Re: [PATCH 1/2] thermal/core: Use clamp() helper in the stepwise governor

From: Daniel Lezcano
Date: Wed Jul 06 2022 - 08:07:41 EST


On 29/06/2022 17:10, Daniel Lezcano wrote:
The code is actually clampling the next cooling device state using the
lowest and highest states of the thermal instance.

That code can be replaced by the clamp() macro which does exactly the
same. It results in a simpler routine to read.

Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---

I'll apply this series if nobody has comments


drivers/thermal/gov_step_wise.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/thermal/gov_step_wise.c b/drivers/thermal/gov_step_wise.c
index 12acb12aac50..6efbfaf014da 100644
--- a/drivers/thermal/gov_step_wise.c
+++ b/drivers/thermal/gov_step_wise.c
@@ -11,6 +11,7 @@
*/
#include <linux/thermal.h>
+#include <linux/minmax.h>
#include <trace/events/thermal.h>
#include "thermal_core.h"
@@ -52,10 +53,7 @@ static unsigned long get_target_state(struct thermal_instance *instance,
if (!instance->initialized) {
if (throttle) {
- next_target = (cur_state + 1) >= instance->upper ?
- instance->upper :
- ((cur_state + 1) < instance->lower ?
- instance->lower : (cur_state + 1));
+ next_target = clamp((cur_state + 1), instance->lower, instance->upper);
} else {
next_target = THERMAL_NO_TARGET;
}
@@ -66,10 +64,7 @@ static unsigned long get_target_state(struct thermal_instance *instance,
switch (trend) {
case THERMAL_TREND_RAISING:
if (throttle) {
- next_target = cur_state < instance->upper ?
- (cur_state + 1) : instance->upper;
- if (next_target < instance->lower)
- next_target = instance->lower;
+ next_target = clamp((cur_state + 1), instance->lower, instance->upper);
}
break;
case THERMAL_TREND_RAISE_FULL:
@@ -82,9 +77,7 @@ static unsigned long get_target_state(struct thermal_instance *instance,
next_target = THERMAL_NO_TARGET;
} else {
if (!throttle) {
- next_target = cur_state - 1;
- if (next_target > instance->upper)
- next_target = instance->upper;
+ next_target = clamp((cur_state - 1), instance->lower, instance->upper);
}
}
break;


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