diff -rupN vmci-only/linux/driver.c vmci-only.new/linux/driver.c
--- vmci-only/linux/driver.c	2016-03-16 21:59:30.229062702 -0400
+++ vmci-only.new/linux/driver.c	2016-03-16 21:58:35.452061974 -0400
@@ -2469,7 +2469,9 @@ vmci_init(void)
 static void __exit
 vmci_exit(void)
 {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
    int retval;
+#endif
 
    if (guestDeviceInit) {
       pci_unregister_driver(&vmci_driver);

diff -rupN vmci-only/linux/driver.c vmci-only.new/linux/driver.c
--- vmci-only/linux/driver.c	2016-03-16 21:53:24.184057841 -0400
+++ vmci-only.new/linux/driver.c	2016-03-16 21:54:37.558058816 -0400
@@ -2482,12 +2482,16 @@ vmci_exit(void)
 
       VMCI_HostCleanup();
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
+      misc_deregister(&linuxState.misc);
+#else
       retval = misc_deregister(&linuxState.misc);
       if (retval) {
          Warning(LGPFX "Module %s: error unregistering\n", VMCI_MODULE_NAME);
       } else {
          Log(LGPFX"Module %s: unloaded\n", VMCI_MODULE_NAME);
       }
+#endif
 
       hostDeviceInit = FALSE;
    }