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-rwxr-xr-xscripts/checkpatch.pl131
1 files changed, 90 insertions, 41 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 64ec4b8a51b5..fd21b5eaed3f 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -9,7 +9,7 @@ use strict;
my $P = $0;
$P =~ s@.*/@@g;
-my $V = '0.16';
+my $V = '0.17';
use Getopt::Long qw(:config no_auto_abbrev);
@@ -131,6 +131,17 @@ our $NonptrType;
our $Type;
our $Declare;
+our $UTF8 = qr {
+ [\x09\x0A\x0D\x20-\x7E] # ASCII
+ | [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
+ | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
+ | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
+ | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
+ | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
+ | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
+ | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
+}x;
+
our @typeList = (
qr{void},
qr{char},
@@ -692,7 +703,7 @@ sub annotate_values {
while (length($cur)) {
@av_paren_type = ('E') if ($#av_paren_type < 0);
print " <" . join('', @av_paren_type) .
- "> <$type> " if ($dbg_values > 1);
+ "> <$type> <$av_pending>" if ($dbg_values > 1);
if ($cur =~ /^(\s+)/o) {
print "WS($1)\n" if ($dbg_values > 1);
if ($1 =~ /\n/ && $av_preprocessor) {
@@ -705,9 +716,18 @@ sub annotate_values {
$type = 'T';
} elsif ($cur =~ /^(#\s*define\s*$Ident)(\(?)/o) {
- print "DEFINE($1)\n" if ($dbg_values > 1);
+ print "DEFINE($1,$2)\n" if ($dbg_values > 1);
$av_preprocessor = 1;
- $av_pending = 'N';
+ push(@av_paren_type, $type);
+ if ($2 ne '') {
+ $av_pending = 'N';
+ }
+ $type = 'E';
+
+ } elsif ($cur =~ /^(#\s*undef\s*$Ident)/o) {
+ print "UNDEF($1)\n" if ($dbg_values > 1);
+ $av_preprocessor = 1;
+ push(@av_paren_type, $type);
} elsif ($cur =~ /^(#\s*(?:ifdef|ifndef|if))/o) {
print "PRE_START($1)\n" if ($dbg_values > 1);
@@ -715,7 +735,7 @@ sub annotate_values {
push(@av_paren_type, $type);
push(@av_paren_type, $type);
- $type = 'N';
+ $type = 'E';
} elsif ($cur =~ /^(#\s*(?:else|elif))/o) {
print "PRE_RESTART($1)\n" if ($dbg_values > 1);
@@ -723,7 +743,7 @@ sub annotate_values {
push(@av_paren_type, $av_paren_type[$#av_paren_type]);
- $type = 'N';
+ $type = 'E';
} elsif ($cur =~ /^(#\s*(?:endif))/o) {
print "PRE_END($1)\n" if ($dbg_values > 1);
@@ -734,11 +754,16 @@ sub annotate_values {
# one does, and continue as if the #endif was not here.
pop(@av_paren_type);
push(@av_paren_type, $type);
- $type = 'N';
+ $type = 'E';
} elsif ($cur =~ /^(\\\n)/o) {
print "PRECONT($1)\n" if ($dbg_values > 1);
+ } elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
+ print "ATTR($1)\n" if ($dbg_values > 1);
+ $av_pending = $type;
+ $type = 'N';
+
} elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
print "SIZEOF($1)\n" if ($dbg_values > 1);
if (defined $2) {
@@ -930,7 +955,7 @@ sub process {
# 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++) {
+ for (my $ln = $linenr + 1; $ln < ($linenr + $realcnt); $ln++) {
next if ($line =~ /^-/);
($edge) = ($rawlines[$ln - 1] =~ m@(/\*|\*/)@);
last if (defined $edge);
@@ -951,9 +976,9 @@ sub process {
##print "COMMENT:$in_comment edge<$edge> $rawline\n";
sanitise_line_reset($in_comment);
- } elsif ($realcnt) {
+ } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
# Standardise the strings and chars within the input to
- # simplify matching.
+ # simplify matching -- only bother with positive lines.
$line = sanitise_line($rawline);
}
push(@lines, $line);
@@ -1066,17 +1091,14 @@ sub process {
# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
if (($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);
+ $rawline !~ m/^$UTF8*$/) {
+ my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
+
+ my $blank = copy_spacing($rawline);
+ my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
+ my $hereptr = "$hereline$ptr\n";
+
+ ERROR("Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
}
#ignore lines being removed
@@ -1112,7 +1134,7 @@ sub process {
if ($rawline =~ /^\+\s* \t\s*\S/ ||
$rawline =~ /^\+\s* \s*/) {
my $herevet = "$here\n" . cat_vet($rawline) . "\n";
- ERROR("use tabs not spaces\n" . $herevet);
+ ERROR("code indent should use tabs where possible\n" . $herevet);
}
# check for RCS/CVS revision markers
@@ -1121,35 +1143,40 @@ sub process {
}
# Check for potential 'bare' types
+ my ($stat, $cond);
if ($realcnt) {
- my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
- $s =~ s/\n./ /g;
- $s =~ s/{.*$//;
+ ($stat, $cond) = ctx_statement_block($linenr,
+ $realcnt, 0);
+ $stat =~ s/\n./\n /g;
+ $cond =~ s/\n./\n /g;
+
+ my $s = $stat;
+ $s =~ s/{.*$//s;
# Ignore goto labels.
- if ($s =~ /$Ident:\*$/) {
+ if ($s =~ /$Ident:\*$/s) {
# Ignore functions being called
- } elsif ($s =~ /^.\s*$Ident\s*\(/) {
+ } elsif ($s =~ /^.\s*$Ident\s*\(/s) {
# definitions in global scope can only start with types
- } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b/) {
+ } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b/s) {
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*$Ident\s*(?:;|=|,)/) {
+ } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:const\s+)?($Ident)\b(:?\s+$Sparse)?\s*\**\s*$Ident\s*(?:;|=|,)/s) {
possible($1, $s);
}
# any (foo ... *) is a pointer cast, and foo is a type
- while ($s =~ /\(($Ident)(?:\s+$Sparse)*\s*\*+\s*\)/g) {
+ while ($s =~ /\(($Ident)(?:\s+$Sparse)*\s*\*+\s*\)/sg) {
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*)\(/) {
+ if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
my ($name_len) = length($1);
my $ctx = $s;
@@ -1282,6 +1309,7 @@ sub process {
($prevline !~ /^ }/) &&
($prevline !~ /^.DECLARE_$Ident\(\Q$name\E\)/) &&
($prevline !~ /^.LIST_HEAD\(\Q$name\E\)/) &&
+ ($prevline !~ /^.$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(/) &&
($prevline !~ /\b\Q$name\E(?:\s+$Attribute)?\s*(?:;|=|\[)/)) {
WARN("EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
}
@@ -1512,7 +1540,10 @@ sub process {
if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
ERROR("space required before that '$op' $at\n" . $hereptr);
}
- if ($ctx =~ /.xW/) {
+ if ($op eq '*' && $cc =~/\s*const\b/) {
+ # A unary '*' may be const
+
+ } elsif ($ctx =~ /.xW/) {
ERROR("space prohibited after that '$op' $at\n" . $hereptr);
}
@@ -1617,7 +1648,7 @@ sub process {
# Check for illegal assignment in if conditional.
if ($line =~ /\bif\s*\(/) {
- my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
+ my ($s, $c) = ($stat, $cond);
if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/) {
ERROR("do not use assignment in if condition\n" . $herecurr);
@@ -1695,7 +1726,7 @@ sub process {
#warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
if ($tree && $rawline =~ m{^.\#\s*include\s*\<asm\/(.*)\.h\>}) {
my $checkfile = "$root/include/linux/$1.h";
- if (-f $checkfile && $1 ne 'irq.h') {
+ if (-f $checkfile && $1 ne 'irq') {
WARN("Use #include <linux/$1.h> instead of <asm/$1.h>\n" .
$herecurr);
}
@@ -1910,7 +1941,8 @@ sub process {
}
# check for spinlock_t definitions without a comment.
- if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/) {
+ if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ ||
+ $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
my $which = $1;
if (!ctx_has_comment($first_line, $linenr)) {
CHK("$1 definition without comment\n" . $herecurr);
@@ -1940,8 +1972,22 @@ sub process {
}
# check for new externs in .c files.
- if ($line =~ /^.\s*extern\s/ && ($realfile =~ /\.c$/)) {
- WARN("externs should be avoided in .c files\n" . $herecurr);
+ if ($realfile =~ /\.c$/ && defined $stat &&
+ $stat =~ /^.(?:extern\s+)?$Type\s+$Ident(\s*)\(/s)
+ {
+ my $paren_space = $1;
+
+ my $s = $stat;
+ if (defined $cond) {
+ substr($s, 0, length($cond), '');
+ }
+ if ($s =~ /^\s*;/) {
+ WARN("externs should be avoided in .c files\n" . $herecurr);
+ }
+
+ if ($paren_space =~ /\n/) {
+ WARN("arguments for function declarations should follow identifier\n" . $herecurr);
+ }
}
# checks for new __setup's
@@ -1964,11 +2010,11 @@ sub process {
}
# check for semaphores used as mutexes
- if ($line =~ /\b(DECLARE_MUTEX|init_MUTEX)\s*\(/) {
+ if ($line =~ /^.\s*(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*\(/) {
+ if ($line =~ /^.\s*init_MUTEX_LOCKED\s*\(/) {
WARN("consider using a completion\n" . $herecurr);
}
# recommend strict_strto* over simple_strto*
@@ -1979,8 +2025,11 @@ sub process {
# use of NR_CPUS is usually wrong
# ignore definitions of NR_CPUS and usage to define arrays as likely right
if ($line =~ /\bNR_CPUS\b/ &&
- $line !~ /^.#\s*define\s+NR_CPUS\s+/ &&
- $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/)
+ $line !~ /^.#\s*if\b.*\bNR_CPUS\b/ &&
+ $line !~ /^.#\s*define\b.*\bNR_CPUS\b/ &&
+ $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
+ $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
+ $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/)
{
WARN("usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
}
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