extern int putback_lru_pages(struct list_head *l);
extern int migrate_pages(struct list_head *l, struct list_head *t,
struct list_head *moved, struct list_head *failed);
+#else
+static inline int isolate_lru_page(struct page *p) { return -ENOSYS; }
+static inline int putback_lru_pages(struct list_head *l) { return 0; }
+static inline int migrate_pages(struct list_head *l, struct list_head *t,
+ struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
#endif
#ifdef CONFIG_MMU