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block: remove BIO_EOPNOTSUPP

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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 <[email protected]>
Reviewed-by: Jeff Moyer <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2015-04-24 21:41:01 +02:00 • committed by Jens Axboe
commit b25de9d6da
7 changed files with 2 additions and 38 deletions
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10
fs/buffer.c
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@ -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);