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[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>
This commit is contained in:
Gerrit Renker 2007-06-16 12:38:51 -03:00 committed by David S. Miller
parent dd36a9aba4
commit f1c91da447
1 changed files with 5 additions and 0 deletions
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include/linux/ktime.h
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@ -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