From: Nicolas Pitre <>
Date: Tue, 20 Sep 2016 15:56:38 -0400

> Many embedded systems don't need the full POSIX timer support.
> Configuring them out provides a nice kernel image size reduction.
> When POSIX timers are configured out, the PTP clock subsystem should be
> left out as well. However a bunch of ethernet drivers currently *select*
> it in their Kconfig entries. Therefore some more tweaks were needed to
> break that hard dependency for those drivers to still be configured in
> if desired.
> It was agreed that the best path upstream for those patches is via
> John Stultz's timer tree.

Acked-by: David S. Miller <>

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