[linux-2.6-block.git] / kernel / mutex-debug.h

/*
 * Mutexes: blocking mutual exclusion locks
 *
 * started by Ingo Molnar:
 *
 *  Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
 *
 * This file contains mutex debugging related internal declarations,
 * prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case.
 * More details are in kernel/mutex-debug.c.
 */

/*
 * This must be called with lock->wait_lock held.
 */
extern void
debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner);

static inline void debug_mutex_clear_owner(struct mutex *lock)
{
	lock->owner = NULL;
}

extern void debug_mutex_lock_common(struct mutex *lock,
				    struct mutex_waiter *waiter);
extern void debug_mutex_wake_waiter(struct mutex *lock,
				    struct mutex_waiter *waiter);
extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
extern void debug_mutex_add_waiter(struct mutex *lock,
				   struct mutex_waiter *waiter,
				   struct thread_info *ti);
extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
				struct thread_info *ti);
extern void debug_mutex_unlock(struct mutex *lock);
extern void debug_mutex_init(struct mutex *lock, const char *name,
			     struct lock_class_key *key);

#define spin_lock_mutex(lock, flags)			\
	do {						\
		struct mutex *l = container_of(lock, struct mutex, wait_lock); \
							\
		DEBUG_LOCKS_WARN_ON(in_interrupt());	\
		local_irq_save(flags);			\
		__raw_spin_lock(&(lock)->raw_lock);	\
		DEBUG_LOCKS_WARN_ON(l->magic != l);	\
	} while (0)

#define spin_unlock_mutex(lock, flags)			\
	do {						\
		__raw_spin_unlock(&(lock)->raw_lock);	\
		local_irq_restore(flags);		\
		preempt_check_resched();		\
	} while (0)
Commit	Line	Data
408894ee IM	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
408894ee IM	13	/*
	14	* This must be called with lock->wait_lock held.
	15	*/
9a11b49a IM	16	extern void
9a11b49a IM	17	debug_mutex_set_owner(struct mutex lock, struct thread_info new_owner);
408894ee IM	18
	19	static inline void debug_mutex_clear_owner(struct mutex *lock)
	20	{
	21	lock->owner = NULL;
	22	}
	23
9a11b49a IM	24	extern void debug_mutex_lock_common(struct mutex *lock,
9a11b49a IM	25	struct mutex_waiter *waiter);
408894ee IM	26	extern void debug_mutex_wake_waiter(struct mutex *lock,
	27	struct mutex_waiter *waiter);
	28	extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
	29	extern void debug_mutex_add_waiter(struct mutex *lock,
	30	struct mutex_waiter *waiter,
9a11b49a	31	struct thread_info *ti);
408894ee IM	32	extern void mutex_remove_waiter(struct mutex lock, struct mutex_waiter waiter,
	33	struct thread_info *ti);
	34	extern void debug_mutex_unlock(struct mutex *lock);
9a11b49a IM	35	extern void debug_mutex_init(struct mutex lock, const char name,
9a11b49a IM	36	struct lock_class_key *key);
408894ee	37
1fb00c6c	38	#define spin_lock_mutex(lock, flags) \
408894ee IM	39	do { \
	40	struct mutex *l = container_of(lock, struct mutex, wait_lock); \
	41	\
9e7f4d45	42	DEBUG_LOCKS_WARN_ON(in_interrupt()); \
9a11b49a IM	43	local_irq_save(flags); \
9a11b49a IM	44	__raw_spin_lock(&(lock)->raw_lock); \
9e7f4d45	45	DEBUG_LOCKS_WARN_ON(l->magic != l); \
408894ee IM	46	} while (0)
408894ee IM	47
1fb00c6c	48	#define spin_unlock_mutex(lock, flags) \
408894ee	49	do { \
9a11b49a IM	50	__raw_spin_unlock(&(lock)->raw_lock); \
	51	local_irq_restore(flags); \
	52	preempt_check_resched(); \
408894ee	53	} while (0)