Linux Kernel  3.7.1
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mutex-debug.h
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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 <[email protected]>
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  */
16 extern void debug_mutex_lock_common(struct mutex *lock,
17  struct mutex_waiter *waiter);
18 extern void debug_mutex_wake_waiter(struct mutex *lock,
19  struct mutex_waiter *waiter);
20 extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
21 extern void debug_mutex_add_waiter(struct mutex *lock,
22  struct mutex_waiter *waiter,
23  struct thread_info *ti);
24 extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
25  struct thread_info *ti);
26 extern void debug_mutex_unlock(struct mutex *lock);
27 extern void debug_mutex_init(struct mutex *lock, const char *name,
28  struct lock_class_key *key);
29 
30 static inline void mutex_set_owner(struct mutex *lock)
31 {
32  lock->owner = current;
33 }
34 
35 static inline void mutex_clear_owner(struct mutex *lock)
36 {
37  lock->owner = NULL;
38 }
39 
40 #define spin_lock_mutex(lock, flags) \
41  do { \
42  struct mutex *l = container_of(lock, struct mutex, wait_lock); \
43  \
44  DEBUG_LOCKS_WARN_ON(in_interrupt()); \
45  local_irq_save(flags); \
46  arch_spin_lock(&(lock)->rlock.raw_lock);\
47  DEBUG_LOCKS_WARN_ON(l->magic != l); \
48  } while (0)
49 
50 #define spin_unlock_mutex(lock, flags) \
51  do { \
52  arch_spin_unlock(&(lock)->rlock.raw_lock); \
53  local_irq_restore(flags); \
54  preempt_check_resched(); \
55  } while (0)