From: Kent Overstreet <kent.overstr...@gmail.com>
Make _submit_bh() handle refcounting by increasing bio->bi_remaining,
followed by bio_endio(). Since bio chaining was introduced with
196d38bccfcf ("block: Generic bio chaining"), refcounting should be
done on bi_remaining instead of ancient bio_cnt. Doing that, calling
convention can be consistent with the immutable biovecs API.
Cc: Christoph Hellwig <h...@infradead.org>
Cc: Al Viro <v...@zeniv.linux.org.uk>
Cc: linux-fsde...@vger.kernel.org
Signed-off-by: Kent Overstreet <kent.overstr...@gmail.com>
[dpark: add more description in commit message]
[mlin: rebase as Jens is changing the bi_remaining rules]
Signed-off-by: Dongsu Park <dongsu.p...@profitbricks.com>
Signed-off-by: Ming Lin <m...@kernel.org>
---
fs/buffer.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/buffer.c b/fs/buffer.c
index c7a5602..c1c0e0d 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3041,13 +3041,13 @@ int _submit_bh(int rw, struct buffer_head *bh, unsigned
long bio_flags)
if (buffer_prio(bh))
rw |= REQ_PRIO;
- bio_get(bio);
+ bio_inc_remaining(bio);
submit_bio(rw, bio);
if (bio_flagged(bio, BIO_EOPNOTSUPP))
ret = -EOPNOTSUPP;
- bio_put(bio);
+ bio_endio(bio, 0);
return ret;
}
EXPORT_SYMBOL_GPL(_submit_bh);
--
1.9.1
--
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