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=-3.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,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 5B016C49361 for ; Fri, 18 Jun 2021 23:59:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 397EE60232 for ; Fri, 18 Jun 2021 23:59:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235284AbhFSABh (ORCPT ); Fri, 18 Jun 2021 20:01:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32852 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232678AbhFSABh (ORCPT ); Fri, 18 Jun 2021 20:01:37 -0400 Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F273C06175F for ; Fri, 18 Jun 2021 16:59:26 -0700 (PDT) Received: by mail-pg1-x536.google.com with SMTP id m2so9143439pgk.7 for ; Fri, 18 Jun 2021 16:59:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:cc:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding; bh=A2BKP9Hz/hQDKmMHUFJKsMFGEzNNYGC+i0f+o2u+SM4=; b=ha1Gp7Ph3ralXBPLAVuLxiTDJcxpYVzGjhw4FaNU0IWnpHlF8jZKOQANYYg3wGrXhZ GK/M4HZNP/OEAWk4euHTRHZ03ukS5jwiML7ZbjPGMhWYt5P9bhmbWaErSzGQ2kZMiJMw 2zNbilUYhlOj36nz2qMhIgoOWWi6sEScdS8IwGOqZfTqHtO7a/CeV8t26SIjZF8j/qZX q/mTutXJkxjyhkMtkn28AuyjtjGoabC3gKZmjEZZXjk6Nz/AuvrU1cUA8uuvy+CkAa+a 4j7NrPO1RSrtc56MGHdEGnWsMc55bP73aAuew8pPjsT7YxWVEpeezBYYzrZTsY0XfK3n 598g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:cc:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=A2BKP9Hz/hQDKmMHUFJKsMFGEzNNYGC+i0f+o2u+SM4=; b=IkMlemNLYIEUr/IZBi6RbnFfo/DASrZwW4oINa3A3t1k1RFTqj0LhyWDNYx1W8jITq 8rAqSS3UXOj/fablZGqE1TXjkf/MZHD1O8EasqKRUJZrULX9qZvC1S4fz7ksUHDjr19l AEQQdgxY77zwX0NCmsh8u+Iye2NY29SMkdx5O5kjpYxt45w+mkibr6hJy1Mh7lx1eEbw gdPNsi+3Ok30A181iukTNjNYTDR37wzLrEdCic7z2M1GjtI7s6TvygpNu0CfRtfwKCJB 14fLwCXJw4pz8kQoEpIZurZB2FlKodKGhmESePTLMetz4+XihZcWEn/on5rtLbfU9LRF phCQ== X-Gm-Message-State: AOAM533uCmrIz2V/xkxOh6n8vC9KOLSnDJ6ZpMhed02dC0Y8WMCNlorx wf5kGJPIgP9Ptk61DJl9sEY= X-Google-Smtp-Source: ABdhPJx9O8hg3d+DFIxyppbV8i2nKUdbCvFAPjxcJdec13A6fcBM1uK0/3/WEXxj4co2uwlSsUpYTQ== X-Received: by 2002:a65:568c:: with SMTP id v12mr12548150pgs.88.1624060765925; Fri, 18 Jun 2021 16:59:25 -0700 (PDT) Received: from [10.1.1.25] (222-152-189-137-fibre.sparkbb.co.nz. [222.152.189.137]) by smtp.gmail.com with ESMTPSA id b6sm9049466pfv.16.2021.06.18.16.59.21 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 18 Jun 2021 16:59:25 -0700 (PDT) Subject: Re: [PATCH v2] m68k: save extra registers on more syscall entry points To: Linus Torvalds References: <1623979642-14983-1-git-send-email-schmitzmic@gmail.com> <91865b90-c597-6119-5e14-dfe521a33489@gmail.com> Cc: Geert Uytterhoeven , linux-arch , linux-m68k , "Eric W. Biederman" , Andreas Schwab From: Michael Schmitz Message-ID: Date: Sat, 19 Jun 2021 11:59:19 +1200 User-Agent: Mozilla/5.0 (X11; Linux ppc; rv:45.0) Gecko/20100101 Icedove/45.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org Hi Linus, Am 19.06.2021 um 11:38 schrieb Linus Torvalds: > On Fri, Jun 18, 2021 at 3:34 PM Michael Schmitz wrote: >> >> Is your patch to copy_thread() to add the extra stack frame still needed? > > So it's been a long time since I did any m68k assembly, but I think > the m68k patch for the PF_IO_WORKER thread case should look something > like the attached. OK, that answers my question, thanks! > > Note: my only m68k work was ever on the 68008, and used the Motorola > syntax, not the odd Sun assembler syntax, so my m68k asm skills really > aren't good. > > Put another way: I'd be surprised if the attached patch actually > works, but I think it's fairly close. I tried to add comments to > explain the code at least a bit. > > Hmm? I'll give it a spin (on the emulator). Cheers, Michael > > Linus >