We can simply return NULL here. The callers already handle that.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index da0d5d1..fa7d21e 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -394,6 +394,8 @@ static struct dm_deferred_set *dm_deferred_set_create(void)
struct dm_deferred_set *ds;

ds = kmalloc(sizeof(*ds), GFP_KERNEL);
+ if (!ds)
+ return NULL;

spin_lock_init(&ds->lock);
ds->current_entry = 0;

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