From patchwork Wed Dec 7 19:16:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nathan Chancellor X-Patchwork-Id: 13067545 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3AF9C4708D for ; Wed, 7 Dec 2022 19:17:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229811AbiLGTRl (ORCPT ); Wed, 7 Dec 2022 14:17:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229812AbiLGTRj (ORCPT ); Wed, 7 Dec 2022 14:17:39 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D63FA62C7; Wed, 7 Dec 2022 11:17:36 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 2554BB82010; Wed, 7 Dec 2022 19:17:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F079C433C1; Wed, 7 Dec 2022 19:17:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1670440653; bh=PaMaICE853us6Q/RxDX/uVOJ8q6cqoiuds5087+REG4=; h=From:To:Cc:Subject:Date:From; b=nG+V7WAvUenA6q1s3Z+J11V2G7OvfEnYjsyvCpxR/y/rex62QW4+NAVwlsSy+7Cwc tN3OMIdt7Z/d1dglELXbn1YYNspb8qizAWpDepS6HSEpnCzLH+JrVFFT1a4649yUKR hXsHzOyeNLLzBRzSVAndTERInXpNaSpM5zz4XIijEelI2XkgNZzDGCYGGFJ8q0jLhA iSwUcjqMMFu4XvrVWk8684zISyfwKBo4v5CiAH7PMFV/ZerY7r1pppZd3anLzHbmlK LzbyAsJPis/BwWoCFFiQ3+aaaoD8X1omTIXZGOqrgL/ZsWAeW3huTvRRXlC+DJ5FIf XpTScd+FDPVwg== From: Nathan Chancellor To: Masahiro Yamada Cc: Nick Desaulniers , Tom Rix , Nicolas Schier , Sami Tolvanen , Vincent Donnefort , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, patches@lists.linux.dev, Nathan Chancellor , Steffen Klassert , Daniel Jordan , linux-crypto@vger.kernel.org Subject: [PATCH v2 0/2] Fix lack of section mismatch warnings with LTO Date: Wed, 7 Dec 2022 12:16:55 -0700 Message-Id: <20221207191657.2852229-1-nathan@kernel.org> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Hi all, Vincent recently reported an issue with lack of section mismatch warnings with LTO. This is due to commit 6c730bfc894f ("modpost: handle -ffunction-sections"), which ignores all function sections for modpost. I believe this is incorrect, as these function sections may still refer to symbols in other sections and they will ultimately be coalesced into .text by vmlinux.lds anyways. The first patch fixes a warning that I see with allmodconfig + ThinLTO builds after applying the second patch. The second patch moves ".text.*" into TEXT_SECTIONS so that modpost audits them for mismatches. I expect this to go via the kbuild tree with an ack from the padata maintainers. Cc: Steffen Klassert Cc: Daniel Jordan Cc: linux-crypto@vger.kernel.org v2: - Rework first patch to use __ref for padata_work_init() so that padata_mt_helper() can remain __init (Daniel). Sami, I did not include your tag on this one because it was different enough from what you initially reviewed. - Pick up Alexander's, Sami's, and Vincent's tags on patch 2. v1: https://lore.kernel.org/20221129190123.872394-1-nathan@kernel.org/ Nathan Chancellor (2): padata: Mark padata_work_init() as __ref modpost: Include '.text.*' in TEXT_SECTIONS kernel/padata.c | 4 ++-- scripts/mod/modpost.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) base-commit: 76dcd734eca23168cb008912c0f69ff408905235