linux-kernel - Re: [PATCH] net: add APIs for manipulating skb page fragments.

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Message-Id: <20110820.173133.1612902138924735868.davem@davemloft.net>
Date:	Sat, 20 Aug 2011 17:31:33 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ian.campbell@...rix.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	eric.dumazet@...il.com, mirq-linux@...e.qmqm.pl
Subject: Re: [PATCH] net: add APIs for manipulating skb page fragments.

From: Ian Campbell <ian.campbell@...rix.com>
Date: Fri, 19 Aug 2011 17:25:00 +0100

> The primary aim is to add skb_frag_(ref|unref) in order to remove the use of
> bare get/put_page on SKB pages fragments and to isolate users from subsequent
> changes to the skb_frag_t data structure.
> 
> Signed-off-by: Ian Campbell <ian.campbell@...rix.com>

You're going to have to protect all of the things using the interfaces
from linux/dma-mapping.h with CONFIG_HAS_DMA otherwise it won't build
on platforms like S390.
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