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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 29995C35640 for ; Fri, 21 Feb 2020 08:23:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D9F9E2467D for ; Fri, 21 Feb 2020 08:23:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582273394; bh=hoSFGmctaTzSSVStkDlRbN6DIPzYVjHFy5EUE2RbAa8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Nllhxnwb0A3Yk9yBd7Hv1Pw5bC2mJGVVrmYx3Js6Imjff8jgUCDG5kMxFx0VQrfpN ea8Rz/lcmsSEOfd1fYu61tgUtlGeS27Mj3D2qkRc/VRN+vDnXMjrxeSb6DPongsYkx CzAIOr4io1qxNMhm1/hDaDxYsYys8L63P/UkpPNM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388444AbgBUIXM (ORCPT ); Fri, 21 Feb 2020 03:23:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:35126 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388431AbgBUIXL (ORCPT ); Fri, 21 Feb 2020 03:23:11 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 341E324676; Fri, 21 Feb 2020 08:23:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582273390; bh=hoSFGmctaTzSSVStkDlRbN6DIPzYVjHFy5EUE2RbAa8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dOqGVIvW6VFjpd4HmQmDMPuwrjXb/L60T3K0qFrbPnlbxGp602PlEePhsi1FyC4kM ao4Q3H2Y99SerdXXLJn7DH2HOU0LUR5KFHd+rp35UVT+TXb1APIXgMd1oa7vdGm0gX BrHH+9u032mkmAmj1pL9NN6noJmUa337v3z7EYTA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Sasha Levin Subject: [PATCH 4.19 153/191] s390: adjust -mpacked-stack support check for clang 10 Date: Fri, 21 Feb 2020 08:42:06 +0100 Message-Id: <20200221072309.140906328@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200221072250.732482588@linuxfoundation.org> References: <20200221072250.732482588@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vasily Gorbik [ Upstream commit 253b3c4b2920e07ce9e2b18800b9b65245e2fafa ] clang 10 introduces -mpacked-stack compiler option implementation. At the same time currently it does not support a combination of -mpacked-stack and -mbackchain. This leads to the following build error: clang: error: unsupported option '-mpacked-stack with -mbackchain' for target 's390x-ibm-linux' If/when clang adds support for a combination of -mpacked-stack and -mbackchain it would also require -msoft-float (like gcc does). According to Ulrich Weigand "stack slot assigned to the kernel backchain overlaps the stack slot assigned to the FPR varargs (both are required to be placed immediately after the saved r15 slot if present)." Extend -mpacked-stack compiler option support check to include all 3 options -mpacked-stack -mbackchain -msoft-float which must present to support -mpacked-stack with -mbackchain. Acked-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Sasha Levin --- arch/s390/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/Makefile b/arch/s390/Makefile index e6c2e8925fefa..4bccde36cb161 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -63,7 +63,7 @@ cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include # cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls -ifeq ($(call cc-option-yn,-mpacked-stack),y) +ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y) cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK endif -- 2.20.1