[02/24] timekeeping: Don't stop time readers across hard_pps() update

Commit Message

Anna-Maria Behnsen Sept. 11, 2024, 1:29 p.m. UTC

From: Thomas Gleixner <[e-mail]>

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 <[e-mail]>
Signed-off-by: Anna-Maria Behnsen <[e-mail]>
---
 kernel/time/timekeeping.c | 4 ----
 1 file changed, 4 deletions(-)

Patch

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index b877173f88bb..f09752bae05d 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -2625,11 +2625,7 @@  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);