From patchwork Wed Jun 24 20:31:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11624191 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C7668913 for ; Wed, 24 Jun 2020 20:33:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B06B02145D for ; Wed, 24 Jun 2020 20:33:27 +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 S2406554AbgFXUd1 (ORCPT ); Wed, 24 Jun 2020 16:33:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406539AbgFXUdY (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 14BFCC0613ED for ; Wed, 24 Jun 2020 13:33:24 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id f130so3481945yba.9 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=XshDs7sW50Ovq9axh5u1IraZLndrFVhSSBwACZNumzswpkuJ2P+0WZOVcj1BRCtj1S WHhcB+Ra0tUwCD7SlgsMvxzdwzGie8RtUg07mMUpki++Mup60UPZTKzWFhdjUxIzD260 hT02r0cpWvpJ9DGipW4pgG3FtuZvcy4fTSo22t3YlcYfY5Gvh9IgdEhlWtEkty7AX9Qr 8VuYVMXojeJUiQU3YBS1rrh8CFn2i8T6INYjhAmBhzZ0tVaSpMzJp69vQZoIsWbgZHxS W7mAWz2Ui9KRef9PSfkjxLqtYUrR/oILqJY39SdB+uot+4I6+siYf2opu0E7Dls+D4yL HbFQ== X-Gm-Message-State: AOAM532yZl+EXOz3jVMBqY9RKVFLjoXxoSpwP8I0qF+t1qx6fOmYQLPh +ebV8ie1DiUrTkQfYmowKHhiFnf8QIPEgMbhC98= 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 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@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.