[PATCH] Offer 'uncacheable memory' as DMA coherent memory for ARMv6

Russell King - ARM Linux linux at arm.linux.org.uk
Wed Jan 13 14:02:26 EST 2010


On Wed, Jan 13, 2010 at 12:22:11PM -0600, Aguirre, Sergio wrote:
> (Replacing linux-arm-kernel at lists.arm.linux.org.uk with linux-arm-kernel at lists.infradead.org, as I got a SMTP error: "550 Please direct your message to the new mailing lists on lists.infradead.org")

Oops.

> > +config ARM_DMA_MEM_BUFFERABLE
> > +	bool "Use non-cacheable memory for DMA" if CPU_V6 && !CPU_V7
> > +	default y
> 
> Perhaps you meant here:
> 
> default y if CPU_V6 && !CPU_V7

No - default y if CPU_V6 || CPU_V7 - we need it enabled for V7 CPUs.



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