Re: [PATCH] ARM: dma-mapping: always clear allocated buffers

[YueHaibing]

On 2018/7/25 2:09, Christoph Hellwig wrote:
> On Tue, Jul 24, 2018 at 10:04:35PM +0800, YueHaibing wrote:
>> Sean Wang report dma_zalloc_coherent doesn't work as expect on his
>> armv7,the allocated mem is not zeroed.The reason is __alloc_from_pool
>> doesn't honor __GFP_ZERO.
> 
> Please explain the "why" a little more.  All the explanations are in
> the referenced arm64 commit and should be mentioned here as well.

ok, will send v2.

> 
> .
>