diff --git a/include/linux/time.h b/include/linux/time.h
index 88d3b81..65dd85b 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -102,6 +102,7 @@
 extern void getnstimeofday(struct timespec *tv);
 
 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
+extern int timekeeping_is_continuous(void);
 
 /**
  * timespec_to_ns - Convert timespec to nanoseconds
@@ -144,6 +145,20 @@
  */
 extern struct timeval ns_to_timeval(const s64 nsec);
 
+/**
+ * timespec_add_ns - Adds nanoseconds to a timespec
+ * @a:		pointer to timespec to be incremented
+ * @ns:		unsigned nanoseconds value to be added
+ */
+static inline void timespec_add_ns(struct timespec *a, u64 ns)
+{
+	ns += a->tv_nsec;
+	while(unlikely(ns >= NSEC_PER_SEC)) {
+		ns -= NSEC_PER_SEC;
+		a->tv_sec++;
+	}
+	a->tv_nsec = ns;
+}
 #endif /* __KERNEL__ */
 
 #define NFDBITS			__NFDBITS