__constant_le64_to_cpu   20 include/uapi/linux/byteorder/big_endian.h #define __constant_le64_to_cpu(x) ___constant_swab64((__force __u64)(__le64)(x))
__constant_le64_to_cpu   20 include/uapi/linux/byteorder/little_endian.h #define __constant_le64_to_cpu(x) ((__force __u64)(__le64)(x))