On Mon, Dec 07, 2020 at 11:46:48PM +0100, Thomas Gleixner wrote:
> On Mon, Dec 07 2020 at 14:38, Paul E. McKenney wrote:
>
> > 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 <t...@linutronix.de> 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? ;-)
>
> Your suggestion was data_race() IIRC but I might have lost track in that
> conversation.
OK, I am inconsistent after all. I would have suggested READ_ONCE() given
no difference between them, so it is probably best to assume that there is
(or at least was) a good reason for data_race() instead of READ_ONCE().
Couldn't tell you what it might be, though. :-/
Thanx, Paul
