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Date:   Tue, 15 Jan 2019 07:31:28 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Joel Nider <joeln@...ibm.com>
Cc:     Jonathan Corbet <corbet@....net>, Jason Gunthorpe <jgg@...pe.ca>,
        Leon Romanovsky <leon@...nel.org>,
        Doug Ledford <dledford@...hat.com>,
        Mike Rapoport <rppt@...ux.ibm.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] docs-rst: userspace: update verbs API details

On Tue, Jan 15, 2019 at 12:26:31PM +0200, Joel Nider wrote:
> It is important to understand the existing framework when implementing
> a new verb. The majority of existing API functions are implemented using
> the write syscall, but this has been superceded by the ioctl syscall
> for new commands. This patch updates the documentation regarding how
> to go about implementing a new verb, focusing on the new ioctl
> interface.
> 
> The documentation is far from complete, but this is a good step in the
> right direction. Future patches can add more detail according to need.
> Also, the interface is still undergoing substantial changes so an
> effort was made to document only the stable parts so as to avoid
> incorrect information since documentation changes tend to lag behind
> code changes.

I think this is a horrible direction to take.  The current document is
clearly for _users_.  All this documentation you've added is for kernel
hackers.  It needs to go in a different file, or not be added at all.

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