2 files changed, 9 insertions, 2 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 38356ab827c9..c8667f8b5358 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -429,6 +429,7 @@ struct kstatfs;
 struct vm_area_struct;
 struct vfsmount;
 struct cred;
+struct swap_info_struct;
 
 extern void __init inode_init(void);
 extern void __init inode_init_early(void);
@@ -640,8 +641,9 @@ struct address_space_operations {
         int (*error_remove_page)(struct address_space *, struct page *);
 
         /* swapfile support */
-        int (*swap_activate)(struct file *file);
-        int (*swap_deactivate)(struct file *file);
+        int (*swap_activate)(struct swap_info_struct *sis, struct file *file,
+                                sector_t *span);
+        void (*swap_deactivate)(struct file *file);
 };
 
 extern const struct address_space_operations empty_aops;
diff --git a/include/linux/swap.h b/include/linux/swap.h
index ab230b1ebf61..388e70601413 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -324,6 +324,11 @@ extern int swap_writepage(struct page *page, struct writeback_control *wbc);
 extern int swap_set_page_dirty(struct page *page);
 extern void end_swap_bio_read(struct bio *bio, int err);
 
+int add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,
+                unsigned long nr_pages, sector_t start_block);
+int generic_swapfile_activate(struct swap_info_struct *, struct file *,
+                sector_t *);
+
 /* linux/mm/swap_state.c */
 extern struct address_space swapper_space;
 #define total_swapcache_pages  swapper_space.nrpages