fetch_bitmap
if (!(freep = fetch_bitmap(hashp, i)))
freep = fetch_bitmap(hashp, free_page);
static u_int32_t *fetch_bitmap __P((HTAB *, int32_t));
!(freep = fetch_bitmap(hashp, i)))
static u_int32_t *fetch_bitmap(HTAB *, int);
freep = fetch_bitmap(hashp, free_page);