cpufreq: schedutil: Don't jump to max frequency for RT tasks

Android uses a lot of RT threads. Jumping to max frequency for RT tasks
will cause a significant degradation in power that would not be acceptable
for mobile devices. So, stop doing that.

Change-Id: I4e1056c678755014e38eaafe05e890ff2e38c42e
Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Rohit Gupta <rohgup@codeaurora.org>

kernel/sched/cpufreq_schedutil.c

@@ -264,6 +264,7 @@ static void sugov_update_single(struct update_util_data *hook, u64 time,
 	unsigned int next_f;
 	bool busy;
 
+	flags &= ~SCHED_CPUFREQ_RT_DL;
 	sugov_set_iowait_boost(sg_cpu, time, flags);
 	sg_cpu->last_update = time;
 
@@ -343,6 +344,8 @@ static void sugov_update_shared(struct update_util_data *hook, u64 time,
 
 	sugov_get_util(&util, &max, sg_cpu->cpu);
 
+	flags &= ~SCHED_CPUFREQ_RT_DL;
+
 	raw_spin_lock(&sg_policy->update_lock);
 
 	sg_cpu->util = util;