cpufreq: schedutil: Add freq_to_util helper function

Refactor repetitive code into a function.

Change-Id: I30d53adf0cb0c4ce099f7f1c25cbc8c2f6473769
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 0a0e9aa..2d1be33 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -225,6 +225,13 @@ static void sugov_walt_adjust(struct sugov_cpu *sg_cpu, unsigned long *util,
 		*util = max(*util, sg_cpu->walt_load.pl);
 }
 
+static unsigned long freq_to_util(struct sugov_policy *sg_policy,
+				  unsigned int freq)
+{
+	return mult_frac(sg_policy->max, freq,
+			 sg_policy->policy->cpuinfo.max_freq);
+}
+
 static void sugov_update_single(struct update_util_data *hook, u64 time,
 				unsigned int flags)
 {
@@ -322,12 +329,11 @@ static void sugov_update_shared(struct update_util_data *hook, u64 time,
 	raw_spin_lock(&sg_policy->update_lock);
 
 	if (sg_policy->max != max) {
-		hs_util = mult_frac(max,
-				    sg_policy->tunables->hispeed_freq,
-				    sg_policy->policy->cpuinfo.max_freq);
+		sg_policy->max = max;
+		hs_util = freq_to_util(sg_policy,
+					sg_policy->tunables->hispeed_freq);
 		hs_util = mult_frac(hs_util, TARGET_LOAD, 100);
 		sg_policy->hispeed_util = hs_util;
-		sg_policy->max = max;
 	}
 
 	sg_cpu->util = util;
@@ -438,9 +444,8 @@ static ssize_t hispeed_freq_store(struct gov_attr_set *attr_set,
 
 	tunables->hispeed_freq = val;
 	list_for_each_entry(sg_policy, &attr_set->policy_list, tunables_hook) {
-		hs_util = mult_frac(sg_policy->max,
-				    sg_policy->tunables->hispeed_freq,
-				    sg_policy->policy->cpuinfo.max_freq);
+		hs_util = freq_to_util(sg_policy,
+					sg_policy->tunables->hispeed_freq);
 		hs_util = mult_frac(hs_util, TARGET_LOAD, 100);
 		sg_policy->hispeed_util = hs_util;
 	}