Re: [PATCH v4 5/6] block: enable zone-append for iov_iter of bvec type

zone-append with bvec iov_iter gives WARN_ON, and returns -EINVAL.
Add new helper to process such iov_iter and add pages in bio honoring
zone-append specific constraints.
This is used to enable zone-append with io-uring fixed-buffer.

Signed-off-by: Kanchan Joshi <redacted>
Signed-off-by: Selvakumar S <redacted>
Signed-off-by: Nitesh Shetty <redacted>
Signed-off-by: Javier Gonzalez <redacted>
---
 block/bio.c | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index 0cecdbc..ade9da7 100644
--- a/block/bio.c
+++ b/block/bio.c

@@ -975,6 +975,30 @@ static int __bio_iov_bvec_add_pages(struct bio *bio, struct iov_iter *iter)
 	iov_iter_advance(iter, size);
 	return 0;
 }
+static int __bio_iov_bvec_append_add_pages(struct bio *bio, struct iov_iter *iter)