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| author | Roman Zippel <zippel@linux-m68k.org> | 2006-06-26 00:25:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 09:58:21 -0700 |
| commit | 19923c190e0932bf0ac1e1d06a48f5c3678dd0de (patch) | |
| tree | 2a32f5f16b3bbebd74c0f4910493c7f28a70fd84 /include/linux/timex.h | |
| parent | 6415ce9a922a1446e7ee0ac9b016082232ebe373 (diff) | |
| download | lwn-19923c190e0932bf0ac1e1d06a48f5c3678dd0de.tar.gz lwn-19923c190e0932bf0ac1e1d06a48f5c3678dd0de.zip | |
[PATCH] fix and optimize clock source update
This fixes the clock source updates in update_wall_time() to correctly
track the time coming in via current_tick_length(). Optimize the fast
paths to be as short as possible to keep the overhead low.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Acked-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/timex.h')
| -rw-r--r-- | include/linux/timex.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/timex.h b/include/linux/timex.h index 1ba3071fcb82..19bb6538b49e 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -303,8 +303,10 @@ time_interpolator_reset(void) #endif /* !CONFIG_TIME_INTERPOLATION */ +#define TICK_LENGTH_SHIFT 32 + /* Returns how long ticks are at present, in ns / 2^(SHIFT_SCALE-10). */ -extern u64 current_tick_length(long); +extern u64 current_tick_length(void); extern int do_adjtimex(struct timex *); |