1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __LINUX_SWAP_CGROUP_H
 3#define __LINUX_SWAP_CGROUP_H
 4
 5#include <linux/swap.h>
 6
 7#ifdef CONFIG_MEMCG_SWAP
 8
 9extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
10					unsigned short old, unsigned short new);
11extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id,
12					 unsigned int nr_ents);
13extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
14extern int swap_cgroup_swapon(int type, unsigned long max_pages);
15extern void swap_cgroup_swapoff(int type);
16
17#else
18
19static inline
20unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id,
21				  unsigned int nr_ents)
22{
23	return 0;
24}
25
26static inline
27unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
28{
29	return 0;
30}
31
32static inline int
33swap_cgroup_swapon(int type, unsigned long max_pages)
34{
35	return 0;
36}
37
38static inline void swap_cgroup_swapoff(int type)
39{
40	return;
41}
42
43#endif /* CONFIG_MEMCG_SWAP */
44
45#endif /* __LINUX_SWAP_CGROUP_H */