include/linux/page_owner.h

   1 #ifndef __LINUX_PAGE_OWNER_H
   2 #define __LINUX_PAGE_OWNER_H
   3
   4 #ifdef CONFIG_PAGE_OWNER
   5 extern bool page_owner_inited;
   6 extern struct page_ext_operations page_owner_ops;
   7
   8 extern void __reset_page_owner(struct page *page, unsigned int order);
   9 extern void __set_page_owner(struct page *page,
  10                         unsigned int order, gfp_t gfp_mask);
  11 extern gfp_t __get_page_owner_gfp(struct page *page);
  12
  13 static inline void reset_page_owner(struct page *page, unsigned int order)
  14 {
  15         if (likely(!page_owner_inited))
  16                 return;
  17
  18         __reset_page_owner(page, order);
  19 }
  20
  21 static inline void set_page_owner(struct page *page,
  22                         unsigned int order, gfp_t gfp_mask)
  23 {
  24         if (likely(!page_owner_inited))
  25                 return;
  26
  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 (likely(!page_owner_inited))
  33                 return 0;
  34
  35         return __get_page_owner_gfp(page);
  36 }
  37 #else
  38 static inline void reset_page_owner(struct page *page, unsigned int order)
  39 {
  40 }
  41 static inline void set_page_owner(struct page *page,
  42                         unsigned int order, gfp_t gfp_mask)
  43 {
  44 }
  45 static inline gfp_t get_page_owner_gfp(struct page *page)
  46 {
  47         return 0;
  48 }
  49
  50 #endif /* CONFIG_PAGE_OWNER */
  51 #endif /* __LINUX_PAGE_OWNER_H */