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authorMark Rutland <mark.rutland@arm.com>2011-07-19 09:37:10 +0100
committerWill Deacon <will.deacon@arm.com>2011-08-31 10:50:02 +0100
commitc47f8684baefa2bf52c4320f894e73db08dc8a0a (patch)
tree685df6d09e03620e12d50c31cbf20e69b9e6ee32 /arch/arm/kernel/perf_event.c
parent7b9f72c62ed047a200b1ef8c70bee0b58e880af8 (diff)
downloadlinux-c47f8684baefa2bf52c4320f894e73db08dc8a0a.tar.gz
ARM: perf: remove active_mask
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>
Diffstat (limited to 'arch/arm/kernel/perf_event.c')
-rw-r--r--arch/arm/kernel/perf_event.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index dfde9283aec1..438482ff7498 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -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)