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

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Message-ID: <635a839b-bc1e-37ab-bd47-a554acc9b282@huawei.com>
Date:   Tue, 15 Oct 2019 09:16:13 +0100
From:   John Garry <john.garry@...wei.com>
To:     Sasha Levin <sashal@...nel.org>
CC:     <stable@...r.kernel.org>, <catalin.marinas@....com>,
        <will@...nel.org>, <rjw@...ysocki.net>, <lenb@...nel.org>,
        <sudeep.holla@....com>, <rrichter@...vell.com>,
        <jeremy.linton@....com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-acpi@...r.kernel.org>,
        <linuxarm@...wei.com>, <gregkh@...uxfoundation.org>,
        <guohanjun@...wei.com>, <wanghuiqiang@...wei.com>
Subject: Re: [PATCH for-stable-5.3 1/2] ACPI/PPTT: Add support for ACPI 6.3
 thread flag

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@....com>
>>
>> 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@....com>
>> Reviewed-by: Sudeep Holla <sudeep.holla@....com>
>> Reviewed-by: Robert Richter <rrichter@...vell.com>
>> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>> Signed-off-by: Will Deacon <will@...nel.org>
>> Signed-off-by: John Garry <john.garry@...wei.com>
>
> 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@huawei.com/. 
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