Re: [patch V2 18/25] timekeeping: Prepare for cross timestamps on arbitrary clock IDs

[David Woodhouse]

On Fri, 2026-05-29 at 22:01 +0200, Thomas Gleixner wrote:
> From: Thomas Gleixner <tglx@xxxxxxxxxx>
> 
> PTP device system crosstime stamps support only CLOCK_REALTIME, which is
> meaningless for AUX clocks. The PTP core hands in the clock ID already, so
> prepare the core code to honor it.
> 
>  - Add a new sys_systime field to struct system_device_crosststamp which
>    aliases the sys_realtime field. Once all users are converted
>    sys_realtime can be removed.
> 
>  - Prepare get_device_system_crosststamp() and the related code for it by
>    switching to sys_systime and providing the initial changes to utilize
>    different time keepers.
> 
> No functional change intended.

We ended up with ktime_get_snapshot_id() also supporting CLOCK_BOOTTIME
and CLOCK_MONOTONIC_RAW, but not get_device_system_crosststamp().
Should we make that consistent?

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