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Date: Wed, 7 Jul 2021 12:01:38 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Lukasz Luba <lukasz.luba@....com>
Cc: linux-kernel@...r.kernel.org, Chris.Redpath@....com,
dietmar.eggemann@....com, morten.rasmussen@....com,
qperret@...gle.com, linux-pm@...r.kernel.org, rjw@...ysocki.net,
viresh.kumar@...aro.org, vincent.guittot@...aro.org,
mingo@...hat.com, juri.lelli@...hat.com, rostedt@...dmis.org,
segall@...gle.com, mgorman@...e.de, bristot@...hat.com,
CCj.Yeh@...iatek.com
Subject: Re: [PATCH 2/3] PM: EM: Make em_cpu_energy() able to return bigger
values
On Wed, Jul 07, 2021 at 09:09:08AM +0100, Lukasz Luba wrote:
> For now we would live with this simple code which improves
> all recent 64bit platforms and is easy to take it into Android
> common kernel. The next step would be more scattered across
> other subsystems, so harder to backport to Android 5.4 and others.
Ah, you *do* only care about 64bit :-) So one option is to only increase
precision for 64BIT builds, just like we do for scale_load() and
friends.
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