diff mbox series

[v3,3/3] cpuidle: teo: Drop utilized from struct teo_cpu

Message ID 1953519.PYKUYFuaPT@kreacher
State New
Headers
Series cpuidle: teo: Avoid stopping scheduler tick too often |

Commit Message

Rafael J. Wysocki July 31, 2023, 7:04 p.m. UTC 
  From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Because the utilized field in struct teo_cpu is only used locally in
teo_select(), replace it with a local variable in that function.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

v2 -> v3: No changes

v1 -> v2: New patch

---
 drivers/cpuidle/governors/teo.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
diff mbox series

Patch

Index: linux-pm/drivers/cpuidle/governors/teo.c
===================================================================
--- linux-pm.orig/drivers/cpuidle/governors/teo.c
+++ linux-pm/drivers/cpuidle/governors/teo.c
@@ -187,7 +187,6 @@  struct teo_bin {
  * @next_recent_idx: Index of the next @recent_idx entry to update.
  * @recent_idx: Indices of bins corresponding to recent "intercepts".
  * @util_threshold: Threshold above which the CPU is considered utilized
- * @utilized: Whether the last sleep on the CPU happened while utilized
  */
 struct teo_cpu {
 	s64 time_span_ns;
@@ -197,7 +196,6 @@  struct teo_cpu {
 	int next_recent_idx;
 	int recent_idx[NR_RECENT];
 	unsigned long util_threshold;
-	bool utilized;
 };
 
 static DEFINE_PER_CPU(struct teo_cpu, teo_cpus);
@@ -366,6 +364,7 @@  static int teo_select(struct cpuidle_dri
 	int idx0 = 0, idx = -1;
 	bool alt_intercepts, alt_recent;
 	ktime_t delta_tick;
+	bool cpu_utilized;
 	s64 duration_ns;
 	int i;
 
@@ -391,13 +390,13 @@  static int teo_select(struct cpuidle_dri
 			goto out_tick;
 	}
 
-	cpu_data->utilized = teo_cpu_is_utilized(dev->cpu, cpu_data);
+	cpu_utilized = teo_cpu_is_utilized(dev->cpu, cpu_data);
 	/*
 	 * If the CPU is being utilized over the threshold and there are only 2
 	 * states to choose from, the metrics need not be considered, so choose
 	 * the shallowest non-polling state and exit.
 	 */
-	if (drv->state_count < 3 && cpu_data->utilized) {
+	if (drv->state_count < 3 && cpu_utilized) {
 		/* The CPU is utilized, so assume a short idle duration. */
 		duration_ns = teo_middle_of_bin(0, drv);
 		/*
@@ -562,7 +561,7 @@  static int teo_select(struct cpuidle_dri
 	 * been stopped already and the shallower state's target residency is
 	 * not sufficiently large.
 	 */
-	if (cpu_data->utilized) {
+	if (cpu_utilized) {
 		s64 span_ns;
 
 		i = teo_find_shallower_state(drv, dev, idx, duration_ns, true);