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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 /arch | |
| parent | 6415ce9a922a1446e7ee0ac9b016082232ebe373 (diff) | |
| download | blackbird-op-linux-19923c190e0932bf0ac1e1d06a48f5c3678dd0de.tar.gz blackbird-op-linux-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 'arch')
| -rw-r--r-- | arch/powerpc/kernel/time.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 742f07a63161..7dd5dab789a1 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -102,7 +102,7 @@ EXPORT_SYMBOL(tb_ticks_per_sec); /* for cputime_t conversions */ u64 tb_to_xs; unsigned tb_to_us; -#define TICKLEN_SCALE (SHIFT_SCALE - 10) +#define TICKLEN_SCALE TICK_LENGTH_SHIFT u64 last_tick_len; /* units are ns / 2^TICKLEN_SCALE */ u64 ticklen_to_xs; /* 0.64 fraction */ @@ -534,7 +534,7 @@ static __inline__ void timer_recalc_offset(u64 cur_tb) if (__USE_RTC()) return; - tlen = current_tick_length(SHIFT_SCALE - 10); + tlen = current_tick_length(); offset = cur_tb - do_gtod.varp->tb_orig_stamp; if (tlen == last_tick_len && offset < 0x80000000u) return; |
