linux-kernel - Re: [PATCH] arch: m32r: include: asm: add "dma-mapping-common.h"

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Date:	Thu, 27 Jun 2013 17:27:52 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Hirokazu Takata <takata@...ux-m32r.org>,
	"dhowells@...hat.com" <dhowells@...hat.com>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	"sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-m32r@...linux-m32r.org, linux-m32r-ja@...linux-m32r.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [PATCH] arch: m32r: include: asm: add "dma-mapping-common.h"

On 06/27/2013 04:30 PM, Arnd Bergmann wrote:
> On Thursday 27 June 2013 12:50:59 Chen Gang wrote:
>> Need add generic "dma-mapping-common.h", or compiling may fail.
>>
>> The related error (with allmodconfig):
>>
>>     CC [M]  net/irda/irlan/irlan_eth.o
>>   drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_mmap’:
>>   drivers/media/v4l2-core/videobuf2-dma-contig.c:202:2: error: implicit declaration of function ‘dma_mmap_coherent’ [-Werror=implicit-function-declaration]
>>   drivers/media/v4l2-core/videobuf2-dma-contig.c: In function ‘vb2_dc_get_base_sgt’:
>>   drivers/media/v4l2-core/videobuf2-dma-contig.c:385:2: error: implicit declaration of function ‘dma_get_sgtable’ [-Werror=implicit-function-declaration]
>>
>>
>> Signed-off-by: Chen Gang <gang.chen@...anux.com>
> 
> m32r does not provide the "common" version of the dma mapping API, so this
> is certainly wrong.
> 

But m32r really has pci.h, and also can cause this issue.


Thanks.
-- 
Chen Gang
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