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locking/rtmutex: Remove empty and unused debug stubs

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No users or useless and therefore just ballast.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210326153943.549192485@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-03-26 16:29:34 +01:00 committed by Ingo Molnar
parent 199cacd1a6
commit 8188d74e68
5 changed files with 2 additions and 44 deletions
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14
include/linux/rtmutex.h
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@ -40,18 +40,9 @@ struct rt_mutex_waiter;
struct hrtimer_sleeper;
#ifdef CONFIG_DEBUG_RT_MUTEXES
extern int rt_mutex_debug_check_no_locks_freed(const void *from,
unsigned long len);
extern void rt_mutex_debug_check_no_locks_held(struct task_struct *task);
extern void rt_mutex_debug_task_free(struct task_struct *tsk);
extern void rt_mutex_debug_task_free(struct task_struct *tsk);
#else
static inline int rt_mutex_debug_check_no_locks_freed(const void *from,
unsigned long len)
{
return 0;
}
# define rt_mutex_debug_check_no_locks_held(task) do { } while (0)
# define rt_mutex_debug_task_free(t) do { } while (0)
static inline void rt_mutex_debug_task_free(struct task_struct *tsk) { }
#endif
#define rt_mutex_init(mutex) \
@ -88,7 +79,6 @@ static inline int rt_mutex_is_locked(struct rt_mutex *lock)
}
extern void __rt_mutex_init(struct rt_mutex *lock, const char *name, struct lock_class_key *key);
extern void rt_mutex_destroy(struct rt_mutex *lock);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
extern void rt_mutex_lock_nested(struct rt_mutex *lock, unsigned int subclass);

9
kernel/locking/rtmutex-debug.c
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@ -38,20 +38,11 @@ void rt_mutex_debug_task_free(struct task_struct *task)
DEBUG_LOCKS_WARN_ON(task->pi_blocked_on);
}
void debug_rt_mutex_lock(struct rt_mutex *lock)
{
}
void debug_rt_mutex_unlock(struct rt_mutex *lock)
{
DEBUG_LOCKS_WARN_ON(rt_mutex_owner(lock) != current);
}
void
debug_rt_mutex_proxy_lock(struct rt_mutex *lock, struct task_struct *powner)
{
}
void debug_rt_mutex_proxy_unlock(struct rt_mutex *lock)
{
DEBUG_LOCKS_WARN_ON(!rt_mutex_owner(lock));

3
kernel/locking/rtmutex-debug.h
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@ -13,10 +13,7 @@
extern void debug_rt_mutex_init_waiter(struct rt_mutex_waiter *waiter);
extern void debug_rt_mutex_free_waiter(struct rt_mutex_waiter *waiter);
extern void debug_rt_mutex_init(struct rt_mutex *lock, const char *name, struct lock_class_key *key);
extern void debug_rt_mutex_lock(struct rt_mutex *lock);
extern void debug_rt_mutex_unlock(struct rt_mutex *lock);
extern void debug_rt_mutex_proxy_lock(struct rt_mutex *lock,
struct task_struct *powner);
extern void debug_rt_mutex_proxy_unlock(struct rt_mutex *lock);
static inline bool debug_rt_mutex_detect_deadlock(struct rt_mutex_waiter *waiter,

18
kernel/locking/rtmutex.c
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@ -885,9 +885,6 @@ static int try_to_take_rt_mutex(struct rt_mutex *lock, struct task_struct *task,
raw_spin_unlock(&task->pi_lock);
takeit:
/* We got the lock. */
debug_rt_mutex_lock(lock);
/*
* This either preserves the RT_MUTEX_HAS_WAITERS bit if there
* are still waiters or clears it.
@ -1580,20 +1577,6 @@ void __sched rt_mutex_futex_unlock(struct rt_mutex *lock)
rt_mutex_postunlock(&wake_q);
}
/**
* rt_mutex_destroy - mark a mutex unusable
* @lock: the mutex to be destroyed
*
* This function marks the mutex uninitialized, and any subsequent
* use of the mutex is forbidden. The mutex must not be locked when
* this function is called.
*/
void rt_mutex_destroy(struct rt_mutex *lock)
{
WARN_ON(rt_mutex_is_locked(lock));
}
EXPORT_SYMBOL_GPL(rt_mutex_destroy);
/**
* __rt_mutex_init - initialize the rt_mutex
*
@ -1635,7 +1618,6 @@ void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
struct task_struct *proxy_owner)
{
__rt_mutex_init(lock, NULL, NULL);
debug_rt_mutex_proxy_lock(lock, proxy_owner);
rt_mutex_set_owner(lock, proxy_owner);
}

2
kernel/locking/rtmutex.h
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@ -13,8 +13,6 @@
#define debug_rt_mutex_init_waiter(w) do { } while (0)
#define debug_rt_mutex_free_waiter(w) do { } while (0)
#define debug_rt_mutex_lock(l) do { } while (0)
#define debug_rt_mutex_proxy_lock(l,p) do { } while (0)
#define debug_rt_mutex_proxy_unlock(l) do { } while (0)
#define debug_rt_mutex_unlock(l) do { } while (0)
#define debug_rt_mutex_init(m, n, k) do { } while (0)