[PATCH v3 hmm 10/12] mm/hmm: Do not use list*_rcu() for hmm->ranges

[Jason Gunthorpe]

On Sat, Jun 15, 2019 at 07:18:26AM -0700, Christoph Hellwig wrote:
> On Thu, Jun 13, 2019 at 09:44:48PM -0300, Jason Gunthorpe wrote:
> >  	range->hmm = hmm;
> >  	kref_get(&hmm->kref);
> > -	list_add_rcu(&range->list, &hmm->ranges);
> > +	list_add(&range->list, &hmm->ranges);
> >  
> >  	/*
> >  	 * If there are any concurrent notifiers we have to wait for them for
> > @@ -934,7 +934,7 @@ void hmm_range_unregister(struct hmm_range *range)
> >  	struct hmm *hmm = range->hmm;
> >  
> >  	mutex_lock(&hmm->lock);
> > -	list_del_rcu(&range->list);
> > +	list_del(&range->list);
> >  	mutex_unlock(&hmm->lock);
> 
> Looks fine:
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> 
> Btw, is there any reason new ranges are added to the front and not the
> tail of the list?

Couldn't find one. I think order on this list doesn't matter.

Jason