27 static struct bio *get_swap_bio(gfp_t gfp_flags,  in get_swap_bio()
30 	struct bio *bio;  in get_swap_bio()  local
32 	bio = bio_alloc(gfp_flags, 1);  in get_swap_bio()
33 	if (bio) {  in get_swap_bio()
34 		bio->bi_iter.bi_sector = map_swap_page(page, &bio->bi_bdev);  in get_swap_bio()
35 		bio->bi_iter.bi_sector <<= PAGE_SHIFT - 9;  in get_swap_bio()
36 		bio->bi_end_io = end_io;  in get_swap_bio()
38 		bio_add_page(bio, page, PAGE_SIZE, 0);  in get_swap_bio()
39 		BUG_ON(bio->bi_iter.bi_size != PAGE_SIZE);  in get_swap_bio()
41 	return bio;  in get_swap_bio()
44 void end_swap_bio_write(struct bio *bio)  in end_swap_bio_write()  argument
46 	struct page *page = bio->bi_io_vec[0].bv_page;  in end_swap_bio_write()
48 	if (bio->bi_error) {  in end_swap_bio_write()
60 				imajor(bio->bi_bdev->bd_inode),  in end_swap_bio_write()
61 				iminor(bio->bi_bdev->bd_inode),  in end_swap_bio_write()
62 				(unsigned long long)bio->bi_iter.bi_sector);  in end_swap_bio_write()
66 	bio_put(bio);  in end_swap_bio_write()
69 static void end_swap_bio_read(struct bio *bio)  in end_swap_bio_read()  argument
71 	struct page *page = bio->bi_io_vec[0].bv_page;  in end_swap_bio_read()
73 	if (bio->bi_error) {  in end_swap_bio_read()
77 				imajor(bio->bi_bdev->bd_inode),  in end_swap_bio_read()
78 				iminor(bio->bi_bdev->bd_inode),  in end_swap_bio_read()
79 				(unsigned long long)bio->bi_iter.bi_sector);  in end_swap_bio_read()
129 	bio_put(bio);  in end_swap_bio_read()
255 	struct bio *bio;  in __swap_writepage()  local
307 	bio = get_swap_bio(GFP_NOIO, page, end_write_func);  in __swap_writepage()
308 	if (bio == NULL) {  in __swap_writepage()
319 	submit_bio(rw, bio);  in __swap_writepage()
326 	struct bio *bio;  in swap_readpage()  local
355 	bio = get_swap_bio(GFP_KERNEL, page, end_swap_bio_read);  in swap_readpage()
356 	if (bio == NULL) {  in swap_readpage()
362 	submit_bio(READ, bio);  in swap_readpage()