X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Flinux%2Ffs.h;h=e059da9470076a7af7a2a68e76bd29605369e75a;hb=21bbd691827e3610ef975a88863859381ac8d8e0;hp=84bb449b9b01734dd864df59008724805de550af;hpb=cf9e50a920be24b734fb91f19b8844f8509cb981;p=powerpc.git

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 84bb449b9b..e059da9470 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -363,6 +363,8 @@ struct address_space_operations {
 			loff_t offset, unsigned long nr_segs);
 	struct page* (*get_xip_page)(struct address_space *, sector_t,
 			int);
+	/* migrate the contents of a page to the specified target */
+	int (*migratepage) (struct page *, struct page *);
 };
 
 struct backing_dev_info;
@@ -1719,6 +1721,12 @@ extern void simple_release_fs(struct vfsmount **mount, int *count);
 
 extern ssize_t simple_read_from_buffer(void __user *, size_t, loff_t *, const void *, size_t);
 
+#ifdef CONFIG_MIGRATION
+extern int buffer_migrate_page(struct page *, struct page *);
+#else
+#define buffer_migrate_page NULL
+#endif
+
 extern int inode_change_ok(struct inode *, struct iattr *);
 extern int __must_check inode_setattr(struct inode *, struct iattr *);