32 static struct page *page_idle_get_page(unsigned long pfn)  in page_idle_get_page()
34 	struct page *page = pfn_to_online_page(pfn);  in page_idle_get_page()  local
37 	if (!page || !PageLRU(page) ||  in page_idle_get_page()
38 	    !get_page_unless_zero(page))  in page_idle_get_page()
41 	pgdat = page_pgdat(page);  in page_idle_get_page()
43 	if (unlikely(!PageLRU(page))) {  in page_idle_get_page()
44 		put_page(page);  in page_idle_get_page()
45 		page = NULL;  in page_idle_get_page()
48 	return page;  in page_idle_get_page()
51 static bool page_idle_clear_pte_refs_one(struct page *page,  in page_idle_clear_pte_refs_one()  argument
56 		.page = page,  in page_idle_clear_pte_refs_one()
81 		clear_page_idle(page);  in page_idle_clear_pte_refs_one()
87 		set_page_young(page);  in page_idle_clear_pte_refs_one()
92 static void page_idle_clear_pte_refs(struct page *page)  in page_idle_clear_pte_refs()  argument
104 	if (!page_mapped(page) ||  in page_idle_clear_pte_refs()
105 	    !page_rmapping(page))  in page_idle_clear_pte_refs()
108 	need_lock = !PageAnon(page) || PageKsm(page);  in page_idle_clear_pte_refs()
109 	if (need_lock && !trylock_page(page))  in page_idle_clear_pte_refs()
112 	rmap_walk(page, (struct rmap_walk_control *)&rwc);  in page_idle_clear_pte_refs()
115 		unlock_page(page);  in page_idle_clear_pte_refs()
123 	struct page *page;  in page_idle_bitmap_read()  local
142 		page = page_idle_get_page(pfn);  in page_idle_bitmap_read()
143 		if (page) {  in page_idle_bitmap_read()
144 			if (page_is_idle(page)) {  in page_idle_bitmap_read()
150 				page_idle_clear_pte_refs(page);  in page_idle_bitmap_read()
151 				if (page_is_idle(page))  in page_idle_bitmap_read()
154 			put_page(page);  in page_idle_bitmap_read()
168 	struct page *page;  in page_idle_bitmap_write()  local
186 			page = page_idle_get_page(pfn);  in page_idle_bitmap_write()
187 			if (page) {  in page_idle_bitmap_write()
188 				page_idle_clear_pte_refs(page);  in page_idle_bitmap_write()
189 				set_page_idle(page);  in page_idle_bitmap_write()
190 				put_page(page);  in page_idle_bitmap_write()