update checkpatch.pl to version 0.06
Update to checkpatch.pl v0.06. Of note:
- do { and else handled correctly as control structures for { matching
- trailing whitespace correctly tripped when line otherwise empty
- support for const, including const foo * const bar
- multiline macros defining values correctly reported
This version of checkpatch.pl can be found at the following URL:
http://www.kernel.org/pub/linux/kernel/people/apw/checkpatch/checkpatch.pl-0.06
Full Changelog:
Andy Whitcroft (14):
Version: 0.06
cleanup the Type regular expression declarations
fix up block counting
end of line counts as a space for ++ and --
do { needs the same checks as if, for et al
handle "const foo * const a" as a valid type
add spacing checks following ;
complete whitespace lines should trip trailing whitespace check
else is also a block control structure
badly formatted else can trip function declaration
detect and report trailing statements after else
types need to be terminated by a boundary
multiline macros defining values should be surrounded by parentheses
soften the wording of the Signed-off-by: warnings
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 56c364c..277c326 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -9,7 +9,7 @@
my $P = $0;
$P =~ s@.*/@@g;
-my $V = '0.05';
+my $V = '0.06';
use Getopt::Long qw(:config no_auto_abbrev);
@@ -271,24 +271,38 @@
my $in_comment = 0;
my $first_line = 0;
- my $ident = '[A-Za-z\d_]+';
- my $storage = '(?:extern|static)';
- my $sparse = '(?:__user|__kernel|__force|__iomem)';
- my $type = '(?:unsigned\s+)?' .
- '(?:void|char|short|int|long|unsigned|float|double|' .
- 'long\s+long|' .
- "struct\\s+${ident}|" .
- "union\\s+${ident}|" .
- "${ident}_t)" .
- "(?:\\s+$sparse)*" .
- '(?:\s*\*+)?';
- my $attribute = '(?:__read_mostly|__init|__initdata)';
-
- my $Ident = $ident;
- my $Type = $type;
- my $Storage = $storage;
- my $Declare = "(?:$storage\\s+)?$type";
- my $Attribute = $attribute;
+ my $Ident = qr{[A-Za-z\d_]+};
+ my $Storage = qr{extern|static};
+ my $Sparse = qr{__user|__kernel|__force|__iomem};
+ my $NonptrType = qr{
+ \b
+ (?:const\s+)?
+ (?:unsigned\s+)?
+ (?:
+ void|
+ char|
+ short|
+ int|
+ long|
+ unsigned|
+ float|
+ double|
+ long\s+int|
+ long\s+long|
+ long\s+long\s+int|
+ struct\s+$Ident|
+ union\s+$Ident|
+ ${Ident}_t
+ )
+ (?:\s+$Sparse)*
+ \b
+ }x;
+ my $Type = qr{
+ \b$NonptrType\b
+ (?:\s*\*+\s*const|\s*\*+)?
+ }x;
+ my $Declare = qr{(?:$Storage\s+)?$Type};
+ my $Attribute = qr{__read_mostly|__init|__initdata};
foreach my $line (@lines) {
$linenr++;
@@ -321,6 +335,7 @@
# blank context lines so we need to count that too.
if ($line =~ /^( |\+|$)/) {
$realline++;
+ $realcnt-- if ($realcnt != 0);
# track any sort of multi-line comment. Obviously if
# the added text or context do not include the whole
@@ -345,8 +360,9 @@
# Track the previous line.
($prevline, $stashline) = ($stashline, $line);
($previndent, $stashindent) = ($stashindent, $indent);
+ } elsif ($realcnt == 1) {
+ $realcnt--;
}
- $realcnt-- if ($realcnt != 0);
#make up the handle for any error we report on this line
$here = "#$linenr: ";
@@ -357,14 +373,11 @@
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) {
+ 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:/)) {
- print "use Signed-off-by:\n";
+ print "Signed-off-by: is the preferred form\n";
print "$herecurr";
$clean = 0;
}
@@ -389,7 +402,7 @@
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);
#trailing whitespace
- if ($line=~/^\+.*\S\s+$/) {
+ if ($line =~ /^\+.*\S\s+$/ || $line =~ /^\+\s+$/) {
my $herevet = "$here\n" . cat_vet($line) . "\n\n";
print "trailing whitespace\n";
print "$herevet";
@@ -525,26 +538,25 @@
}
# * goes on variable not on type
- if ($line =~ m{[A-Za-z\d_]+(\*+) [A-Za-z\d_]+}) {
- print "\"foo$1 bar\" should be \"foo $1bar\"\n";
- print "$herecurr";
- $clean = 0;
- }
- if ($line =~ m{$Type (\*) [A-Za-z\d_]+} ||
- $line =~ m{[A-Za-z\d_]+ (\*\*+) [A-Za-z\d_]+}) {
- print "\"foo $1 bar\" should be \"foo $1bar\"\n";
- print "$herecurr";
- $clean = 0;
- }
- if ($line =~ m{\([A-Za-z\d_\s]+[A-Za-z\d_](\*+)\)}) {
+ if ($line =~ m{\($NonptrType(\*+)(?:\s+const)?\)}) {
print "\"(foo$1)\" should be \"(foo $1)\"\n";
print "$herecurr";
$clean = 0;
- }
- if ($line =~ m{\([A-Za-z\d_\s]+[A-Za-z\d_]\s+(\*+)\s+\)}) {
+
+ } elsif ($line =~ m{\($NonptrType\s+(\*+)(?!\s+const)\s+\)}) {
print "\"(foo $1 )\" should be \"(foo $1)\"\n";
print "$herecurr";
$clean = 0;
+
+ } elsif ($line =~ m{$NonptrType(\*+)(?:\s+const)?\s+[A-Za-z\d_]+}) {
+ print "\"foo$1 bar\" should be \"foo $1bar\"\n";
+ print "$herecurr";
+ $clean = 0;
+
+ } elsif ($line =~ m{$NonptrType\s+(\*+)(?!\s+const)\s+[A-Za-z\d_]+}) {
+ print "\"foo $1 bar\" should be \"foo $1bar\"\n";
+ print "$herecurr";
+ $clean = 0;
}
# # no BUG() or BUG_ON()
@@ -581,7 +593,7 @@
# function brace can't be on same line, except for #defines of do while,
# or if closed on same line
- if (($line=~/[A-Za-z\d_]+\**\s+\**[A-Za-z\d_]+\(.*\).* {/) and
+ if (($line=~/$Type\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";
@@ -624,7 +636,7 @@
my $ca = substr($opline, $off - 1, 1);
my $cc = '';
if (length($opline) >= ($off + length($elements[$n + 1]))) {
- $cc = substr($opline, $off + length($elements[$n + 1]), 1);
+ $cc = substr($opline, $off + length($elements[$n + 1]));
}
my $ctx = "${a}x${c}";
@@ -636,8 +648,16 @@
##print "<$s1:$op:$s2> <$elements[$n]:$elements[$n + 1]:$elements[$n + 2]>\n";
- # We need ; as an operator. // is a comment.
- if ($op eq ';' or $op eq '//') {
+ # ; should have either the end of line or a space or \ after it
+ if ($op eq ';') {
+ if ($ctx !~ /.x[WE]/ && $cc !~ /^\\/) {
+ print "need space after that '$op' $at\n";
+ print "$hereptr";
+ $clean = 0;
+ }
+
+ # // is a comment
+ } elsif ($op eq '//') {
# -> should have no spaces
} elsif ($op eq '->') {
@@ -649,7 +669,7 @@
# , must have a space on the right.
} elsif ($op eq ',') {
- if ($ctx !~ /.xW|.xE/ && $cc ne '}') {
+ if ($ctx !~ /.xW|.xE/ && $cc !~ /^}/) {
print "need space after that '$op' $at\n";
print "$hereptr";
$clean = 0;
@@ -670,12 +690,12 @@
# unary ++ and unary -- are allowed no space on one side.
} elsif ($op eq '++' or $op eq '--') {
- if ($ctx !~ /[WOB]x[^W]/ && $ctx !~ /[^W]x[WOB]/) {
+ if ($ctx !~ /[WOB]x[^W]/ && $ctx !~ /[^W]x[WOBE]/) {
print "need space one side of that '$op' $at\n";
print "$hereptr";
$clean = 0;
}
- if ($ctx =~ /Wx./ && $cc eq ';') {
+ if ($ctx =~ /Wx./ && $cc =~ /^;/) {
print "no space before that '$op' $at\n";
print "$hereptr";
$clean = 0;
@@ -707,7 +727,7 @@
#
} elsif ($op eq '*') {
if ($ca eq '*') {
- if ($cc =~ /\s/) {
+ if ($cc =~ /^\s(?!\s*const)/) {
print "no space after that '$op' $at\n";
print "$hereptr";
$clean = 0;
@@ -803,7 +823,7 @@
# if/while/etc brace do not go on next line, unless defining a do while loop,
# or if that brace on the next line is for something else
- if ($prevline=~/\b(if|while|for|switch)\s*\(/) {
+ if ($prevline=~/\b(?:(if|while|for|switch)\s*\(|do\b|else\b)/) {
my @opened = $prevline=~/\(/g;
my @closed = $prevline=~/\)/g;
my $nr_line = $linenr;
@@ -823,14 +843,22 @@
@closed = $prevline=~/\)/g;
}
- if (($prevline=~/\b(if|while|for|switch)\s*\(.*\)\s*$/) and ($next_line=~/{/) and
- !($next_line=~/\b(if|while|for|switch)/) and !($next_line=~/\#define.*do.*while/)) {
+ if (($prevline=~/\b(?:(if|while|for|switch)\s*\(.*\)|do|else)\s*$/) and ($next_line=~/{/) and
+ !($next_line=~/\b(?:if|while|for|switch|do|else)\b/) and !($next_line=~/\#define.*do.*while/)) {
print "That { should be on the previous line\n";
print "$here\n$display_segment\n$next_line\n\n";
$clean = 0;
}
}
+# if and else should not have general statements after it
+ if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/ &&
+ $1 !~ /^\s*(?:\sif|{|$)/) {
+ print "trailing statements should be on next line\n";
+ print "$herecurr";
+ $clean = 0;
+ }
+
# multi-statement macros should be enclosed in a do while loop, grab the
# first statement and ensure its the whole macro if its not enclosed
# in a known goot container
@@ -841,11 +869,22 @@
# Grab the first statement, if that is the entire macro
# its ok. This may start either on the #define line
# or the one below.
- my $ctx1 = join('', ctx_statement($linenr - 1, $realcnt + 1));
- my $ctx2 = join('', ctx_statement($linenr, $realcnt));
+ my $ln = $linenr;
+ my $cnt = $realcnt;
- if ($ctx1 =~ /\\$/ && $ctx2 =~ /\\$/) {
- print "Macros with multiple statements should be enclosed in a do - while loop\n";
+ # If the macro starts on the define line start there.
+ if ($prevline !~ m{^.#\s*define\s*$Ident(?:\([^\)]*\))?\s*\\\s*$}) {
+ $ln--;
+ $cnt++;
+ }
+ my $ctx = join('', ctx_statement($ln, $cnt));
+
+ if ($ctx =~ /\\$/) {
+ if ($ctx =~ /;/) {
+ print "Macros with multiple statements should be enclosed in a do - while loop\n";
+ } else {
+ print "Macros with complex values should be enclosed in parenthesis\n";
+ }
print "$hereprev";
$clean = 0;
}
