checkpatch: add a few more --fix corrections

Suggest a few more single-line corrections.

Remove DOS line endings
Simplify removing trailing whitespace
Remove global/static initializations to 0/NULL
Convert pr_warning to pr_warn
Add space after brace
Convert binary constants to hex
Remove whitespace after line continuation
Use inline not __inline or __inline__
Use __printf and __scanf
Use a single ; for statement terminations
Convert __FUNCTION__ to __func__

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 2ee9eb7..9163651 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1845,15 +1845,17 @@ sub process {
 #trailing whitespace
                if ($line =~ /^\+.*\015/) {
                        my $herevet = "$here\n" . cat_vet($rawline) . "\n";
-                       ERROR("DOS_LINE_ENDINGS",
-                             "DOS line endings\n" . $herevet);
-
+                       if (ERROR("DOS_LINE_ENDINGS",
+                                 "DOS line endings\n" . $herevet) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/[\s\015]+$//;
+                       }
                } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
                        my $herevet = "$here\n" . cat_vet($rawline) . "\n";
                        if (ERROR("TRAILING_WHITESPACE",
                                  "trailing whitespace\n" . $herevet) &&
                            $fix) {
-                               $fixed[$linenr - 1] =~ s/^(\+.*?)\s+$/$1/;
+                               $fixed[$linenr - 1] =~ s/\s+$//;
                        }
 
                        $rpt_cleaners = 1;
@@ -2486,16 +2488,22 @@ sub process {
                }
 
 # check for global initialisers.
-               if ($line =~ /^.$Type\s*$Ident\s*(?:\s+$Modifier)*\s*=\s*(0|NULL|false)\s*;/) {
-                       ERROR("GLOBAL_INITIALISERS",
-                             "do not initialise globals to 0 or NULL\n" .
-                               $herecurr);
+               if ($line =~ /^\+(\s*$Type\s*$Ident\s*(?:\s+$Modifier))*\s*=\s*(0|NULL|false)\s*;/) {
+                       if (ERROR("GLOBAL_INITIALISERS",
+                                 "do not initialise globals to 0 or NULL\n" .
+                                     $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/($Type\s*$Ident\s*(?:\s+$Modifier))*\s*=\s*(0|NULL|false)\s*;/$1;/;
+                       }
                }
 # check for static initialisers.
-               if ($line =~ /\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
-                       ERROR("INITIALISED_STATIC",
-                             "do not initialise statics to 0 or NULL\n" .
-                               $herecurr);
+               if ($line =~ /^\+.*\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
+                       if (ERROR("INITIALISED_STATIC",
+                                 "do not initialise statics to 0 or NULL\n" .
+                                     $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/(\bstatic\s.*?)\s*=\s*(0|NULL|false)\s*;/$1;/;
+                       }
                }
 
 # check for static const char * arrays.
@@ -2638,8 +2646,12 @@ sub process {
                }
 
                if ($line =~ /\bpr_warning\s*\(/) {
-                       WARN("PREFER_PR_LEVEL",
-                            "Prefer pr_warn(... to pr_warning(...\n" . $herecurr);
+                       if (WARN("PREFER_PR_LEVEL",
+                                "Prefer pr_warn(... to pr_warning(...\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~
+                                   s/\bpr_warning\b/pr_warn/;
+                       }
                }
 
                if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) {
@@ -3031,8 +3043,7 @@ sub process {
                        if (ERROR("SPACING",
                                  "space required before the open brace '{'\n" . $herecurr) &&
                            $fix) {
-                               $fixed[$linenr - 1] =~
-                                   s/^(\+.*(?:do|\))){/$1 {/;
+                               $fixed[$linenr - 1] =~ s/^(\+.*(?:do|\))){/$1 {/;
                        }
                }
 
@@ -3047,8 +3058,12 @@ sub process {
 # closing brace should have a space following it when it has anything
 # on the line
                if ($line =~ /}(?!(?:,|;|\)))\S/) {
-                       ERROR("SPACING",
-                             "space required after that close brace '}'\n" . $herecurr);
+                       if (ERROR("SPACING",
+                                 "space required after that close brace '}'\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~
+                                   s/}((?!(?:,|;|\)))\S)/} $1/;
+                       }
                }
 
 # check spacing on square brackets
@@ -3271,8 +3286,13 @@ sub process {
 
 #gcc binary extension
                        if ($var =~ /^$Binary$/) {
-                               WARN("GCC_BINARY_CONSTANT",
-                                    "Avoid gcc v4.3+ binary constant extension: <$var>\n" . $herecurr);
+                               if (WARN("GCC_BINARY_CONSTANT",
+                                        "Avoid gcc v4.3+ binary constant extension: <$var>\n" . $herecurr) &&
+                                   $fix) {
+                                       my $hexval = sprintf("0x%x", oct($var));
+                                       $fixed[$linenr - 1] =~
+                                           s/\b$var\b/$hexval/;
+                               }
                        }
 
 #CamelCase
@@ -3292,9 +3312,12 @@ sub process {
                }
 
 #no spaces allowed after \ in define
-               if ($line=~/\#\s*define.*\\\s$/) {
-                       WARN("WHITESPACE_AFTER_LINE_CONTINUATION",
-                            "Whitepspace after \\ makes next lines useless\n" . $herecurr);
+               if ($line =~ /\#\s*define.*\\\s+$/) {
+                       if (WARN("WHITESPACE_AFTER_LINE_CONTINUATION",
+                                "Whitespace after \\ makes next lines useless\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/\s+$//;
+                       }
                }
 
 #warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
@@ -3691,8 +3714,12 @@ sub process {
 
 # Check for __inline__ and __inline, prefer inline
                if ($line =~ /\b(__inline__|__inline)\b/) {
-                       WARN("INLINE",
-                            "plain inline is preferred over $1\n" . $herecurr);
+                       if (WARN("INLINE",
+                                "plain inline is preferred over $1\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/\b(__inline__|__inline)\b/inline/;
+
+                       }
                }
 
 # Check for __attribute__ packed, prefer __packed
@@ -3709,14 +3736,21 @@ sub process {
 
 # Check for __attribute__ format(printf, prefer __printf
                if ($line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf/) {
-                       WARN("PREFER_PRINTF",
-                            "__printf(string-index, first-to-check) is preferred over __attribute__((format(printf, string-index, first-to-check)))\n" . $herecurr);
+                       if (WARN("PREFER_PRINTF",
+                                "__printf(string-index, first-to-check) is preferred over __attribute__((format(printf, string-index, first-to-check)))\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf\s*,\s*(.*)\)\s*\)\s*\)/"__printf(" . trim($1) . ")"/ex;
+
+                       }
                }
 
 # Check for __attribute__ format(scanf, prefer __scanf
                if ($line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\b/) {
-                       WARN("PREFER_SCANF",
-                            "__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . $herecurr);
+                       if (WARN("PREFER_SCANF",
+                                "__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\s*,\s*(.*)\)\s*\)\s*\)/"__scanf(" . trim($1) . ")"/ex;
+                       }
                }
 
 # check for sizeof(&)
@@ -3727,8 +3761,11 @@ sub process {
 
 # check for sizeof without parenthesis
                if ($line =~ /\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/) {
-                       WARN("SIZEOF_PARENTHESIS",
-                            "sizeof $1 should be sizeof($1)\n" . $herecurr);
+                       if (WARN("SIZEOF_PARENTHESIS",
+                                "sizeof $1 should be sizeof($1)\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/"sizeof(" . trim($1) . ")"/ex;
+                       }
                }
 
 # check for line continuations in quoted strings with odd counts of "
@@ -3747,8 +3784,11 @@ sub process {
                if ($line =~ /\bseq_printf\s*\(/) {
                        my $fmt = get_quoted_string($line, $rawline);
                        if ($fmt !~ /[^\\]\%/) {
-                               WARN("PREFER_SEQ_PUTS",
-                                    "Prefer seq_puts to seq_printf\n" . $herecurr);
+                               if (WARN("PREFER_SEQ_PUTS",
+                                        "Prefer seq_puts to seq_printf\n" . $herecurr) &&
+                                   $fix) {
+                                       $fixed[$linenr - 1] =~ s/\bseq_printf\b/seq_puts/;
+                               }
                        }
                }
 
@@ -3879,8 +3919,11 @@ sub process {
 
 # check for multiple semicolons
                if ($line =~ /;\s*;\s*$/) {
-                       WARN("ONE_SEMICOLON",
-                            "Statements terminations use 1 semicolon\n" . $herecurr);
+                       if (WARN("ONE_SEMICOLON",
+                                "Statements terminations use 1 semicolon\n" . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/(\s*;\s*){2,}$/;/g;
+                       }
                }
 
 # check for switch/default statements without a break;
@@ -3898,9 +3941,12 @@ sub process {
                }
 
 # check for gcc specific __FUNCTION__
-               if ($line =~ /__FUNCTION__/) {
-                       WARN("USE_FUNC",
-                            "__func__ should be used instead of gcc specific __FUNCTION__\n"  . $herecurr);
+               if ($line =~ /\b__FUNCTION__\b/) {
+                       if (WARN("USE_FUNC",
+                                "__func__ should be used instead of gcc specific __FUNCTION__\n"  . $herecurr) &&
+                           $fix) {
+                               $fixed[$linenr - 1] =~ s/\b__FUNCTION__\b/__func__/g;
+                       }
                }
 
 # check for use of yield()