This fix allowed me to compile the vsock module:

http://kramfs.com/vmware-server-2-unable-to-build-the-vsock-module/

That, and changing line 157 of linux/util.c from
Log(buf);
to
Log("%s\n",buf);

(I found that in another link that I've misplaced)

I updated the vsock.tar with the changed files and put it in /usr/lib/vmware-tools/modules/source/vsock.tar so vmware-config-tools could find the files.