netdev - Re: [PATCH AUTOSEL 5.6 30/62] net: Make PTP-specific drivers depend on PTP_1588

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Date:   Thu, 14 May 2020 23:40:36 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Sasha Levin <sashal@...nel.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "# 3.4.x" <stable@...r.kernel.org>,
        Clay McClure <clay@...mons.net>,
        Richard Cochran <richardcochran@...il.com>,
        Nicolas Pitre <nico@...xnic.net>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        "David S . Miller" <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH AUTOSEL 5.6 30/62] net: Make PTP-specific drivers depend
 on PTP_1588_CLOCK

On Thu, May 14, 2020 at 8:52 PM Sasha Levin <sashal@...nel.org> wrote:
>
> From: Clay McClure <clay@...mons.net>
>
> [ Upstream commit b6d49cab44b567b3e0a5544b3d61e516a7355fad ]
>
> 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."

I don't think this one should be backported unless 3a9dd3ecb207 ("kconfig:
make 'imply' obey the direct dependency") is already backported to v5.6
(which I don't think it should either).

       Arnd