Messages in this thread | | | Date | Mon, 29 Feb 2016 15:17:49 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH v2 4/4] drivers: dma-coherent: use memset_io for DMA_MEMORY_IO mappings |
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On Mon, 29 Feb 2016 16:09:24 +0000 Brian Starkey <brian.starkey@arm.com> wrote:
> Use memset_io() for DMA_MEMORY_IO mappings which are mapped as I/O > memory, and regular memset() for DMA_MEMORY_MAP mappings. > > This fixes the below alignment fault on arm64 for DMA_MEMORY_IO > mappings, where memset() uses the DC ZVA instruction which is > invalid on device memory.
What's the urgency of this fix? "Hair on fire needed in stable asap" or "Nice to have in there for 4.6" or what?
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