[PATCH] Btrfs: scrub: remove unnecessary variable set

[PATCH] Btrfs: scrub: remove unnecessary variable set

[Liu Bo]

Variable "success" is only checked when !sctx->is_dev_replace.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
 fs/btrfs/scrub.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index e3203a1..1b5ce2f 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1444,7 +1444,6 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
 							    page_num) != 0) {
 				btrfs_dev_replace_stats_inc(
 					&fs_info->dev_replace.num_write_errors);
-				success = 0;
 			}
 		} else if (sblock_other) {
 			ret = scrub_repair_page_from_good_copy(sblock_bad,
-- 
2.9.4

Re: [PATCH] Btrfs: scrub: remove unnecessary variable set

[David Sterba]

On Fri, Mar 02, 2018 at 04:10:40PM -0700, Liu Bo wrote:
> Variable "success" is only checked when !sctx->is_dev_replace.

Though it's right, the code becomes less obvious at least to me that
it's not missing something. There are several conditions and branches,
one more explicit variable setting will not kill the performance but
helps to understand the code flow.