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=-17.6 required=3.0 tests=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,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 067FDC433E0 for ; Wed, 24 Jun 2020 20:33:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3C762082F for ; Wed, 24 Jun 2020 20:33:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="QHLFKZjz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406573AbgFXUdc (ORCPT ); Wed, 24 Jun 2020 16:33:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406496AbgFXUdY (ORCPT ); Wed, 24 Jun 2020 16:33:24 -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 16BC2C061795 for ; Wed, 24 Jun 2020 13:33:24 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id p22so3470557ybg.21 for ; Wed, 24 Jun 2020 13:33:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=063/REsTpnFRr+cDI+sseVhgFckW5SG29uiho3UNZTY=; b=QHLFKZjziQv1B4lTQJOFrFkeBBeD3vqMRAW+KU8uSJ0z8P5diTku752ppGYK+p1sHj Tuqj5FmieFc5zewP3DRNS5iM40Pga5Yd012RZ1UJSub9OeGcQ/BjM9Xhswo2S+wawZKA RoZrP4AKzJhPxHnp2kwUEq2iAcWJC9Jvd0o41DT/D0J5C0PT78vt0tH2KpFNFHvjKqOE izzBiEOpzdtuThxfwOEyO+K5m3BsSaqVWi7OpscZsOWnWe/8qa7rh4O22Mfte1SMk6Qe rW+Cnirb92ArG8+1lDPtjHVyv4CvsFhD6/kzdDW605IdVtQymCiQD3WRRYOvRlD/Mv+p 36IQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=063/REsTpnFRr+cDI+sseVhgFckW5SG29uiho3UNZTY=; b=FHbWp0CsPhu2rhZnGQ5a/34SZjeLTrEkJ1fNYoF+nAqcSWVe5+nAjLZlZ02LzOVtr0 rqFp9JAVN/HN1F95NLEj+Ax1rQhbQRD9zn31OVnQzwjFSJIOXWwCgG2EAV8nC6iReN3d 7jWsc90yJkKb+KbkCa9/APgJGD2LYZFhDTEuJf3CsO3P1Hhn6eNm7wc8VtrORY8jxm6a p6z4VQgTUu/HbJGXTvwWQYP7RS5o7lGdbPA5NiDSUMy0ouf4drldsmM9Q6wQJanmwruM irlKk4evst+x05+Kcsl8x3YlL/TWV7ITIHqtC+XKWkIYQV4DaX2R7y6zPBAv3X3VIwkZ AcxQ== X-Gm-Message-State: AOAM532suOYK9H8Jk6DWWkwgDNWcxCGR2fkyH4IfOZjgamPjWYPEtZwa xUzsf2N/RnTjjHrHb5yq6XZTPiTM+D9T4mvIjt4= X-Google-Smtp-Source: ABdhPJxSD93X1bZbMxIVxbatDlNzo+plulwlXrP7mUhDGUyc2zpYsUnUjocqKRL/aFZ9kJnCfhHJEfDbrbY1YJULi70= X-Received: by 2002:a25:e8b:: with SMTP id 133mr46457083ybo.13.1593030803250; Wed, 24 Jun 2020 13:33:23 -0700 (PDT) Date: Wed, 24 Jun 2020 13:31:52 -0700 In-Reply-To: <20200624203200.78870-1-samitolvanen@google.com> Message-Id: <20200624203200.78870-15-samitolvanen@google.com> Mime-Version: 1.0 References: <20200624203200.78870-1-samitolvanen@google.com> X-Mailer: git-send-email 2.27.0.212.ge8ba1cc988-goog Subject: [PATCH 14/22] efi/libstub: disable LTO From: Sami Tolvanen To: Masahiro Yamada , Will Deacon Cc: 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" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With CONFIG_LTO_CLANG, we produce LLVM bitcode instead of ELF object files. Since LTO is not really needed here and the Makefile assumes we produce an object file, disable LTO for libstub. Signed-off-by: Sami Tolvanen --- drivers/firmware/efi/libstub/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 75daaf20374e..95e12002cc7c 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -35,6 +35,8 @@ KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \ # remove SCS flags from all objects in this directory KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) +# disable LTO +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS)) GCOV_PROFILE := n # Sanitizer runtimes are unavailable and cannot be linked here. -- 2.27.0.212.ge8ba1cc988-goog