Add ibuffer-filter-by-derived-mode to ibuffer menu and doc

* lisp/ibuffer.el (ibuffer-mode-map, ibuffer-mode):
Add ibuffer-filter-by-derived-mode.

* etc/NEWS: Related markup.

2 files changed, 9 insertions, 2 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 5551828c847..8228d857233 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,8 @@
 2012-11-11  Glenn Morris  <rgm@gnu.org>
 
+	* ibuffer.el (ibuffer-mode-map, ibuffer-mode):
+	Add ibuffer-filter-by-derived-mode.
+
 	* ibuffer.el (ibuffer-mode-map): Don't have two menu items with
 	the same name shadowing each other.
 
diff --git a/lisp/ibuffer.el b/lisp/ibuffer.el
index e5d9910a186..72ca189e9d5 100644
--- a/lisp/ibuffer.el
+++ b/lisp/ibuffer.el
@@ -636,6 +636,9 @@ directory, like `default-directory'."
     (define-key-after map [menu-bar view filter filter-by-used-mode]
       '(menu-item "Add filter by a major mode in use..."
         ibuffer-filter-by-used-mode))
+    (define-key-after map [menu-bar view filter filter-by-derived-mode]
+      '(menu-item "Add filter by derived mode..."
+                  ibuffer-filter-by-derived-mode))
     (define-key-after map [menu-bar view filter filter-by-name]
       '(menu-item "Add filter by buffer name..." ibuffer-filter-by-name))
     (define-key-after map [menu-bar view filter filter-by-filename]
@@ -2438,8 +2441,9 @@ Marking commands:
 
 Filtering commands:
 
-  '\\[ibuffer-filter-by-mode]' - Add a filter by major mode.
-  '\\[ibuffer-filter-by-used-mode]' - Add a filter by major mode now in use.
+  '\\[ibuffer-filter-by-mode]' - Add a filter by any major mode.
+  '\\[ibuffer-filter-by-used-mode]' - Add a filter by a major mode now in use.
+  '\\[ibuffer-filter-by-derived-mode]' - Add a filter by derived mode.
   '\\[ibuffer-filter-by-name]' - Add a filter by buffer name.
   '\\[ibuffer-filter-by-content]' - Add a filter by buffer content.
   '\\[ibuffer-filter-by-filename]' - Add a filter by filename.