From: linmiaohe <linmiaohe@huawei.com>
To: <davem@davemloft.net>, <kuba@kernel.org>, <fw@strlen.de>,
<pshelar@ovn.org>, <martin.varghese@nokia.com>,
<pabeni@redhat.com>, <edumazet@google.com>, <dcaratti@redhat.com>,
<steffen.klassert@secunet.com>, <shmulik@metanetworks.com>,
<kyk.segfault@gmail.com>
Cc: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linmiaohe@huawei.com>
Subject: [PATCH] net: Use __skb_pagelen() directly in skb_cow_data()
Date: Sat, 1 Aug 2020 17:30:23 +0800 [thread overview]
Message-ID: <1596274223-24555-1-git-send-email-linmiaohe@huawei.com> (raw)
From: Miaohe Lin <linmiaohe@huawei.com>
In fact, skb_pagelen() - skb_headlen() is equal to __skb_pagelen(), use it
directly to avoid unnecessary skb_headlen() call.
Also fix the CHECK note of checkpatch.pl:
Comparison to NULL could be written "!__pskb_pull_tail"
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
net/core/skbuff.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b8afefe6f6b6..3219c26ddfae 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -4413,7 +4413,7 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
* at the moment even if they are anonymous).
*/
if ((skb_cloned(skb) || skb_shinfo(skb)->nr_frags) &&
- __pskb_pull_tail(skb, skb_pagelen(skb)-skb_headlen(skb)) == NULL)
+ !__pskb_pull_tail(skb, __skb_pagelen(skb)))
return -ENOMEM;
/* Easy case. Most of packets will go this way. */
--
2.19.1
next reply other threads:[~2020-08-01 9:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-01 9:30 linmiaohe [this message]
2020-08-03 22:38 ` [PATCH] net: Use __skb_pagelen() directly in skb_cow_data() David Miller
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