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Ingo Molnar408894e2006-01-09 15:59:20 -08001/*
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
Ingo Molnar408894e2006-01-09 15:59:20 -080013/*
14 * This must be called with lock->wait_lock held.
15 */
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070016extern void
17debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner);
Ingo Molnar408894e2006-01-09 15:59:20 -080018
19static inline void debug_mutex_clear_owner(struct mutex *lock)
20{
21 lock->owner = NULL;
22}
23
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070024extern void debug_mutex_lock_common(struct mutex *lock,
25 struct mutex_waiter *waiter);
Ingo Molnar408894e2006-01-09 15:59:20 -080026extern 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,
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070031 struct thread_info *ti);
Ingo Molnar408894e2006-01-09 15:59:20 -080032extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
33 struct thread_info *ti);
34extern void debug_mutex_unlock(struct mutex *lock);
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070035extern void debug_mutex_init(struct mutex *lock, const char *name,
36 struct lock_class_key *key);
Ingo Molnar408894e2006-01-09 15:59:20 -080037
Ingo Molnar1fb00c62006-06-26 00:24:31 -070038#define spin_lock_mutex(lock, flags) \
Ingo Molnar408894e2006-01-09 15:59:20 -080039 do { \
40 struct mutex *l = container_of(lock, struct mutex, wait_lock); \
41 \
Ingo Molnar9e7f4d42006-07-03 00:24:30 -070042 DEBUG_LOCKS_WARN_ON(in_interrupt()); \
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070043 local_irq_save(flags); \
44 __raw_spin_lock(&(lock)->raw_lock); \
Ingo Molnar9e7f4d42006-07-03 00:24:30 -070045 DEBUG_LOCKS_WARN_ON(l->magic != l); \
Ingo Molnar408894e2006-01-09 15:59:20 -080046 } while (0)
47
Ingo Molnar1fb00c62006-06-26 00:24:31 -070048#define spin_unlock_mutex(lock, flags) \
Ingo Molnar408894e2006-01-09 15:59:20 -080049 do { \
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070050 __raw_spin_unlock(&(lock)->raw_lock); \
51 local_irq_restore(flags); \
52 preempt_check_resched(); \
Ingo Molnar408894e2006-01-09 15:59:20 -080053 } while (0)