KTIME_SUB_NS(9) Driver Basics KTIME_SUB_NS(9)NAMEktime_sub_ns - Subtract a scalar nanoseconds value from a ktime_t variableSYNOPSISktime_t ktime_sub_ns(const ktime_t kt, u64 nsec);ARGUMENTSkt minuend nsec the scalar nsec value to subtractDESCRIPTIONReturns the subtraction of nsec from kt in ktime_t formatCOPYRIGHTKernel Hackers Manual 2.6. July 2010 KTIME_SUB_NS(9)