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=-6.8 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 C2A50C433E6 for ; Tue, 1 Sep 2020 00:23:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9BAD72145D for ; Tue, 1 Sep 2020 00:23:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="rVVSYY3/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726173AbgIAAXd (ORCPT ); Mon, 31 Aug 2020 20:23:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55446 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725872AbgIAAXc (ORCPT ); Mon, 31 Aug 2020 20:23:32 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7587CC061573 for ; Mon, 31 Aug 2020 17:23:32 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id o16so179967ybe.8 for ; Mon, 31 Aug 2020 17:23:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=NEi5SY5avnbdRDKWM6EkMbB9CYf2qgLLnorTM1MWHus=; b=rVVSYY3/7bGkSisltWS7LTEuDoxZTUtYDTG6fiC1A2JdGxyVJcz25weD53cbc7nbhw COqtL/ji6xKg+PjkWLuv2xh+LODFH2E4Q6oMlPn7I3ebDC3xVw7+rtqfV4WhK7aAekxx OpN2iroTjKwbjk/7Eopfs8qqP/fSPd22wCzsUYRNN8BjGdWFTxRG5Ge3b3qJ2mbWTKwn c2prJuXrfHRZP0f5v+N8WkC0rEw+0wAvh2n6M/HEYJdqVQd4noDC0yyMENwDVg1miLPU YoEZWfqeykUK9//6AIRnoHLp2rak/P0mrVNYC4pFDP+ASatFXQiFIoigTQNlgodHlWPK QGZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=NEi5SY5avnbdRDKWM6EkMbB9CYf2qgLLnorTM1MWHus=; b=REm5JiHplpIkZONjSl1hsMnmDWYMCUuD8+kzl5kvPrMjoFaIrZIO8bLhEHRnJzCCIe BfPMauew6y8ruxpIumY/S9CPZhQdonxj6obntUKpKEGo3BwVcp7FaraxQk9G5moHBLB9 eRhCdy3SJN2hLzWov75yOBEqn+DpSXA8FGNgbijIU7ownwnk8FHz7Gm0ESY3+Ccd/BDF 20AaULxVgkVbAuYqPSEVYdR1Eavayu7K2e0B4kxkuPc5bjRlaF1s5R3tjvIp0f621zJ7 A40U4jSfFAKvRYIr1RaChdCBYmqjVaHSkHMa9XGZ04X9/uCY7vYT2oQH/0cMAzQZwBAx aaUw== X-Gm-Message-State: AOAM533UjMcFMFPpnRr9ObuRKCXD9kriETsT4cYgN1umQ0pEfvqzY2Ee 11iRMVgjtkq9ZIyFsxbIZ3/KlMwiFNEDPzGSJXc= X-Google-Smtp-Source: ABdhPJw5hScYOdiK6tdHyX+jSfRjvP8SrGOXGcVVoZitQU5liu210XuiGzC84PRxVEmbKYHp0iot1a0E52po9gC5FCI= X-Received: from ndesaulniers1.mtv.corp.google.com ([2620:15c:211:202:f693:9fff:fef4:4d25]) (user=ndesaulniers job=sendgmr) by 2002:a25:32c7:: with SMTP id y190mr6412975yby.441.1598919811518; Mon, 31 Aug 2020 17:23:31 -0700 (PDT) Date: Mon, 31 Aug 2020 17:23:19 -0700 Message-Id: <20200901002326.1137289-1-ndesaulniers@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.28.0.402.g5ffc5be6b7-goog Subject: [PATCH v2 0/7] set clang minimum version to 10.0.1 From: Nick Desaulniers To: Andrew Morton Cc: Kees Cook , Miguel Ojeda , Nathan Chancellor , Sedat Dilek , Marco Elver , Andrey Konovalov , Masahiro Yamada , clang-built-linux@googlegroups.com, Daniel Borkmann , Alexei Starovoitov , Will Deacon , Vincenzo Frascino , linux-kernel@vger.kernel.org, Nick Desaulniers Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adds a compile time #error to compiler-clang.h setting the effective minimum supported version to clang 10.0.1. A separate patch has already been picked up into the Documentation/ tree also confirming the version. Next are a series of reverts. One for 32b arm is a partial revert. Then Marco suggested fixes to KASAN docs. Finally, improve the warning for GCC too as per Kees. Patches after 001 are new for v2. Marco Elver (1): kasan: Remove mentions of unsupported Clang versions Nick Desaulniers (6): compiler-clang: add build check for clang 10.0.1 Revert "kbuild: disable clang's default use of -fmerge-all-constants" Revert "arm64: bti: Require clang >= 10.0.1 for in-kernel BTI support" Revert "arm64: vdso: Fix compilation with clang older than 8" Partial revert "ARM: 8905/1: Emit __gnu_mcount_nc when using Clang 10.0.0 or newer" compiler-gcc: improve version warning Documentation/dev-tools/kasan.rst | 4 ++-- Makefile | 9 --------- arch/arm/Kconfig | 2 +- arch/arm64/Kconfig | 2 -- arch/arm64/kernel/vdso/Makefile | 7 ------- include/linux/compiler-clang.h | 8 ++++++++ include/linux/compiler-gcc.h | 2 +- lib/Kconfig.kasan | 9 ++++----- 8 files changed, 16 insertions(+), 27 deletions(-) -- 2.28.0.402.g5ffc5be6b7-goog