percpu_freelist.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/* Copyright (c) 2016 Facebook
 3 */
 4#ifndef __PERCPU_FREELIST_H__
 5#define __PERCPU_FREELIST_H__
 6#include <linux/spinlock.h>
 7#include <linux/percpu.h>
 8#include <asm/rqspinlock.h>
 9
10struct pcpu_freelist_head {
11	struct pcpu_freelist_node *first;
12	rqspinlock_t lock;
13};
14
15struct pcpu_freelist {
16	struct pcpu_freelist_head __percpu *freelist;
17};
18
19struct pcpu_freelist_node {
20	struct pcpu_freelist_node *next;
21};
22
23/* pcpu_freelist_* do spin_lock_irqsave. */
24void pcpu_freelist_push(struct pcpu_freelist *, struct pcpu_freelist_node *);
25struct pcpu_freelist_node *pcpu_freelist_pop(struct pcpu_freelist *);
26/* __pcpu_freelist_* do spin_lock only. caller must disable irqs. */
27void __pcpu_freelist_push(struct pcpu_freelist *, struct pcpu_freelist_node *);
28struct pcpu_freelist_node *__pcpu_freelist_pop(struct pcpu_freelist *);
29void pcpu_freelist_populate(struct pcpu_freelist *s, void *buf, u32 elem_size,
30			    u32 nr_elems);
31int pcpu_freelist_init(struct pcpu_freelist *);
32void pcpu_freelist_destroy(struct pcpu_freelist *s);
33#endif