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#include 

/**

 * kref_put_spinlock_irqsave - decrement refcount for object.

 * @kref: object.

 * @release: pointer to the function that will clean up the object when the

 *	     last reference to the object is released.

 *	     This pointer is required, and it is not acceptable to pass kfree

 *	     in as this function.

 * @lock: lock to take in release case

 *

 * Behaves identical to kref_put with one exception.  If the reference count

 * drops to zero, the lock will be taken atomically wrt dropping the reference

 * count.  The release function has to call spin_unlock() without _irqrestore.

 */

static inline int kref_put_spinlock_irqsave(struct kref *kref,

		void (*release)(struct kref *kref),

		spinlock_t *lock)

{

	unsigned long flags;

	WARN_ON(release == NULL);

	if (atomic_add_unless(&kref->refcount, -1, 1))

		return 0;

	spin_lock_irqsave(lock, flags);

	if (atomic_dec_and_test(&kref->refcount)) {

		release(kref);

		local_irq_restore(flags);

		return 1;

	}

	spin_unlock_irqrestore(lock, flags);

	return 0;

}