On Fri, Aug 09, 2013 at 03:56:03PM -0400, Mike Snitzer wrote: > This reverts commit f3002134158092178be81339ec5a22ff80e6c308. > > div64_u64_rem was removed because there were no other users. > > But Device Mapper's I/O statistics support has a need for > div64_u64_rem; reintroduce this helper.
This slows down div64_u64 operation, especially on 32-bit systems. Since dm statistic code is possibly not performance critical perhaps you could use something like below instead to calculate remainder: res = div64_u64(a, b); rem = a - b*res; Stanislaw -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
