linux-kernel - Re: [PATCH v3 3/5] net: Let the active time stamping layer be selectable.

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Date:   Fri, 17 Mar 2023 20:38:49 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     Köry Maincent <kory.maincent@...tlin.com>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        Michael Walle <michael@...le.cc>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-omap@...r.kernel.org,
        Maxime Chevallier <maxime.chevallier@...tlin.com>,
        thomas.petazzoni@...tlin.com, Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Jay Vosburgh <j.vosburgh@...il.com>,
        Veaceslav Falico <vfalico@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com, Minghao Chi <chi.minghao@....com.cn>,
        Jie Wang <wangjie125@...wei.com>,
        Oleksij Rempel <linux@...pel-privat.de>,
        Sean Anderson <sean.anderson@...o.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Alexander Lobakin <alexandr.lobakin@...el.com>,
        Marco Bonelli <marco@...eim.net>
Subject: Re: [PATCH v3 3/5] net: Let the active time stamping layer be
 selectable.

On Fri, Mar 17, 2023 at 05:21:50PM +0200, Vladimir Oltean wrote:
> On Thu, Mar 16, 2023 at 04:09:20PM +0100, Köry Maincent wrote:
> > Was there any useful work that could be continued on managing timestamp through
> > NDOs. As it seem we will made some change to the timestamp API, maybe it is a
> > good time to also take care of this.
> 
> Not to my knowledge. Yes, I agree that it would be a good time to add an
> NDO for hwtimestamping (while keeping the ioctl fallback), then
> transitioning as many devices as we can, and removing the fallback when
> the transition is complete.

Um, user space ABI cannot be removed.

Thanks,
Richard