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

[Paul E. McKenney]

On Mon, Dec 07, 2020 at 10:46:33PM +0100, Thomas Gleixner wrote:
> On Mon, Dec 07 2020 at 11:44, Paul E. McKenney wrote:
> > On Mon, Dec 07, 2020 at 07:19:51PM +0100, Marco Elver wrote:
> >> On Mon, 7 Dec 2020 at 18:46, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> >> I currently don't know what the rule for Peter's preferred variant
> >> would be, without running the risk of some accidentally data_race()'d
> >> accesses.
> >> 
> >> Thoughts?
> >
> > I am also concerned about inadvertently covering code with data_race().
> >
> > 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()?
> 
> That was your suggestion a week or so ago :)

You expected my suggestion to change?  ;-)

							Thanx, Paul