Re: [patch 3/3] tick: Annotate tick_do_timer_cpu data races

[Peter Zijlstra]

On Mon, Dec 07, 2020 at 11:44:06AM -0800, Paul E. McKenney wrote:

> Also, in this particular case, why data_race() rather than READ_ONCE()?
> Do we really expect the compiler to be able to optimize this case
> significantly without READ_ONCE()?

It's about intent and how the code reads. READ_ONCE() is something
completely different from data_race(). data_race() is correct here.