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