linux-kernel - Re: [PATCH] s390/vfio-ap: do not open code locks for VFIO_GROUP_NOTIFY_SET

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Date:   Wed, 14 Jul 2021 13:02:08 -0600
From:   Alex Williamson <alex.williamson@...hat.com>
To:     Christian Borntraeger <borntraeger@...ibm.com>
Cc:     Tony Krowiak <akrowiak@...ux.ibm.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Halil Pasic <pasic@...ux.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, cohuck@...hat.com,
        pasic@...ux.vnet.ibm.com, jjherne@...ux.ibm.com,
        kwankhede@...dia.com, frankja@...ux.ibm.com, david@...hat.com,
        imbrenda@...ux.ibm.com, hca@...ux.ibm.com
Subject: Re: [PATCH] s390/vfio-ap: do not open code locks for
 VFIO_GROUP_NOTIFY_SET_KVM notification

On Wed, 14 Jul 2021 19:56:42 +0200
Christian Borntraeger <borntraeger@...ibm.com> wrote:

> On 14.07.21 15:25, Tony Krowiak wrote:
> >   
> >> This patch shows it works as a rwsem - look at what had to be changed
> >> to make it so and you will find some clue to where the problems are in
> >> kvm_busy version.
> >>
> >> In any event, I don't care anymore - please just get this merged, to
> >> AlexW's tree so I don't have conflicts with the rest of the ap changes
> >> for VFIO I've got queued up.  
> > 
> > Christian, can you merge this with AlexW's tree? Halil suggested
> > the 'fixes' and 'cc stable' tags ought to be removed, do I need
> > to post another version or can you take those out when merging?  
> 
> Normally this would go via the KVM/s390 or s390 tree (as Alex did
> not want to handle s390 vfio devices).
> 
> Alex, as Jason is waiting for this to be in your tree could you take
> this patch via your tree ?(please remove cc stable and Fixes for now
> I want this to settle a bit).
> 
> To carry this patch in your tree with my kvm/s390 and s390 maintainer hat
> Acked-by: Christian Borntraeger <borntraeger@...ibm.com>

Is this intended for v5.14 or v5.15?  I don't have a v5.15 next branch
yet, so if this were to get into v5.14 before I create that, it'd be
there for Jason as well.  Posting a branch that we both merge into our
linux-next branches would be another option.  I can take it either way,
just trying to understand what we're wanting to achieve.  Thanks,

Alex