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=-17.5 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 228B3C433E1 for ; Wed, 26 Aug 2020 20:14:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E42BE2078D for ; Wed, 26 Aug 2020 20:14:37 +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="Cu4SyoKW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726858AbgHZUOh (ORCPT ); Wed, 26 Aug 2020 16:14:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56386 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726734AbgHZUOe (ORCPT ); Wed, 26 Aug 2020 16:14:34 -0400 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D80EC061574 for ; Wed, 26 Aug 2020 13:14:33 -0700 (PDT) Received: by mail-pg1-x54a.google.com with SMTP id 187so2129749pgb.12 for ; Wed, 26 Aug 2020 13:14:33 -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=IinaA3OlAbDYM7J0tIy8taCdI4ZoZL5ZpgInF7cAa5Q=; b=Cu4SyoKWv5V4c9UF3RMRdqzlt5KwAeU44bRELcJ5z8YufoSCSsOxiPK6DVHdAvr8y9 QfzmDUC/4JSakVod3Psg4D4Hx8EWpKy7B7HvlTiqUG8UWA2zGu7brfpmC2atxFWNF0x3 bLAkUHXB6ar17vETQMPxqbk3rf8dG/MUdpg6byUJotxQFITvZMuNwYmTi+FhORlGGqIP /9kKfq4HWrRDarhj/CZrAKukjN4ndm+TAVotyTWrlm5qC6r+QqsDiuP1G7dpmN46qTcN VFFq1pfnebaupXTBt+9ai/ftGLm45e/qyMe7zgri2tktodye7R3oDXPdHFhdHPgQ05yy HtzA== 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=IinaA3OlAbDYM7J0tIy8taCdI4ZoZL5ZpgInF7cAa5Q=; b=qm3vBCp6tDRJXl+KbWUCXb6U69LbFiYPAF1D1/f2bPcUgQ7+522CE0kr5LfSlb4aW6 apN/Nb65C82rV/ykgZOff+If4AEEYi1TiCc3vA39fb4DY32zA23zTdtIQl019LrvYao0 dovdaX+SnEX3/UAg6yD+bFwU8xFRccBFzVqxbqzPQ0s1M5GCXvgRsy/Bqoh3G0QUoeWB X9uNc8lrhULh8uopxd49D0EkTTmYzZ3g6J0L/sc8NC8yY3U6VrXYOdtfl1dj0pv1Z95t /fW1zojxnukN3AokybgHyvOxhHThKZrf9ibH2feek1ij8w79N4+6awodDhh/4u2PQV0g Tqiw== X-Gm-Message-State: AOAM533uBkizjtEgzKjRRByMETQFJ7kKh+LOPaoEj3mNl7c1kh+kgmhM SmGN5YFVSzxhxb4X7vls+5HqWeuN4VbcvQnX8mw= X-Google-Smtp-Source: ABdhPJxq77ulKQSpn7P9+SOIkZQ+nw2m984QaKvuDVUuYrfVwT8NIcZ4Zg/Vk2JvUspHbwU8muAWztCN39FFZze3Nws= X-Received: from ndesaulniers1.mtv.corp.google.com ([2620:15c:211:202:f693:9fff:fef4:4d25]) (user=ndesaulniers job=sendgmr) by 2002:a62:7d4c:: with SMTP id y73mr10660609pfc.137.1598472872538; Wed, 26 Aug 2020 13:14:32 -0700 (PDT) Date: Wed, 26 Aug 2020 13:14:19 -0700 Message-Id: <20200826201420.3414123-1-ndesaulniers@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.28.0.297.g1956fa8f8d-goog Subject: [PATCH] compiler-clang: add build check for clang 10.0.1 From: Nick Desaulniers To: Andrew Morton Cc: Nick Desaulniers , Sedat Dilek , Nathan Chancellor , Miguel Ojeda , Kees Cook , Marco Elver , "Paul E. McKenney" , "Peter Zijlstra (Intel)" , Randy Dunlap , Ingo Molnar , Sami Tolvanen , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com 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. Older clang's may work, but we will likely drop workarounds for older versions. Link: https://github.com/ClangBuiltLinux/linux/issues/9 Link: https://github.com/ClangBuiltLinux/linux/issues/941 Suggested-by: Sedat Dilek Signed-off-by: Nick Desaulniers --- 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..7338d3ffd240 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 compiler is too old - please upgrade it. +#endif + /* Compiler specific definitions for Clang compiler */ /* same as gcc, this was present in clang-2.6 so we can assume it works -- 2.28.0.297.g1956fa8f8d-goog