diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2007-03-16 13:38:21 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-16 19:25:05 -0700 |
| commit | ad28d94abb1313bdf27e196676292c493f92f824 (patch) | |
| tree | 447f451b04b548c1e0bdc700f0697baf742895c5 /kernel/hrtimer.c | |
| parent | c6ca97d26a7efe9488174336bc67fdaea01aad49 (diff) | |
| download | lwn-ad28d94abb1313bdf27e196676292c493f92f824.tar.gz lwn-ad28d94abb1313bdf27e196676292c493f92f824.zip | |
[PATCH] hrtimer: fix up unlocked access to wall_to_monotonic
commit f4304ab21513b834c8fe3403927c60c2b81a72d7 (HZ free NTP) moved the
access to wall_to_monotonic in hrtimer_get_softirq_time() out of the
xtime_lock protection.
Move it back into the seq_lock section.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/hrtimer.c')
| -rw-r--r-- | kernel/hrtimer.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 5e7122d3f46f..6a7938a0d513 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -135,7 +135,7 @@ EXPORT_SYMBOL_GPL(ktime_get_ts); static void hrtimer_get_softirq_time(struct hrtimer_cpu_base *base) { ktime_t xtim, tomono; - struct timespec xts; + struct timespec xts, tom; unsigned long seq; do { @@ -145,10 +145,11 @@ static void hrtimer_get_softirq_time(struct hrtimer_cpu_base *base) #else xts = xtime; #endif + tom = wall_to_monotonic; } while (read_seqretry(&xtime_lock, seq)); xtim = timespec_to_ktime(xts); - tomono = timespec_to_ktime(wall_to_monotonic); + tomono = timespec_to_ktime(tom); base->clock_base[CLOCK_REALTIME].softirq_time = xtim; base->clock_base[CLOCK_MONOTONIC].softirq_time = ktime_add(xtim, tomono); |