From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-fsdevel-owner@vger.kernel.org>
Received: from zeniv.linux.org.uk ([195.92.253.2]:44328 "EHLO
        ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1732278AbeGKBR4 (ORCPT
        <rfc822;linux-fsdevel@vger.kernel.org>);
        Tue, 10 Jul 2018 21:17:56 -0400
Date: Wed, 11 Jul 2018 02:16:11 +0100
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Jann Horn <jannh@google.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
        David Howells <dhowells@redhat.com>,
        Linux API <linux-api@vger.kernel.org>,
        linux-fsdevel@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 24/32] vfs: syscall: Add fsopen() to prepare for
 superblock creation [ver #9]
Message-ID: <20180711011610.GM30522@ZenIV.linux.org.uk>
References: <153126248868.14533.9751473662727327569.stgit@warthog.procyon.org.uk>
 <153126264966.14533.3388004240803696769.stgit@warthog.procyon.org.uk>
 <686E805C-81F3-43D0-A096-50C644C57EE3@amacapital.net>
 <CAG48ez2-p=jGZwmb3soh87RM6qHGEi6ctbLOVZ99LG6aHXUX_g@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAG48ez2-p=jGZwmb3soh87RM6qHGEi6ctbLOVZ99LG6aHXUX_g@mail.gmail.com>
Sender: linux-fsdevel-owner@vger.kernel.org
List-ID: <linux-fsdevel.vger.kernel.org>

On Tue, Jul 10, 2018 at 06:14:10PM -0700, Jann Horn wrote:

> I also love ioctls, so I think you could also use an ioctl to do the
> commit? You can do anything (well, almost anything) that you can do in
> syscall context in ioctl context, too; and when you already have a
> file descriptor of a specific type that you want to perform an
> operation on, an ioctl works just fine.

Poe's Law in action...