linux-kernel - Re: [PATCH] x86-64: define dma noncoherent API functions

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Date:	Wed, 31 Jan 2007 22:07:14 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	ak@...e.de, Andrew Morton <akpm@...l.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86-64: define dma noncoherent API functions

On Wed, Jan 31, 2007 at 07:41:07AM -0500, Jeff Garzik wrote:
> x86-64 is missing these:
> 
> Signed-off-by: Jeff Garzik <jeff@...zik.org>
> 
> diff --git a/include/asm-x86_64/dma-mapping.h b/include/asm-x86_64/dma-mapping.h
> index be9ec68..49dbab0 100644
> --- a/include/asm-x86_64/dma-mapping.h
> +++ b/include/asm-x86_64/dma-mapping.h
> @@ -63,6 +63,9 @@ static inline int dma_mapping_error(dma_addr_t dma_addr)
>  	return (dma_addr == bad_dma_address);
>  }
>  
> +#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
> +#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
> +

What are these, and why haven't they been discussed in such places as
linux-arch so that architecture maintainers can comment on them ?

Ditto for the recently added dma_sync_range_whatever functions ?

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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