On Wed, Jul 15, 2020 at 10:05:08AM +0800, Leo Yan wrote: > [leoyan: Use quot/rem to convert cyc to ns to avoid overflow]
> + quot = rd->epoch_cyc >> rd->shift; > + rem = rd->epoch_cyc & (((u64)1 << rd->shift) - 1); > + ns = quot * rd->mult + ((rem * rd->mult) >> rd->shift); > + userpg->time_zero -= ns; I think we have mul_u64_u32_shr() for that.
