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, 10 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index c7a5602d01ee..efd85e0e8660 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2938,10 +2938,6 @@ static void end_bio_bh_io_sync(struct bio *bio, int err)
 {
         struct buffer_head *bh = bio->bi_private;
 
-        if (err == -EOPNOTSUPP) {
-                set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
-        }
-
         if (unlikely (test_bit(BIO_QUIET,&bio->bi_flags)))
                 set_bit(BH_Quiet, &bh->b_state);
 
@@ -3041,13 +3037,7 @@ int _submit_bh(int rw, struct buffer_head *bh, unsigned long bio_flags)
         if (buffer_prio(bh))
                 rw |= REQ_PRIO;
 
-        bio_get(bio);
         submit_bio(rw, bio);
-
-        if (bio_flagged(bio, BIO_EOPNOTSUPP))
-                ret = -EOPNOTSUPP;
-
-        bio_put(bio);
         return ret;
 }
 EXPORT_SYMBOL_GPL(_submit_bh);