linux-kernel - [PATCH 6/6] ipv6: remove redundant null pointer check before kfree

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Date:   Thu, 20 Sep 2018 17:37:46 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <davem@...emloft.net>
CC:     <kuznet@....inr.ac.ru>, <yoshfuji@...ux-ipv6.org>,
        <santosh@...lsio.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 6/6] ipv6: remove redundant null pointer check before kfree_skb

kfree_skb has taken the null pointer into account. hence it is safe
to remove the redundant null pointer check before kfree_skb.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
---
 net/ipv6/af_inet6.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 77ef847..e9c8cfd 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -468,12 +468,10 @@ void inet6_destroy_sock(struct sock *sk)
 	/* Release rx options */
 
 	skb = xchg(&np->pktoptions, NULL);
-	if (skb)
-		kfree_skb(skb);
+	kfree_skb(skb);
 
 	skb = xchg(&np->rxpmtu, NULL);
-	if (skb)
-		kfree_skb(skb);
+	kfree_skb(skb);
 
 	/* Free flowlabels */
 	fl6_free_socklist(sk);
-- 
1.7.12.4