Re: [RFC PATCH 15/20] coresight: etm-perf: implementing 'setup_aux()' API

From: Alexander Shishkin
Date: Wed Sep 30 2015 - 07:53:00 EST


Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> writes:

> +static void *etm_setup_aux(int cpu, void **pages,
> + int nr_pages, bool overwrite)
> +{
> + struct coresight_device *csdev;
> +
> + if (cpu == -1)
> + cpu = smp_processor_id();
> +
> + csdev = per_cpu(csdev_sink, cpu);
> + if (!csdev)
> + return NULL;
> +
> + return sink_ops(csdev)->setup_aux(csdev, cpu, pages,
> + nr_pages, overwrite);

Is it guaranteed that this sink would always have .setup_aux()?

Regards,
--
Alex
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