1 #ifndef __LINUX_PAGE_OWNER_H 2 #define __LINUX_PAGE_OWNER_H 3 4 #include <linux/jump_label.h> 5 6 #ifdef CONFIG_PAGE_OWNER 7 extern struct static_key_false page_owner_inited; 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); 13 extern gfp_t __get_page_owner_gfp(struct page *page); 14 extern void __copy_page_owner(struct page *oldpage, struct page *newpage); 15 extern void __set_page_owner_migrate_reason(struct page *page, int reason); 16 extern void __dump_page_owner(struct page *page); 17 18 static inline void reset_page_owner(struct page *page, unsigned int order) 19 { 20 if (static_branch_unlikely(&page_owner_inited)) 21 __reset_page_owner(page, order); 22 } 23 24 static inline void set_page_owner(struct page *page, 25 unsigned int order, gfp_t gfp_mask) 26 { 27 if (static_branch_unlikely(&page_owner_inited)) 28 __set_page_owner(page, order, gfp_mask); 29 } 30 31 static inline gfp_t get_page_owner_gfp(struct page *page) 32 { 33 if (static_branch_unlikely(&page_owner_inited)) 34 return __get_page_owner_gfp(page); 35 else 36 return 0; 37 } 38 static inline void copy_page_owner(struct page *oldpage, struct page *newpage) 39 { 40 if (static_branch_unlikely(&page_owner_inited)) 41 __copy_page_owner(oldpage, newpage); 42 } 43 static inline void set_page_owner_migrate_reason(struct page *page, int reason) 44 { 45 if (static_branch_unlikely(&page_owner_inited)) 46 __set_page_owner_migrate_reason(page, reason); 47 } 48 static inline void dump_page_owner(struct page *page) 49 { 50 if (static_branch_unlikely(&page_owner_inited)) 51 __dump_page_owner(page); 52 } 53 #else 54 static inline void reset_page_owner(struct page *page, unsigned int order) 55 { 56 } 57 static inline void set_page_owner(struct page *page, 58 unsigned int order, gfp_t gfp_mask) 59 { 60 } 61 static inline gfp_t get_page_owner_gfp(struct page *page) 62 { 63 return 0; 64 } 65 static inline void copy_page_owner(struct page *oldpage, struct page *newpage) 66 { 67 } 68 static inline void set_page_owner_migrate_reason(struct page *page, int reason) 69 { 70 } 71 static inline void dump_page_owner(struct page *page) 72 { 73 } 74 #endif /* CONFIG_PAGE_OWNER */ 75 #endif /* __LINUX_PAGE_OWNER_H */ 76