percpu_freelist.h 1.1 KB

123456789101112131415161718192021222324252627282930313233
  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. struct pcpu_freelist_head {
  9. struct pcpu_freelist_node *first;
  10. raw_spinlock_t lock;
  11. };
  12. struct pcpu_freelist {
  13. struct pcpu_freelist_head __percpu *freelist;
  14. struct pcpu_freelist_head extralist;
  15. };
  16. struct pcpu_freelist_node {
  17. struct pcpu_freelist_node *next;
  18. };
  19. /* pcpu_freelist_* do spin_lock_irqsave. */
  20. void pcpu_freelist_push(struct pcpu_freelist *, struct pcpu_freelist_node *);
  21. struct pcpu_freelist_node *pcpu_freelist_pop(struct pcpu_freelist *);
  22. /* __pcpu_freelist_* do spin_lock only. caller must disable irqs. */
  23. void __pcpu_freelist_push(struct pcpu_freelist *, struct pcpu_freelist_node *);
  24. struct pcpu_freelist_node *__pcpu_freelist_pop(struct pcpu_freelist *);
  25. void pcpu_freelist_populate(struct pcpu_freelist *s, void *buf, u32 elem_size,
  26. u32 nr_elems);
  27. int pcpu_freelist_init(struct pcpu_freelist *);
  28. void pcpu_freelist_destroy(struct pcpu_freelist *s);
  29. #endif