The following commit has been merged into the locking/core branch of tip:
Commit-ID: 77abd3b7d9bf384306872b6201b1dfeb1e899892
Gitweb: https://git.kernel.org/tip/77abd3b7d9bf384306872b6201b1dfeb1e899892
Author: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
AuthorDate: Mon, 12 Aug 2024 12:39:05 +02:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 24 Oct 2024 11:27:02 +02:00
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 <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20240812104200.2239232-5-bigeasy@xxxxxxxxxxxxx
---
kernel/locking/rtmutex.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index ebebd0e..d3b72c2 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;
|