__constant_le16_to_cpu   23 include/uapi/linux/byteorder/big_endian.h #define __constant_le16_to_cpu(x) ___constant_swab16((__force __u16)(__le16)(x))
__constant_le16_to_cpu   23 include/uapi/linux/byteorder/little_endian.h #define __constant_le16_to_cpu(x) ((__force __u16)(__le16)(x))