block: remove BIO_EOPNOTSUPP

Since the big barrier rewrite/removal in 2007 we never fail FLUSH or
FUA requests, which means we can remove the magic BIO_EOPNOTSUPP flag
to help propagating those to the buffer_head layer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 0 insertions, 12 deletions

diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
index dc3a9efdaab8..42468e5ab3e7 100644
--- a/fs/nilfs2/segbuf.c
+++ b/fs/nilfs2/segbuf.c
@@ -343,11 +343,6 @@ static void nilfs_end_bio_write(struct bio *bio, int err)
         const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
         struct nilfs_segment_buffer *segbuf = bio->bi_private;
 
-        if (err == -EOPNOTSUPP) {
-                set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
-                /* to be detected by nilfs_segbuf_submit_bio() */
-        }
-
         if (!uptodate)
                 atomic_inc(&segbuf->sb_err);
 
@@ -374,15 +369,8 @@ static int nilfs_segbuf_submit_bio(struct nilfs_segment_buffer *segbuf,
 
         bio->bi_end_io = nilfs_end_bio_write;
         bio->bi_private = segbuf;
-        bio_get(bio);
         submit_bio(mode, bio);
         segbuf->sb_nbio++;
-        if (bio_flagged(bio, BIO_EOPNOTSUPP)) {
-                bio_put(bio);
-                err = -EOPNOTSUPP;
-                goto failed;
-        }
-        bio_put(bio);
 
         wi->bio = NULL;
         wi->rest_blocks -= wi->end - wi->start;