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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 DE1CCC433E0 for ; Fri, 3 Jul 2020 03:32:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3D9D20B1F for ; Fri, 3 Jul 2020 03:32:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593747163; bh=cY3ZXCphbp6Bd6g8eTIXgPjm8svRdi8PK6+pdgEY2Eg=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=Yusbwz0JakPBmOHrmduzae704C+gSoR5U1WSdkX0oOQzVGa2Zjd8VI3jDlmjg32V4 4lBrmECZyS1k6qiH5Ly6McRk0jzt06F/kmPlA1tnq8A0r1J4uNNVsAb2BVEBGWgAtf xcFG7KGGcqL6FL0JezxXArsipvF1ShCoDkUn2Voc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726100AbgGCDcm (ORCPT ); Thu, 2 Jul 2020 23:32:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55332 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725937AbgGCDcm (ORCPT ); Thu, 2 Jul 2020 23:32:42 -0400 Received: from mail-lf1-x141.google.com (mail-lf1-x141.google.com [IPv6:2a00:1450:4864:20::141]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98A2DC08C5C1 for ; Thu, 2 Jul 2020 20:32:41 -0700 (PDT) Received: by mail-lf1-x141.google.com with SMTP id g139so17566924lfd.10 for ; Thu, 02 Jul 2020 20:32:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=HKrI4dJKbvS2Zs02hCoAOreYiDF6WXutUVQY7w6Sug8=; b=W1m9caZiHMlzdfuC0OJSkqCvPiBMLKBTPkMBKUZdOkTSwUAMzcgNEZKgW1Rn9mNH4h +uo7lgPQDHrpxBNqC5wnv/A92dCP8bOq4BX8BB/ULboTx4ORD/cGKx4RVt2g91wWMcCL ePEdPU1E3hINe6ohxBNFhIuv7OvpYEIxwVtZc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=HKrI4dJKbvS2Zs02hCoAOreYiDF6WXutUVQY7w6Sug8=; b=QiIDc55TsppIcvbAk3V+bFiiT05C3TtrypoAY3VjATfzSDRHPExfGy/coTNF7rZ7rw gftu2fg2mfEZkYba8EbUU+YMmmm8qZgXq8h/yOaWphdqIe697PwC8aPiINPYML3VteCi 0MXgc+4nlnCSkBWKpKgQZy1Jw8d4QDPllu7FyE0g0tVyfvy3aeYkA8bXBpJha/Z86bYT 6C+LR2DztalvYcbVgUstF8HkKIjxzcO2PT6yRq2pLFNQX48eXUeoBNSUDmZZrP7CCdCJ O8FF4uB/JOgLovgJiSmh9LP83aId2AX3R7n1ic7zq+kNKy6C6dJ8zvb0tDgg2etWUlph /p5g== X-Gm-Message-State: AOAM533pnixCJ5DQQYoQsQW9wcaaYdn/z4K0LmON6K/JKs9LnXsvF0VS h7DDprskXM+ShKZe457eJ4EOpcNTbLA= X-Google-Smtp-Source: ABdhPJwjwltvG3iwqjkPxnUAr/HgLPtjL08ZbvBbBBQBqm5bEucQE5m3xZaJOjRDq5wCVNWpS48D+g== X-Received: by 2002:ac2:5226:: with SMTP id i6mr20615126lfl.55.1593747159496; Thu, 02 Jul 2020 20:32:39 -0700 (PDT) Received: from mail-lj1-f180.google.com (mail-lj1-f180.google.com. [209.85.208.180]) by smtp.gmail.com with ESMTPSA id k6sm4135349lfm.89.2020.07.02.20.32.37 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Jul 2020 20:32:38 -0700 (PDT) Received: by mail-lj1-f180.google.com with SMTP id f5so19207008ljj.10 for ; Thu, 02 Jul 2020 20:32:37 -0700 (PDT) X-Received: by 2002:a2e:86c4:: with SMTP id n4mr3550221ljj.312.1593747157671; Thu, 02 Jul 2020 20:32:37 -0700 (PDT) MIME-Version: 1.0 References: <20200701184131.GI2786714@ZenIV.linux.org.uk> <20200701195914.GK2786714@ZenIV.linux.org.uk> <87lfk26nx4.fsf@mpe.ellerman.id.au> <20200702201755.GO2786714@ZenIV.linux.org.uk> <20200702205902.GP2786714@ZenIV.linux.org.uk> <20200703013328.GQ2786714@ZenIV.linux.org.uk> In-Reply-To: <20200703013328.GQ2786714@ZenIV.linux.org.uk> From: Linus Torvalds Date: Thu, 2 Jul 2020 20:32:21 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: objtool clac/stac handling change.. To: Al Viro Cc: Michael Ellerman , Christophe Leroy , Josh Poimboeuf , Peter Zijlstra , "the arch/x86 maintainers" , Linux Kernel Mailing List 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 On Thu, Jul 2, 2020 at 6:33 PM Al Viro wrote: > > What about load_unaligned_zeropad()? What about it? It doesn't care. It's for kernel addresses, clearing AC on exception does nothing. There's no user_access_begin/end anywhere around that thing that I can see. Linus