ARM: pmu: remove unused reservation mechanism

The PMU reservation mechanism was originally intended to allow OProfile
and perf-events to co-ordinate over access to the CPU PMU. Since then,
OProfile for ARM has moved to using perf as its backend, so the
reservation code is no longer used.

This patch removes the reservation code for the CPU PMU on ARM.

Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 0 insertions, 8 deletions

diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 3aa338849133..1ac1531dcfef 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -377,7 +377,6 @@ armpmu_release_hardware(struct arm_pmu *armpmu)
         }
 
         pm_runtime_put_sync(&pmu_device->dev);
-        release_pmu(armpmu->type);
 }
 
 static int
@@ -391,12 +390,6 @@ armpmu_reserve_hardware(struct arm_pmu *armpmu)
         if (!pmu_device)
                 return -ENODEV;
 
-        err = reserve_pmu(armpmu->type);
-        if (err) {
-                pr_warning("unable to reserve pmu\n");
-                return err;
-        }
-
         plat = dev_get_platdata(&pmu_device->dev);
         if (plat && plat->handle_irq)
                 handle_irq = armpmu_platform_irq;
@@ -706,7 +699,6 @@ static void __init cpu_pmu_init(struct arm_pmu *armpmu)
                 raw_spin_lock_init(&events->pmu_lock);
         }
         armpmu->get_hw_events = armpmu_get_cpu_events;
-        armpmu->type = ARM_PMU_DEVICE_CPU;
 }
 
 /*