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=-20.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 A799AC433ED for ; Tue, 18 May 2021 21:13:29 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DC4B8611BF for ; Tue, 18 May 2021 21:13:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DC4B8611BF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Fl7yb2gJ5z304j for ; Wed, 19 May 2021 07:13:27 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=jW7Z5QSA; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=nathan@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=jW7Z5QSA; dkim-atps=neutral Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Fl7y51VHzz2yWs for ; Wed, 19 May 2021 07:13:01 +1000 (AEST) Received: by mail.kernel.org (Postfix) with ESMTPSA id BDE79611BF; Tue, 18 May 2021 21:12:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621372378; bh=+XwfrEanFh4KN53uNfFPtVzdxotlHS4G0gMOF3X0WWU=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=jW7Z5QSAQBCRP3CKw+PHGutOzM5iOK9y1tHxZ6wz9E3G9YwJphlNGn4YXcrY5VVvU /8G7pnwdxTS8Be9nMmIT4mMf34ma2lXxCrYCifz10pMNCgGPrbq1D3MafdTe0cD180 thyhN50YhNCqhYek5zhBP7w5KqK9BRQO1b6/QgZFq14s/+WJxLlz1TEmrOYMw25STx lwQEf8oR297grjB9ipFruYyE0UgGB830qqXQR6kDeYYSpe/fXNMfZWPiSHYeeOqdeo AjjIYQxIbigYb/4UmQ1iZ1QJrJDC6hULdYEy7tg9dN72d4Km1cerHjsoJHVYejXtSB pFCddv1n/5rnw== Subject: Re: [PATCH] powerpc: Kconfig: disable CONFIG_COMPAT for clang < 12 To: Nick Desaulniers , Michael Ellerman References: <20210518205858.2440344-1-ndesaulniers@google.com> From: Nathan Chancellor Message-ID: Date: Tue, 18 May 2021 14:12:56 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: <20210518205858.2440344-1-ndesaulniers@google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fangrui Song , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Paul Mackerras , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 5/18/2021 1:58 PM, Nick Desaulniers wrote: > Until clang-12, clang would attempt to assemble 32b powerpc assembler in > 64b emulation mode when using a 64b target triple with -m32, leading to > errors during the build of the compat VDSO. Simply disable all of > CONFIG_COMPAT; users should upgrade to the latest release of clang for > proper support. > > Link: https://github.com/ClangBuiltLinux/linux/issues/1160 > Link: https://github.com/llvm/llvm-project/commits/2288319733cd5f525bf7e24dece08bfcf9d0ff9e > Link: https://groups.google.com/g/clang-built-linux/c/ayNmi3HoNdY/m/XJAGj_G2AgAJ > Suggested-by: Nathan Chancellor > Signed-off-by: Nick Desaulniers Reviewed-by: Nathan Chancellor > --- > arch/powerpc/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index ce3f59531b51..2a02784b7ef0 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -289,6 +289,7 @@ config PANIC_TIMEOUT > config COMPAT > bool "Enable support for 32bit binaries" > depends on PPC64 > + depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 > default y if !CPU_LITTLE_ENDIAN > select ARCH_WANT_OLD_COMPAT_IPC > select COMPAT_OLD_SIGACTION >