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

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Date:	Mon, 4 May 2015 15:35:37 -0700
From:	Chris Zankel <chris@...kel.net>
To:	Guenter Roeck <linux@...ck-us.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()

Hi Guenter,

Sorry for the delay. Will work on it later today or tomorrow.

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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