13  * page_is_file_lru - should the page be on a file LRU or anon LRU?
14  * @page: the page to test
16  * Returns 1 if @page is a regular filesystem backed page cache page or a lazily
17  * freed anonymous page (e.g. via MADV_FREE).  Returns 0 if @page is a normal
18  * anonymous page, a tmpfs page or otherwise ram or swap backed page.  Used by
19  * functions that manipulate the LRU lists, to sort a page onto the right LRU
22  * We would like to get this info without a page flag, but the state
23  * needs to survive until the page is last deleted from the LRU, which
26 static inline int page_is_file_lru(struct page *page)  in page_is_file_lru()  argument
28 	return !PageSwapBacked(page);  in page_is_file_lru()
52 static __always_inline void add_page_to_lru_list(struct page *page,  in add_page_to_lru_list()  argument
55 	trace_android_vh_add_page_to_lrulist(page, false, lru);  in add_page_to_lru_list()
56 	update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));  in add_page_to_lru_list()
57 	list_add(&page->lru, &lruvec->lists[lru]);  in add_page_to_lru_list()
60 static __always_inline void add_page_to_lru_list_tail(struct page *page,  in add_page_to_lru_list_tail()  argument
63 	trace_android_vh_add_page_to_lrulist(page, false, lru);  in add_page_to_lru_list_tail()
64 	update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));  in add_page_to_lru_list_tail()
65 	list_add_tail(&page->lru, &lruvec->lists[lru]);  in add_page_to_lru_list_tail()
68 static __always_inline void del_page_from_lru_list(struct page *page,  in del_page_from_lru_list()  argument
71 	trace_android_vh_del_page_from_lrulist(page, false, lru);  in del_page_from_lru_list()
72 	list_del(&page->lru);  in del_page_from_lru_list()
73 	update_lru_size(lruvec, lru, page_zonenum(page), -thp_nr_pages(page));  in del_page_from_lru_list()
77  * page_lru_base_type - which LRU list type should a page be on?
78  * @page: the page to test
82  * Returns the base LRU type - file or anon - @page should be on.
84 static inline enum lru_list page_lru_base_type(struct page *page)  in page_lru_base_type()  argument
86 	if (page_is_file_lru(page))  in page_lru_base_type()
92  * page_off_lru - which LRU list was page on? clearing its lru flags.
93  * @page: the page to test
95  * Returns the LRU list a page was on, as an index into the array of LRU
98 static __always_inline enum lru_list page_off_lru(struct page *page)  in page_off_lru()  argument
102 	if (PageUnevictable(page)) {  in page_off_lru()
103 		__ClearPageUnevictable(page);  in page_off_lru()
106 		lru = page_lru_base_type(page);  in page_off_lru()
107 		if (PageActive(page)) {  in page_off_lru()
108 			__ClearPageActive(page);  in page_off_lru()
116  * page_lru - which LRU list should a page be on?
117  * @page: the page to test
119  * Returns the LRU list a page should be on, as an index
122 static __always_inline enum lru_list page_lru(struct page *page)  in page_lru()  argument
126 	if (PageUnevictable(page))  in page_lru()
129 		lru = page_lru_base_type(page);  in page_lru()
130 		if (PageActive(page))  in page_lru()