*/
 static struct visorchannel *
 visorchannel_create_guts(u64 physaddr, unsigned long channel_bytes,
-                        gfp_t gfp, unsigned long off,
-                        uuid_le guid, bool needs_lock)
+                        gfp_t gfp, uuid_le guid, bool needs_lock)
 {
        struct visorchannel *channel;
        int err;
 visorchannel_create(u64 physaddr, unsigned long channel_bytes,
                    gfp_t gfp, uuid_le guid)
 {
-       return visorchannel_create_guts(physaddr, channel_bytes, gfp, 0, guid,
+       return visorchannel_create_guts(physaddr, channel_bytes, gfp, guid,
                                        false);
 }
 
 visorchannel_create_with_lock(u64 physaddr, unsigned long channel_bytes,
                              gfp_t gfp, uuid_le guid)
 {
-       return visorchannel_create_guts(physaddr, channel_bytes, gfp, 0, guid,
+       return visorchannel_create_guts(physaddr, channel_bytes, gfp, guid,
                                        true);
 }