kernel_optimize_test/scripts/checkpatch.pl
Andy Whitcroft 00df344fd0 update checkpatch.pl to version 0.04
This version brings a some new tests, and a host of changes to fix
false positives, of particular note:

  - check for and report #if 0
  - extend checking of line lengths and spacing for .pl, .sh etc
  - extends the pointer type checks to multiple levels
  - updates printk handling to track newlines
  - adds a wrapped patch detector
  - drops the leading component of the filenames
  - extends switch indent handling to switch statmentes rooted in
    the context
  - adds foo * bar single pointer checks

This version of checkpatch.pl can be found at the following URL:

      http://www.shadowen.org/~apw/public/checkpatch/checkpatch.pl-0.04

Full Changelog:

Andy Whitcroft (16):
      allow checking line lengths and spacing on other source files
      clean up that whitespace
      sanitise the input line standardising the content of quotes
      clean up pointer type * and space checks
      fix up the sanitiser so it maintains the line length
      apply the printk facility checks only to the first printk in a set
      switch/case indent checks may anchor in the context
      add a wrapped patch detector
      put the #ifdef in C file checks on ice
      asm volatile is acceptable
      check for and report #if 0
      drop the leading component of the filename as patches are -p1
      use the original line when reporting operator errors
      correct spelling of Joel's name
      Version: 0.04
      add support for struct foo * bar checks

Geert Uytterhoeven (1):
      Fix checkpatch.pl name in usage template

Randy Dunlap (1):
      checkpatch: produce fewer lines of output

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-08 17:23:34 -07:00

869 lines
22 KiB
Perl
Executable File

#!/usr/bin/perl -w
# (c) 2001, Dave Jones. <davej@codemonkey.org.uk> (the file handling bit)
# (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
# (c) 2007, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite, etc)
# Licensed under the terms of the GNU GPL License version 2
use strict;
my $P = $0;
$P =~ s@.*/@@g;
my $V = '0.04';
use Getopt::Long qw(:config no_auto_abbrev);
my $quiet = 0;
my $tree = 1;
my $chk_signoff = 1;
my $chk_patch = 1;
GetOptions(
'q|quiet' => \$quiet,
'tree!' => \$tree,
'signoff!' => \$chk_signoff,
'patch!' => \$chk_patch,
) or exit;
my $exit = 0;
if ($#ARGV < 0) {
print "usage: $P [options] patchfile\n";
print "version: $V\n";
print "options: -q => quiet\n";
print " --no-tree => run without a kernel tree\n";
exit(1);
}
if ($tree && !top_of_kernel_tree()) {
print "Must be run from the top-level dir. of a kernel tree\n";
exit(2);
}
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";
while (<REMOVE>) {
if (/^Files:\s+(.*\S)/) {
for my $file (split(/[, ]+/, $1)) {
if ($file =~ m@include/(.*)@) {
push(@dep_includes, $1);
}
}
} elsif (/^Funcs:\s+(.*\S)/) {
for my $func (split(/[, ]+/, $1)) {
push(@dep_functions, $func);
}
}
}
}
my @rawlines = ();
while (<>) {
chomp;
push(@rawlines, $_);
if (eof(ARGV)) {
if (!process($ARGV, @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;
}
return 0;
}
sub expand_tabs {
my ($str) = @_;
my $res = '';
my $n = 0;
for my $c (split(//, $str)) {
if ($c eq "\t") {
$res .= ' ';
$n++;
for (; ($n % 8) != 0; $n++) {
$res .= ' ';
}
next;
}
$res .= $c;
$n++;
}
return $res;
}
sub line_stats {
my ($line) = @_;
# Drop the diff line leader and expand tabs
$line =~ s/^.//;
$line = expand_tabs($line);
# Pick the indent from the front of the line.
my ($white) = ($line =~ /^(\s*)/);
return (length($line), length($white));
}
sub sanitise_line {
my ($line) = @_;
my $res = '';
my $l = '';
my $quote = '';
foreach my $c (split(//, $line)) {
if ($l ne "\\" && ($c eq "'" || $c eq '"')) {
if ($quote eq '') {
$quote = $c;
$res .= $c;
$l = $c;
next;
} elsif ($quote eq $c) {
$quote = '';
}
}
if ($quote && $c ne "\t") {
$res .= "X";
} else {
$res .= $c;
}
$l = $c;
}
return $res;
}
sub ctx_block_get {
my ($linenr, $remain, $outer) = @_;
my $line;
my $start = $linenr - 1;
my $blk = '';
my @o;
my @c;
my @res = ();
for ($line = $start; $remain > 0; $line++) {
next if ($rawlines[$line] =~ /^-/);
$remain--;
$blk .= $rawlines[$line];
@o = ($blk =~ /\{/g);
@c = ($blk =~ /\}/g);
if (!$outer || (scalar(@o) - scalar(@c)) == 1) {
push(@res, $rawlines[$line]);
}
last if (scalar(@o) == scalar(@c));
}
return @res;
}
sub ctx_block_outer {
my ($linenr, $remain) = @_;
return ctx_block_get($linenr, $remain, 1);
}
sub ctx_block {
my ($linenr, $remain) = @_;
return ctx_block_get($linenr, $remain, 0);
}
sub ctx_locate_comment {
my ($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) = @_;
$vet =~ s/\t/^I/;
$vet =~ s/$/\$/;
return $vet;
}
sub process {
my $filename = shift;
my @lines = @_;
my $linenr=0;
my $prevline="";
my $stashline="";
my $length;
my $indent;
my $previndent=0;
my $stashindent=0;
my $clean = 1;
my $signoff = 0;
my $is_patch = 0;
# Trace the real file/line as we go.
my $realfile = '';
my $realline = 0;
my $realcnt = 0;
my $here = '';
my $in_comment = 0;
my $first_line = 0;
foreach my $line (@lines) {
$linenr++;
#extract the filename as it passes
if ($line=~/^\+\+\+\s+(\S+)/) {
$realfile=$1;
$realfile =~ s@^[^/]*/@@;
$in_comment = 0;
next;
}
#extract the line range in the file after the patch is applied
if ($line=~/^\@\@ -\d+,\d+ \+(\d+)(,(\d+))? \@\@/) {
$is_patch = 1;
$first_line = $linenr + 1;
$in_comment = 0;
$realline=$1-1;
if (defined $2) {
$realcnt=$3+1;
} else {
$realcnt=1+1;
}
next;
}
# track the line number as we move through the hunk, note that
# new versions of GNU diff omit the leading space on completely
# blank context lines so we need to count that too.
if ($line =~ /^( |\+|$)/) {
$realline++;
# track any sort of multi-line comment. Obviously if
# the added text or context do not include the whole
# comment we will not see it. Such is life.
#
# Guestimate if this is a continuing comment. If this
# is the start of a diff block and this line starts
# ' *' then it is very likely a comment.
if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
$in_comment = 1;
}
if ($line =~ m@/\*@) {
$in_comment = 1;
}
if ($line =~ m@\*/@) {
$in_comment = 0;
}
# Measure the line length and indent.
($length, $indent) = line_stats($line);
# Track the previous line.
($prevline, $stashline) = ($stashline, $line);
($previndent, $stashindent) = ($stashindent, $indent);
}
$realcnt-- if ($realcnt != 0);
#make up the handle for any error we report on this line
$here = "#$linenr: ";
$here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
my $hereline = "$here\n$line\n";
my $herecurr = "$here\n$line\n\n";
my $hereprev = "$here\n$prevline\n$line\n\n";
#check the patch for a signoff:
if ($line =~ /^\s*Signed-off-by:\s/) {
$signoff++;
} elsif ($line =~ /^\s*signed-off-by:/i) {
# This is a signoff, if ugly, so do not double report.
$signoff++;
if (!($line =~ /^\s*Signed-off-by:/)) {
print "use Signed-off-by:\n";
print "$herecurr";
$clean = 0;
}
if ($line =~ /^\s*signed-off-by:\S/i) {
print "need space after Signed-off-by:\n";
print "$herecurr";
$clean = 0;
}
}
# Check for wrappage within a valid hunk of the file
if ($realcnt != 0 && $line !~ m{^(?:\+|-| |$)}) {
print "patch seems to be corrupt (line wrapped?) [$realcnt]\n";
print "$herecurr";
$clean = 0;
}
#ignore lines being removed
if ($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 ($line=~/\+.*\S\s+$/) {
my $herevet = "$here\n" . cat_vet($line) . "\n\n";
print "trailing whitespace\n";
print "$herevet";
$clean = 0;
}
#80 column limit
if ($line =~ /^\+/ && !($prevline=~/\/\*\*/) && $length > 80) {
print "line over 80 characters\n";
print "$herecurr";
$clean = 0;
}
# check we are in a valid source file *.[hc] if not then ignore this hunk
next if ($realfile !~ /\.[hc]$/);
# at the beginning of a line any tabs must come first and anything
# more than 8 must use tabs.
if ($line=~/^\+\s* \t\s*\S/ or $line=~/^\+\s* \s*/) {
my $herevet = "$here\n" . cat_vet($line) . "\n\n";
print "use tabs not spaces\n";
print "$herevet";
$clean = 0;
}
#
# The rest of our checks refer specifically to C style
# only apply those _outside_ comments.
#
next if ($in_comment);
# Remove comments from the line before processing.
$line =~ s@/\*.*\*/@@g;
$line =~ s@/\*.*@@;
$line =~ s@.*\*/@@;
#
# Checks which may be anchored in the context.
#
# Check for switch () and associated case and default
# statements should be at the same indent.
if ($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 '') {
print "switch and case should be at the same indent\n";
print "$here\n$line\n$err\n";
$clean = 0;
}
}
#ignore lines not being added
if ($line=~/^[^\+]/) {next;}
#
# Checks which are anchored on the added line.
#
# no C99 // comments
if ($line =~ m{//}) {
print "do not use C99 // comments\n";
print "$herecurr";
$clean = 0;
}
# Remove C99 comments.
$line =~ s@//.*@@;
# Standardise the strings and chars within the input
# to simplify matching.
$line = sanitise_line($line);
#EXPORT_SYMBOL should immediately follow its function closing }.
if (($line =~ /EXPORT_SYMBOL.*\(.*\)/) ||
($line =~ /EXPORT_UNUSED_SYMBOL.*\(.*\)/)) {
if (($prevline !~ /^}/) &&
($prevline !~ /^\+}/) &&
($prevline !~ /^ }/)) {
print "EXPORT_SYMBOL(func); should immediately follow its function\n";
print "$herecurr";
$clean = 0;
}
}
# check for static initialisers.
if ($line=~/\s*static\s.*=\s+(0|NULL);/) {
print "do not initialise statics to 0 or NULL\n";
print "$herecurr";
$clean = 0;
}
# check for new typedefs.
if ($line=~/\s*typedef\s/) {
print "do not add new typedefs\n";
print "$herecurr";
$clean = 0;
}
# * goes on variable not on type
my $type = '(?:char|short|int|long|unsigned|float|double|' .
'struct\s+[A-Za-z\d_]+|' .
'union\s+[A-Za-z\d_]+)';
if ($line =~ m{[A-Za-z\d_]+(\*+) [A-Za-z\d_]+}) {
print "\"foo$1 bar\" should be \"foo $1bar\"\n";
print "$herecurr";
$clean = 0;
}
if ($line =~ m{$type (\*) [A-Za-z\d_]+} ||
$line =~ m{[A-Za-z\d_]+ (\*\*+) [A-Za-z\d_]+}) {
print "\"foo $1 bar\" should be \"foo $1bar\"\n";
print "$herecurr";
$clean = 0;
}
if ($line =~ m{\([A-Za-z\d_\s]+[A-Za-z\d_](\*+)\)}) {
print "\"(foo$1)\" should be \"(foo $1)\"\n";
print "$herecurr";
$clean = 0;
}
if ($line =~ m{\([A-Za-z\d_\s]+[A-Za-z\d_]\s+(\*+)\s+\)}) {
print "\"(foo $1 )\" should be \"(foo $1)\"\n";
print "$herecurr";
$clean = 0;
}
# # no BUG() or BUG_ON()
# if ($line =~ /\b(BUG|BUG_ON)\b/) {
# print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
# print "$herecurr";
# $clean = 0;
# }
# printk should use KERN_* levels. Note that follow on printk's on the
# same line do not need a level, so we use the current block context
# to try and find and validate the current printk. In summary the current
# printk includes all preceeding printk's which have no newline on the end.
# we assume the first bad printk is the one to report.
if ($line =~ /\bprintk\((?!KERN_)/) {
my $ok = 0;
for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
#print "CHECK<$lines[$ln - 1]\n";
# we have a preceeding printk if it ends
# with "\n" ignore it, else it is to blame
if ($lines[$ln - 1] =~ m{\bprintk\(}) {
if ($rawlines[$ln - 1] !~ m{\\n"}) {
$ok = 1;
}
last;
}
}
if ($ok == 0) {
print "printk() should include KERN_ facility level\n";
print "$herecurr";
$clean = 0;
}
}
#function brace can't be on same line, except for #defines of do while, or if closed on same line
if (($line=~/[A-Za-z\d_]+\**\s+\**[A-Za-z\d_]+\(.*\).* {/) and
!($line=~/\#define.*do\s{/) and !($line=~/}/)) {
print "braces following function declarations go on the next line\n";
print "$herecurr";
$clean = 0;
}
# 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/)) {
# Check operator spacing.
my @elements = split(/(<<=|>>=|<=|>=|==|!=|\+=|-=|\*=|\/=|%=|\^=|\|=|&=|->|<<|>>|<|>|=|!|~|&&|\|\||,|\^|\+\+|--|;|&|\||\+|-|\*|\/\/|\/)/, $opline);
my $off = 0;
for (my $n = 0; $n < $#elements; $n += 2) {
$off += length($elements[$n]);
my $a = '';
$a = 'V' if ($elements[$n] ne '');
$a = 'W' if ($elements[$n] =~ /\s$/);
$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
$a = 'O' if ($elements[$n] eq '');
$a = 'E' if ($elements[$n] eq '' && $n == 0);
my $op = $elements[$n + 1];
my $c = '';
if (defined $elements[$n + 2]) {
$c = 'V' if ($elements[$n + 2] ne '');
$c = 'W' if ($elements[$n + 2] =~ /^\s/);
$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
$c = 'O' if ($elements[$n + 2] eq '');
} else {
$c = 'E';
}
# Pick up the preceeding and succeeding characters.
my $ca = substr($opline, $off - 1, 1);
my $cc = '';
if (length($opline) > ($off + length($elements[$n]))) {
$cc = substr($opline, $off + 1 + length($elements[$n]), 1);
}
my $ctx = "${a}x${c}";
my $at = "(ctx:$ctx)";
my $ptr = (" " x $off) . "^";
my $hereptr = "$hereline$ptr\n\n";
##print "<$s1:$op:$s2> <$elements[$n]:$elements[$n + 1]:$elements[$n + 2]>\n";
# We need ; as an operator. // is a comment.
if ($op eq ';' or $op eq '//') {
# -> should have no spaces
} elsif ($op eq '->') {
if ($ctx =~ /Wx.|.xW/) {
print "no spaces around that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
# , must have a space on the right.
} elsif ($op eq ',') {
if ($ctx !~ /.xW|.xE/) {
print "need space after that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
# unary ! and unary ~ are allowed no space on the right
} elsif ($op eq '!' or $op eq '~') {
if ($ctx !~ /[WOEB]x./) {
print "need space before that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
if ($ctx =~ /.xW/) {
print "no space after that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
# unary ++ and unary -- are allowed no space on one side.
} elsif ($op eq '++' or $op eq '--') {
if ($ctx !~ /[WOB]x[^W]|[^W]x[WOB]/) {
print "need space one side of that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
# & is both unary and binary
# unary:
# a &b
# binary (consistent spacing):
# a&b OK
# a & b OK
#
# boiling down to: if there is a space on the right then there
# should be one on the left.
#
# - is the same
#
} elsif ($op eq '&' or $op eq '-') {
if ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]/) {
print "need space before that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
# * is the same as & only adding:
# type:
# (foo *)
# (foo **)
#
} elsif ($op eq '*') {
if ($ca eq '*') {
if ($cc =~ /\s/) {
print "no space after that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
} elsif ($ctx !~ /VxV|[EW]x[WE]|[EWB]x[VO]|OxV|WxB/) {
print "need space before that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
# << and >> may either have or not have spaces both sides
} elsif ($op eq '<<' or $op eq '>>' or $op eq '+' or $op eq '/' or
$op eq '^' or $op eq '|')
{
if ($ctx !~ /VxV|WxW|VxE|WxE/) {
print "need consistent spacing around '$op' $at\n";
print "$hereptr";
$clean = 0;
}
# All the others need spaces both sides.
} elsif ($ctx !~ /[EW]x[WE]/) {
print "need spaces around that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
$off += length($elements[$n + 1]);
}
}
#need space before brace following if, while, etc
if ($line=~/\(.*\){/) {
print "need a space before the brace\n";
print "$herecurr";
$clean = 0;
}
#goto labels aren't indented, allow a single space however
if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
!($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
print "labels should not be indented\n";
print "$herecurr";
$clean = 0;
}
# Need a space before open parenthesis after if, while etc
if ($line=~/\b(if|while|for|switch)\(/) {
print "need a space before the open parenthesis\n";
print "$herecurr";
$clean = 0;
}
# Check for illegal assignment in if conditional.
if ($line=~/\b(if|while)\s*\(.*[^<>!=]=[^=].*\)/) {
#next if ($line=~/\".*\Q$op\E.*\"/ or $line=~/\'\Q$op\E\'/);
print "do not use assignment in condition\n";
print "$herecurr";
$clean = 0;
}
# Check for }<nl>else {, these must be at the same
# indent level to be relevant to each other.
if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
$previndent == $indent) {
print "else should follow close brace\n";
print "$hereprev";
$clean = 0;
}
#studly caps, commented out until figure out how to distinguish between use of existing and adding new
# if (($line=~/[\w_][a-z\d]+[A-Z]/) and !($line=~/print/)) {
# print "No studly caps, use _\n";
# print "$herecurr";
# $clean = 0;
# }
#no spaces allowed after \ in define
if ($line=~/\#define.*\\\s$/) {
print("Whitepspace after \\ makes next lines useless\n");
print "$herecurr";
$clean = 0;
}
#warn if <asm/foo.h> is #included and <linux/foo.h> is available.
if ($tree && $line =~ qr|\s*\#\s*include\s*\<asm\/(.*)\.h\>|) {
my $checkfile = "include/linux/$1.h";
if (-f $checkfile) {
print "Use #include <linux/$1.h> instead of <asm/$1.h>\n";
print $herecurr;
$clean = 0;
}
}
#if/while/etc brace do not go on next line, unless #defining a do while loop, or if that brace on the next line is for something else
if ($prevline=~/\b(if|while|for|switch)\s*\(/) {
my @opened = $prevline=~/\(/g;
my @closed = $prevline=~/\)/g;
my $nr_line = $linenr;
my $remaining = $realcnt - 1;
my $next_line = $line;
my $extra_lines = 0;
my $display_segment = $prevline;
while ($remaining > 0 && scalar @opened > scalar @closed) {
$prevline .= $next_line;
$display_segment .= "\n" . $next_line;
$next_line = $lines[$nr_line];
$nr_line++;
$remaining--;
@opened = $prevline=~/\(/g;
@closed = $prevline=~/\)/g;
}
if (($prevline=~/\b(if|while|for|switch)\s*\(.*\)\s*$/) and ($next_line=~/{/) and
!($next_line=~/\b(if|while|for)/) and !($next_line=~/\#define.*do.*while/)) {
print "That { should be on the previous line\n";
print "$here\n$display_segment\n$next_line\n\n";
$clean = 0;
}
}
#multiline macros should be enclosed in a do while loop
if (($prevline=~/\#define.*\\/) and !($prevline=~/do\s+{/) and
!($prevline=~/\(\{/) and ($line=~/;\s*\\/) and
!($line=~/do.*{/) and !($line=~/\(\{/)) {
print "Macros with multiple statements should be enclosed in a do - while loop\n";
print "$hereprev";
$clean = 0;
}
# don't include deprecated include files
for my $inc (@dep_includes) {
if ($line =~ m@\#\s*include\s*\<$inc>@) {
print "Don't use <$inc>: see Documentation/feature-removal-schedule.txt\n";
print "$herecurr";
$clean = 0;
}
}
# don't use deprecated functions
for my $func (@dep_functions) {
if ($line =~ /\b$func\b/) {
print "Don't use $func(): see Documentation/feature-removal-schedule.txt\n";
print "$herecurr";
$clean = 0;
}
}
# no volatiles please
if ($line =~ /\bvolatile\b/ && $line !~ /\basm\s+volatile\b/) {
print "Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n";
print "$herecurr";
$clean = 0;
}
# warn about #if 0
if ($line =~ /^.#\s*if\s+0\b/) {
print "#if 0 -- if this code redundant remove it\n";
print "$herecurr";
$clean = 0;
}
# warn about #ifdefs in C files
# if ($line =~ /^.#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
# print "#ifdef in C files should be avoided\n";
# print "$herecurr";
# $clean = 0;
# }
# check for spinlock_t definitions without a comment.
if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/) {
my $which = $1;
if (!ctx_has_comment($first_line, $linenr)) {
print "$1 definition without comment\n";
print "$herecurr";
$clean = 0;
}
}
# check for memory barriers without a comment.
if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
if (!ctx_has_comment($first_line, $linenr)) {
print "memory barrier without comment\n";
print "$herecurr";
$clean = 0;
}
}
# check of hardware specific defines
if ($line =~ m@^.#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@) {
print "architecture specific defines should be avoided\n";
print "$herecurr";
$clean = 0;
}
}
if ($chk_patch && !$is_patch) {
$clean = 0;
print "Does not appear to be a unified-diff format patch\n";
}
if ($is_patch && $chk_signoff && $signoff == 0) {
$clean = 0;
print "Missing Signed-off-by: line(s)\n";
}
if ($clean == 1 && $quiet == 0) {
print "Your patch has no obvious style problems and is ready for submission.\n"
}
if ($clean == 0 && $quiet == 0) {
print "Your patch has style problems, please review. If any of these errors\n";
print "are false positives report them to the maintainer, see\n";
print "CHECKPATCH in MAINTAINERS.\n";
}
return $clean;
}