linux-kernel - [PATCH v1 2/2] thermal/debugfs: Add helper function for trip stats updates

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Date: Mon, 15 Apr 2024 21:03:06 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Lukasz Luba <lukasz.luba@....com>,
 Daniel Lezcano <daniel.lezcano@...aro.org>
Subject:
 [PATCH v1 2/2] thermal/debugfs: Add helper function for trip stats updates

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

The code updating a trip_stats entry in thermal_debug_tz_trip_up()
and thermal_debug_update_temp() is almost entirely duplicate, so move
it to a new helper function that will be called from both these places.

While at it, drop a redundant tz_dbg->nr_trips check and a label related
to it from thermal_debug_update_temp().

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/thermal/thermal_debugfs.c |   42 +++++++++++++++++---------------------
 1 file changed, 19 insertions(+), 23 deletions(-)

Index: linux-pm/drivers/thermal/thermal_debugfs.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_debugfs.c
+++ linux-pm/drivers/thermal/thermal_debugfs.c
@@ -539,6 +539,19 @@ static struct tz_episode *thermal_debugf
 	return tze;
 }
 
+static struct trip_stats *update_tz_episode(struct tz_debugfs *tz_dbg,
+					    int trip_id, int temperature)
+{
+	struct tz_episode *tze = list_first_entry(&tz_dbg->tz_episodes,
+						  struct tz_episode, node);
+	struct trip_stats *trip_stats = &tze->trip_stats[trip_id];
+
+	trip_stats->max = max(trip_stats->max, temperature);
+	trip_stats->min = min(trip_stats->min, temperature);
+	trip_stats->avg += (temperature - trip_stats->avg) / ++trip_stats->count;
+	return trip_stats;
+}
+
 void thermal_debug_tz_trip_up(struct thermal_zone_device *tz,
 			      const struct thermal_trip *trip)
 {
@@ -547,6 +560,7 @@ void thermal_debug_tz_trip_up(struct the
 	struct thermal_debugfs *thermal_dbg = tz->debugfs;
 	int temperature = tz->temperature;
 	int trip_id = thermal_zone_trip_id(tz, trip);
+	struct trip_stats *trip_stats;
 	ktime_t now = ktime_get();
 
 	if (!thermal_dbg)
@@ -612,14 +626,8 @@ void thermal_debug_tz_trip_up(struct the
 	 */
 	tz_dbg->trips_crossed[tz_dbg->nr_trips++] = trip_id;
 
-	tze = list_first_entry(&tz_dbg->tz_episodes, struct tz_episode, node);
-	tze->trip_stats[trip_id].timestamp = now;
-	tze->trip_stats[trip_id].max = max(tze->trip_stats[trip_id].max, temperature);
-	tze->trip_stats[trip_id].min = min(tze->trip_stats[trip_id].min, temperature);
-	tze->trip_stats[trip_id].count++;
-	tze->trip_stats[trip_id].avg = tze->trip_stats[trip_id].avg +
-		(temperature - tze->trip_stats[trip_id].avg) /
-		tze->trip_stats[trip_id].count;
+	trip_stats = update_tz_episode(tz_dbg, trip_id, temperature);
+	trip_stats->timestamp = now;
 
 unlock:
 	mutex_unlock(&thermal_dbg->lock);
@@ -686,9 +694,8 @@ out:
 void thermal_debug_update_temp(struct thermal_zone_device *tz)
 {
 	struct thermal_debugfs *thermal_dbg = tz->debugfs;
-	struct tz_episode *tze;
 	struct tz_debugfs *tz_dbg;
-	int trip_id, i;
+	int i;
 
 	if (!thermal_dbg)
 		return;
@@ -697,20 +704,9 @@ void thermal_debug_update_temp(struct th
 
 	tz_dbg = &thermal_dbg->tz_dbg;
 
-	if (!tz_dbg->nr_trips)
-		goto out;
+	for (i = 0; i < tz_dbg->nr_trips; i++)
+		update_tz_episode(tz_dbg, tz_dbg->trips_crossed[i], tz->temperature);
 
-	for (i = 0; i < tz_dbg->nr_trips; i++) {
-		trip_id = tz_dbg->trips_crossed[i];
-		tze = list_first_entry(&tz_dbg->tz_episodes, struct tz_episode, node);
-		tze->trip_stats[trip_id].count++;
-		tze->trip_stats[trip_id].max = max(tze->trip_stats[trip_id].max, tz->temperature);
-		tze->trip_stats[trip_id].min = min(tze->trip_stats[trip_id].min, tz->temperature);
-		tze->trip_stats[trip_id].avg = tze->trip_stats[trip_id].avg +
-			(tz->temperature - tze->trip_stats[trip_id].avg) /
-			tze->trip_stats[trip_id].count;
-	}
-out:
 	mutex_unlock(&thermal_dbg->lock);
 }