From: Andy Shevchenko Date: Mon, 12 Jul 2021 14:20:25 +0000 (+0300) Subject: units: Add SI metric prefix definitions X-Git-Tag: v5.15-rc1~164^2~14 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=26471d4a6cf8;p=thirdparty%2Fkernel%2Flinux.git units: Add SI metric prefix definitions 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 Signed-off-by: Wolfram Sang --- diff --git a/include/linux/units.h b/include/linux/units.h index dcc30a53fa939..4a25e0cc8fb33 100644 --- a/include/linux/units.h +++ b/include/linux/units.h @@ -4,6 +4,22 @@ #include +/* Metric prefixes in accordance with Système international (d'unités) */ +#define PETA 1000000000000000ULL +#define TERA 1000000000000ULL +#define GIGA 1000000000UL +#define MEGA 1000000UL +#define KILO 1000UL +#define HECTO 100UL +#define DECA 10UL +#define DECI 10UL +#define CENTI 100UL +#define MILLI 1000UL +#define MICRO 1000000UL +#define NANO 1000000000UL +#define PICO 1000000000000ULL +#define FEMTO 1000000000000000ULL + #define MILLIWATT_PER_WATT 1000L #define MICROWATT_PER_MILLIWATT 1000L #define MICROWATT_PER_WATT 1000000L