struct f2fs_summary *, block_t, block_t);
void rewrite_node_page(struct f2fs_sb_info *, struct page *,
struct f2fs_summary *, block_t, block_t);
+void allocate_data_block(struct f2fs_sb_info *, struct page *,
+ block_t, block_t *, struct f2fs_summary *, int);
void f2fs_wait_on_page_writeback(struct page *, enum page_type, bool);
void write_data_summaries(struct f2fs_sb_info *, block_t);
void write_node_summaries(struct f2fs_sb_info *, block_t);