Commit 0f6bc419 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by sanglipeng
Browse files

units: Add SI metric prefix definitions 

stable inclusion
from stable-v5.10.166
commit 8ebc2efcb6d6731c12a3c3b18f9c2d17b651e888
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7TH9O

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8ebc2efcb6d6731c12a3c3b18f9c2d17b651e888



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[ Upstream commit 26471d4a ]

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: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarWolfram Sang <wsa@kernel.org>
Stable-dep-of: c8c37bc5 ("i2c: designware: use casting of u64 in clock multiplication to avoid overflow")
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarsanglipeng <sanglipeng1@jd.com>
parent f5b55052

include/linux/units.h

+16 −0
Original line number Diff line number Diff line
@@ -4,6 +4,22 @@ 


#include <linux/kernel.h>



/* 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