buddy_order_unsafe
unsigned long freepage_order = buddy_order_unsafe(page);
if (buddy_order_unsafe(page) >= order)
const unsigned int order = buddy_order_unsafe(page);
buddy_order_unsafe(head) >= order)
freepage_order = buddy_order_unsafe(page);
unsigned long freepage_order = buddy_order_unsafe(page);
unsigned long order = buddy_order_unsafe(page);