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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 <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 | */ | |
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_thread_info(); | |
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 | __raw_spin_lock(&(lock)->raw_lock); \ | |
47 | DEBUG_LOCKS_WARN_ON(l->magic != l); \ | |
48 | } while (0) | |
49 | ||
50 | #define spin_unlock_mutex(lock, flags) \ | |
51 | do { \ | |
52 | __raw_spin_unlock(&(lock)->raw_lock); \ | |
53 | local_irq_restore(flags); \ | |
54 | preempt_check_resched(); \ | |
55 | } while (0) |