Re: [PATCH 3/4] ptp: add ioctl interface for ptp_gettimex64any()

[Richard Cochran]

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