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locking/rt: Add sparse annotation PREEMPT_RT's sleeping locks.

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The sleeping locks on PREEMPT_RT (rt_spin_lock() and friends) lack
sparse annotation. Therefore a missing spin_unlock() won't be spotted by
sparse in a PREEMPT_RT build while it is noticed on a !PREEMPT_RT build.

Add the __acquires/__releases macros to the lock/ unlock functions. The
trylock functions already use the __cond_lock() wrapper.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240812104200.2239232-2-bigeasy@linutronix.de
This commit is contained in:
Sebastian Andrzej Siewior 2024-08-12 12:39:02 +02:00 committed by Thomas Gleixner
parent 2628cbd039
commit 52e0874fc1
2 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/linux/rwlock_rt.h
View File

@ -24,13 +24,13 @@ do { \
__rt_rwlock_init(rwl, #rwl, &__key); \
} while (0)
extern void rt_read_lock(rwlock_t *rwlock);
extern void rt_read_lock(rwlock_t *rwlock) __acquires(rwlock);
extern int rt_read_trylock(rwlock_t *rwlock);
extern void rt_read_unlock(rwlock_t *rwlock);
extern void rt_write_lock(rwlock_t *rwlock);
extern void rt_write_lock_nested(rwlock_t *rwlock, int subclass);
extern void rt_read_unlock(rwlock_t *rwlock) __releases(rwlock);
extern void rt_write_lock(rwlock_t *rwlock) __acquires(rwlock);
extern void rt_write_lock_nested(rwlock_t *rwlock, int subclass) __acquires(rwlock);
extern int rt_write_trylock(rwlock_t *rwlock);
extern void rt_write_unlock(rwlock_t *rwlock);
extern void rt_write_unlock(rwlock_t *rwlock) __releases(rwlock);
static __always_inline void read_lock(rwlock_t *rwlock)
{

8
include/linux/spinlock_rt.h
View File

@ -32,10 +32,10 @@ do { \
__rt_spin_lock_init(slock, #slock, &__key, true); \
} while (0)
extern void rt_spin_lock(spinlock_t *lock);
extern void rt_spin_lock_nested(spinlock_t *lock, int subclass);
extern void rt_spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *nest_lock);
extern void rt_spin_unlock(spinlock_t *lock);
extern void rt_spin_lock(spinlock_t *lock) __acquires(lock);
extern void rt_spin_lock_nested(spinlock_t *lock, int subclass) __acquires(lock);
extern void rt_spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *nest_lock) __acquires(lock);
extern void rt_spin_unlock(spinlock_t *lock) __releases(lock);
extern void rt_spin_lock_unlock(spinlock_t *lock);
extern int rt_spin_trylock_bh(spinlock_t *lock);
extern int rt_spin_trylock(spinlock_t *lock);