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

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Date:	Thu, 27 Jun 2013 10:30:51 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Chen Gang <gang.chen@...anux.com>
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 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.

	Arnd
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