;;; polling function if it does time out. One important use of this
;;; is to periodically call process-yield.
(declaim (type (or null function) *periodic-polling-function*))
-(defvar *periodic-polling-function*
- #!-mp nil #!+mp #'sb!mp:process-yield)
+(defvar *periodic-polling-function* nil)
(declaim (type (unsigned-byte 29) *max-event-to-sec* *max-event-to-usec*))
(defvar *max-event-to-sec* 1)
(defvar *max-event-to-usec* 0)