diff --git a/[refs] b/[refs]
index 96c0597d400d..8983ba453d8b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: dd36a9aba44e4ddbac011de2cb14a70444487303
+refs/heads/master: f1c91da44728fba24927e44056a56e507c11cf7b
diff --git a/trunk/include/linux/ktime.h b/trunk/include/linux/ktime.h
index 2b139f66027f..923665958f90 100644
--- a/trunk/include/linux/ktime.h
+++ b/trunk/include/linux/ktime.h
@@ -279,6 +279,11 @@ static inline s64 ktime_to_us(const ktime_t kt)
 	return (s64) tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
 }
 
+static inline s64 ktime_us_delta(const ktime_t later, const ktime_t earlier)
+{
+       return ktime_to_us(ktime_sub(later, earlier));
+}
+
 /*
  * The resolution of the clocks. The resolution value is returned in
  * the clock_getres() system call to give application programmers an