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=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 A1DB8C43465 for ; Sun, 20 Sep 2020 19:23:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2EC4620829 for ; Sun, 20 Sep 2020 19:23:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="TU8gswju" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726148AbgITTXG (ORCPT ); Sun, 20 Sep 2020 15:23:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726126AbgITTXG (ORCPT ); Sun, 20 Sep 2020 15:23:06 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4DFEC061755; Sun, 20 Sep 2020 12:23:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=M9C+xMteCLmxjuhFVA61FIZoHdpfMD5Lc3Ug+y14apc=; b=TU8gswjuXpvm/MyBSJB1vaOTwg 7CcQFeWPYOwW6PYXhvCpp0vzvWldb70TKuwk6v9nWcowTGn2VYxRj0sbzAeS1dOPc7tVJZV69Nc6Y Oye5Ac32YDMVeUtWbcgDk6Lqhz34cgGhYuiR2uTx7CyOyrh4ejW/zOiv0nLMgTDXz/4QksW+LarsO UKo48ovg6z43+egEg49LBUL7Qb1BK2+QYQXYWWRv+ZaoBr++1zvkvXaDBQNH/ENPEz9dpyIhUnPg/ RMo/EthNeTct23dRta9OEBgDELlkG8IIvv6XkLyXzRfFWLEelnomJhQf946LaXKaS04BIvNdWa7Hj bCj2UmxA==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kK4vL-0001qh-MM; Sun, 20 Sep 2020 19:22:59 +0000 Date: Sun, 20 Sep 2020 20:22:59 +0100 From: Matthew Wilcox To: Al Viro Cc: Christoph Hellwig , Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org Subject: Re: [PATCH 1/9] kernel: add a PF_FORCE_COMPAT flag Message-ID: <20200920192259.GU32101@casper.infradead.org> References: <20200918124533.3487701-1-hch@lst.de> <20200918124533.3487701-2-hch@lst.de> <20200920151510.GS32101@casper.infradead.org> <20200920180742.GN3421308@ZenIV.linux.org.uk> <20200920190159.GT32101@casper.infradead.org> <20200920191031.GQ3421308@ZenIV.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200920191031.GQ3421308@ZenIV.linux.org.uk> Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On Sun, Sep 20, 2020 at 08:10:31PM +0100, Al Viro wrote: > IMO it's much saner to mark those and refuse to touch them from io_uring... Simpler solution is to remove io_uring from the 32-bit syscall list. If you're a 32-bit process, you don't get to use io_uring. Would any real users actually care about that?