linux-kernel - Re: [patch V2 04/26] timekeeping: Introduce timekeeper ID

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Message-ID: <CANDhNCoqYhFNfuyArrt0Sj7sWoLNsVJUn7YCUuxEL8nFrZPHog@mail.gmail.com>
Date: Thu, 12 Jun 2025 17:03:30 -0700
From: John Stultz <jstultz@...gle.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org, 
	Richard Cochran <richardcochran@...il.com>, Christopher Hall <christopher.s.hall@...el.com>, 
	Frederic Weisbecker <frederic@...nel.org>, Anna-Maria Behnsen <anna-maria@...utronix.de>, 
	Miroslav Lichvar <mlichvar@...hat.com>, Werner Abt <werner.abt@...nberg-usa.com>, 
	David Woodhouse <dwmw2@...radead.org>, Stephen Boyd <sboyd@...nel.org>, 
	Thomas Weißschuh <thomas.weissschuh@...utronix.de>, 
	Kurt Kanzenbach <kurt@...utronix.de>, Nam Cao <namcao@...utronix.de>, 
	Antoine Tenart <atenart@...nel.org>
Subject: Re: [patch V2 04/26] timekeeping: Introduce timekeeper ID

On Mon, May 19, 2025 at 1:33 AM Thomas Gleixner <tglx@...utronix.de> wrote:
>
> From: Anna-Maria Behnsen <anna-maria@...utronix.de>
>
> As long as there is only a single timekeeper, there is no need to clarify
> which timekeeper is used. But with the upcoming reusage of the timekeeper
> infrastructure for auxiliary clock timekeepers, an ID is required to
> differentiate.
>
> Introduce an enum for timekeeper IDs, introduce a field in struct tk_data
> to store this timekeeper id and add also initialization. The id struct
> field is added at the end of the second cachline, as there is a 4 byte hole
> anyway.
>
> Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
>

Acked-by: John Stultz <jstultz@...gle.com>

thanks
-john