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55 lines
1.7 KiB
55 lines
1.7 KiB
/* |
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* Mutexes: blocking mutual exclusion locks |
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* |
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* started by Ingo Molnar: |
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* |
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* Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <[email protected]> |
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* |
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* This file contains mutex debugging related internal declarations, |
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* prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case. |
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* More details are in kernel/mutex-debug.c. |
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*/ |
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/* |
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* This must be called with lock->wait_lock held. |
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*/ |
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extern void debug_mutex_lock_common(struct mutex *lock, |
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struct mutex_waiter *waiter); |
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extern void debug_mutex_wake_waiter(struct mutex *lock, |
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struct mutex_waiter *waiter); |
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extern void debug_mutex_free_waiter(struct mutex_waiter *waiter); |
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extern void debug_mutex_add_waiter(struct mutex *lock, |
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struct mutex_waiter *waiter, |
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struct task_struct *task); |
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extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter, |
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struct task_struct *task); |
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extern void debug_mutex_unlock(struct mutex *lock); |
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extern void debug_mutex_init(struct mutex *lock, const char *name, |
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struct lock_class_key *key); |
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static inline void mutex_set_owner(struct mutex *lock) |
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{ |
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WRITE_ONCE(lock->owner, current); |
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} |
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static inline void mutex_clear_owner(struct mutex *lock) |
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{ |
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WRITE_ONCE(lock->owner, NULL); |
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} |
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#define spin_lock_mutex(lock, flags) \ |
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do { \ |
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struct mutex *l = container_of(lock, struct mutex, wait_lock); \ |
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\ |
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DEBUG_LOCKS_WARN_ON(in_interrupt()); \ |
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local_irq_save(flags); \ |
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arch_spin_lock(&(lock)->rlock.raw_lock);\ |
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DEBUG_LOCKS_WARN_ON(l->magic != l); \ |
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} while (0) |
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#define spin_unlock_mutex(lock, flags) \ |
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do { \ |
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arch_spin_unlock(&(lock)->rlock.raw_lock); \ |
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local_irq_restore(flags); \ |
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preempt_check_resched(); \ |
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} while (0)
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