end_write_func    392 include/linux/swap.h 	bio_end_io_t end_write_func);
end_write_func    278 mm/page_io.c   		bio_end_io_t end_write_func)
end_write_func    333 mm/page_io.c   	bio = get_swap_bio(GFP_NOIO, page, end_write_func);