1 files changed, 67 insertions, 0 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
new file mode 100644
index 00000000..855c337b
--- /dev/null
+++ b/include/linux/migrate.h
@@ -0,0 +1,67 @@
+#ifndef _LINUX_MIGRATE_H
+#define _LINUX_MIGRATE_H
+
+#include <linux/mm.h>
+#include <linux/mempolicy.h>
+#include <linux/migrate_mode.h>
+
+typedef struct page *new_page_t(struct page *, unsigned long private, int **);
+
+#ifdef CONFIG_MIGRATION
+
+extern void putback_lru_pages(struct list_head *l);
+extern int migrate_page(struct address_space *,
+			struct page *, struct page *, enum migrate_mode);
+extern int migrate_pages(struct list_head *l, new_page_t x,
+			unsigned long private, bool offlining,
+			enum migrate_mode mode);
+extern int migrate_huge_pages(struct list_head *l, new_page_t x,
+			unsigned long private, bool offlining,
+			enum migrate_mode mode);
+
+extern int fail_migrate_page(struct address_space *,
+			struct page *, struct page *);
+
+extern int migrate_prep(void);
+extern int migrate_prep_local(void);
+extern int migrate_vmas(struct mm_struct *mm,
+		const nodemask_t *from, const nodemask_t *to,
+		unsigned long flags);
+extern void migrate_page_copy(struct page *newpage, struct page *page);
+extern int migrate_huge_page_move_mapping(struct address_space *mapping,
+				  struct page *newpage, struct page *page);
+#else
+
+static inline void putback_lru_pages(struct list_head *l) {}
+static inline int migrate_pages(struct list_head *l, new_page_t x,
+		unsigned long private, bool offlining,
+		enum migrate_mode mode) { return -ENOSYS; }
+static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
+		unsigned long private, bool offlining,
+		enum migrate_mode mode) { return -ENOSYS; }
+
+static inline int migrate_prep(void) { return -ENOSYS; }
+static inline int migrate_prep_local(void) { return -ENOSYS; }
+
+static inline int migrate_vmas(struct mm_struct *mm,
+		const nodemask_t *from, const nodemask_t *to,
+		unsigned long flags)
+{
+	return -ENOSYS;
+}
+
+static inline void migrate_page_copy(struct page *newpage,
+				     struct page *page) {}
+
+static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
+				  struct page *newpage, struct page *page)
+{
+	return -ENOSYS;
+}
+
+/* Possible settings for the migrate_page() method in address_operations */
+#define migrate_page NULL
+#define fail_migrate_page NULL
+
+#endif /* CONFIG_MIGRATION */
+#endif /* _LINUX_MIGRATE_H */