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Re: [PATCH v2] thermal: consistently use int for temperatures

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  Re: [PATCH v2] thermal: consistently use int for temperatures Guenter Roeck <linux@roeck-us.net> - 2015-07-24 16:00 +0200

#1191854 — Re: [PATCH v2] thermal: consistently use int for temperatures

On 07/23/2015 11:29 PM, Sascha Hauer wrote:
> On Thu, Jul 23, 2015 at 02:07:59PM +0200, Pavel Machek wrote:
>> On Tue 2015-07-21 09:21:32, Sascha Hauer wrote:
>>> 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.
>>
>> Can we do something like
>>
>> typedef millicelsius_t int;
>>
>> ...to document the units?
>
> I am not very fond of typedefs and I am not sure this adds any value. I
> could change it when more people ask for it, but I just sent the new
> version without this.
>

I thought we are supposed to not introduce new typedefs anyway.

Guenter


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