Re: [PATCH virtio] virtio: virtio_console: fix DMA memory allocation for rproc serial

[Christoph Hellwig]

Btw, I also still don't understand why remoteproc is using
dma_declare_coherent_memory to start with.  The virtio code has exactly
one call to dma_alloc_coherent vring_alloc_queue, a function that
already switches between two different allocators.  Why can't we just
add a third allocator specifically for these remoteproc memory carveouts
and bypass dma_declare_coherent_memory entirely?
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