| Kernel v2.6.24-rc8 /scripts/checkpatch.pl |
|---|
  2.6.24-rc8
scripts
 checkpatch.pl
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index dae7d30..579f50f 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -9,7 +9,7 @@ use strict;
my $P = $0;
$P =~ s@.*/@@g;
-my $V = '0.09';
+my $V = '0.12';
use Getopt::Long qw(:config no_auto_abbrev);
@@ -18,12 +18,27 @@ my $tree = 1;
my $chk_signoff = 1;
my $chk_patch = 1;
my $tst_type = 0;
+my $emacs = 0;
+my $terse = 0;
+my $file = 0;
+my $check = 0;
+my $summary = 1;
+my $mailback = 0;
+my $root;
GetOptions(
- 'q|quiet' => \$quiet,
+ 'q|quiet+' => \$quiet,
'tree!' => \$tree,
'signoff!' => \$chk_signoff,
'patch!' => \$chk_patch,
'test-type!' => \$tst_type,
+ 'emacs!' => \$emacs,
+ 'terse!' => \$terse,
+ 'file!' => \$file,
+ 'subjective!' => \$check,
+ 'strict!' => \$check,
+ 'root=s' => \$root,
+ 'summary!' => \$summary,
+ 'mailback!' => \$mailback,
) or exit;
my $exit = 0;
@@ -33,19 +48,124 @@ if ($#ARGV < 0) {
print "version: $V\n";
print "options: -q => quiet\n";
print " --no-tree => run without a kernel tree\n";
+ print " --terse => one line per report\n";
+ print " --emacs => emacs compile window format\n";
+ print " --file => check a source file\n";
+ print " --strict => enable more subjective tests\n";
+ print " --root => path to the kernel tree root\n";
exit(1);
}
-if ($tree && !top_of_kernel_tree()) {
- print "Must be run from the top-level dir. of a kernel tree\n";
- exit(2);
+if ($terse) {
+ $emacs = 1;
+ $quiet++;
}
+if ($tree) {
+ if (defined $root) {
+ if (!top_of_kernel_tree($root)) {
+ die "$P: $root: --root does not point at a valid tree\n";
+ }
+ } else {
+ if (top_of_kernel_tree('.')) {
+ $root = '.';
+ } elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
+ top_of_kernel_tree($1)) {
+ $root = $1;
+ }
+ }
+
+ if (!defined $root) {
+ print "Must be run from the top-level dir. of a kernel tree\n";
+ exit(2);
+ }
+}
+
+my $emitted_corrupt = 0;
+
+our $Ident = qr{[A-Za-z_][A-Za-z\d_]*};
+our $Storage = qr{extern|static|asmlinkage};
+our $Sparse = qr{
+ __user|
+ __kernel|
+ __force|
+ __iomem|
+ __must_check|
+ __init_refok|
+ __kprobes|
+ fastcall
+ }x;
+our $Attribute = qr{
+ const|
+ __read_mostly|
+ __kprobes|
+ __(?:mem|cpu|dev|)(?:initdata|init)
+ }x;
+our $Inline = qr{inline|__always_inline|noinline};
+our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
+our $Lval = qr{$Ident(?:$Member)*};
+
+our $Constant = qr{(?:[0-9]+|0x[0-9a-fA-F]+)[UL]*};
+our $Assignment = qr{(?:\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=)};
+our $Operators = qr{
+ <=|>=|==|!=|
+ =>|->|<<|>>|<|>|!|~|
+ &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/
+ }x;
+
+our $NonptrType;
+our $Type;
+our $Declare;
+
+our @typeList = (
+ qr{void},
+ qr{char},
+ qr{short},
+ qr{int},
+ qr{long},
+ qr{unsigned},
+ qr{float},
+ qr{double},
+ qr{bool},
+ qr{long\s+int},
+ qr{long\s+long},
+ qr{long\s+long\s+int},
+ qr{(?:__)?(?:u|s|be|le)(?:8|16|32|64)},
+ qr{struct\s+$Ident},
+ qr{union\s+$Ident},
+ qr{enum\s+$Ident},
+ qr{${Ident}_t},
+ qr{${Ident}_handler},
+ qr{${Ident}_handler_fn},
+);
+
+sub build_types {
+ my $all = "(?: \n" . join("|\n ", @typeList) . "\n)";
+ $NonptrType = qr{
+ \b
+ (?:const\s+)?
+ (?:unsigned\s+)?
+ $all
+ (?:\s+$Sparse|\s+const)*
+ \b
+ }x;
+ $Type = qr{
+ \b$NonptrType\b
+ (?:\s*\*+\s*const|\s*\*+|(?:\s*\[\s*\])+)?
+ (?:\s+$Sparse|\s+$Attribute)*
+ }x;
+ $Declare = qr{(?:$Storage\s+)?$Type};
+}
+build_types();
+
+$chk_signoff = 0 if ($file);
+
my @dep_includes = ();
my @dep_functions = ();
-my $removal = 'Documentation/feature-removal-schedule.txt';
-if ($tree && -f $removal) {
- open(REMOVE, "<$removal") || die "$P: $removal: open failed - $!\n";
+my $removal = "Documentation/feature-removal-schedule.txt";
+if ($tree && -f "$root/$removal") {
+ open(REMOVE, "<$root/$removal") ||
+ die "$P: $removal: open failed - $!\n";
while (<REMOVE>) {
if (/^Check:\s+(.*\S)/) {
for my $entry (split(/[, ]+/, $1)) {
@@ -61,28 +181,42 @@ if ($tree && -f $removal) {
}
my @rawlines = ();
-while (<>) {
- chomp;
- push(@rawlines, $_);
- if (eof(ARGV)) {
- if (!process($ARGV, @rawlines)) {
- $exit = 1;
- }
- @rawlines = ();
+for my $filename (@ARGV) {
+ if ($file) {
+ open(FILE, "diff -u /dev/null $filename|") ||
+ die "$P: $filename: diff failed - $!\n";
+ } else {
+ open(FILE, "<$filename") ||
+ die "$P: $filename: open failed - $!\n";
+ }
+ while (<FILE>) {
+ chomp;
+ push(@rawlines, $_);
}
+ close(FILE);
+ if (!process($filename, @rawlines)) {
+ $exit = 1;
+ }
+ @rawlines = ();
}
exit($exit);
sub top_of_kernel_tree {
- if ((-f "COPYING") && (-f "CREDITS") && (-f "Kbuild") &&
- (-f "MAINTAINERS") && (-f "Makefile") && (-f "README") &&
- (-d "Documentation") && (-d "arch") && (-d "include") &&
- (-d "drivers") && (-d "fs") && (-d "init") && (-d "ipc") &&
- (-d "kernel") && (-d "lib") && (-d "scripts")) {
- return 1;
+ my ($root) = @_;
+
+ my @tree_check = (
+ "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
+ "README", "Documentation", "arch", "include", "drivers",
+ "fs", "init", "ipc", "kernel", "lib", "scripts",
+ );
+
+ foreach my $check (@tree_check) {
+ if (! -e $root . '/' . $check) {
+ return 0;
+ }
}
- return 0;
+ return 1;
}
sub expand_tabs {
@@ -105,6 +239,20 @@ sub expand_tabs {
return $res;
}
+sub copy_spacing {
+ my ($str) = @_;
+
+ my $res = '';
+ for my $c (split(//, $str)) {
+ if ($c eq "\t") {
+ $res .= $c;
+ } else {
+ $res .= ' ';
+ }
+ }
+
+ return $res;
+}
sub line_stats {
my ($line) = @_;
@@ -150,6 +298,81 @@ sub sanitise_line {
return $res;
}
+sub ctx_statement_block {
+ my ($linenr, $remain, $off) = @_;
+ my $line = $linenr - 1;
+ my $blk = '';
+ my $soff = $off;
+ my $coff = $off - 1;
+
+ my $type = '';
+ my $level = 0;
+ my $c;
+ my $len = 0;
+ while (1) {
+ #warn "CSB: blk<$blk>\n";
+ # If we are about to drop off the end, pull in more
+ # context.
+ if ($off >= $len) {
+ for (; $remain > 0; $line++) {
+ next if ($rawlines[$line] =~ /^-/);
+ $remain--;
+ $blk .= sanitise_line($rawlines[$line]) . "\n";
+ $len = length($blk);
+ $line++;
+ last;
+ }
+ # Bail if there is no further context.
+ #warn "CSB: blk<$blk> off<$off> len<$len>\n";
+ if ($off == $len) {
+ last;
+ }
+ }
+ $c = substr($blk, $off, 1);
+
+ #warn "CSB: c<$c> type<$type> level<$level>\n";
+ # Statement ends at the ';' or a close '}' at the
+ # outermost level.
+ if ($level == 0 && $c eq ';') {
+ last;
+ }
+
+ if (($type eq '' || $type eq '(') && $c eq '(') {
+ $level++;
+ $type = '(';
+ }
+ if ($type eq '(' && $c eq ')') {
+ $level--;
+ $type = ($level != 0)? '(' : '';
+
+ if ($level == 0 && $coff < $soff) {
+ $coff = $off;
+ }
+ }
+ if (($type eq '' || $type eq '{') && $c eq '{') {
+ $level++;
+ $type = '{';
+ }
+ if ($type eq '{' && $c eq '}') {
+ $level--;
+ $type = ($level != 0)? '{' : '';
+
+ if ($level == 0) {
+ last;
+ }
+ }
+ $off++;
+ }
+
+ my $statement = substr($blk, $soff, $off - $soff + 1);
+ my $condition = substr($blk, $soff, $coff - $soff + 1);
+
+ #warn "STATEMENT<$statement>\n";
+ #warn "CONDITION<$condition>\n";
+
+ return ($statement, $condition);
+}
+
sub ctx_block_get {
my ($linenr, $remain, $outer, $open, $close, $off) = @_;
my $line;
@@ -212,6 +435,11 @@ sub ctx_block_level {
return ctx_block_get($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, $end_line) = @_;
@@ -257,16 +485,152 @@ sub ctx_has_comment {
sub cat_vet {
my ($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 $res;
+}
+
+sub annotate_values {
+ my ($stream, $type) = @_;
+
+ my $res;
+ my $cur = $stream;
+
+ my $debug = 0;
+
+ print "$stream\n" if ($debug);
+
+ ##my $type = 'N';
+ my $pos = 0;
+ my $preprocessor = 0;
+ my $paren = 0;
+ my @paren_type;
+
+ while (length($cur)) {
+ print " <$type> " if ($debug);
+ if ($cur =~ /^(\s+)/o) {
+ print "WS($1)\n" if ($debug);
+ if ($1 =~ /\n/ && $preprocessor) {
+ $preprocessor = 0;
+ $type = 'N';
+ }
+
+ } elsif ($cur =~ /^($Type)/) {
+ print "DECLARE($1)\n" if ($debug);
+ $type = 'T';
+
+ } elsif ($cur =~ /^(#\s*define\s*$Ident)(\(?)/o) {
+ print "DEFINE($1)\n" if ($debug);
+ $preprocessor = 1;
+ $paren_type[$paren] = 'N';
+
+ } elsif ($cur =~ /^(#\s*(?:ifdef|ifndef|if|else|endif))/o) {
+ print "PRE($1)\n" if ($debug);
+ $preprocessor = 1;
+ $type = 'N';
+
+ } elsif ($cur =~ /^(\\\n)/o) {
+ print "PRECONT($1)\n" if ($debug);
+
+ } elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
+ print "SIZEOF($1)\n" if ($debug);
+ if (defined $2) {
+ $paren_type[$paren] = 'V';
+ }
+ $type = 'N';
+
+ } elsif ($cur =~ /^(if|while|typeof|for)\b/o) {
+ print "COND($1)\n" if ($debug);
+ $paren_type[$paren] = 'N';
+ $type = 'N';
+
+ } elsif ($cur =~/^(return|case|else)/o) {
+ print "KEYWORD($1)\n" if ($debug);
+ $type = 'N';
+
+ } elsif ($cur =~ /^(\()/o) {
+ print "PAREN('$1')\n" if ($debug);
+ $paren++;
+ $type = 'N';
+
+ } elsif ($cur =~ /^(\))/o) {
+ $paren-- if ($paren > 0);
+ if (defined $paren_type[$paren]) {
+ $type = $paren_type[$paren];
+ undef $paren_type[$paren];
+ print "PAREN('$1') -> $type\n" if ($debug);
+ } else {
+ print "PAREN('$1')\n" if ($debug);
+ }
+
+ } elsif ($cur =~ /^($Ident)\(/o) {
+ print "FUNC($1)\n" if ($debug);
+ $paren_type[$paren] = 'V';
+
+ } elsif ($cur =~ /^($Ident|$Constant)/o) {
+ print "IDENT($1)\n" if ($debug);
+ $type = 'V';
+
+ } elsif ($cur =~ /^($Assignment)/o) {
+ print "ASSIGN($1)\n" if ($debug);
+ $type = 'N';
+
+ } elsif ($cur =~ /^(;|{|}|\?|:|\[)/o) {
+ print "END($1)\n" if ($debug);
+ $type = 'N';
+
+ } elsif ($cur =~ /^($Operators)/o) {
+ print "OP($1)\n" if ($debug);
+ if ($1 ne '++' && $1 ne '--') {
+ $type = 'N';
+ }
+
+ } elsif ($cur =~ /(^.)/o) {
+ print "C($1)\n" if ($debug);
+ }
+ if (defined $1) {
+ $cur = substr($cur, length($1));
+ $res .= $type x length($1);
+ }
+ }
- $vet =~ s/\t/^I/;
- $vet =~ s/$/\$/;
+ return $res;
+}
- return $vet;
+sub possible {
+ my ($possible) = @_;
+
+ #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' &&
+ $possible ne 'typedef') {
+ #print "POSSIBLE<$possible>\n";
+ push(@typeList, $possible);
+ build_types();
+ }
}
+my $prefix = '';
+
my @report = ();
sub report {
- push(@report, $_[0]);
+ my $line = $prefix . $_[0];
+
+ $line = (split('\n', $line))[0] . "\n" if ($terse);
+
+ push(@report, $line);
}
sub report_dump {
@report;
@@ -274,14 +638,19 @@ sub report_dump {
sub ERROR {
report("ERROR: $_[0]\n");
our $clean = 0;
+ our $cnt_error++;
}
sub WARN {
report("WARNING: $_[0]\n");
our $clean = 0;
+ our $cnt_warn++;
}
sub CHK {
- report("CHECK: $_[0]\n");
- our $clean = 0;
+ if ($check) {
+ report("CHECK: $_[0]\n");
+ our $clean = 0;
+ our $cnt_chk++;
+ }
}
sub process {
@@ -301,6 +670,11 @@ sub process {
my $signoff = 0;
my $is_patch = 0;
+ 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;
@@ -309,46 +683,7 @@ sub process {
my $in_comment = 0;
my $first_line = 0;
- my $Ident = qr{[A-Za-z\d_]+};
- my $Storage = qr{extern|static};
- my $Sparse = qr{__user|__kernel|__force|__iomem|__must_check|__init_refok};
- my $NonptrType = qr{
- \b
- (?:const\s+)?
- (?:unsigned\s+)?
- (?:
- void|
- char|
- short|
- int|
- long|
- unsigned|
- float|
- double|
- bool|
- long\s+int|
- long\s+long|
- long\s+long\s+int|
- u8|u16|u32|u64|
- s8|s16|s32|s64|
- struct\s+$Ident|
- union\s+$Ident|
- enum\s+$Ident|
- ${Ident}_t
- )
- (?:\s+$Sparse)*
- \b
- }x;
- my $Type = qr{
- \b$NonptrType\b
- (?:\s*\*+\s*const|\s*\*+|(?:\s*\[\s*\])+)?
- (?:\s+$Sparse)*
- }x;
- my $Declare = qr{(?:$Storage\s+)?$Type};
- my $Attribute = qr{const|__read_mostly|__init|__initdata|__meminit};
-
- my $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
- my $Lval = qr{$Ident(?:$Member)*};
+ my $prev_values = 'N';
# Pre-scan the patch looking for any __setup documentation.
my @setup_docs = ();
@@ -367,11 +702,14 @@ sub process {
}
}
+ $prefix = '';
+
foreach my $line (@lines) {
$linenr++;
my $rawline = $line;
+
#extract the filename as it passes
if ($line=~/^\+\+\+\s+(\S+)/) {
$realfile=$1;
@@ -380,7 +718,7 @@ sub process {
next;
}
#extract the line range in the file after the patch is applied
- if ($line=~/^\@\@ -\d+,\d+ \+(\d+)(,(\d+))? \@\@/) {
+ if ($line=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
$is_patch = 1;
$first_line = $linenr + 1;
$in_comment = 0;
@@ -390,6 +728,7 @@ sub process {
} else {
$realcnt=1+1;
}
+ $prev_values = 'N';
next;
}
@@ -400,21 +739,35 @@ sub process {
$realline++;
$realcnt-- if ($realcnt != 0);
- # track any sort of multi-line comment. Obviously if
- # the added text or context do not include the whole
- # comment we will not see it. Such is life.
- #
+ # 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.
+ if ($linenr == $first_line) {
+ my $edge;
+ for (my $ln = $first_line; $ln < ($linenr + $realcnt); $ln++) {
+ ($edge) = ($lines[$ln - 1] =~ m@(/\*|\*/)@);
+ last if (defined $edge);
+ }
+ if (defined $edge && $edge eq '*/') {
+ $in_comment = 1;
+ }
+ }
+
# Guestimate if this is a continuing comment. If this
# is the start of a diff block and this line starts
# ' *' then it is very likely a comment.
if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
$in_comment = 1;
}
- if ($line =~ m@/\*@) {
- $in_comment = 1;
- }
- if ($line =~ m@\*/@) {
- $in_comment = 0;
+
+ # Find the last comment edge on _this_ line.
+ while (($line =~ m@(/\*|\*/)@g)) {
+ if ($1 eq '/*') {
+ $in_comment = 1;
+ } else {
+ $in_comment = 0;
+ }
}
# Measure the line length and indent.
@@ -423,18 +776,24 @@ sub process {
# Track the previous line.
($prevline, $stashline) = ($stashline, $line);
($previndent, $stashindent) = ($stashindent, $indent);
+
} elsif ($realcnt == 1) {
$realcnt--;
}
#make up the handle for any error we report on this line
- $here = "#$linenr: ";
+ $here = "#$linenr: " if (!$file);
+ $here = "#$realline: " if ($file);
$here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
my $hereline = "$here\n$line\n";
my $herecurr = "$here\n$line\n";
my $hereprev = "$here\n$prevline\n$line\n";
+ $prefix = "$filename:$realline: " if ($emacs && $file);
+ $prefix = "$filename:$linenr: " if ($emacs && !$file);
+ $cnt_lines++ if ($realcnt != 0);
+
#check the patch for a signoff:
if ($line =~ /^\s*signed-off-by:/i) {
# This is a signoff, if ugly, so do not double report.
@@ -450,9 +809,9 @@ sub process {
}
# Check for wrappage within a valid hunk of the file
- if ($realcnt != 0 && $line !~ m{^(?:\+|-| |$)}) {
+ if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
ERROR("patch seems to be corrupt (line wrapped?)\n" .
- $herecurr);
+ $herecurr) if (!$emitted_corrupt++);
}
# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
@@ -477,7 +836,11 @@ sub process {
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
#trailing whitespace
- if ($line =~ /^\+.*\S\s+$/ || $line =~ /^\+\s+$/) {
+ if ($line =~ /^\+.*\015/) {
+ my $herevet = "$here\n" . cat_vet($line) . "\n";
+ ERROR("DOS line endings\n" . $herevet);
+
+ } elsif ($line =~ /^\+.*\S\s+$/ || $line =~ /^\+\s+$/) {
my $herevet = "$here\n" . cat_vet($line) . "\n";
ERROR("trailing whitespace\n" . $herevet);
}
@@ -486,6 +849,11 @@ sub process {
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]$/);
@@ -509,6 +877,45 @@ sub process {
# Standardise the strings and chars within the input to simplify matching.
$line = sanitise_line($line);
+# Check for potential 'bare' types
+ if ($realcnt &&
+ $line !~ /$Ident:\s*$/ &&
+ ($line =~ /^.\s*$Ident\s*\(\*+\s*$Ident\)\s*\(/ ||
+ $line !~ /^.\s*$Ident\s*\(/)) {
+ # definitions in global scope can only start with types
+ if ($line =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b/) {
+ possible($1);
+
+ # declarations always start with types
+ } elsif ($prev_values eq 'N' && $line =~ /^.\s*(?:$Storage\s+)?($Ident)\b\s*\**\s*$Ident\s*(?:;|=)/) {
+ possible($1);
+
+ # any (foo ... *) is a pointer cast, and foo is a type
+ } elsif ($line =~ /\(($Ident)(?:\s+$Sparse)*\s*\*+\s*\)/) {
+ possible($1);
+ }
+
+ # Check for any sort of function declaration.
+ # int foo(something bar, other baz);
+ # void (*store_gdt)(x86_descr_ptr *);
+ if ($prev_values eq 'N' && $line =~ /^(.(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/) {
+ my ($name_len) = length($1);
+ my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, $name_len);
+ my $ctx = join("\n", @ctx);
+
+ $ctx =~ s/\n.//;
+ substr($ctx, 0, $name_len + 1) = '';
+ $ctx =~ s/\)[^\)]*$//;
+ for my $arg (split(/\s*,\s*/, $ctx)) {
+ if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/ || $arg =~ /^($Ident)$/) {
+
+ possible($1);
+ }
+ }
+ }
+
+ }
+
#
# Checks which may be anchored in the context.
#
@@ -531,18 +938,19 @@ sub process {
}
}
if ($err ne '') {
- ERROR("switch and case should be at the same indent\n$hereline\n$err\n");
+ 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*\(|do\b|else\b)/ && $line !~ /^.#/) {
- my @ctx = ctx_statement($linenr, $realcnt, 0);
+ my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
my $ctx_ln = $linenr + $#ctx + 1;
my $ctx_cnt = $realcnt - $#ctx - 1;
my $ctx = join("\n", @ctx);
+ # Skip over any removed lines in the context following statement.
while ($ctx_cnt > 0 && $lines[$ctx_ln - 1] =~ /^-/) {
$ctx_ln++;
$ctx_cnt--;
@@ -553,8 +961,23 @@ sub process {
ERROR("That open brace { should be on the previous line\n" .
"$here\n$ctx\n$lines[$ctx_ln - 1]");
}
+ if ($level == 0 && $ctx =~ /\)\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;
+ #warn "--> $opline\n";
+ #warn "--> $curr_values ($prev_values)\n";
+ $prev_values = substr($curr_values, -1);
+
#ignore lines not being added
if ($line=~/^[^\+]/) {next;}
@@ -592,6 +1015,7 @@ sub process {
}
# Remove C99 comments.
$line =~ s@//.*@@;
+ $opline =~ s@//.*@@;
#EXPORT_SYMBOL should immediately follow its function closing }.
if (($line =~ /EXPORT_SYMBOL.*\((.*)\)/) ||
@@ -619,7 +1043,7 @@ sub process {
# 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*\(/ &&
+ $line !~ /\btypedef\s+$Type\s+\(\s*\*?$Ident\s*\)\s*\(/ &&
$line !~ /\b__bitwise(?:__|)\b/) {
WARN("do not add new typedefs\n" . $herecurr);
}
@@ -633,11 +1057,11 @@ sub process {
ERROR("\"(foo $1 )\" should be \"(foo $1)\"\n" .
$herecurr);
- } elsif ($line =~ m{$NonptrType(\*+)(?:\s+$Attribute)?\s+[A-Za-z\d_]+}) {
+ } 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)\s+[A-Za-z\d_]+}) {
+ } elsif ($line =~ m{$NonptrType\s+(\*+)(?!\s+(?:$Attribute|$Sparse))\s+[A-Za-z\d_]+}) {
ERROR("\"foo $1 bar\" should be \"foo $1bar\"\n" .
$herecurr);
}
@@ -649,6 +1073,10 @@ sub process {
# $clean = 0;
# }
+ if ($line =~ /\bLINUX_VERSION_CODE\b/) {
+ WARN("LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged" . $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
@@ -679,22 +1107,32 @@ sub process {
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" . $hereprev);
+ }
+
# check for spaces between functions and their parentheses.
- if ($line =~ /($Ident)\s+\(/ &&
- $1 !~ /^(?:if|for|while|switch|return|volatile|__volatile__|__attribute__|format|__extension__|Copyright)$/ &&
- $line !~ /$Type\s+\(/ && $line !~ /^.\#\s*define\b/) {
- WARN("no space between function name and open parenthesis '('\n" . $herecurr);
+ while ($line =~ /($Ident)\s+\(/g) {
+ if ($1 !~ /^(?:if|for|while|switch|return|volatile|__volatile__|__attribute__|format|__extension__|Copyright|case)$/ &&
+ $line !~ /$Type\s+\(/ && $line !~ /^.\#\s*define\b/) {
+ WARN("no space between function name and open parenthesis '('\n" . $herecurr);
+ }
}
# 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(/(<<=|>>=|<=|>=|==|!=|\+=|-=|\*=|\/=|%=|\^=|\|=|&=|=>|->|<<|>>|&l+
t;|>|=|!|~|&&|\|\||,|\^|\+\+|--|;|&|\||\+|-|\*|\/\/|\/)/, $opline);
+ 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]);
@@ -730,10 +1168,25 @@ sub process {
my $at = "(ctx:$ctx)";
- my $ptr = (" " x $off) . "^";
+ my $ptr = substr($blank, 0, $off) . "^";
my $hereptr = "$hereline$ptr\n";
- ##print "<$s1:$op:$s2> <$elements[$n]:$elements[$n + 1]:$elements[$n + 2]>\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";
+ #}
# ; should have either the end of line or a space or \ after it
if ($op eq ';') {
@@ -757,9 +1210,16 @@ sub process {
ERROR("need space after that '$op' $at\n" . $hereptr);
}
- # unary ! and unary ~ are allowed no space on the right
- } elsif ($op eq '!' or $op eq '~') {
- if ($ctx !~ /[WOEB]x./) {
+ # '*' 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 !~ /[WEB]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
ERROR("need space before that '$op' $at\n" . $hereptr);
}
if ($ctx =~ /.xW/) {
@@ -775,39 +1235,13 @@ sub process {
ERROR("no space before that '$op' $at\n" . $hereptr);
}
- # & is both unary and binary
- # unary:
- # a &b
- # binary (consistent spacing):
- # a&b OK
- # a & b OK
- #
- # boiling down to: if there is a space on the right then there
- # should be one on the left.
- #
- # - is the same
- #
- } elsif ($op eq '&' or $op eq '-') {
- if ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]/) {
- ERROR("need space before that '$op' $at\n" . $hereptr);
- }
-
- # * is the same as & only adding:
- # type:
- # (foo *)
- # (foo **)
- #
- } elsif ($op eq '*') {
- if ($ca !~ /$Type$/ && $cb !~ /(\*$;|$;\*)/ &&
- $ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]|OxV|WxB|BxB/) {
- ERROR("need space before that '$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 $op eq '|')
+ } elsif ($op eq '<<' or $op eq '>>' or
+ $op eq '&' or $op eq '^' or $op eq '|' or
+ $op eq '+' or $op eq '-' or
+ $op eq '*' or $op eq '/')
{
- if ($ctx !~ /VxV|WxW|VxE|WxE/) {
+ if ($ctx !~ /VxV|WxW|VxE|WxE|VxO/) {
ERROR("need consistent spacing around '$op' $at\n" .
$hereptr);
}
@@ -826,7 +1260,7 @@ sub process {
# check for multiple assignments
if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
- WARN("multiple assignments should be avoided\n" . $herecurr);
+ CHK("multiple assignments should be avoided\n" . $herecurr);
}
## # check for multiple declarations, allowing for a function declaration
@@ -865,10 +1299,12 @@ sub process {
}
# check spacing on paretheses
- if ($line =~ /\(\s/ && $line !~ /\(\s*$/) {
+ if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
+ $line !~ /for\s*\(\s+;/) {
ERROR("no space after that open parenthesis '('\n" . $herecurr);
}
- if ($line =~ /\s\)/) {
+ if ($line =~ /\s\)/ && $line !~ /^.\s*\)/ &&
+ $line !~ /for\s*\(.*;\s+\)/) {
ERROR("no space before that close parenthesis ')'\n" . $herecurr);
}
@@ -884,9 +1320,27 @@ sub process {
}
# Check for illegal assignment in if conditional.
- if ($line=~/\bif\s*\(.*[^<>!=]=[^=].*\)/) {
- #next if ($line=~/\".*\Q$op\E.*\"/ or $line=~/\'\Q$op\E\'/);
- ERROR("do not use assignment in if condition\n" . $herecurr);
+ if ($line =~ /\bif\s*\(/) {
+ my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
+
+ if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/) {
+ ERROR("do not use assignment in if condition ($c)\n" . $herecurr);
+ }
+
+ # Find out what is on the end of the line after the
+ # conditional.
+ substr($s, 0, length($c)) = '';
+ $s =~ s/\n.*//g;
+
+ if (length($c) && $s !~ /^\s*({|;|\/\*.*\*\/)?\s*\\*\s*$/) {
+ ERROR("trailing statements should be on next line\n" . $herecurr);
+ }
+ }
+
+# if and else should not have general statements after it
+ if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/ &&
+ $1 !~ /^\s*(?:\sif|{|\\|$)/) {
+ ERROR("trailing statements should be on next line\n" . $herecurr);
}
# Check for }<nl>else {, these must be at the same
@@ -910,26 +1364,20 @@ sub process {
#warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
if ($tree && $rawline =~ m{^.\#\s*include\s*\<asm\/(.*)\.h\>}) {
- my $checkfile = "include/linux/$1.h";
- if (-f $checkfile) {
+ my $checkfile = "$root/include/linux/$1.h";
+ if (-f $checkfile && $1 ne 'irq.h') {
CHK("Use #include <linux/$1.h> instead of <asm/$1.h>\n" .
$herecurr);
}
}
-# if and else should not have general statements after it
- if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/ &&
- $1 !~ /^\s*(?:\sif|{|\\|$)/) {
- ERROR("trailing statements should be on next line\n" . $herecurr);
- }
-
# multi-statement macros should be enclosed in a do while loop, grab the
# first statement and ensure its the whole macro if its not enclosed
# in a known goot container
- if (($prevline=~/\#define.*\\/) and
- !($prevline=~/do\s+{/) and !($prevline=~/\(\{/) and
- !($line=~/do.*{/) and !($line=~/\(\{/) and
- !($line=~/^.\s*$Declare\s/)) {
+ 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.
@@ -945,6 +1393,10 @@ sub process {
$off = length($1);
$ln--;
$cnt++;
+ while ($lines[$ln - 1] =~ /^-/) {
+ $ln--;
+ $cnt++;
+ }
}
my @ctx = ctx_statement($ln, $cnt, $off);
my $ctx_ln = $ln + $#ctx + 1;
@@ -980,25 +1432,23 @@ sub process {
if ($lines[$nr - 1] =~ /{\s*$/) {
my ($lvl, @block) = ctx_block_level($nr, $cnt);
- my $stmt = join(' ', @block);
- $stmt =~ s/(^[^{]*){//;
+ my $stmt = join("\n", @block);
+ # Drop the diff line leader.
+ $stmt =~ s/\n./\n/g;
+ # Drop the code outside the block.
+ $stmt =~ s/(^[^{]*){\s*//;
my $before = $1;
- $stmt =~ s/}([^}]*$)//;
+ $stmt =~ s/\s*}([^}]*$)//;
my $after = $1;
#print "block<" . join(' ', @block) . "><" . scalar(@block) . ">\n";
#print "stmt<$stmt>\n\n";
- # Count the ;'s if there is fewer than two
- # then there can only be one statement,
- # if there is a brace inside we cannot
- # trivially detect if its one statement.
- # Also nested if's often require braces to
- # disambiguate the else binding so shhh there.
- my @semi = ($stmt =~ /;/g);
- push(@semi, "/**/") if ($stmt =~ m@/\*@);
- ##print "semi<" . scalar(@semi) . ">\n";
- if ($lvl == 0 && scalar(@semi) < 2 &&
+ # Count the newlines, if there is only one
+ # then the block should not have {}'s.
+ my @lines = ($stmt =~ /\n/g);
+ #print "lines<" . scalar(@lines) . ">\n";
+ if ($lvl == 0 && scalar(@lines) == 0 &&
$stmt !~ /{/ && $stmt !~ /\bif\b/ &&
$before !~ /}/ && $after !~ /{/) {
my $herectx = "$here\n" . join("\n", @control, @block[1 .. $#block]) . "\n";
@@ -1023,10 +1473,16 @@ sub process {
}
# no volatiles please
- if ($line =~ /\bvolatile\b/ && $line !~ /\basm\s+volatile\b/) {
+ 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" .
@@ -1073,11 +1529,16 @@ sub process {
# check the location of the inline attribute, that it is between
# storage class and type.
- if ($line =~ /$Type\s+(?:inline|__always_inline|noinline)\b/ ||
- $line =~ /\b(?:inline|__always_inline|noinline)\s+$Storage/) {
+ 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);
@@ -1091,18 +1552,40 @@ sub process {
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" . $herecurr);
+ }
}
- if ($chk_patch && !$is_patch) {
+ # In mailback mode only produce a report in the negative, for
+ # things that appear to be patches.
+ if ($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 && $signoff == 0) {
ERROR("Missing Signed-off-by: line(s)\n");
}
- if ($clean == 0 && ($chk_patch || $is_patch)) {
- print report_dump();
+ print report_dump();
+ if ($summary) {
+ 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 "Your patch has no obvious style problems and is ready for submission.\n"
}
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