Re: [PATCH V5] powercap/drivers/idle_injection: Add an idle injection framework

[Peter Zijlstra]

On Tue, Jun 05, 2018 at 11:16:40AM +0200, Daniel Lezcano wrote:
> +	atomic_t idle_duration_ms;
> +	atomic_t run_duration_ms;

> +	idle_duration_ms = atomic_read(&ii_dev->idle_duration_ms);

> +	run_duration_ms = atomic_read(&ii_dev->run_duration_ms);

> +	atomic_set(&ii_dev->run_duration_ms, run_duration_ms);
> +	atomic_set(&ii_dev->idle_duration_ms, idle_duration_ms);

> +	*run_duration_ms = atomic_read(&ii_dev->run_duration_ms);
> +	*idle_duration_ms = atomic_read(&ii_dev->idle_duration_ms);

> +	if (!atomic_read(&ii_dev->idle_duration_ms))

> +	if (!atomic_read(&ii_dev->run_duration_ms))

What is the point of atomic_t here ?!