1/*
2 * Mutexes: blocking mutual exclusion locks
3 *
4 * started by Ingo Molnar:
5 *
6 *  Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
7 *
8 * This file contains mutex debugging related internal declarations,
9 * prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case.
10 * More details are in kernel/mutex-debug.c.
11 */
12
13/*
14 * This must be called with lock->wait_lock held.
15 */
16extern void
17debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner);
18
19static inline void debug_mutex_clear_owner(struct mutex *lock)
20{
21	lock->owner = NULL;
22}
23
24extern void debug_mutex_lock_common(struct mutex *lock,
25				    struct mutex_waiter *waiter);
26extern void debug_mutex_wake_waiter(struct mutex *lock,
27				    struct mutex_waiter *waiter);
28extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
29extern void debug_mutex_add_waiter(struct mutex *lock,
30				   struct mutex_waiter *waiter,
31				   struct thread_info *ti);
32extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
33				struct thread_info *ti);
34extern void debug_mutex_unlock(struct mutex *lock);
35extern void debug_mutex_init(struct mutex *lock, const char *name,
36			     struct lock_class_key *key);
37
38#define spin_lock_mutex(lock, flags)			\
39	do {						\
40		struct mutex *l = container_of(lock, struct mutex, wait_lock); \
41							\
42		DEBUG_LOCKS_WARN_ON(in_interrupt());	\
43		local_irq_save(flags);			\
44		__raw_spin_lock(&(lock)->raw_lock);	\
45		DEBUG_LOCKS_WARN_ON(l->magic != l);	\
46	} while (0)
47
48#define spin_unlock_mutex(lock, flags)			\
49	do {						\
50		__raw_spin_unlock(&(lock)->raw_lock);	\
51		local_irq_restore(flags);		\
52		preempt_check_resched();		\
53	} while (0)
54