Just updated VMware to the latest version 11.1.2 on the test system, and it compiles/loads OK with Kernel 4.1-rc8..
Release notes are here: https://www.vmware.com/support/ws/doc/workstation-1112-release-notes.html.
At last, there is no need for the venerable vmnet patch (required since Kernel 3.19 was released..)..
Robert Gadsdon. June 18, 2015.