Check if major mode is equal one of several emacs

I found a snippet to close all dired buffers, which I want to use in sunrise commander: ``` (defun er/kill-all-dired-buffers() "Kill all dired buffers." (interactive) (save-excursion (let((count 0)) (dolist(buffer (buffer-list)) (set-buffer buffer) (when (equal major-mode 'sr-mode) (or (equal major-mode 'dired-mode)) (setq count (1+ count)) (kill-buffer buffer))) (message "Killed %i dired buffer(s)." count )))) (setq sr-quit-hook 'er/kill-all-dired-buffers) ``` Issue being, I can't make it work both for sr-mode and dired-mode together. How do I check "if major mode is sr-mode OR dired-mode"? EDIT: Just a syntax error. Should be ``` (when (or (equal major-mode 'dired-mode) (equal major-mode 'sr-mode)) ``` Have to admit it's not too intuitive.