Hi Vince,
On 15/06/14 07:03, Vince Weaver wrote:
>
> Transition to using the new generic PERF_PMU_CAP_NO_INTERRUPT method for
> failing a sampling event when no PMU interrupt is available.
>
> Signed-off-by: Vince Weaver <[email protected]>
> @@ -866,6 +856,15 @@ static int __init init_hw_perf_events(void)
> pr_info("enabled with %s PMU driver, %d counters available\n",
> metag_pmu->name, metag_pmu->max_events);
>
> + /*
> + * Early cores have "limited" counters - they have no overflow
> + * interrupts - and so are unable to do sampling without extra work
> + * and timer assistance.
> + */
> + if (metag_pmu->max_period == 0) {
> + metag_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
> + }
The braces could be dropped.
Otherwise looks good to me,
Acked-by: James Hogan <[email protected]>
Cheers
James
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