NS_PER_SEC         80 drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c #define NS_PER_SEC      1000000000ULL
NS_PER_SEC         11 tools/testing/selftests/bpf/progs/netcnt_prog.c #define NS_PER_SEC	1000000000
NS_PER_SEC         15 tools/testing/selftests/bpf/progs/test_tc_edt.c #define NS_PER_SEC 1000000000