Re: [PATCH] Clean up thermal API

[Pavel Machek]

On Wed 2008-06-11 11:06:47, Matthew Garrett wrote:
> The thermal layer passes temperatures around as strings. This is fine 
> for sysfs, but makes it hard to use them for other purposes in-kernel. 
> Change them to longs and do the string conversion in the sysfs-specific 
> code.
> 
> Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>
> 
> ---
> 
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 504385b..28b3782 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -886,7 +886,8 @@ static void acpi_thermal_check(void *data)
>  /* sys I/F for generic thermal sysfs support */
>  #define KELVIN_TO_MILLICELSIUS(t) (t * 100 - 273200)
>  
> -static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
> +static int thermal_get_temp(struct thermal_zone_device *thermal, 
> +			    unsigned long *temp)

Hmm, ulong is really wrong:

1) temperature in celsius can easily go below zero.

2) it can hardly go above 2000000C, so int should be enough.

							Pavel
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