netdev - [PATCH v2 11/25] timekeeping: Introduce tkd_basic_setup() to make lock and seqcount init reusable

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Message-Id: <20241009-devel-anna-maria-b4-timers-ptp-timekeeping-v2-11-554456a44a15@linutronix.de>
Date: Wed, 09 Oct 2024 10:29:04 +0200
From: Anna-Maria Behnsen <anna-maria@...utronix.de>
To: John Stultz <jstultz@...gle.com>, 
 Frederic Weisbecker <frederic@...nel.org>, 
 Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
 Miroslav Lichvar <mlichvar@...hat.com>, 
 Richard Cochran <richardcochran@...il.com>, 
 Christopher S Hall <christopher.s.hall@...el.com>, 
 Anna-Maria Behnsen <anna-maria@...utronix.de>
Subject: [PATCH v2 11/25] timekeeping: Introduce tkd_basic_setup() to make
 lock and seqcount init reusable

Initialization of lock and seqcount needs to be done for every instance of
timekeeper struct. To be able to easily reuse it, create a separate
function for it.

Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
---
v2: new in v2 - splitted from another patch
---
 kernel/time/timekeeping.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 40c60bb88416..a98f823be6db 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1734,6 +1734,12 @@ read_persistent_wall_and_boot_offset(struct timespec64 *wall_time,
 	*boot_offset = ns_to_timespec64(local_clock());
 }
 
+static __init void tkd_basic_setup(struct tk_data *tkd)
+{
+	raw_spin_lock_init(&tkd->lock);
+	seqcount_raw_spinlock_init(&tkd->seq, &tkd->lock);
+}
+
 /*
  * Flag reflecting whether timekeeping_resume() has injected sleeptime.
  *
@@ -1761,8 +1767,7 @@ void __init timekeeping_init(void)
 	struct timekeeper *tk = &tk_core.timekeeper;
 	struct clocksource *clock;
 
-	raw_spin_lock_init(&tk_core.lock);
-	seqcount_raw_spinlock_init(&tk_core.seq, &tkd->lock);
+	tkd_basic_setup(&tk_core);
 
 	read_persistent_wall_and_boot_offset(&wall_time, &boot_offset);
 	if (timespec64_valid_settod(&wall_time) &&

-- 
2.39.5