checkpatch: change CamelCase test and make it --strict

Do not bleat a message on nominally acceptable CamelCase uses that are
separated by an _ like drm_core_has_MTRR.

CamelCase tests are also a bit noisy against certain types of code
acceptable to some kernel developers.

Make the test applicable only with --strict.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: 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 b954de5..f1aad19 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2938,12 +2938,12 @@ sub process {
                while ($line =~ m{($Constant|$Lval)}g) {
                        my $var = $1;
                        if ($var !~ /$Constant/ &&
-                           $var =~ /[A-Z]\w*[a-z]|[a-z]\w*[A-Z]/ &&
+                           $var =~ /[A-Z][a-z]|[a-z][A-Z]/ &&
                            $var !~ /"^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
                            !defined $camelcase{$var}) {
                                $camelcase{$var} = 1;
-                               WARN("CAMELCASE",
-                                    "Avoid CamelCase: <$var>\n" . $herecurr);
+                               CHK("CAMELCASE",
+                                   "Avoid CamelCase: <$var>\n" . $herecurr);
                        }
                }