linux-kernel - Re: [PATCH v4 2/2] s390/vfio-ap: control access to PQAP(AQIC) interception handler

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Message-ID: <20210525132628.GX1002214@nvidia.com>
Date:   Tue, 25 May 2021 10:26:28 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     "Jason J. Herne" <jjherne@...ux.ibm.com>
Cc:     Tony Krowiak <akrowiak@...ux.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, borntraeger@...ibm.com,
        cohuck@...hat.com, pasic@...ux.vnet.ibm.com,
        alex.williamson@...hat.com, kwankhede@...dia.com,
        frankja@...ux.ibm.com, david@...hat.com, imbrenda@...ux.ibm.com,
        hca@...ux.ibm.com
Subject: Re: [PATCH v4 2/2] s390/vfio-ap: control access to PQAP(AQIC)
 interception handler

On Tue, May 25, 2021 at 09:24:59AM -0400, Jason J. Herne wrote:
> change the function pointer to point to vfio_ap_ops:handle_pqap(). When we
> unload the module we change the function pointer back to the stub.  The
> updates should be atomic operations so no lock needed, right?

No

Jason