checkpatch: possible types -- prevent illegal modifiers being added

Prevent known non types being detected as modifiers.  Ensure we do not
look at any type which starts with a keyword.

Signed-off-by: Andy Whitcroft <apw@canonical.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 87bbb8b..b43e309 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -997,23 +997,25 @@ sub annotate_values {
 
 sub possible {
        my ($possible, $line) = @_;
-
-       print "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
-       if ($possible !~ /(?:
+       my $notPermitted = qr{(?:
                ^(?:
                        $Modifier|
                        $Storage|
                        $Type|
-                       DEFINE_\S+|
+                       DEFINE_\S+
+               )$|
+               ^(?:
                        goto|
                        return|
                        case|
                        else|
                        asm|__asm__|
                        do
-               )$|
+               )(?:\s|$)|
                ^(?:typedef|struct|enum)\b
-           )/x) {
+           )}x;
+       warn "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
+       if ($possible !~ $notPermitted) {
                # Check for modifiers.
                $possible =~ s/\s*$Storage\s*//g;
                $possible =~ s/\s*$Sparse\s*//g;
@@ -1022,8 +1024,10 @@ sub possible {
                } elsif ($possible =~ /\s/) {
                        $possible =~ s/\s*$Type\s*//g;
                        for my $modifier (split(' ', $possible)) {
-                               warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
-                               push(@modifierList, $modifier);
+                               if ($modifier !~ $notPermitted) {
+                                       warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
+                                       push(@modifierList, $modifier);
+                               }
                        }
 
                } else {