On 15/07/2019 16:17, Sinan Kaya wrote:

On 7/15/2019 1:43 AM, Fuqian Huang wrote:

quoted

Should I rewrite the commit log? Just mention that dma_alloc_coherent
has already
zeroed the memory and not to reference the commit?

I'd like to hear from Robin Murphy that arm smmu driver follows this as
well.

I'd be lying if I said it did.

...but only because that's never been part of the SMMU driver's 
responsibility either way. The iommu-dma layer however, and thus the 
respective arm64 iommu_dma_ops, has always zeroed allocations right from 
its inception.

518a2f1925c3 was just cleaning up the last of the stragglers which 
*weren't* already clearing buffers anyway, such that we could formalise 
that behaviour into the API.

Robin.

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