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, 1 deletions

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 5765f88b3904..c5d81e8d84c3 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -359,7 +359,6 @@ void ext4_io_submit(struct ext4_io_submit *io)
         if (bio) {
                 bio_get(io->io_bio);
                 submit_bio(io->io_op, io->io_bio);
-                BUG_ON(bio_flagged(io->io_bio, BIO_EOPNOTSUPP));
                 bio_put(io->io_bio);
         }
         io->io_bio = NULL;