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From:   Pavel Tatashin <pasha.tatashin@oracle.com>
Date:   Mon, 30 Jul 2018 09:44:41 -0400
Message-ID: <CAGM2reZxGzjfs8pEBsZ3CHdVFOZu7fz5_XRifcqj6E87qZiA9g@mail.gmail.com>
Subject: Re: [tip:x86/timers] sched/clock: Enable sched clock early
To:     peterz@infradead.org
Cc:     Guenter Roeck <linux@roeck-us.net>,
        LKML <linux-kernel@vger.kernel.org>, mingo@kernel.org,
        tglx@linutronix.de, hpa@zytor.com,
        linux-tip-commits@vger.kernel.org
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> > -       if (cd.actual_read_sched_clock == jiffy_sched_clock_read)
> > +       if (cd.actual_read_sched_clock == jiffy_sched_clock_read) {
> > +               local_irq_disable();
> >                 sched_clock_register(jiffy_sched_clock_read, BITS_PER_LONG, HZ);
> > +               local_irq_enable();
> > +       }
> >
> >         update_sched_clock();
>
> I'm thinking maybe disable IRQs for that entire function, instead of
> just the register call.

Sure, I will send a patch.

Thank you,
Pavel