> -----Original Message----- > From: Punit Agrawal [mailto:punit.agrawal@xxxxxxx] > Sent: Tuesday, July 21, 2015 6:52 PM > To: Sascha Hauer > Cc: linux-pm@xxxxxxxxxxxxxxx; Zhang, Rui; Eduardo Valentin; linux- > kernel@xxxxxxxxxxxxxxx; Jean Delvare; Peter Feuerer; Heiko Stuebner; > Lukasz Majewski; Stephen Warren; Thierry Reding; linux- > acpi@xxxxxxxxxxxxxxx; platform-driver-x86@xxxxxxxxxxxxxxx; linux-arm- > kernel@xxxxxxxxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx; linux-samsung- > soc@xxxxxxxxxxxxxxx; Guenter Roeck; Rafael J. Wysocki; Maxime Ripard; > Darren Hart; lm-sensors@xxxxxxxxxxxxxx > Subject: Re: [PATCH v2] thermal: consistently use int for temperatures > Importance: High > > Hi Sascha, > > Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx> > > Acked-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> > > Reviewed-by: Jean Delvare <jdelvare@xxxxxxx> > > Reviewed-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx> > > Reviewed-by: Darren Hart <dvhart@xxxxxxxxxxxxxxx> > > Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx> > > Reviewed-by: Peter Feuerer <peter@xxxxxxxx> > > Cc: Punit Agrawal <punit.agrawal@xxxxxxx> > > The changes below look good. > > For the power_allocator governor and corresponding trace events, > > Reviewed-by: Punit Agrawal <punit.agrawal@xxxxxxx> > > Thanks > > > Cc: Zhang Rui <rui.zhang@xxxxxxxxx> > > Cc: Eduardo Valentin <edubezval@xxxxxxxxx> > > Cc: linux-pm@xxxxxxxxxxxxxxx > > Cc: linux-kernel@xxxxxxxxxxxxxxx > > Cc: Jean Delvare <jdelvare@xxxxxxx> > > Cc: Peter Feuerer <peter@xxxxxxxx> > > Cc: Heiko Stuebner <heiko@xxxxxxxxx> > > Cc: Lukasz Majewski <l.majewski@xxxxxxxxxxx> > > Cc: Stephen Warren <swarren@xxxxxxxxxxxxx> > > Cc: Thierry Reding <thierry.reding@xxxxxxxxx> > > Cc: linux-acpi@xxxxxxxxxxxxxxx > > Cc: platform-driver-x86@xxxxxxxxxxxxxxx > > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > > Cc: linux-omap@xxxxxxxxxxxxxxx > > Cc: linux-samsung-soc@xxxxxxxxxxxxxxx > > Cc: Guenter Roeck <linux@xxxxxxxxxxxx> > > Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> > > Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> > > Cc: Darren Hart <dvhart@xxxxxxxxxxxxx> > > Cc: lm-sensors@xxxxxxxxxxxxxx > > --- > > Patch applied. Thanks, rui > > changes since v1: > > - Add missing pieces for power_allocator driver > > > > drivers/acpi/thermal.c | 12 +++++----- > > drivers/hwmon/lm75.c | 2 +- > > drivers/hwmon/ntc_thermistor.c | 2 +- > > drivers/hwmon/tmp102.c | 2 +- > > drivers/input/touchscreen/sun4i-ts.c | 8 +++---- > > drivers/platform/x86/acerhdf.c | 9 ++++---- > > drivers/platform/x86/intel_mid_thermal.c | 9 ++++---- > > drivers/power/power_supply_core.c | 2 +- > > drivers/thermal/armada_thermal.c | 2 +- > > drivers/thermal/db8500_thermal.c | 7 +++--- > > drivers/thermal/dove_thermal.c | 2 +- > > drivers/thermal/fair_share.c | 2 +- > > drivers/thermal/gov_bang_bang.c | 5 ++-- > > drivers/thermal/hisi_thermal.c | 4 ++-- > > drivers/thermal/imx_thermal.c | 27 +++++++++++----------- > > drivers/thermal/int340x_thermal/int3400_thermal.c | 2 +- > > .../thermal/int340x_thermal/int340x_thermal_zone.c | 10 ++++---- > > .../thermal/int340x_thermal/int340x_thermal_zone.h | 8 +++---- > > .../int340x_thermal/processor_thermal_device.c | 4 ++-- > > drivers/thermal/intel_quark_dts_thermal.c | 13 +++++------ > > drivers/thermal/intel_soc_dts_iosf.c | 8 +++---- > > drivers/thermal/kirkwood_thermal.c | 2 +- > > drivers/thermal/of-thermal.c | 14 +++++------ > > drivers/thermal/power_allocator.c | 16 ++++++------- > > drivers/thermal/qcom-spmi-temp-alarm.c | 2 +- > > drivers/thermal/rcar_thermal.c | 7 +++--- > > drivers/thermal/rockchip_thermal.c | 10 ++++---- > > drivers/thermal/samsung/exynos_tmu.c | 23 +++++++++--------- > > drivers/thermal/spear_thermal.c | 2 +- > > drivers/thermal/st/st_thermal.c | 5 ++-- > > drivers/thermal/step_wise.c | 4 ++-- > > drivers/thermal/tegra_soctherm.c | 4 ++-- > > drivers/thermal/thermal_core.c | 26 ++++++++++----------- > > drivers/thermal/thermal_hwmon.c | 10 ++++---- > > drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 10 ++++---- > > drivers/thermal/x86_pkg_temp_thermal.c | 10 ++++---- > > include/linux/thermal.h | 26 +++++++++------------ > > include/trace/events/thermal_power_allocator.h | 6 ++--- > > 38 files changed, 151 insertions(+), 166 deletions(-) > > > > [...] > > > diff --git a/drivers/thermal/power_allocator.c > > b/drivers/thermal/power_allocator.c > > index 4672250..045aea59 100644 > > --- a/drivers/thermal/power_allocator.c > > +++ b/drivers/thermal/power_allocator.c > > @@ -92,8 +92,8 @@ 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; > > @@ -102,7 +102,7 @@ static u32 pid_controller(struct > > thermal_zone_device *tz, > > > > max_power_frac = int_to_frac(max_allocatable_power); > > > > - err = ((s32)control_temp - (s32)current_temp); > > + err = control_temp - current_temp; > > err = int_to_frac(err); > > > > /* Calculate the proportional term */ @@ -223,8 +223,8 @@ 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; @@ - > 326,7 > > +326,7 @@ static int allocate_power(struct thermal_zone_device *tz, > > granted_power, total_granted_power, > > num_actors, power_range, > > max_allocatable_power, current_temp, > > - (s32)control_temp - (s32)current_temp); > > + control_temp - current_temp); > > > > devm_kfree(&tz->device, req_power); > > unlock: > > @@ -411,7 +411,7 @@ 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 +476,7 @@ > > 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), ��.n��������+%������w��{.n������_���v��z����n�r������&��z�ޗ�zf���h���~����������_��+v���)ߣ�
