[PATCH 2/3] xfs: use bio_reuse in the zone GC code

[Christoph Hellwig <hch@lst.de>]

Replace our somewhat fragile code to reuse the bio, which caused a
regression in the past with the block layer bio_reuse helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
---
 fs/xfs/xfs_zone_gc.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/fs/xfs/xfs_zone_gc.c b/fs/xfs/xfs_zone_gc.c
index 3c52cc1497d4..40408b1132e0 100644
--- a/fs/xfs/xfs_zone_gc.c
+++ b/fs/xfs/xfs_zone_gc.c
@@ -811,8 +811,6 @@ xfs_zone_gc_write_chunk(
 {
 	struct xfs_zone_gc_data	*data = chunk->data;
 	struct xfs_mount	*mp = chunk->ip->i_mount;
-	phys_addr_t		bvec_paddr =
-		bvec_phys(bio_first_bvec_all(&chunk->bio));
 	struct xfs_gc_bio	*split_chunk;
 
 	if (chunk->bio.bi_status)
@@ -825,10 +823,7 @@ xfs_zone_gc_write_chunk(
 	WRITE_ONCE(chunk->state, XFS_GC_BIO_NEW);
 	list_move_tail(&chunk->entry, &data->writing);
 
-	bio_reset(&chunk->bio, mp->m_rtdev_targp->bt_bdev, REQ_OP_WRITE);
-	bio_add_folio_nofail(&chunk->bio, chunk->scratch->folio, chunk->len,
-			offset_in_folio(chunk->scratch->folio, bvec_paddr));
-
+	bio_reuse(&chunk->bio);
 	while ((split_chunk = xfs_zone_gc_split_write(data, chunk)))
 		xfs_zone_gc_submit_write(data, split_chunk);
 	xfs_zone_gc_submit_write(data, chunk);
-- 
2.47.3