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SubjectRe: [PATCH] Provide an interface for getting the current tick length
Paul Mackerras <paulus@samba.org> wrote:
>
> +u64 current_tick_length(void)
> +{
> + long time_adjust_step, delta_nsec;
> +
> + if ((time_adjust_step = time_adjust) != 0 ) {

<mutters something about coding style>

> + /*
> + * Limit the amount of the step to be in the range
> + * -tickadj .. +tickadj
> + */
> + time_adjust_step = min(time_adjust_step, (long)tickadj);
> + time_adjust_step = max(time_adjust_step, (long)-tickadj);
> + }
> + delta_nsec = tick_nsec + time_adjust_step * 1000;

Is that going to overflow if sizeof(long) == 4?

> + return ((u64) delta_nsec << (SHIFT_SCALE - 10)) + time_adj;
> +}
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