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
10 DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key);
11 extern void __shuffle_free_memory(pg_data_t *pgdat);
12 extern bool shuffle_pick_tail(void);
13 static 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
20 extern void __shuffle_zone(struct zone *z);
21 static 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
28 static 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
35 static inline bool shuffle_pick_tail(void)
36 {
37 return false;
38 }
39
40 static inline void shuffle_free_memory(pg_data_t *pgdat)
41 {
42 }
43
44 static inline void shuffle_zone(struct zone *z)
45 {
46 }
47
48 static inline bool is_shuffle_order(int order)
49 {
50 return false;
51 }
52 #endif
53 #endif /* _MM_SHUFFLE_H */
54
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