timers: Add sparse annotation for timer_sync_wait_running().

timer_sync_wait_running() first releases two locks and then acquires
them again. This is unexpected and sparse complains about it.

Add sparse annotation for timer_sync_wait_running() to note that the
locking is expected.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240812105326.2240000-2-bigeasy@linutronix.de

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 64b0d8a0aa0f100270bc6824a6ede4b59fa6d537..429232d8659a361f629f441fff7a629bfa6e309e 100644 (file)
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1561,6 +1561,8 @@ static inline void timer_base_unlock_expiry(struct timer_base *base)
  * the waiter to acquire the lock and make progress.
  */
 static void timer_sync_wait_running(struct timer_base *base)
+       __releases(&base->lock) __releases(&base->expiry_lock)
+       __acquires(&base->expiry_lock) __acquires(&base->lock)
 {
        if (atomic_read(&base->timer_waiters)) {
                raw_spin_unlock_irq(&base->lock);