diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 2a5f7f38006ff9c5729ac9ce1be0ffd8a6dc7e5e..f680f303ba7cca9f217ad2854aa6dc9d3d86e2c3 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -675,8 +675,8 @@ unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len);
 int kvm_handle_mmio_return(struct kvm_vcpu *vcpu);
 int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa);
 
-int kvm_perf_init(void);
-int kvm_perf_teardown(void);
+void kvm_perf_init(void);
+void kvm_perf_teardown(void);
 
 long kvm_hypercall_pv_features(struct kvm_vcpu *vcpu);
 gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu);
diff --git a/arch/arm64/kvm/perf.c b/arch/arm64/kvm/perf.c
index c84fe24b2ea1e8f1f3a2ab6e1f6e6c9bb46801ed..a0d660cf889e1cc1030c45235e458895ea4ab9e5 100644
--- a/arch/arm64/kvm/perf.c
+++ b/arch/arm64/kvm/perf.c
@@ -48,12 +48,12 @@ static struct perf_guest_info_callbacks kvm_guest_cbs = {
 	.get_guest_ip	= kvm_get_guest_ip,
 };
 
-int kvm_perf_init(void)
+void kvm_perf_init(void)
 {
-	return perf_register_guest_info_callbacks(&kvm_guest_cbs);
+	perf_register_guest_info_callbacks(&kvm_guest_cbs);
 }
 
-int kvm_perf_teardown(void)
+void kvm_perf_teardown(void)
 {
-	return perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
+	perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
 }
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 318c489b735bcd5f33be90000756e1cffbad4174..98c204488496de73fe48b5e7d948e43dc873c9bc 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1252,8 +1252,8 @@ static inline struct perf_guest_info_callbacks *perf_get_guest_cbs(void)
 	 */
 	return rcu_dereference(perf_guest_cbs);
 }
-extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
-extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
+extern void perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs);
+extern void perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs);
 
 extern void perf_event_exec(void);
 extern void perf_event_comm(struct task_struct *tsk, bool exec);
@@ -1497,10 +1497,10 @@ perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)	{ }
 static inline void
 perf_bp_event(struct perf_event *event, void *data)			{ }
 
-static inline int perf_register_guest_info_callbacks
-(struct perf_guest_info_callbacks *callbacks)				{ return 0; }
-static inline int perf_unregister_guest_info_callbacks
-(struct perf_guest_info_callbacks *callbacks)				{ return 0; }
+static inline void perf_register_guest_info_callbacks
+(struct perf_guest_info_callbacks *cbs)					{ }
+static inline void perf_unregister_guest_info_callbacks
+(struct perf_guest_info_callbacks *cbs)					{ }
 
 static inline void perf_event_mmap(struct vm_area_struct *vma)		{ }
 
diff --git a/kernel/events/core.c b/kernel/events/core.c
index c552e1bfcaea2f5d53c54551dd97549bc759a7ab..17e5b20762c50df8965a83da0599efa7d2da5b37 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6521,31 +6521,24 @@ static void perf_pending_event(struct irq_work *entry)
 		perf_swevent_put_recursion_context(rctx);
 }
 
-/*
- * We assume there is only KVM supporting the callbacks.
- * Later on, we might change it to a list if there is
- * another virtualization implementation supporting the callbacks.
- */
 struct perf_guest_info_callbacks __rcu *perf_guest_cbs;
 
-int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
+void perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
 {
 	if (WARN_ON_ONCE(rcu_access_pointer(perf_guest_cbs)))
-		return -EBUSY;
+		return;
 
 	rcu_assign_pointer(perf_guest_cbs, cbs);
-	return 0;
 }
 EXPORT_SYMBOL_GPL(perf_register_guest_info_callbacks);
 
-int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
+void perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
 {
 	if (WARN_ON_ONCE(rcu_access_pointer(perf_guest_cbs) != cbs))
-		return -EINVAL;
+		return;
 
 	rcu_assign_pointer(perf_guest_cbs, NULL);
 	synchronize_rcu();
-	return 0;
 }
 EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);