Re: [PATCH V5 2/3] mm: dmapool: Align to ARCH_DMA_MINALIGN in non-coherent DMA mode

[Christoph Hellwig]

The dmapool code uses dma_alloc_coherent to allocate each element,
and dma_alloc_coherent must align to ARCH_DMA_MINALIGN already.
If you implementation doesn't do that it needs to be fixed.