netdev - Re: [PATCH] net: fix comment above build

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Message-ID: <1374605662.3449.49.camel@edumazet-glaptop>
Date:	Tue, 23 Jul 2013 11:54:22 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Florian Fainelli <f.fainelli@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] net: fix comment above build_skb()

On Tue, 2013-07-23 at 19:04 +0100, Florian Fainelli wrote:

> Sure, would something like:
> 
> "@data must have been allocated by kmalloc() if frag_size is 0,
> otherwise any data buffer (vmalloc, DMA..) is suitable"
> 

Actually not, the other case must be a page frag, because we are going
to use get_page() and put_page() during skb lifetime.

netlink case is really special/hacky, because it makes sure those
get_page()/put_page() calls wont ever happen.



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