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
9 struct pcpu_freelist_head {
10 struct pcpu_freelist_node *first;
11 raw_spinlock_t lock;
12 };
13
14 struct pcpu_freelist {
15 struct pcpu_freelist_head __percpu *freelist;
16 struct pcpu_freelist_head extralist;
17 };
18
19 struct pcpu_freelist_node {
20 struct pcpu_freelist_node *next;
21 };
22
23 /* pcpu_freelist_* do spin_lock_irqsave. */
24 void pcpu_freelist_push(struct pcpu_freelist *, struct pcpu_freelist_node *);
25 struct pcpu_freelist_node *pcpu_freelist_pop(struct pcpu_freelist *);
26 /* __pcpu_freelist_* do spin_lock only. caller must disable irqs. */
27 void __pcpu_freelist_push(struct pcpu_freelist *, struct pcpu_freelist_node *);
28 struct pcpu_freelist_node *__pcpu_freelist_pop(struct pcpu_freelist *);
29 void pcpu_freelist_populate(struct pcpu_freelist *s, void *buf, u32 elem_size,
30 u32 nr_elems);
31 int pcpu_freelist_init(struct pcpu_freelist *);
32 void pcpu_freelist_destroy(struct pcpu_freelist *s);
33 #endif
34
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