Root/kernel/mutex-debug.h

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 debug_mutex_lock_common(struct mutex *lock,
17                    struct mutex_waiter *waiter);
18extern 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,
23                   struct thread_info *ti);
24extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
25                struct thread_info *ti);
26extern void debug_mutex_unlock(struct mutex *lock);
27extern void debug_mutex_init(struct mutex *lock, const char *name,
28                 struct lock_class_key *key);
29
30static inline void mutex_set_owner(struct mutex *lock)
31{
32    lock->owner = current;
33}
34
35static 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)
56

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