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 99BCBC2BA83 for ; Fri, 14 Feb 2020 17:02:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 63AEE20656 for ; Fri, 14 Feb 2020 17:02:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581699765; bh=hoSFGmctaTzSSVStkDlRbN6DIPzYVjHFy5EUE2RbAa8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=s6L26ouYuhIDce2Gh1ht03CVqEwsafyhv5Fz0JgU4oCOT3Pu1PViPtY7nQH4k8YKf WUK/N2NC4a9Z9CQ1heHgUQ778eh6JoeBjkgaBAKtTzbCz3A/9w3+DU3STdv/NlYBUD RD5Pdhhadjra9d+3PmTVE3FUCdjT/QWJJGPGSXyQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394423AbgBNRCo (ORCPT ); Fri, 14 Feb 2020 12:02:44 -0500 Received: from mail.kernel.org ([198.145.29.99]:46666 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404205AbgBNQQE (ORCPT ); Fri, 14 Feb 2020 11:16:04 -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 3E3B1246F0; Fri, 14 Feb 2020 16:16:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696964; bh=hoSFGmctaTzSSVStkDlRbN6DIPzYVjHFy5EUE2RbAa8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wphf8WR8btfYVAt449la7yNKQMHFZk0Waw8RBfcsVKMZjdJKrFQvr3MEu1WhZ19+m zbQNpiT/kJOs0dsJtBt7YbNmBARq9qLUu2Qkd+/GKuaWdf7WvXnbQwTTHSM9fLSsTB gxP3D57rgwKP/zdcGABrZb89uJmap+hWHo3ktBfY= 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 4.19 203/252] s390: adjust -mpacked-stack support check for clang 10 Date: Fri, 14 Feb 2020 11:10:58 -0500 Message-Id: <20200214161147.15842-203-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214161147.15842-1-sashal@kernel.org> References: <20200214161147.15842-1-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 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