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SubjectRe: [PATCH resend v1 1/3] units: Add SI metric prefix definitions
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On 6/3/21 7:04 PM, Andy Shevchenko wrote:
> Sometimes it's useful to have well-defined SI metric prefix to be used
> to self-describe the formulas or equations.
>
> List most popular ones in the units.h.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> include/linux/units.h | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/include/linux/units.h b/include/linux/units.h
> index dcc30a53fa93..7366fcd45ec2 100644
> --- a/include/linux/units.h
> +++ b/include/linux/units.h
> @@ -4,6 +4,22 @@
>
> #include <linux/math.h>
>
> +/* Metric prefixes in accordance with Système international (d'unités) */
> +#define PETA 1000000000000000LL
> +#define TERA 1000000000000LL
> +#define GIGA 1000000000L
> +#define MEGA 1000000L
> +#define KILO 1000L
> +#define HECTO 100L
> +#define DECA 10L
> +#define DECI 10L
> +#define CENTI 100L
> +#define MILLI 1000L
> +#define MICRO 1000000L
> +#define NANO 1000000000L
> +#define PICO 1000000000000LL
> +#define FEMTO 1000000000000000LL
> +

For me milli is always 1/1000. Might lead to confusion with these
defines if idea is to multiply with KILO but divide with MILLI?

Jarkko

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