1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_PAGE_PINNER_H 3 #define __LINUX_PAGE_PINNER_H 4 5 #include <linux/jump_label.h> 6 7 #ifdef CONFIG_PAGE_PINNER 8 extern struct static_key_false page_pinner_inited; 9 extern struct static_key_true failure_tracking; 10 extern struct page_ext_operations page_pinner_ops; 11 12 extern void __free_page_pinner(struct page *page, unsigned int order); 13 void __page_pinner_failure_detect(struct page *page); 14 void __page_pinner_put_page(struct page *page); 15 free_page_pinner(struct page * page,unsigned int order)16static inline void free_page_pinner(struct page *page, unsigned int order) 17 { 18 if (static_branch_unlikely(&page_pinner_inited)) 19 __free_page_pinner(page, order); 20 } 21 page_pinner_put_page(struct page * page)22static inline void page_pinner_put_page(struct page *page) 23 { 24 if (!static_branch_unlikely(&page_pinner_inited)) 25 return; 26 27 __page_pinner_put_page(page); 28 } 29 page_pinner_failure_detect(struct page * page)30static inline void page_pinner_failure_detect(struct page *page) 31 { 32 if (!static_branch_unlikely(&page_pinner_inited)) 33 return; 34 35 __page_pinner_failure_detect(page); 36 } 37 #else free_page_pinner(struct page * page,unsigned int order)38static inline void free_page_pinner(struct page *page, unsigned int order) 39 { 40 } page_pinner_put_page(struct page * page)41static inline void page_pinner_put_page(struct page *page) 42 { 43 } page_pinner_failure_detect(struct page * page)44static inline void page_pinner_failure_detect(struct page *page) 45 { 46 } 47 #endif /* CONFIG_PAGE_PINNER */ 48 #endif /* __LINUX_PAGE_PINNER_H */ 49