From mboxrd@z Thu Jan  1 00:00:00 1970
From: Juri Lelli <juri.lelli@arm.com>
Subject: Re: [PATCH v2] cpuidle/cpuidle-big_little: fix reading cpu id part
 number
Date: Fri, 15 Aug 2014 17:36:05 +0100
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To: Kevin Hilman <khilman@linaro.org>
Cc: "linux@arm.linux.org.uk" <linux@arm.linux.org.uk>, Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>, Daniel Lezcano <daniel.lezcano@linaro.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, Will Deacon <Will.Deacon@arm.com>, Chao Xie <chao.xie@marvell.com>, Stephen Warren <swarren@nvidia.com>, Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, "rob.herring@calxeda.com" <rob.herring@calxeda.com>, Jonathan Austin <Jonathan.Austin@arm.com>, Chao Xie Linux <xiechao.mail@gmail.com>, Juri Lelli <juri.lelli@gmail.com>, "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>

On 15/08/14 17:32, Kevin Hilman wrote:
> Juri Lelli <juri.lelli@arm.com> writes:
> 
>> Commit af040ffc9ba1 ("ARM: make it easier to check the CPU part number
>> correctly") changed ARM_CPU_PART_X masks, and the way they are returned and
>> checked against. Usage of read_cpuid_part_number() is now deprecated, and
>> calling places updated accordingly. This actually broke cpuidle-big_little
>> initialization, as bl_idle_driver_init() performs a check using an hardcoded
>> mask on cpu_id.
>>
>> Create an interface to perform the check (that is now even easier to read).
>> Define also a proper mask (ARM_CPU_PART_MASK) that makes this kind of checks
>> cleaner and helps preventing bugs in the future. Update usage accordingly.
> 
> [...]
> 
> Tested-by: Kevin Hilman <khilman@linaro.org>
> 

Great, thanks!

> FWIW, I can confirm that this patch is needed for cpuidle-big_little to
> work on the Exynos5800/Chromebook2.
> 

Ok, the patch has been already sent to Russell's patch system.

Best,

- Juri

> Kevin
>