Re: [PATCH kcsan 6/9] tools/memory-model: Expand the cheatsheet.txt notion of relaxed

peterz
2020-09-02T12:47:46Z

On Wed, Sep 02, 2020 at 08:37:15PM +0800, Boqun Feng wrote:
> On Wed, Sep 02, 2020 at 12:14:12PM +0200, peterz@infradead.org wrote:

> > > To be accurate, atomic_set() doesn't return any value, so it cannot be
> > > ordered against DR and DW ;-)
> >
> > Surely DW is valid for any store.
> >
>
> IIUC, the DW colomn stands for whether the corresponding operation (in
> this case, it's atomic_set()) is ordered any write that depends on this
> operation. I don't think there is a write->write dependency, so DW for
> atomic_set() should not be Y, just as the DW for WRITE_ONCE().

Ah, just shows I can't read I suppose ;-) I thought we were talking of
the other side of the depency.