kernel/bpf/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
   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