[PATCH] Optionally allow ARMv6 to use 'normal, bufferable' memoryfor DMA

Catalin Marinas catalin.marinas at arm.com
Mon May 17 06:42:16 EDT 2010

Hi Russell,

On Sat, 2010-05-15 at 10:58 +0100, Russell King - ARM Linux wrote:
> Provide a configuration option to allow the ARMv6 to use normal
> bufferable memory for coherent DMA.  This option is forced to 'y'
> for ARMv7, and offered as a configuration option on ARMv6.
> Enabling this option requires drivers to have the necessary barriers
> to ensure that data in DMA coherent memory is visible prior to the
> DMA operation commencing.
> Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>

I'm fined with this patch. So it will default to 'y' even on ARMv6 UP
cores (which I don't mind).

Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>


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