linux-stable/include/linux/klist.h
Thomas Gleixner e311edbc45 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 244
Based on 1 normalized pattern(s):

  this file is rleased under the gpl v2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Enrico Weigelt <info@metux.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190602204654.725819457@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:08 +02:00

67 lines
1.9 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* klist.h - Some generic list helpers, extending struct list_head a bit.
*
* Implementations are found in lib/klist.c
*
* Copyright (C) 2005 Patrick Mochel
*/
#ifndef _LINUX_KLIST_H
#define _LINUX_KLIST_H
#include <linux/spinlock.h>
#include <linux/kref.h>
#include <linux/list.h>
struct klist_node;
struct klist {
spinlock_t k_lock;
struct list_head k_list;
void (*get)(struct klist_node *);
void (*put)(struct klist_node *);
} __attribute__ ((aligned (sizeof(void *))));
#define KLIST_INIT(_name, _get, _put) \
{ .k_lock = __SPIN_LOCK_UNLOCKED(_name.k_lock), \
.k_list = LIST_HEAD_INIT(_name.k_list), \
.get = _get, \
.put = _put, }
#define DEFINE_KLIST(_name, _get, _put) \
struct klist _name = KLIST_INIT(_name, _get, _put)
extern void klist_init(struct klist *k, void (*get)(struct klist_node *),
void (*put)(struct klist_node *));
struct klist_node {
void *n_klist; /* never access directly */
struct list_head n_node;
struct kref n_ref;
};
extern void klist_add_tail(struct klist_node *n, struct klist *k);
extern void klist_add_head(struct klist_node *n, struct klist *k);
extern void klist_add_behind(struct klist_node *n, struct klist_node *pos);
extern void klist_add_before(struct klist_node *n, struct klist_node *pos);
extern void klist_del(struct klist_node *n);
extern void klist_remove(struct klist_node *n);
extern int klist_node_attached(struct klist_node *n);
struct klist_iter {
struct klist *i_klist;
struct klist_node *i_cur;
};
extern void klist_iter_init(struct klist *k, struct klist_iter *i);
extern void klist_iter_init_node(struct klist *k, struct klist_iter *i,
struct klist_node *n);
extern void klist_iter_exit(struct klist_iter *i);
extern struct klist_node *klist_prev(struct klist_iter *i);
extern struct klist_node *klist_next(struct klist_iter *i);
#endif