Re: [RFC][PATCH 5/7] jump_label: Rework update logic

[Peter Zijlstra]

On Mon, Jul 27, 2015 at 12:47:14PM +0200, Peter Zijlstra wrote:
> @@ -68,13 +63,8 @@ void static_key_slow_inc(struct static_k
>  		return;
>  
>  	jump_label_lock();
> +	if (atomic_inc_and_test(&key->enabled))

atomic_inc_return() == 1, works _much_ better.

> +		jump_label_update(key);
>  	jump_label_unlock();
>  }
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