linux-kernel - Re: [PATCH resend 3/5] xtensa: Provide dummy dma_alloc_attrs() and dma_free

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Date:	Fri, 22 May 2015 21:24:13 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Chris Zankel <chris@...kel.net>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>,
	Max Filippov <jcmvbkbc@...il.com>
Subject: Re: [PATCH resend 3/5] xtensa: Provide dummy dma_alloc_attrs() and
 dma_free_attrs()

On 05/04/2015 03:35 PM, Chris Zankel wrote:
> Hi Guenter,
>
> Sorry for the delay. Will work on it later today or tomorrow.
>
Hi Chris,

I see this patch in -next, but still not in mainline.
Are you planning to send it to Linus anytime soon ?

Thanks,
Guenter

> Thanks,
> -Chris
>
>
> On Mon, May 4, 2015 at 3:30 PM, Guenter Roeck <linux@...ck-us.net> wrote:
>> xtensa:allmodconfig fails to build with the following errors.
>>
>> drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c:
>>          In function ‘gk20a_instobj_dtor_dma’:
>> drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c:154:2: error:
>>          implicit declaration of function ‘dma_free_attrs’
>> drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c:
>>          In function ‘gk20a_instobj_ctor_dma’:
>> drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c:218:2: error:
>>          implicit declaration of function ‘dma_alloc_attrs’
>>
>> Xtensa does not provide those functions at this time.
>> Provide dummy implementations to avoid build errors.
>>
>> Acked-by: Max Filippov <jcmvbkbc@...il.com>
>> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
>> ---
>> Please consider pushing this patch into mainline, or provide feedback
>> on how to improve it to be acceptable.
>>
>>   arch/xtensa/include/asm/dma-mapping.h | 13 +++++++++++++
>>   1 file changed, 13 insertions(+)
>>
>> diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h
>> index 172a02a6ad14..ba78ccf651e7 100644
>> --- a/arch/xtensa/include/asm/dma-mapping.h
>> +++ b/arch/xtensa/include/asm/dma-mapping.h
>> @@ -185,4 +185,17 @@ static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt,
>>          return -EINVAL;
>>   }
>>
>> +static inline void *dma_alloc_attrs(struct device *dev, size_t size,
>> +                                   dma_addr_t *dma_handle, gfp_t flag,
>> +                                   struct dma_attrs *attrs)
>> +{
>> +       return NULL;
>> +}
>> +
>> +static inline void dma_free_attrs(struct device *dev, size_t size,
>> +                                 void *vaddr, dma_addr_t dma_handle,
>> +                                 struct dma_attrs *attrs)
>> +{
>> +}
>> +
>>   #endif /* _XTENSA_DMA_MAPPING_H */
>> --
>> 2.1.0
>>
>

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