linux-kernel - [tip: timers/core] timekeeping: Introduce tkd_basic_setup() to make lock and seqcount init reusable

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Message-ID: <172986803401.1442.2735708155036370167.tip-bot2@tip-bot2>
Date: Fri, 25 Oct 2024 14:53:54 -0000
From: "tip-bot2 for Anna-Maria Behnsen" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Anna-Maria Behnsen" <anna-maria@...utronix.de>,
 Thomas Gleixner <tglx@...utronix.de>, John Stultz <jstultz@...gle.com>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: timers/core] timekeeping: Introduce tkd_basic_setup() to make
 lock and seqcount init reusable

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

Commit-ID:     e202a13aea0cc80266604f3cdbcab9d9b5592a9b
Gitweb:        https://git.kernel.org/tip/e202a13aea0cc80266604f3cdbcab9d9b5592a9b
Author:        Anna-Maria Behnsen <anna-maria@...utronix.de>
AuthorDate:    Wed, 09 Oct 2024 10:29:04 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Fri, 25 Oct 2024 16:41:12 +02:00

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>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: John Stultz <jstultz@...gle.com>
Link: https://lore.kernel.org/all/20241009-devel-anna-maria-b4-timers-ptp-timekeeping-v2-11-554456a44a15@linutronix.de

---
 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 d520c11..cd83dea 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1765,6 +1765,12 @@ 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.
  *
@@ -1792,8 +1798,7 @@ 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) &&