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=-6.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 16CA6C433E6 for ; Mon, 15 Mar 2021 10:38:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D1ADA64E64 for ; Mon, 15 Mar 2021 10:38:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229767AbhCOKhx (ORCPT ); Mon, 15 Mar 2021 06:37:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:39332 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229510AbhCOKhn (ORCPT ); Mon, 15 Mar 2021 06:37:43 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6C7B264E99 for ; Mon, 15 Mar 2021 10:37:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1615804663; bh=2mcHhZunRKf2pmIpcWDF+bT3l2pBE1Mu9v+bAsSeGtM=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=anErYdfWRebdGgyAQP81stOM2EW0gCWrxMqwIQsW4tFePzwJrPudELQocw8RWMnEq dRGcW1Yy/mXcvJ0FtlacLHDtSxQKNQ0xsTu6wmpqw7dn9CxrHGIs0GFXsbiXm8mT2v 6aPVFoMHPCfiraEKUZvUrJsH8i2r0zRCDX39OvVpNCJyUCgoK/Vd8w0v5VNDdDdxPo joCXkfapb7vlp3Mb9HzjB87VYmwmYwnYG/taDHTKidrbW/l70kvsL3g0kpqUzLsQm/ /V8HdEz4eX2EM7pu9I0r4GpukPtamkWSXsFBsVgm5MFc6ZE6nhoQ8h75dG791vq6zt Nq3hkl9fODarQ== Received: by mail-ot1-f53.google.com with SMTP id o19-20020a9d22130000b02901bfa5b79e18so4864045ota.0 for ; Mon, 15 Mar 2021 03:37:43 -0700 (PDT) X-Gm-Message-State: AOAM530l0KPO/RgRTWSaBoZSs0TydYLinKy5XYFXv6vlKBv0bX5VvC/p nNu2LChSfPp9SEZ+JpCyn2h9I7F7ngWUiYVU2Dg= X-Google-Smtp-Source: ABdhPJyP/pA6L3VF3Pp9cT0gjhRXg0wKy6LW1DKr2fmVN1B5EdahDUOquP7El2eUy7JtqWXiwbIkUrCpOWMLb3L5UL4= X-Received: by 2002:a9d:6e15:: with SMTP id e21mr13403906otr.77.1615804662665; Mon, 15 Mar 2021 03:37:42 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Ard Biesheuvel Date: Mon, 15 Mar 2021 11:37:31 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: ARCH=arm LLVM_IAS=1 patches for 5.10, 5.4, and 4.19 To: Greg KH Cc: Sasha Levin , Nick Desaulniers , "# 3.4.x" , clang-built-linux , Jian Cai , Stefan Agner , Catalin Marinas , Sami Tolvanen , candle.sun@unisoc.com, =?UTF-8?B?TWlsZXMgQ2hlbiAo6Zmz5rCR5qi6KQ==?= , Stephen Hines , Luis Lozano , Sandeep Patil , Marc Zyngier Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Mon, 15 Mar 2021 at 10:16, Greg KH wrote: > > On Mon, Mar 15, 2021 at 10:12:31AM +0100, Greg KH wrote: > > On Mon, Mar 15, 2021 at 10:08:49AM +0100, Greg KH wrote: > > > On Fri, Mar 12, 2021 at 11:07:39PM -0500, Sasha Levin wrote: > > > > On Fri, Mar 12, 2021 at 09:28:56AM -0800, Nick Desaulniers wrote: > > > > > My mistake, meant to lop those last two commits off of 4.19.y, they > > > > > were the ones I referred to earlier working their way through the ARM > > > > > maintainers tree. Regenerated the series' (rather than edit the patch > > > > > files) additionally with --base=auto. Re-attached. > > > > > > > > Queued up, thanks! > > > > > > This series seems to cause build breakages in a lot of places, so I'm > > > going to drop the whole set of them now: > > > https://lore.kernel.org/r/be846d89-ab5a-f02a-c05e-1cd40acc5baa@roeck-us.net > > > and: > > > https://lore.kernel.org/r/066efc42-0788-8668-2ff5-d431e77068b5@roeck-us.net > > > > > > Nick, if you want these merged, can you fix up the errors and resend? > > > > > > Perhaps you might want to run these through the tuxbuild tool before > > > sending? You should have access to it... > > > > Oops, wait, they are fine for 5.10.y, just 4.19 and 5.4 are broken, will > > go drop those patches only. > > Also, these are a lot of churn for 5.4 and 4.19, I'm not convinced it's > really needed there. Why again is this required? > I think backporting this stuff is causing more problems than it solves. Note that the 5.4 Thumb2 build is still broken today because it carries eff8728fe698 vmlinux.lds.h: Add PGO and AutoFDO input sections but does not carry f77ac2e378be ARM: 9030/1: entry: omit FP emulation for UND exceptions taken in kernel mode which is tagged as a fix for the former patch, and landed in v5.11. (Side question: anyone have a clue why the patch in question was never selected for backporting?) So I really think we should apply more caution here, and have a *really* good story on why it is essential that these patches are backported. In this case, I am not convinced there is one. -- Ard.