[KTIME]: Introduce ktime_us_delta
This provides a reusable time difference function which returns the difference in
microseconds, as often used in the DCCP code.
Commiter note: renamed ktime_delta to ktime_us_delta and put it in ktime.h.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index 2b139f6..9236659 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -279,6 +279,11 @@
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
