xref: /OK3568_Linux_fs/kernel/mm/shuffle.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun // Copyright(c) 2018 Intel Corporation. All rights reserved.
3*4882a593Smuzhiyun #ifndef _MM_SHUFFLE_H
4*4882a593Smuzhiyun #define _MM_SHUFFLE_H
5*4882a593Smuzhiyun #include <linux/jump_label.h>
6*4882a593Smuzhiyun 
7*4882a593Smuzhiyun #define SHUFFLE_ORDER (MAX_ORDER-1)
8*4882a593Smuzhiyun 
9*4882a593Smuzhiyun #ifdef CONFIG_SHUFFLE_PAGE_ALLOCATOR
10*4882a593Smuzhiyun DECLARE_STATIC_KEY_FALSE(page_alloc_shuffle_key);
11*4882a593Smuzhiyun extern void __shuffle_free_memory(pg_data_t *pgdat);
12*4882a593Smuzhiyun extern bool shuffle_pick_tail(void);
shuffle_free_memory(pg_data_t * pgdat)13*4882a593Smuzhiyun static inline void shuffle_free_memory(pg_data_t *pgdat)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun 	if (!static_branch_unlikely(&page_alloc_shuffle_key))
16*4882a593Smuzhiyun 		return;
17*4882a593Smuzhiyun 	__shuffle_free_memory(pgdat);
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun 
20*4882a593Smuzhiyun extern void __shuffle_zone(struct zone *z);
shuffle_zone(struct zone * z)21*4882a593Smuzhiyun static inline void shuffle_zone(struct zone *z)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun 	if (!static_branch_unlikely(&page_alloc_shuffle_key))
24*4882a593Smuzhiyun 		return;
25*4882a593Smuzhiyun 	__shuffle_zone(z);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun 
is_shuffle_order(int order)28*4882a593Smuzhiyun static inline bool is_shuffle_order(int order)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun 	if (!static_branch_unlikely(&page_alloc_shuffle_key))
31*4882a593Smuzhiyun 		return false;
32*4882a593Smuzhiyun 	return order >= SHUFFLE_ORDER;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun #else
shuffle_pick_tail(void)35*4882a593Smuzhiyun static inline bool shuffle_pick_tail(void)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun 	return false;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun 
shuffle_free_memory(pg_data_t * pgdat)40*4882a593Smuzhiyun static inline void shuffle_free_memory(pg_data_t *pgdat)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun 
shuffle_zone(struct zone * z)44*4882a593Smuzhiyun static inline void shuffle_zone(struct zone *z)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun 
is_shuffle_order(int order)48*4882a593Smuzhiyun static inline bool is_shuffle_order(int order)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun 	return false;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun #endif
53*4882a593Smuzhiyun #endif /* _MM_SHUFFLE_H */
54