From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752167AbdBOUgR (ORCPT ); Wed, 15 Feb 2017 15:36:17 -0500 Received: from smtprelay0035.hostedemail.com ([216.40.44.35]:38389 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751357AbdBOUgQ (ORCPT ); Wed, 15 Feb 2017 15:36:16 -0500 X-Session-Marker: 6A6F6540706572636865732E636F6D X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,joe@perches.com,:::::::::::::,RULES_HIT:41:355:379:541:599:800:960:973:988:989:1260:1277:1311:1313:1314:1345:1359:1373:1437:1515:1516:1518:1534:1540:1593:1594:1711:1730:1747:1777:1792:2393:2559:2562:2828:3138:3139:3140:3141:3142:3352:3622:3865:3867:3870:4250:4321:5007:10004:10400:10848:11026:11232:11658:11914:12043:12048:12294:12740:12760:12895:13069:13311:13357:13439:14181:14659:14721:21080:21434:21451:30054:30091,0,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,LFtime:2,LUA_SUMMARY:none X-HE-Tag: field29_8d9cc96a82028 X-Filterd-Recvd-Size: 1731 Message-ID: <1487190971.6214.66.camel@perches.com> Subject: Re: [PATCH] uapi: fix linux/btrfs.h userspace compilation error From: Joe Perches To: "Dmitry V. Levin" , David Sterba , Josef Bacik , Jeff Mahoney , Liu Bo , Anand Jain Cc: linux-kernel@vger.kernel.org Date: Wed, 15 Feb 2017 12:36:11 -0800 In-Reply-To: <20170215200259.GA1028@altlinux.org> References: <20170215200259.GA1028@altlinux.org> Content-Type: text/plain; charset="ISO-8859-1" X-Mailer: Evolution 3.22.3-0ubuntu0.1 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 On Wed, 2017-02-15 at 23:02 +0300, Dmitry V. Levin wrote: > Stop using NULL to fix the following linux/btrfs.h userspace compilation > error: > > /usr/include/linux/btrfs.h: In function 'btrfs_err_str': > /usr/include/linux/btrfs.h:740:11: error: 'NULL' undeclared (first use in this function) > return NULL; > > Signed-off-by: Dmitry V. Levin > --- > include/uapi/linux/btrfs.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h [] > @@ -737,7 +737,7 @@ static inline char *btrfs_err_str(enum btrfs_err_code err_code) > return "add/delete/balance/replace/resize operation "\ > "in progress"; > default: > - return NULL; > + return 0; Perhaps to avoid some other warnings this might be better return (void *)0;