From 26471d4a6cf8d5d0bd0fb55c7169de7d67cc703a Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 12 Jul 2021 17:20:25 +0300
Subject: [PATCH] units: Add SI metric prefix definitions
Git-commit: 26471d4a6cf8d5d0bd0fb55c7169de7d67cc703a
References: git-fixes
Patch-mainline: v5.15-rc1

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>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Oliver Neukum <oneukum@suse.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..4a25e0cc8fb3 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	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
-- 
2.35.3