From patchwork Mon Aug 6 13:17:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasily Gorbik X-Patchwork-Id: 10557105 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 39B7C15A6 for ; Mon, 6 Aug 2018 13:18:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 279582949B for ; Mon, 6 Aug 2018 13:18:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 19E53294CF; Mon, 6 Aug 2018 13:18:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B267E2949B for ; Mon, 6 Aug 2018 13:18:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732646AbeHFP04 (ORCPT ); Mon, 6 Aug 2018 11:26:56 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:47662 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729660AbeHFP0z (ORCPT ); Mon, 6 Aug 2018 11:26:55 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w76DE8BK029249 for ; Mon, 6 Aug 2018 09:17:51 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0b-001b2d01.pphosted.com with ESMTP id 2kpp7psxyd-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 06 Aug 2018 09:17:49 -0400 Received: from localhost by e06smtp02.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) Mon, 6 Aug 2018 14:17:43 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w76DHgo833423488 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 6 Aug 2018 13:17:42 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0D16152059; Mon, 6 Aug 2018 16:17:51 +0100 (BST) Received: from localhost (unknown [9.152.212.144]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id B8A5D52050; Mon, 6 Aug 2018 16:17:50 +0100 (BST) Date: Mon, 6 Aug 2018 15:17:41 +0200 From: Vasily Gorbik To: Masahiro Yamada , Michal Marek , Martin Schwidefsky , Heiko Carstens , Steven Rostedt , Ingo Molnar Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, Andi Kleen Subject: [PATCH 0/4] ftrace build improvements MIME-Version: 1.0 Content-Disposition: inline X-TM-AS-GCONF: 00 x-cbid: 18080613-0008-0000-0000-0000025DAFD8 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18080613-0009-0000-0000-000021C45FF8 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-06_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=521 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808060141 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Support for -fentry -mrecord-mcount and -mnop-mcount has been added for s390 in gcc master branch. An attempt to build 4.18 for s390 with that gcc would produce a kernel with no __mcount_loc though because of the new condition in scripts/Makefile.build:210 which disables recordmcount tool if compiler supports -mrecord-mcount (s390 relies on combination of -mhotpatch=0,3 gcc flag and recordmcount.pl). This patch series adds s390 ftrace support based on combination of -pg -fentry -mrecord-mcount and -mnop-mcount gcc flags (that fixes issue mentioned above). At the same time this patch series fixes couple of minor issues and adds -mnop-mcount gcc flag support (utilized by s390). Vasily Gorbik (4): trace: handle CC_FLAGS_FTRACE more accurately trace: avoid calling cc-option -mrecord-mcount for every Makefile trace: add -mcount-nop option support s390/ftrace: add -mfentry and -mnop-mcount support Makefile | 24 ++++++++++++++++++++---- arch/s390/Kconfig | 2 ++ arch/s390/Makefile | 16 +++++++++------- arch/s390/include/asm/ftrace.h | 6 +++--- arch/s390/kernel/ftrace.c | 2 +- arch/s390/kernel/mcount.S | 2 +- kernel/trace/Kconfig | 5 +++++ kernel/trace/ftrace.c | 2 ++ scripts/Makefile.build | 9 +++------ 9 files changed, 46 insertions(+), 22 deletions(-)