netdev - Re: [PATCH 01/10] x86: add Kconfig entry for DMA-API debugging

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Message-ID: <20081121164855.GB1386@amd.com>
Date:	Fri, 21 Nov 2008 17:48:55 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	iommu@...ts.linux-foundation.org
Subject: Re: [PATCH 01/10] x86: add Kconfig entry for DMA-API debugging

On Fri, Nov 21, 2008 at 05:40:14PM +0100, Ingo Molnar wrote:
> 
> * Joerg Roedel <joerg.roedel@....com> wrote:
> 
> > +config DMA_API_DEBUG
> > +	default n
> 
> 'default n' can be omitted in general from interactive Kconfig 
> entries.

Ok, then I remove it.

> 
> > +	bool "Enable debugging of DMA-API usage"
> > +	depends on X86
> 
> perhaps add a proper dependency on iommu or swiotlb presence as well - 
> in case we decide to make it all disable-able again and dont have the 
> callbacks present?

No problem. But its hard to believe that we make the DMA-API
disable-able some day ;)
The best dependency in this case should be SWIOTLB I think.

Joerg

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