checkpatch: allow c99 style // comments

Sanitise the lines that contain c99 comments so that the error doesn't
get emitted.

Link: http://lkml.kernel.org/r/d4d22c34ad7bcc1bceb52f0742f76b7a6d585235.1468368420.git.joe@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 a4476b6..7927300 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -55,6 +55,7 @@ my $spelling_file = "$D/spelling.txt";
 my $codespell = 0;
 my $codespellfile = "/usr/share/codespell/dictionary.txt";
 my $color = 1;
+my $allow_c99_comments = 1;
 
 sub help {
        my ($exitcode) = @_;
@@ -1144,6 +1145,11 @@ 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;
 }