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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 debug_mutex_lock_common(struct mutex *lock,
17 struct mutex_waiter *waiter);
Ingo Molnar408894e2006-01-09 15:59:20 -080018extern void debug_mutex_wake_waiter(struct mutex *lock,
19 struct mutex_waiter *waiter);
20extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
21extern void debug_mutex_add_waiter(struct mutex *lock,
22 struct mutex_waiter *waiter,
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070023 struct thread_info *ti);
Ingo Molnar408894e2006-01-09 15:59:20 -080024extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
25 struct thread_info *ti);
26extern void debug_mutex_unlock(struct mutex *lock);
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070027extern void debug_mutex_init(struct mutex *lock, const char *name,
28 struct lock_class_key *key);
Ingo Molnar408894e2006-01-09 15:59:20 -080029
Peter Zijlstra0d66bf62009-01-12 14:01:47 +010030static inline void mutex_set_owner(struct mutex *lock)
31{
32 lock->owner = current_thread_info();
33}
34
35static inline void mutex_clear_owner(struct mutex *lock)
36{
37 lock->owner = NULL;
38}
39
Ingo Molnar1fb00c62006-06-26 00:24:31 -070040#define spin_lock_mutex(lock, flags) \
Ingo Molnar408894e2006-01-09 15:59:20 -080041 do { \
42 struct mutex *l = container_of(lock, struct mutex, wait_lock); \
43 \
Ingo Molnar9e7f4d42006-07-03 00:24:30 -070044 DEBUG_LOCKS_WARN_ON(in_interrupt()); \
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070045 local_irq_save(flags); \
46 __raw_spin_lock(&(lock)->raw_lock); \
Ingo Molnar9e7f4d42006-07-03 00:24:30 -070047 DEBUG_LOCKS_WARN_ON(l->magic != l); \
Ingo Molnar408894e2006-01-09 15:59:20 -080048 } while (0)
49
Ingo Molnar1fb00c62006-06-26 00:24:31 -070050#define spin_unlock_mutex(lock, flags) \
Ingo Molnar408894e2006-01-09 15:59:20 -080051 do { \
Ingo Molnar9a11b49a2006-07-03 00:24:33 -070052 __raw_spin_unlock(&(lock)->raw_lock); \
53 local_irq_restore(flags); \
54 preempt_check_resched(); \
Ingo Molnar408894e2006-01-09 15:59:20 -080055 } while (0)