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d3aabeb7b5
Currently we keep an internal buffer of device memory that is used to indicate ownership of a port. Since we only use this as a single bit we can simply turn this into a bitfield. I did this manually rather than having a separate type as we need very special handling of the masks used to interact with the locks. Reviewed By: JonChesterfield Differential Revision: https://reviews.llvm.org/D155511