From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S932338AbbHCT4c (ORCPT <rfc822;w@1wt.eu>);
	Mon, 3 Aug 2015 15:56:32 -0400
Received: from smtprelay0136.hostedemail.com ([216.40.44.136]:59713 "EHLO
	smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL)
	by vger.kernel.org with ESMTP id S1755063AbbHCT4b (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Mon, 3 Aug 2015 15:56:31 -0400
X-Session-Marker: 6A6F6540706572636865732E636F6D
X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,joe@perches.com,:::::,RULES_HIT:41:355:379:541:800:960:973:982:988:989:1260:1277:1311:1313:1314:1345:1359:1373:1437:1515:1516:1518:1534:1541:1593:1594:1711:1730:1747:1777:1792:2198:2199:2393:2559:2562:2828:3138:3139:3140:3141:3142:3352:3653:3865:3866:3867:3868:3870:3871:3872:4605:5007:6261:10004:10400:10848:11232:11658:11914:12517:12519:12555:12679:13069:13095:13311:13357:14394:21080,0,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: robin58_72ed7152be61d
X-Filterd-Recvd-Size: 2065
Message-ID: <1438631788.4601.5.camel@perches.com>
Subject: [PATCH V2] checkpatch: Emit an error on formats with 0x%<decimal>
From: Joe Perches <joe@perches.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Whitcroft <apw@canonical.com>, LKML <linux-kernel@vger.kernel.org>
Date: Mon, 03 Aug 2015 12:56:28 -0700
In-Reply-To: <1438618534.30149.37.camel@perches.com>
References: <1438618534.30149.37.camel@perches.com>
Content-Type: text/plain; charset="ISO-8859-1"
X-Mailer: Evolution 3.16.3-1ubuntu1 
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Using 0x%d is wrong.  Emit a message when it happens.

Miscellanea:

improve the %Lu warning to match formats like %16Lu

Signed-off-by: Joe Perches <joe@perches.com>
---
Resend with better email client

 scripts/checkpatch.pl | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 50693f5..e367eab 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4816,16 +4816,20 @@ sub process {
 			     "Consecutive strings are generally better as a single string\n" . $herecurr);
 		}
 
-# check for %L{u,d,i} in strings
+# check for %L{u,d,i} and 0x%[udi] in strings
 		my $string;
 		while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
 			$string = substr($rawline, $-[1], $+[1] - $-[1]);
 			$string =~ s/%%/__/g;
-			if ($string =~ /(?<!%)%L[udi]/) {
+			if ($string =~ /(?<!%)%[\*\d\.\$]*L[udi]/) {
 				WARN("PRINTF_L",
 				     "\%Ld/%Lu are not-standard C, use %lld/%llu\n" . $herecurr);
 				last;
 			}
+			if ($string =~ /0x%[\*\d\.\$\Llzth]*[udi]/) {
+				ERROR("PRINTF_0xDECIMAL",
+				      "Prefixing 0x with decimal output is defective\n" . $herecurr);
+			}
 		}
 
 # check for line continuations in quoted strings with odd counts of "