linux-kernel - [PATCH 2/2] checkpatch: Check CamelCase by word, not by $Lval

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Date:	Mon, 22 Jul 2013 11:16:21 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andy Whitcroft <apw@...onical.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] checkpatch: Check CamelCase by word, not by $Lval

$Lval is a test for complete name (ie: foo->bar.Baz[1])

If any of this is CamelCase, then the current test uses
the entire $Lval.  This isn't optimal because it can
emit messages with foo->bar.Baz and bar.Baz when Baz is
a variable specified in an include file.

So instead, break the $Lval into words and check each
word for CamelCase uses.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 scripts/checkpatch.pl | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 7dc00fd..5cfef19 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3302,11 +3302,15 @@ sub process {
 			    $var !~ /^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
 #Ignore SI style variants like nS, mV and dB (ie: max_uV, regulator_min_uA_show)
 			    $var !~ /^(?:[a-z_]*?)_?[a-z][A-Z](?:_[a-z_]+)?$/) {
-				seed_camelcase_includes() if ($check);
-				if (!defined $camelcase{$var}) {
-					$camelcase{$var} = 1;
-					CHK("CAMELCASE",
-					    "Avoid CamelCase: <$var>\n" . $herecurr);
+				while ($var =~ m{($Ident)}g) {
+					my $word = $1;
+					next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/);
+					seed_camelcase_includes() if ($check);
+					if (!defined $camelcase{$word}) {
+						$camelcase{$word} = 1;
+						CHK("CAMELCASE",
+						    "Avoid CamelCase: <$word>\n" . $herecurr);
+					}
 				}
 			}
 		}
-- 
1.8.1.2.459.gbcd45b4.dirty

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