Only do the `C-x C-q' warning on VC backends where it makes sense.

Fixes: debbugs:2623

2 files changed, 6 insertions, 1 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index a767eab06f4..26a5131feaa 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2011-07-11  Leo  <sdl.web@gmail.com>  (tiny change)
+
+        * files.el (toggle-read-only): Only do the `C-x C-q' warning on VC
+        backends where it makes sense (bug#2623).
+
 2011-07-11  Lars Magne Ingebrigtsen  <larsi@gnus.org>
 
         * dired-x.el (dired-guess-default): Remove duplicate shell command
diff --git a/lisp/files.el b/lisp/files.el
index c9f85ff6a1a..1071adb6967 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -4694,7 +4694,7 @@ and `view-read-only' is non-nil, enter view mode."
       (view-mode-enter))
      (t (setq buffer-read-only (not buffer-read-only))
         (force-mode-line-update)))
-    (if (vc-backend buffer-file-name)
+    (if (memq (vc-backend buffer-file-name) '(RCS SCCS))
         (message "%s" (substitute-command-keys
                   (concat "File is under version-control; "
                           "use \\[vc-next-action] to check in/out"))))))