[PATCH] thermal: consistently use int for temperatures
From: Punit Agrawal <hidden>
Date: 2015-07-17 11:17:24
Also in:
linux-acpi, linux-omap, linux-pm, linux-samsung-soc, lkml, platform-driver-x86
Subsystem:
the rest, thermal, tracing · Maintainers:
Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano, Steven Rostedt, Masami Hiramatsu
Possibly related (same subject, not in this thread)
- 2015-07-08 · Re: [PATCH] thermal: consistently use int for temperatures · Peter Feuerer <peter@piie.net>
- 2015-07-06 · Re: [PATCH] thermal: consistently use int for temperatures · Heiko Stübner <heiko@sntech.de>
- 2015-07-06 · Re: [PATCH] thermal: consistently use int for temperatures · Darren Hart <dvhart@infradead.org>
- 2015-07-06 · Re: [PATCH] thermal: consistently use int for temperatures · Lukasz Majewski <hidden>
- 2015-07-06 · Re: [PATCH] thermal: consistently use int for temperatures · Jean Delvare <hidden>
Hi Sascha, Sascha Hauer [off-list ref] writes:
The thermal code uses int, long and unsigned long for temperatures in different places. Using an unsigned type limits the thermal framework to positive temperatures without need. Also several drivers currently will report temperatures near UINT_MAX for temperatures below 0?C. This will probably immediately shut the machine down due to overtemperature if started below 0?C. 'long' is 64bit on several architectures. This is not needed since INT_MAX ?mC is above the melting point of all known materials. Consistently use a plain 'int' for temperatures throughout the thermal code and the drivers. This only changes the places in the drivers where the temperature is passed around as pointer, when drivers internally use another type this is not changed. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Thanks for moving over the thermal sub-system in Linux to consistently use a single type. In your patch, you missed migrating over power_allocator governor and it's associated trace events. It got merged for v4.2. Could you incorporate something like below in your next version? Thanks, Punit [...] --------------->8----------------------- Subject: [PATCH] Use int for temperature in power_allocator governor --- drivers/thermal/power_allocator.c | 10 ++++------ include/trace/events/thermal_power_allocator.h | 6 +++--- 2 files changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/thermal/power_allocator.c b/drivers/thermal/power_allocator.c
index 4672250..1bb7d7f 100644
--- a/drivers/thermal/power_allocator.c
+++ b/drivers/thermal/power_allocator.c@@ -92,8 +92,7 @@ struct power_allocator_params { * Return: The power budget for the next period. */ static u32 pid_controller(struct thermal_zone_device *tz, - unsigned long current_temp, - unsigned long control_temp, + int current_temp, int control_temp, u32 max_allocatable_power) { s64 p, i, d, power_range;
@@ -223,8 +222,7 @@ static void divvy_up_power(u32 *req_power, u32 *max_power, int num_actors, } static int allocate_power(struct thermal_zone_device *tz, - unsigned long current_temp, - unsigned long control_temp) + int current_temp, int control_temp) { struct thermal_instance *instance; struct power_allocator_params *params = tz->governor_data;
@@ -411,7 +409,7 @@ static int power_allocator_bind(struct thermal_zone_device *tz) { int ret; struct power_allocator_params *params; - unsigned long switch_on_temp, control_temp; + int switch_on_temp, control_temp; u32 temperature_threshold; if (!tz->tzp || !tz->tzp->sustainable_power) {
@@ -476,7 +474,7 @@ static void power_allocator_unbind(struct thermal_zone_device *tz) static int power_allocator_throttle(struct thermal_zone_device *tz, int trip) { int ret; - unsigned long switch_on_temp, control_temp, current_temp; + int switch_on_temp, control_temp, current_temp; struct power_allocator_params *params = tz->governor_data; /*
diff --git a/include/trace/events/thermal_power_allocator.h b/include/trace/events/thermal_power_allocator.h
index 12e1321..5afae8f 100644
--- a/include/trace/events/thermal_power_allocator.h
+++ b/include/trace/events/thermal_power_allocator.h@@ -11,7 +11,7 @@ TRACE_EVENT(thermal_power_allocator, u32 total_req_power, u32 *granted_power, u32 total_granted_power, size_t num_actors, u32 power_range, u32 max_allocatable_power, - unsigned long current_temp, s32 delta_temp), + int current_temp, s32 delta_temp), TP_ARGS(tz, req_power, total_req_power, granted_power, total_granted_power, num_actors, power_range, max_allocatable_power, current_temp, delta_temp),
@@ -24,7 +24,7 @@ TRACE_EVENT(thermal_power_allocator, __field(size_t, num_actors ) __field(u32, power_range ) __field(u32, max_allocatable_power ) - __field(unsigned long, current_temp ) + __field(int, current_temp ) __field(s32, delta_temp ) ), TP_fast_assign(
@@ -42,7 +42,7 @@ TRACE_EVENT(thermal_power_allocator, __entry->delta_temp = delta_temp; ), - TP_printk("thermal_zone_id=%d req_power={%s} total_req_power=%u granted_power={%s} total_granted_power=%u power_range=%u max_allocatable_power=%u current_temperature=%lu delta_temperature=%d", + TP_printk("thermal_zone_id=%d req_power={%s} total_req_power=%u granted_power={%s} total_granted_power=%u power_range=%u max_allocatable_power=%u current_temperature=%d delta_temperature=%d", __entry->tz_id, __print_array(__get_dynamic_array(req_power), __entry->num_actors, 4),
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2.1.2