From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27BE9C433FF for ; Tue, 6 Aug 2019 10:57:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0917820679 for ; Tue, 6 Aug 2019 10:57:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732701AbfHFK5Q (ORCPT ); Tue, 6 Aug 2019 06:57:16 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:2256 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730902AbfHFK5Q (ORCPT ); Tue, 6 Aug 2019 06:57:16 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x76AvDWH031831 for ; Tue, 6 Aug 2019 06:57:14 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 2u75nex83s-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 06 Aug 2019 06:57:14 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 6 Aug 2019 11:56:50 +0100 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x76AunAF56754246 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 6 Aug 2019 10:56:49 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9B915A4051; Tue, 6 Aug 2019 10:56:49 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 73193A404D; Tue, 6 Aug 2019 10:56:49 +0000 (GMT) Received: from localhost (unknown [9.152.212.148]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 6 Aug 2019 10:56:49 +0000 (GMT) Date: Tue, 6 Aug 2019 12:56:48 +0200 From: Vasily Gorbik To: Masahiro Yamada Cc: Arnd Bergmann , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] s390/build: use size command to perform empty .bss check References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Patchwork-Bot: notify X-TM-AS-GCONF: 00 x-cbid: 19080610-0012-0000-0000-0000033A8946 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19080610-0013-0000-0000-0000217442AF Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-08-06_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=908 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908060113 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently empty .bss checks performed do not pay attention to "common objects" in object files which end up in .bss section eventually. The "size" tool is a part of binutils and since version 2.18 provides "--common" command line option, which allows to account "common objects" sizes in .bss section size. Utilize "size --common" to perform accurate check that .bss section is unused. Besides that the size tool handles object files without .bss section gracefully and doesn't require additional objdump run. The linux kernel requires binutils 2.20 since 4.13. Kbuild exports OBJSIZE to reference the right size tool. Signed-off-by: Vasily Gorbik --- arch/s390/scripts/Makefile.chkbss | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/s390/scripts/Makefile.chkbss b/arch/s390/scripts/Makefile.chkbss index 884a9caff5fb..ba1d7a8a242f 100644 --- a/arch/s390/scripts/Makefile.chkbss +++ b/arch/s390/scripts/Makefile.chkbss @@ -11,8 +11,7 @@ chkbss: $(addprefix $(obj)/, $(chkbss-files)) quiet_cmd_chkbss = CHKBSS $< cmd_chkbss = \ - if $(OBJDUMP) -h $< | grep -q "\.bss" && \ - ! $(OBJDUMP) -j .bss -w -h $< | awk 'END { if ($$3) exit 1 }'; then \ + if ! $(OBJSIZE) --common $< | awk 'END { if ($$3) exit 1 }'; then \ echo "error: $< .bss section is not empty" >&2; exit 1; \ fi; \ touch $@; -- 2.21.0