rem: dprintf("id: 0x%x\n", region->id);
add: dprintf("id: 0x%lx\n", region->id);
context: static void _dump_region(vm_region *region){	dprintf("dump of region at %p:\n", region);	dprintf("name: '%s'\n", region->name);	dprintf("id: 0x%x\n", region->id);	dprintf("base: 0x%lx\n", region->base);	dprintf("size: 0x%lx\n", region->size);	dprintf("lock: 0x%x\n", region->lock);	dprintf("wiring: 0x%x\n", region->wiring);	dprintf("ref_count: %d\n", region->ref_count);	dprintf("cache_ref: %p\n", region->cache_ref);	// XXX 64-bit	dprintf("cache_offset: 0x%Lx\n", region->cache_offset);	dprintf("cache_next: %p\n", region->cache_next);	dprintf("cache_prev: %p\n", region->cache_prev);}