Re: [PATCH 2/4] base/drivers/arch_topology: Replace mutex with READ_ONCE / WRITE_ONCE

[Daniel Lezcano]

On 23/11/2018 14:58, Sudeep Holla wrote:
> On Mon, Oct 29, 2018 at 05:23:18PM +0100, Daniel Lezcano wrote:
>> The mutex protects a per_cpu variable access. The potential race can
>> happen only when the cpufreq governor module is loaded and at the same
>> time the cpu capacity is changed in the sysfs.
>>
> 
> I wonder if we really need that sysfs entry to be writable. For some
> reason, I had assumed it's read only, obviously it's not. I prefer to
> make it RO if there's no strong reason other than debug purposes.

Are you suggesting to remove the READ_ONCE/WRITE_ONCE patch and set the
sysfs file read-only ?


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