text: #ifndef __LINUX_SPINLOCK_API_SMP_H
  #define __LINUX_SPINLOCK_API_SMP_H
  
  #ifndef __LINUX_SPINLOCK_H
  # error "please don't include this file directly"
  #endif
  
  /*
   * include/linux/spinlock_api_smp.h
   *
   * spinlock API declarations on SMP (and debug)
   * (implemented in kernel/spinlock.c)
   *
   * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
   * Released under the General Public License (GPL).
   */
  
  int in_lock_functions(unsigned long addr);
  
  #define assert_raw_spin_locked(x)	BUG_ON(!raw_spin_is_locked(x))
  
  void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)		__acquires(lock);
  void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
  								__acquires(lock);
  void __lockfunc
  _raw_spin_lock_nest_lock(raw_spinlock_t *lock, struct lockdep_map *map)
  								__acquires(lock);
  void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)		__acquires(lock);
  void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
  								__acquires(lock);
  
  unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
  								__acquires(lock);
  unsigned long __lockfunc
  _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock, int subclass)
  								__acquires(lock);
  int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock);
  int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock);
  void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)		__releases(lock);
  void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)	__releases(lock);
  void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)	__releases(lock);
  void __lockfunc
  _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
  								__releases(lock);
  
  #ifdef CONFIG_INLINE_SPIN_LOCK
  #define _raw_spin_lock(lock) __raw_spin_lock(lock)
  #endif
  
  #ifdef CONFIG_INLINE_SPIN_LOCK_BH
  #define _raw_spin_lock_bh(lock) __raw_spin_lock_bh(lock)
  #endif
  
  #ifdef CONFIG_INLINE_SPIN_LOCK_IRQ
  #define _raw_spin_lock_irq(lock) __raw_spin_lock_irq(lock)
  #endif
  
  #ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
  #define _raw_spin_lock_irqsave(lock) __raw_spin_lock_irqsave(lock)
  #endif
  
  #ifdef CONFIG_INLINE_SPIN_TRYLOCK
  #define _raw_spin_trylock(lock) __raw_spin_trylock(lock)
  #endif
  
  #ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH
  #define _raw_spin_trylock_bh(lock) __raw_spin_trylock_bh(lock)
  #endif
  
  #ifndef CONFIG_UNINLINE_SPIN_UNLOCK
  #define _raw_spin_unlock(lock) __raw_spin_unlock(lock)
  #endif
  
  #ifdef CONFIG_INLINE_SPIN_UNLOCK_BH
  #define _raw_spin_unlock_bh(lock) __raw_spin_unlock_bh(lock)
  #endif
  
  #ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ
  #define _raw_spin_unlock_irq(lock) __raw_spin_unlock_irq(lock)
  #endif
  
  #ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
  #define _raw_spin_unlock_irqrestore(lock, flags) __raw_spin_unlock_irqrestore(lock, flags)
  #endif
  
  static inline int __raw_spin_trylock(raw_spinlock_t *lock)
  {
  	preempt_disable();
  	if (do_raw_spin_trylock(lock)) {
  		spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
  		return 1;
  	}
  	preempt_enable();
  	return 0;
  }
  
  /*
   * If lockdep is enabled then we use the non-preemption spin-ops
   * even on CONFIG_PREEMPTION, because lockdep assumes that interrupts are
   * not re-enabled during lock-acquire (which the preempt-spin-ops do):
   */
  #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
  
  static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock)
  {
  	unsigned long flags;
  
  	local_irq_save(flags);
  	preempt_disable();
  	spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
  	/*
  	 * On lockdep we dont want the hand-coded irq-enable of
  	 * do_raw_spin_lock_flags() code, because lockdep assumes
  	 * that interrupts are not re-enabled during lock-acquire:
  	 */
  #ifdef CONFIG_LOCKDEP
  	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
  #else
  	do_raw_spin_lock_flags(lock, &flags);
  #endif
  	return flags;
  }
  
  static inline void __raw_spin_lock_irq(raw_spinlock_t *lock)
  {
  	local_irq_disable();
  	preempt_disable();
  	spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
  	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
  }
  
  static inline void __raw_spin_lock_bh(raw_spinlock_t *lock)
  {
  	__local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
  	spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
  	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
  }
  
  static inline void __raw_spin_lock(raw_spinlock_t *lock)
  {
  	preempt_disable();
  	spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
  	LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
  }
  
  #endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_DEBUG_LOCK_ALLOC */
  
  static inline void __raw_spin_unlock(raw_spinlock_t *lock)
  {
  	spin_release(&lock->dep_map, 1, _RET_IP_);
  	do_raw_spin_unlock(lock);
  	preempt_enable();
  }
  
  static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
  					    unsigned long flags)
  {
  	spin_release(&lock->dep_map, 1, _RET_IP_);
  	do_raw_spin_unlock(lock);
  	local_irq_restore(flags);
  	preempt_enable();
  }
  
  static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)
  {
  	spin_release(&lock->dep_map, 1, _RET_IP_);
  	do_raw_spin_unlock(lock);
  	local_irq_enable();
  	preempt_enable();
  }
  
  static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock)
  {
  	spin_release(&lock->dep_map, 1, _RET_IP_);
  	do_raw_spin_unlock(lock);
  	__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
  }
  
  static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock)
  {
  	__local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
  	if (do_raw_spin_trylock(lock)) {
  		spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
  		return 1;
  	}
  	__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
  	return 0;
  }
  
  #include <linux/rwlock_api_smp.h>
  
  #endif /* __LINUX_SPINLOCK_API_SMP_H */
  