30 static struct page *page_idle_get_page(unsigned long pfn)  in page_idle_get_page()
32 	struct page *page;  in page_idle_get_page()  local
38 	page = pfn_to_page(pfn);  in page_idle_get_page()
39 	if (!page || !PageLRU(page) ||  in page_idle_get_page()
40 	    !get_page_unless_zero(page))  in page_idle_get_page()
43 	zone = page_zone(page);  in page_idle_get_page()
45 	if (unlikely(!PageLRU(page))) {  in page_idle_get_page()
46 		put_page(page);  in page_idle_get_page()
47 		page = NULL;  in page_idle_get_page()
50 	return page;  in page_idle_get_page()
53 static int page_idle_clear_pte_refs_one(struct page *page,  in page_idle_clear_pte_refs_one()  argument
63 	if (unlikely(PageTransHuge(page))) {  in page_idle_clear_pte_refs_one()
64 		pmd = page_check_address_pmd(page, mm, addr,  in page_idle_clear_pte_refs_one()
71 		pte = page_check_address(page, mm, addr, &ptl, 0);  in page_idle_clear_pte_refs_one()
78 		clear_page_idle(page);  in page_idle_clear_pte_refs_one()
84 		set_page_young(page);  in page_idle_clear_pte_refs_one()
89 static void page_idle_clear_pte_refs(struct page *page)  in page_idle_clear_pte_refs()  argument
101 	if (!page_mapped(page) ||  in page_idle_clear_pte_refs()
102 	    !page_rmapping(page))  in page_idle_clear_pte_refs()
105 	need_lock = !PageAnon(page) || PageKsm(page);  in page_idle_clear_pte_refs()
106 	if (need_lock && !trylock_page(page))  in page_idle_clear_pte_refs()
109 	rmap_walk(page, (struct rmap_walk_control *)&rwc);  in page_idle_clear_pte_refs()
112 		unlock_page(page);  in page_idle_clear_pte_refs()
120 	struct page *page;  in page_idle_bitmap_read()  local
139 		page = page_idle_get_page(pfn);  in page_idle_bitmap_read()
140 		if (page) {  in page_idle_bitmap_read()
141 			if (page_is_idle(page)) {  in page_idle_bitmap_read()
147 				page_idle_clear_pte_refs(page);  in page_idle_bitmap_read()
148 				if (page_is_idle(page))  in page_idle_bitmap_read()
151 			put_page(page);  in page_idle_bitmap_read()
165 	struct page *page;  in page_idle_bitmap_write()  local
183 			page = page_idle_get_page(pfn);  in page_idle_bitmap_write()
184 			if (page) {  in page_idle_bitmap_write()
185 				page_idle_clear_pte_refs(page);  in page_idle_bitmap_write()
186 				set_page_idle(page);  in page_idle_bitmap_write()
187 				put_page(page);  in page_idle_bitmap_write()