ecf7ace9a8
Makes it possible to optimize batched multiple unrefs. Initial user will be drivers/gpu/ttm which accumulates unrefs to be processed outside of atomic code. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
30 lines
734 B
C
30 lines
734 B
C
/*
|
|
* kref.h - 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>
|
|
|
|
struct kref {
|
|
atomic_t refcount;
|
|
};
|
|
|
|
void kref_init(struct kref *kref);
|
|
void kref_get(struct kref *kref);
|
|
int kref_put(struct kref *kref, void (*release) (struct kref *kref));
|
|
int kref_sub(struct kref *kref, unsigned int count,
|
|
void (*release) (struct kref *kref));
|
|
|
|
#endif /* _KREF_H_ */
|