siphash_2u64
u64 siphash_2u64(const u64 a, const u64 b, const siphash_key_t *key);
return siphash_2u64((u64)b << 32 | a, (u64)d << 32 | c, key);
return siphash_2u64(le64_to_cpu(data[0]), le64_to_cpu(data[1]),
EXPORT_SYMBOL(siphash_2u64);