u64 physaddr;
 
        physaddr = virt_to_phys(¶ms);
-       ISSUE_IO_VMCALL(VMCALL_IO_CONTROLVM_ADDR, physaddr, result);
+       ISSUE_IO_VMCALL(VMCALL_CONTROLVM_ADDR, physaddr, result);
        if (VMCALL_SUCCESSFUL(result)) {
                *control_addr = params.address;
                *control_bytes = params.channel_bytes;
 
        return result;
 }
 
-#ifdef VMCALL_IO_CONTROLVM_ADDR
-#undef VMCALL_IO_CONTROLVM_ADDR
+#ifdef VMCALL_CONTROLVM_ADDR
+#undef VMCALL_CONTROLVM_ADDR
 #endif /*  */
 
 /* define subsystem number for AppOS, used in uislib driver  */
             *   type of VMCALL
             */
        /* used by all Guests, not just IO */
-       VMCALL_IO_CONTROLVM_ADDR = 0x0501,
+       VMCALL_CONTROLVM_ADDR = 0x0501,
        /* Allow caller to query virtual time offset */
        VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET = 0x0708,
        /* LOGEVENT Post Code (RDX) with specified subsystem mask */
 
 /* Structures for IO VMCALLs */
 
-/* Parameters to VMCALL_IO_CONTROLVM_ADDR interface */
+/* Parameters to VMCALL_CONTROLVM_ADDR interface */
 struct vmcall_io_controlvm_addr_params {
        /* The Guest-relative physical address of the ControlVm channel. */
        /* This VMCall fills this in with the appropriate address. */