[PATCH v4 13/21] block: convert iomap ops to ->iomap_next()

Convert block iomap_ops to the new ->iomap_next() callback. The callback is
generated with the DEFINE_IOMAP_ITER_NEXT() macro, which wraps the
iomap_iter_next() helper to finish the previous mapping if needed and
produce the next one. No functional changes are intended.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
---
 block/fops.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block/fops.c b/block/fops.c
index 15783a6180de..4cff76e9eb71 100644
--- a/block/fops.c
+++ b/block/fops.c

@@ -453,8 +453,10 @@ static int blkdev_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
 	return 0;
 }
 
+static DEFINE_IOMAP_ITER_NEXT(blkdev_iomap_next, blkdev_iomap_begin);
+
 static const struct iomap_ops blkdev_iomap_ops = {
-	.iomap_begin		= blkdev_iomap_begin,
+	.iomap_next		= blkdev_iomap_next,
 };
 
 #ifdef CONFIG_BUFFER_HEAD

-- 
2.52.0