page_zone

Name:The identification function is mainly used by the buddy allocator for* determining if two pages could be buddies

Proto:static inline int page_zone_id(struct page *page)

Type:int

Parameter:

Type	Parameter	Name
struct page *	page

**Caller**
Name	Describe
page_is_buddy	This function checks whether a page is free && is the buddy* we can coalesce a page and its buddy if* (a) the buddy is not in a hole (check before calling!) &&* (b) the buddy is in the buddy system &&* (c) a page and its buddy have the same order &&
__pageblock_pfn_to_page	Check that the whole (or subset of) a pageblock given by the interval of* [start_pfn, end_pfn) is valid and within the same zone, before scanning it* with the migration of free compaction scanner

Function report