From: Sebastian Andrzej Siewior Date: Mon, 12 Aug 2024 12:51:04 +0200 Subject: [PATCH 1/2] timers: Add sparse annotation for timer_sync_wait_running(). Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.11/older/patches-6.11-rt7.tar.xz 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. Link: https://lore.kernel.org/r/20240812105326.2240000-2-bigeasy@linutronix.de Signed-off-by: Sebastian Andrzej Siewior --- kernel/time/timer.c | 2 ++ 1 file changed, 2 insertions(+) --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1561,6 +1561,8 @@ static inline void timer_base_unlock_exp * 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);