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=-10.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,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 DB23CC43387 for ; Fri, 11 Jan 2019 14:39:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ACD4C21841 for ; Fri, 11 Jan 2019 14:39:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547217542; bh=Mgx1R0P15xDM8hFM22ILjxRR+An+yQ0KvW1dx6qP1nc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ryk+7aGFHXdc8dZPp1oltN9nonYLlJczfJfvdJybvG/GzxdQsG9kfo38gvI0qX8O0 B7iGPhADlFTrfpA+uIasxKX48RXLAQ3xn8qVviQnzuWh9M1zmJPoF4lK0PkTuEOaeH qn5p4fQ7Mi4G3it9OhrkKaXk4Cbw22WdK9rleZkM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403765AbfAKOjA (ORCPT ); Fri, 11 Jan 2019 09:39:00 -0500 Received: from mail.kernel.org ([198.145.29.99]:59654 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390949AbfAKOiy (ORCPT ); Fri, 11 Jan 2019 09:38:54 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 31CC1206B6; Fri, 11 Jan 2019 14:38:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547217533; bh=Mgx1R0P15xDM8hFM22ILjxRR+An+yQ0KvW1dx6qP1nc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=skx7DHhw544KB4JKwjLwIOOikef/3IF3y4Y4U0qe1+lp2dFMGnIUD230Gd3VPFpKc cRP4DiT51lqozyLE8afH4+VyUBy+uZjNQf3gEkGAGHskRYzc21MhTCv6fFxJN8q0wv cJhOwT9ZOEX1uiWFir0H8JetrnRuOfmuDAmWtnFs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Joel Stanley , Nick Desaulniers , Michael Ellerman , Nathan Chancellor Subject: [PATCH 4.19 095/148] powerpc: Disable -Wbuiltin-requires-header when setjmp is used Date: Fri, 11 Jan 2019 15:14:33 +0100 Message-Id: <20190111131118.033663291@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190111131114.337122649@linuxfoundation.org> References: <20190111131114.337122649@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Joel Stanley commit aea447141c7e7824b81b49acd1bc785506fba46e upstream. The powerpc kernel uses setjmp which causes a warning when building with clang: In file included from arch/powerpc/xmon/xmon.c:51: ./arch/powerpc/include/asm/setjmp.h:15:13: error: declaration of built-in function 'setjmp' requires inclusion of the header [-Werror,-Wbuiltin-requires-header] extern long setjmp(long *); ^ ./arch/powerpc/include/asm/setjmp.h:16:13: error: declaration of built-in function 'longjmp' requires inclusion of the header [-Werror,-Wbuiltin-requires-header] extern void longjmp(long *, long); ^ This *is* the header and we're not using the built-in setjump but rather the one in arch/powerpc/kernel/misc.S. As the compiler warning does not make sense, it for the files where setjmp is used. Signed-off-by: Joel Stanley Reviewed-by: Nick Desaulniers [mpe: Move subdir-ccflags in xmon/Makefile to not clobber -Werror] Signed-off-by: Michael Ellerman Signed-off-by: Nathan Chancellor Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/kernel/Makefile | 3 +++ arch/powerpc/xmon/Makefile | 5 ++++- 2 files changed, 7 insertions(+), 1 deletion(-) --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -5,6 +5,9 @@ CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"' +# Disable clang warning for using setjmp without setjmp.h header +CFLAGS_crash.o += $(call cc-disable-warning, builtin-requires-header) + subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror ifdef CONFIG_PPC64 --- a/arch/powerpc/xmon/Makefile +++ b/arch/powerpc/xmon/Makefile @@ -1,7 +1,10 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for xmon -subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror +# Disable clang warning for using setjmp without setjmp.h header +subdir-ccflags-y := $(call cc-disable-warning, builtin-requires-header) + +subdir-ccflags-$(CONFIG_PPC_WERROR) += -Werror GCOV_PROFILE := n UBSAN_SANITIZE := n