Problem with dma_alloc_coherent at linux-2.6.33-arm1 , withRealView platform,board PBX-A9 and armv7 instructions.

[Catalin Marinas]

On Thu, 2010-07-15 at 14:10 +0100, David Yang wrote:
> I have passed the test,when using wmb() and without PATCH 0/3;

Great, so it's a memory ordering issue.

> But,I have a  doubt : if I use the wmb(), then the l2x0.c 's patch is
> not needed?

Correct, if you add the wmb(), none of the three ordered accessors
patches are needed. But we'll probably push them anyway, in which case
the wmb() becomes superfluous.

> I will test the PATCH v3 0/3  tomorrow, without using wmb();

Thanks.

-- 
Catalin