[PATCH v2] cpuidle/cpuidle-big_little: fix reading cpu id part number

Juri Lelli juri.lelli at arm.com
Fri Aug 15 09:36:05 PDT 2014

On 15/08/14 17:32, Kevin Hilman wrote:
> Juri Lelli <juri.lelli at 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 at 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.


- Juri

> Kevin

More information about the linux-arm-kernel mailing list