linux-kernel - Re: [PATCH, RFC 18/22] Xen: SWIOTLB is only used on x86

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Date:	Thu, 2 May 2013 16:38:50 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>
Subject: Re: [PATCH, RFC 18/22] Xen: SWIOTLB is only used on x86

On Thu, 2 May 2013, Arnd Bergmann wrote:
> Enabling SWIOTLB_XEN on ARM results in build errors because the
> underlying SWIOTLB is only available on X86:
> 
> drivers/xen/swiotlb-xen.c: In function 'is_xen_swiotlb_buffer':
> drivers/xen/swiotlb-xen.c:105:2: error: implicit declaration of function 'mfn_to_local_pfn
> 
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Cc: Stefano Stabellini <stefano.stabellini@...citrix.com>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Stefano Stabellini <stefano.stabellini@...citrix.com>


>  drivers/xen/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
> index dd4d9cb..f03bf50 100644
> --- a/drivers/xen/Kconfig
> +++ b/drivers/xen/Kconfig
> @@ -141,7 +141,7 @@ config XEN_GRANT_DEV_ALLOC
>  
>  config SWIOTLB_XEN
>  	def_bool y
> -	depends on PCI
> +	depends on PCI && X86
>  	select SWIOTLB
>  
>  config XEN_TMEM
> -- 
> 1.8.1.2
> 
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