linux-kernel - Re: [PATCH v2 0/4] dma-mapping: Define dma_{alloc,free}

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Date:	Fri, 24 May 2013 11:52:22 +0900
From:	Damian Hobson-Garcia <dhobsong@...l.co.jp>
To:	Catalin Marinas <catalin.marinas@....com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
	Will Deacon <Will.Deacon@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"msalter@...hat.com" <msalter@...hat.com>,
	"linux-c6x-dev@...ux-c6x.org" <linux-c6x-dev@...ux-c6x.org>,
	"deller@....de" <deller@....de>,
	"linux-parisc@...r.kernel.org" <linux-parisc@...r.kernel.org>
Subject: Re: [PATCH v2 0/4] dma-mapping: Define dma_{alloc,free}_attrs() for
 all archs

On 2013/05/23 18:47, Catalin Marinas wrote:
> On Thu, May 23, 2013 at 03:47:13AM +0100, Damian Hobson-Garcia wrote:
>> Hi Catalin,
>> On 2013/05/22 18:47, Catalin Marinas wrote:
>>> On Wed, May 22, 2013 at 03:37:17AM +0100, Damian Hobson-Garcia wrote:
>>>> Hello,
>>>> On 2013/04/30 12:01, Damian Hobson-Garcia wrote:
>>>>> Most architectures that define CONFIG_HAVE_DMA=y, have implementations for
>>>>> both dma_alloc_attrs() and dma_free_attrs().  All achitectures that do
>>>>> not define CONFIG_HAVE_DMA also have both of these definitions provided by
>>>>> dma-mapping-broken.h.
>>>
>>> BTW, shouldn't this be called CONFIG_HAVE_DMA_ATTRS?
>>
>> CONFIG_HAVE_DMA_ATTRS is currently used to enable the functions to
>> set/get the DMA attribute values. Poking through the headers, it looks
>> like the struct dma_attrs is defined regardless of the
>> CONFIG_HAVE_DMA_ATTRS setting, so in that respect
>> we always seem to "have" DMA attributes (if we have DMA), but they may
>> not always be meaningful (ie. set to some value).
> 
> My point was about the commit log - grep'ing the kernel for
> CONFIG_HAVE_DMA did not return anything.
> 

Oh yes, my mistake.  It should be CONFIG_HAS_DMA instead of
CONFIG_HAVE_DMA.  I'll update it.

Damian


-- 
Damian Hobson-Garcia
IGEL Co.,Ltd
http://www.igel.co.jp
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