(let* ((csp (sap-int (sb!c::control-stack-pointer-sap)))
(initial-offset (logand csp (1- bytes-per-scrub-unit)))
(end-of-stack
- (- sb!vm:control-stack-end sb!c:*backend-page-size*)))
+ (- sb!vm::*control-stack-end* sb!c:*backend-page-size*)))
(labels
((scrub (ptr offset count)
(declare (type system-area-pointer ptr)