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authorRoman Zippel <zippel@linux-m68k.org>2006-06-26 00:25:18 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:21 -0700
commit19923c190e0932bf0ac1e1d06a48f5c3678dd0de (patch)
tree2a32f5f16b3bbebd74c0f4910493c7f28a70fd84 /include/linux/timex.h
parent6415ce9a922a1446e7ee0ac9b016082232ebe373 (diff)
downloadlwn-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.h4
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 *);