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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-22 15:48:43 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-25 18:38:15 +0100 |
| commit | 2b9d1496e7835a603c340e8f0dd81f4b74d5f248 (patch) | |
| tree | 419904a23470733179a0ecd647263777b2f8e780 /include/linux/timex.h | |
| parent | e96291653b2e4df02f160b574070f6e632868e5e (diff) | |
| download | lwn-2b9d1496e7835a603c340e8f0dd81f4b74d5f248.tar.gz lwn-2b9d1496e7835a603c340e8f0dd81f4b74d5f248.zip | |
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>
Diffstat (limited to 'include/linux/timex.h')
| -rw-r--r-- | include/linux/timex.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/timex.h b/include/linux/timex.h index 998a55d80acf..aa3475fcff64 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -190,7 +190,7 @@ struct timex { * 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) |