# \[PATCH 07/10\] dm snapshot: Delete an unnecessary variable initialisation in merge\_callback()

- From: SF Markus Elfring \<hidden\>
- Date: 2016-09-29 09:15:47 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2016/09/4845859
- Thread: https://ratatoskr.run/linux-raid/2016/09/4845849/t.md

```text
From: Markus Elfring <redacted>
Date: Thu, 29 Sep 2016 09:00:06 +0200

The local variable "b" will be set to an appropriate pointer a bit later.
Thus omit the explicit initialisation at the beginning.

Signed-off-by: Markus Elfring <redacted>
---
 drivers/md/dm-snap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 06b1b69..1d90131 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -1046,7 +1046,7 @@ static void error_bios(struct bio *bio);
 static void merge_callback(int read_err, unsigned long write_err, void *context)
 {
 	struct dm_snapshot *s = context;
-	struct bio *b = NULL;
+	struct bio *b;
 
 	if (read_err || write_err) {
 		if (read_err)
-- 
2.10.0

```