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Date: Fri, 28 Oct 2016 22:00:30 -0400 (EDT)
From: Nicolas Pitre <nicolas.pitre@linaro.org>
To: Paul Bolle <pebolle@tiscali.nl>
cc: John Stultz <john.stultz@linaro.org>,
        Richard Cochran <richardcochran@gmail.com>,
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        Edward Cree <ecree@solarflare.com>, netdev@vger.kernel.org,
        linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 0/5] make POSIX timers optional with some Kconfig
 help
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On Sat, 29 Oct 2016, Paul Bolle wrote:

> On Tue, 2016-10-25 at 22:28 -0400, Nicolas Pitre wrote:
> > When POSIX timers are configured out, the PTP clock subsystem should be
> > left out as well. However a bunch of ethernet drivers currently *select*
> > the later in their Kconfig entries. Therefore some more work was needed
> > to break that hard dependency from those drivers without preventing their
> > usage altogether.
> 
> By the way: would you have pointers to threads that discussed attempts
> to achieve this using currently available Kconfig options?

You could probably go backward from here:
https://lkml.org/lkml/2016/9/20/606


Nicolas