include/linux/page_owner.h

   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
  16 static inline void reset_page_owner(struct page *page, unsigned int order)
  17 {
  18         if (static_branch_unlikely(&page_owner_inited))
  19                 __reset_page_owner(page, order);
  20 }
  21
  22 static inline void set_page_owner(struct page *page,
  23                         unsigned int order, gfp_t gfp_mask)
  24 {
  25         if (static_branch_unlikely(&page_owner_inited))
  26                 __set_page_owner(page, order, gfp_mask);
  27 }
  28
  29 static inline gfp_t get_page_owner_gfp(struct page *page)
  30 {
  31         if (static_branch_unlikely(&page_owner_inited))
  32                 return __get_page_owner_gfp(page);
  33         else
  34                 return 0;
  35 }
  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 }
  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 }
  49 static inline gfp_t get_page_owner_gfp(struct page *page)
  50 {
  51         return 0;
  52 }
  53 static inline void copy_page_owner(struct page *oldpage, struct page *newpage)
  54 {
  55 }
  56 #endif /* CONFIG_PAGE_OWNER */
  57 #endif /* __LINUX_PAGE_OWNER_H */