28 				struct page *page, bio_end_io_t end_io)  in get_swap_bio()  argument
34 		bio->bi_iter.bi_sector = map_swap_page(page, &bio->bi_bdev);  in get_swap_bio()
36 		bio->bi_io_vec[0].bv_page = page;  in get_swap_bio()
49 	struct page *page = bio->bi_io_vec[0].bv_page;  in end_swap_bio_write()  local
52 		SetPageError(page);  in end_swap_bio_write()
61 		set_page_dirty(page);  in end_swap_bio_write()
66 		ClearPageReclaim(page);  in end_swap_bio_write()
68 	end_page_writeback(page);  in end_swap_bio_write()
75 	struct page *page = bio->bi_io_vec[0].bv_page;  in end_swap_bio_read()  local
78 		SetPageError(page);  in end_swap_bio_read()
79 		ClearPageUptodate(page);  in end_swap_bio_read()
87 	SetPageUptodate(page);  in end_swap_bio_read()
95 	if (likely(PageSwapCache(page))) {  in end_swap_bio_read()
98 		sis = page_swap_info(page);  in end_swap_bio_read()
121 				entry.val = page_private(page);  in end_swap_bio_read()
124 				SetPageDirty(page);  in end_swap_bio_read()
132 	unlock_page(page);  in end_swap_bio_read()
232 int swap_writepage(struct page *page, struct writeback_control *wbc)  in swap_writepage()  argument
236 	if (try_to_free_swap(page)) {  in swap_writepage()
237 		unlock_page(page);  in swap_writepage()
240 	if (frontswap_store(page) == 0) {  in swap_writepage()
241 		set_page_writeback(page);  in swap_writepage()
242 		unlock_page(page);  in swap_writepage()
243 		end_page_writeback(page);  in swap_writepage()
246 	ret = __swap_writepage(page, wbc, end_swap_bio_write);  in swap_writepage()
251 static sector_t swap_page_sector(struct page *page)  in swap_page_sector()  argument
253 	return (sector_t)__page_file_index(page) << (PAGE_CACHE_SHIFT - 9);  in swap_page_sector()
256 int __swap_writepage(struct page *page, struct writeback_control *wbc,  in __swap_writepage()  argument
261 	struct swap_info_struct *sis = page_swap_info(page);  in __swap_writepage()
268 			.bv_page = page,  in __swap_writepage()
281 		kiocb.ki_pos = page_file_offset(page);  in __swap_writepage()
284 		set_page_writeback(page);  in __swap_writepage()
285 		unlock_page(page);  in __swap_writepage()
303 			set_page_dirty(page);  in __swap_writepage()
304 			ClearPageReclaim(page);  in __swap_writepage()
306 				page_file_offset(page));  in __swap_writepage()
308 		end_page_writeback(page);  in __swap_writepage()
312 	ret = bdev_write_page(sis->bdev, swap_page_sector(page), page, wbc);  in __swap_writepage()
319 	bio = get_swap_bio(GFP_NOIO, page, end_write_func);  in __swap_writepage()
321 		set_page_dirty(page);  in __swap_writepage()
322 		unlock_page(page);  in __swap_writepage()
329 	set_page_writeback(page);  in __swap_writepage()
330 	unlock_page(page);  in __swap_writepage()
336 int swap_readpage(struct page *page)  in swap_readpage()  argument
340 	struct swap_info_struct *sis = page_swap_info(page);  in swap_readpage()
342 	VM_BUG_ON_PAGE(!PageLocked(page), page);  in swap_readpage()
343 	VM_BUG_ON_PAGE(PageUptodate(page), page);  in swap_readpage()
344 	if (frontswap_load(page) == 0) {  in swap_readpage()
345 		SetPageUptodate(page);  in swap_readpage()
346 		unlock_page(page);  in swap_readpage()
354 		ret = mapping->a_ops->readpage(swap_file, page);  in swap_readpage()
360 	ret = bdev_read_page(sis->bdev, swap_page_sector(page), page);  in swap_readpage()
367 	bio = get_swap_bio(GFP_KERNEL, page, end_swap_bio_read);  in swap_readpage()
369 		unlock_page(page);  in swap_readpage()
379 int swap_set_page_dirty(struct page *page)  in swap_set_page_dirty()  argument
381 	struct swap_info_struct *sis = page_swap_info(page);  in swap_set_page_dirty()
385 		return mapping->a_ops->set_page_dirty(page);  in swap_set_page_dirty()
387 		return __set_page_dirty_no_writeback(page);  in swap_set_page_dirty()