[PATCH 1/2] cpufreq: exynos: use relaxed IO accesors

Krzysztof Kozlowski k.kozlowski at samsung.com
Wed Jun 22 03:36:18 PDT 2016

On Wed, Jun 22, 2016 at 11:53 AM, Arnd Bergmann <arnd at arndb.de> wrote:
> On Wednesday, June 22, 2016 10:33:03 AM CEST Ben Dooks wrote:
>> The use of __raw IO accesors is not endian safe and should be used
>> sparingly. The relaxed variants should be as lightweight and also
>> are endian safe.
>> Signed-off-by: Ben Dooks <ben.dooks at codethink.co.uk>
> Why not use the normal readl/writel() here instead of the relaxed version?
> Either one should work here, but in general I'd recommend using the
> non-relaxed version unless code is particularly performance sensitive.
> The main argument for that is to not let people get used to using
> _relaxed() all the time because it causes some very hard to debug
> problems in the cases where you actually need the barriers.

I think that would be actually different patch, not endian related.
The concurrent operations here are excluded by mutexes so this looks

I saw your ack. Do you prefer me to take the set through samsung-soc?

Best regards,

More information about the linux-arm-kernel mailing list