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-rwxr-xr-xscripts/checkpatch.pl147
1 files changed, 121 insertions, 26 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f0bb6d60c07b..d12435992dea 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -278,6 +278,7 @@ our $Attribute = qr{
__noreturn|
__used|
__cold|
+ __pure|
__noclone|
__deprecated|
__read_mostly|
@@ -298,6 +299,7 @@ our $Binary = qr{(?i)0b[01]+$Int_type?};
our $Hex = qr{(?i)0x[0-9a-f]+$Int_type?};
our $Int = qr{[0-9]+$Int_type?};
our $Octal = qr{0[0-7]+$Int_type?};
+our $String = qr{"[X\t]*"};
our $Float_hex = qr{(?i)0x[0-9a-f]+p-?[0-9]+[fl]?};
our $Float_dec = qr{(?i)(?:[0-9]+\.[0-9]*|[0-9]*\.[0-9]+)(?:e-?[0-9]+)?[fl]?};
our $Float_int = qr{(?i)[0-9]+e-?[0-9]+[fl]?};
@@ -337,6 +339,11 @@ our $UTF8 = qr{
| $NON_ASCII_UTF8
}x;
+our $typeOtherOSTypedefs = qr{(?x:
+ u_(?:char|short|int|long) | # bsd
+ u(?:nchar|short|int|long) # sysv
+)};
+
our $typeTypedefs = qr{(?x:
(?:__)?(?:u|s|be|le)(?:8|16|32|64)|
atomic_t
@@ -473,6 +480,7 @@ sub build_types {
(?:$Modifier\s+|const\s+)*
(?:
(?:typeof|__typeof__)\s*\([^\)]*\)|
+ (?:$typeOtherOSTypedefs\b)|
(?:$typeTypedefs\b)|
(?:${all}\b)
)
@@ -490,6 +498,7 @@ sub build_types {
(?:
(?:typeof|__typeof__)\s*\([^\)]*\)|
(?:$typeTypedefs\b)|
+ (?:$typeOtherOSTypedefs\b)|
(?:${allWithAttr}\b)
)
(?:\s+$Modifier|\s+const)*
@@ -517,7 +526,7 @@ our $Typecast = qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*};
our $balanced_parens = qr/(\((?:[^\(\)]++|(?-1))*\))/;
our $LvalOrFunc = qr{((?:[\&\*]\s*)?$Lval)\s*($balanced_parens{0,1})\s*};
-our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant)};
+our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant|$String)};
our $declaration_macros = qr{(?x:
(?:$Storage\s+)?(?:[A-Z_][A-Z0-9]*_){0,2}(?:DEFINE|DECLARE)(?:_[A-Z0-9]+){1,2}\s*\(|
@@ -632,6 +641,8 @@ sub git_commit_info {
$output =~ s/^\s*//gm;
my @lines = split("\n", $output);
+ return ($id, $desc) if ($#lines < 0);
+
if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous\./) {
# Maybe one day convert this block of bash into something that returns
# all matching commit ids, but it's very slow...
@@ -2159,6 +2170,13 @@ sub process {
}
}
+# Check email subject for common tools that don't need to be mentioned
+ if ($in_header_lines &&
+ $line =~ /^Subject:.*\b(?:checkpatch|sparse|smatch)\b[^:]/i) {
+ WARN("EMAIL_SUBJECT",
+ "A patch subject line should describe the change not the tool that found it\n" . $herecurr);
+ }
+
# Check for old stable address
if ($line =~ /^\s*cc:\s*.*<?\bstable\@kernel\.org\b>?.*$/i) {
ERROR("STABLE_ADDRESS",
@@ -2171,21 +2189,49 @@ sub process {
"Remove Gerrit Change-Id's before submitting upstream.\n" . $herecurr);
}
-# Check for improperly formed commit descriptions
- if ($in_commit_log &&
- $line =~ /\bcommit\s+[0-9a-f]{5,}/i &&
- !($line =~ /\b[Cc]ommit [0-9a-f]{12,40} \("/ ||
- ($line =~ /\b[Cc]ommit [0-9a-f]{12,40}\s*$/ &&
- defined $rawlines[$linenr] &&
- $rawlines[$linenr] =~ /^\s*\("/))) {
- $line =~ /\b(c)ommit\s+([0-9a-f]{5,})/i;
+# Check for git id commit length and improperly formed commit descriptions
+ if ($in_commit_log && $line =~ /\b(c)ommit\s+([0-9a-f]{5,})/i) {
my $init_char = $1;
my $orig_commit = lc($2);
- my $id = '01234567890ab';
- my $desc = 'commit description';
- ($id, $desc) = git_commit_info($orig_commit, $id, $desc);
- ERROR("GIT_COMMIT_ID",
- "Please use 12 or more chars for the git commit ID like: '${init_char}ommit $id (\"$desc\")'\n" . $herecurr);
+ my $short = 1;
+ my $long = 0;
+ my $case = 1;
+ my $space = 1;
+ my $hasdesc = 0;
+ my $hasparens = 0;
+ my $id = '0123456789ab';
+ my $orig_desc = "commit description";
+ my $description = "";
+
+ $short = 0 if ($line =~ /\bcommit\s+[0-9a-f]{12,40}/i);
+ $long = 1 if ($line =~ /\bcommit\s+[0-9a-f]{41,}/i);
+ $space = 0 if ($line =~ /\bcommit [0-9a-f]/i);
+ $case = 0 if ($line =~ /\b[Cc]ommit\s+[0-9a-f]{5,40}[^A-F]/);
+ if ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)"\)/i) {
+ $orig_desc = $1;
+ $hasparens = 1;
+ } elsif ($line =~ /\bcommit\s+[0-9a-f]{5,}\s*$/i &&
+ defined $rawlines[$linenr] &&
+ $rawlines[$linenr] =~ /^\s*\("([^"]+)"\)/) {
+ $orig_desc = $1;
+ $hasparens = 1;
+ } elsif ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("[^"]+$/i &&
+ defined $rawlines[$linenr] &&
+ $rawlines[$linenr] =~ /^\s*[^"]+"\)/) {
+ $line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)$/i;
+ $orig_desc = $1;
+ $rawlines[$linenr] =~ /^\s*([^"]+)"\)/;
+ $orig_desc .= " " . $1;
+ $hasparens = 1;
+ }
+
+ ($id, $description) = git_commit_info($orig_commit,
+ $id, $orig_desc);
+
+ if ($short || $long || $space || $case || ($orig_desc ne $description) || !$hasparens) {
+ ERROR("GIT_COMMIT_ID",
+ "Please use git commit description style 'commit <12+ chars of sha1> (\"<title line>\")' - ie: '${init_char}ommit $id (\"$description\")'\n" . $herecurr);
+ }
}
# Check for added, moved or deleted files
@@ -2355,6 +2401,13 @@ sub process {
"Use of CONFIG_EXPERIMENTAL is deprecated. For alternatives, see https://lkml.org/lkml/2012/10/23/580\n");
}
+# discourage the use of boolean for type definition attributes of Kconfig options
+ if ($realfile =~ /Kconfig/ &&
+ $line =~ /^\+\s*\bboolean\b/) {
+ WARN("CONFIG_TYPE_BOOLEAN",
+ "Use of boolean is deprecated, please use bool instead.\n" . $herecurr);
+ }
+
if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) &&
($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) {
my $flag = $1;
@@ -2499,7 +2552,7 @@ sub process {
}
}
- if ($line =~ /^\+.*(\w+\s*)?\(\s*$Type\s*\)[ \t]+(?!$Assignment|$Arithmetic|[,;\({\[\<\>])/ &&
+ if ($line =~ /^\+.*(\w+\s*)?\(\s*$Type\s*\)[ \t]+(?!$Assignment|$Arithmetic|[,;:\?\(\{\}\[\<\>]|&&|\|\||\\$)/ &&
(!defined($1) || $1 !~ /sizeof\s*/)) {
if (CHK("SPACING",
"No space is necessary after a cast\n" . $herecurr) &&
@@ -3124,6 +3177,7 @@ sub process {
$line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
$line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
$line !~ /\b$typeTypedefs\b/ &&
+ $line !~ /\b$typeOtherOSTypedefs\b/ &&
$line !~ /\b__bitwise(?:__|)\b/) {
WARN("NEW_TYPEDEFS",
"do not add new typedefs\n" . $herecurr);
@@ -3200,7 +3254,7 @@ sub process {
# check for uses of printk_ratelimit
if ($line =~ /\bprintk_ratelimit\s*\(/) {
WARN("PRINTK_RATELIMITED",
-"Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
+ "Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
}
# printk should use KERN_* levels. Note that follow on printk's on the
@@ -3646,7 +3700,22 @@ sub process {
$op eq '*' or $op eq '/' or
$op eq '%')
{
- if ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
+ if ($check) {
+ if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) {
+ if (CHK("SPACING",
+ "spaces preferred around that '$op' $at\n" . $hereptr)) {
+ $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
+ $fix_elements[$n + 2] =~ s/^\s+//;
+ $line_fixed = 1;
+ }
+ } elsif (!defined $fix_elements[$n + 2] && $ctx !~ /Wx[OE]/) {
+ if (CHK("SPACING",
+ "space preferred before that '$op' $at\n" . $hereptr)) {
+ $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]);
+ $line_fixed = 1;
+ }
+ }
+ } elsif ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
if (ERROR("SPACING",
"need consistent spacing around '$op' $at\n" . $hereptr)) {
$good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
@@ -4251,6 +4320,7 @@ sub process {
$ctx = $dstat;
$dstat =~ s/\\\n.//g;
+ $dstat =~ s/$;/ /g;
if ($dstat =~ /^\+\s*#\s*define\s+$Ident\s*${balanced_parens}\s*do\s*{(.*)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) {
my $stmts = $2;
@@ -4417,12 +4487,18 @@ sub process {
# check for unnecessary blank lines around braces
if (($line =~ /^.\s*}\s*$/ && $prevrawline =~ /^.\s*$/)) {
- CHK("BRACES",
- "Blank lines aren't necessary before a close brace '}'\n" . $hereprev);
+ if (CHK("BRACES",
+ "Blank lines aren't necessary before a close brace '}'\n" . $hereprev) &&
+ $fix && $prevrawline =~ /^\+/) {
+ fix_delete_line($fixlinenr - 1, $prevrawline);
+ }
}
if (($rawline =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) {
- CHK("BRACES",
- "Blank lines aren't necessary after an open brace '{'\n" . $hereprev);
+ if (CHK("BRACES",
+ "Blank lines aren't necessary after an open brace '{'\n" . $hereprev) &&
+ $fix) {
+ fix_delete_line($fixlinenr, $rawline);
+ }
}
# no volatiles please
@@ -4545,7 +4621,7 @@ sub process {
}
# check for logging functions with KERN_<LEVEL>
- if ($line !~ /printk\s*\(/ &&
+ if ($line !~ /printk(?:_ratelimited|_once)?\s*\(/ &&
$line =~ /\b$logFunctions\s*\(.*\b(KERN_[A-Z]+)\b/) {
my $level = $1;
if (WARN("UNNECESSARY_KERN_LEVEL",
@@ -4804,7 +4880,8 @@ sub process {
# check for seq_printf uses that could be seq_puts
if ($sline =~ /\bseq_printf\s*\(.*"\s*\)\s*;\s*$/) {
my $fmt = get_quoted_string($line, $rawline);
- if ($fmt ne "" && $fmt !~ /[^\\]\%/) {
+ $fmt =~ s/%%//g;
+ if ($fmt !~ /%/) {
if (WARN("PREFER_SEQ_PUTS",
"Prefer seq_puts to seq_printf\n" . $herecurr) &&
$fix) {
@@ -5089,6 +5166,12 @@ sub process {
}
}
+# check for uses of __DATE__, __TIME__, __TIMESTAMP__
+ while ($line =~ /\b(__(?:DATE|TIME|TIMESTAMP)__)\b/g) {
+ ERROR("DATE_TIME",
+ "Use of the '$1' macro makes the build non-deterministic\n" . $herecurr);
+ }
+
# check for use of yield()
if ($line =~ /\byield\s*\(\s*\)/) {
WARN("YIELD",
@@ -5140,8 +5223,9 @@ sub process {
"please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr);
}
-# check for various ops structs, ensure they are const.
- my $struct_ops = qr{acpi_dock_ops|
+# check for various structs that are normally const (ops, kgdb, device_tree)
+ my $const_structs = qr{
+ acpi_dock_ops|
address_space_operations|
backlight_ops|
block_device_operations|
@@ -5164,6 +5248,7 @@ sub process {
mtrr_ops|
neigh_ops|
nlmsvc_binding|
+ of_device_id|
pci_raw_ops|
pipe_buf_operations|
platform_hibernation_ops|
@@ -5179,7 +5264,7 @@ sub process {
usb_mon_operations|
wd_ops}x;
if ($line !~ /\bconst\b/ &&
- $line =~ /\bstruct\s+($struct_ops)\b/) {
+ $line =~ /\bstruct\s+($const_structs)\b/) {
WARN("CONST_STRUCT",
"struct $1 should normally be const\n" .
$herecurr);
@@ -5204,6 +5289,13 @@ sub process {
"#define of '$1' is wrong - use Kconfig variables or standard guards instead\n" . $herecurr);
}
+# likely/unlikely comparisons similar to "(likely(foo) > 0)"
+ if ($^V && $^V ge 5.10.0 &&
+ $line =~ /\b((?:un)?likely)\s*\(\s*$FuncArg\s*\)\s*$Compare/) {
+ WARN("LIKELY_MISUSE",
+ "Using $1 should generally have parentheses around the comparison\n" . $herecurr);
+ }
+
# whine mightly about in_atomic
if ($line =~ /\bin_atomic\s*\(/) {
if ($realfile =~ m@^drivers/@) {
@@ -5255,6 +5347,9 @@ sub process {
length($val) ne 4)) {
ERROR("NON_OCTAL_PERMISSIONS",
"Use 4 digit octal (0777) not decimal permissions\n" . $herecurr);
+ } elsif ($val =~ /^$Octal$/ && (oct($val) & 02)) {
+ ERROR("EXPORTED_WORLD_WRITABLE",
+ "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
}
}
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.