/* Request and verify all valid register sets. */
        /* TODO: BUILD TIME CHECK: TEST_ASSERT(KVM_SYNC_X86_NUM_FIELDS != 3); */
        run->kvm_valid_regs = TEST_SYNC_FIELDS;
-       rv = _vcpu_run(vcpu);
+       vcpu_run(vcpu);
        TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
 
        vcpu_regs_get(vcpu, ®s);
 
        run->kvm_valid_regs = TEST_SYNC_FIELDS;
        run->kvm_dirty_regs = KVM_SYNC_X86_REGS | KVM_SYNC_X86_SREGS;
-       rv = _vcpu_run(vcpu);
+       vcpu_run(vcpu);
        TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
        TEST_ASSERT(run->s.regs.regs.rbx == 0xBAD1DEA + 1,
                    "rbx sync regs value incorrect 0x%llx.",
        run->kvm_valid_regs = TEST_SYNC_FIELDS;
        run->kvm_dirty_regs = 0;
        run->s.regs.regs.rbx = 0xDEADBEEF;
-       rv = _vcpu_run(vcpu);
+       vcpu_run(vcpu);
        TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
        TEST_ASSERT(run->s.regs.regs.rbx != 0xDEADBEEF,
                    "rbx sync regs value incorrect 0x%llx.",
        run->s.regs.regs.rbx = 0xAAAA;
        regs.rbx = 0xBAC0;
        vcpu_regs_set(vcpu, ®s);
-       rv = _vcpu_run(vcpu);
+       vcpu_run(vcpu);
        TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
        TEST_ASSERT(run->s.regs.regs.rbx == 0xAAAA,
                    "rbx sync regs value incorrect 0x%llx.",
        run->kvm_valid_regs = 0;
        run->kvm_dirty_regs = TEST_SYNC_FIELDS;
        run->s.regs.regs.rbx = 0xBBBB;
-       rv = _vcpu_run(vcpu);
+       vcpu_run(vcpu);
        TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
        TEST_ASSERT(run->s.regs.regs.rbx == 0xBBBB,
                    "rbx sync regs value incorrect 0x%llx.",