On Mon, Jun 30, 2014 at 04:50:39PM +0800, Yan, Zheng wrote:
> @@ -2362,6 +2363,58 @@ unlock:
>  	}
>  }
>  
> +void perf_sched_cb_disable(struct pmu *pmu)
> +{
> +	__get_cpu_var(perf_sched_cb_usages)--;
> +}
> +
> +void perf_sched_cb_enable(struct pmu *pmu)
> +{
> +	__get_cpu_var(perf_sched_cb_usages)++;
> +}

Those should not be called {dis,en}able, they don't as such do that.
Also we have: this_cpu_{inc,dec} for this.