Commit 5c591304 authored by Robin Murphy's avatar Robin Murphy Committed by Will Deacon

perf/arm-cci: Remove unnecessary period adjustment

Since sampling events are rejected up-front by cci_pmu_event_init(), it
doesn't make much sense to go fiddling with the sampling period later.
This would seem to be just another leftover artefact of the arm_pmu
framwork, and as such can go.
Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
Signed-off-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent d0f2e423
......@@ -1304,15 +1304,6 @@ static int __hw_perf_event_init(struct perf_event *event)
*/
hwc->config_base |= (unsigned long)mapping;
/*
* Limit the sample_period to half of the counter width. That way, the
* new counter value is far less likely to overtake the previous one
* unless you have some serious IRQ latency issues.
*/
hwc->sample_period = CCI_PMU_CNTR_MASK >> 1;
hwc->last_period = hwc->sample_period;
local64_set(&hwc->period_left, hwc->sample_period);
if (event->group_leader != event) {
if (validate_group(event) != 0)
return -EINVAL;
......
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