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, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, TVD_SUBJ_WIPE_DEBT 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 2F125C433E9 for ; Thu, 3 Sep 2020 15:45:45 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D2C7020665 for ; Thu, 3 Sep 2020 15:45:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D2C7020665 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4Bj4s24mgJzDqLR for ; Fri, 4 Sep 2020 01:45:42 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=ftp.linux.org.uk (client-ip=2002:c35c:fd02::1; helo=zeniv.linux.org.uk; envelope-from=viro@ftp.linux.org.uk; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=zeniv.linux.org.uk Received: from ZenIV.linux.org.uk (zeniv.linux.org.uk [IPv6:2002:c35c:fd02::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Bj37p1DnczDr3m for ; Fri, 4 Sep 2020 00:28:21 +1000 (AEST) Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kDqDb-009r2h-BF; Thu, 03 Sep 2020 14:28:03 +0000 Date: Thu, 3 Sep 2020 15:28:03 +0100 From: Al Viro To: Christoph Hellwig Subject: Re: remove the last set_fs() in common code, and remove it for x86 and powerpc v3 Message-ID: <20200903142803.GM1236603@ZenIV.linux.org.uk> References: <20200903142242.925828-1-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200903142242.925828-1-hch@lst.de> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Kees Cook , x86@kernel.org, linux-kernel@vger.kernel.org, Luis Chamberlain , linux-fsdevel@vger.kernel.org, Linus Torvalds , Alexey Dobriyan Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, Sep 03, 2020 at 04:22:28PM +0200, Christoph Hellwig wrote: > Besides x86 and powerpc I plan to eventually convert all other > architectures, although this will be a slow process, starting with the > easier ones once the infrastructure is merged. The process to convert > architectures is roughtly: > > (1) ensure there is no set_fs(KERNEL_DS) left in arch specific code > (2) implement __get_kernel_nofault and __put_kernel_nofault > (3) remove the arch specific address limitation functionality The one to really watch out for is sparc; I have something in that direction, will resurrect as soon as I'm done with eventpoll analysis... I can live with this series; do you want that in vfs.git#for-next?