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 729DDC35641 for ; Fri, 21 Feb 2020 08:13:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4817A24670 for ; Fri, 21 Feb 2020 08:13:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582272793; bh=ELlkIfK1/ej71TQAufGUncCZGSmrKBDD0FiRlst3Jtk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=uqzxBpg9Y19gpQQpDBQOUoEoe2kuekU5U8BDYI64jiyzSauirOmi/D5AfuVr0ZEBT gR97HQtbkpf9QiNU5i2F7F0OP2Up87ffXJbkcJfwtc0EnEhkug8htxo1r2dJak0ViP qZztrdYbML1xk+psvCD4zsRAO9UHH3QtnkVw6ju8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732971AbgBUINM (ORCPT ); Fri, 21 Feb 2020 03:13:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:49192 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732956AbgBUINK (ORCPT ); Fri, 21 Feb 2020 03:13:10 -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 2926620722; Fri, 21 Feb 2020 08:13:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582272789; bh=ELlkIfK1/ej71TQAufGUncCZGSmrKBDD0FiRlst3Jtk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eA7jzuuIUjxpvG6aMoNgTv2uNQUlqry+mpxa61+mhblzHEbR8dmC9oD3SynG4E7C+ d0yJFHFDey7jq7leHBXLn74MgABbnxQBVuTLhmBvw6GWvspeonIu5B0SgOHQA2Gdss 5W7b8RtvE7Ghi4HjpNPzAXg5HAFM8o9NNXRbSYmo= 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 5.4 276/344] s390: adjust -mpacked-stack support check for clang 10 Date: Fri, 21 Feb 2020 08:41:15 +0100 Message-Id: <20200221072414.810177821@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200221072349.335551332@linuxfoundation.org> References: <20200221072349.335551332@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 478b645b20ddb..9ce1baeac2b25 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -69,7 +69,7 @@ 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