rem: return 0;
add: return B_OK;
context: vm_cache_init(kernel_args *ka){	vm_page p;	page_cache_table = hash_init(PAGE_TABLE_SIZE, (int)&p.hash_next - (int)&p,		&page_compare_func, &page_hash_func);	if (!page_cache_table)		panic("vm_cache_init: cannot allocate memory for page cache hash table\n");	page_cache_table_lock = 0;	return 0;}