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| 2 | |
| 3 | * Mutexes: blocking mutual exclusion locks
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| 4 | *
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| 5 | * started by Ingo Molnar:
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| 6 | *
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| 7 | * Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <[email protected]>
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| 8 |
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| 9 |
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| 10 | |
| 11 | * This is the control structure for tasks blocked on mutex, which resides
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| 12 | * on the blocked task's kernel stack:
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| 13 |
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| 14 | struct mutex_waiter {
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| 15 | struct list_head list;
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| 16 | struct task_struct *task;
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| 17 | struct ww_acquire_ctx *ww_ctx;
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| 18 | #ifdef CONFIG_DEBUG_MUTEXES
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| 19 | void *magic;
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| 20 | #endif
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| 21 | };
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| 22 |
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| 23 | #ifdef CONFIG_DEBUG_MUTEXES
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| 24 | extern void debug_mutex_lock_common(struct mutex *lock,
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| 25 | struct mutex_waiter *waiter);
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| 26 | extern void debug_mutex_wake_waiter(struct mutex *lock,
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| 27 | struct mutex_waiter *waiter);
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| 28 | extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
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| 29 | extern void debug_mutex_add_waiter(struct mutex *lock,
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| 30 | struct mutex_waiter *waiter,
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| 31 | struct task_struct *task);
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| 32 | extern void debug_mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
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| 33 | struct task_struct *task);
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| 34 | extern void debug_mutex_unlock(struct mutex *lock);
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| 35 | extern void debug_mutex_init(struct mutex *lock, const char *name,
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| 36 | struct lock_class_key *key);
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| 37 | #else
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| 38 | # define debug_mutex_lock_common(lock, waiter) do { } while (0)
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| 39 | # define debug_mutex_wake_waiter(lock, waiter) do { } while (0)
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| 40 | # define debug_mutex_free_waiter(waiter) do { } while (0)
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| 41 | # define debug_mutex_add_waiter(lock, waiter, ti) do { } while (0)
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| 42 | # define debug_mutex_remove_waiter(lock, waiter, ti) do { } while (0)
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| 43 | # define debug_mutex_unlock(lock) do { } while (0)
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| 44 | # define debug_mutex_init(lock, name, key) do { } while (0)
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| 45 | #endif
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