[PATCH v2 1/6] thermal: trip: Simplify computing trip indices

Rafael J. Wysocki
2023-10-12T18:35:09Z

A trip index can be computed right away as a difference between the
value of a trip pointer pointing to the given trip object and the
start of the trips[] table in the given thermal zone, so change
thermal_zone_trip_id() accordingly.

No intentional functional impact (except for some speedup).

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

v1 -> v2: Rebase on top of current linux-next

---
drivers/thermal/thermal_trip.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)

Index: linux-pm/drivers/thermal/thermal_trip.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_trip.c
+++ linux-pm/drivers/thermal/thermal_trip.c
@@ -173,12 +173,9 @@ int thermal_zone_set_trip(struct thermal
int thermal_zone_trip_id(struct thermal_zone_device *tz,
const struct thermal_trip *trip)
{
- int i;
-
- for (i = 0; i < tz->num_trips; i++) {
- if (&tz->trips[i] == trip)
- return i;
- }
-
- return -ENODATA;
+ /*
+ * Assume the trip to be located within the bounds of the thermal
+ * zone's trips[] table.
+ */
+ return trip - tz->trips;
}