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ARM: perf: remove active_mask

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Currently, pmu_hw_events::active_mask is used to keep track of which
events are active in hardware. As we can stop counters and their
interrupts, this is unnecessary.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Jamie Iles <jamie@jamieiles.com>
Reviewed-by: Ashwin Chaugule <ashwinc@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Rutland
2011-07-19 09:37:10 +01:00
committed by Will Deacon
parent 7b9f72c62e
commit c47f8684ba
4 changed files with 18 additions and 18 deletions
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8
arch/arm/kernel/perf_event.c
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@@ -57,12 +57,6 @@ struct cpu_hw_events {
* an event. A 0 means that the counter can be used.
*/
unsigned long used_mask[BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)];
/*
* A 1 bit for an index indicates that the counter is actively being
* used.
*/
unsigned long active_mask[BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)];
};
static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
@@ -295,7 +289,6 @@ armpmu_del(struct perf_event *event, int flags)
WARN_ON(idx < 0);
clear_bit(idx, cpuc->active_mask);
armpmu_stop(event, PERF_EF_UPDATE);
cpuc->events[idx] = NULL;
clear_bit(idx, cpuc->used_mask);
@@ -327,7 +320,6 @@ armpmu_add(struct perf_event *event, int flags)
event->hw.idx = idx;
armpmu->disable(hwc, idx);
cpuc->events[idx] = event;
set_bit(idx, cpuc->active_mask);
hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
if (flags & PERF_EF_START)