Drop the repeated word "not".

Signed-off-by: Randy Dunlap <redacted>
Cc: Marek Lindner <redacted>
Cc: Simon Wunderlich <sw@simonwunderlich.de>
Cc: Antonio Quartulli <redacted>
Cc: Sven Eckelmann <sven@narfation.org>
Cc: b.a.t.m.a.n@lists.open-mesh.org
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
---
 net/batman-adv/fragmentation.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next-20200731.orig/net/batman-adv/fragmentation.c
+++ linux-next-20200731/net/batman-adv/fragmentation.c

@@ -306,7 +306,7 @@ free:
  * set *skb to merged packet; 2) Packet is buffered: Return true and set *skb
  * to NULL; 3) Error: Return false and free skb.
  *
- * Return: true when the packet is merged or buffered, false when skb is not not
+ * Return: true when the packet is merged or buffered, false when skb is not
  * used.
  */
 bool batadv_frag_skb_buffer(struct sk_buff **skb,