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_io_vec[0].bv_page = page;  in get_swap_bio()
37 		bio->bi_io_vec[0].bv_len = PAGE_SIZE;  in get_swap_bio()
38 		bio->bi_io_vec[0].bv_offset = 0;  in get_swap_bio()
39 		bio->bi_vcnt = 1;  in get_swap_bio()
40 		bio->bi_iter.bi_size = PAGE_SIZE;  in get_swap_bio()
41 		bio->bi_end_io = end_io;  in get_swap_bio()
43 	return bio;  in get_swap_bio()
46 void end_swap_bio_write(struct bio *bio, int err)  in end_swap_bio_write()  argument
48 	const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);  in end_swap_bio_write()
49 	struct page *page = bio->bi_io_vec[0].bv_page;  in end_swap_bio_write()
63 				imajor(bio->bi_bdev->bd_inode),  in end_swap_bio_write()
64 				iminor(bio->bi_bdev->bd_inode),  in end_swap_bio_write()
65 				(unsigned long long)bio->bi_iter.bi_sector);  in end_swap_bio_write()
69 	bio_put(bio);  in end_swap_bio_write()
72 void end_swap_bio_read(struct bio *bio, int err)  in end_swap_bio_read()  argument
74 	const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);  in end_swap_bio_read()
75 	struct page *page = bio->bi_io_vec[0].bv_page;  in end_swap_bio_read()
81 				imajor(bio->bi_bdev->bd_inode),  in end_swap_bio_read()
82 				iminor(bio->bi_bdev->bd_inode),  in end_swap_bio_read()
83 				(unsigned long long)bio->bi_iter.bi_sector);  in end_swap_bio_read()
133 	bio_put(bio);  in end_swap_bio_read()
257 	void (*end_write_func)(struct bio *, int))  in __swap_writepage()  argument
259 	struct bio *bio;  in __swap_writepage()  local
311 	bio = get_swap_bio(GFP_NOIO, page, end_write_func);  in __swap_writepage()
312 	if (bio == NULL) {  in __swap_writepage()
323 	submit_bio(rw, bio);  in __swap_writepage()
330 	struct bio *bio;  in swap_readpage()  local
359 	bio = get_swap_bio(GFP_KERNEL, page, end_swap_bio_read);  in swap_readpage()
360 	if (bio == NULL) {  in swap_readpage()
366 	submit_bio(READ, bio);  in swap_readpage()