79 int __add_to_swap_cache(struct page *page, swp_entry_t entry)  in __add_to_swap_cache()  argument
84 	VM_BUG_ON_PAGE(!PageLocked(page), page);  in __add_to_swap_cache()
85 	VM_BUG_ON_PAGE(PageSwapCache(page), page);  in __add_to_swap_cache()
86 	VM_BUG_ON_PAGE(!PageSwapBacked(page), page);  in __add_to_swap_cache()
88 	page_cache_get(page);  in __add_to_swap_cache()
89 	SetPageSwapCache(page);  in __add_to_swap_cache()
90 	set_page_private(page, entry.val);  in __add_to_swap_cache()
95 					entry.val, page);  in __add_to_swap_cache()
98 		__inc_zone_page_state(page, NR_FILE_PAGES);  in __add_to_swap_cache()
110 		set_page_private(page, 0UL);  in __add_to_swap_cache()
111 		ClearPageSwapCache(page);  in __add_to_swap_cache()
112 		page_cache_release(page);  in __add_to_swap_cache()
119 int add_to_swap_cache(struct page *page, swp_entry_t entry, gfp_t gfp_mask)  in add_to_swap_cache()  argument
125 		error = __add_to_swap_cache(page, entry);  in add_to_swap_cache()
135 void __delete_from_swap_cache(struct page *page)  in __delete_from_swap_cache()  argument
140 	VM_BUG_ON_PAGE(!PageLocked(page), page);  in __delete_from_swap_cache()
141 	VM_BUG_ON_PAGE(!PageSwapCache(page), page);  in __delete_from_swap_cache()
142 	VM_BUG_ON_PAGE(PageWriteback(page), page);  in __delete_from_swap_cache()
144 	entry.val = page_private(page);  in __delete_from_swap_cache()
146 	radix_tree_delete(&address_space->page_tree, page_private(page));  in __delete_from_swap_cache()
147 	set_page_private(page, 0);  in __delete_from_swap_cache()
148 	ClearPageSwapCache(page);  in __delete_from_swap_cache()
150 	__dec_zone_page_state(page, NR_FILE_PAGES);  in __delete_from_swap_cache()
161 int add_to_swap(struct page *page, struct list_head *list)  in add_to_swap()  argument
166 	VM_BUG_ON_PAGE(!PageLocked(page), page);  in add_to_swap()
167 	VM_BUG_ON_PAGE(!PageUptodate(page), page);  in add_to_swap()
173 	if (unlikely(PageTransHuge(page)))  in add_to_swap()
174 		if (unlikely(split_huge_page_to_list(page, list))) {  in add_to_swap()
190 	err = add_to_swap_cache(page, entry,  in add_to_swap()
194 		SetPageDirty(page);  in add_to_swap()
212 void delete_from_swap_cache(struct page *page)  in delete_from_swap_cache()  argument
217 	entry.val = page_private(page);  in delete_from_swap_cache()
221 	__delete_from_swap_cache(page);  in delete_from_swap_cache()
225 	page_cache_release(page);  in delete_from_swap_cache()
236 static inline void free_swap_cache(struct page *page)  in free_swap_cache()  argument
238 	if (PageSwapCache(page) && !page_mapped(page) && trylock_page(page)) {  in free_swap_cache()
239 		try_to_free_swap(page);  in free_swap_cache()
240 		unlock_page(page);  in free_swap_cache()
248 void free_page_and_swap_cache(struct page *page)  in free_page_and_swap_cache()  argument
250 	free_swap_cache(page);  in free_page_and_swap_cache()
251 	page_cache_release(page);  in free_page_and_swap_cache()
258 void free_pages_and_swap_cache(struct page **pages, int nr)  in free_pages_and_swap_cache()
260 	struct page **pagep = pages;  in free_pages_and_swap_cache()
275 struct page * lookup_swap_cache(swp_entry_t entry)  in lookup_swap_cache()
277 	struct page *page;  in lookup_swap_cache()  local
279 	page = find_get_page(swap_address_space(entry), entry.val);  in lookup_swap_cache()
281 	if (page) {  in lookup_swap_cache()
283 		if (TestClearPageReadahead(page))  in lookup_swap_cache()
288 	return page;  in lookup_swap_cache()
297 struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,  in read_swap_cache_async()
300 	struct page *found_page, *new_page = NULL;  in read_swap_cache_async()
450 struct page *swapin_readahead(swp_entry_t entry, gfp_t gfp_mask,  in swapin_readahead()
453 	struct page *page;  in swapin_readahead()  local
473 		page = read_swap_cache_async(swp_entry(swp_type(entry), offset),  in swapin_readahead()
475 		if (!page)  in swapin_readahead()
478 			SetPageReadahead(page);  in swapin_readahead()
479 		page_cache_release(page);  in swapin_readahead()