1// SPDX-License-Identifier: GPL-2.0
2// Copyright(c) 2018 Intel Corporation. All rights reserved.
3#ifndef _MM_SHUFFLE_H
4#define _MM_SHUFFLE_H
5#include <linux/jump_label.h>
6
7#define SHUFFLE_ORDER MAX_PAGE_ORDER
8
9#ifdef CONFIG_SHUFFLE_PAGE_ALLOCATOR
10DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key);
11extern void __shuffle_free_memory(pg_data_t *pgdat);
12extern bool shuffle_pick_tail(void);
13static inline void __meminit shuffle_free_memory(pg_data_t *pgdat)
14{
15	if (!static_branch_unlikely(&page_alloc_shuffle_key))
16		return;
17	__shuffle_free_memory(pgdat);
18}
19
20extern void __shuffle_zone(struct zone *z);
21static inline void __meminit shuffle_zone(struct zone *z)
22{
23	if (!static_branch_unlikely(&page_alloc_shuffle_key))
24		return;
25	__shuffle_zone(z);
26}
27
28static inline bool is_shuffle_order(int order)
29{
30	if (!static_branch_unlikely(&page_alloc_shuffle_key))
31		return false;
32	return order >= SHUFFLE_ORDER;
33}
34#else
35static inline bool shuffle_pick_tail(void)
36{
37	return false;
38}
39
40static inline void shuffle_free_memory(pg_data_t *pgdat)
41{
42}
43
44static inline void shuffle_zone(struct zone *z)
45{
46}
47
48static inline bool is_shuffle_order(int order)
49{
50	return false;
51}
52#endif
53#endif /* _MM_SHUFFLE_H */
54