/*
   * 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_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);

  static inline void mutex_set_owner(struct mutex *lock)
  {

  	lock->owner = current;

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

  #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);			\

  		arch_spin_lock(&(lock)->rlock.raw_lock);\

  		DEBUG_LOCKS_WARN_ON(l->magic != l);	\

  	} while (0)

  #define spin_unlock_mutex(lock, flags)				\
  	do {							\
  		arch_spin_unlock(&(lock)->rlock.raw_lock);	\
  		local_irq_restore(flags);			\
  		preempt_check_resched();			\

  	} while (0)