checkpatch: avoid "spaces required around that ':'" false positive

Since commit 1f65f947a6a8 ("checkpatch: add checks for question mark and
colon spacing") back in 2008, checkpatch has reported false positive for
asm volatile uses of "::" checkpatch thinks colons should always have
spaces around it.

Add an exception for colons with colons on either side for this valid asm
volatile (and c++) use.

Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Yehuda Yitschak <yehuday@marvell.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 35aecb3b013c8ae27f4c4cd7dbd7e2af35dc542f..89b1df4e72ab3423bce45011fb03f86c193f5ad4 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3845,6 +3845,14 @@ sub process {
                                                $ok = 1;
                                        }
 
+                                       # for asm volatile statements
+                                       # ignore a colon with another
+                                       # colon immediately before or after
+                                       if (($op eq ':') &&
+                                           ($ca =~ /:$/ || $cc =~ /^:/)) {
+                                               $ok = 1;
+                                       }
+
                                        # messages are ERROR, but ?: are CHK
                                        if ($ok == 0) {
                                                my $msg_type = \&ERROR;