--- include/linux/pagemap.h

+++ include/linux/pagemap.h

@@ -458,6 +458,8 @@ int add_to_page_cache_locked(struct page

pgoff_t index, gfp_t gfp_mask);

int add_to_page_cache_lru(struct page *page, struct address_space *mapping,

pgoff_t index, gfp_t gfp_mask);

+int __add_to_page_cache_lru(struct page *page, struct address_space *mapping,

+ pgoff_t offset, gfp_t gfp_mask, int tail);

extern void delete_from_page_cache(struct page *page);

extern void __delete_from_page_cache(struct page *page);

int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask);