btrfs: stop looking at btrfs_bio->iter in index_one_bio

All the bios that index_one_bio operates on are the bios submitted by the
upper layer.  These are never resubmitted to an actual device by the
raid56 code, and thus the iter never changes from the initial state.
Thus we can always just use bi_iter directly as it will be the same as
the saved copy.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 00cd9e8db7ae0b9bedef6ec2f22766278f231c1a..3c58869779375b19411e5c5664d9bebd4ef7d01d 100644 (file)
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1106,9 +1106,6 @@ static void index_one_bio(struct btrfs_raid_bio *rbio, struct bio *bio)
        u32 offset = (bio->bi_iter.bi_sector << SECTOR_SHIFT) -
                     rbio->bioc->raid_map[0];
 
-       if (bio_flagged(bio, BIO_CLONED))
-               bio->bi_iter = btrfs_bio(bio)->iter;
-
        bio_for_each_segment(bvec, bio, iter) {
                u32 bvec_offset;