[PATCH v3 02/11] Btrfs: remove unnecessary code of stripe_index assignment in __btrfs_map_block

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From: Zhao Lei <zhaolei@xxxxxxxxxxxxxx>

stripe_index's value was set again in latter line:
stripe_index = 0;

Signed-off-by: Zhao Lei <zhaolei@xxxxxxxxxxxxxx>
Signed-off-by: Miao Xie <miaox@xxxxxxxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxx>
---
Changelog v1 -> v3:
- None.
---
 fs/btrfs/volumes.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 41b0dff..66d5035 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5167,9 +5167,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
 
 			/* push stripe_nr back to the start of the full stripe */
 			stripe_nr = raid56_full_stripe_start;
-			do_div(stripe_nr, stripe_len);
-
-			stripe_index = do_div(stripe_nr, nr_data_stripes(map));
+			do_div(stripe_nr, stripe_len * nr_data_stripes(map));
 
 			/* RAID[56] write or recovery. Return all stripes */
 			num_stripes = map->num_stripes;
-- 
1.9.3

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