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| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2006-03-06 15:42:51 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-06 18:40:44 -0800 |
| commit | 5aee405c662ca644980c184774277fc6d0769a84 (patch) | |
| tree | e8a74f57b4866e2ab0f6adac5dec174e8dbf17c0 | |
| parent | a615fa83959896f8eac76c235953fb164cd1a9b9 (diff) | |
| download | lwn-5aee405c662ca644980c184774277fc6d0769a84.tar.gz lwn-5aee405c662ca644980c184774277fc6d0769a84.zip | |
[PATCH] time: add barrier after updating jiffies_64
Add a compiler barrier so that we don't read jiffies before updating
jiffies_64.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | kernel/timer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index 8256f3f5ec0d..bf7c4193b936 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -941,6 +941,8 @@ static inline void update_times(void) void do_timer(struct pt_regs *regs) { jiffies_64++; + /* prevent loading jiffies before storing new jiffies_64 value. */ + barrier(); update_times(); softlockup_tick(regs); } |