Re: [PATCH] net: Use __skb_pagelen() directly in skb_cow_data()

[David Miller]

From: linmiaohe <linmiaohe@xxxxxxxxxx>
Date: Sat, 1 Aug 2020 17:30:23 +0800

> From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
> 
> 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@xxxxxxxxxx>

Applied.