In moving the NTP state to be protected by the timekeeping locks, be sure to acquire the timekeeping locks prior to calling ntp functions.
Cc: Thomas Gleixner <t...@linutronix.de> Cc: Richard Cochran <richardcoch...@gmail.com> Cc: Prarit Bhargava <pra...@redhat.com> Signed-off-by: John Stultz <john.stu...@linaro.org> --- kernel/time/timekeeping.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index e44915c..d10bd73 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -787,10 +787,10 @@ void __init timekeeping_init(void) boot.tv_nsec = 0; } - ntp_init(); - raw_spin_lock_irqsave(&timekeeper_lock, flags); write_seqcount_begin(&timekeeper_seq); + ntp_init(); + clock = clocksource_default_clock(); if (clock->enable) clock->enable(clock); @@ -1618,6 +1618,7 @@ EXPORT_SYMBOL_GPL(ktime_get_monotonic_offset); */ int do_adjtimex(struct timex *txc) { + unsigned long flags; struct timespec ts; s32 tai, orig_tai; int ret; @@ -1641,8 +1642,14 @@ int do_adjtimex(struct timex *txc) getnstimeofday(&ts); orig_tai = tai = timekeeping_get_tai_offset(); + raw_spin_lock_irqsave(&timekeeper_lock, flags); + write_seqcount_begin(&timekeeper_seq); + ret = __do_adjtimex(txc, &ts, &tai); + write_seqcount_end(&timekeeper_seq); + raw_spin_unlock_irqrestore(&timekeeper_lock, flags); + if (tai != orig_tai) timekeeping_set_tai_offset(tai); @@ -1655,7 +1662,15 @@ int do_adjtimex(struct timex *txc) */ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts) { + unsigned long flags; + + raw_spin_lock_irqsave(&timekeeper_lock, flags); + write_seqcount_begin(&timekeeper_seq); + __hardpps(phase_ts, raw_ts); + + write_seqcount_end(&timekeeper_seq); + raw_spin_unlock_irqrestore(&timekeeper_lock, flags); } EXPORT_SYMBOL(hardpps); #endif -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/