[tip: timers/ptp] pps: Convert to ktime_get_snapshot_id()

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the timers/ptp branch of tip:

Commit-ID:     d5becddf8a0f18bcc18129efa086530b5263c6b4
Gitweb:        https://git.kernel.org/tip/d5becddf8a0f18bcc18129efa086530b5263c6b4
Author:        Thomas Gleixner <tglx@xxxxxxxxxx>
AuthorDate:    Fri, 29 May 2026 22:00:04 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxx>
CommitterDate: Tue, 02 Jun 2026 11:39:58 +02:00

pps: Convert to ktime_get_snapshot_id()

ktime_get_snapshot() resolves to ktime_get_snapshot_id(CLOCK_REALTIME).

Make it obvious in the code and convert the readout to use the
snapshot::systime and monoraw fields instead of snapshot::real and raw,
which aregoing away.

Similar to the PPS generators, avoid the more expensive snapshot when
CONFIG_NTP_PPS is disabled.

No functional change intended.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxx>
Tested-by: Arthur Kiyanovski <akiyano@xxxxxxxxxx>
Reviewed-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@xxxxxxxxxxxxx>
Reviewed-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
Link: https://patch.msgid.link/20260529195557.123410250@xxxxxxxxxx
---
 include/linux/pps_kernel.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/include/linux/pps_kernel.h b/include/linux/pps_kernel.h
index aab0aeb..9f088c9 100644
--- a/include/linux/pps_kernel.h
+++ b/include/linux/pps_kernel.h
@@ -99,12 +99,14 @@ static inline void timespec_to_pps_ktime(struct pps_ktime *kt,
 
 static inline void pps_get_ts(struct pps_event_time *ts)
 {
+#ifdef CONFIG_NTP_PPS
 	struct system_time_snapshot snap;
 
-	ktime_get_snapshot(&snap);
-	ts->ts_real = ktime_to_timespec64(snap.real);
-#ifdef CONFIG_NTP_PPS
-	ts->ts_raw = ktime_to_timespec64(snap.raw);
+	ktime_get_snapshot_id(CLOCK_REALTIME, &snap);
+	ts->ts_real = ktime_to_timespec64(snap.systime);
+	ts->ts_raw = ktime_to_timespec64(snap.monoraw);
+#else
+	ktime_get_real_ts64(&ts->ts_real);
 #endif
 }