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

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index d520c11e912de34b4ef1ae58e023e2f3ab643cee..cd83deafd3c2f8584307752b60860d1c3405b74d 100644 (file)
--- 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) &&