Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
[linux-2.6-microblaze.git] / scripts / checkpatch.pl
index 599b8c4..60d4a79 100755 (executable)
@@ -59,7 +59,7 @@ my $spelling_file = "$D/spelling.txt";
 my $codespell = 0;
 my $codespellfile = "/usr/share/codespell/dictionary.txt";
 my $conststructsfile = "$D/const_structs.checkpatch";
-my $typedefsfile = "";
+my $typedefsfile;
 my $color = "auto";
 my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE
 # git output parsing needs US English output, so first set backtick child process LANGUAGE
@@ -588,6 +588,8 @@ our @mode_permission_funcs = (
        ["__ATTR", 2],
 );
 
+my $word_pattern = '\b[A-Z]?[a-z]{2,}\b';
+
 #Create a search pattern for all these functions to speed up a loop below
 our $mode_perms_search = "";
 foreach my $entry (@mode_permission_funcs) {
@@ -756,7 +758,7 @@ sub read_words {
                                next;
                        }
 
-                       $$wordsRef .= '|' if ($$wordsRef ne "");
+                       $$wordsRef .= '|' if (defined $$wordsRef);
                        $$wordsRef .= $line;
                }
                close($file);
@@ -766,16 +768,18 @@ sub read_words {
        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 $const_structs;
+if (show_type("CONST_STRUCT")) {
+       read_words(\$const_structs, $conststructsfile)
+           or warn "No structs that should be const will be found - file '$conststructsfile': $!\n";
+}
 
-my $typeOtherTypedefs = "";
-if (length($typedefsfile)) {
+if (defined($typedefsfile)) {
+       my $typeOtherTypedefs;
        read_words(\$typeOtherTypedefs, $typedefsfile)
            or warn "No additional types will be considered - file '$typedefsfile': $!\n";
+       $typeTypedefs .= '|' . $typeOtherTypedefs if (defined $typeOtherTypedefs);
 }
-$typeTypedefs .= '|' . $typeOtherTypedefs if ($typeOtherTypedefs ne "");
 
 sub build_types {
        my $mods = "(?x:  \n" . join("|\n  ", (@modifierList, @modifierListFile)) . "\n)";
@@ -3041,11 +3045,7 @@ sub process {
 
                                if ($lines[$ln - 1] =~ /^\+\s*(?:bool|tristate|prompt)\s*["']/) {
                                        $is_start = 1;
-                               } elsif ($lines[$ln - 1] =~ /^\+\s*(?:help|---help---)\s*$/) {
-                                       if ($lines[$ln - 1] =~ "---help---") {
-                                               WARN("CONFIG_DESCRIPTION",
-                                                    "prefer 'help' over '---help---' for new help texts\n" . $herecurr);
-                                       }
+                               } elsif ($lines[$ln - 1] =~ /^\+\s*(?:---)?help(?:---)?$/) {
                                        $length = -1;
                                }
 
@@ -3310,6 +3310,42 @@ sub process {
                        }
                }
 
+# check for repeated words separated by a single space
+               if ($rawline =~ /^\+/) {
+                       while ($rawline =~ /\b($word_pattern) (?=($word_pattern))/g) {
+
+                               my $first = $1;
+                               my $second = $2;
+
+                               if ($first =~ /(?:struct|union|enum)/) {
+                                       pos($rawline) += length($first) + length($second) + 1;
+                                       next;
+                               }
+
+                               next if ($first ne $second);
+                               next if ($first eq 'long');
+
+                               if (WARN("REPEATED_WORD",
+                                        "Possible repeated word: '$first'\n" . $herecurr) &&
+                                   $fix) {
+                                       $fixed[$fixlinenr] =~ s/\b$first $second\b/$first/;
+                               }
+                       }
+
+                       # if it's a repeated word on consecutive lines in a comment block
+                       if ($prevline =~ /$;+\s*$/ &&
+                           $prevrawline =~ /($word_pattern)\s*$/) {
+                               my $last_word = $1;
+                               if ($rawline =~ /^\+\s*\*\s*$last_word /) {
+                                       if (WARN("REPEATED_WORD",
+                                                "Possible repeated word: '$last_word'\n" . $hereprev) &&
+                                           $fix) {
+                                               $fixed[$fixlinenr] =~ s/(\+\s*\*\s*)$last_word /$1/;
+                                       }
+                               }
+                       }
+               }
+
 # check for space before tabs.
                if ($rawline =~ /^\+/ && $rawline =~ / \t/) {
                        my $herevet = "$here\n" . cat_vet($rawline) . "\n";
@@ -5020,8 +5056,30 @@ sub process {
                        my ($s, $c) = ($stat, $cond);
 
                        if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
-                               ERROR("ASSIGN_IN_IF",
-                                     "do not use assignment in if condition\n" . $herecurr);
+                               if (ERROR("ASSIGN_IN_IF",
+                                         "do not use assignment in if condition\n" . $herecurr) &&
+                                   $fix && $perl_version_ok) {
+                                       if ($rawline =~ /^\+(\s+)if\s*\(\s*(\!)?\s*\(\s*(($Lval)\s*=\s*$LvalOrFunc)\s*\)\s*(?:($Compare)\s*($FuncArg))?\s*\)\s*(\{)?\s*$/) {
+                                               my $space = $1;
+                                               my $not = $2;
+                                               my $statement = $3;
+                                               my $assigned = $4;
+                                               my $test = $8;
+                                               my $against = $9;
+                                               my $brace = $15;
+                                               fix_delete_line($fixlinenr, $rawline);
+                                               fix_insert_line($fixlinenr, "$space$statement;");
+                                               my $newline = "${space}if (";
+                                               $newline .= '!' if defined($not);
+                                               $newline .= '(' if (defined $not && defined($test) && defined($against));
+                                               $newline .= "$assigned";
+                                               $newline .= " $test $against" if (defined($test) && defined($against));
+                                               $newline .= ')' if (defined $not && defined($test) && defined($against));
+                                               $newline .= ')';
+                                               $newline .= " {" if (defined($brace));
+                                               fix_insert_line($fixlinenr + 1, $newline);
+                                       }
+                               }
                        }
 
                        # Find out what is on the end of the line after the
@@ -6465,6 +6523,12 @@ sub process {
                        }
                }
 
+# check for IS_ENABLED() without CONFIG_<FOO> ($rawline for comments too)
+               if ($rawline =~ /\bIS_ENABLED\s*\(\s*(\w+)\s*\)/ && $1 !~ /^CONFIG_/) {
+                       WARN("IS_ENABLED_CONFIG",
+                            "IS_ENABLED($1) is normally used as IS_ENABLED(CONFIG_$1)\n" . $herecurr);
+               }
+
 # check for #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE
                if ($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;
@@ -6475,31 +6539,6 @@ sub process {
                        }
                }
 
-# check for case / default statements not preceded by break/fallthrough/switch
-               if ($line =~ /^.\s*(?:case\s+(?:$Ident|$Constant)\s*|default):/) {
-                       my $has_break = 0;
-                       my $has_statement = 0;
-                       my $count = 0;
-                       my $prevline = $linenr;
-                       while ($prevline > 1 && ($file || $count < 3) && !$has_break) {
-                               $prevline--;
-                               my $rline = $rawlines[$prevline - 1];
-                               my $fline = $lines[$prevline - 1];
-                               last if ($fline =~ /^\@\@/);
-                               next if ($fline =~ /^\-/);
-                               next if ($fline =~ /^.(?:\s*(?:case\s+(?:$Ident|$Constant)[\s$;]*|default):[\s$;]*)*$/);
-                               $has_break = 1 if ($rline =~ /fall[\s_-]*(through|thru)/i);
-                               next if ($fline =~ /^.[\s$;]*$/);
-                               $has_statement = 1;
-                               $count++;
-                               $has_break = 1 if ($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 preceded by break or fallthrough comment\n" . $herecurr);
-                       }
-               }
-
 # check for /* fallthrough */ like comment, prefer fallthrough;
                my @fallthroughs = (
                        'fallthrough',
@@ -6615,7 +6654,8 @@ sub process {
 
 # check for various structs that are normally const (ops, kgdb, device_tree)
 # and avoid what seem like struct definitions 'struct foo {'
-               if ($line !~ /\bconst\b/ &&
+               if (defined($const_structs) &&
+                   $line !~ /\bconst\b/ &&
                    $line =~ /\bstruct\s+($const_structs)\b(?!\s*\{)/) {
                        WARN("CONST_STRUCT",
                             "struct $1 should normally be const\n" . $herecurr);