checkpatch: add --fix for CONCATENATED_STRING and STRING_FRAGMENTS

Add the ability to --fix these string issues.

e.g.:
	printk(KERN_INFO"bar" "baz"QUX);
converts to
	printk(KERN_INFO "barbaz" QUX);

Link: http://lkml.kernel.org/r/a9fb505ccfedffc5869d08832a7ff05a21d85621.camel@perches.com
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 5cb7cfd..f2e00dc 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5330,15 +5330,28 @@ sub process {
                }
 
 # concatenated string without spaces between elements
-               if ($line =~ /$String[A-Z_]/ || $line =~ /[A-Za-z0-9_]$String/) {
-                       CHK("CONCATENATED_STRING",
-                           "Concatenated strings should use spaces between elements\n" . $herecurr);
+               if ($line =~ /$String[A-Za-z0-9_]/ || $line =~ /[A-Za-z0-9_]$String/) {
+                       if (CHK("CONCATENATED_STRING",
+                               "Concatenated strings should use spaces between elements\n" . $herecurr) &&
+                           $fix) {
+                               while ($line =~ /($String)/g) {
+                                       my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]);
+                                       $fixed[$fixlinenr] =~ s/\Q$extracted_string\E([A-Za-z0-9_])/$extracted_string $1/;
+                                       $fixed[$fixlinenr] =~ s/([A-Za-z0-9_])\Q$extracted_string\E/$1 $extracted_string/;
+                               }
+                       }
                }
 
 # uncoalesced string fragments
                if ($line =~ /$String\s*"/) {
-                       WARN("STRING_FRAGMENTS",
-                            "Consecutive strings are generally better as a single string\n" . $herecurr);
+                       if (WARN("STRING_FRAGMENTS",
+                                "Consecutive strings are generally better as a single string\n" . $herecurr) &&
+                           $fix) {
+                               while ($line =~ /($String)(?=\s*")/g) {
+                                       my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]);
+                                       $fixed[$fixlinenr] =~ s/\Q$extracted_string\E\s*"/substr($extracted_string, 0, -1)/e;
+                               }
+                       }
                }
 
 # check for non-standard and hex prefixed decimal printf formats