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timekeeping: Don't stop time readers across hard_pps() update

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hard_pps() update does not modify anything which might be required by time
readers so forcing readers out of the way during the update is a pointless
exercise.

The interaction with adjtimex() and timekeeper updates which call into the
NTP code is properly serialized by timekeeper_lock.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241009-devel-anna-maria-b4-timers-ptp-timekeeping-v2-2-554456a44a15@linutronix.de
This commit is contained in:
Thomas Gleixner 2024-10-09 10:28:55 +02:00
parent 14f1e3b3df
commit 886150fb4f
1 changed files with 0 additions and 4 deletions
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4
kernel/time/timekeeping.c
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@ -2746,11 +2746,7 @@ void hardpps(const struct timespec64 *phase_ts, const struct timespec64 *raw_ts)
unsigned long flags;
raw_spin_lock_irqsave(&timekeeper_lock, flags);
write_seqcount_begin(&tk_core.seq);
__hardpps(phase_ts, raw_ts);
write_seqcount_end(&tk_core.seq);
raw_spin_unlock_irqrestore(&timekeeper_lock, flags);
}
EXPORT_SYMBOL(hardpps);