linux-kernel - Re: [PATCH] Move valid_dma_direction() from x86

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Message-ID: <20060802185527.GB4982@rhun.ibm.com>
Date:	Wed, 2 Aug 2006 21:55:27 +0300
From:	Muli Ben-Yehuda <muli@...ibm.com>
To:	Rolf Eike Beer <eike-kernel@...tec.de>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...e.de>, discuss@...-64.org
Subject: Re: [PATCH] Move valid_dma_direction() from x86_64 to generic code

On Wed, Aug 02, 2006 at 05:20:40PM +0200, Rolf Eike Beer wrote:

> As suggested by Muli Ben-Yehuda this function is moved to generic code as
> may be useful for all archs.

I like it, but ...

> diff --git a/include/asm-x86_64/dma-mapping.h b/include/asm-x86_64/dma-mapping.h
> index b6da83d..10174b1 100644
> --- a/include/asm-x86_64/dma-mapping.h
> +++ b/include/asm-x86_64/dma-mapping.h
> @@ -55,13 +55,6 @@ extern dma_addr_t bad_dma_address;
>  extern struct dma_mapping_ops* dma_ops;
>  extern int iommu_merge;
>  
> -static inline int valid_dma_direction(int dma_direction)
> -{
> -	return ((dma_direction == DMA_BIDIRECTIONAL) ||
> -		(dma_direction == DMA_TO_DEVICE) ||
> -		(dma_direction == DMA_FROM_DEVICE));
> -}
> -

Several files include asm/dma-mapping.h directly, which will now cause
them to fail to compile on x86-64 due to the missing definition for
valid_dma_direction, unless by chance another header already brought
it in indirectly. I guess the right thing to do is convert them all to
using linux/dma-mapping.h instead.

./arch/x86_64/kernel/pci-swiotlb.c:6:#include <asm/dma-mapping.h>
./drivers/net/fec_8xx/fec_main.c:40:#include <asm/dma-mapping.h>
./drivers/net/fs_enet/fs_enet.h:11:#include <asm/dma-mapping.h>
./include/asm-x86_64/swiotlb.h:5:#include <asm/dma-mapping.h>
./include/linux/dma-mapping.h:27:#include <asm/dma-mapping.h>

Cheers,
Muli
-
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