netdev - Re: [PATCH net-next 7/7] net: create a netdev notifier for DSA to reject PTP on DSA master

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Message-ID: <20230403083019.120b72fd@kernel.org>
Date:   Mon, 3 Apr 2023 08:30:19 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Maxim Georgiev <glipus@...il.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>,
        Köry Maincent <kory.maincent@...tlin.com>,
        Maxime Chevallier <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH net-next 7/7] net: create a netdev notifier for DSA to
 reject PTP on DSA master

On Sun,  2 Apr 2023 15:37:55 +0300 Vladimir Oltean wrote:
> The established way for unrelated modules to react on a net device event
> is via netdevice notifiers. So we create a new notifier which gets
> called whenever there is an attempt to change hardware timestamping
> settings on a device.

Two core parts of the kernel are not "unrelated modules".
Notifiers make the code harder to maintain and reason about.

But what do I know, clearly the code is amazing since it 
has been applied in <22h on a weekend :|