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    SubjectRe: [Patch 1/7] timespec diff utility
    Arjan van de Ven wrote:

    >>+/*
    >>+ * timespec_diff_ns - Return difference of two timestamps in nanoseconds
    >>+ * In the rare case of @end being earlier than @start, return zero
    >>+ */
    >>+static inline nsec_t timespec_diff_ns(struct timespec *start, struct timespec *end)
    >>+{
    >>+ nsec_t ret;
    >>+
    >>+ ret = (nsec_t)(end->tv_sec - start->tv_sec)*NSEC_PER_SEC;
    >>+ ret += (nsec_t)(end->tv_nsec - start->tv_nsec);
    >>+ if (ret < 0)
    >>+ return 0;
    >>+ return ret;
    >>+}
    >> #endif /* __KERNEL__ */
    >>
    >>
    >>
    >
    >wouldn't it be more useful to have this return a timespec as well, and
    >then it'd be generically useful (and it also probably should then be
    >uninlined ;)
    >
    >
    Return another timespec to store the difference of two input timespecs ?
    Would that be useful ?
    Didn't quite get it.

    --Shailabh




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