Re: [PATCH 04/16] libnvdimm: Move nd_numa_attribute_group to device_type

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On Tue, Nov 12, 2019 at 1:23 AM Aneesh Kumar K.V
<aneesh.kumar@xxxxxxxxxxxxx> wrote:
>
> Dan Williams <dan.j.williams@xxxxxxxxx> writes:
>
> > A 'struct device_type' instance can carry default attributes for the
> > device. Use this facility to remove the export of
> > nd_numa_attribute_group and put the responsibility on the core rather
> > than leaf implementations to define this attribute.
> >
> > Cc: Ira Weiny <ira.weiny@xxxxxxxxx>
> > Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
> > Cc: "Oliver O'Halloran" <oohall@xxxxxxxxx>
> > Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx>
> > Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
> > Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
>
>
> can we also expose target_node in a similar way? This allows application
> to better understand the node locality of the SCM device.

It is already exported for device-dax instances. See
DEVICE_ATTR_RO(target_node) in drivers/dax/bus.c. I did not see a use
case for it to be exported for other nvdimm device types.




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