__cpu_to_le64      31 include/uapi/linux/byteorder/big_endian.h #define __cpu_to_le64(x) ((__force __le64)__swab64((x)))
__cpu_to_le64      31 include/uapi/linux/byteorder/little_endian.h #define __cpu_to_le64(x) ((__force __le64)(__u64)(x))