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 AFCE9C35641 for ; Fri, 21 Feb 2020 08:40:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 829442073A for ; Fri, 21 Feb 2020 08:40:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582274431; bh=SsNL5MnR4n7Jo/4O0AhUOyWnChUJgbvbffrPq0oW3sA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xMsHFdUFUMU67CYGaSv0ldq80efTiS04iRYboxXqjAITh1PqjNi5v1fyf1yEKgb9/ G9Ceuw6uDY6Orfwo2KacGakhIvuWVK4v40egSd3jKOv2HpQUqxdGgpxXO169LhXuB6 ujldMsVgTO1ULIK+Kx2IBbEJUs0Itkcz6FafMxaY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731433AbgBUIka (ORCPT ); Fri, 21 Feb 2020 03:40:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:59016 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730376AbgBUH7C (ORCPT ); Fri, 21 Feb 2020 02:59:02 -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 0CBF8206ED; Fri, 21 Feb 2020 07:59:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582271941; bh=SsNL5MnR4n7Jo/4O0AhUOyWnChUJgbvbffrPq0oW3sA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JHlE/Q7mdKhYzwfWyfIsLHAAlGmW6cNehGoIx2m76CnsoB0klhganHtTK8eV1A87r fFjnDVHPUFMeHTuShMnve6XEiv8++IV17GB4LI3ASm+H46aYWAGmpo/Gx1Udd/R5Mt aoq7Qn1IJy6AND+mR4QbuV8a5olgbZgpz+CASiQQ= 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 5.5 319/399] s390: adjust -mpacked-stack support check for clang 10 Date: Fri, 21 Feb 2020 08:40:44 +0100 Message-Id: <20200221072432.406329018@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200221072402.315346745@linuxfoundation.org> References: <20200221072402.315346745@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 ba8556bb0fb15..e0e3a465bbfd6 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