Revert "legion: Remove unnecessarily mapping reference"
Revert "legion: Remove unnecessarily mapping reference"

This reverts commit 6b3b9a72b4a34fceb9b69a52ac82b73849e38950.

StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion