prevp              66 user/umalloc.c   Header *p, *prevp;
prevp              70 user/umalloc.c   if ((prevp = freep) == 0) {
prevp              71 user/umalloc.c     base.s.ptr = freep = prevp = &base;
prevp              74 user/umalloc.c   for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
prevp              77 user/umalloc.c         prevp->s.ptr = p->s.ptr;
prevp              83 user/umalloc.c       freep = prevp;