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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2007-06-16 12:38:51 -0300
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-10 22:15:25 -0700
commitf1c91da44728fba24927e44056a56e507c11cf7b (patch)
tree0b5c2347c91d364a71b39c9ed24a36c172aeef6b
parentdd36a9aba44e4ddbac011de2cb14a70444487303 (diff)
[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>
-rw-r--r--include/linux/ktime.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index 2b139f66027f..923665958f90 100644
--- a/include/linux/ktime.h
+++ b/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