void TestCase_free_page(void)
{
struct page *page = /* 已知*/;
struct zone *zone;
struct page *buddy;
unsigned long page_idx,buddy_idx;
unsigned long combine_idx;
int order = 0;
zone = page_zone(page);
migratetype = get_pageblock_migratetype(page);
page_idx = page_to_pfn(page);