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=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 E233BC5DF9F for ; Tue, 13 Oct 2020 02:42:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B65CA221EB for ; Tue, 13 Oct 2020 02:42:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="bb3nDFzI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727804AbgJMAev (ORCPT ); Mon, 12 Oct 2020 20:34:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727629AbgJMAdL (ORCPT ); Mon, 12 Oct 2020 20:33:11 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A9D2C0613AB for ; Mon, 12 Oct 2020 17:32:48 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id 140so19392858ybf.2 for ; Mon, 12 Oct 2020 17:32:48 -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=KGusc3+RBCNZzwrkW+3708RrOouUa5FTnw8PnBTY3Ig=; b=bb3nDFzIx4qOjrAxOJ2W8KlT1MSwi986POJ9cJKOfKNUvRnVD7cY4Jz0mSg7MRPV0m lXGeie9Xx5DffV8Za4XM0+PkCWp/NCEYvBCpL7dbWdrPNqfhiC4UEsNhLdH9WWLRAVhu rBrRJaB7DNAvuCtUjCRM0HtqGKgpYPqEp2T0+l16BlXpPCOzksZ+AJZoofJNI/IPVJLU DGaw9KsaIO4EuTukInDUjt34kVBq5g8dbh3CNbZSE7P38c406JgXNG5VZxPiK/gkKrw+ oQSbozkgWh9aNk4C9mJf/hcl8a66+ktKY02krWk3JyMwLeJ56+gSghiqZIoBEYDSxY68 9P+w== 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=KGusc3+RBCNZzwrkW+3708RrOouUa5FTnw8PnBTY3Ig=; b=bxtXi4Uw3LIql0H3gHrfYjDCRAKF/zMsrP4oCYzsdT0vtEEpQjY0fmos3xJOaGujoI SswIL9+MDlhbPBE2YPnzITMJRLlQnDC02IlbsKtG+0qzAA50y5pynvTx98AQYVsjuCI1 RNFxuhuSACn09cqRF4/S+qdAlazWiaXkGlavdvkRlcXV6hN5K18IElGuhco/m3+WPegz sxMSetL6m2GZGPJIT/nOQ/oc9Zag27OzjXYO9vRcDtU8FYQPyHXrAaWAliel9PqqW08N yRYKTx+Q+AH1PI4nhqoxDxT6UL68O0QA2iYb1gnjKpbKop+p6sgoNsxzkzIfGbUM+7MY +qHA== X-Gm-Message-State: AOAM533ACfbBZIFBmEC74nhhZeYr93+tVpN7nW4iLxXIiChqH90SOvXF oyzvLUP4MO29GdqMWlb29QiZI/xfMhBYLY9Id0Q= X-Google-Smtp-Source: ABdhPJxn7XFZrqOn+1+G64/SnDmtkk1LEUGGMAzLxs1dl5s59vyoJo/OwiDLBmXb5P310AefkBc1vWcPP0Py9wbvJGA= Sender: "samitolvanen via sendgmr" X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a25:2689:: with SMTP id m131mr35046414ybm.506.1602549167733; Mon, 12 Oct 2020 17:32:47 -0700 (PDT) Date: Mon, 12 Oct 2020 17:31:57 -0700 In-Reply-To: <20201013003203.4168817-1-samitolvanen@google.com> Message-Id: <20201013003203.4168817-20-samitolvanen@google.com> Mime-Version: 1.0 References: <20201013003203.4168817-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v6 19/25] scripts/mod: disable LTO for empty.c From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt Cc: Will Deacon , Peter Zijlstra , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org With CONFIG_LTO_CLANG, clang generates LLVM IR instead of ELF object files. As empty.o is used for probing target properties, disable LTO for it to produce an object file instead. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- scripts/mod/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index 78071681d924..c9e38ad937fd 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 OBJECT_FILES_NON_STANDARD := y +CFLAGS_REMOVE_empty.o += $(CC_FLAGS_LTO) hostprogs-always-y += modpost mk_elfconfig always-y += empty.o -- 2.28.0.1011.ga647a8990f-goog