From 77abd3b7d9bf384306872b6201b1dfeb1e899892 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Mon, 12 Aug 2024 12:39:05 +0200 Subject: [PATCH] locking/rt: Annotate unlock followed by lock for sparse. rt_mutex_slowlock_block() and rtlock_slowlock_locked() both unlock lock::wait_lock and then lock it later. This is unusual and sparse complains about it. Add __releases() + __acquires() annotation to mark that it is expected. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20240812104200.2239232-5-bigeasy@linutronix.de --- kernel/locking/rtmutex.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index ebebd0eec7f63..d3b72c2f983f7 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -1601,6 +1601,7 @@ static int __sched rt_mutex_slowlock_block(struct rt_mutex_base *lock, unsigned int state, struct hrtimer_sleeper *timeout, struct rt_mutex_waiter *waiter) + __releases(&lock->wait_lock) __acquires(&lock->wait_lock) { struct rt_mutex *rtm = container_of(lock, struct rt_mutex, rtmutex); struct task_struct *owner; @@ -1805,6 +1806,7 @@ static __always_inline int __rt_mutex_lock(struct rt_mutex_base *lock, * @lock: The underlying RT mutex */ static void __sched rtlock_slowlock_locked(struct rt_mutex_base *lock) + __releases(&lock->wait_lock) __acquires(&lock->wait_lock) { struct rt_mutex_waiter waiter; struct task_struct *owner; -- 2.50.1