[PATCH 1/4] KVM: arm/arm64: extract duplicated code to own function

[Andrew Murray <andrew.murray@xxxxxxx>]

Let's reduce code duplication by extracting common code to its own
function.

Signed-off-by: Andrew Murray <andrew.murray@xxxxxxx>
---
 virt/kvm/arm/pmu.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index 1c5b76c..531d27f 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -65,6 +65,19 @@ void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val)
 }
 
 /**
+ * kvm_pmu_release_perf_event - remove the perf event
+ * @pmc: The PMU counter pointer
+ */
+static void kvm_pmu_release_perf_event(struct kvm_pmc *pmc)
+{
+	if (pmc->perf_event) {
+		perf_event_disable(pmc->perf_event);
+		perf_event_release_kernel(pmc->perf_event);
+		pmc->perf_event = NULL;
+	}
+}
+
+/**
  * kvm_pmu_stop_counter - stop PMU counter
  * @pmc: The PMU counter pointer
  *
@@ -79,9 +92,7 @@ static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu, struct kvm_pmc *pmc)
 		reg = (pmc->idx == ARMV8_PMU_CYCLE_IDX)
 		       ? PMCCNTR_EL0 : PMEVCNTR0_EL0 + pmc->idx;
 		__vcpu_sys_reg(vcpu, reg) = counter;
-		perf_event_disable(pmc->perf_event);
-		perf_event_release_kernel(pmc->perf_event);
-		pmc->perf_event = NULL;
+		kvm_pmu_release_perf_event(pmc);
 	}
 }
 
@@ -114,12 +125,7 @@ void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu)
 
 	for (i = 0; i < ARMV8_PMU_MAX_COUNTERS; i++) {
 		struct kvm_pmc *pmc = &pmu->pmc[i];
-
-		if (pmc->perf_event) {
-			perf_event_disable(pmc->perf_event);
-			perf_event_release_kernel(pmc->perf_event);
-			pmc->perf_event = NULL;
-		}
+		kvm_pmu_release_perf_event(pmc);
 	}
 }
 
-- 
2.7.4

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