netdev - Re: [PATCH 3/4] ptp: add ioctl interface for ptp

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Message-ID: <ZRiSQ/fCa3pYZnXJ@hoboy.vegasvil.org>
Date: Sat, 30 Sep 2023 14:25:23 -0700
From: Richard Cochran <richardcochran@...il.com>
To: Mahesh Bandewar <maheshb@...gle.com>
Cc: Netdev <netdev@...r.kernel.org>, Linux <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Jonathan Corbet <corbet@....net>, Don Hatchett <hatch@...gle.com>,
	Yuliang Li <yuliangli@...gle.com>,
	Mahesh Bandewar <mahesh@...dewar.net>,
	Rahul Rameshbabu <rrameshbabu@...dia.com>
Subject: Re: [PATCH 3/4] ptp: add ioctl interface for ptp_gettimex64any()

On Thu, Sep 28, 2023 at 07:37:43PM -0700, Mahesh Bandewar wrote:
> add an ioctl op PTP_SYS_OFFSET_ANY2 to support ptp_gettimex64any() method

This is a useful idea.

But how about a new system call instead?

    clock_compare(clockid_t a, clockid_t b);

It would accept any two clock IDs.

I've been wanting this for a long time, but never found time to
implement it.

Thanks,
Richard