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Subject[RFC 2/2] drivers: perf: arm_pmu: Drop 'pmu_lock' element from 'struct pmu_hw_events'
Date
As 'pmu_lock' element is not being used in any ARM PMU implementation, just
drop this from 'struct pmu_hw_events'.

Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
drivers/perf/arm_pmu.c | 1 -
include/linux/perf/arm_pmu.h | 6 ------
2 files changed, 7 deletions(-)

diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index d712a19e47ac..379479b50bdd 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -893,7 +893,6 @@ struct arm_pmu *armpmu_alloc(void)
struct pmu_hw_events *events;

events = per_cpu_ptr(pmu->hw_events, cpu);
- raw_spin_lock_init(&events->pmu_lock);
events->percpu_pmu = pmu;
}

diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
index 143fbc10ecfe..e2503d48ddee 100644
--- a/include/linux/perf/arm_pmu.h
+++ b/include/linux/perf/arm_pmu.h
@@ -59,12 +59,6 @@ struct pmu_hw_events {
*/
DECLARE_BITMAP(used_mask, ARMPMU_MAX_HWEVENTS);

- /*
- * Hardware lock to serialize accesses to PMU registers. Needed for the
- * read/modify/write sequences.
- */
- raw_spinlock_t pmu_lock;
-
/*
* When using percpu IRQs, we need a percpu dev_id. Place it here as we
* already have to allocate this struct per cpu.
--
2.25.1
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