netdev - Re: [PATCHv3 net-next 2/3] ptp: add ioctl interface for ptp

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Message-ID: <ZZsSqXLjVG16Q7EL@hoboy.vegasvil.org>
Date: Sun, 7 Jan 2024 13:07:53 -0800
From: Richard Cochran <richardcochran@...il.com>
To: Mahesh Bandewar (महेश बंडेवार) <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>, John Stultz <jstultz@...gle.com>,
	Don Hatchett <hatch@...gle.com>, Yuliang Li <yuliangli@...gle.com>,
	Mahesh Bandewar <mahesh@...dewar.net>,
	Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCHv3 net-next 2/3] ptp: add ioctl interface for
 ptp_gettimex64any()

On Sat, Jan 06, 2024 at 12:08:57AM -0800, Mahesh Bandewar (महेश बंडेवार) wrote:

> Having a general solution for posix timers is a nice addition.
> However, expecting a general purpose syscall to eliminate need for
> device ioctl is an unreasonable expectation.

Let me make this clear:

There is no reasonable justification for a new PTP ioctl.

The system call can and should use the the most accurate method
internally to the kernel.

Thanks,
Richard