linux-kernel - Re: [Bug 212265] New: clock_gettime(CLOCK_TAI, ...) should return an error when TAI has not been configured

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Message-ID: <20210329141809.GA20909@hoboy.vegasvil.org>
Date:   Mon, 29 Mar 2021 07:18:09 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Daphne Preston-Kendal <dpk@...ceword.org>
Cc:     Miroslav Lichvar <mlichvar@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>,
        "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
Subject: Re: [Bug 212265] New: clock_gettime(CLOCK_TAI, ...) should return an
 error when TAI has not been configured

On Mon, Mar 29, 2021 at 11:56:31AM +0200, Daphne Preston-Kendal wrote:
> > The other is that the kernel updates the offset when a leap
> > second is inserted/deleted even if the original offset is zero, so
> > checking for zero (in the kernel or an application) works only until
> > the first leap second after boot.
> 
> This is a problem and definitely speaks for having a way to tell whether CLOCK_TAI has been set up at all.

+1

Thanks,
Richard