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()
38 		bio_add_page(bio, page, PAGE_SIZE, 0);  in get_swap_bio()
46 	struct page *page = bio->bi_io_vec[0].bv_page;  in end_swap_bio_write()  local
49 		SetPageError(page);  in end_swap_bio_write()
58 		set_page_dirty(page);  in end_swap_bio_write()
63 		ClearPageReclaim(page);  in end_swap_bio_write()
65 	end_page_writeback(page);  in end_swap_bio_write()
71 	struct page *page = bio->bi_io_vec[0].bv_page;  in end_swap_bio_read()  local
74 		SetPageError(page);  in end_swap_bio_read()
75 		ClearPageUptodate(page);  in end_swap_bio_read()
83 	SetPageUptodate(page);  in end_swap_bio_read()
91 	if (likely(PageSwapCache(page))) {  in end_swap_bio_read()
94 		sis = page_swap_info(page);  in end_swap_bio_read()
117 				entry.val = page_private(page);  in end_swap_bio_read()
120 				SetPageDirty(page);  in end_swap_bio_read()
128 	unlock_page(page);  in end_swap_bio_read()
228 int swap_writepage(struct page *page, struct writeback_control *wbc)  in swap_writepage()  argument
232 	if (try_to_free_swap(page)) {  in swap_writepage()
233 		unlock_page(page);  in swap_writepage()
236 	if (frontswap_store(page) == 0) {  in swap_writepage()
237 		set_page_writeback(page);  in swap_writepage()
238 		unlock_page(page);  in swap_writepage()
239 		end_page_writeback(page);  in swap_writepage()
242 	ret = __swap_writepage(page, wbc, end_swap_bio_write);  in swap_writepage()
247 static sector_t swap_page_sector(struct page *page)  in swap_page_sector()  argument
249 	return (sector_t)__page_file_index(page) << (PAGE_CACHE_SHIFT - 9);  in swap_page_sector()
252 int __swap_writepage(struct page *page, struct writeback_control *wbc,  in __swap_writepage()  argument
257 	struct swap_info_struct *sis = page_swap_info(page);  in __swap_writepage()
264 			.bv_page = page,  in __swap_writepage()
272 		kiocb.ki_pos = page_file_offset(page);  in __swap_writepage()
274 		set_page_writeback(page);  in __swap_writepage()
275 		unlock_page(page);  in __swap_writepage()
291 			set_page_dirty(page);  in __swap_writepage()
292 			ClearPageReclaim(page);  in __swap_writepage()
294 				page_file_offset(page));  in __swap_writepage()
296 		end_page_writeback(page);  in __swap_writepage()
300 	ret = bdev_write_page(sis->bdev, swap_page_sector(page), page, wbc);  in __swap_writepage()
307 	bio = get_swap_bio(GFP_NOIO, page, end_write_func);  in __swap_writepage()
309 		set_page_dirty(page);  in __swap_writepage()
310 		unlock_page(page);  in __swap_writepage()
317 	set_page_writeback(page);  in __swap_writepage()
318 	unlock_page(page);  in __swap_writepage()
324 int swap_readpage(struct page *page)  in swap_readpage()  argument
328 	struct swap_info_struct *sis = page_swap_info(page);  in swap_readpage()
330 	VM_BUG_ON_PAGE(!PageLocked(page), page);  in swap_readpage()
331 	VM_BUG_ON_PAGE(PageUptodate(page), page);  in swap_readpage()
332 	if (frontswap_load(page) == 0) {  in swap_readpage()
333 		SetPageUptodate(page);  in swap_readpage()
334 		unlock_page(page);  in swap_readpage()
342 		ret = mapping->a_ops->readpage(swap_file, page);  in swap_readpage()
348 	ret = bdev_read_page(sis->bdev, swap_page_sector(page), page);  in swap_readpage()
355 	bio = get_swap_bio(GFP_KERNEL, page, end_swap_bio_read);  in swap_readpage()
357 		unlock_page(page);  in swap_readpage()
367 int swap_set_page_dirty(struct page *page)  in swap_set_page_dirty()  argument
369 	struct swap_info_struct *sis = page_swap_info(page);  in swap_set_page_dirty()
373 		return mapping->a_ops->set_page_dirty(page);  in swap_set_page_dirty()
375 		return __set_page_dirty_no_writeback(page);  in swap_set_page_dirty()