On Thu, Jul 11, 2019 at 06:47:34PM +0300, Leon Romanovsky wrote: > > > diff --git a/lib/dim/dim.c b/lib/dim/dim.c > > > index 439d641ec796..38045d6d0538 100644 > > > +++ b/lib/dim/dim.c > > > @@ -74,8 +74,8 @@ void dim_calc_stats(struct dim_sample *start, struct dim_sample *end, > > > delta_us); > > > curr_stats->cpms = DIV_ROUND_UP(ncomps * USEC_PER_MSEC, delta_us); > > > if (curr_stats->epms != 0) > > > - curr_stats->cpe_ratio = > > > - (curr_stats->cpms * 100) / curr_stats->epms; > > > + curr_stats->cpe_ratio = DIV_ROUND_DOWN_ULL( > > > + curr_stats->cpms * 100, curr_stats->epms); > > > > This will still potentially overfow the 'int' for cpe_ratio if epms < > > 100 ? > > I assumed that assignment to "unsigned long long" will do the trick. > https://elixir.bootlin.com/linux/latest/source/include/linux/kernel.h#L94 That only protects the multiply, the result of DIV_ROUND_DOWN_ULL is casted to int. Jason
