| Joonsoo Kim | 48c96a3 | 2014-12-12 16:56:01 -0800 | [diff] [blame] | 1 | #ifndef __LINUX_PAGE_OWNER_H |
| 2 | #define __LINUX_PAGE_OWNER_H |
| 3 | |
| Vlastimil Babka | 7dd80b8 | 2016-03-15 14:56:12 -0700 | [diff] [blame] | 4 | #include <linux/jump_label.h> |
| 5 | |
| Joonsoo Kim | 48c96a3 | 2014-12-12 16:56:01 -0800 | [diff] [blame] | 6 | #ifdef CONFIG_PAGE_OWNER |
| Vlastimil Babka | 7dd80b8 | 2016-03-15 14:56:12 -0700 | [diff] [blame] | 7 | extern struct static_key_false page_owner_inited; |
| Joonsoo Kim | 48c96a3 | 2014-12-12 16:56:01 -0800 | [diff] [blame] | 8 | extern struct page_ext_operations page_owner_ops; |
| 9 | |
| 10 | extern void __reset_page_owner(struct page *page, unsigned int order); |
| 11 | extern void __set_page_owner(struct page *page, |
| 12 | unsigned int order, gfp_t gfp_mask); |
| Joonsoo Kim | e2cfc91 | 2015-07-17 16:24:18 -0700 | [diff] [blame] | 13 | extern gfp_t __get_page_owner_gfp(struct page *page); |
| Vlastimil Babka | d435edc | 2016-03-15 14:56:15 -0700 | [diff] [blame^] | 14 | extern void __copy_page_owner(struct page *oldpage, struct page *newpage); |
| Joonsoo Kim | 48c96a3 | 2014-12-12 16:56:01 -0800 | [diff] [blame] | 15 | |
| 16 | static inline void reset_page_owner(struct page *page, unsigned int order) |
| 17 | { |
| Vlastimil Babka | 7dd80b8 | 2016-03-15 14:56:12 -0700 | [diff] [blame] | 18 | if (static_branch_unlikely(&page_owner_inited)) |
| 19 | __reset_page_owner(page, order); |
| Joonsoo Kim | 48c96a3 | 2014-12-12 16:56:01 -0800 | [diff] [blame] | 20 | } |
| 21 | |
| 22 | static inline void set_page_owner(struct page *page, |
| 23 | unsigned int order, gfp_t gfp_mask) |
| 24 | { |
| Vlastimil Babka | 7dd80b8 | 2016-03-15 14:56:12 -0700 | [diff] [blame] | 25 | if (static_branch_unlikely(&page_owner_inited)) |
| 26 | __set_page_owner(page, order, gfp_mask); |
| Joonsoo Kim | 48c96a3 | 2014-12-12 16:56:01 -0800 | [diff] [blame] | 27 | } |
| Joonsoo Kim | e2cfc91 | 2015-07-17 16:24:18 -0700 | [diff] [blame] | 28 | |
| 29 | static inline gfp_t get_page_owner_gfp(struct page *page) |
| 30 | { |
| Vlastimil Babka | 7dd80b8 | 2016-03-15 14:56:12 -0700 | [diff] [blame] | 31 | if (static_branch_unlikely(&page_owner_inited)) |
| 32 | return __get_page_owner_gfp(page); |
| 33 | else |
| Joonsoo Kim | e2cfc91 | 2015-07-17 16:24:18 -0700 | [diff] [blame] | 34 | return 0; |
| Joonsoo Kim | e2cfc91 | 2015-07-17 16:24:18 -0700 | [diff] [blame] | 35 | } |
| Vlastimil Babka | d435edc | 2016-03-15 14:56:15 -0700 | [diff] [blame^] | 36 | static inline void copy_page_owner(struct page *oldpage, struct page *newpage) |
| 37 | { |
| 38 | if (static_branch_unlikely(&page_owner_inited)) |
| 39 | __copy_page_owner(oldpage, newpage); |
| 40 | } |
| Joonsoo Kim | 48c96a3 | 2014-12-12 16:56:01 -0800 | [diff] [blame] | 41 | #else |
| 42 | static inline void reset_page_owner(struct page *page, unsigned int order) |
| 43 | { |
| 44 | } |
| 45 | static inline void set_page_owner(struct page *page, |
| 46 | unsigned int order, gfp_t gfp_mask) |
| 47 | { |
| 48 | } |
| Joonsoo Kim | e2cfc91 | 2015-07-17 16:24:18 -0700 | [diff] [blame] | 49 | static inline gfp_t get_page_owner_gfp(struct page *page) |
| 50 | { |
| 51 | return 0; |
| 52 | } |
| Vlastimil Babka | d435edc | 2016-03-15 14:56:15 -0700 | [diff] [blame^] | 53 | static inline void copy_page_owner(struct page *oldpage, struct page *newpage) |
| 54 | { |
| 55 | } |
| Joonsoo Kim | 48c96a3 | 2014-12-12 16:56:01 -0800 | [diff] [blame] | 56 | #endif /* CONFIG_PAGE_OWNER */ |
| 57 | #endif /* __LINUX_PAGE_OWNER_H */ |