10 typedef struct page *new_page_t(struct page *page, unsigned long private);
11 typedef void free_page_t(struct page *page, unsigned long private);
17  * - negative errno on page migration failure;
18  * - zero on page migration success;
23  * struct movable_operations - Driver page migration
25  * The VM calls this function to prepare the page to be moved.  The page
27  * return ``true`` if the page is movable and ``false`` if it is not
29  * page->lru field, so the driver must preserve any information which
34  * @src page.  The driver should copy the contents of the
35  * @src page to the @dst page and set up the fields of @dst page.
37  * If page migration is successful, the driver should call
39  * If the driver cannot migrate the page at the moment, it can return
47  * If migration fails on the isolated page, the VM informs the driver
48  * that the page is no longer a candidate for migration by calling
49  * this function.  The driver should put the isolated page back into
53 	bool (*isolate_page)(struct page *, isolate_mode_t);
54 	int (*migrate_page)(struct page *dst, struct page *src,
56 	void (*putback_page)(struct page *);
72 extern struct page *alloc_migration_target(struct page *page, unsigned long private);
73 extern int isolate_movable_page(struct page *page, isolate_mode_t mode);
91 static inline struct page *alloc_migration_target(struct page *page,  in alloc_migration_target()  argument
94 static inline int isolate_movable_page(struct page *page, isolate_mode_t mode)  in isolate_movable_page()  argument
106 bool PageMovable(struct page *page);
107 void __SetPageMovable(struct page *page, const struct movable_operations *ops);
108 void __ClearPageMovable(struct page *page);
110 static inline bool PageMovable(struct page *page) { return false; }  in PageMovable()  argument
111 static inline void __SetPageMovable(struct page *page,  in __SetPageMovable()  argument
115 static inline void __ClearPageMovable(struct page *page)  in __ClearPageMovable()  argument
122 	return PageMovable(&folio->page);  in folio_test_movable()
126 const struct movable_operations *page_movable_ops(struct page *page)  in page_movable_ops()  argument
128 	VM_BUG_ON(!__PageMovable(page));  in page_movable_ops()
131 		((unsigned long)page->mapping - PAGE_MAPPING_MOVABLE);  in page_movable_ops()
135 extern int migrate_misplaced_page(struct page *page,
138 static inline int migrate_misplaced_page(struct page *page,  in migrate_misplaced_page()  argument
157 static inline struct page *migrate_pfn_to_page(unsigned long mpfn)  in migrate_pfn_to_page()
193 	 * Set to the owner value also stored in page->pgmap->owner for
204 	 * Set to vmf->page if this is being called to migrate a page as part of
207 	struct page		*fault_page;