- excess = (char *) last_heap->end
- - (char *) ROUNDUP ((char *)last_heap->end - excess);
- last_heap->end = (char *) last_heap->end - excess;
- }
-
- if ((*real_morecore) (- excess) == 0)
- {
- /* If the system didn't want that much memory back, adjust
- the end of the last heap to reflect that. This can occur
- if break_value is still within the original data segment. */
- last_heap->end = (char *) last_heap->end + excess;
- /* Make sure that the result of the adjustment is accurate.
- It should be, for the else clause above; the other case,
- which returns the entire last heap to the system, seems
- unlikely to trigger this mode of failure. */
- if (last_heap->end != (*real_morecore) (0))
- emacs_abort ();
+ excess = ((char *) last_heap->end
+ - (char *) PAGE_ROUNDUP ((char *) last_heap->end - excess));
+ /* If the system doesn't want that much memory back, leave
+ the end of the last heap unchanged to reflect that. This
+ can occur if break_value is still within the original
+ data segment. */
+ if (real_morecore (- excess) != 0)
+ last_heap->end = (char *) last_heap->end - excess;