-extern struct page * lookup_swap_cache(swp_entry_t);
-extern struct page * read_swap_cache_async(swp_entry_t, struct vm_area_struct *vma,
- unsigned long addr);
+extern struct page *lookup_swap_cache(swp_entry_t);
+extern struct page *read_swap_cache_async(swp_entry_t, gfp_t,
+ struct vm_area_struct *vma, unsigned long addr);
+extern struct page *swapin_readahead(swp_entry_t, gfp_t,
+ struct vm_area_struct *vma, unsigned long addr);
+