[PATCH] x86_64: Add useful constants to time.h

In timekeeping code, one often does need to use conversion constants. Naming
these leads to code that's easier to understand, showing the reader between
which units the conversion is made.

Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/include/linux/time.h b/include/linux/time.h
index 0cd696cee998..2fa2987c9a07 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -28,10 +28,13 @@ struct timezone {
 #ifdef __KERNEL__
 
 /* Parameters used to convert the timespec values: */
-#define MSEC_PER_SEC            1000L
-#define USEC_PER_SEC            1000000L
-#define NSEC_PER_SEC            1000000000L
-#define NSEC_PER_USEC           1000L
+#define MSEC_PER_SEC    1000L
+#define USEC_PER_MSEC   1000L
+#define NSEC_PER_USEC   1000L
+#define NSEC_PER_MSEC   1000000L
+#define USEC_PER_SEC    1000000L
+#define NSEC_PER_SEC    1000000000L
+#define FSEC_PER_SEC    1000000000000000L
 
 static inline int timespec_equal(struct timespec *a, struct timespec *b)
 {