drivers: perf: arm_pmu: Drop 'pmu_lock' element from 'struct pmu_hw_events'

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>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20231115092805.737822-3-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index d712a19..379479b 100644 (file)
--- 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 143fbc1..e2503d4 100644 (file)
--- 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.