diff options
| -rwxr-xr-x | scripts/checkpatch.pl | 228 |
1 files changed, 63 insertions, 165 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index c2641bc995..bc51fffb77 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -51,7 +51,7 @@ my %ignore_type = (); my @ignore = (); my $help = 0; my $configuration_file = ".checkpatch.conf"; -my $max_line_length = 80; +my $max_line_length = 100; my $ignore_perl_version = 0; my $minimum_perl_version = 5.10.0; my $min_conf_desc_length = 4; @@ -61,9 +61,7 @@ my $codespellfile = "/usr/share/codespell/dictionary.txt"; my $conststructsfile = "$D/const_structs.checkpatch"; my $typedefsfile = ""; my $color = "auto"; -my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE -# git output parsing needs US English output, so first set backtick child process LANGUAGE -my $git_command ='export LANGUAGE=en_US.UTF-8; git'; +my $allow_c99_comments = 1; sub help { my ($exitcode) = @_; @@ -96,7 +94,9 @@ Options: --types TYPE(,TYPE2...) show only these comma separated message types --ignore TYPE(,TYPE2...) ignore various comma separated message types --show-types show the specific message type in the output - --max-line-length=n set the maximum line length, if exceeded, warn + --max-line-length=n set the maximum line length, (default $max_line_length) + if exceeded, warn on patches + requires --strict for use with --file --min-conf-desc-length=n set the min description length, if shorter, warn --root=PATH PATH to the kernel tree root --no-summary suppress the per-file summary @@ -470,19 +470,8 @@ our $logFunctions = qr{(?x: seq_vprintf|seq_printf|seq_puts )}; -our $allocFunctions = qr{(?x: - (?:(?:devm_)? - (?:kv|k|v)[czm]alloc(?:_node|_array)? | - kstrdup(?:_const)? | - kmemdup(?:_nul)?) | - (?:\w+)?alloc_skb(?:ip_align)? | - # dev_alloc_skb/netdev_alloc_skb, et al - dma_alloc_coherent -)}; - our $signature_tags = qr{(?xi: Signed-off-by:| - Co-developed-by:| Acked-by:| Tested-by:| Reviewed-by:| @@ -588,27 +577,6 @@ foreach my $entry (@mode_permission_funcs) { } $mode_perms_search = "(?:${mode_perms_search})"; -our %deprecated_apis = ( - "synchronize_rcu_bh" => "synchronize_rcu", - "synchronize_rcu_bh_expedited" => "synchronize_rcu_expedited", - "call_rcu_bh" => "call_rcu", - "rcu_barrier_bh" => "rcu_barrier", - "synchronize_sched" => "synchronize_rcu", - "synchronize_sched_expedited" => "synchronize_rcu_expedited", - "call_rcu_sched" => "call_rcu", - "rcu_barrier_sched" => "rcu_barrier", - "get_state_synchronize_sched" => "get_state_synchronize_rcu", - "cond_synchronize_sched" => "cond_synchronize_rcu", -); - -#Create a search pattern for all these strings to speed up a loop below -our $deprecated_apis_search = ""; -foreach my $entry (keys %deprecated_apis) { - $deprecated_apis_search .= '|' if ($deprecated_apis_search ne ""); - $deprecated_apis_search .= $entry; -} -$deprecated_apis_search = "(?:${deprecated_apis_search})"; - our $mode_perms_world_writable = qr{ S_IWUGO | S_IWOTH | @@ -908,7 +876,7 @@ sub seed_camelcase_includes { $camelcase_seeded = 1; if (-e ".git") { - my $git_last_include_commit = `${git_command} log --no-merges --pretty=format:"%h%n" -1 -- include`; + my $git_last_include_commit = `git log --no-merges --pretty=format:"%h%n" -1 -- include`; chomp $git_last_include_commit; $camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit"; } else { @@ -936,7 +904,7 @@ sub seed_camelcase_includes { } if (-e ".git") { - $files = `${git_command} ls-files "include/*.h"`; + $files = `git ls-files "include/*.h"`; @include_files = split('\n', $files); } @@ -960,13 +928,13 @@ sub git_commit_info { return ($id, $desc) if ((which("git") eq "") || !(-e ".git")); - my $output = `${git_command} log --no-color --format='%H %s' -1 $commit 2>&1`; + my $output = `git log --no-color --format='%H %s' -1 $commit 2>&1`; $output =~ s/^\s*//gm; my @lines = split("\n", $output); return ($id, $desc) if ($#lines < 0); - if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous/) { + if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous\./) { # Maybe one day convert this block of bash into something that returns # all matching commit ids, but it's very slow... # @@ -1010,7 +978,7 @@ if ($git) { } else { $git_range = "-1 $commit_expr"; } - my $lines = `${git_command} log --no-color --no-merges --pretty=format:'%H %s' $git_range`; + my $lines = `git log --no-color --no-merges --pretty=format:'%H %s' $git_range`; foreach my $line (split(/\n/, $lines)) { $line =~ /^([0-9a-fA-F]{40,40}) (.*)$/; next if (!defined($1) || !defined($2)); @@ -1025,7 +993,6 @@ if ($git) { } my $vname; -$allow_c99_comments = !defined $ignore_type{"C99_COMMENT_TOLERANCE"}; for my $filename (@ARGV) { my $FILE; if ($git) { @@ -2691,24 +2658,6 @@ sub process { } else { $signatures{$sig_nospace} = 1; } - -# Check Co-developed-by: immediately followed by Signed-off-by: with same name and email - if ($sign_off =~ /^co-developed-by:$/i) { - if ($email eq $author) { - WARN("BAD_SIGN_OFF", - "Co-developed-by: should not be used to attribute nominal patch author '$author'\n" . "$here\n" . $rawline); - } - if (!defined $lines[$linenr]) { - WARN("BAD_SIGN_OFF", - "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline); - } elsif ($rawlines[$linenr] !~ /^\s*signed-off-by:\s*(.*)/i) { - WARN("BAD_SIGN_OFF", - "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]); - } elsif ($1 ne $email) { - WARN("BAD_SIGN_OFF", - "Co-developed-by and Signed-off-by: name/email do not match \n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]); - } - } } # Check email subject for common tools that don't need to be mentioned @@ -2729,10 +2678,8 @@ sub process { ($line =~ /^\s*(?:WARNING:|BUG:)/ || $line =~ /^\s*\[\s*\d+\.\d{6,6}\s*\]/ || # timestamp - $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/) || - $line =~ /^(?:\s+\w+:\s+[0-9a-fA-F]+){3,3}/ || - $line =~ /^\s*\#\d+\s*\[[0-9a-fA-F]+\]\s*\w+ at [0-9a-fA-F]+/) { - # stack dump address styles + $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/)) { + # stack dump address $commit_log_possible_stack_dump = 1; } @@ -2904,17 +2851,6 @@ sub process { } } -# check for invalid commit id - if ($in_commit_log && $line =~ /(^fixes:|\bcommit)\s+([0-9a-f]{6,40})\b/i) { - my $id; - my $description; - ($id, $description) = git_commit_info($2, undef, undef); - if (!defined($id)) { - WARN("UNKNOWN_COMMIT_ID", - "Unknown commit id '$2', maybe rebased or not pulled?\n" . $herecurr); - } - } - # ignore non-hunk lines and lines being removed next if (!$hunk_line || $line =~ /^-/); @@ -3044,7 +2980,7 @@ sub process { my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g; my $dt_path = $root . "/Documentation/devicetree/bindings/"; - my $vp_file = $dt_path . "vendor-prefixes.yaml"; + my $vp_file = $dt_path . "vendor-prefixes.txt"; foreach my $compat (@compats) { my $compat2 = $compat; @@ -3059,7 +2995,7 @@ sub process { next if $compat !~ /^([a-zA-Z0-9\-]+)\,/; my $vendor = $1; - `grep -Eq "\\"\\^\Q$vendor\E,\\.\\*\\":" $vp_file`; + `grep -Eq "^$vendor\\b" $vp_file`; if ( $? >> 8 ) { WARN("UNDOCUMENTED_DT_STRING", "DT compatible string vendor \"$vendor\" appears un-documented -- check $vp_file\n" . $herecurr); @@ -3083,24 +3019,16 @@ sub process { $comment = '..'; } -# check SPDX comment style for .[chsS] files - if ($realfile =~ /\.[chsS]$/ && - $rawline =~ /SPDX-License-Identifier:/ && - $rawline !~ m@^\+\s*\Q$comment\E\s*@) { - WARN("SPDX_LICENSE_TAG", - "Improper SPDX comment style for '$realfile', please use '$comment' instead\n" . $herecurr); - } - if ($comment !~ /^$/ && - $rawline !~ m@^\+\Q$comment\E SPDX-License-Identifier: @) { - WARN("SPDX_LICENSE_TAG", - "Missing or malformed SPDX-License-Identifier tag in line $checklicenseline\n" . $herecurr); + $rawline !~ /^\+\Q$comment\E SPDX-License-Identifier: /) { + WARN("SPDX_LICENSE_TAG", + "Missing or malformed SPDX-License-Identifier tag in line $checklicenseline\n" . $herecurr); } elsif ($rawline =~ /(SPDX-License-Identifier: .*)/) { - my $spdx_license = $1; - if (!is_SPDX_License_valid($spdx_license)) { - WARN("SPDX_LICENSE_TAG", - "'$spdx_license' is not supported in LICENSES/...\n" . $herecurr); - } + my $spdx_license = $1; + if (!is_SPDX_License_valid($spdx_license)) { + WARN("SPDX_LICENSE_TAG", + "'$spdx_license' is not supported in LICENSES/...\n" . $herecurr); + } } } } @@ -3108,14 +3036,6 @@ sub process { # check we are in a valid source file if not then ignore this hunk next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/); -# check for using SPDX-License-Identifier on the wrong line number - if ($realline != $checklicenseline && - $rawline =~ /\bSPDX-License-Identifier:/ && - substr($line, @-, @+ - @-) eq "$;" x (@+ - @-)) { - WARN("SPDX_LICENSE_TAG", - "Misplaced SPDX-License-Identifier tag - use line $checklicenseline instead\n" . $herecurr); - } - # line length limit (with some exclusions) # # There are a few types of lines that may extend beyond $max_line_length: @@ -3173,8 +3093,10 @@ sub process { if ($msg_type ne "" && (show_type("LONG_LINE") || show_type($msg_type))) { - WARN($msg_type, - "line over $max_line_length characters\n" . $herecurr); + my $msg_level = \&WARN; + $msg_level = \&CHK if ($file); + &{$msg_level}($msg_type, + "line length of $length exceeds $max_line_length columns\n" . $herecurr); } } @@ -3953,23 +3875,14 @@ sub process { WARN("STATIC_CONST_CHAR_ARRAY", "static const char * array should probably be static const char * const\n" . $herecurr); - } - -# check for initialized const char arrays that should be static const - if ($line =~ /^\+\s*const\s+(char|unsigned\s+char|_*u8|(?:[us]_)?int8_t)\s+\w+\s*\[\s*(?:\w+\s*)?\]\s*=\s*"/) { - if (WARN("STATIC_CONST_CHAR_ARRAY", - "const array should probably be static const\n" . $herecurr) && - $fix) { - $fixed[$fixlinenr] =~ s/(^.\s*)const\b/${1}static const/; - } - } + } # check for static char foo[] = "bar" declarations. if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) { WARN("STATIC_CONST_CHAR_ARRAY", "static char array declaration should probably be static const char\n" . $herecurr); - } + } # check for const <foo> const where <foo> is not a pointer or array type if ($sline =~ /\bconst\s+($BasicType)\s+const\b/) { @@ -4677,7 +4590,7 @@ sub process { # closing brace should have a space following it when it has anything # on the line - if ($line =~ /}(?!(?:,|;|\)|\}))\S/) { + if ($line =~ /}(?!(?:,|;|\)))\S/) { if (ERROR("SPACING", "space required after that close brace '}'\n" . $herecurr) && $fix) { @@ -5027,6 +4940,17 @@ sub process { while ($line =~ m{($Constant|$Lval)}g) { my $var = $1; +#gcc binary extension + if ($var =~ /^$Binary$/) { + if (WARN("GCC_BINARY_CONSTANT", + "Avoid gcc v4.3+ binary constant extension: <$var>\n" . $herecurr) && + $fix) { + my $hexval = sprintf("0x%x", oct($var)); + $fixed[$fixlinenr] =~ + s/\b$var\b/$hexval/; + } + } + #CamelCase if ($var !~ /^$Constant$/ && $var =~ /[A-Z][a-z]|[a-z][A-Z]/ && @@ -5208,7 +5132,7 @@ sub process { next if ($arg =~ /\.\.\./); next if ($arg =~ /^type$/i); my $tmp_stmt = $define_stmt; - $tmp_stmt =~ s/\b(sizeof|typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g; + $tmp_stmt =~ s/\b(typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g; $tmp_stmt =~ s/\#+\s*$arg\b//g; $tmp_stmt =~ s/\b$arg\s*\#\#//g; my $use_cnt = () = $tmp_stmt =~ /\b$arg\b/g; @@ -5607,8 +5531,7 @@ sub process { my ($s, $c) = ctx_statement_block($linenr - 3, $realcnt, 0); # print("line: <$line>\nprevline: <$prevline>\ns: <$s>\nc: <$c>\n\n\n"); - if ($s =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*$allocFunctions\s*\(/ && - $s !~ /\b__GFP_NOWARN\b/ ) { + if ($s =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*(?:devm_)?(?:[kv][czm]alloc(?:_node|_array)?\b|kstrdup|kmemdup|(?:dev_)?alloc_skb)/) { WARN("OOM_MESSAGE", "Possible unnecessary 'out of memory' message\n" . $hereprev); } @@ -5729,7 +5652,7 @@ sub process { # ignore udelay's < 10, however if (! ($delay < 10) ) { CHK("USLEEP_RANGE", - "usleep_range is preferred over udelay; see Documentation/timers/timers-howto.rst\n" . $herecurr); + "usleep_range is preferred over udelay; see Documentation/timers/timers-howto.txt\n" . $herecurr); } if ($delay > 2000) { WARN("LONG_UDELAY", @@ -5741,7 +5664,7 @@ sub process { if ($line =~ /\bmsleep\s*\((\d+)\);/) { if ($1 < 20) { WARN("MSLEEP", - "msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.rst\n" . $herecurr); + "msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt\n" . $herecurr); } } @@ -5890,18 +5813,6 @@ sub process { "__aligned(size) is preferred over __attribute__((aligned(size)))\n" . $herecurr); } -# Check for __attribute__ section, prefer __section - if ($realfile !~ m@\binclude/uapi/@ && - $line =~ /\b__attribute__\s*\(\s*\(.*_*section_*\s*\(\s*("[^"]*")/) { - my $old = substr($rawline, $-[1], $+[1] - $-[1]); - my $new = substr($old, 1, -1); - if (WARN("PREFER_SECTION", - "__section($new) is preferred over __attribute__((section($old)))\n" . $herecurr) && - $fix) { - $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*_*section_*\s*\(\s*\Q$old\E\s*\)\s*\)\s*\)/__section($new)/; - } - } - # Check for __attribute__ format(printf, prefer __printf if ($realfile !~ m@\binclude/uapi/@ && $line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf/) { @@ -6024,7 +5935,7 @@ sub process { while ($fmt =~ /(\%[\*\d\.]*p(\w))/g) { $specifier = $1; $extension = $2; - if ($extension !~ /[SsBKRraEhMmIiUDdgVCbGNOxt]/) { + if ($extension !~ /[SsBKRraEhMmIiUDdgVCbGNOx]/) { $bad_specifier = $specifier; last; } @@ -6144,11 +6055,11 @@ sub process { my $max = $7; if ($min eq $max) { WARN("USLEEP_RANGE", - "usleep_range should not use min == max args; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n"); + "usleep_range should not use min == max args; see Documentation/timers/timers-howto.txt\n" . "$here\n$stat\n"); } elsif ($min =~ /^\d+$/ && $max =~ /^\d+$/ && $min > $max) { WARN("USLEEP_RANGE", - "usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n"); + "usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.txt\n" . "$here\n$stat\n"); } } @@ -6271,8 +6182,8 @@ sub process { } } -# check for pointless casting of alloc functions - if ($line =~ /\*\s*\)\s*$allocFunctions\b/) { +# check for pointless casting of kmalloc return + if ($line =~ /\*\s*\)\s*[kv][czm]alloc(_node){0,1}\b/) { WARN("UNNECESSARY_CASTS", "unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr); } @@ -6280,7 +6191,7 @@ sub process { # alloc style # p = alloc(sizeof(struct foo), ...) should be p = alloc(sizeof(*p), ...) if ($perl_version_ok && - $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k|v)[mz]alloc(?:_node)?)\s*\(\s*(sizeof\s*\(\s*struct\s+$Lval\s*\))/) { + $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*([kv][mz]alloc(?:_node)?)\s*\(\s*(sizeof\s*\(\s*struct\s+$Lval\s*\))/) { CHK("ALLOC_SIZEOF_STRUCT", "Prefer $3(sizeof(*$1)...) over $3($4...)\n" . $herecurr); } @@ -6443,6 +6354,19 @@ sub process { } } +# check for bool bitfields + if ($sline =~ /^.\s+bool\s*$Ident\s*:\s*\d+\s*;/) { + WARN("BOOL_BITFIELD", + "Avoid using bool as bitfield. Prefer bool bitfields as unsigned int or u<8|16|32>\n" . $herecurr); + } + +# check for bool use in .h files + if ($realfile =~ /\.h$/ && + $sline =~ /^.\s+bool\s*$Ident\s*(?::\s*d+\s*)?;/) { + CHK("BOOL_MEMBER", + "Avoid using bool structure members because of possible alignment issues - see: https://lkml.org/lkml/2017/11/21/384\n" . $herecurr); + } + # check for semaphores initialized locked if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) { WARN("CONSIDER_COMPLETION", @@ -6461,20 +6385,6 @@ sub process { "please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr); } -# check for spin_is_locked(), suggest lockdep instead - if ($line =~ /\bspin_is_locked\(/) { - WARN("USE_LOCKDEP", - "Where possible, use lockdep_assert_held instead of assertions based on spin_is_locked\n" . $herecurr); - } - -# check for deprecated apis - if ($line =~ /\b($deprecated_apis_search)\b\s*\(/) { - my $deprecated_api = $1; - my $new_api = $deprecated_apis{$deprecated_api}; - WARN("DEPRECATED_API", - "Deprecated use of '$deprecated_api', prefer '$new_api' instead\n" . $herecurr); - } - # check for various structs that are normally const (ops, kgdb, device_tree) # and avoid what seem like struct definitions 'struct foo {' if ($line !~ /\bconst\b/ && @@ -6509,12 +6419,6 @@ sub process { "Using $1 should generally have parentheses around the comparison\n" . $herecurr); } -# nested likely/unlikely calls - if ($line =~ /\b(?:(?:un)?likely)\s*\(\s*!?\s*(IS_ERR(?:_OR_NULL|_VALUE)?|WARN)/) { - WARN("LIKELY_MISUSE", - "nested (un)?likely() calls, $1 already uses unlikely() internally\n" . $herecurr); - } - # whine mightly about in_atomic if ($line =~ /\bin_atomic\s*\(/) { if ($realfile =~ m@^drivers/@) { @@ -6674,12 +6578,6 @@ sub process { "unknown module license " . $extracted_string . "\n" . $herecurr); } } - -# check for sysctl duplicate constants - if ($line =~ /\.extra[12]\s*=\s*&(zero|one|int_max)\b/) { - WARN("DUPLICATED_SYSCTL_CONST", - "duplicated sysctl range checking value '$1', consider using the shared one in include/linux/sysctl.h\n" . $herecurr); - } } # If we have no input at all, then there is nothing to report on |