| 1 | |
| 2 | * Mutexes: blocking mutual exclusion locks
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| 3 | *
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| 4 | * started by Ingo Molnar:
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| 5 | *
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| 6 | * Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <[email protected]>
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| 7 | *
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| 8 | * This file contains mutex debugging related internal declarations,
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| 9 | * prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case.
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| 10 | * More details are in kernel/mutex-debug.c.
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| 11 |
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| 12 |
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| 13 | |
| 14 | * This must be called with lock->wait_lock held.
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| 15 |
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| 16 | extern void
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| 17 | debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner);
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| 18 |
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| 19 | static inline void debug_mutex_clear_owner(struct mutex *lock)
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| 20 | {
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| 21 | lock->owner = NULL;
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| 22 | }
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| 23 |
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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 thread_info *ti);
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| 32 | extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
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| 33 | struct thread_info *ti);
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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 |
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| 38 | #define spin_lock_mutex(lock, flags) \
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| 39 | do { \
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| 40 | struct mutex *l = container_of(lock, struct mutex, wait_lock); \
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| 41 | \
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| 42 | DEBUG_LOCKS_WARN_ON(in_interrupt()); \
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| 43 | local_irq_save(flags); \
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| 44 | __raw_spin_lock(&(lock)->raw_lock); \
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| 45 | DEBUG_LOCKS_WARN_ON(l->magic != l); \
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| 46 | } while (0)
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| 47 |
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| 48 | #define spin_unlock_mutex(lock, flags) \
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| 49 | do { \
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| 50 | __raw_spin_unlock(&(lock)->raw_lock); \
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| 51 | local_irq_restore(flags); \
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| 52 | preempt_check_resched(); \
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| 53 | } while (0)
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