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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 E6E51C2BA83 for ; Fri, 14 Feb 2020 17:23:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C3CA220637 for ; Fri, 14 Feb 2020 17:23:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581700982; bh=ELlkIfK1/ej71TQAufGUncCZGSmrKBDD0FiRlst3Jtk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wSD8zzKbVd8LRO6fUOdvvnGYKlVLUyMHATHtYD25dwV+Dkrv0hBPCrOSzuV2xqBqX X42xv9rp3mMuM8zS/zhGD58OO8vMYAVT831If26rSlek6Hd87lRBbuKcRxZlvOyqOC 8oXLgtOLschXRYqOs9QeBwVZJJAjzPXU3PG0dpe8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393131AbgBNRXC (ORCPT ); Fri, 14 Feb 2020 12:23:02 -0500 Received: from mail.kernel.org ([198.145.29.99]:34570 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391340AbgBNQJo (ORCPT ); Fri, 14 Feb 2020 11:09:44 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 634B42468A; Fri, 14 Feb 2020 16:09:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696584; bh=ELlkIfK1/ej71TQAufGUncCZGSmrKBDD0FiRlst3Jtk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YvOiW7OH21gtfGypri/q33jZDJbH8eQBwW/B2fDF6WmlbEvox5N3dW9T+aQGk8S9J 2S0IXXIv0TD8RMLlBQ/OTqzda4prArvrC8d+T6IwKFECeOhAMIwQ5UT1WqzE8xSLGI qkd97fj7mZGufW68RBfQzqNQLg5JS0v7+JW+WGQE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Vasily Gorbik , Heiko Carstens , Sasha Levin , linux-s390@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH AUTOSEL 5.4 372/459] s390: adjust -mpacked-stack support check for clang 10 Date: Fri, 14 Feb 2020 11:00:22 -0500 Message-Id: <20200214160149.11681-372-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214160149.11681-1-sashal@kernel.org> References: <20200214160149.11681-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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