| 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 |