Received: by 2002:a25:4158:0:0:0:0:0 with SMTP id o85csp495926yba; Sat, 4 May 2019 06:49:25 -0700 (PDT) X-Google-Smtp-Source: APXvYqzQTaF/ot7ukQ1KePkH6gXd1MlouJG1ITzbGDkKaeNb91Fy94gVogu6kyqChd61/T5O/dJO X-Received: by 2002:a62:4115:: with SMTP id o21mr19406093pfa.153.1556977765018; Sat, 04 May 2019 06:49:25 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1556977765; cv=none; d=google.com; s=arc-20160816; b=JQ9iD6wQbc6o/jA2RSHZ8g7OWHqpBG1LIFZm+5FIU/j8nczwK51SKvnGile+oB8+1f Qy8AaZtffEH5nDEI77DDYwSmeg4bZNpK6Xj11qtegiT3i6L/N2W6ArbGGF/tY2IFyVw+ FtQUA+0bUwfpJ7YcgMG3jKxebVfEkjISDjGLYfF1ZsRv1CUSzUYXdXEsiIoDx9AwsaDb LpqICbSKi1MBfPrby/KqSdTS0SFBZz4jmjwu+4ejAfgNoh8Zai0KFMaPQyhAAq4p8n5N 3mulnqTlDwu6kp4bYcVYWPVtBCbOhxKXZa66+onOJz7DsYbagI31LH+wBnHulKlQ+cIG tpdQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=4gDCXfgTJSqU8RmWI0QY4FMBFtSttEc0rnua7bpTTkg=; b=qBoatyYHJ+YJNl+0Ab5Rl5AiksJZRc0PSiMvqQ7oKzeJBBO7zQ6mmlaKFFJMVNB914 evEfVEAPRVpez5RKTTixG5B91nR7UR5PvolLEbB+23VD93Z9hnOc5riFbEbu1zkPR4k6 4OAmkqSicPB8xehZ0eMtFjUza2Z2HTUYQHdKSI6m3XDQ4a+5LJ856fY5MkcCIivk9sM6 x1cwyRCLeedOlslF1BEZs4GomVMBKZemXRrC7WzEOiNwXbGgnzLTSa6GFbLAy84Vi1g3 jx0x82ameSgN1KDnpNdjbTIm5B1KPdRBHyekpZ4N2VS2iaqhIxlzZMV8ayzPI4OAY3fk b2Wg== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=tQJ7k8vQ; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id o20si2711714pgm.94.2019.05.04.06.49.09; Sat, 04 May 2019 06:49:25 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=tQJ7k8vQ; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726652AbfEDNpH (ORCPT + 99 others); Sat, 4 May 2019 09:45:07 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:41042 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726214AbfEDNpG (ORCPT ); Sat, 4 May 2019 09:45:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=4gDCXfgTJSqU8RmWI0QY4FMBFtSttEc0rnua7bpTTkg=; b=tQJ7k8vQHX8oaEuWuMTwZ78FE gjbjNmJPo8R4/B2TzzwD33A+ZjgMCywLP2thvtedAapodW2fIqKvMqhdSsfBBkFCxzfIlFC3I1c9u omDICDobhOjZxImAa5R/gpoCtDcUX6SAH9VOTouVd/YkoPmyAO8THRlIxTbZaAyhWqglFblOpsw+H bzCJlCh29xc5FVIN8FRRyUfAQLQ+VK2BXwyZZZ4AypktQ1PQ8K2Y1SF+rEDhDVeqHuiOc1iTpltoi hhr6HCCOXyRUC/dFsrGOkvTRAESap88FK9og8y/KrG6Wtar9duEa85z3DzBlv/gM9hwrhUv4XRC7/ M77GV0wkQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1hMuyO-00069C-1i; Sat, 04 May 2019 13:45:04 +0000 Date: Sat, 4 May 2019 06:45:03 -0700 From: Matthew Wilcox To: Carmeli Tamir Cc: viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] Use list.h instead of file_system_type next Message-ID: <20190504134503.GA16963@bombadil.infradead.org> References: <20190504094549.10021-1-carmeli.tamir@gmail.com> <20190504094549.10021-2-carmeli.tamir@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190504094549.10021-2-carmeli.tamir@gmail.com> User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, May 04, 2019 at 05:45:48AM -0400, Carmeli Tamir wrote: > Changed file_system_type next field to list_head and refactored > the code to use list.h functions. What might be interesting is getting rid of this list and using an XArray instead. This would be a more in-depth change; getting rid of the rwlock in favour of using RCU accesses for the read-side and the xa_lock for write accesses to the filesystem list.