Hi,

The attached patch adds a new option ~org-src-native-defun-movements~
that makes ~beginning-of-defun~, ~end-of-defun~ and ~eval-defun~ work
natively when called from inside an org src block : those functions
are called from an org src edit buffer, in the appropriate language
mode. Without this patch, calling =eval-defun= on elisp code fails.

With this option set to t by default, this is a breaking change. To
get to the beginning/end of a src block you'd have to call
~org-backward-element~ or ~org-forward-element~ directly, instead of
~beginning-of-defun~. Or you could disable the new behaviour by
setting ~org-src-native-defun-movements~ to nil.

Regards,

-- 
Sébastien Miquel