doug@s15:~/temp-k-git-3.10rc4/linux/drivers/cpufreq$ diff -u intel_pstate.c.315rc5.dirk3 intel_pstate.c.315rc5.dirk5
--- intel_pstate.c.315rc5.dirk3 2014-05-22 08:09:49.307336907 -0700
+++ intel_pstate.c.315rc5.dirk5 2014-05-26 12:03:20.581940162 -0700
@@ -567,7 +567,7 @@
        int32_t rem;

        core_pct = int_tofp(sample->aperf) * int_tofp(100);
-       core_pct = div_s64_rem(core_pct, int_tofp(sample->mperf), &rem);
+       core_pct = div_u64_rem(core_pct, int_tofp(sample->mperf), &rem);

        if ((rem << 1) >= int_tofp((sample->mperf)))
                core_pct += 1;
@@ -627,7 +627,7 @@
        if (duration_us > sample_time * 10) {
                sample_ratio = div_fp(int_tofp(sample_time),
                                int_tofp(duration_us));
-               core_busy = mul_fp(core_busy, sample_ratio);
+//             core_busy = mul_fp(core_busy, sample_ratio);
        }

        return core_busy;