|  | /* | 
|  | * kref.c - library routines for handling generic reference counted objects | 
|  | * | 
|  | * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> | 
|  | * Copyright (C) 2004 IBM Corp. | 
|  | * | 
|  | * based on kobject.h which was: | 
|  | * Copyright (C) 2002-2003 Patrick Mochel <mochel@osdl.org> | 
|  | * Copyright (C) 2002-2003 Open Source Development Labs | 
|  | * | 
|  | * This file is released under the GPLv2. | 
|  | * | 
|  | */ | 
|  |  | 
|  | #ifndef _KREF_H_ | 
|  | #define _KREF_H_ | 
|  |  | 
|  | #include <linux/types.h> | 
|  | #include <asm/atomic.h> | 
|  |  | 
|  | struct kref { | 
|  | atomic_t refcount; | 
|  | }; | 
|  |  | 
|  | void kref_set(struct kref *kref, int num); | 
|  | void kref_init(struct kref *kref); | 
|  | void kref_get(struct kref *kref); | 
|  | int kref_put(struct kref *kref, void (*release) (struct kref *kref)); | 
|  |  | 
|  | #endif /* _KREF_H_ */ |