[PATCH] sched/cpufreq: Reorder so non-SCX is common path

[Christian Loehle <christian.loehle@arm.com>]

scx_enabled() with sugov is probably the rarer case to fair with
sugov, so reorder the condition into scx_enabled() check instead of
the !scx_switched_all() check so the static branch is not checked when
sched_ext isn't enabled.

No functional change intended.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Christian Loehle <christian.loehle@arm.com>
---
@Peter
We probably also want the analogous reorder in sugov then....

 kernel/sched/cpufreq_schedutil.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 153232dd8276..06bd453a37eb 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -225,10 +225,16 @@ unsigned long sugov_effective_cpu_perf(int cpu, unsigned long actual,
 
 static void sugov_get_util(struct sugov_cpu *sg_cpu, unsigned long boost)
 {
-	unsigned long min, max, util = scx_cpuperf_target(sg_cpu->cpu);
+	unsigned long min, max, util = cpu_util_cfs_boost(sg_cpu->cpu);
 
-	if (!scx_switched_all())
-		util += cpu_util_cfs_boost(sg_cpu->cpu);
+	if (scx_enabled()) {
+		unsigned long scx_util = scx_cpuperf_target(sg_cpu->cpu);
+
+		if (!scx_switched_all())
+			scx_util += util;
+
+		util = scx_util;
+	}
 	util = effective_cpu_util(sg_cpu->cpu, util, &min, &max);
 	util = max(util, boost);
 	sg_cpu->bw_min = min;
-- 
2.34.1