253 	loff_t (*fn)(struct file *, loff_t, int);  in vfs_llseek()  local
255 	fn = no_llseek;  in vfs_llseek()
258 			fn = file->f_op->llseek;  in vfs_llseek()
260 	return fn(file, offset, whence);  in vfs_llseek()
656 		loff_t *ppos, iter_fn_t fn)  in do_iter_readv_writev()  argument
664 	ret = fn(&kiocb, iter);  in do_iter_readv_writev()
672 		loff_t *ppos, io_fn_t fn)  in do_loop_readv_writev()  argument
680 		nr = fn(filp, iovec.iov_base, iovec.iov_len, ppos);  in do_loop_readv_writev()
783 	io_fn_t fn;  in do_readv_writev()  local
799 		fn = file->f_op->read;  in do_readv_writev()
802 		fn = (io_fn_t)file->f_op->write;  in do_readv_writev()
810 		ret = do_loop_readv_writev(file, &iter, pos, fn);  in do_readv_writev()
957 	io_fn_t fn;  in compat_do_readv_writev()  local
973 		fn = file->f_op->read;  in compat_do_readv_writev()
976 		fn = (io_fn_t)file->f_op->write;  in compat_do_readv_writev()
984 		ret = do_loop_readv_writev(file, &iter, pos, fn);  in compat_do_readv_writev()