Thanks to ooo for pointing this out
https://aur.archlinux.org/packages/linux-ck/#comment-762177

--- a/patch-5.7-ck1	2020-06-10 00:59:29.000000000 +0300
+++ b/patch-5.7-ck1	2020-08-23 13:42:46.304190376 +0300
@@ -12162,7 +12162,7 @@
 @@ -211,7 +217,7 @@ unsigned long schedutil_cpu_util(int cpu, unsigned long util_cfs,
  	struct rq *rq = cpu_rq(cpu);
  
- 	if (!IS_BUILTIN(CONFIG_UCLAMP_TASK) &&
+ 	if (!uclamp_is_used() &&
 -	    type == FREQUENCY_UTIL && rt_rq_is_runnable(&rq->rt)) {
 +	    type == FREQUENCY_UTIL && rt_rq_runnable(rq)) {
  		return max;