138 	loff_t (*fn)(struct file *, loff_t, int);  in vfs_llseek()  local
140 	fn = no_llseek;  in vfs_llseek()
142 		fn = default_llseek;  in vfs_llseek()
144 			fn = file->f_op->llseek;  in vfs_llseek()
146 	return fn(file, offset, origin);  in vfs_llseek()
487 		unsigned long nr_segs, size_t len, loff_t *ppos, iov_fn_t fn)  in do_sync_readv_writev()  argument
498 		ret = fn(&kiocb, iov, nr_segs, kiocb.ki_pos);  in do_sync_readv_writev()
512 		unsigned long nr_segs, loff_t *ppos, io_fn_t fn)  in do_loop_readv_writev()  argument
527 		nr = fn(filp, base, len, ppos);  in do_loop_readv_writev()
621 	io_fn_t fn;  in do_readv_writev()  local
641 		fn = file->f_op->read;  in do_readv_writev()
644 		fn = (io_fn_t)file->f_op->write;  in do_readv_writev()
652 		ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);  in do_readv_writev()