28 extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma,
161 extern void prep_transhuge_page(struct page *page);
162 extern void free_transhuge_page(struct page *page);
164 bool can_split_huge_page(struct page *page, int *pextra_pins);
165 int split_huge_page_to_list(struct page *page, struct list_head *list);
166 static inline int split_huge_page(struct page *page)  in split_huge_page()  argument
168 	return split_huge_page_to_list(page, NULL);  in split_huge_page()
170 void deferred_split_huge_page(struct page *page);
173 		unsigned long address, bool freeze, struct page *page);
186 		bool freeze, struct page *page);
239 static inline unsigned int thp_order(struct page *page)  in thp_order()  argument
241 	VM_BUG_ON_PGFLAGS(PageTail(page), page);  in thp_order()
242 	if (PageHead(page))  in thp_order()
247 static inline int hpage_nr_pages(struct page *page)  in hpage_nr_pages()  argument
249 	if (unlikely(PageTransHuge(page)))  in hpage_nr_pages()
254 struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr,
256 struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr,
261 extern struct page *huge_zero_page;
264 static inline bool is_huge_zero_page(struct page *page)  in is_huge_zero_page()  argument
266 	return READ_ONCE(huge_zero_page) == page;  in is_huge_zero_page()
279 struct page *mm_get_huge_zero_page(struct mm_struct *mm);
282 #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot))  argument
289 static inline struct list_head *page_deferred_list(struct page *page)  in page_deferred_list()  argument
295 	return &page[2].deferred_list;  in page_deferred_list()
307 static inline unsigned int thp_order(struct page *page)  in thp_order()  argument
309 	VM_BUG_ON_PGFLAGS(PageTail(page), page);  in thp_order()
331 static inline void prep_transhuge_page(struct page *page) {}  in prep_transhuge_page()  argument
332 static inline void free_transhuge_page(struct page *page) {}  in free_transhuge_page()  argument
339 can_split_huge_page(struct page *page, int *pextra_pins)  in can_split_huge_page()  argument
345 split_huge_page_to_list(struct page *page, struct list_head *list)  in split_huge_page_to_list()  argument
349 static inline int split_huge_page(struct page *page)  in split_huge_page()  argument
353 static inline void deferred_split_huge_page(struct page *page) {}  in deferred_split_huge_page()  argument
358 		unsigned long address, bool freeze, struct page *page) {}  in __split_huge_pmd()  argument
360 		unsigned long address, bool freeze, struct page *page) {}  in split_huge_pmd_address()  argument
398 static inline bool is_huge_zero_page(struct page *page)  in is_huge_zero_page()  argument
418 static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma,  in follow_devmap_pmd()
424 static inline struct page *follow_devmap_pud(struct vm_area_struct *vma,  in follow_devmap_pud()