checkpatch: report missing spaces around trigraphs with --strict

Spaces around trigraphs are specified by CodingStyle but checkpatch is
currently silent about them because there are many current instances
without them.

Make missing spaces around trigraphs a --strict message.

Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
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 66cad50..42103a0 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2838,7 +2838,7 @@ sub process {
                                \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
                                =>|->|<<|>>|<|>|=|!|~|
                                &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
-                               \?|:
+                               \?:|\?|:
                        }x;
                        my @elements = split(/($ops|;)/, $opline);
 
@@ -3061,15 +3061,13 @@ sub process {
                                                $ok = 1;
                                        }
 
-                                       # Ignore ?:
-                                       if (($opv eq ':O' && $ca =~ /\?$/) ||
-                                           ($op eq '?' && $cc =~ /^:/)) {
-                                               $ok = 1;
-                                       }
-
+                                       # messages are ERROR, but ?: are CHK
                                        if ($ok == 0) {
-                                               if (ERROR("SPACING",
-                                                         "spaces required around that '$op' $at\n" . $hereptr)) {
+                                               my $msg_type = \&ERROR;
+                                               $msg_type = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
+
+                                               if (&{$msg_type}("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+//;