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kernel add
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#ifndef __LINUX_PAGE_OWNER_H
#define __LINUX_PAGE_OWNER_H
#ifdef CONFIG_PAGE_OWNER
extern bool page_owner_inited;
extern struct page_ext_operations page_owner_ops;
extern void __reset_page_owner(struct page *page, unsigned int order);
extern void __set_page_owner(struct page *page,
unsigned int order, gfp_t gfp_mask);
extern gfp_t __get_page_owner_gfp(struct page *page);
static inline void reset_page_owner(struct page *page, unsigned int order)
{
if (likely(!page_owner_inited))
return;
__reset_page_owner(page, order);
}
static inline void set_page_owner(struct page *page,
unsigned int order, gfp_t gfp_mask)
{
if (likely(!page_owner_inited))
return;
__set_page_owner(page, order, gfp_mask);
}
static inline gfp_t get_page_owner_gfp(struct page *page)
{
if (likely(!page_owner_inited))
return 0;
return __get_page_owner_gfp(page);
}
#else
static inline void reset_page_owner(struct page *page, unsigned int order)
{
}
static inline void set_page_owner(struct page *page,
unsigned int order, gfp_t gfp_mask)
{
}
static inline gfp_t get_page_owner_gfp(struct page *page)
{
return 0;
}
#endif /* CONFIG_PAGE_OWNER */
#endif /* __LINUX_PAGE_OWNER_H */
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