28 struct page *follow_trans_huge_pmd(struct vm_area_struct *vma,
48  * @pgprot: page protection to use
67  * @pgprot: page protection to use
187 void prep_transhuge_page(struct page *page);
188 void free_transhuge_page(struct page *page);
189 bool is_transparent_hugepage(struct page *page);
191 bool can_split_huge_page(struct page *page, int *pextra_pins);
192 int split_huge_page_to_list(struct page *page, struct list_head *list);
193 static inline int split_huge_page(struct page *page)  in split_huge_page()  argument
195 	return split_huge_page_to_list(page, NULL);  in split_huge_page()
197 void deferred_split_huge_page(struct page *page);
200 		unsigned long address, bool freeze, struct page *page);
213 		bool freeze, struct page *page);
257  * thp_head - Head page of a transparent huge page.
258  * @page: Any page (tail, head or regular) found in the page cache.
260 static inline struct page *thp_head(struct page *page)  in thp_head()  argument
262 	return compound_head(page);  in thp_head()
266  * thp_order - Order of a transparent huge page.
267  * @page: Head page of a transparent huge page.
269 static inline unsigned int thp_order(struct page *page)  in thp_order()  argument
271 	VM_BUG_ON_PGFLAGS(PageTail(page), page);  in thp_order()
272 	if (PageHead(page))  in thp_order()
278  * thp_nr_pages - The number of regular pages in this huge page.
279  * @page: The head page of a huge page.
281 static inline int thp_nr_pages(struct page *page)  in thp_nr_pages()  argument
283 	VM_BUG_ON_PGFLAGS(PageTail(page), page);  in thp_nr_pages()
284 	if (PageHead(page))  in thp_nr_pages()
289 struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr,
291 struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr,
296 extern struct page *huge_zero_page;
299 static inline bool is_huge_zero_page(struct page *page)  in is_huge_zero_page()  argument
301 	return READ_ONCE(huge_zero_page) == page;  in is_huge_zero_page()
314 struct page *mm_get_huge_zero_page(struct mm_struct *mm);
317 #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot))  argument
324 static inline struct list_head *page_deferred_list(struct page *page)  in page_deferred_list()  argument
330 	return &page[2].deferred_list;  in page_deferred_list()
342 static inline struct page *thp_head(struct page *page)  in thp_head()  argument
344 	VM_BUG_ON_PGFLAGS(PageTail(page), page);  in thp_head()
345 	return page;  in thp_head()
348 static inline unsigned int thp_order(struct page *page)  in thp_order()  argument
350 	VM_BUG_ON_PGFLAGS(PageTail(page), page);  in thp_order()
354 static inline int thp_nr_pages(struct page *page)  in thp_nr_pages()  argument
356 	VM_BUG_ON_PGFLAGS(PageTail(page), page);  in thp_nr_pages()
382 static inline void prep_transhuge_page(struct page *page) {}  in prep_transhuge_page()  argument
384 static inline bool is_transparent_hugepage(struct page *page)  in is_transparent_hugepage()  argument
394 can_split_huge_page(struct page *page, int *pextra_pins)  in can_split_huge_page()  argument
400 split_huge_page_to_list(struct page *page, struct list_head *list)  in split_huge_page_to_list()  argument
404 static inline int split_huge_page(struct page *page)  in split_huge_page()  argument
408 static inline void deferred_split_huge_page(struct page *page) {}  in deferred_split_huge_page()  argument
413 		unsigned long address, bool freeze, struct page *page) {}  in __split_huge_pmd()  argument
415 		unsigned long address, bool freeze, struct page *page) {}  in split_huge_pmd_address()  argument
453 static inline bool is_huge_zero_page(struct page *page)  in is_huge_zero_page()  argument
473 static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma,  in follow_devmap_pmd()
479 static inline struct page *follow_devmap_pud(struct vm_area_struct *vma,  in follow_devmap_pud()
492  * thp_size - Size of a transparent huge page.
493  * @page: Head page of a transparent huge page.
495  * Return: Number of bytes in this page.
497 static inline unsigned long thp_size(struct page *page)  in thp_size()  argument
499 	return PAGE_SIZE << thp_order(page);  in thp_size()