From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752268AbbCXNxK (ORCPT ); Tue, 24 Mar 2015 09:53:10 -0400 Received: from smtprelay0151.hostedemail.com ([216.40.44.151]:57006 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751917AbbCXNxH (ORCPT ); Tue, 24 Mar 2015 09:53:07 -0400 X-Session-Marker: 6A6F6540706572636865732E636F6D X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,joe@perches.com,:::::::,RULES_HIT:41:355:379:541:800:960:973:982:988:989:1260:1277:1311:1313:1314:1345:1373:1437:1515:1516:1518:1534:1541:1593:1594:1711:1730:1747:1777:1792:2197:2198:2199:2200:2393:2559:2562:2828:2898:3138:3139:3140:3141:3142:3352:3653:3865:3867:3871:4321:4605:5007:6261:8957:10004:10400:10848:11026:11473:11658:11914:12043:12296:12346:12438:12517:12519:12555:13069:13311:13357:14394:21080,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0 X-HE-Tag: front44_1afb8b2f70006 X-Filterd-Recvd-Size: 2596 Message-ID: <1427205183.5642.15.camel@perches.com> Subject: [PATCH] checkpatch: Add test for repeated const uses From: Joe Perches To: Andrew Morton Cc: Andy Whitcroft , Krzysztof Kozlowski , LKML Date: Tue, 24 Mar 2015 06:53:03 -0700 Content-Type: text/plain; charset="ISO-8859-1" X-Mailer: Evolution 3.12.10-0ubuntu1~14.10.1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Using 'const const *' is generally meant to be written 'const * const'. Add a test for the miswritten form. Signed-off-by: Joe Perches --- scripts/checkpatch.pl | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 5748c35..a234bf8 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -323,6 +323,7 @@ our $Operators = qr{ our $c90_Keywords = qr{do|for|while|if|else|return|goto|continue|switch|default|case|break}x; +our $BasicType; our $NonptrType; our $NonptrTypeMisordered; our $NonptrTypeWithAttr; @@ -514,6 +515,11 @@ sub build_types { my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)"; my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)"; $Modifier = qr{(?:$Attribute|$Sparse|$mods)}; + $BasicType = qr{ + (?:$typeOtherOSTypedefs\b)| + (?:$typeTypedefs\b)| + (?:${all}\b) + }x; $NonptrType = qr{ (?:$Modifier\s+|const\s+)* (?: @@ -3192,6 +3198,18 @@ sub process { $herecurr); } +# check for const const where is not a pointer or array type + if ($sline =~ /\bconst\s+($BasicType)\s+const\b/) { + my $found = $1; + if ($sline =~ /\bconst\s+\Q$found\E\s+const\b\s*\*/) { + WARN("CONST_CONST", + "'const $found const *' should probably be 'const $found * const'\n" . $herecurr); + } elsif ($sline !~ /\bconst\s+\Q$found\E\s+const\s+\w+\s*\[/) { + WARN("CONST_CONST", + "'const $found const' should probably be 'const $found'\n" . $herecurr); + } + } + # check for non-global char *foo[] = {"bar", ...} declarations. if ($line =~ /^.\s+(?:static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) { WARN("STATIC_CONST_CHAR_ARRAY",