PTR_FIELD          88 include/uapi/linux/bcache.h PTR_FIELD(PTR_DEV,			51, PTR_DEV_BITS)
PTR_FIELD          89 include/uapi/linux/bcache.h PTR_FIELD(PTR_OFFSET,			8,  43)
PTR_FIELD          90 include/uapi/linux/bcache.h PTR_FIELD(PTR_GEN,			0,  8)