btrfs: directly call into crypto framework for checksumming

[linux-2.6-block.git] / mm / page_io.c

diff --git a/mm/page_io.c b/mm/page_io.c
index 2e8019d0e048dde3ea8a7507f085bb1570553604..189415852077e89f67f9e8b1880f9341a8bc56eb 100644 (file)
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -29,10 +29,9 @@
 static struct bio *get_swap_bio(gfp_t gfp_flags,
                                struct page *page, bio_end_io_t end_io)
 {
-       int i, nr = hpage_nr_pages(page);
        struct bio *bio;
 
-       bio = bio_alloc(gfp_flags, nr);
+       bio = bio_alloc(gfp_flags, 1);
        if (bio) {
                struct block_device *bdev;
 
@@ -41,9 +40,7 @@ static struct bio *get_swap_bio(gfp_t gfp_flags,
                bio->bi_iter.bi_sector <<= PAGE_SHIFT - 9;
                bio->bi_end_io = end_io;
 
-               for (i = 0; i < nr; i++)
-                       bio_add_page(bio, page + i, PAGE_SIZE, 0);
-               VM_BUG_ON(bio->bi_iter.bi_size != PAGE_SIZE * nr);
+               bio_add_page(bio, page, PAGE_SIZE * hpage_nr_pages(page), 0);
        }
        return bio;
 }