linux-kernel - Re: [Xen-devel] [PATCH 2/3] x86: allow dma_get_required

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Date:	Thu, 13 Nov 2014 10:30:11 +0000
From:	David Vrabel <david.vrabel@...rix.com>
To:	Jan Beulich <JBeulich@...e.com>
CC:	<x86@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<xen-devel@...ts.xenproject.org>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Ingo Molnar <mingo@...hat.com>, <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [Xen-devel] [PATCH 2/3] x86: allow dma_get_required_mask() to
 be overridden

On 13/11/14 10:25, Jan Beulich wrote:
>>>> On 12.11.14 at 16:25, <david.vrabel@...rix.com> wrote:
>> --- a/arch/x86/include/asm/device.h
>> +++ b/arch/x86/include/asm/device.h
>> @@ -13,4 +13,6 @@ struct dev_archdata {
>>  struct pdev_archdata {
>>  };
>>  
>> +#define ARCH_HAS_DMA_GET_REQUIRED_MASK
> 
> Is there a particular reason you put this here rather than in
> dma-mapping.h?

I was because asm/dma-mapping is included too late for it to work, but
looking at the current code it looks like it ought to work.

David
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