Re: [Xen-devel] [PATCH hmm 08/15] xen/gntdev: Use select for DMA_SHARED_BUFFER

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

On 10/21/19 10:12 PM, Jason Gunthorpe wrote:
> On Wed, Oct 16, 2019 at 06:35:15AM +0000, Oleksandr Andrushchenko wrote:
> > On 10/16/19 8:11 AM, Jürgen Groß wrote:
> > > On 15.10.19 20:12, Jason Gunthorpe wrote:
> > > > From: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
> > > >
> > > > DMA_SHARED_BUFFER can not be enabled by the user (it represents a
> > > > library
> > > > set in the kernel). The kconfig convention is to use select for such
> > > > symbols so they are turned on implicitly when the user enables a kconfig
> > > > that needs them.
> > > >
> > > > Otherwise the XEN_GNTDEV_DMABUF kconfig is overly difficult to enable.
> > > >
> > > > Fixes: 932d6562179e ("xen/gntdev: Add initial support for dma-buf UAPI")
> > > > Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
> > > > Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> > > > Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
> > > > Cc: Juergen Gross <jgross@xxxxxxxx>
> > > > Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> > > > Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
> > > Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
> > Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
> Thanks Oleksandr and Juergen, can you also give me some advice on how
> to progress the more complex patch:
>
> https://patchwork.kernel.org/patch/11191369/
>
> Is this gntdev stuff still in-use? I struggled a bit to understand
> what it is doing, but I think I made a reasonable guess?
I think Jurgen and Boris could help here
> Jason
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