NVM_GEN_LUN_BITS   46 include/linux/lightnvm.h 			u64 lun		: NVM_GEN_LUN_BITS;
NVM_GEN_LUN_BITS   54 include/linux/lightnvm.h 			u64 lun		: NVM_GEN_LUN_BITS;
NVM_GEN_LUN_BITS   65 include/linux/lightnvm.h 			u64 pu		: NVM_GEN_LUN_BITS;