linux-kernel - RE: [PATCH 28/29] dmaengine: kill tx

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Message-ID: <129600E5E5FB004392DDC3FB599660D7B554819A@irsmsx504.ger.corp.intel.com>
Date:	Mon, 14 Sep 2009 16:01:58 +0100
From:	"Sosnowski, Maciej" <maciej.sosnowski@...el.com>
To:	"Williams, Dan J" <dan.j.williams@...el.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH 28/29] dmaengine: kill tx_list

Williams, Dan J wrote:
> The tx_list attribute of struct dma_async_tx_descriptor is common to
> most, but not all dma driver implementations.  None of the upper level
> code (dmaengine/async_tx) uses it, so allow drivers to implement it
> locally if they need it.  This saves sizeof(struct list_head) bytes for
> drivers that do not manage descriptors with a linked list (e.g.: ioatdma
> v2,3).
> 
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
> ---

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@...el.com>--
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