Re: [PATCH 1/2] dma-mapping: zero memory returned from dma_alloc_*

From: Eugeniy Paltsev
Date: Fri Dec 14 2018 - 07:26:03 EST

Hi Christoph,

do you have any public git repository with all your dma changes?

I want to test them for ARC.


On Fri, 2018-12-14 at 09:25 +0100, Christoph Hellwig wrote:
> If we want to map memory from the DMA allocator to userspace it must be
> zeroed at allocation time to prevent stale data leaks. We already do
> this on most common architectures, but some architectures don't do this
> yet, fix them up, either by passing GFP_ZERO when we use the normal page
> allocator or doing a manual memset otherwise.
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
Eugeniy Paltsev