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Index of /FSS-BCZ/root/sys/devices/system/cpu/cpu3/node0/memory61
Index of /FSS-BCZ/root/sys/devices/system/cpu/cpu3/node0/memory61
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ƒd-·Ó¿Ú S e/* SPDX-License-Identifier: GPL-2.0-only */
/*
* kref.h - library routines for handling generic reference counted objects
*
* Copyright (C) 2004 Greg Kroah-Hartman
* Copyright (C) 2004 IBM Corp.
*
* based on kobject.h which was:
* Copyright (C) 2002-2003 Patrick Mochel
* Copyright (C) 2002-2003 Open Source Development Labs
*/
#ifndef _KREF_H_
#define _KREF_H_
#include
#include
struct kref {
refcount_t refcount;
};
#define KREF_INIT(n) { .refcount = REFCOUNT_INIT(n), }
/**
* kref_init - initialize object.
* @kref: object in question.
*/
static inline void kref_init(struct kref *kref)
{
refcount_set(&kref->refcount, 1);
}
static inline unsigned int kref_read(const struct kref *kref)
{
return refcount_read(&kref->refcount);
}
/**
* kref_get - increment refcount for object.
* @kref: object.
*/
static inline void kref_get(struct kref *kref)
{
refcount_inc(&kref->refcount);
}
/**
* kref_put - 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.
*
* Decrement the refcount, and if 0, call release().
* Return 1 if the object was removed, otherwise return 0. Beware, if this
* function returns 0, you still can not count on the kref from remaining in
* memo