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authorThomas Gleixner <tglx@linutronix.de>2007-03-16 13:38:21 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-16 19:25:05 -0700
commitad28d94abb1313bdf27e196676292c493f92f824 (patch)
tree447f451b04b548c1e0bdc700f0697baf742895c5
parentc6ca97d26a7efe9488174336bc67fdaea01aad49 (diff)
downloadlinux-linaro-stable-ad28d94abb1313bdf27e196676292c493f92f824.tar.gz
[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>
-rw-r--r--kernel/hrtimer.c5
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);