#define MSEC2NSEC(m) ((hrtime_t)(m) * (NANOSEC / MILLISEC))
#define NSEC2MSEC(n) ((n) / (NANOSEC / MILLISEC))
+#define USEC2NSEC(m) ((hrtime_t)(m) * (NANOSEC / MICROSEC))
+#define NSEC2USEC(n) ((n) / (NANOSEC / MICROSEC))
+
+#define NSEC2SEC(n) ((n) / (NANOSEC / SEC))
+#define SEC2NSEC(m) ((hrtime_t)(m) * (NANOSEC / SEC))
+
static const int hz = HZ;
#define TIMESPEC_OVERFLOW(ts) \