Update checkpatch
authorBarret Rhoden <brho@cs.berkeley.edu>
Fri, 20 Jul 2018 17:51:55 +0000 (13:51 -0400)
committerBarret Rhoden <brho@cs.berkeley.edu>
Fri, 20 Jul 2018 17:54:08 +0000 (13:54 -0400)
The diff is from Linux, with some minor merges needed for our
customizations.  We're now up to date with Linux's commit 28c20cc73b9c
("Merge tag 'drm-fixes-2018-07-20' of
git://anongit.freedesktop.org/drm/drm")

git diff c6fa8e6de3dc..linus/master scripts/checkpatch.pl > ~/cp.patch
patch -p1 < ~/cp.patch

Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>
scripts/checkpatch.pl
scripts/const_structs.checkpatch [new file with mode: 0644]

index b96b86f..ce183c1 100755 (executable)
@@ -1,9 +1,11 @@
-#!/usr/bin/perl -w
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
+#
 # (c) 2001, Dave Jones. (the file handling bit)
 # (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
 # (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
 # (c) 2008-2010 Andy Whitcroft <apw@canonical.com>
-# Licensed under the terms of the GNU GPL License version 2
+# (c) 2010-2018 Joe Perches <joe@perches.com>
 #
 # Modifications for Akaros:
 #   Copyright (c) 2015 Google Inc
@@ -23,6 +25,7 @@
 # - Allow Gerrit change-ids
 
 use strict;
+use warnings;
 use POSIX;
 use File::Basename;
 use Cwd 'abs_path';
@@ -44,12 +47,15 @@ my $emacs = 0;
 my $terse = 0;
 my $showfile = 0;
 my $file = 0;
+my $git = 0;
+my %git_commits = ();
 my $check = 0;
 my $check_orig = 0;
 my $summary = 1;
 my $mailback = 0;
 my $summary_file = 0;
 my $show_types = 0;
+my $list_types = 0;
 my $fix = 0;
 my $fix_inplace = 0;
 my $root;
@@ -68,7 +74,10 @@ my $min_conf_desc_length = 4;
 my $spelling_file = "$D/spelling.txt";
 my $codespell = 0;
 my $codespellfile = "/usr/share/codespell/dictionary.txt";
-my $color = 1;
+my $conststructsfile = "$D/const_structs.checkpatch";
+my $typedefsfile = "";
+my $color = "auto";
+my $allow_c99_comments = 1;
 my $tab_length = 4;
 
 sub help {
@@ -86,13 +95,24 @@ Options:
   --emacs                    emacs compile window format
   --terse                    one line per report
   --showfile                 emit diffed file position, not input file position
+  -g, --git                  treat FILE as a single commit or git revision range
+                             single git commit with:
+                               <rev>
+                               <rev>^
+                               <rev>~n
+                             multiple git commits with:
+                               <rev1>..<rev2>
+                               <rev1>...<rev2>
+                               <rev>-<count>
+                             git merges are ignored
   -f, --file                 treat FILE as regular source file
   --subjective, --strict     enable more subjective tests
+  --list-types               list the possible message types
   --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
   --min-conf-desc-length=n   set the min description length, if shorter, warn
-  --show-types               show the message "types" in the output
   --root=PATH                PATH to the kernel tree root
   --no-summary               suppress the per-file summary
   --mailback                 only produce a report in case of warnings/errors
@@ -115,7 +135,9 @@ Options:
   --codespell                Use the codespell dictionary for spelling/typos
                              (default:/usr/share/codespell/dictionary.txt)
   --codespellfile            Use this codespell dictionary
-  --color                    Use colors when output is STDOUT (default: on)
+  --typedefsfile             Read additional types from this file
+  --color[=WHEN]             Use colors 'always', 'never', or only when output
+                             is a terminal ('auto'). Default is 'auto'.
   -h, --help, --version      display this help and exit
 
 When FILE is - read standard input.
@@ -124,6 +146,38 @@ EOM
        exit($exitcode);
 }
 
+sub uniq {
+       my %seen;
+       return grep { !$seen{$_}++ } @_;
+}
+
+sub list_types {
+       my ($exitcode) = @_;
+
+       my $count = 0;
+
+       local $/ = undef;
+
+       open(my $script, '<', abs_path($P)) or
+           die "$P: Can't read '$P' $!\n";
+
+       my $text = <$script>;
+       close($script);
+
+       my @types = ();
+       # Also catch when type or level is passed through a variable
+       for ($text =~ /(?:(?:\bCHK|\bWARN|\bERROR|&\{\$msg_level})\s*\(|\$msg_type\s*=)\s*"([^"]+)"/g) {
+               push (@types, $_);
+       }
+       @types = sort(uniq(@types));
+       print("#\tMessage type\n\n");
+       foreach my $type (@types) {
+               print(++$count . "\t" . $type . "\n");
+       }
+
+       exit($exitcode);
+}
+
 my $conf = which_conf($configuration_file);
 if (-f $conf) {
        my @conf_args;
@@ -150,6 +204,14 @@ if (-f $conf) {
        unshift(@ARGV, @conf_args) if @conf_args;
 }
 
+# Perl's Getopt::Long allows options to take optional arguments after a space.
+# Prevent --color by itself from consuming other arguments
+foreach (@ARGV) {
+       if ($_ eq "--color" || $_ eq "-color") {
+               $_ = "--color=$color";
+       }
+}
+
 GetOptions(
        'q|quiet+'      => \$quiet,
        'tree!'         => \$tree,
@@ -159,11 +221,13 @@ GetOptions(
        'terse!'        => \$terse,
        'showfile!'     => \$showfile,
        'f|file!'       => \$file,
+       'g|git!'        => \$git,
        'subjective!'   => \$check,
        'strict!'       => \$check,
        'ignore=s'      => \@ignore,
        'types=s'       => \@use,
        'show-types!'   => \$show_types,
+       'list-types!'   => \$list_types,
        'max-line-length=i' => \$max_line_length,
        'min-conf-desc-length=i' => \$min_conf_desc_length,
        'root=s'        => \$root,
@@ -177,13 +241,18 @@ GetOptions(
        'test-only=s'   => \$tst_only,
        'codespell!'    => \$codespell,
        'codespellfile=s'       => \$codespellfile,
-       'color!'        => \$color,
+       'typedefsfile=s'        => \$typedefsfile,
+       'color=s'       => \$color,
+       'no-color'      => \$color,     #keep old behaviors of -nocolor
+       'nocolor'       => \$color,     #keep old behaviors of -nocolor
        'h|help'        => \$help,
        'version'       => \$help
 ) or help(1);
 
 help(0) if ($help);
 
+list_types(0) if ($list_types);
+
 $fix = 1 if ($fix_inplace);
 $check_orig = $check;
 
@@ -196,9 +265,21 @@ if ($^V && $^V lt $minimum_perl_version) {
        }
 }
 
+#if no filenames are given, push '-' to read patch from stdin
 if ($#ARGV < 0) {
-       print "$P: no input files\n";
-       exit(1);
+       push(@ARGV, '-');
+}
+
+if ($color =~ /^[01]$/) {
+       $color = !$color;
+} elsif ($color =~ /^always$/i) {
+       $color = 1;
+} elsif ($color =~ /^never$/i) {
+       $color = 0;
+} elsif ($color =~ /^auto$/i) {
+       $color = (-t STDOUT);
+} else {
+       die "Invalid color mode: $color\n";
 }
 
 sub hash_save_array_words {
@@ -282,12 +363,12 @@ our $Sparse       = qr{
                        __kernel|
                        __force|
                        __iomem|
-                       __pmem|
                        __must_check|
                        __init_refok|
                        __kprobes|
                        __ref|
-                       __rcu
+                       __rcu|
+                       __private
                }x;
 our $InitAttributePrefix = qr{__(?:mem|cpu|dev|net_|)};
 our $InitAttributeData = qr{$InitAttributePrefix(?:initdata\b)};
@@ -302,7 +383,7 @@ our $Attribute      = qr{
                        __percpu|
                        __nocast|
                        __safe|
-                       __bitwise__|
+                       __bitwise|
                        __packed__|
                        __packed2__|
                        __naked|
@@ -388,9 +469,12 @@ our $typeTypedefs = qr{(?x:
        $typeKernelTypedefs\b
 )};
 
+our $zero_initializer = qr{(?:(?:0[xX])?0+$Int_type?|NULL|false)\b};
+
 our $logFunctions = qr{(?x:
-       printk(?:_ratelimited|_once|)|
+       printk(?:_ratelimited|_once|_deferred_once|_deferred|)|
        (?:[a-z0-9]+_){1,2}(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|)|
+       TP_printk|
        WARN(?:_RATELIMIT|_ONCE|)|
        panic|
        MODULE_[A-Z_]+|
@@ -449,6 +533,28 @@ our @typeList = (
        qr{${Ident}_handler_fn},
        @typeListMisordered,
 );
+
+our $C90_int_types = qr{(?x:
+       long\s+long\s+int\s+(?:un)?signed|
+       long\s+long\s+(?:un)?signed\s+int|
+       long\s+long\s+(?:un)?signed|
+       (?:(?:un)?signed\s+)?long\s+long\s+int|
+       (?:(?:un)?signed\s+)?long\s+long|
+       int\s+long\s+long\s+(?:un)?signed|
+       int\s+(?:(?:un)?signed\s+)?long\s+long|
+
+       long\s+int\s+(?:un)?signed|
+       long\s+(?:un)?signed\s+int|
+       long\s+(?:un)?signed|
+       (?:(?:un)?signed\s+)?long\s+int|
+       (?:(?:un)?signed\s+)?long|
+       int\s+long\s+(?:un)?signed|
+       int\s+(?:(?:un)?signed\s+)?long|
+
+       int\s+(?:un)?signed|
+       (?:(?:un)?signed\s+)?int
+)};
+
 our @typeListFile = ();
 our @typeListWithAttr = (
        @typeList,
@@ -467,7 +573,11 @@ our @mode_permission_funcs = (
        ["module_param_array_named", 5],
        ["debugfs_create_(?:file|u8|u16|u32|u64|x8|x16|x32|x64|size_t|atomic_t|bool|blob|regset32|u32_array)", 2],
        ["proc_create(?:_data|)", 2],
-       ["(?:CLASS|DEVICE|SENSOR)_ATTR", 2],
+       ["(?:CLASS|DEVICE|SENSOR|SENSOR_DEVICE|IIO_DEVICE)_ATTR", 2],
+       ["IIO_DEV_ATTR_[A-Z_]+", 1],
+       ["SENSOR_(?:DEVICE_|)ATTR_2", 2],
+       ["SENSOR_TEMPLATE(?:_2|)", 3],
+       ["__ATTR", 2],
 );
 
 #Create a search pattern for all these functions to speed up a loop below
@@ -476,6 +586,7 @@ foreach my $entry (@mode_permission_funcs) {
        $mode_perms_search .= '|' if ($mode_perms_search ne "");
        $mode_perms_search .= $entry->[0];
 }
+$mode_perms_search = "(?:${mode_perms_search})";
 
 our $mode_perms_world_writable = qr{
        S_IWUGO         |
@@ -485,6 +596,63 @@ our $mode_perms_world_writable = qr{
        0[0-7][0-7][2367]
 }x;
 
+our %mode_permission_string_types = (
+       "S_IRWXU" => 0700,
+       "S_IRUSR" => 0400,
+       "S_IWUSR" => 0200,
+       "S_IXUSR" => 0100,
+       "S_IRWXG" => 0070,
+       "S_IRGRP" => 0040,
+       "S_IWGRP" => 0020,
+       "S_IXGRP" => 0010,
+       "S_IRWXO" => 0007,
+       "S_IROTH" => 0004,
+       "S_IWOTH" => 0002,
+       "S_IXOTH" => 0001,
+       "S_IRWXUGO" => 0777,
+       "S_IRUGO" => 0444,
+       "S_IWUGO" => 0222,
+       "S_IXUGO" => 0111,
+);
+
+#Create a search pattern for all these strings to speed up a loop below
+our $mode_perms_string_search = "";
+foreach my $entry (keys %mode_permission_string_types) {
+       $mode_perms_string_search .= '|' if ($mode_perms_string_search ne "");
+       $mode_perms_string_search .= $entry;
+}
+our $single_mode_perms_string_search = "(?:${mode_perms_string_search})";
+our $multi_mode_perms_string_search = qr{
+       ${single_mode_perms_string_search}
+       (?:\s*\|\s*${single_mode_perms_string_search})*
+}x;
+
+sub perms_to_octal {
+       my ($string) = @_;
+
+       return trim($string) if ($string =~ /^\s*0[0-7]{3,3}\s*$/);
+
+       my $val = "";
+       my $oval = "";
+       my $to = 0;
+       my $curpos = 0;
+       my $lastpos = 0;
+       while ($string =~ /\b(($single_mode_perms_string_search)\b(?:\s*\|\s*)?\s*)/g) {
+               $curpos = pos($string);
+               my $match = $2;
+               my $omatch = $1;
+               last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos));
+               $lastpos = $curpos;
+               $to |= $mode_permission_string_types{$match};
+               $val .= '\s*\|\s*' if ($val ne "");
+               $val .= $match;
+               $oval .= $omatch;
+       }
+       $oval =~ s/^\s*\|\s*//;
+       $oval =~ s/\s*\|\s*$//;
+       return sprintf("%04o", $to);
+}
+
 our $allowed_asm_includes = qr{(?x:
        irq|
        memory|
@@ -542,6 +710,44 @@ if ($codespell) {
 
 $misspellings = join("|", sort keys %spelling_fix) if keys %spelling_fix;
 
+sub read_words {
+       my ($wordsRef, $file) = @_;
+
+       if (open(my $words, '<', $file)) {
+               while (<$words>) {
+                       my $line = $_;
+
+                       $line =~ s/\s*\n?$//g;
+                       $line =~ s/^\s*//g;
+
+                       next if ($line =~ m/^\s*#/);
+                       next if ($line =~ m/^\s*$/);
+                       if ($line =~ /\s/) {
+                               print("$file: '$line' invalid - ignored\n");
+                               next;
+                       }
+
+                       $$wordsRef .= '|' if ($$wordsRef ne "");
+                       $$wordsRef .= $line;
+               }
+               close($file);
+               return 1;
+       }
+
+       return 0;
+}
+
+my $const_structs = "";
+read_words(\$const_structs, $conststructsfile)
+    or warn "No structs that should be const will be found - file '$conststructsfile': $!\n";
+
+my $typeOtherTypedefs = "";
+if (length($typedefsfile)) {
+       read_words(\$typeOtherTypedefs, $typedefsfile)
+           or warn "No additional types will be considered - file '$typedefsfile': $!\n";
+}
+$typeTypedefs .= '|' . $typeOtherTypedefs if ($typeOtherTypedefs ne "");
+
 sub build_types {
        my $mods = "(?x:  \n" . join("|\n  ", (@modifierList, @modifierListFile)) . "\n)";
        my $all = "(?x:  \n" . join("|\n  ", (@typeList, @typeListFile)) . "\n)";
@@ -604,8 +810,9 @@ 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]+){1,6}\s*\(|
-       (?:$Storage\s+)?LIST_HEAD\s*\(|
-       (?:$Storage\s+)?${Type}\s+uninitialized_var\s*\(
+       (?:$Storage\s+)?[HLP]?LIST_HEAD\s*\(|
+       (?:$Storage\s+)?${Type}\s+uninitialized_var\s*\(|
+       (?:SKCIPHER_REQUEST|SHASH_DESC|AHASH_REQUEST)_ON_STACK\s*\(
 )};
 
 sub deparenthesize {
@@ -648,6 +855,16 @@ sub seed_camelcase_file {
        }
 }
 
+sub is_maintained_obsolete {
+       my ($filename) = @_;
+
+       return 0 if (!$tree || !(-e "$root/scripts/get_maintainer.pl"));
+
+       my $status = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback -f $filename 2>&1`;
+
+       return $status =~ /obsolete/i;
+}
+
 my $camelcase_seeded = 0;
 sub seed_camelcase_includes {
        return if ($camelcase_seeded);
@@ -728,6 +945,7 @@ sub git_commit_info {
 #                  echo "commit $(cut -c 1-12,41-)"
 #              done
        } elsif ($lines[0] =~ /^fatal: ambiguous argument '$commit': unknown revision or path not in the working tree\./) {
+               $id = undef;
        } else {
                $id = substr($lines[0], 0, 12);
                $desc = substr($lines[0], 41);
@@ -745,10 +963,42 @@ my @fixed_inserted = ();
 my @fixed_deleted = ();
 my $fixlinenr = -1;
 
+# If input is git commits, extract all commits from the commit expressions.
+# For example, HEAD-3 means we need check 'HEAD, HEAD~1, HEAD~2'.
+die "$P: No git repository found\n" if ($git && !-e ".git");
+
+if ($git) {
+       my @commits = ();
+       foreach my $commit_expr (@ARGV) {
+               my $git_range;
+               if ($commit_expr =~ m/^(.*)-(\d+)$/) {
+                       $git_range = "-$2 $1";
+               } elsif ($commit_expr =~ m/\.\./) {
+                       $git_range = "$commit_expr";
+               } else {
+                       $git_range = "-1 $commit_expr";
+               }
+               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));
+                       my $sha1 = $1;
+                       my $subject = $2;
+                       unshift(@commits, $sha1);
+                       $git_commits{$sha1} = $subject;
+               }
+       }
+       die "$P: no git commits after extraction!\n" if (@commits == 0);
+       @ARGV = @commits;
+}
+
 my $vname;
 for my $filename (@ARGV) {
        my $FILE;
-       if ($file) {
+       if ($git) {
+               open($FILE, '-|', "git format-patch -M --stdout -1 $filename") ||
+                       die "$P: $filename: git format-patch failed - $!\n";
+       } elsif ($file) {
                open($FILE, '-|', "diff -u /dev/null $filename") ||
                        die "$P: $filename: diff failed - $!\n";
        } elsif ($filename eq '-') {
@@ -759,6 +1009,8 @@ for my $filename (@ARGV) {
        }
        if ($filename eq '-') {
                $vname = 'Your patch';
+       } elsif ($git) {
+               $vname = "Commit " . substr($filename, 0, 12) . ' ("' . $git_commits{$filename} . '")';
        } else {
                $vname = $filename;
        }
@@ -844,7 +1096,7 @@ sub parse_email {
        } elsif ($formatted_email =~ /(\S+\@\S+)(.*)$/) {
                $address = $1;
                $comment = $2 if defined $2;
-               $formatted_email =~ s/$address.*$//;
+               $formatted_email =~ s/\Q$address\E.*$//;
                $name = $formatted_email;
                $name = trim($name);
                $name =~ s/^\"|\"$//g;
@@ -986,7 +1238,7 @@ sub sanitise_line {
        for ($off = 1; $off < length($line); $off++) {
                $c = substr($line, $off, 1);
 
-               # Comments we are wacking completly including the begin
+               # Comments we are whacking completely including the begin
                # and end, all to $;.
                if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
                        $sanitise_quote = '*/';
@@ -1055,12 +1307,18 @@ sub sanitise_line {
                $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
        }
 
+       if ($allow_c99_comments && $res =~ m@(//.*$)@) {
+               my $match = $1;
+               $res =~ s/\Q$match\E/"$;" x length($match)/e;
+       }
+
        return $res;
 }
 
 sub get_quoted_string {
        my ($line, $rawline) = @_;
 
+       return "" if (!defined($line) || !defined($rawline));
        return "" if ($line !~ m/($String)/g);
        return substr($rawline, $-[0], $+[0] - $-[0]);
 }
@@ -1408,6 +1666,28 @@ sub raw_line {
        return $line;
 }
 
+sub get_stat_real {
+       my ($linenr, $lc) = @_;
+
+       my $stat_real = raw_line($linenr, 0);
+       for (my $count = $linenr + 1; $count <= $lc; $count++) {
+               $stat_real = $stat_real . "\n" . raw_line($count, 0);
+       }
+
+       return $stat_real;
+}
+
+sub get_stat_here {
+       my ($linenr, $cnt, $here) = @_;
+
+       my $herectx = $here . "\n";
+       for (my $n = 0; $n < $cnt; $n++) {
+               $herectx .= raw_line($linenr, $n) . "\n";
+       }
+
+       return $herectx;
+}
+
 sub cat_vet {
        my ($vet) = @_;
        my ($res, $coded);
@@ -1689,6 +1969,8 @@ my $prefix = '';
 sub show_type {
        my ($type) = @_;
 
+       $type =~ tr/[a-z]/[A-Z]/;
+
        return defined $use_type{$type} if (scalar keys %use_type > 0);
 
        return !defined $ignore_type{$type};
@@ -1702,7 +1984,7 @@ sub report {
                return 0;
        }
        my $output = '';
-       if (-t STDOUT && $color) {
+       if ($color) {
                if ($level eq 'ERROR') {
                        $output .= RED;
                } elsif ($level eq 'WARNING') {
@@ -1713,10 +1995,10 @@ sub report {
        }
        $output .= $prefix . $level . ':';
        if ($show_types) {
-               $output .= BLUE if (-t STDOUT && $color);
+               $output .= BLUE if ($color);
                $output .= "$type:";
        }
-       $output .= RESET if (-t STDOUT && $color);
+       $output .= RESET if ($color);
        $output .= ' ' . $msg . "\n";
 
        if ($showfile) {
@@ -1974,7 +2256,8 @@ sub process {
        my $is_patch = 0;
        my $in_header_lines = $file ? 0 : 1;
        my $in_commit_log = 0;          #Scanning lines before patch
-       my $commit_log_possible_stack_dump = 0;
+       my $has_commit_log = 0;         #Encountered lines before patch
+       my $commit_log_possible_stack_dump = 0;
        my $commit_log_long_line = 0;
        my $commit_log_has_diff = 0;
        my $reported_maintainer_file = 0;
@@ -1994,6 +2277,7 @@ sub process {
        my $realline = 0;
        my $realcnt = 0;
        my $here = '';
+       my $context_function;           #undef'd unless there's a known function
        my $in_comment = 0;
        my $comment_edge = 0;
        my $first_line = 0;
@@ -2017,6 +2301,8 @@ sub process {
 
        my $camelcase_file_seeded = 0;
 
+       my $checklicenseline = 1;
+
        sanitise_line_reset();
        my $line;
        foreach my $rawline (@rawlines) {
@@ -2027,12 +2313,12 @@ sub process {
 
                if ($rawline=~/^\+\+\+\s+(\S+)/) {
                        $setup_docs = 0;
-                       if ($1 =~ m@Documentation/kernel-parameters.txt$@) {
+                       if ($1 =~ m@Documentation/admin-guide/kernel-parameters.rst$@) {
                                $setup_docs = 1;
                        }
                        #next;
                }
-               if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
+               if ($rawline =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
                        $realline=$1-1;
                        if (defined $2) {
                                $realcnt=$3+1;
@@ -2109,9 +2395,18 @@ sub process {
 
                my $rawline = $rawlines[$linenr - 1];
 
+# check if it's a mode change, rename or start of a patch
+               if (!$in_commit_log &&
+                   ($line =~ /^ mode change [0-7]+ => [0-7]+ \S+\s*$/ ||
+                   ($line =~ /^rename (?:from|to) \S+\s*$/ ||
+                    $line =~ /^diff --git a\/[\w\/\.\_\-]+ b\/\S+\s*$/))) {
+                       $is_patch = 1;
+               }
+
 #extract the line range in the file after the patch is applied
                if (!$in_commit_log &&
-                   $line =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
+                   $line =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@(.*)/) {
+                       my $context = $4;
                        $is_patch = 1;
                        $first_line = $linenr + 1;
                        $realline=$1-1;
@@ -2127,6 +2422,11 @@ sub process {
                        %suppress_whiletrailers = ();
                        %suppress_export = ();
                        $suppress_statement = 0;
+                       if ($context =~ /\b(\w+)\s*\(/) {
+                               $context_function = $1;
+                       } else {
+                               undef $context_function;
+                       }
                        next;
 
 # track the line number as we move through the hunk, note that
@@ -2193,11 +2493,16 @@ sub process {
                }
 
                if ($found_file) {
+                       if (is_maintained_obsolete($realfile)) {
+                               WARN("OBSOLETE",
+                                    "$realfile is marked as 'obsolete' in the MAINTAINERS hierarchy.  No unnecessary modifications please.\n");
+                       }
                        if ($realfile =~ m@^(?:drivers/net/|net/|drivers/staging/)@) {
                                $check = 1;
                        } else {
                                $check = $check_orig;
                        }
+                       $checklicenseline = 1;
                        next;
                }
 
@@ -2319,54 +2624,51 @@ sub process {
                             "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",
-                             "The 'stable' address should be 'stable\@vger.kernel.org'\n" . $herecurr);
-               }
-
 ## Check for unwanted Gerrit info
 #              if ($in_commit_log && $line =~ /^\s*change-id:/i) {
 #                      ERROR("GERRIT_CHANGE_ID",
 #                            "Remove Gerrit Change-Id's before submitting upstream.\n" . $herecurr);
 #              }
 
+# Check if the commit log is in a possible stack dump
+               if ($in_commit_log && !$commit_log_possible_stack_dump &&
+                   ($line =~ /^\s*(?:WARNING:|BUG:)/ ||
+                    $line =~ /^\s*\[\s*\d+\.\d{6,6}\s*\]/ ||
+                                       # timestamp
+                    $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/)) {
+                                       # stack dump address
+                       $commit_log_possible_stack_dump = 1;
+               }
+
 # Check for line lengths > 75 in commit log, warn once
                if ($in_commit_log && !$commit_log_long_line &&
-                   length($line) > 75 &&
-                   !($line =~ /^\s*[a-zA-Z0-9_\/\.]+\s+\|\s+\d+/ ||
-                                       # file delta changes
-                     $line =~ /^\s*(?:[\w\.\-]+\/)++[\w\.\-]+:/ ||
-                                       # filename then :
-                     $line =~ /^\s*(?:Fixes:|Link:)/i ||
-                                       # A Fixes: or Link: line
-                     $commit_log_possible_stack_dump)) {
+                   length($line) > 75 &&
+                   !($line =~ /^\s*[a-zA-Z0-9_\/\.]+\s+\|\s+\d+/ ||
+                                       # file delta changes
+                     $line =~ /^\s*(?:[\w\.\-]+\/)++[\w\.\-]+:/ ||
+                                       # filename then :
+                     $line =~ /^\s*(?:Fixes:|Link:)/i ||
+                                       # A Fixes: or Link: line
+                     $commit_log_possible_stack_dump)) {
                        WARN("COMMIT_LOG_LONG_LINE",
                             "Possible unwrapped commit description (prefer a maximum 75 chars per line)\n" . $herecurr);
                        $commit_log_long_line = 1;
                }
 
-# Check if the commit log is in a possible stack dump
-               if ($in_commit_log && !$commit_log_possible_stack_dump &&
-                   ($line =~ /^\s*(?:WARNING:|BUG:)/ ||
-                    $line =~ /^\s*\[\s*\d+\.\d{6,6}\s*\]/ ||
-                               # timestamp
-                    $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/)) {
-                               # stack dump address
-                       $commit_log_possible_stack_dump = 1;
-               }
-
 # Reset possible stack dump if a blank line is found
-               if ($in_commit_log && $commit_log_possible_stack_dump &&
-                   $line =~ /^\s*$/) {
-                       $commit_log_possible_stack_dump = 0;
-               }
+               if ($in_commit_log && $commit_log_possible_stack_dump &&
+                   $line =~ /^\s*$/) {
+                       $commit_log_possible_stack_dump = 0;
+               }
 
 # Check for git id commit length and improperly formed commit descriptions
-               if ($in_commit_log &&
+               if ($in_commit_log && !$commit_log_possible_stack_dump &&
+                   $line !~ /^\s*(?:Link|Patchwork|http|https|BugLink):/i &&
+                   $line !~ /^This reverts commit [0-9a-f]{7,40}/ &&
                    ($line =~ /\bcommit\s+[0-9a-f]{5,}\b/i ||
-                    ($line =~ /\b[0-9a-f]{12,40}\b/i &&
-                     $line !~ /\bfixes:\s*[0-9a-f]{12,40}/i))) {
+                    ($line =~ /(?:\s|^)[0-9a-f]{12,40}(?:[\s"'\(\[]|$)/i &&
+                     $line !~ /[\<\[][0-9a-f]{12,40}[\>\]]/i &&
+                     $line !~ /\bfixes:\s*[0-9a-f]{12,40}/i))) {
                        my $init_char = "c";
                        my $orig_commit = "";
                        my $short = 1;
@@ -2411,7 +2713,8 @@ sub process {
                        ($id, $description) = git_commit_info($orig_commit,
                                                              $id, $orig_desc);
 
-                       if ($short || $long || $space || $case || ($orig_desc ne $description) || !$hasparens) {
+                       if (defined($id) &&
+                          ($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);
                        }
@@ -2423,6 +2726,7 @@ sub process {
 #                   $line =~ /^rename (?:from|to) [\w\/\.\-]+\s*$/ ||
 #                   ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ &&
 #                    (defined($1) || defined($2))))) {
+#                      $is_patch = 1;
 #                      $reported_maintainer_file = 1;
 #                      WARN("FILE_PATH_CHANGES",
 #                           "added, moved or deleted file(s), does MAINTAINERS need updating?\n" . $herecurr);
@@ -2435,20 +2739,6 @@ sub process {
                                $herecurr) if (!$emitted_corrupt++);
                }
 
-# Check for absolute kernel paths.
-               if ($tree) {
-                       while ($line =~ m{(?:^|\s)(/\S*)}g) {
-                               my $file = $1;
-
-                               if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
-                                   check_absolute_file($1, $herecurr)) {
-                                       #
-                               } else {
-                                       check_absolute_file($file, $herecurr);
-                               }
-                       }
-               }
-
 # UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
                if (($realfile =~ /^$/ || $line =~ /^\+/) &&
                    $rawline !~ m/^$UTF8*$/) {
@@ -2465,10 +2755,11 @@ sub process {
 # Check if it's the start of a commit log
 # (not a header line and we haven't seen the patch filename)
                if ($in_header_lines && $realfile =~ /^$/ &&
-                   !($rawline =~ /^\s+\S/ ||
-                     $rawline =~ /^(commit\b|from\b|[\w-]+:).*$/i)) {
+                   !($rawline =~ /^\s+(?:\S|$)/ ||
+                     $rawline =~ /^(?:commit\b|from\b|[\w-]+:)/i)) {
                        $in_header_lines = 0;
                        $in_commit_log = 1;
+                       $has_commit_log = 1;
                }
 
 # Check if there is UTF-8 in a commit log when a mail header has explicitly
@@ -2485,6 +2776,20 @@ sub process {
                            "8-bit UTF-8 used in possible commit log\n" . $herecurr);
                }
 
+# Check for absolute kernel paths in commit message
+               if ($tree && $in_commit_log) {
+                       while ($line =~ m{(?:^|\s)(/\S*)}g) {
+                               my $file = $1;
+
+                               if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
+                                   check_absolute_file($1, $herecurr)) {
+                                       #
+                               } else {
+                                       check_absolute_file($file, $herecurr);
+                               }
+                       }
+               }
+
 # Check for various typo / spelling mistakes
                if (defined($misspellings) &&
                    ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
@@ -2493,10 +2798,10 @@ sub process {
                                my $typo_fix = $spelling_fix{lc($typo)};
                                $typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/);
                                $typo_fix = uc($typo_fix) if ($typo =~ /^[A-Z]+$/);
-                               my $msg_type = \&WARN;
-                               $msg_type = \&CHK if ($file);
-                               if (&{$msg_type}("TYPO_SPELLING",
-                                                "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $herecurr) &&
+                               my $msg_level = \&WARN;
+                               $msg_level = \&CHK if ($file);
+                               if (&{$msg_level}("TYPO_SPELLING",
+                                                 "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $herecurr) &&
                                    $fix) {
                                        $fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($typo)($|[^A-Za-z@])/$1$typo_fix$3/;
                                }
@@ -2527,20 +2832,24 @@ sub process {
 
 # Check for FSF mailing addresses.
                if ($rawline =~ /\bwrite to the Free/i ||
+                   $rawline =~ /\b675\s+Mass\s+Ave/i ||
                    $rawline =~ /\b59\s+Temple\s+Pl/i ||
                    $rawline =~ /\b51\s+Franklin\s+St/i) {
                        my $herevet = "$here\n" . cat_vet($rawline) . "\n";
-                       my $msg_type = \&ERROR;
-                       $msg_type = \&CHK if ($file);
-                       &{$msg_type}("FSF_MAILING_ADDRESS",
-                                    "Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL.\n" . $herevet)
+                       my $msg_level = \&ERROR;
+                       $msg_level = \&CHK if ($file);
+                       &{$msg_level}("FSF_MAILING_ADDRESS",
+                                     "Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL.\n" . $herevet)
                }
 
 # check for Kconfig help text having a real description
 # Only applies when adding the entry originally, after that we do not have
 # sufficient context to determine whether it is indeed long enough.
                if ($realfile =~ /Kconfig/ &&
-                   $line =~ /^\+\s*config\s+/) {
+                   # 'choice' is usually the last thing on the line (though
+                   # Kconfig supports named choices), so use a word boundary
+                   # (\b) rather than a whitespace character (\s)
+                   $line =~ /^\+\s*(?:config|menuconfig|choice)\b/) {
                        my $length = 0;
                        my $cnt = $realcnt;
                        my $ln = $linenr + 1;
@@ -2555,9 +2864,13 @@ sub process {
                                next if ($f =~ /^-/);
                                last if (!$file && $f =~ /^\@\@/);
 
-                               if ($lines[$ln - 1] =~ /^\+\s*(?:bool|tristate)\s*\"/) {
+                               if ($lines[$ln - 1] =~ /^\+\s*(?:bool|tristate|prompt)\s*["']/) {
                                        $is_start = 1;
-                               } elsif ($lines[$ln - 1] =~ /^\+\s*(?:---)?help(?:---)?$/) {
+                               } elsif ($lines[$ln - 1] =~ /^\+\s*(?:help|---help---)\s*$/) {
+                                       if ($lines[$ln - 1] =~ "---help---") {
+                                               WARN("CONFIG_DESCRIPTION",
+                                                    "prefer 'help' over '---help---' for new help texts\n" . $herecurr);
+                                       }
                                        $length = -1;
                                }
 
@@ -2565,7 +2878,13 @@ sub process {
                                $f =~ s/#.*//;
                                $f =~ s/^\s+//;
                                next if ($f =~ /^$/);
-                               if ($f =~ /^\s*config\s/) {
+
+                               # This only checks context lines in the patch
+                               # and so hopefully shouldn't trigger false
+                               # positives, even though some of these are
+                               # common words in help texts
+                               if ($f =~ /^\s*(?:config|menuconfig|choice|endchoice|
+                                                 if|endif|menu|endmenu|source)\b/x) {
                                        $is_end = 1;
                                        last;
                                }
@@ -2578,11 +2897,15 @@ sub process {
                        #print "is_start<$is_start> is_end<$is_end> length<$length>\n";
                }
 
-# discourage the addition of CONFIG_EXPERIMENTAL in Kconfig.
-               if ($realfile =~ /Kconfig/ &&
-                   $line =~ /.\s*depends on\s+.*\bEXPERIMENTAL\b/) {
-                       WARN("CONFIG_EXPERIMENTAL",
-                            "Use of CONFIG_EXPERIMENTAL is deprecated. For alternatives, see https://lkml.org/lkml/2012/10/23/580\n");
+# check for MAINTAINERS entries that don't have the right form
+               if ($realfile =~ /^MAINTAINERS$/ &&
+                   $rawline =~ /^\+[A-Z]:/ &&
+                   $rawline !~ /^\+[A-Z]:\t\S/) {
+                       if (WARN("MAINTAINERS_STYLE",
+                                "MAINTAINERS entries use one tab after TYPE:\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$fixlinenr] =~ s/^(\+[A-Z]):\s*/$1:\t/;
+                       }
                }
 
 # discourage the use of boolean for type definition attributes of Kconfig options
@@ -2637,8 +2960,32 @@ sub process {
                        }
                }
 
+# check for using SPDX license tag at beginning of files
+               if ($realline == $checklicenseline) {
+                       if ($rawline =~ /^[ \+]\s*\#\!\s*\//) {
+                               $checklicenseline = 2;
+                       } elsif ($rawline =~ /^\+/) {
+                               my $comment = "";
+                               if ($realfile =~ /\.(h|s|S)$/) {
+                                       $comment = '/*';
+                               } elsif ($realfile =~ /\.(c|dts|dtsi)$/) {
+                                       $comment = '//';
+                               } elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc)$/) {
+                                       $comment = '#';
+                               } elsif ($realfile =~ /\.rst$/) {
+                                       $comment = '..';
+                               }
+
+                               if ($comment !~ /^$/ &&
+                                   $rawline !~ /^\+\Q$comment\E SPDX-License-Identifier: /) {
+                                       WARN("SPDX_LICENSE_TAG",
+                                            "Missing or malformed SPDX-License-Identifier tag in line $checklicenseline\n" . $herecurr);
+                               }
+                       }
+               }
+
 # check we are in a valid source file if not then ignore this hunk
-               next if ($realfile !~ /\.(h|c|s|S|pl|sh|dtsi|dts)$/);
+               next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
 
 # line length limit (with some exclusions)
 #
@@ -2646,9 +2993,10 @@ sub process {
 #      logging functions like pr_info that end in a string
 #      lines with a single string
 #      #defines that are a single string
+#      lines with an RFC3986 like URL
 #
 # There are 3 different line length message types:
-# LONG_LINE_COMMENT    a comment starts before but extends beyond $max_linelength
+# LONG_LINE_COMMENT    a comment starts before but extends beyond $max_line_length
 # LONG_LINE_STRING     a string starts before but extends beyond $max_line_length
 # LONG_LINE            all other lines longer than $max_line_length
 #
@@ -2672,6 +3020,15 @@ sub process {
                                 $line =~ /^\+\s*#\s*define\s+\w+\s+$String$/) {
                                $msg_type = "";
 
+                       # More special cases
+                       } elsif ($line =~ /^\+.*\bEFI_GUID\s*\(/ ||
+                                $line =~ /^\+\s*(?:\w+)?\s*DEFINE_PER_CPU/) {
+                               $msg_type = "";
+
+                       # URL ($rawline is used in case the URL is in a comment)
+                       } elsif ($rawline =~ /^\+.*\b[a-z][\w\.\+\-]*:\/\/\S+/i) {
+                               $msg_type = "";
+
                        # Otherwise set the alternate message types
 
                        # a comment starts before $max_line_length
@@ -2698,20 +3055,6 @@ sub process {
                             "adding a line without newline at end of file\n" . $herecurr);
                }
 
-# Blackfin: use hi/lo macros
-               if ($realfile =~ m@arch/blackfin/.*\.S$@) {
-                       if ($line =~ /\.[lL][[:space:]]*=.*&[[:space:]]*0x[fF][fF][fF][fF]/) {
-                               my $herevet = "$here\n" . cat_vet($line) . "\n";
-                               ERROR("LO_MACRO",
-                                     "use the LO() macro, not (... & 0xFFFF)\n" . $herevet);
-                       }
-                       if ($line =~ /\.[hH][[:space:]]*=.*>>[[:space:]]*16/) {
-                               my $herevet = "$here\n" . cat_vet($line) . "\n";
-                               ERROR("HI_MACRO",
-                                     "use the HI() macro, not (... >> 16)\n" . $herevet);
-                       }
-               }
-
 # check we are in a valid source file C or perl if not then ignore this hunk
                next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/);
 
@@ -2741,15 +3084,34 @@ sub process {
                        }
                }
 
+# check for assignments on the start of a line
+               if ($sline =~ /^\+\s+($Assignment)[^=]/) {
+                       CHK("ASSIGNMENT_CONTINUATIONS",
+                           "Assignment operator '$1' should be on the previous line\n" . $hereprev);
+               }
+
 # check for && or || at the start of a line
                if ($rawline =~ /^\+\s*(&&|\|\|)/) {
                        CHK("LOGICAL_CONTINUATIONS",
                            "Logical continuations should be on the previous line\n" . $hereprev);
                }
 
+# check indentation starts on a tab stop
+               if ($^V && $^V ge 5.10.0 &&
+                   $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) {
+                       my $indent = length($1);
+                       if ($indent % 8) {
+                               if (WARN("TABSTOP",
+                                        "Statements should start on a tabstop\n" . $herecurr) &&
+                                   $fix) {
+                                       $fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/8)@e;
+                               }
+                       }
+               }
+
 # check multi-line statement indentation matches previous line
                if ($^V && $^V ge 5.10.0 &&
-                   $prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|$Ident\s*=\s*$Ident\s*)\(.*(\&\&|\|\||,)\s*$/) {
+                   $prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|(?:\*\s*)*$Lval\s*=\s*$Ident\s*)\(.*(\&\&|\|\||,)\s*$/) {
                        $prevline =~ /^\+(\t*)(.*)$/;
                        my $oldindent = $1;
                        my $rest = $2;
@@ -2823,6 +3185,30 @@ sub process {
 #                           "Block comments use a trailing */ on a separate line\n" . $herecurr);
 #              }
 
+# Block comment * alignment
+               if ($prevline =~ /$;[ \t]*$/ &&                 #ends in comment
+                   $line =~ /^\+[ \t]*$;/ &&                   #leading comment
+                   $rawline =~ /^\+[ \t]*\*/ &&                #leading *
+                   (($prevrawline =~ /^\+.*?\/\*/ &&           #leading /*
+                     $prevrawline !~ /\*\/[ \t]*$/) ||         #no trailing */
+                    $prevrawline =~ /^\+[ \t]*\*/)) {          #leading *
+                       my $oldindent;
+                       $prevrawline =~ m@^\+([ \t]*/?)\*@;
+                       if (defined($1)) {
+                               $oldindent = expand_tabs($1);
+                       } else {
+                               $prevrawline =~ m@^\+(.*/?)\*@;
+                               $oldindent = expand_tabs($1);
+                       }
+                       $rawline =~ m@^\+([ \t]*)\*@;
+                       my $newindent = $1;
+                       $newindent = expand_tabs($newindent);
+                       if (length($oldindent) ne length($newindent)) {
+                               WARN("BLOCK_COMMENT_STYLE",
+                                    "Block comments should align the * on each line\n" . $hereprev);
+                       }
+               }
+
 # check for missing blank lines after struct/union declarations
 # with exceptions for various attributes and macros
                if ($prevline =~ /^[\+ ]};?\s*$/ &&
@@ -2834,6 +3220,7 @@ sub process {
                      $line =~ /^\+[a-z_]*init/ ||
                      $line =~ /^\+\s*(?:static\s+)?[A-Z_]*ATTR/ ||
                      $line =~ /^\+\s*DECLARE/ ||
+                     $line =~ /^\+\s*builtin_[\w_]*driver/ ||
                      $line =~ /^\+\s*__setup/)) {
                        if (CHK("LINE_SPACING",
                                "Please use a blank line after function/struct/union/enum declarations\n" . $hereprev) &&
@@ -2913,6 +3300,23 @@ sub process {
 # check we are in a valid C source file if not then ignore this hunk
                next if ($realfile !~ /\.(h|c)$/);
 
+# check for unusual line ending [ or (
+               if ($line =~ /^\+.*([\[\(])\s*$/) {
+                       CHK("OPEN_ENDED_LINE",
+                           "Lines should not end with a '$1'\n" . $herecurr);
+               }
+
+# check if this appears to be the start function declaration, save the name
+               if ($sline =~ /^\+\{\s*$/ &&
+                   $prevline =~ /^\+(?:(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*)?($Ident)\(/) {
+                       $context_function = $1;
+               }
+
+# check if this appears to be the end of function declaration
+               if ($sline =~ /^\+\}\s*$/) {
+                       undef $context_function;
+               }
+
 # check indentation of any line with a bare else
 # (but not if it is a multiple line "if (foo) return bar; else return baz;")
 # if the previous line is a break or return and is indented 1 tab more...
@@ -2937,30 +3341,12 @@ sub process {
                        }
                }
 
-# discourage the addition of CONFIG_EXPERIMENTAL in #if(def).
-               if ($line =~ /^\+\s*\#\s*if.*\bCONFIG_EXPERIMENTAL\b/) {
-                       WARN("CONFIG_EXPERIMENTAL",
-                            "Use of CONFIG_EXPERIMENTAL is deprecated. For alternatives, see https://lkml.org/lkml/2012/10/23/580\n");
-               }
-
 # check for RCS/CVS revision markers
                if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
                        WARN("CVS_KEYWORD",
                             "CVS style keyword markers, these will _not_ be updated\n". $herecurr);
                }
 
-# Blackfin: don't use __builtin_bfin_[cs]sync
-               if ($line =~ /__builtin_bfin_csync/) {
-                       my $herevet = "$here\n" . cat_vet($line) . "\n";
-                       ERROR("CSYNC",
-                             "use the CSYNC() macro in asm/blackfin.h\n" . $herevet);
-               }
-               if ($line =~ /__builtin_bfin_ssync/) {
-                       my $herevet = "$here\n" . cat_vet($line) . "\n";
-                       ERROR("SSYNC",
-                             "use the SSYNC() macro in asm/blackfin.h\n" . $herevet);
-               }
-
 # check for old HOTPLUG __dev<foo> section markings
                if ($line =~ /\b(__dev(init|exit)(data|const|))\b/) {
                        WARN("HOTPLUG_SECTION",
@@ -2971,7 +3357,7 @@ sub process {
                my ($stat, $cond, $line_nr_next, $remain_next, $off_next,
                    $realline_next);
 #print "LINE<$line>\n";
-               if ($linenr >= $suppress_statement &&
+               if ($linenr > $suppress_statement &&
                    $realcnt && $sline =~ /.\s*\S/) {
                        ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
                                ctx_statement_block($linenr, $realcnt, 0);
@@ -3118,7 +3504,7 @@ sub process {
                }
 
 # Check relative indent for conditionals and blocks.
-               if ($line =~ /\b(?:(?:if|while|for|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
+               if ($line =~ /\b(?:(?:if|while|for|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|(?:do|else)\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
                        ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
                                ctx_statement_block($linenr, $realcnt, 0)
                                        if (!defined $stat);
@@ -3210,6 +3596,8 @@ sub process {
                        if ($check && $s ne '' &&
                            (($sindent % $tab_length) != 0 ||
                             ($sindent < $indent) ||
+                            ($sindent == $indent &&
+                             ($s !~ /^\s*(?:\}|\{|else\b)/)) ||
                             ($sindent > $indent + $tab_length))) {
                                WARN("SUSPECT_CODE_INDENT",
                                     "suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
@@ -3232,6 +3620,42 @@ sub process {
 #ignore lines not being added
                next if ($line =~ /^[^\+]/);
 
+# check for dereferences that span multiple lines
+               if ($prevline =~ /^\+.*$Lval\s*(?:\.|->)\s*$/ &&
+                   $line =~ /^\+\s*(?!\#\s*(?!define\s+|if))\s*$Lval/) {
+                       $prevline =~ /($Lval\s*(?:\.|->))\s*$/;
+                       my $ref = $1;
+                       $line =~ /^.\s*($Lval)/;
+                       $ref .= $1;
+                       $ref =~ s/\s//g;
+                       WARN("MULTILINE_DEREFERENCE",
+                            "Avoid multiple line dereference - prefer '$ref'\n" . $hereprev);
+               }
+
+# check for declarations of signed or unsigned without int
+               while ($line =~ m{\b($Declare)\s*(?!char\b|short\b|int\b|long\b)\s*($Ident)?\s*[=,;\[\)\(]}g) {
+                       my $type = $1;
+                       my $var = $2;
+                       $var = "" if (!defined $var);
+                       if ($type =~ /^(?:(?:$Storage|$Inline|$Attribute)\s+)*((?:un)?signed)((?:\s*\*)*)\s*$/) {
+                               my $sign = $1;
+                               my $pointer = $2;
+
+                               $pointer = "" if (!defined $pointer);
+
+                               if (WARN("UNSPECIFIED_INT",
+                                        "Prefer '" . trim($sign) . " int" . rtrim($pointer) . "' to bare use of '$sign" . rtrim($pointer) . "'\n" . $herecurr) &&
+                                   $fix) {
+                                       my $decl = trim($sign) . " int ";
+                                       my $comp_pointer = $pointer;
+                                       $comp_pointer =~ s/\s//g;
+                                       $decl .= $comp_pointer;
+                                       $decl = rtrim($decl) if ($var eq "");
+                                       $fixed[$fixlinenr] =~ s@\b$sign\s*\Q$pointer\E\s*$var\b@$decl$var@;
+                               }
+                       }
+               }
+
 # TEST: allow direct testing of the type matcher.
                if ($dbg_type) {
                        if ($line =~ /^.\s*$Declare\s*$/) {
@@ -3267,7 +3691,7 @@ sub process {
                                $fixedline =~ s/\s*=\s*$/ = {/;
                                fix_insert_line($fixlinenr, $fixedline);
                                $fixedline = $line;
-                               $fixedline =~ s/^(.\s*){\s*/$1/;
+                               $fixedline =~ s/^(.\s*)\{\s*/$1/;
                                fix_insert_line($fixlinenr, $fixedline);
                        }
                }
@@ -3351,21 +3775,20 @@ sub process {
                }
 
 # check for global initialisers.
-               if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*(?:0|NULL|false)\s*;/) {
+               if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/) {
                        if (ERROR("GLOBAL_INITIALISERS",
-                                 "do not initialise globals to 0 or NULL\n" .
-                                     $herecurr) &&
+                                 "do not initialise globals to $1\n" . $herecurr) &&
                            $fix) {
-                               $fixed[$fixlinenr] =~ s/(^.$Type\s*$Ident(?:\s+$Modifier)*)\s*=\s*(0|NULL|false)\s*;/$1;/;
+                               $fixed[$fixlinenr] =~ s/(^.$Type\s*$Ident(?:\s+$Modifier)*)\s*=\s*$zero_initializer\s*;/$1;/;
                        }
                }
 # check for static initialisers.
-               if ($line =~ /^\+.*\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
+               if ($line =~ /^\+.*\bstatic\s.*=\s*($zero_initializer)\s*;/) {
                        if (ERROR("INITIALISED_STATIC",
-                                 "do not initialise statics to 0 or NULL\n" .
+                                 "do not initialise statics to $1\n" .
                                      $herecurr) &&
                            $fix) {
-                               $fixed[$fixlinenr] =~ s/(\bstatic\s.*?)\s*=\s*(0|NULL|false)\s*;/$1;/;
+                               $fixed[$fixlinenr] =~ s/(\bstatic\s.*?)\s*=\s*$zero_initializer\s*;/$1;/;
                        }
                }
 
@@ -3431,22 +3854,13 @@ sub process {
                        }
                }
 
-# check for uses of DEFINE_PCI_DEVICE_TABLE
-               if ($line =~ /\bDEFINE_PCI_DEVICE_TABLE\s*\(\s*(\w+)\s*\)\s*=/) {
-                       if (WARN("DEFINE_PCI_DEVICE_TABLE",
-                                "Prefer struct pci_device_id over deprecated DEFINE_PCI_DEVICE_TABLE\n" . $herecurr) &&
-                           $fix) {
-                               $fixed[$fixlinenr] =~ s/\b(?:static\s+|)DEFINE_PCI_DEVICE_TABLE\s*\(\s*(\w+)\s*\)\s*=\s*/static const struct pci_device_id $1\[\] = /;
-                       }
-               }
-
 # check for new typedefs, only function parameters and sparse annotations
 # make sense.
                if ($line =~ /\btypedef\s/ &&
                    $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
                    $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
                    $line !~ /\b$typeTypedefs\b/ &&
-                   $line !~ /\b__bitwise(?:__|)\b/) {
+                   $line !~ /\b__bitwise\b/) {
                        WARN("NEW_TYPEDEFS",
                             "do not add new typedefs\n" . $herecurr);
                }
@@ -3510,10 +3924,10 @@ sub process {
 
 # avoid BUG() or BUG_ON()
                if ($line =~ /\b(?:BUG|BUG_ON)\b/) {
-                       my $msg_type = \&WARN;
-                       $msg_type = \&CHK if ($file);
-                       &{$msg_type}("AVOID_BUG",
-                                    "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr);
+                       my $msg_level = \&WARN;
+                       $msg_level = \&CHK if ($file);
+                       &{$msg_level}("AVOID_BUG",
+                                     "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr);
                }
 
 # avoid LINUX_VERSION_CODE
@@ -3528,28 +3942,10 @@ sub process {
                             "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
-## 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 preceding printk's which have no newline on the end.
-## we assume the first bad printk is the one to report.
-#              if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
-#                      my $ok = 0;
-#                      for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
-#                              #print "CHECK<$lines[$ln - 1]\n";
-#                              # we have a preceding printk if it ends
-#                              # with "\n" ignore it, else it is to blame
-#                              if ($lines[$ln - 1] =~ m{\bprintk\(}) {
-#                                      if ($rawlines[$ln - 1] !~ m{\\n"}) {
-#                                              $ok = 1;
-#                                      }
-#                                      last;
-#                              }
-#                      }
-#                      if ($ok == 0) {
-#                              WARN("PRINTK_WITHOUT_KERN_LEVEL",
-#                                   "printk() should include KERN_ facility level\n" . $herecurr);
-#                      }
+## printk should use KERN_* levels
+#              if ($line =~ /\bprintk\s*\(\s*(?!KERN_[A-Z]+\b)/) {
+#                      WARN("PRINTK_WITHOUT_KERN_LEVEL",
+#                           "printk() should include KERN_<LEVEL> facility level\n" . $herecurr);
 #              }
 #
 #              if ($line =~ /\bprintk\s*\(\s*KERN_([A-Z]+)/) {
@@ -3590,10 +3986,12 @@ sub process {
 
 # function brace can't be on same line, except for #defines of do while,
 # or if closed on same line
-               if (($line=~/$Type\s*$Ident\(.*\).*\s*{/) and
-                   !($line=~/\#\s*define.*do\s\{/) and !($line=~/}/)) {
+               if ($^V && $^V ge 5.10.0 &&
+                   $sline =~ /$Type\s*$Ident\s*$balanced_parens\s*\{/ &&
+                   $sline !~ /\#\s*define\b.*do\s*\{/ &&
+                   $sline !~ /}/) {
                        if (ERROR("OPEN_BRACE",
-                                 "open brace '{' following function declarations go on the next line\n" . $herecurr) &&
+                                 "open brace '{' following function definitions go on the next line\n" . $herecurr) &&
                            $fix) {
                                fix_delete_line($fixlinenr, $rawline);
                                my $fixed_line = $rawline;
@@ -3619,7 +4017,7 @@ sub process {
                                my $fixedline = rtrim($prevrawline) . " {";
                                fix_insert_line($fixlinenr, $fixedline);
                                $fixedline = $rawline;
-                               $fixedline =~ s/^(.\s*){\s*/$1\t/;
+                               $fixedline =~ s/^(.\s*)\{\s*/$1\t/;
                                if ($fixedline !~ /^\+\s*$/) {
                                        fix_insert_line($fixlinenr, $fixedline);
                                }
@@ -3714,7 +4112,7 @@ sub process {
                        my ($where, $prefix) = ($-[1], $1);
                        if ($prefix !~ /$Type\s+$/ &&
                            ($where != 0 || $prefix !~ /^.\s+$/) &&
-                           $prefix !~ /[{,]\s+$/) {
+                           $prefix !~ /[{,:]\s+$/) {
                                if (ERROR("BRACKET_SPACE",
                                          "space prohibited before open square bracket '['\n" . $herecurr) &&
                                    $fix) {
@@ -4039,11 +4437,11 @@ sub process {
 
                                        # messages are ERROR, but ?: are CHK
                                        if ($ok == 0) {
-                                               my $msg_type = \&ERROR;
-                                               $msg_type = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
+                                               my $msg_level = \&ERROR;
+                                               $msg_level = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
 
-                                               if (&{$msg_type}("SPACING",
-                                                                "spaces required around that '$op' $at\n" . $hereptr)) {
+                                               if (&{$msg_level}("SPACING",
+                                                                 "spaces required around that '$op' $at\n" . $hereptr)) {
                                                        $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
                                                        if (defined $fix_elements[$n + 2]) {
                                                                $fix_elements[$n + 2] =~ s/^\s+//;
@@ -4103,12 +4501,12 @@ sub process {
 ##             }
 
 #need space before brace following if, while, etc
-               if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\){/) ||
+               if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) ||
                    $line =~ /do\{/) {
                        if (ERROR("SPACING",
                                  "space required before the open brace '{'\n" . $herecurr) &&
                            $fix) {
-                               $fixed[$fixlinenr] =~ s/^(\+.*(?:do|\))){/$1 {/;
+                               $fixed[$fixlinenr] =~ s/^(\+.*(?:do|\)))\{/$1 {/;
                        }
                }
 
@@ -4196,6 +4594,32 @@ sub process {
                        }
                }
 
+# check for unnecessary parentheses around comparisons in if uses
+# when !drivers/staging or command-line uses --strict
+               if (($realfile !~ m@^(?:drivers/staging/)@ || $check_orig) &&
+                   $^V && $^V ge 5.10.0 && defined($stat) &&
+                   $stat =~ /(^.\s*if\s*($balanced_parens))/) {
+                       my $if_stat = $1;
+                       my $test = substr($2, 1, -1);
+                       my $herectx;
+                       while ($test =~ /(?:^|[^\w\&\!\~])+\s*\(\s*([\&\!\~]?\s*$Lval\s*(?:$Compare\s*$FuncArg)?)\s*\)/g) {
+                               my $match = $1;
+                               # avoid parentheses around potential macro args
+                               next if ($match =~ /^\s*\w+\s*$/);
+                               if (!defined($herectx)) {
+                                       $herectx = $here . "\n";
+                                       my $cnt = statement_rawlines($if_stat);
+                                       for (my $n = 0; $n < $cnt; $n++) {
+                                               my $rl = raw_line($linenr, $n);
+                                               $herectx .=  $rl . "\n";
+                                               last if $rl =~ /^[ \+].*\{/;
+                                       }
+                               }
+                               CHK("UNNECESSARY_PARENTHESES",
+                                   "Unnecessary parentheses around '$match'\n" . $herectx);
+                       }
+               }
+
 #goto labels aren't indented, allow a single space however
                if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
                   !($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
@@ -4261,7 +4685,7 @@ sub process {
                        my $comp = $3;
                        my $to = $4;
                        my $newcomp = $comp;
-                       if ($lead !~ /$Operators\s*$/ &&
+                       if ($lead !~ /(?:$Operators|\.)\s*$/ &&
                            $to !~ /^(?:Constant|[A-Z_][A-Z0-9_]*)$/ &&
                            WARN("CONSTANT_COMPARISON",
                                 "Comparisons should place the constant on the right side of the test\n" . $herecurr) &&
@@ -4534,9 +4958,19 @@ sub process {
                        #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
 
                        $has_flow_statement = 1 if ($ctx =~ /\b(goto|return)\b/);
-                       $has_arg_concat = 1 if ($ctx =~ /\#\#/);
+                       $has_arg_concat = 1 if ($ctx =~ /\#\#/ && $ctx !~ /\#\#\s*(?:__VA_ARGS__|args)\b/);
+
+                       $dstat =~ s/^.\s*\#\s*define\s+$Ident(\([^\)]*\))?\s*//;
+                       my $define_args = $1;
+                       my $define_stmt = $dstat;
+                       my @def_args = ();
+
+                       if (defined $define_args && $define_args ne "") {
+                               $define_args = substr($define_args, 1, length($define_args) - 2);
+                               $define_args =~ s/\s*//g;
+                               @def_args = split(",", $define_args);
+                       }
 
-                       $dstat =~ s/^.\s*\#\s*define\s+$Ident(?:\([^\)]*\))?\s*//;
                        $dstat =~ s/$;//g;
                        $dstat =~ s/\\\n.//g;
                        $dstat =~ s/^\s*//s;
@@ -4545,7 +4979,7 @@ sub process {
                        # Flatten any parentheses and braces
                        while ($dstat =~ s/\([^\(\)]*\)/1/ ||
                               $dstat =~ s/\{[^\{\}]*\}/1/ ||
-                              $dstat =~ s/\[[^\[\]]*\]/1/)
+                              $dstat =~ s/.\[[^\[\]]*\]/1/)
                        {
                        }
 
@@ -4555,6 +4989,9 @@ sub process {
                        {
                        }
 
+                       # Make asm volatile uses seem like a generic function
+                       $dstat =~ s/\b_*asm_*\s+_*volatile_*\b/asm_volatile/g;
+
                        my $exceptions = qr{
                                $Declare|
                                module_param_named|
@@ -4565,9 +5002,15 @@ sub process {
                                union|
                                struct|
                                \.$Ident\s*=\s*|
-                               ^\"|\"$
+                               ^\"|\"$|
+                               ^\[
                        }x;
                        #print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";
+
+                       $ctx =~ s/\n*$//;
+                       my $stmt_cnt = statement_rawlines($ctx);
+                       my $herectx = get_stat_here($linenr, $stmt_cnt, $here);
+
                        if ($dstat ne '' &&
                            $dstat !~ /^(?:$Ident|-?$Constant),$/ &&                    # 10, // foo(),
                            $dstat !~ /^(?:$Ident|-?$Constant);$/ &&                    # foo();
@@ -4583,32 +5026,64 @@ sub process {
                            $dstat !~ /^\(\{/ &&                                                # ({...
                            $ctx !~ /^.\s*#\s*define\s+TRACE_(?:SYSTEM|INCLUDE_FILE|INCLUDE_PATH)\b/)
                        {
-                               $ctx =~ s/\n*$//;
-                               my $herectx = $here . "\n";
-                               my $cnt = statement_rawlines($ctx);
-
-                               for (my $n = 0; $n < $cnt; $n++) {
-                                       $herectx .= raw_line($linenr, $n) . "\n";
-                               }
-
-                               if ($dstat =~ /;/) {
+                               if ($dstat =~ /^\s*if\b/) {
+                                       ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
+                                             "Macros starting with if should be enclosed by a do - while loop to avoid possible if/else logic defects\n" . "$herectx");
+                               } elsif ($dstat =~ /;/) {
                                        ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
                                              "Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx");
                                } else {
                                        ERROR("COMPLEX_MACRO",
                                              "Macros with complex values should be enclosed in parentheses\n" . "$herectx");
                                }
+
+                       }
+
+                       # Make $define_stmt single line, comment-free, etc
+                       my @stmt_array = split('\n', $define_stmt);
+                       my $first = 1;
+                       $define_stmt = "";
+                       foreach my $l (@stmt_array) {
+                               $l =~ s/\\$//;
+                               if ($first) {
+                                       $define_stmt = $l;
+                                       $first = 0;
+                               } elsif ($l =~ /^[\+ ]/) {
+                                       $define_stmt .= substr($l, 1);
+                               }
+                       }
+                       $define_stmt =~ s/$;//g;
+                       $define_stmt =~ s/\s+/ /g;
+                       $define_stmt = trim($define_stmt);
+
+# check if any macro arguments are reused (ignore '...' and 'type')
+                       foreach my $arg (@def_args) {
+                               next if ($arg =~ /\.\.\./);
+                               next if ($arg =~ /^type$/i);
+                               my $tmp_stmt = $define_stmt;
+                               $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;
+                               if ($use_cnt > 1) {
+                                       CHK("MACRO_ARG_REUSE",
+                                           "Macro argument reuse '$arg' - possible side-effects?\n" . "$herectx");
+                                   }
+# check if any macro arguments may have other precedence issues
+                               if ($tmp_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m &&
+                                   ((defined($1) && $1 ne ',') ||
+                                    (defined($2) && $2 ne ','))) {
+                                       CHK("MACRO_ARG_PRECEDENCE",
+                                           "Macro argument '$arg' may be better as '($arg)' to avoid precedence issues\n" . "$herectx");
+                               }
                        }
 
 # check for macros with flow control, but without ## concatenation
 # ## concatenation is commonly a macro that defines a function so ignore those
                        if ($has_flow_statement && !$has_arg_concat) {
-                               my $herectx = $here . "\n";
                                my $cnt = statement_rawlines($ctx);
+                               my $herectx = get_stat_here($linenr, $cnt, $here);
 
-                               for (my $n = 0; $n < $cnt; $n++) {
-                                       $herectx .= raw_line($linenr, $n) . "\n";
-                               }
                                WARN("MACRO_WITH_FLOW_CONTROL",
                                     "Macros with flow control statements should be avoided\n" . "$herectx");
                        }
@@ -4648,11 +5123,7 @@ sub process {
 
                                $ctx =~ s/\n*$//;
                                my $cnt = statement_rawlines($ctx);
-                               my $herectx = $here . "\n";
-
-                               for (my $n = 0; $n < $cnt; $n++) {
-                                       $herectx .= raw_line($linenr, $n) . "\n";
-                               }
+                               my $herectx = get_stat_here($linenr, $cnt, $here);
 
                                if (($stmts =~ tr/;/;/) == 1 &&
                                    $stmts !~ /^\s*(if|while|for|switch)\b/) {
@@ -4666,27 +5137,13 @@ sub process {
                        } elsif ($dstat =~ /^\+\s*#\s*define\s+$Ident.*;\s*$/) {
                                $ctx =~ s/\n*$//;
                                my $cnt = statement_rawlines($ctx);
-                               my $herectx = $here . "\n";
-
-                               for (my $n = 0; $n < $cnt; $n++) {
-                                       $herectx .= raw_line($linenr, $n) . "\n";
-                               }
+                               my $herectx = get_stat_here($linenr, $cnt, $here);
 
                                WARN("TRAILING_SEMICOLON",
                                     "macros should not use a trailing semicolon\n" . "$herectx");
                        }
                }
 
-# make sure symbols are always wrapped with VMLINUX_SYMBOL() ...
-# all assignments may have only one of the following with an assignment:
-#      .
-#      ALIGN(...)
-#      VMLINUX_SYMBOL(...)
-               if ($realfile eq 'vmlinux.lds.h' && $line =~ /(?:(?:^|\s)$Ident\s*=|=\s*$Ident(?:\s|$))/) {
-                       WARN("MISSING_VMLINUX_SYMBOL",
-                            "vmlinux.lds.h needs VMLINUX_SYMBOL() around C-visible symbols\n" . $herecurr);
-               }
-
 # check for redundant bracing round if etc
                if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
                        my ($level, $endln, @chunks) =
@@ -4793,18 +5250,20 @@ sub process {
                                }
                        }
                        if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
-                               my $herectx = $here . "\n";
                                my $cnt = statement_rawlines($block);
-
-                               for (my $n = 0; $n < $cnt; $n++) {
-                                       $herectx .= raw_line($linenr, $n) . "\n";
-                               }
+                               my $herectx = get_stat_here($linenr, $cnt, $here);
 
                                WARN("BRACES",
                                     "braces {} are not necessary for single statement blocks\n" . $herectx);
                        }
                }
 
+# check for single line unbalanced braces
+               if ($sline =~ /^.\s*\}\s*else\s*$/ ||
+                   $sline =~ /^.\s*else\s*\{\s*$/) {
+                       CHK("BRACES", "Unbalanced braces around else statement\n" . $herecurr);
+               }
+
 # check for unnecessary blank lines around braces
                if (($line =~ /^.\s*}\s*$/ && $prevrawline =~ /^.\s*$/)) {
                        if (CHK("BRACES",
@@ -4825,7 +5284,7 @@ sub process {
                my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
                if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
                        WARN("VOLATILE",
-                            "Use of volatile is usually wrong: see Documentation/volatile-considered-harmful.txt\n" . $herecurr);
+                            "Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst\n" . $herecurr);
                }
 
 # Check for user-visible strings broken across lines, which breaks the ability
@@ -4867,6 +5326,18 @@ sub process {
                             "break quoted strings at a space character\n" . $hereprev);
                }
 
+# check for an embedded function name in a string when the function is known
+# This does not work very well for -f --file checking as it depends on patch
+# context providing the function name or a single line form for in-file
+# function declarations
+               if ($line =~ /^\+.*$String/ &&
+                   defined($context_function) &&
+                   get_quoted_string($line, $rawline) =~ /\b$context_function\b/ &&
+                   length(get_quoted_string($line, $rawline)) != (length($context_function) + 2)) {
+                       WARN("EMBEDDED_FUNCTION_NAME",
+                            "Prefer using '\"%s...\", __func__' to using '$context_function', this function's name, in a string\n" . $herecurr);
+               }
+
 # check for spaces before a quoted newline
                if ($rawline =~ /^.*\".*\s\\n/) {
                        if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE",
@@ -4889,24 +5360,33 @@ sub process {
                             "Consecutive strings are generally better as a single string\n" . $herecurr);
                }
 
-# check for %L{u,d,i} and 0x%[udi] in strings
-               my $string;
+# check for non-standard and hex prefixed decimal printf formats
+               my $show_L = 1; #don't show the same defect twice
+               my $show_Z = 1;
                while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
-                       $string = substr($rawline, $-[1], $+[1] - $-[1]);
+                       my $string = substr($rawline, $-[1], $+[1] - $-[1]);
                        $string =~ s/%%/__/g;
-                       if ($string =~ /(?<!%)%[\*\d\.\$]*L[udi]/) {
+                       # check for %L
+                       if ($show_L && $string =~ /%[\*\d\.\$]*L([diouxX])/) {
                                WARN("PRINTF_L",
-                                    "\%Ld/%Lu are not-standard C, use %lld/%llu\n" . $herecurr);
-                               last;
-                       }
-                       if ($string =~ /0x%[\*\d\.\$\Llzth]*[udi]/) {
-                               ERROR("PRINTF_0xDECIMAL",
+                                    "\%L$1 is non-standard C, use %ll$1\n" . $herecurr);
+                               $show_L = 0;
+                       }
+                       # check for %Z
+                       if ($show_Z && $string =~ /%[\*\d\.\$]*Z([diouxX])/) {
+                               WARN("PRINTF_Z",
+                                    "%Z$1 is non-standard C, use %z$1\n" . $herecurr);
+                               $show_Z = 0;
+                       }
+                       # check for 0x<decimal>
+                       if ($string =~ /0x%[\*\d\.\$\Llzth]*[diou]/) {
+                               ERROR("PRINTF_0XDECIMAL",
                                      "Prefixing 0x with decimal output is defective\n" . $herecurr);
                        }
                }
 
 # check for line continuations in quoted strings with odd counts of "
-               if ($rawline =~ /\\$/ && $rawline =~ tr/"/"/ % 2) {
+               if ($rawline =~ /\\$/ && $sline =~ tr/"/"/ % 2) {
                        WARN("LINE_CONTINUATIONS",
                             "Avoid line continuations in quoted strings\n" . $herecurr);
                }
@@ -4962,7 +5442,7 @@ sub process {
                        my ($s, $c) = ctx_statement_block($linenr - 3, $realcnt, 0);
 #                      print("line: <$line>\nprevline: <$prevline>\ns: <$s>\nc: <$c>\n\n\n");
 
-                       if ($c =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*(?:devm_)?(?:[kv][czm]alloc(?:_node|_array)?\b|kstrdup|(?:dev_)?alloc_skb)/) {
+                       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);
                        }
@@ -4979,6 +5459,12 @@ sub process {
                        }
                }
 
+# check for logging continuations
+               if ($line =~ /\bprintk\s*\(\s*KERN_CONT\b|\bpr_cont\s*\(/) {
+                       WARN("LOGGING_CONTINUATION",
+                            "Avoid logging continuation uses where feasible\n" . $herecurr);
+               }
+
 # check for mask then right shift without a parentheses
                if ($^V && $^V ge 5.10.0 &&
                    $line =~ /$LvalOrFunc\s*\&\s*($LvalOrFunc)\s*>>/ &&
@@ -5133,13 +5619,44 @@ sub process {
                        }
                }
 # check for memory barriers without a comment.
-               if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
+
+               my $barriers = qr{
+                       mb|
+                       rmb|
+                       wmb|
+                       read_barrier_depends
+               }x;
+               my $barrier_stems = qr{
+                       mb__before_atomic|
+                       mb__after_atomic|
+                       store_release|
+                       load_acquire|
+                       store_mb|
+                       (?:$barriers)
+               }x;
+               my $all_barriers = qr{
+                       (?:$barriers)|
+                       smp_(?:$barrier_stems)|
+                       virt_(?:$barrier_stems)
+               }x;
+
+               if ($line =~ /\b(?:$all_barriers)\s*\(/) {
                        if (!ctx_has_comment($first_line, $linenr)) {
                                WARN("MEMORY_BARRIER",
                                     "memory barrier without comment\n" . $herecurr);
                        }
                }
 
+               my $underscore_smp_barriers = qr{__smp_(?:$barrier_stems)}x;
+
+               if ($realfile !~ m@^include/asm-generic/@ &&
+                   $realfile !~ m@/barrier\.h$@ &&
+                   $line =~ m/\b(?:$underscore_smp_barriers)\s*\(/ &&
+                   $line !~ m/^.\s*\#\s*define\s+(?:$underscore_smp_barriers)\s*\(/) {
+                       WARN("MEMORY_BARRIER",
+                            "__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . $herecurr);
+               }
+
 # check for waitqueue_active without a comment.
                if ($line =~ /\bwaitqueue_active\s*\(/) {
                        if (!ctx_has_comment($first_line, $linenr)) {
@@ -5148,21 +5665,10 @@ sub process {
                        }
                }
 
-# Check for expedited grace periods that interrupt non-idle non-nohz
-# online CPUs.  These expedited can therefore degrade real-time response
-# if used carelessly, and should be avoided where not absolutely
-# needed.  It is always OK to use synchronize_rcu_expedited() and
-# synchronize_sched_expedited() at boot time (before real-time applications
-# start) and in error situations where real-time response is compromised in
-# any case.  Note that synchronize_srcu_expedited() does -not- interrupt
-# other CPUs, so don't warn on uses of synchronize_srcu_expedited().
-# Of course, nothing comes for free, and srcu_read_lock() and
-# srcu_read_unlock() do contain full memory barriers in payment for
-# synchronize_srcu_expedited() non-interruption properties.
-               if ($line =~ /\b(synchronize_rcu_expedited|synchronize_sched_expedited)\(/) {
-                       WARN("EXPEDITED_RCU_GRACE_PERIOD",
-                            "expedited RCU grace periods should be avoided where they can degrade real-time response\n" . $herecurr);
-
+# check for smp_read_barrier_depends and read_barrier_depends
+               if (!$file && $line =~ /\b(smp_|)read_barrier_depends\s*\(/) {
+                       WARN("READ_BARRIER_DEPENDS",
+                            "$1read_barrier_depends should only be used in READ_ONCE or DEC Alpha code\n" . $herecurr);
                }
 
 # check of hardware specific defines
@@ -5171,10 +5677,18 @@ sub process {
                            "architecture specific defines should be avoided\n" .  $herecurr);
                }
 
+# check that the storage class is not after a type
+               if ($line =~ /\b($Type)\s+($Storage)\b/) {
+                       WARN("STORAGE_CLASS",
+                            "storage class '$2' should be located before type '$1'\n" . $herecurr);
+               }
 # Check that the storage class is at the beginning of a declaration
-               if ($line =~ /\b$Storage\b/ && $line !~ /^.\s*$Storage\b/) {
+               if ($line =~ /\b$Storage\b/ &&
+                   $line !~ /^.\s*$Storage/ &&
+                   $line =~ /^.\s*(.+?)\$Storage\s/ &&
+                   $1 !~ /[\,\)]\s*$/) {
                        WARN("STORAGE_CLASS",
-                            "storage class should be at the beginning of the declaration\n" . $herecurr)
+                            "storage class should be at the beginning of the declaration\n" . $herecurr);
                }
 
 # check the location of the inline attribute, that it is between
@@ -5240,8 +5754,9 @@ sub process {
                              "Using weak declarations can have unintended link defects\n" . $herecurr);
                }
 
-# check for c99 types like uint8_t used outside of uapi/
+# check for c99 types like uint8_t used outside of uapi/ and tools/
                if ($realfile !~ m@\binclude/uapi/@ &&
+                   $realfile !~ m@\btools/@ &&
                    $line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) {
                        my $type = $1;
                        if ($type =~ /\b($typeC99Typedefs)\b/) {
@@ -5258,6 +5773,26 @@ sub process {
                        }
                }
 
+# check for cast of C90 native int or longer types constants
+               if ($line =~ /(\(\s*$C90_int_types\s*\)\s*)($Constant)\b/) {
+                       my $cast = $1;
+                       my $const = $2;
+                       if (WARN("TYPECAST_INT_CONSTANT",
+                                "Unnecessary typecast of c90 int constant\n" . $herecurr) &&
+                           $fix) {
+                               my $suffix = "";
+                               my $newconst = $const;
+                               $newconst =~ s/${Int_type}$//;
+                               $suffix .= 'U' if ($cast =~ /\bunsigned\b/);
+                               if ($cast =~ /\blong\s+long\b/) {
+                                       $suffix .= 'LL';
+                               } elsif ($cast =~ /\blong\b/) {
+                                       $suffix .= 'L';
+                               }
+                               $fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/;
+                       }
+               }
+
 # check for sizeof(&)
                if ($line =~ /\bsizeof\s*\(\s*\&/) {
                        WARN("SIZEOF_ADDRESS",
@@ -5292,6 +5827,53 @@ sub process {
                        }
                }
 
+# check for vsprintf extension %p<foo> misuses
+               if ($^V && $^V ge 5.10.0 &&
+                   defined $stat &&
+                   $stat =~ /^\+(?![^\{]*\{\s*).*\b(\w+)\s*\(.*$String\s*,/s &&
+                   $1 !~ /^_*volatile_*$/) {
+                       my $stat_real;
+
+                       my $lc = $stat =~ tr@\n@@;
+                       $lc = $lc + $linenr;
+                       for (my $count = $linenr; $count <= $lc; $count++) {
+                               my $specifier;
+                               my $extension;
+                               my $bad_specifier = "";
+                               my $fmt = get_quoted_string($lines[$count - 1], raw_line($count, 0));
+                               $fmt =~ s/%%//g;
+
+                               while ($fmt =~ /(\%[\*\d\.]*p(\w))/g) {
+                                       $specifier = $1;
+                                       $extension = $2;
+                                       if ($extension !~ /[SsBKRraEhMmIiUDdgVCbGNOx]/) {
+                                               $bad_specifier = $specifier;
+                                               last;
+                                       }
+                                       if ($extension eq "x" && !defined($stat_real)) {
+                                               if (!defined($stat_real)) {
+                                                       $stat_real = get_stat_real($linenr, $lc);
+                                               }
+                                               WARN("VSPRINTF_SPECIFIER_PX",
+                                                    "Using vsprintf specifier '\%px' potentially exposes the kernel memory layout, if you don't really need the address please consider using '\%p'.\n" . "$here\n$stat_real\n");
+                                       }
+                               }
+                               if ($bad_specifier ne "") {
+                                       my $stat_real = get_stat_real($linenr, $lc);
+                                       my $ext_type = "Invalid";
+                                       my $use = "";
+                                       if ($bad_specifier =~ /p[Ff]/) {
+                                               $ext_type = "Deprecated";
+                                               $use = " - use %pS instead";
+                                               $use =~ s/pS/ps/ if ($bad_specifier =~ /pf/);
+                                       }
+
+                                       WARN("VSPRINTF_POINTER_EXTENSION",
+                                            "$ext_type vsprintf pointer extension '$bad_specifier'$use\n" . "$here\n$stat_real\n");
+                               }
+                       }
+               }
+
 # Check for misused memsets
                if ($^V && $^V ge 5.10.0 &&
                    defined $stat &&
@@ -5311,46 +5893,46 @@ sub process {
                }
 
 # Check for memcpy(foo, bar, ETH_ALEN) that could be ether_addr_copy(foo, bar)
-               if ($^V && $^V ge 5.10.0 &&
-                   defined $stat &&
-                   $stat =~ /^\+(?:.*?)\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
-                       if (WARN("PREFER_ETHER_ADDR_COPY",
-                                "Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)\n" . "$here\n$stat\n") &&
-                           $fix) {
-                               $fixed[$fixlinenr] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/;
-                       }
-               }
+#              if ($^V && $^V ge 5.10.0 &&
+#                  defined $stat &&
+#                  $stat =~ /^\+(?:.*?)\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
+#                      if (WARN("PREFER_ETHER_ADDR_COPY",
+#                               "Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)\n" . "$here\n$stat\n") &&
+#                          $fix) {
+#                              $fixed[$fixlinenr] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/;
+#                      }
+#              }
 
 # Check for memcmp(foo, bar, ETH_ALEN) that could be ether_addr_equal*(foo, bar)
-               if ($^V && $^V ge 5.10.0 &&
-                   defined $stat &&
-                   $stat =~ /^\+(?:.*?)\bmemcmp\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
-                       WARN("PREFER_ETHER_ADDR_EQUAL",
-                            "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . "$here\n$stat\n")
-               }
+#              if ($^V && $^V ge 5.10.0 &&
+#                  defined $stat &&
+#                  $stat =~ /^\+(?:.*?)\bmemcmp\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
+#                      WARN("PREFER_ETHER_ADDR_EQUAL",
+#                           "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . "$here\n$stat\n")
+#              }
 
 # check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr
 # check for memset(foo, 0xFF, ETH_ALEN) that could be eth_broadcast_addr
-               if ($^V && $^V ge 5.10.0 &&
-                   defined $stat &&
-                   $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
-
-                       my $ms_val = $7;
-
-                       if ($ms_val =~ /^(?:0x|)0+$/i) {
-                               if (WARN("PREFER_ETH_ZERO_ADDR",
-                                        "Prefer eth_zero_addr over memset()\n" . "$here\n$stat\n") &&
-                                   $fix) {
-                                       $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_zero_addr($2)/;
-                               }
-                       } elsif ($ms_val =~ /^(?:0xff|255)$/i) {
-                               if (WARN("PREFER_ETH_BROADCAST_ADDR",
-                                        "Prefer eth_broadcast_addr() over memset()\n" . "$here\n$stat\n") &&
-                                   $fix) {
-                                       $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_broadcast_addr($2)/;
-                               }
-                       }
-               }
+#              if ($^V && $^V ge 5.10.0 &&
+#                  defined $stat &&
+#                  $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
+#
+#                      my $ms_val = $7;
+#
+#                      if ($ms_val =~ /^(?:0x|)0+$/i) {
+#                              if (WARN("PREFER_ETH_ZERO_ADDR",
+#                                       "Prefer eth_zero_addr over memset()\n" . "$here\n$stat\n") &&
+#                                  $fix) {
+#                                      $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_zero_addr($2)/;
+#                              }
+#                      } elsif ($ms_val =~ /^(?:0xff|255)$/i) {
+#                              if (WARN("PREFER_ETH_BROADCAST_ADDR",
+#                                       "Prefer eth_broadcast_addr() over memset()\n" . "$here\n$stat\n") &&
+#                                  $fix) {
+#                                      $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_broadcast_addr($2)/;
+#                              }
+#                      }
+#              }
 
 # typecasts on min/max could be min_t/max_t
                if ($^V && $^V ge 5.10.0 &&
@@ -5401,10 +5983,7 @@ sub process {
                     $stat !~ /(?:$Compare)\s*\bsscanf\s*$balanced_parens/)) {
                        my $lc = $stat =~ tr@\n@@;
                        $lc = $lc + $linenr;
-                       my $stat_real = raw_line($linenr, 0);
-                       for (my $count = $linenr + 1; $count <= $lc; $count++) {
-                               $stat_real = $stat_real . "\n" . raw_line($count, 0);
-                       }
+                       my $stat_real = get_stat_real($linenr, $lc);
                        WARN("NAKED_SSCANF",
                             "unchecked sscanf return value\n" . "$here\n$stat_real\n");
                }
@@ -5415,10 +5994,7 @@ sub process {
                    $line =~ /\bsscanf\b/) {
                        my $lc = $stat =~ tr@\n@@;
                        $lc = $lc + $linenr;
-                       my $stat_real = raw_line($linenr, 0);
-                       for (my $count = $linenr + 1; $count <= $lc; $count++) {
-                               $stat_real = $stat_real . "\n" . raw_line($count, 0);
-                       }
+                       my $stat_real = get_stat_real($linenr, $lc);
                        if ($stat_real =~ /\bsscanf\b\s*\(\s*$FuncArg\s*,\s*("[^"]+")/) {
                                my $format = $6;
                                my $count = $format =~ tr@%@%@;
@@ -5470,13 +6046,50 @@ sub process {
                             "externs should be avoided in .c files\n" .  $herecurr);
                }
 
+# check for function declarations that have arguments without identifier names
+               if (defined $stat &&
+                   $stat =~ /^.\s*(?:extern\s+)?$Type\s*(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*\(\s*([^{]+)\s*\)\s*;/s &&
+                   $1 ne "void") {
+                       my $args = trim($1);
+                       while ($args =~ m/\s*($Type\s*(?:$Ident|\(\s*\*\s*$Ident?\s*\)\s*$balanced_parens)?)/g) {
+                               my $arg = trim($1);
+                               if ($arg =~ /^$Type$/ && $arg !~ /enum\s+$Ident$/) {
+                                       WARN("FUNCTION_ARGUMENTS",
+                                            "function definition argument '$arg' should also have an identifier name\n" . $herecurr);
+                               }
+                       }
+               }
+
+# check for function definitions
+               if ($^V && $^V ge 5.10.0 &&
+                   defined $stat &&
+                   $stat =~ /^.\s*(?:$Storage\s+)?$Type\s*($Ident)\s*$balanced_parens\s*{/s) {
+                       $context_function = $1;
+
+# check for multiline function definition with misplaced open brace
+                       my $ok = 0;
+                       my $cnt = statement_rawlines($stat);
+                       my $herectx = $here . "\n";
+                       for (my $n = 0; $n < $cnt; $n++) {
+                               my $rl = raw_line($linenr, $n);
+                               $herectx .=  $rl . "\n";
+                               $ok = 1 if ($rl =~ /^[ \+]\{/);
+                               $ok = 1 if ($rl =~ /\{/ && $n == 0);
+                               last if $rl =~ /^[ \+].*\{/;
+                       }
+                       if (!$ok) {
+                               ERROR("OPEN_BRACE",
+                                     "open brace '{' following function definitions go on the next line\n" . $herectx);
+                       }
+               }
+
 # checks for new __setup's
                if ($rawline =~ /\b__setup\("([^"]*)"/) {
                        my $name = $1;
 
                        if (!grep(/$name/, @setup_docs)) {
                                CHK("UNDOCUMENTED_SETUP",
-                                   "__setup appears un-documented -- check Documentation/kernel-parameters.txt\n" . $herecurr);
+                                   "__setup appears un-documented -- check Documentation/admin-guide/kernel-parameters.rst\n" . $herecurr);
                        }
                }
 
@@ -5496,7 +6109,8 @@ sub process {
 
 # check for k[mz]alloc with multiplies that could be kmalloc_array/kcalloc
                if ($^V && $^V ge 5.10.0 &&
-                   $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) {
+                   defined $stat &&
+                   $stat =~ /^\+\s*($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) {
                        my $oldfunc = $3;
                        my $a1 = $4;
                        my $a2 = $10;
@@ -5510,11 +6124,14 @@ sub process {
                        }
                        if ($r1 !~ /^sizeof\b/ && $r2 =~ /^sizeof\s*\S/ &&
                            !($r1 =~ /^$Constant$/ || $r1 =~ /^[A-Z_][A-Z0-9_]*$/)) {
+                               my $cnt = statement_rawlines($stat);
+                               my $herectx = get_stat_here($linenr, $cnt, $here);
+
                                if (WARN("ALLOC_WITH_MULTIPLY",
-                                        "Prefer $newfunc over $oldfunc with multiply\n" . $herecurr) &&
+                                        "Prefer $newfunc over $oldfunc with multiply\n" . $herectx) &&
+                                   $cnt == 1 &&
                                    $fix) {
                                        $fixed[$fixlinenr] =~ s/\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)/$1 . ' = ' . "$newfunc(" . trim($r1) . ', ' . trim($r2)/e;
-
                                }
                        }
                }
@@ -5541,8 +6158,9 @@ sub process {
                        }
                }
 
-# check for #defines like: 1 << <digit> that could be BIT(digit)
-               if ($line =~ /#\s*define\s+\w+\s+\(?\s*1\s*([ulUL]*)\s*\<\<\s*(?:\d+|$Ident)\s*\)?/) {
+# check for #defines like: 1 << <digit> that could be BIT(digit), it is not exported to uapi
+               if ($realfile !~ m@^include/uapi/@ &&
+                   $line =~ /#\s*define\s+\w+\s+\(?\s*1\s*([ulUL]*)\s*\<\<\s*(?:\d+|$Ident)\s*\)?/) {
                        my $ull = "";
                        $ull = "_ULL" if (defined($1) && $1 =~ /ll/i);
                        if (CHK("BIT_MACRO",
@@ -5552,6 +6170,16 @@ sub process {
                        }
                }
 
+# check for #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE
+               if ($line =~ /^\+\s*#\s*if\s+defined(?:\s*\(?\s*|\s+)(CONFIG_[A-Z_]+)\s*\)?\s*\|\|\s*defined(?:\s*\(?\s*|\s+)\1_MODULE\s*\)?\s*$/) {
+                       my $config = $1;
+                       if (WARN("PREFER_IS_ENABLED",
+                                "Prefer IS_ENABLED(<FOO>) to CONFIG_<FOO> || CONFIG_<FOO>_MODULE\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$fixlinenr] = "\+#if IS_ENABLED($config)";
+                       }
+               }
+
 # check for case / default statements not preceded by break/fallthrough/switch
                if ($line =~ /^.\s*(?:case\s+(?:$Ident|$Constant)\s*|default):/) {
                        my $has_break = 0;
@@ -5569,11 +6197,11 @@ sub process {
                                next if ($fline =~ /^.[\s$;]*$/);
                                $has_statement = 1;
                                $count++;
-                               $has_break = 1 if ($fline =~ /\bswitch\b|\b(?:break\s*;[\s$;]*$|return\b|goto\b|continue\b)/);
+                               $has_break = 1 if ($fline =~ /\bswitch\b|\b(?:break\s*;[\s$;]*$|exit\s*\(\b|return\b|goto\b|continue\b)/);
                        }
                        if (!$has_break && $has_statement) {
                                WARN("MISSING_BREAK",
-                                    "Possible switch case/default not preceeded by break or fallthrough comment\n" . $herecurr);
+                                    "Possible switch case/default not preceded by break or fallthrough comment\n" . $herecurr);
                        }
                }
 
@@ -5581,12 +6209,9 @@ sub process {
                if ($^V && $^V ge 5.10.0 &&
                    defined $stat &&
                    $stat =~ /^\+[$;\s]*(?:case[$;\s]+\w+[$;\s]*:[$;\s]*|)*[$;\s]*\bdefault[$;\s]*:[$;\s]*;/g) {
-                       my $ctx = '';
-                       my $herectx = $here . "\n";
                        my $cnt = statement_rawlines($stat);
-                       for (my $n = 0; $n < $cnt; $n++) {
-                               $herectx .= raw_line($linenr, $n) . "\n";
-                       }
+                       my $herectx = get_stat_here($linenr, $cnt, $here);
+
                        WARN("DEFAULT_NO_BREAK",
                             "switch default: should use break\n" . $herectx);
                }
@@ -5639,6 +6264,12 @@ 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" . $herecurr);
+               }
+
 # check for semaphores initialized locked
                if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) {
                        WARN("CONSIDER_COMPLETION",
@@ -5658,51 +6289,11 @@ sub process {
                }
 
 # check for various structs that are normally const (ops, kgdb, device_tree)
-               my $const_structs = qr{
-                               acpi_dock_ops|
-                               address_space_operations|
-                               backlight_ops|
-                               block_device_operations|
-                               dentry_operations|
-                               dev_pm_ops|
-                               dma_map_ops|
-                               extent_io_ops|
-                               file_lock_operations|
-                               file_operations|
-                               hv_ops|
-                               ide_dma_ops|
-                               intel_dvo_dev_ops|
-                               item_operations|
-                               iwl_ops|
-                               kgdb_arch|
-                               kgdb_io|
-                               kset_uevent_ops|
-                               lock_manager_operations|
-                               microcode_ops|
-                               mtrr_ops|
-                               neigh_ops|
-                               nlmsvc_binding|
-                               of_device_id|
-                               pci_raw_ops|
-                               pipe_buf_operations|
-                               platform_hibernation_ops|
-                               platform_suspend_ops|
-                               proto_ops|
-                               rpc_pipe_ops|
-                               seq_operations|
-                               snd_ac97_build_ops|
-                               soc_pcmcia_socket_ops|
-                               stacktrace_ops|
-                               sysfs_ops|
-                               tty_operations|
-                               uart_ops|
-                               usb_mon_operations|
-                               wd_ops}x;
+# and avoid what seem like struct definitions 'struct foo {'
                if ($line !~ /\bconst\b/ &&
-                   $line =~ /\bstruct\s+($const_structs)\b/) {
+                   $line =~ /\bstruct\s+($const_structs)\b(?!\s*\{)/) {
                        WARN("CONST_STRUCT",
-                            "struct $1 should normally be const\n" .
-                               $herecurr);
+                            "struct $1 should normally be const\n" . $herecurr);
                }
 
 # use of NR_CPUS is usually wrong
@@ -5742,6 +6333,12 @@ sub process {
                        }
                }
 
+# check for mutex_trylock_recursive usage
+               if ($line =~ /mutex_trylock_recursive/) {
+                       ERROR("LOCKING",
+                             "recursive locking is bad, do not use this ever.\n" . $herecurr);
+               }
+
 # check for lockdep_set_novalidate_class
                if ($line =~ /^.\s*lockdep_set_novalidate_class\s*\(/ ||
                    $line =~ /__lockdep_no_validate__\s*\)/ ) {
@@ -5759,37 +6356,114 @@ sub process {
                             "Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
                }
 
+# check for DEVICE_ATTR uses that could be DEVICE_ATTR_<FOO>
+# and whether or not function naming is typical and if
+# DEVICE_ATTR permissions uses are unusual too
+               if ($^V && $^V ge 5.10.0 &&
+                   defined $stat &&
+                   $stat =~ /\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?\s*(\s*(?:${multi_mode_perms_string_search}|0[0-7]{3,3})\s*)\s*\)?\s*,\s*(\w+)\s*,\s*(\w+)\s*\)/) {
+                       my $var = $1;
+                       my $perms = $2;
+                       my $show = $3;
+                       my $store = $4;
+                       my $octal_perms = perms_to_octal($perms);
+                       if ($show =~ /^${var}_show$/ &&
+                           $store =~ /^${var}_store$/ &&
+                           $octal_perms eq "0644") {
+                               if (WARN("DEVICE_ATTR_RW",
+                                        "Use DEVICE_ATTR_RW\n" . $herecurr) &&
+                                   $fix) {
+                                       $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*$store\s*\)/DEVICE_ATTR_RW(${var})/;
+                               }
+                       } elsif ($show =~ /^${var}_show$/ &&
+                                $store =~ /^NULL$/ &&
+                                $octal_perms eq "0444") {
+                               if (WARN("DEVICE_ATTR_RO",
+                                        "Use DEVICE_ATTR_RO\n" . $herecurr) &&
+                                   $fix) {
+                                       $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(${var})/;
+                               }
+                       } elsif ($show =~ /^NULL$/ &&
+                                $store =~ /^${var}_store$/ &&
+                                $octal_perms eq "0200") {
+                               if (WARN("DEVICE_ATTR_WO",
+                                        "Use DEVICE_ATTR_WO\n" . $herecurr) &&
+                                   $fix) {
+                                       $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*NULL\s*,\s*$store\s*\)/DEVICE_ATTR_WO(${var})/;
+                               }
+                       } elsif ($octal_perms eq "0644" ||
+                                $octal_perms eq "0444" ||
+                                $octal_perms eq "0200") {
+                               my $newshow = "$show";
+                               $newshow = "${var}_show" if ($show ne "NULL" && $show ne "${var}_show");
+                               my $newstore = $store;
+                               $newstore = "${var}_store" if ($store ne "NULL" && $store ne "${var}_store");
+                               my $rename = "";
+                               if ($show ne $newshow) {
+                                       $rename .= " '$show' to '$newshow'";
+                               }
+                               if ($store ne $newstore) {
+                                       $rename .= " '$store' to '$newstore'";
+                               }
+                               WARN("DEVICE_ATTR_FUNCTIONS",
+                                    "Consider renaming function(s)$rename\n" . $herecurr);
+                       } else {
+                               WARN("DEVICE_ATTR_PERMS",
+                                    "DEVICE_ATTR unusual permissions '$perms' used\n" . $herecurr);
+                       }
+               }
+
 # Mode permission misuses where it seems decimal should be octal
 # This uses a shortcut match to avoid unnecessary uses of a slow foreach loop
+# o Ignore module_param*(...) uses with a decimal 0 permission as that has a
+#   specific definition of not visible in sysfs.
+# o Ignore proc_create*(...) uses with a decimal 0 permission as that means
+#   use the default permissions
                if ($^V && $^V ge 5.10.0 &&
+                   defined $stat &&
                    $line =~ /$mode_perms_search/) {
                        foreach my $entry (@mode_permission_funcs) {
                                my $func = $entry->[0];
                                my $arg_pos = $entry->[1];
 
+                               my $lc = $stat =~ tr@\n@@;
+                               $lc = $lc + $linenr;
+                               my $stat_real = get_stat_real($linenr, $lc);
+
                                my $skip_args = "";
                                if ($arg_pos > 1) {
                                        $arg_pos--;
                                        $skip_args = "(?:\\s*$FuncArg\\s*,\\s*){$arg_pos,$arg_pos}";
                                }
-                               my $test = "\\b$func\\s*\\(${skip_args}([\\d]+)\\s*[,\\)]";
-                               if ($line =~ /$test/) {
+                               my $test = "\\b$func\\s*\\(${skip_args}($FuncArg(?:\\|\\s*$FuncArg)*)\\s*[,\\)]";
+                               if ($stat =~ /$test/) {
                                        my $val = $1;
                                        $val = $6 if ($skip_args ne "");
-
-                                       if ($val !~ /^0$/ &&
+                                       if (!($func =~ /^(?:module_param|proc_create)/ && $val eq "0") &&
                                            (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
-                                            length($val) ne 4)) {
+                                            ($val =~ /^$Octal$/ && length($val) ne 4))) {
                                                ERROR("NON_OCTAL_PERMISSIONS",
-                                                     "Use 4 digit octal (0777) not decimal permissions\n" . $herecurr);
-                                       } elsif ($val =~ /^$Octal$/ && (oct($val) & 02)) {
+                                                     "Use 4 digit octal (0777) not decimal permissions\n" . "$here\n" . $stat_real);
+                                       }
+                                       if ($val =~ /^$Octal$/ && (oct($val) & 02)) {
                                                ERROR("EXPORTED_WORLD_WRITABLE",
-                                                     "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
+                                                     "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . "$here\n" . $stat_real);
                                        }
                                }
                        }
                }
 
+# check for uses of S_<PERMS> that could be octal for readability
+               while ($line =~ m{\b($multi_mode_perms_string_search)\b}g) {
+                       my $oval = $1;
+                       my $octal = perms_to_octal($oval);
+                       if (WARN("SYMBOLIC_PERMS",
+                                "Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$fixlinenr] =~ s/\Q$oval\E/$octal/;
+                       }
+               }
+
 # validate content of MODULE_LICENSE against list from include/linux/module.h
                if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) {
                        my $extracted_string = get_quoted_string($line, $rawline);
@@ -5827,11 +6501,11 @@ sub process {
                exit(0);
        }
 
-       if (!$is_patch && $file !~ /cover-letter\.patch$/) {
+       if (!$is_patch && $filename !~ /cover-letter\.patch$/) {
                ERROR("NOT_UNIFIED_DIFF",
                      "Does not appear to be a unified-diff format patch\n");
        }
-       if ($is_patch && $filename ne '-' && $chk_signoff && $signoff == 0) {
+       if ($is_patch && $has_commit_log && $chk_signoff && $signoff == 0) {
                ERROR("MISSING_SIGN_OFF",
                      "Missing Signed-off-by: line(s)\n");
        }
@@ -5845,6 +6519,14 @@ sub process {
        }
 
        if ($quiet == 0) {
+               # If there were any defects found and not already fixing them
+               if (!$clean and !$fix) {
+                       print << "EOM"
+
+NOTE: For some of the reported defects, checkpatch may be able to
+      mechanically convert to the typical style using --fix or --fix-inplace.
+EOM
+               }
                # If there were whitespace errors which cleanpatch can fix
                # then suggest that.
                if ($rpt_cleaners) {
diff --git a/scripts/const_structs.checkpatch b/scripts/const_structs.checkpatch
new file mode 100644 (file)
index 0000000..e69de29