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| author | Daniel Walker <dwalker@mvista.com> | 2007-03-06 01:42:11 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-06 09:30:25 -0800 |
| commit | 90675a27fa3eb0e97f1d040b183cceb44316e669 (patch) | |
| tree | cf97bd53de877c12798368a4e06bba21285c0763 /kernel/timer.c | |
| parent | 7a434814c7a6500b08bf4419ba8712b152d08d08 (diff) | |
| download | linux-90675a27fa3eb0e97f1d040b183cceb44316e669.tar.gz linux-90675a27fa3eb0e97f1d040b183cceb44316e669.tar.bz2 linux-90675a27fa3eb0e97f1d040b183cceb44316e669.zip | |
[PATCH] fix vsyscall settimeofday
I've only seen this on x86_64.
The vsyscall state only gets updated when a timer interrupts comes in. So
if the time is set long before the next timer, there will be a period when
a gettimeofday() won't reflect the correct time.
I added an explicit update_vsyscall() during the settimeofday(), that way
the vsyscall state doesn't get stale.
Signed-off-by: Daniel Walker <dwalker@mvista.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/timer.c')
| -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 ee0a2da4aab3..797cccb86431 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -862,6 +862,8 @@ int do_settimeofday(struct timespec *tv) clock->error = 0; ntp_clear(); + update_vsyscall(&xtime, clock); + write_sequnlock_irqrestore(&xtime_lock, flags); /* signal hrtimers about time change */ |