rebirth-of-buffer.el

(defvar killed-buffers '())

(defun add-killed-buffer-list ()
  (let ((b (buffer-file-name)))
    (unless (null b)
      (add-to-list 'killed-buffers b))))
(add-hook 'kill-buffer-hook 'add-killed-buffer-list)

(defun rebirth-of-buffer ()
  (interactive)
  (if (car killed-buffers)
      (let ((b (car killed-buffers)))
        (setq killed-buffers (cdr killed-buffers))
        (find-file b))))
(global-set-key (kbd "C-x u") 'rebirth-of-buffer)