[PATCH v1 2/6] units: Add value of π * 10⁹

Andy Shevchenko
2025-10-27T14:38:57Z

There are a few drivers that want to have this value, and at least one
known to come soon. Let's define a value for them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
include/linux/units.h | 3 +++
1 file changed, 3 insertions(+)

diff --git a/include/linux/units.h b/include/linux/units.h
index f626e212d4ca..82bdc2041328 100644
--- a/include/linux/units.h
+++ b/include/linux/units.h
@@ -21,6 +21,9 @@
#define PICO 1000000000000ULL
#define FEMTO 1000000000000000ULL

+/* Value of π * 10⁹ */
+#define PI 3141592653LL
+
/* Hz based multipliers */
#define NANOHZ_PER_HZ 1000000000UL
#define MICROHZ_PER_HZ 1000000UL
--
2.50.1