block: remove bio_get_nr_vecs()

We can always fill up the bio now, no need to estimate the possible
size based on queue parameters.

Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
[hch: rebased and wrote a changelog]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index aa95566f14be..8a9d63a0c071 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -372,10 +372,9 @@ void ext4_io_submit_init(struct ext4_io_submit *io,
 static int io_submit_init_bio(struct ext4_io_submit *io,
                               struct buffer_head *bh)
 {
-        int nvecs = bio_get_nr_vecs(bh->b_bdev);
         struct bio *bio;
 
-        bio = bio_alloc(GFP_NOIO, min(nvecs, BIO_MAX_PAGES));
+        bio = bio_alloc(GFP_NOIO, BIO_MAX_PAGES);
         if (!bio)
                 return -ENOMEM;
         bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);