Re: [PATCH for-stable-5.3 1/2] ACPI/PPTT: Add support for ACPI 6.3 thread flag

[John Garry]

On 15/10/2019 00:29, Sasha Levin wrote:
> On Mon, Oct 14, 2019 at 07:56:01PM +0800, John Garry wrote:
> > From: Jeremy Linton <jeremy.linton@xxxxxxx>
> >
> > Commit bbd1b70639f785a970d998f35155c713f975e3ac upstream.
> >
> > ACPI 6.3 adds a flag to the CPU node to indicate whether
> > the given PE is a thread. Add a function to return that
> > information for a given linux logical CPU.
> >
> > Signed-off-by: Jeremy Linton <jeremy.linton@xxxxxxx>
> > Reviewed-by: Sudeep Holla <sudeep.holla@xxxxxxx>
> > Reviewed-by: Robert Richter <rrichter@xxxxxxxxxxx>
> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> > Signed-off-by: Will Deacon <will@xxxxxxxxxx>
> > Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
>
> How far back should these patches be backported?

Hi Sasha,

This patchset is for 5.3, and I sent a separate patchset for 4.19, since 
the backport is a little different and required some hand modification - 

https://lore.kernel.org/linux-arm-kernel/1571046986-231263-1-git-send-email-john.garry@xxxxxxxxxx/. 
4.19 is as far back as we want.

Please note that the patches in this 5.3 series are relevant for 5.2 
also, but since 5.2 is EOL, I didn't mention it. We did test 5.2, so you 
can add there also.

Please let me know if any more questions.

All the best,
John