Description of problem:
The swap token code upstream has been broken for a while (due to the code around it changing), is incompatible with cgroups and has the potential to introduce a scalability problem.
Time to remove it.
Merged in -mm yesterday, will track to make sure we get the removal in the RHEL7 codebase too.
The swap token code is gone upstream, and in the current RHEL7 git tree.