#define cputime64_zero (0ULL)
#define cputime64_add(__a, __b) ((__a) + (__b))
-#define cputime64_sub(__a, __b) ((__a) - (__b))
#define cputime64_to_jiffies64(__ct) (__ct)
-#define jiffies64_to_cputime64(__jif) (__jif)
#define cputime_to_cputime64(__ct) ((u64) __ct)