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 extern void __set_page_owner_migrate_reason(struct page *page, int reason);
  16
  17 static inline void reset_page_owner(struct page *page, unsigned int order)
  18 {
  19         if (static_branch_unlikely(&page_owner_inited))
  20                 __reset_page_owner(page, order);
  21 }
  22
  23 static inline void set_page_owner(struct page *page,
  24                         unsigned int order, gfp_t gfp_mask)
  25 {
  26         if (static_branch_unlikely(&page_owner_inited))
  27                 __set_page_owner(page, order, gfp_mask);
  28 }
  29
  30 static inline gfp_t get_page_owner_gfp(struct page *page)
  31 {
  32         if (static_branch_unlikely(&page_owner_inited))
  33                 return __get_page_owner_gfp(page);
  34         else
  35                 return 0;
  36 }
  37 static inline void copy_page_owner(struct page *oldpage, struct page *newpage)
  38 {
  39         if (static_branch_unlikely(&page_owner_inited))
  40                 __copy_page_owner(oldpage, newpage);
  41 }
  42 static inline void set_page_owner_migrate_reason(struct page *page, int reason)
  43 {
  44         if (static_branch_unlikely(&page_owner_inited))
  45                 __set_page_owner_migrate_reason(page, reason);
  46 }
  47 #else
  48 static inline void reset_page_owner(struct page *page, unsigned int order)
  49 {
  50 }
  51 static inline void set_page_owner(struct page *page,
  52                         unsigned int order, gfp_t gfp_mask)
  53 {
  54 }
  55 static inline gfp_t get_page_owner_gfp(struct page *page)
  56 {
  57         return 0;
  58 }
  59 static inline void copy_page_owner(struct page *oldpage, struct page *newpage)
  60 {
  61 }
  62 static inline void set_page_owner_migrate_reason(struct page *page, int reason)
  63 {
  64 }
  65 #endif /* CONFIG_PAGE_OWNER */
  66 #endif /* __LINUX_PAGE_OWNER_H */