Re: [tip: timers/urgent] timekeeping: Use READ/WRITE_ONCE() for tick_do_timer_cpu

Thomas Gleixner
2024-04-10T14:54:36Z

On Wed, Apr 10 2024 at 10:15, Ingo Molnar wrote:
>> @@ -232,7 +233,7 @@ static void tick_setup_device(struct tick_device *td,
>> !tick_nohz_full_cpu(cpu)) {
>> tick_take_do_timer_from_boot();
>> tick_do_timer_boot_cpu = -1;
>> - WARN_ON(tick_do_timer_cpu != cpu);
>> + WARN_ON(READ_ON_ONCE(tick_do_timer_cpu) != cpu);
>
> So there's no such thing as READ_ON_ONCE() - I've amended the commit with
> the fix below.

Can you hand me a brown paper bag please?