+#define delay(ticks) schedule_timeout_uninterruptible(ticks)
+
+#define SEC_TO_TICK(sec) ((sec) * HZ)
+#define MSEC_TO_TICK(ms) msecs_to_jiffies(ms)
+#define USEC_TO_TICK(us) usecs_to_jiffies(us)
+#define NSEC_TO_TICK(ns) usecs_to_jiffies(ns / NSEC_PER_USEC)