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 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 */