Re: [PATCH 5/5] IB/hfi1: Fix improper uses of smp_mb__before_atomic()

[Dennis Dalessandro]

On 5/9/2019 5:12 PM, Andrea Parri wrote:
> On Tue, Apr 30, 2019 at 01:16:57AM +0200, Andrea Parri wrote:
> > Hi Mike,
> >
> > > > This barrier only applies to the read-modify-write operations; in
> > > > particular, it does not apply to the atomic_read() primitive.
> > > >
> > > > Replace the barrier with an smp_mb().
> > >
> > > This is one of a couple of barrier issues that we are currently looking into.
> > >
> > > See:
> > >
> > > [PATCH for-next 6/9] IB/rdmavt: Add new completion inline
> > >
> > > We will take a look at this one as well.
> >
> > Thank you for the reference and for looking into this,
>
> So, I'm planning to just drop this patch; or can I do something to help?
>
> Please let me know.

Mike was looking into this, and I've got a handful of patches from him 
to review. He's unavailable for a while but if it's not included in the 
patches I've got we'll get something out shortly. So yes I think we can 
hold off on this patch for now. Thanks.

-Denny