Root/kernel/mutex.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 prototypes, for the
9 * !CONFIG_DEBUG_MUTEXES case. Most of them are NOPs:
10 */
11
12#define spin_lock_mutex(lock, flags) \
13        do { spin_lock(lock); (void)(flags); } while (0)
14#define spin_unlock_mutex(lock, flags) \
15        do { spin_unlock(lock); (void)(flags); } while (0)
16#define mutex_remove_waiter(lock, waiter, ti) \
17        __list_del((waiter)->list.prev, (waiter)->list.next)
18
19#ifdef CONFIG_SMP
20static inline void mutex_set_owner(struct mutex *lock)
21{
22    lock->owner = current_thread_info();
23}
24
25static inline void mutex_clear_owner(struct mutex *lock)
26{
27    lock->owner = NULL;
28}
29#else
30static inline void mutex_set_owner(struct mutex *lock)
31{
32}
33
34static inline void mutex_clear_owner(struct mutex *lock)
35{
36}
37#endif
38
39#define debug_mutex_wake_waiter(lock, waiter) do { } while (0)
40#define debug_mutex_free_waiter(waiter) do { } while (0)
41#define debug_mutex_add_waiter(lock, waiter, ti) do { } while (0)
42#define debug_mutex_unlock(lock) do { } while (0)
43#define debug_mutex_init(lock, name, key) do { } while (0)
44
45static inline void
46debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
47{
48}
49

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