From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=2a+0=RT=vger.kernel.org=linux-fsdevel-owner@kernel.org>
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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham
	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 78776C43381
	for <linux-fsdevel@archiver.kernel.org>; Sat, 16 Mar 2019 20:26:25 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
	by mail.kernel.org (Postfix) with ESMTP id 504F9218A1
	for <linux-fsdevel@archiver.kernel.org>; Sat, 16 Mar 2019 20:26:25 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1726606AbfCPU0Y (ORCPT
        <rfc822;linux-fsdevel@archiver.kernel.org>);
        Sat, 16 Mar 2019 16:26:24 -0400
Received: from zeniv.linux.org.uk ([195.92.253.2]:51450 "EHLO
        ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1726493AbfCPU0Y (ORCPT
        <rfc822;linux-fsdevel@vger.kernel.org>);
        Sat, 16 Mar 2019 16:26:24 -0400
Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92 #3 (Red Hat Linux))
        id 1h5Fst-0000ib-2D; Sat, 16 Mar 2019 20:26:23 +0000
Date:   Sat, 16 Mar 2019 20:26:23 +0000
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Dan Williams <dan.j.williams@intel.com>
Cc:     linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [RFC] what's the point of register_filesystem() in
 drivers/dax/super.c?
Message-ID: <20190316202622.GE2217@ZenIV.linux.org.uk>
References: <20190316162353.GD2217@ZenIV.linux.org.uk>
 <CAPcyv4jNdD6DcicoDkm9tYuWwVkY_Ri5FEotCPDmsE8=YAC6qA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAPcyv4jNdD6DcicoDkm9tYuWwVkY_Ri5FEotCPDmsE8=YAC6qA@mail.gmail.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Sender: linux-fsdevel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-fsdevel.vger.kernel.org>
X-Mailing-List: linux-fsdevel@vger.kernel.org

On Sat, Mar 16, 2019 at 01:10:26PM -0700, Dan Williams wrote:
> On Sat, Mar 16, 2019 at 9:24 AM Al Viro <viro@zeniv.linux.org.uk> wrote:
> >
> >         It's not user-mountable, kern_mount() doesn't care about
> > looking it up by name, so the only effect of having it registered
> > is having it visible in /proc/filesystems.
> >
> >         Do you need that for anything?  Because I would rather
> > avoid more of that voodoo...
> 
> It can die. It was mindless copy/paste from fs/blockdev.c and the
> "bdev" fs. The device-dax unit tests pass just fine with it removed.
> I'll send a formal patch with the following:

Acked-by: Al Viro <viro@zeniv.linux.org.uk>

Do you prefer it in your tree, or would you rather have it go through
vfs.git?