MPI2_HEADER_VERSION_UNIT_SHIFT  282 drivers/scsi/megaraid/megaraid_sas_fusion.h #define MPI2_HEADER_VERSION_UNIT_SHIFT      (8)
MPI2_HEADER_VERSION_UNIT_SHIFT  168 drivers/scsi/mpt3sas/mpi/mpi2.h #define MPI2_HEADER_VERSION_UNIT_SHIFT      (8)