KVM: s390: Add "devname:kvm" alias.

Providing a "devname:kvm" module alias enables automatic loading of
the kvm module when /dev/kvm is opened.
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NGleb Natapov <gleb@redhat.com>

arch/s390/kvm/kvm-s390.c

@@ -1138,3 +1138,12 @@ static void __exit kvm_s390_exit(void)
 
 module_init(kvm_s390_init);
 module_exit(kvm_s390_exit);
+
+/*
+ * Enable autoloading of the kvm module.
+ * Note that we add the module alias here instead of virt/kvm/kvm_main.c
+ * since x86 takes a different approach.
+ */
+#include <linux/miscdevice.h>
+MODULE_ALIAS_MISCDEV(KVM_MINOR);
+MODULE_ALIAS("devname:kvm");