Re: [PATCH v3 1/4] iio: prepare iio_format_value to handle higher-precision IIO_VAL_DECIMAL64_* formats

[Victor Chernyakin]

> > +#define GREATEST_POWER_OF_10_THAT_FITS_IN_S64 18
> 
> It's an interesting name for log10(2^63).
> 
> This, along with log10(2^64 - 1) should be added as definitions at least
> IIO-wide. There is a series that wanted similar for u64.

In that case, might as well go all the way and add them to linux/limits.h?