commit 2b9d1496e7835a603c340e8f0dd81f4b74d5f248
author Ingo Molnar <mingo@elte.hu> Sun Feb 22 15:48:43 2009 +0100
committer Ingo Molnar <mingo@elte.hu> Wed Feb 25 18:38:15 2009 +0100
tree 419904a23470733179a0ecd647263777b2f8e780
parent e96291653b2e4df02f160b574070f6e632868e5e

time: ntp: make 64-bit constants more robust

Impact: cleanup, no functionality changed

 - make PPM_SCALE an explicit s64 constant, to
   remove (s64) casts from usage sites.

kernel/time/ntp.o:

   text	   data	    bss	    dec	    hex	filename
   2536	    114	    136	   2786	    ae2	ntp.o.before
   2536	    114	    136	   2786	    ae2	ntp.o.after

md5:
   40a7728d1188aa18e83e21a81fa7b150  ntp.o.before.asm
   40a7728d1188aa18e83e21a81fa7b150  ntp.o.after.asm

Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/linux/timex.h

diff --git a/include/linux/timex.h b/include/linux/timex.h
index 998a55d..aa3475f 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -190,7 +190,7 @@
  * offset and maximum frequency tolerance.
  */
 #define SHIFT_USEC 16		/* frequency offset scale (shift) */
-#define PPM_SCALE (NSEC_PER_USEC << (NTP_SCALE_SHIFT - SHIFT_USEC))
+#define PPM_SCALE ((s64)NSEC_PER_USEC << (NTP_SCALE_SHIFT - SHIFT_USEC))
 #define PPM_SCALE_INV_SHIFT 19
 #define PPM_SCALE_INV ((1ll << (PPM_SCALE_INV_SHIFT + NTP_SCALE_SHIFT)) / \
 		       PPM_SCALE + 1)