On Tue, Jan 26, 2021 at 07:07:44AM +0000, Christoph Hellwig wrote:

quoted

+config DMABUF_HEAPS_CHUNK
+	bool "DMA-BUF CHUNK Heap"
+	depends on DMABUF_HEAPS && DMA_CMA
+	help
+	  Choose this option to enable dma-buf CHUNK heap. This heap is backed
+	  by the Contiguous Memory Allocator (CMA) and allocates the buffers that
+	  are arranged into a list of fixed size chunks taken from CMA.

Overly long line, which in text flowing text is really, really annoying.

Many more later.  Remember that > 80 chars are only allowed if they
significantly improve readability.  

Let me make it shorter than 80 chars in next revision.
Thanks for the reivew, Christoph.