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=-17.8 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 B64EAC433E7 for ; Wed, 2 Sep 2020 22:59:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9007620767 for ; Wed, 2 Sep 2020 22:59:33 +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="LywCHlL4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727024AbgIBW7b (ORCPT ); Wed, 2 Sep 2020 18:59:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34542 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726310AbgIBW7X (ORCPT ); Wed, 2 Sep 2020 18:59:23 -0400 Received: from mail-qv1-xf4a.google.com (mail-qv1-xf4a.google.com [IPv6:2607:f8b0:4864:20::f4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D33FC061244 for ; Wed, 2 Sep 2020 15:59:23 -0700 (PDT) Received: by mail-qv1-xf4a.google.com with SMTP id p20so763992qvl.4 for ; Wed, 02 Sep 2020 15:59:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=DEB6TvuVII/idft8ojQbZbBbLRj/1UgvcgJGiXc75DA=; b=LywCHlL4O+6VwnFigc/9CULmKPvOxHgK8BrhVH1f5ogLcujoakUmDuTrNs9OZ6N+SD h7E5Xk2GRr7a5bcVmRtDkBZDcTB5AkYIdpIbZtqaYWeszbAcypKwa2i0VDbbYX327Gzf PY7BmAsuU0/mT+YVDZCX7IoiMNyre9s/CkXo1PkHlrRTpIBc6ZPrk6EI5z8NSGmza4VJ 4JlqRHC4yA5dqNEAV5Zr9wLP1Nw50rRgTPx9+fN5dPfxJmYG23gab5qlMifc3ZVfBxwD zBJ3Zn1/20hnoEJ+Mn6inXjv9Dofrl5E9hC631YE8jpARM0nJuvgEuXU57dCAfYNDwSF G5hQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=DEB6TvuVII/idft8ojQbZbBbLRj/1UgvcgJGiXc75DA=; b=c07+Mswas5YhU3O6/8zm1mpCbPYH76hTF+A5U5WHsNWZFmGT0n16Xvn1d2qoG06Kf7 9KCTkK0pqM1+KOjYVuBgsKeuh7h8VvgO5C1HS2zKsF8uWz4vPmyDEK3Ce48q+UGr6TLc SCXKiMivxBC/MRWZXpn9lMuJOS0FcUAHz51qngvadAwWBhNk1x7jjU06sfytE+ivxayL UCq1xc9RUSyNQFBAGAFYALAIZT9Z8PWctAYYTGjt7/ENftPzXnSpUsz8xEcdVwDJbaAs 5vil9hZQw67z3aQvVbuCg4JXa4xqGQDvznWWlNh6Vqyk2gQRko+vIYxWRqdyJhhDDnvC 9D/Q== X-Gm-Message-State: AOAM532EIvJTiJqHaRfd/nBWfXTZuoMzRl97eo0E/XmEEDboblFGh5Ey K78rPg4O96KYKEZ45ixso6rN9Lm0u77mZB87JS8= X-Google-Smtp-Source: ABdhPJzXdwfL/Ab/m1JDmQHIJPs7f0xUTVMOsOO5/Y/GVHSp7Nn75c2TGyacSDW5eFv7gNGGQWiff3uCFBgeOtKV+nA= X-Received: from ndesaulniers1.mtv.corp.google.com ([2620:15c:211:202:f693:9fff:fef4:4d25]) (user=ndesaulniers job=sendgmr) by 2002:a0c:c98d:: with SMTP id b13mr761758qvk.1.1599087562611; Wed, 02 Sep 2020 15:59:22 -0700 (PDT) Date: Wed, 2 Sep 2020 15:59:05 -0700 In-Reply-To: <20200902225911.209899-1-ndesaulniers@google.com> Message-Id: <20200902225911.209899-2-ndesaulniers@google.com> Mime-Version: 1.0 References: <20200902225911.209899-1-ndesaulniers@google.com> X-Mailer: git-send-email 2.28.0.402.g5ffc5be6b7-goog Subject: [PATCH v3 1/7] compiler-clang: add build check for clang 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 During Plumbers 2020, we voted to just support the latest release of Clang for now. Add a compile time check for this. We plan to remove workarounds for older versions now, which will break in subtle and not so subtle ways. Suggested-by: Sedat Dilek Suggested-by: Nathan Chancellor Suggested-by: Kees Cook Signed-off-by: Nick Desaulniers Tested-by: Sedat Dilek Reviewed-by: Kees Cook Reviewed-by: Miguel Ojeda Reviewed-by: Sedat Dilek Acked-by: Marco Elver Acked-by: Nathan Chancellor Acked-by: Sedat Dilek Link: https://github.com/ClangBuiltLinux/linux/issues/9 Link: https://github.com/ClangBuiltLinux/linux/issues/941 --- include/linux/compiler-clang.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h index cee0c728d39a..230604e7f057 100644 --- a/include/linux/compiler-clang.h +++ b/include/linux/compiler-clang.h @@ -3,6 +3,14 @@ #error "Please don't include directly, include instead." #endif +#define CLANG_VERSION (__clang_major__ * 10000 \ + + __clang_minor__ * 100 \ + + __clang_patchlevel__) + +#if CLANG_VERSION < 100001 +# error Sorry, your version of Clang is too old - please use 10.0.1 or newer. +#endif + /* Compiler specific definitions for Clang compiler */ /* same as gcc, this was present in clang-2.6 so we can assume it works -- 2.28.0.402.g5ffc5be6b7-goog