[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>
diff --git a/include/linux/timex.h b/include/linux/timex.h
index 1ba3071..19bb653 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -303,8 +303,10 @@
#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 *);