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Date:   Fri, 01 May 2020 15:28:37 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH v2] net: Make PTP-specific drivers depend on

From: Clay McClure <>
Date: Wed, 29 Apr 2020 00:59:00 -0700

> Commit d1cbfd771ce8 ("ptp_clock: Allow for it to be optional") changed
> all PTP-capable Ethernet drivers from `select PTP_1588_CLOCK` to `imply
> PTP_1588_CLOCK`, "in order to break the hard dependency between the PTP
> clock subsystem and ethernet drivers capable of being clock providers."
> As a result it is possible to build PTP-capable Ethernet drivers without
> the PTP subsystem by deselecting PTP_1588_CLOCK. Drivers are required to
> handle the missing dependency gracefully.
> Note how these symbols all reference PTP or timestamping in their name;
> this is a clue that they depend on PTP_1588_CLOCK.
> Change them from `imply PTP_1588_CLOCK` [2] to `depends on PTP_1588_CLOCK`.
> I'm not using `select PTP_1588_CLOCK` here because PTP_1588_CLOCK has
> its own dependencies, which `select` would not transitively apply.
> Additionally, remove the `select NET_PTP_CLASSIFY` from CPTS_TI_MOD;
> PTP_1588_CLOCK already selects that.

Applied, thanks.

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