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/linux-6.12.1/mm/
Dpage_alloc.c6941 struct page *page_head = page - (pfn & ((1 << order) - 1)); in take_page_off_buddy() local
6942 int page_order = buddy_order(page_head); in take_page_off_buddy()
6944 if (PageBuddy(page_head) && page_order >= order) { in take_page_off_buddy()
6945 unsigned long pfn_head = page_to_pfn(page_head); in take_page_off_buddy()
6946 int migratetype = get_pfnblock_migratetype(page_head, in take_page_off_buddy()
6949 del_page_from_free_list(page_head, zone, page_order, in take_page_off_buddy()
6951 break_down_buddy_pages(zone, page_head, page, 0, in take_page_off_buddy()
6957 if (page_count(page_head) > 0) in take_page_off_buddy()