "$here\n$ctx\n");
|
|
} else {
|
|
ERROR("Macros with complex values should be enclosed in parenthesis\n" . "$here\n$ctx\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
# check for redundant bracing round if etc
|
|
if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
|
|
my ($level, $endln, @chunks) =
|
|
ctx_statement_full($linenr, $realcnt, 1);
|
|
#print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
|
|
#print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
|
|
if ($#chunks > 0 && $level == 0) {
|
|
my $allowed = 0;
|
|
my $seen = 0;
|
|
my $herectx = $here . "\n";
|
|
my $ln = $linenr - 1;
|
|
for my $chunk (@chunks) {
|
|
my ($cond, $block) = @{$chunk};
|
|
|
|
# If the condition carries leading newlines, then count those as offsets.
|
|
my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
|
|
my $offset = statement_rawlines($whitespace) - 1;
|
|
|
|
#print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
|
|
|
|
# We have looked at and allowed this specific line.
|
|
$suppress_ifbraces{$ln + $offset} = 1;
|
|
|
|
$herectx .= "$rawlines[$ln + $offset]\n[...]\n";
|
|
$ln += statement_rawlines($block) - 1;
|
|
|
|
substr($block, 0, length($cond), '');
|
|
|
|
$seen++ if ($block =~ /^\s*{/);
|
|
|
|
#print "cond<$cond> block<$block> allowed<$allowed>\n";
|
|
if (statement_lines($cond) > 1) {
|
|
#print "APW: ALLOWED: cond<$cond>\n";
|
|
$allowed = 1;
|
|
}
|
|
if ($block =~/\b(?:if|for|while)\b/) {
|
|
#print "APW: ALLOWED: block<$block>\n";
|
|
$allowed = 1;
|
|
}
|
|
if (statement_block_size($block) > 1) {
|
|
#print "APW: ALLOWED: lines block<$block>\n";
|
|
$allowed = 1;
|
|
}
|
|
}
|
|
if ($seen && !$allowed) {
|
|
WARN("braces {} are not necessary for any arm of this statement\n" . $herectx);
|
|
}
|
|
}
|
|
}
|
|
if (!defined $suppress_ifbraces{$linenr - 1} &&
|
|
$line =~ /\b(if|while|for|else)\b/) {
|
|
my $allowed = 0;
|
|
|
|
# Check the pre-context.
|
|
if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
|
|
#print "APW: ALLOWED: pre<$1>\n";
|
|
$allowed = 1;
|
|
}
|
|
|
|
my ($level, $endln, @chunks) =
|
|
ctx_statement_full($linenr, $realcnt, $-[0]);
|
|
|
|
# Check the condition.
|
|
my ($cond, $block) = @{$chunks[0]};
|
|
#print "CHECKING<$linenr> cond<$cond> block<$block>\n";
|
|
if (defined $cond) {
|
|
substr($block, 0, length($cond), '');
|
|
}
|
|
if (statement_lines($cond) > 1) {
|
|
#print "APW: ALLOWED: cond<$cond>\n";
|
|
$allowed = 1;
|
|
}
|
|
if ($block =~/\b(?:if|for|while)\b/) {
|
|
#print "APW: ALLOWED: block<$block>\n";
|
|
$allowed = 1;
|
|
}
|
|
if (statement_block_size($block) > 1) {
|
|
#print "APW: ALLOWED: lines block<$block>\n";
|
|
$allowed = 1;
|
|
}
|
|
# Check the post-context.
|
|
if (defined $chunks[1]) {
|
|
my ($cond, $block) = @{$chunks[1]};
|
|
if (defined $cond) {
|
|
substr($block, 0, length($cond), '');
|
|
}
|
|
if ($block =~ /^\s*\{/) {
|
|
#print "APW: ALLOWED: chunk-1 block<$block>\n";
|
|
$allowed = 1;
|
|
}
|
|
}
|
|
if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
|
|
my $herectx = $here . "\n";;
|
|
my $end = $linenr + statement_rawlines($block) - 1;
|
|
|
|
for (my $ln = $linenr - 1; $ln < $end; $ln++) {
|
|
$herectx .= $rawlines[$ln] . "\n";;
|
|
}
|
|
|
|
WARN("braces {} are not necessary for single statement blocks\n" . $herectx);
|
|
}
|
|
}
|
|
|
|
# don't include deprecated include files (uses RAW line)
|
|
for my $inc (@dep_includes) {
|
|
if ($rawline =~ m@\#\s*include\s*\<$inc>@) {
|
|
ERROR("Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# don't use deprecated functions
|
|
for my $func (@dep_functions) {
|
|
if ($line =~ /\b$func\b/) {
|
|
ERROR("Don't use $func(): see Documentation/feature-removal-schedule.txt\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# no volatiles please
|
|
my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
|
|
if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
|
|
WARN("Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
|
|
}
|
|
|
|
# SPIN_LOCK_UNLOCKED & RW_LOCK_UNLOCKED are deprecated
|
|
if ($line =~ /\b(SPIN_LOCK_UNLOCKED|RW_LOCK_UNLOCKED)/) {
|
|
ERROR("Use of $1 is deprecated: see Documentation/spinlocks.txt\n" . $herecurr);
|
|
}
|
|
|
|
# warn about #if 0
|
|
if ($line =~ /^.#\s*if\s+0\b/) {
|
|
CHK("if this code is redundant consider removing it\n" .
|
|
$herecurr);
|
|
}
|
|
|
|
# check for needless kfree() checks
|
|
if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
|
|
my $expr = $1;
|
|
if ($line =~ /\bkfree\(\Q$expr\E\);/) {
|
|
WARN("kfree(NULL) is safe this check is probabally not required\n" . $hereprev);
|
|
}
|
|
}
|
|
|
|
# warn about #ifdefs in C files
|
|
# if ($line =~ /^.#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
|
|
# print "#ifdef in C files should be avoided\n";
|
|
# print "$herecurr";
|
|
# $clean = 0;
|
|
# }
|
|
|
|
# warn about spacing in #ifdefs
|
|
if ($line =~ /^.#\s*(ifdef|ifndef|elif)\s\s+/) {
|
|
ERROR("exactly one space required after that #$1\n" . $herecurr);
|
|
}
|
|
|
|
# check for spinlock_t definitions without a comment.
|
|
if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/) {
|
|
my $which = $1;
|
|
if (!ctx_has_comment($first_line, $linenr)) {
|
|
CHK("$1 definition without comment\n" . $herecurr);
|
|
}
|
|
}
|
|
# check for memory barriers without a comment.
|
|
if ($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)) {
|
|
CHK("memory barrier without comment\n" . $herecurr);
|
|
}
|
|
}
|
|
# check of hardware specific defines
|
|
if ($line =~ m@^.#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
|
|
CHK("architecture specific defines should be avoided\n" . $herecurr);
|
|
}
|
|
|
|
# check the location of the inline attribute, that it is between
|
|
# storage class and type.
|
|
if ($line =~ /\b$Type\s+$Inline\b/ ||
|
|
$line =~ /\b$Inline\s+$Storage\b/) {
|
|
ERROR("inline keyword should sit between storage class and type\n" . $herecurr);
|
|
}
|
|
|
|
# Check for __inline__ and __inline, prefer inline
|
|
if ($line =~ /\b(__inline__|__inline)\b/) {
|
|
WARN("plain inline is preferred over $1\n" . $herecurr);
|
|
}
|
|
|
|
# check for new externs in .c files.
|
|
if ($line =~ /^.\s*extern\s/ && ($realfile =~ /\.c$/)) {
|
|
WARN("externs should be avoided in .c files\n" . $herecurr);
|
|
}
|
|
|
|
# checks for new __setup's
|
|
if ($rawline =~ /\b__setup\("([^"]*)"/) {
|
|
my $name = $1;
|
|
|
|
if (!grep(/$name/, @setup_docs)) {
|
|
CHK("__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# check for pointless casting of kmalloc return
|
|
if ($line =~ /\*\s*\)\s*k[czm]alloc\b/) {
|
|
WARN("unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
|
|
}
|
|
|
|
# check for gcc specific __FUNCTION__
|
|
if ($line =~ /__FUNCTION__/) {
|
|
WARN("__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr);
|
|
}
|
|
|
|
# check for semaphores used as mutexes
|
|
if ($line =~ /\b(DECLARE_MUTEX|init_MUTEX)\s*\(/) {
|
|
WARN("mutexes are preferred for single holder semaphores\n" . $herecurr);
|
|
}
|
|
# check for semaphores used as mutexes
|
|
if ($line =~ /\binit_MUTEX_LOCKED\s*\(/) {
|
|
WARN("consider using a completion\n" . $herecurr);
|
|
}
|
|
# recommend strict_strto* over simple_strto*
|
|
if ($line =~ /\bsimple_(strto.*?)\s*\(/) {
|
|
WARN("consider using strict_$1 in preference to simple_$1\n" . $herecurr);
|
|
}
|
|
|
|
# use of NR_CPUS is usually wrong
|
|
# ignore definitions of NR_CPUS and usage to define arrays as likely right
|
|
if ($line =~ /\bNR_CPUS\b/ &&
|
|
$line !~ /^.#\s*define\s+NR_CPUS\s+/ &&
|
|
$line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/)
|
|
{
|
|
WARN("usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
|
|
}
|
|
}
|
|
|
|
# If we have no input at all, then there is nothing to report on
|
|
# so just keep quiet.
|
|
if ($#rawlines == -1) {
|
|
exit(0);
|
|
}
|
|
|
|
# In mailback mode only produce a report in the negative, for
|
|
# things that appear to be patches.
|
|
if ($mailback && ($clean == 1 || !$is_patch)) {
|
|
exit(0);
|
|
}
|
|
|
|
# This is not a patch, and we are are in 'no-patch' mode so
|
|
# just keep quiet.
|
|
if (!$chk_patch && !$is_patch) {
|
|
exit(0);
|
|
}
|
|
|
|
if (!$is_patch) {
|
|
ERROR("Does not appear to be a unified-diff format patch\n");
|
|
}
|
|
if ($is_patch && $chk_signoff && $signoff == 0) {
|
|
ERROR("Missing Signed-off-by: line(s)\n");
|
|
}
|
|
|
|
print report_dump();
|
|
if ($summary && !($clean == 1 && $quiet == 1)) {
|
|
print "$filename " if ($summary_file);
|
|
print "total: $cnt_error errors, $cnt_warn warnings, " .
|
|
(($check)? "$cnt_chk checks, " : "") .
|
|
"$cnt_lines lines checked\n";
|
|
print "\n" if ($quiet == 0);
|
|
}
|
|
|
|
if ($clean == 1 && $quiet == 0) {
|
|
print "$vname has no obvious style problems and is ready for submission.\n"
|
|
}
|
|
if ($clean == 0 && $quiet == 0) {
|
|
print "$vname 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;
|
|
}
|