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

From: John Garry
Date: Tue Oct 15 2019 - 04:16:36 EST

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 - 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,