Re: [PATCH v2] introduce atomic_pointer to fix a race condition in cancelable mcs spinlocks

Davidlohr Bueso
2014-06-02T17:12:36Z

On Mon, 2014-06-02 at 10:09 -0700, Linus Torvalds wrote:
> On Mon, Jun 2, 2014 at 9:25 AM, Peter Zijlstra <peterz@infradead.org> wrote:
> >
> > And I can't say I'm a particular fan of these ops either, as alternative
> > I'm almost inclined to just exclude parisc from using opt spinning.
>
> Please do.

I agree, this is the best way out of this mess. Furthermore, it would
also be nice to consolidate opt spinning in a common CONFIG option --
right now mutexes and rwsems create their own dependencies.