linux-kernel - Re: [PATCH net-next 1/1] net: mdio: reset PHY before attempting to access ID register

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Message-ID: <54f2a7ff-640d-4a9d-bfc9-5190f295f466@lunn.ch>
Date: Thu, 27 Nov 2025 16:56:16 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Buday Csaba <buday.csaba@...lan.hu>
Cc: Jakub Kicinski <kuba@...nel.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 1/1] net: mdio: reset PHY before attempting to
 access ID register

> c) what about using EXPORT_SYMBOL_FOR_MODULES() on the problematic
>    functions? Are there any objections against it?
>    This type of export is rarely used in the kernel, so I am uncertain
>    about that. Is using it on functions declared in private headers
>    also discouraged?

Rather than _FOR_MODULES, how about using a namespace.

https://docs.kernel.org/core-api/symbol-namespaces.html#how-to-use-symbols-exported-in-namespaces

Add a name space "NET_PHY_CORE_ONLY", and put these symbols into that
name space. We should notice any driver importing that namespace and
reject it.

	Andrew